MOD: android tests gtg, now windoze tests

.vscode/settings.json

@@ -0,0 +1,7 @@
+{
+  "chat.tools.terminal.autoApprove": {
+    "cargo check": true,
+    "flutter_rust_bridge_codegen": true,
+    "rustup": true
+  }
+}

README.rst

@@ -18,7 +18,7 @@ This repository contains:
 
 * A small Rust bridge crate referencing ``ccc_rust`` via a git tag
 * Generated ``flutter_rust_bridge`` bindings
-* A Flutter plugin scaffold (iOS / Android / macOS)
+* A Flutter plugin scaffold (iOS / Android / macOS / Linux / Windows)
 * A clean Dart API surface for applications
 
 This plugin does **not** implement cryptography itself.

android/build.gradle

@@ -1,7 +1,7 @@
 // The Android Gradle Plugin builds the native code with the Android NDK.
 
-group = "com.example.ccc_cryptography"
+group 'com.flutter_rust_bridge.ccc_cryptography'
-version = "1.0"
+version '1.0'
 
 buildscript {
     repositories {
@@ -11,7 +11,7 @@ buildscript {
 
     dependencies {
         // The Android Gradle Plugin knows how to build native code with the NDK.
-        classpath("com.android.tools.build:gradle:8.11.1")
+        classpath 'com.android.tools.build:gradle:7.3.0'
     }
 }
 
@@ -22,42 +22,35 @@ rootProject.allprojects {
     }
 }
 
-apply plugin: "com.android.library"
+apply plugin: 'com.android.library'
 
 android {
-    namespace = "com.example.ccc_cryptography"
+    if (project.android.hasProperty("namespace")) {
+        namespace 'com.flutter_rust_bridge.ccc_cryptography'
+    }
 
-    // Bumping the plugin compileSdk version requires all clients of this plugin
+    // Bumping the plugin compileSdkVersion requires all clients of this plugin
     // to bump the version in their app.
-    compileSdk = 36
+    compileSdkVersion 33
 
     // Use the NDK version
     // declared in /android/app/build.gradle file of the Flutter project.
-    // Replace it with a version number if this plugin requires a specific NDK version.
+    // Replace it with a version number if this plugin requires a specfic NDK version.
     // (e.g. ndkVersion "23.1.7779620")
-    ndkVersion = android.ndkVersion
+    ndkVersion android.ndkVersion
-
-    // Invoke the shared CMake build with the Android Gradle Plugin.
-    externalNativeBuild {
-        cmake {
-            path = "../src/CMakeLists.txt"
-
-            // The default CMake version for the Android Gradle Plugin is 3.10.2.
-            // https://developer.android.com/studio/projects/install-ndk#vanilla_cmake
-            //
-            // The Flutter tooling requires that developers have CMake 3.10 or later
-            // installed. You should not increase this version, as doing so will cause
-            // the plugin to fail to compile for some customers of the plugin.
-            // version "3.10.2"
-        }
-    }
 
     compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_17
+        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility = JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_1_8
     }
 
     defaultConfig {
-        minSdk = 24
+        minSdkVersion 19
     }
 }
+
+apply from: "../cargokit/gradle/plugin.gradle"
+cargokit {
+    manifestDir = "../rust"
+    libname = "ccc_cryptography"
+}

android/src/main/AndroidManifest.xml

@@ -1,3 +1,2 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
-  package="com.example.ccc_cryptography">
 </manifest>

cargokit/.gitignore

@@ -0,0 +1,4 @@
+target
+.dart_tool
+*.iml
+!pubspec.lock

cargokit/LICENSE

@@ -0,0 +1,42 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+Copyright 2022 Matej Knopp
+
+================================================================================
+
+MIT LICENSE
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
+OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+================================================================================
+
+APACHE LICENSE, VERSION 2.0
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+

cargokit/README

@@ -0,0 +1,11 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+Experimental repository to provide glue for seamlessly integrating cargo build
+with flutter plugins and packages.
+
+See https://matejknopp.com/post/flutter_plugin_in_rust_with_no_prebuilt_binaries/
+for a tutorial on how to use Cargokit.
+
+Example plugin available at https://github.com/irondash/hello_rust_ffi_plugin.
+

cargokit/build_pod.sh

@@ -0,0 +1,58 @@
+#!/bin/sh
+set -e
+
+BASEDIR=$(dirname "$0")
+
+# Workaround for https://github.com/dart-lang/pub/issues/4010
+BASEDIR=$(cd "$BASEDIR" ; pwd -P)
+
+# Remove XCode SDK from path. Otherwise this breaks tool compilation when building iOS project
+NEW_PATH=`echo $PATH | tr ":" "\n" | grep -v "Contents/Developer/" | tr "\n" ":"`
+
+export PATH=${NEW_PATH%?} # remove trailing :
+
+env
+
+# Platform name (macosx, iphoneos, iphonesimulator)
+export CARGOKIT_DARWIN_PLATFORM_NAME=$PLATFORM_NAME
+
+# Arctive architectures (arm64, armv7, x86_64), space separated.
+export CARGOKIT_DARWIN_ARCHS=$ARCHS
+
+# Current build configuration (Debug, Release)
+export CARGOKIT_CONFIGURATION=$CONFIGURATION
+
+# Path to directory containing Cargo.toml.
+export CARGOKIT_MANIFEST_DIR=$PODS_TARGET_SRCROOT/$1
+
+# Temporary directory for build artifacts.
+export CARGOKIT_TARGET_TEMP_DIR=$TARGET_TEMP_DIR
+
+# Output directory for final artifacts.
+export CARGOKIT_OUTPUT_DIR=$PODS_CONFIGURATION_BUILD_DIR/$PRODUCT_NAME
+
+# Directory to store built tool artifacts.
+export CARGOKIT_TOOL_TEMP_DIR=$TARGET_TEMP_DIR/build_tool
+
+# Directory inside root project. Not necessarily the top level directory of root project.
+export CARGOKIT_ROOT_PROJECT_DIR=$SRCROOT
+
+FLUTTER_EXPORT_BUILD_ENVIRONMENT=(
+  "$PODS_ROOT/../Flutter/ephemeral/flutter_export_environment.sh" # macOS
+  "$PODS_ROOT/../Flutter/flutter_export_environment.sh" # iOS
+)
+
+for path in "${FLUTTER_EXPORT_BUILD_ENVIRONMENT[@]}"
+do
+  if [[ -f "$path" ]]; then
+    source "$path"
+  fi
+done
+
+sh "$BASEDIR/run_build_tool.sh" build-pod "$@"
+
+# Make a symlink from built framework to phony file, which will be used as input to
+# build script. This should force rebuild (podspec currently doesn't support alwaysOutOfDate
+# attribute on custom build phase)
+ln -fs "$OBJROOT/XCBuildData/build.db" "${BUILT_PRODUCTS_DIR}/cargokit_phony"
+ln -fs "${BUILT_PRODUCTS_DIR}/${EXECUTABLE_PATH}" "${BUILT_PRODUCTS_DIR}/cargokit_phony_out"

cargokit/build_tool/README.md

@@ -0,0 +1,5 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+A sample command-line application with an entrypoint in `bin/`, library code
+in `lib/`, and example unit test in `test/`.

cargokit/build_tool/analysis_options.yaml

@@ -0,0 +1,34 @@
+# This is copied from Cargokit (which is the official way to use it currently)
+# Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+# This file configures the static analysis results for your project (errors,
+# warnings, and lints).
+#
+# This enables the 'recommended' set of lints from `package:lints`.
+# This set helps identify many issues that may lead to problems when running
+# or consuming Dart code, and enforces writing Dart using a single, idiomatic
+# style and format.
+#
+# If you want a smaller set of lints you can change this to specify
+# 'package:lints/core.yaml'. These are just the most critical lints
+# (the recommended set includes the core lints).
+# The core lints are also what is used by pub.dev for scoring packages.
+
+include: package:lints/recommended.yaml
+
+# Uncomment the following section to specify additional rules.
+
+linter:
+  rules:
+    - prefer_relative_imports
+    - directives_ordering
+
+# analyzer:
+#   exclude:
+#     - path/to/excluded/files/**
+
+# For more information about the core and recommended set of lints, see
+# https://dart.dev/go/core-lints
+
+# For additional information about configuring this file, see
+# https://dart.dev/guides/language/analysis-options

cargokit/build_tool/bin/build_tool.dart

@@ -0,0 +1,8 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+import 'package:build_tool/build_tool.dart' as build_tool;
+
+void main(List<String> arguments) {
+  build_tool.runMain(arguments);
+}

cargokit/build_tool/lib/build_tool.dart

@@ -0,0 +1,8 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+import 'src/build_tool.dart' as build_tool;
+
+Future<void> runMain(List<String> args) async {
+  return build_tool.runMain(args);
+}

cargokit/build_tool/lib/src/android_environment.dart

@@ -0,0 +1,211 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+import 'dart:io';
+import 'dart:isolate';
+import 'dart:math' as math;
+
+import 'package:collection/collection.dart';
+import 'package:path/path.dart' as path;
+import 'package:version/version.dart';
+
+import 'target.dart';
+import 'util.dart';
+
+class AndroidEnvironment {
+  AndroidEnvironment({
+    required this.sdkPath,
+    required this.ndkVersion,
+    required this.minSdkVersion,
+    required this.targetTempDir,
+    required this.target,
+  });
+
+  static void clangLinkerWrapper(List<String> args) {
+    final clang = Platform.environment['_CARGOKIT_NDK_LINK_CLANG'];
+    if (clang == null) {
+      throw Exception(
+          "cargo-ndk rustc linker: didn't find _CARGOKIT_NDK_LINK_CLANG env var");
+    }
+    final target = Platform.environment['_CARGOKIT_NDK_LINK_TARGET'];
+    if (target == null) {
+      throw Exception(
+          "cargo-ndk rustc linker: didn't find _CARGOKIT_NDK_LINK_TARGET env var");
+    }
+
+    runCommand(clang, [
+      target,
+      ...args,
+    ]);
+  }
+
+  /// Full path to Android SDK.
+  final String sdkPath;
+
+  /// Full version of Android NDK.
+  final String ndkVersion;
+
+  /// Minimum supported SDK version.
+  final int minSdkVersion;
+
+  /// Target directory for build artifacts.
+  final String targetTempDir;
+
+  /// Target being built.
+  final Target target;
+
+  bool ndkIsInstalled() {
+    final ndkPath = path.join(sdkPath, 'ndk', ndkVersion);
+    final ndkPackageXml = File(path.join(ndkPath, 'package.xml'));
+    return ndkPackageXml.existsSync();
+  }
+
+  void installNdk({
+    required String javaHome,
+  }) {
+    final sdkManagerExtension = Platform.isWindows ? '.bat' : '';
+    final sdkManager = path.join(
+      sdkPath,
+      'cmdline-tools',
+      'latest',
+      'bin',
+      'sdkmanager$sdkManagerExtension',
+    );
+
+    log.info('Installing NDK $ndkVersion');
+    runCommand(sdkManager, [
+      '--install',
+      'ndk;$ndkVersion',
+    ], environment: {
+      'JAVA_HOME': javaHome,
+    });
+  }
+
+  Future<Map<String, String>> buildEnvironment() async {
+    final hostArch = Platform.isMacOS
+        ? "darwin-x86_64"
+        : (Platform.isLinux ? "linux-x86_64" : "windows-x86_64");
+
+    final ndkPath = path.join(sdkPath, 'ndk', ndkVersion);
+    final toolchainPath = path.join(
+      ndkPath,
+      'toolchains',
+      'llvm',
+      'prebuilt',
+      hostArch,
+      'bin',
+    );
+
+    final minSdkVersion =
+        math.max(target.androidMinSdkVersion!, this.minSdkVersion);
+
+    final exe = Platform.isWindows ? '.exe' : '';
+
+    final arKey = 'AR_${target.rust}';
+    final arValue = ['${target.rust}-ar', 'llvm-ar', 'llvm-ar.exe']
+        .map((e) => path.join(toolchainPath, e))
+        .firstWhereOrNull((element) => File(element).existsSync());
+    if (arValue == null) {
+      throw Exception('Failed to find ar for $target in $toolchainPath');
+    }
+
+    final targetArg = '--target=${target.rust}$minSdkVersion';
+
+    final ccKey = 'CC_${target.rust}';
+    final ccValue = path.join(toolchainPath, 'clang$exe');
+    final cfFlagsKey = 'CFLAGS_${target.rust}';
+    final cFlagsValue = targetArg;
+
+    final cxxKey = 'CXX_${target.rust}';
+    final cxxValue = path.join(toolchainPath, 'clang++$exe');
+    final cxxFlagsKey = 'CXXFLAGS_${target.rust}';
+    final cxxFlagsValue = targetArg;
+
+    final linkerKey =
+        'cargo_target_${target.rust.replaceAll('-', '_')}_linker'.toUpperCase();
+
+    final ranlibKey = 'RANLIB_${target.rust}';
+    final ranlibValue = path.join(toolchainPath, 'llvm-ranlib$exe');
+
+    // Tell bindgen (libclang) where to find Android system headers like
+    // <pthread.h>.  Without this, cross-compilation of crates that use
+    // bindgen will fail with "fatal error: 'pthread.h' file not found".
+    final sysroot = path.join(
+      ndkPath,
+      'toolchains',
+      'llvm',
+      'prebuilt',
+      hostArch,
+      'sysroot',
+    );
+    final bindgenKey =
+        'BINDGEN_EXTRA_CLANG_ARGS_${target.rust.replaceAll('-', '_')}';
+    final bindgenValue = '--sysroot=$sysroot $targetArg';
+
+    final ndkVersionParsed = Version.parse(ndkVersion);
+    final rustFlagsKey = 'CARGO_ENCODED_RUSTFLAGS';
+    final rustFlagsValue = _libGccWorkaround(targetTempDir, ndkVersionParsed);
+
+    final runRustTool =
+        Platform.isWindows ? 'run_build_tool.cmd' : 'run_build_tool.sh';
+
+    final packagePath = (await Isolate.resolvePackageUri(
+            Uri.parse('package:build_tool/buildtool.dart')))!
+        .toFilePath();
+    final selfPath = path.canonicalize(path.join(
+      packagePath,
+      '..',
+      '..',
+      '..',
+      runRustTool,
+    ));
+
+    // Make sure that run_build_tool is working properly even initially launched directly
+    // through dart run.
+    final toolTempDir =
+        Platform.environment['CARGOKIT_TOOL_TEMP_DIR'] ?? targetTempDir;
+
+    return {
+      arKey: arValue,
+      ccKey: ccValue,
+      cfFlagsKey: cFlagsValue,
+      cxxKey: cxxValue,
+      cxxFlagsKey: cxxFlagsValue,
+      ranlibKey: ranlibValue,
+      rustFlagsKey: rustFlagsValue,
+      linkerKey: selfPath,
+      bindgenKey: bindgenValue,
+      // Recognized by main() so we know when we're acting as a wrapper
+      '_CARGOKIT_NDK_LINK_TARGET': targetArg,
+      '_CARGOKIT_NDK_LINK_CLANG': ccValue,
+      'CARGOKIT_TOOL_TEMP_DIR': toolTempDir,
+    };
+  }
+
+  // Workaround for libgcc missing in NDK23, inspired by cargo-ndk
+  String _libGccWorkaround(String buildDir, Version ndkVersion) {
+    final workaroundDir = path.join(
+      buildDir,
+      'cargokit',
+      'libgcc_workaround',
+      '${ndkVersion.major}',
+    );
+    Directory(workaroundDir).createSync(recursive: true);
+    if (ndkVersion.major >= 23) {
+      File(path.join(workaroundDir, 'libgcc.a'))
+          .writeAsStringSync('INPUT(-lunwind)');
+    } else {
+      // Other way around, untested, forward libgcc.a from libunwind once Rust
+      // gets updated for NDK23+.
+      File(path.join(workaroundDir, 'libunwind.a'))
+          .writeAsStringSync('INPUT(-lgcc)');
+    }
+
+    var rustFlags = Platform.environment['CARGO_ENCODED_RUSTFLAGS'] ?? '';
+    if (rustFlags.isNotEmpty) {
+      rustFlags = '$rustFlags\x1f';
+    }
+    rustFlags = '$rustFlags-L\x1f$workaroundDir';
+    return rustFlags;
+  }
+}

cargokit/build_tool/lib/src/artifacts_provider.dart

@@ -0,0 +1,266 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+import 'dart:io';
+
+import 'package:ed25519_edwards/ed25519_edwards.dart';
+import 'package:http/http.dart';
+import 'package:logging/logging.dart';
+import 'package:path/path.dart' as path;
+
+import 'builder.dart';
+import 'crate_hash.dart';
+import 'options.dart';
+import 'precompile_binaries.dart';
+import 'rustup.dart';
+import 'target.dart';
+
+class Artifact {
+  /// File system location of the artifact.
+  final String path;
+
+  /// Actual file name that the artifact should have in destination folder.
+  final String finalFileName;
+
+  AritifactType get type {
+    if (finalFileName.endsWith('.dll') ||
+        finalFileName.endsWith('.dll.lib') ||
+        finalFileName.endsWith('.pdb') ||
+        finalFileName.endsWith('.so') ||
+        finalFileName.endsWith('.dylib')) {
+      return AritifactType.dylib;
+    } else if (finalFileName.endsWith('.lib') || finalFileName.endsWith('.a')) {
+      return AritifactType.staticlib;
+    } else {
+      throw Exception('Unknown artifact type for $finalFileName');
+    }
+  }
+
+  Artifact({
+    required this.path,
+    required this.finalFileName,
+  });
+}
+
+final _log = Logger('artifacts_provider');
+
+class ArtifactProvider {
+  ArtifactProvider({
+    required this.environment,
+    required this.userOptions,
+  });
+
+  final BuildEnvironment environment;
+  final CargokitUserOptions userOptions;
+
+  Future<Map<Target, List<Artifact>>> getArtifacts(List<Target> targets) async {
+    final result = await _getPrecompiledArtifacts(targets);
+
+    final pendingTargets = List.of(targets);
+    pendingTargets.removeWhere((element) => result.containsKey(element));
+
+    if (pendingTargets.isEmpty) {
+      return result;
+    }
+
+    final rustup = Rustup();
+    for (final target in targets) {
+      final builder = RustBuilder(target: target, environment: environment);
+      builder.prepare(rustup);
+      _log.info('Building ${environment.crateInfo.packageName} for $target');
+      final targetDir = await builder.build();
+      // For local build accept both static and dynamic libraries.
+      final artifactNames = <String>{
+        ...getArtifactNames(
+          target: target,
+          libraryName: environment.crateInfo.packageName,
+          aritifactType: AritifactType.dylib,
+          remote: false,
+        ),
+        ...getArtifactNames(
+          target: target,
+          libraryName: environment.crateInfo.packageName,
+          aritifactType: AritifactType.staticlib,
+          remote: false,
+        )
+      };
+      final artifacts = artifactNames
+          .map((artifactName) => Artifact(
+                path: path.join(targetDir, artifactName),
+                finalFileName: artifactName,
+              ))
+          .where((element) => File(element.path).existsSync())
+          .toList();
+      result[target] = artifacts;
+    }
+    return result;
+  }
+
+  Future<Map<Target, List<Artifact>>> _getPrecompiledArtifacts(
+      List<Target> targets) async {
+    if (userOptions.usePrecompiledBinaries == false) {
+      _log.info('Precompiled binaries are disabled');
+      return {};
+    }
+    if (environment.crateOptions.precompiledBinaries == null) {
+      _log.fine('Precompiled binaries not enabled for this crate');
+      return {};
+    }
+
+    final start = Stopwatch()..start();
+    final crateHash = CrateHash.compute(environment.manifestDir,
+        tempStorage: environment.targetTempDir);
+    _log.fine(
+        'Computed crate hash $crateHash in ${start.elapsedMilliseconds}ms');
+
+    final downloadedArtifactsDir =
+        path.join(environment.targetTempDir, 'precompiled', crateHash);
+    Directory(downloadedArtifactsDir).createSync(recursive: true);
+
+    final res = <Target, List<Artifact>>{};
+
+    for (final target in targets) {
+      final requiredArtifacts = getArtifactNames(
+        target: target,
+        libraryName: environment.crateInfo.packageName,
+        remote: true,
+      );
+      final artifactsForTarget = <Artifact>[];
+
+      for (final artifact in requiredArtifacts) {
+        final fileName = PrecompileBinaries.fileName(target, artifact);
+        final downloadedPath = path.join(downloadedArtifactsDir, fileName);
+        if (!File(downloadedPath).existsSync()) {
+          final signatureFileName =
+              PrecompileBinaries.signatureFileName(target, artifact);
+          await _tryDownloadArtifacts(
+            crateHash: crateHash,
+            fileName: fileName,
+            signatureFileName: signatureFileName,
+            finalPath: downloadedPath,
+          );
+        }
+        if (File(downloadedPath).existsSync()) {
+          artifactsForTarget.add(Artifact(
+            path: downloadedPath,
+            finalFileName: artifact,
+          ));
+        } else {
+          break;
+        }
+      }
+
+      // Only provide complete set of artifacts.
+      if (artifactsForTarget.length == requiredArtifacts.length) {
+        _log.fine('Found precompiled artifacts for $target');
+        res[target] = artifactsForTarget;
+      }
+    }
+
+    return res;
+  }
+
+  static Future<Response> _get(Uri url, {Map<String, String>? headers}) async {
+    int attempt = 0;
+    const maxAttempts = 10;
+    while (true) {
+      try {
+        return await get(url, headers: headers);
+      } on SocketException catch (e) {
+        // Try to detect reset by peer error and retry.
+        if (attempt++ < maxAttempts &&
+            (e.osError?.errorCode == 54 || e.osError?.errorCode == 10054)) {
+          _log.severe(
+              'Failed to download $url: $e, attempt $attempt of $maxAttempts, will retry...');
+          await Future.delayed(Duration(seconds: 1));
+          continue;
+        } else {
+          rethrow;
+        }
+      }
+    }
+  }
+
+  Future<void> _tryDownloadArtifacts({
+    required String crateHash,
+    required String fileName,
+    required String signatureFileName,
+    required String finalPath,
+  }) async {
+    final precompiledBinaries = environment.crateOptions.precompiledBinaries!;
+    final prefix = precompiledBinaries.uriPrefix;
+    final url = Uri.parse('$prefix$crateHash/$fileName');
+    final signatureUrl = Uri.parse('$prefix$crateHash/$signatureFileName');
+    _log.fine('Downloading signature from $signatureUrl');
+    final signature = await _get(signatureUrl);
+    if (signature.statusCode == 404) {
+      _log.warning(
+          'Precompiled binaries not available for crate hash $crateHash ($fileName)');
+      return;
+    }
+    if (signature.statusCode != 200) {
+      _log.severe(
+          'Failed to download signature $signatureUrl: status ${signature.statusCode}');
+      return;
+    }
+    _log.fine('Downloading binary from $url');
+    final res = await _get(url);
+    if (res.statusCode != 200) {
+      _log.severe('Failed to download binary $url: status ${res.statusCode}');
+      return;
+    }
+    if (verify(
+        precompiledBinaries.publicKey, res.bodyBytes, signature.bodyBytes)) {
+      File(finalPath).writeAsBytesSync(res.bodyBytes);
+    } else {
+      _log.shout('Signature verification failed! Ignoring binary.');
+    }
+  }
+}
+
+enum AritifactType {
+  staticlib,
+  dylib,
+}
+
+AritifactType artifactTypeForTarget(Target target) {
+  if (target.darwinPlatform != null) {
+    return AritifactType.staticlib;
+  } else {
+    return AritifactType.dylib;
+  }
+}
+
+List<String> getArtifactNames({
+  required Target target,
+  required String libraryName,
+  required bool remote,
+  AritifactType? aritifactType,
+}) {
+  aritifactType ??= artifactTypeForTarget(target);
+  if (target.darwinArch != null) {
+    if (aritifactType == AritifactType.staticlib) {
+      return ['lib$libraryName.a'];
+    } else {
+      return ['lib$libraryName.dylib'];
+    }
+  } else if (target.rust.contains('-windows-')) {
+    if (aritifactType == AritifactType.staticlib) {
+      return ['$libraryName.lib'];
+    } else {
+      return [
+        '$libraryName.dll',
+        '$libraryName.dll.lib',
+        if (!remote) '$libraryName.pdb'
+      ];
+    }
+  } else if (target.rust.contains('-linux-')) {
+    if (aritifactType == AritifactType.staticlib) {
+      return ['lib$libraryName.a'];
+    } else {
+      return ['lib$libraryName.so'];
+    }
+  } else {
+    throw Exception("Unsupported target: ${target.rust}");
+  }
+}

cargokit/build_tool/lib/src/build_cmake.dart

@@ -0,0 +1,40 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+import 'dart:io';
+
+import 'package:path/path.dart' as path;
+
+import 'artifacts_provider.dart';
+import 'builder.dart';
+import 'environment.dart';
+import 'options.dart';
+import 'target.dart';
+
+class BuildCMake {
+  final CargokitUserOptions userOptions;
+
+  BuildCMake({required this.userOptions});
+
+  Future<void> build() async {
+    final targetPlatform = Environment.targetPlatform;
+    final target = Target.forFlutterName(Environment.targetPlatform);
+    if (target == null) {
+      throw Exception("Unknown target platform: $targetPlatform");
+    }
+
+    final environment = BuildEnvironment.fromEnvironment(isAndroid: false);
+    final provider =
+        ArtifactProvider(environment: environment, userOptions: userOptions);
+    final artifacts = await provider.getArtifacts([target]);
+
+    final libs = artifacts[target]!;
+
+    for (final lib in libs) {
+      if (lib.type == AritifactType.dylib) {
+        File(lib.path)
+            .copySync(path.join(Environment.outputDir, lib.finalFileName));
+      }
+    }
+  }
+}

cargokit/build_tool/lib/src/build_gradle.dart

@@ -0,0 +1,49 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+import 'dart:io';
+
+import 'package:logging/logging.dart';
+import 'package:path/path.dart' as path;
+
+import 'artifacts_provider.dart';
+import 'builder.dart';
+import 'environment.dart';
+import 'options.dart';
+import 'target.dart';
+
+final log = Logger('build_gradle');
+
+class BuildGradle {
+  BuildGradle({required this.userOptions});
+
+  final CargokitUserOptions userOptions;
+
+  Future<void> build() async {
+    final targets = Environment.targetPlatforms.map((arch) {
+      final target = Target.forFlutterName(arch);
+      if (target == null) {
+        throw Exception(
+            "Unknown darwin target or platform: $arch, ${Environment.darwinPlatformName}");
+      }
+      return target;
+    }).toList();
+
+    final environment = BuildEnvironment.fromEnvironment(isAndroid: true);
+    final provider =
+        ArtifactProvider(environment: environment, userOptions: userOptions);
+    final artifacts = await provider.getArtifacts(targets);
+
+    for (final target in targets) {
+      final libs = artifacts[target]!;
+      final outputDir = path.join(Environment.outputDir, target.android!);
+      Directory(outputDir).createSync(recursive: true);
+
+      for (final lib in libs) {
+        if (lib.type == AritifactType.dylib) {
+          File(lib.path).copySync(path.join(outputDir, lib.finalFileName));
+        }
+      }
+    }
+  }
+}

cargokit/build_tool/lib/src/build_pod.dart

@@ -0,0 +1,89 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+import 'dart:io';
+
+import 'package:path/path.dart' as path;
+
+import 'artifacts_provider.dart';
+import 'builder.dart';
+import 'environment.dart';
+import 'options.dart';
+import 'target.dart';
+import 'util.dart';
+
+class BuildPod {
+  BuildPod({required this.userOptions});
+
+  final CargokitUserOptions userOptions;
+
+  Future<void> build() async {
+    final targets = Environment.darwinArchs.map((arch) {
+      final target = Target.forDarwin(
+          platformName: Environment.darwinPlatformName, darwinAarch: arch);
+      if (target == null) {
+        throw Exception(
+            "Unknown darwin target or platform: $arch, ${Environment.darwinPlatformName}");
+      }
+      return target;
+    }).toList();
+
+    final environment = BuildEnvironment.fromEnvironment(isAndroid: false);
+    final provider =
+        ArtifactProvider(environment: environment, userOptions: userOptions);
+    final artifacts = await provider.getArtifacts(targets);
+
+    void performLipo(String targetFile, Iterable<String> sourceFiles) {
+      runCommand("lipo", [
+        '-create',
+        ...sourceFiles,
+        '-output',
+        targetFile,
+      ]);
+    }
+
+    final outputDir = Environment.outputDir;
+
+    Directory(outputDir).createSync(recursive: true);
+
+    final staticLibs = artifacts.values
+        .expand((element) => element)
+        .where((element) => element.type == AritifactType.staticlib)
+        .toList();
+    final dynamicLibs = artifacts.values
+        .expand((element) => element)
+        .where((element) => element.type == AritifactType.dylib)
+        .toList();
+
+    final libName = environment.crateInfo.packageName;
+
+    // If there is static lib, use it and link it with pod
+    if (staticLibs.isNotEmpty) {
+      final finalTargetFile = path.join(outputDir, "lib$libName.a");
+      performLipo(finalTargetFile, staticLibs.map((e) => e.path));
+    } else {
+      // Otherwise try to replace bundle dylib with our dylib
+      final bundlePaths = [
+        '$libName.framework/Versions/A/$libName',
+        '$libName.framework/$libName',
+      ];
+
+      for (final bundlePath in bundlePaths) {
+        final targetFile = path.join(outputDir, bundlePath);
+        if (File(targetFile).existsSync()) {
+          performLipo(targetFile, dynamicLibs.map((e) => e.path));
+
+          // Replace absolute id with @rpath one so that it works properly
+          // when moved to Frameworks.
+          runCommand("install_name_tool", [
+            '-id',
+            '@rpath/$bundlePath',
+            targetFile,
+          ]);
+          return;
+        }
+      }
+      throw Exception('Unable to find bundle for dynamic library');
+    }
+  }
+}

cargokit/build_tool/lib/src/build_tool.dart

@@ -0,0 +1,271 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+import 'dart:io';
+
+import 'package:args/command_runner.dart';
+import 'package:ed25519_edwards/ed25519_edwards.dart';
+import 'package:github/github.dart';
+import 'package:hex/hex.dart';
+import 'package:logging/logging.dart';
+
+import 'android_environment.dart';
+import 'build_cmake.dart';
+import 'build_gradle.dart';
+import 'build_pod.dart';
+import 'logging.dart';
+import 'options.dart';
+import 'precompile_binaries.dart';
+import 'target.dart';
+import 'util.dart';
+import 'verify_binaries.dart';
+
+final log = Logger('build_tool');
+
+abstract class BuildCommand extends Command {
+  Future<void> runBuildCommand(CargokitUserOptions options);
+
+  @override
+  Future<void> run() async {
+    final options = CargokitUserOptions.load();
+
+    if (options.verboseLogging ||
+        Platform.environment['CARGOKIT_VERBOSE'] == '1') {
+      enableVerboseLogging();
+    }
+
+    await runBuildCommand(options);
+  }
+}
+
+class BuildPodCommand extends BuildCommand {
+  @override
+  final name = 'build-pod';
+
+  @override
+  final description = 'Build cocoa pod library';
+
+  @override
+  Future<void> runBuildCommand(CargokitUserOptions options) async {
+    final build = BuildPod(userOptions: options);
+    await build.build();
+  }
+}
+
+class BuildGradleCommand extends BuildCommand {
+  @override
+  final name = 'build-gradle';
+
+  @override
+  final description = 'Build android library';
+
+  @override
+  Future<void> runBuildCommand(CargokitUserOptions options) async {
+    final build = BuildGradle(userOptions: options);
+    await build.build();
+  }
+}
+
+class BuildCMakeCommand extends BuildCommand {
+  @override
+  final name = 'build-cmake';
+
+  @override
+  final description = 'Build CMake library';
+
+  @override
+  Future<void> runBuildCommand(CargokitUserOptions options) async {
+    final build = BuildCMake(userOptions: options);
+    await build.build();
+  }
+}
+
+class GenKeyCommand extends Command {
+  @override
+  final name = 'gen-key';
+
+  @override
+  final description = 'Generate key pair for signing precompiled binaries';
+
+  @override
+  void run() {
+    final kp = generateKey();
+    final private = HEX.encode(kp.privateKey.bytes);
+    final public = HEX.encode(kp.publicKey.bytes);
+    print("Private Key: $private");
+    print("Public Key: $public");
+  }
+}
+
+class PrecompileBinariesCommand extends Command {
+  PrecompileBinariesCommand() {
+    argParser
+      ..addOption(
+        'repository',
+        mandatory: true,
+        help: 'Github repository slug in format owner/name',
+      )
+      ..addOption(
+        'manifest-dir',
+        mandatory: true,
+        help: 'Directory containing Cargo.toml',
+      )
+      ..addMultiOption('target',
+          help: 'Rust target triple of artifact to build.\n'
+              'Can be specified multiple times or omitted in which case\n'
+              'all targets for current platform will be built.')
+      ..addOption(
+        'android-sdk-location',
+        help: 'Location of Android SDK (if available)',
+      )
+      ..addOption(
+        'android-ndk-version',
+        help: 'Android NDK version (if available)',
+      )
+      ..addOption(
+        'android-min-sdk-version',
+        help: 'Android minimum rquired version (if available)',
+      )
+      ..addOption(
+        'temp-dir',
+        help: 'Directory to store temporary build artifacts',
+      )
+      ..addFlag(
+        "verbose",
+        abbr: "v",
+        defaultsTo: false,
+        help: "Enable verbose logging",
+      );
+  }
+
+  @override
+  final name = 'precompile-binaries';
+
+  @override
+  final description = 'Prebuild and upload binaries\n'
+      'Private key must be passed through PRIVATE_KEY environment variable. '
+      'Use gen_key through generate priave key.\n'
+      'Github token must be passed as GITHUB_TOKEN environment variable.\n';
+
+  @override
+  Future<void> run() async {
+    final verbose = argResults!['verbose'] as bool;
+    if (verbose) {
+      enableVerboseLogging();
+    }
+
+    final privateKeyString = Platform.environment['PRIVATE_KEY'];
+    if (privateKeyString == null) {
+      throw ArgumentError('Missing PRIVATE_KEY environment variable');
+    }
+    final githubToken = Platform.environment['GITHUB_TOKEN'];
+    if (githubToken == null) {
+      throw ArgumentError('Missing GITHUB_TOKEN environment variable');
+    }
+    final privateKey = HEX.decode(privateKeyString);
+    if (privateKey.length != 64) {
+      throw ArgumentError('Private key must be 64 bytes long');
+    }
+    final manifestDir = argResults!['manifest-dir'] as String;
+    if (!Directory(manifestDir).existsSync()) {
+      throw ArgumentError('Manifest directory does not exist: $manifestDir');
+    }
+    String? androidMinSdkVersionString =
+        argResults!['android-min-sdk-version'] as String?;
+    int? androidMinSdkVersion;
+    if (androidMinSdkVersionString != null) {
+      androidMinSdkVersion = int.tryParse(androidMinSdkVersionString);
+      if (androidMinSdkVersion == null) {
+        throw ArgumentError(
+            'Invalid android-min-sdk-version: $androidMinSdkVersionString');
+      }
+    }
+    final targetStrigns = argResults!['target'] as List<String>;
+    final targets = targetStrigns.map((target) {
+      final res = Target.forRustTriple(target);
+      if (res == null) {
+        throw ArgumentError('Invalid target: $target');
+      }
+      return res;
+    }).toList(growable: false);
+    final precompileBinaries = PrecompileBinaries(
+      privateKey: PrivateKey(privateKey),
+      githubToken: githubToken,
+      manifestDir: manifestDir,
+      repositorySlug: RepositorySlug.full(argResults!['repository'] as String),
+      targets: targets,
+      androidSdkLocation: argResults!['android-sdk-location'] as String?,
+      androidNdkVersion: argResults!['android-ndk-version'] as String?,
+      androidMinSdkVersion: androidMinSdkVersion,
+      tempDir: argResults!['temp-dir'] as String?,
+    );
+
+    await precompileBinaries.run();
+  }
+}
+
+class VerifyBinariesCommand extends Command {
+  VerifyBinariesCommand() {
+    argParser.addOption(
+      'manifest-dir',
+      mandatory: true,
+      help: 'Directory containing Cargo.toml',
+    );
+  }
+
+  @override
+  final name = "verify-binaries";
+
+  @override
+  final description = 'Verifies published binaries\n'
+      'Checks whether there is a binary published for each targets\n'
+      'and checks the signature.';
+
+  @override
+  Future<void> run() async {
+    final manifestDir = argResults!['manifest-dir'] as String;
+    final verifyBinaries = VerifyBinaries(
+      manifestDir: manifestDir,
+    );
+    await verifyBinaries.run();
+  }
+}
+
+Future<void> runMain(List<String> args) async {
+  try {
+    // Init logging before options are loaded
+    initLogging();
+
+    if (Platform.environment['_CARGOKIT_NDK_LINK_TARGET'] != null) {
+      return AndroidEnvironment.clangLinkerWrapper(args);
+    }
+
+    final runner = CommandRunner('build_tool', 'Cargokit built_tool')
+      ..addCommand(BuildPodCommand())
+      ..addCommand(BuildGradleCommand())
+      ..addCommand(BuildCMakeCommand())
+      ..addCommand(GenKeyCommand())
+      ..addCommand(PrecompileBinariesCommand())
+      ..addCommand(VerifyBinariesCommand());
+
+    await runner.run(args);
+  } on ArgumentError catch (e) {
+    stderr.writeln(e.toString());
+    exit(1);
+  } catch (e, s) {
+    log.severe(kDoubleSeparator);
+    log.severe('Cargokit BuildTool failed with error:');
+    log.severe(kSeparator);
+    log.severe(e);
+    // This tells user to install Rust, there's no need to pollute the log with
+    // stack trace.
+    if (e is! RustupNotFoundException) {
+      log.severe(kSeparator);
+      log.severe(s);
+      log.severe(kSeparator);
+      log.severe('BuildTool arguments: $args');
+    }
+    log.severe(kDoubleSeparator);
+    exit(1);
+  }
+}

cargokit/build_tool/lib/src/builder.dart

@@ -0,0 +1,198 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+import 'package:collection/collection.dart';
+import 'package:logging/logging.dart';
+import 'package:path/path.dart' as path;
+
+import 'android_environment.dart';
+import 'cargo.dart';
+import 'environment.dart';
+import 'options.dart';
+import 'rustup.dart';
+import 'target.dart';
+import 'util.dart';
+
+final _log = Logger('builder');
+
+enum BuildConfiguration {
+  debug,
+  release,
+  profile,
+}
+
+extension on BuildConfiguration {
+  bool get isDebug => this == BuildConfiguration.debug;
+  String get rustName => switch (this) {
+        BuildConfiguration.debug => 'debug',
+        BuildConfiguration.release => 'release',
+        BuildConfiguration.profile => 'release',
+      };
+}
+
+class BuildException implements Exception {
+  final String message;
+
+  BuildException(this.message);
+
+  @override
+  String toString() {
+    return 'BuildException: $message';
+  }
+}
+
+class BuildEnvironment {
+  final BuildConfiguration configuration;
+  final CargokitCrateOptions crateOptions;
+  final String targetTempDir;
+  final String manifestDir;
+  final CrateInfo crateInfo;
+
+  final bool isAndroid;
+  final String? androidSdkPath;
+  final String? androidNdkVersion;
+  final int? androidMinSdkVersion;
+  final String? javaHome;
+
+  BuildEnvironment({
+    required this.configuration,
+    required this.crateOptions,
+    required this.targetTempDir,
+    required this.manifestDir,
+    required this.crateInfo,
+    required this.isAndroid,
+    this.androidSdkPath,
+    this.androidNdkVersion,
+    this.androidMinSdkVersion,
+    this.javaHome,
+  });
+
+  static BuildConfiguration parseBuildConfiguration(String value) {
+    // XCode configuration adds the flavor to configuration name.
+    final firstSegment = value.split('-').first;
+    final buildConfiguration = BuildConfiguration.values.firstWhereOrNull(
+      (e) => e.name == firstSegment,
+    );
+    if (buildConfiguration == null) {
+      _log.warning('Unknown build configuraiton $value, will assume release');
+      return BuildConfiguration.release;
+    }
+    return buildConfiguration;
+  }
+
+  static BuildEnvironment fromEnvironment({
+    required bool isAndroid,
+  }) {
+    final buildConfiguration =
+        parseBuildConfiguration(Environment.configuration);
+    final manifestDir = Environment.manifestDir;
+    final crateOptions = CargokitCrateOptions.load(
+      manifestDir: manifestDir,
+    );
+    final crateInfo = CrateInfo.load(manifestDir);
+    return BuildEnvironment(
+      configuration: buildConfiguration,
+      crateOptions: crateOptions,
+      targetTempDir: Environment.targetTempDir,
+      manifestDir: manifestDir,
+      crateInfo: crateInfo,
+      isAndroid: isAndroid,
+      androidSdkPath: isAndroid ? Environment.sdkPath : null,
+      androidNdkVersion: isAndroid ? Environment.ndkVersion : null,
+      androidMinSdkVersion:
+          isAndroid ? int.parse(Environment.minSdkVersion) : null,
+      javaHome: isAndroid ? Environment.javaHome : null,
+    );
+  }
+}
+
+class RustBuilder {
+  final Target target;
+  final BuildEnvironment environment;
+
+  RustBuilder({
+    required this.target,
+    required this.environment,
+  });
+
+  void prepare(
+    Rustup rustup,
+  ) {
+    final toolchain = _toolchain;
+    if (rustup.installedTargets(toolchain) == null) {
+      rustup.installToolchain(toolchain);
+    }
+    if (toolchain == 'nightly') {
+      rustup.installRustSrcForNightly();
+    }
+    if (!rustup.installedTargets(toolchain)!.contains(target.rust)) {
+      rustup.installTarget(target.rust, toolchain: toolchain);
+    }
+  }
+
+  CargoBuildOptions? get _buildOptions =>
+      environment.crateOptions.cargo[environment.configuration];
+
+  String get _toolchain => _buildOptions?.toolchain.name ?? 'stable';
+
+  /// Returns the path of directory containing build artifacts.
+  Future<String> build() async {
+    final extraArgs = _buildOptions?.flags ?? [];
+    final manifestPath = path.join(environment.manifestDir, 'Cargo.toml');
+    runCommand(
+      'rustup',
+      [
+        'run',
+        _toolchain,
+        'cargo',
+        'build',
+        ...extraArgs,
+        '--manifest-path',
+        manifestPath,
+        '-p',
+        environment.crateInfo.packageName,
+        if (!environment.configuration.isDebug) '--release',
+        '--target',
+        target.rust,
+        '--target-dir',
+        environment.targetTempDir,
+      ],
+      environment: await _buildEnvironment(),
+    );
+    return path.join(
+      environment.targetTempDir,
+      target.rust,
+      environment.configuration.rustName,
+    );
+  }
+
+  Future<Map<String, String>> _buildEnvironment() async {
+    if (target.android == null) {
+      return {};
+    } else {
+      final sdkPath = environment.androidSdkPath;
+      final ndkVersion = environment.androidNdkVersion;
+      final minSdkVersion = environment.androidMinSdkVersion;
+      if (sdkPath == null) {
+        throw BuildException('androidSdkPath is not set');
+      }
+      if (ndkVersion == null) {
+        throw BuildException('androidNdkVersion is not set');
+      }
+      if (minSdkVersion == null) {
+        throw BuildException('androidMinSdkVersion is not set');
+      }
+      final env = AndroidEnvironment(
+        sdkPath: sdkPath,
+        ndkVersion: ndkVersion,
+        minSdkVersion: minSdkVersion,
+        targetTempDir: environment.targetTempDir,
+        target: target,
+      );
+      if (!env.ndkIsInstalled() && environment.javaHome != null) {
+        env.installNdk(javaHome: environment.javaHome!);
+      }
+      return env.buildEnvironment();
+    }
+  }
+}

cargokit/build_tool/lib/src/cargo.dart

@@ -0,0 +1,48 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+import 'dart:io';
+
+import 'package:path/path.dart' as path;
+import 'package:toml/toml.dart';
+
+class ManifestException {
+  ManifestException(this.message, {required this.fileName});
+
+  final String? fileName;
+  final String message;
+
+  @override
+  String toString() {
+    if (fileName != null) {
+      return 'Failed to parse package manifest at $fileName: $message';
+    } else {
+      return 'Failed to parse package manifest: $message';
+    }
+  }
+}
+
+class CrateInfo {
+  CrateInfo({required this.packageName});
+
+  final String packageName;
+
+  static CrateInfo parseManifest(String manifest, {final String? fileName}) {
+    final toml = TomlDocument.parse(manifest);
+    final package = toml.toMap()['package'];
+    if (package == null) {
+      throw ManifestException('Missing package section', fileName: fileName);
+    }
+    final name = package['name'];
+    if (name == null) {
+      throw ManifestException('Missing package name', fileName: fileName);
+    }
+    return CrateInfo(packageName: name);
+  }
+
+  static CrateInfo load(String manifestDir) {
+    final manifestFile = File(path.join(manifestDir, 'Cargo.toml'));
+    final manifest = manifestFile.readAsStringSync();
+    return parseManifest(manifest, fileName: manifestFile.path);
+  }
+}

cargokit/build_tool/lib/src/crate_hash.dart

@@ -0,0 +1,124 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+import 'dart:convert';
+import 'dart:io';
+import 'dart:typed_data';
+
+import 'package:collection/collection.dart';
+import 'package:convert/convert.dart';
+import 'package:crypto/crypto.dart';
+import 'package:path/path.dart' as path;
+
+class CrateHash {
+  /// Computes a hash uniquely identifying crate content. This takes into account
+  /// content all all .rs files inside the src directory, as well as Cargo.toml,
+  /// Cargo.lock, build.rs and cargokit.yaml.
+  ///
+  /// If [tempStorage] is provided, computed hash is stored in a file in that directory
+  /// and reused on subsequent calls if the crate content hasn't changed.
+  static String compute(String manifestDir, {String? tempStorage}) {
+    return CrateHash._(
+      manifestDir: manifestDir,
+      tempStorage: tempStorage,
+    )._compute();
+  }
+
+  CrateHash._({
+    required this.manifestDir,
+    required this.tempStorage,
+  });
+
+  String _compute() {
+    final files = getFiles();
+    final tempStorage = this.tempStorage;
+    if (tempStorage != null) {
+      final quickHash = _computeQuickHash(files);
+      final quickHashFolder = Directory(path.join(tempStorage, 'crate_hash'));
+      quickHashFolder.createSync(recursive: true);
+      final quickHashFile = File(path.join(quickHashFolder.path, quickHash));
+      if (quickHashFile.existsSync()) {
+        return quickHashFile.readAsStringSync();
+      }
+      final hash = _computeHash(files);
+      quickHashFile.writeAsStringSync(hash);
+      return hash;
+    } else {
+      return _computeHash(files);
+    }
+  }
+
+  /// Computes a quick hash based on files stat (without reading contents). This
+  /// is used to cache the real hash, which is slower to compute since it involves
+  /// reading every single file.
+  String _computeQuickHash(List<File> files) {
+    final output = AccumulatorSink<Digest>();
+    final input = sha256.startChunkedConversion(output);
+
+    final data = ByteData(8);
+    for (final file in files) {
+      input.add(utf8.encode(file.path));
+      final stat = file.statSync();
+      data.setUint64(0, stat.size);
+      input.add(data.buffer.asUint8List());
+      data.setUint64(0, stat.modified.millisecondsSinceEpoch);
+      input.add(data.buffer.asUint8List());
+    }
+
+    input.close();
+    return base64Url.encode(output.events.single.bytes);
+  }
+
+  String _computeHash(List<File> files) {
+    final output = AccumulatorSink<Digest>();
+    final input = sha256.startChunkedConversion(output);
+
+    void addTextFile(File file) {
+      // text Files are hashed by lines in case we're dealing with github checkout
+      // that auto-converts line endings.
+      final splitter = LineSplitter();
+      if (file.existsSync()) {
+        final data = file.readAsStringSync();
+        final lines = splitter.convert(data);
+        for (final line in lines) {
+          input.add(utf8.encode(line));
+        }
+      }
+    }
+
+    for (final file in files) {
+      addTextFile(file);
+    }
+
+    input.close();
+    final res = output.events.single;
+
+    // Truncate to 128bits.
+    final hash = res.bytes.sublist(0, 16);
+    return hex.encode(hash);
+  }
+
+  List<File> getFiles() {
+    final src = Directory(path.join(manifestDir, 'src'));
+    final files = src
+        .listSync(recursive: true, followLinks: false)
+        .whereType<File>()
+        .toList();
+    files.sortBy((element) => element.path);
+    void addFile(String relative) {
+      final file = File(path.join(manifestDir, relative));
+      if (file.existsSync()) {
+        files.add(file);
+      }
+    }
+
+    addFile('Cargo.toml');
+    addFile('Cargo.lock');
+    addFile('build.rs');
+    addFile('cargokit.yaml');
+    return files;
+  }
+
+  final String manifestDir;
+  final String? tempStorage;
+}

cargokit/build_tool/lib/src/environment.dart

@@ -0,0 +1,68 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+import 'dart:io';
+
+extension on String {
+  String resolveSymlink() => File(this).resolveSymbolicLinksSync();
+}
+
+class Environment {
+  /// Current build configuration (debug or release).
+  static String get configuration =>
+      _getEnv("CARGOKIT_CONFIGURATION").toLowerCase();
+
+  static bool get isDebug => configuration == 'debug';
+  static bool get isRelease => configuration == 'release';
+
+  /// Temporary directory where Rust build artifacts are placed.
+  static String get targetTempDir => _getEnv("CARGOKIT_TARGET_TEMP_DIR");
+
+  /// Final output directory where the build artifacts are placed.
+  static String get outputDir => _getEnvPath('CARGOKIT_OUTPUT_DIR');
+
+  /// Path to the crate manifest (containing Cargo.toml).
+  static String get manifestDir => _getEnvPath('CARGOKIT_MANIFEST_DIR');
+
+  /// Directory inside root project. Not necessarily root folder. Symlinks are
+  /// not resolved on purpose.
+  static String get rootProjectDir => _getEnv('CARGOKIT_ROOT_PROJECT_DIR');
+
+  // Pod
+
+  /// Platform name (macosx, iphoneos, iphonesimulator).
+  static String get darwinPlatformName =>
+      _getEnv("CARGOKIT_DARWIN_PLATFORM_NAME");
+
+  /// List of architectures to build for (arm64, armv7, x86_64).
+  static List<String> get darwinArchs =>
+      _getEnv("CARGOKIT_DARWIN_ARCHS").split(' ');
+
+  // Gradle
+  static String get minSdkVersion => _getEnv("CARGOKIT_MIN_SDK_VERSION");
+  static String get ndkVersion => _getEnv("CARGOKIT_NDK_VERSION");
+  static String get sdkPath => _getEnvPath("CARGOKIT_SDK_DIR");
+  static String get javaHome => _getEnvPath("CARGOKIT_JAVA_HOME");
+  static List<String> get targetPlatforms =>
+      _getEnv("CARGOKIT_TARGET_PLATFORMS").split(',');
+
+  // CMAKE
+  static String get targetPlatform => _getEnv("CARGOKIT_TARGET_PLATFORM");
+
+  static String _getEnv(String key) {
+    final res = Platform.environment[key];
+    if (res == null) {
+      throw Exception("Missing environment variable $key");
+    }
+    return res;
+  }
+
+  static String _getEnvPath(String key) {
+    final res = _getEnv(key);
+    if (Directory(res).existsSync()) {
+      return res.resolveSymlink();
+    } else {
+      return res;
+    }
+  }
+}

cargokit/build_tool/lib/src/logging.dart

@@ -0,0 +1,52 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+import 'dart:io';
+
+import 'package:logging/logging.dart';
+
+const String kSeparator = "--";
+const String kDoubleSeparator = "==";
+
+bool _lastMessageWasSeparator = false;
+
+void _log(LogRecord rec) {
+  final prefix = '${rec.level.name}: ';
+  final out = rec.level == Level.SEVERE ? stderr : stdout;
+  if (rec.message == kSeparator) {
+    if (!_lastMessageWasSeparator) {
+      out.write(prefix);
+      out.writeln('-' * 80);
+      _lastMessageWasSeparator = true;
+    }
+    return;
+  } else if (rec.message == kDoubleSeparator) {
+    out.write(prefix);
+    out.writeln('=' * 80);
+    _lastMessageWasSeparator = true;
+    return;
+  }
+  out.write(prefix);
+  out.writeln(rec.message);
+  _lastMessageWasSeparator = false;
+}
+
+void initLogging() {
+  Logger.root.level = Level.INFO;
+  Logger.root.onRecord.listen((LogRecord rec) {
+    final lines = rec.message.split('\n');
+    for (final line in lines) {
+      if (line.isNotEmpty || lines.length == 1 || line != lines.last) {
+        _log(LogRecord(
+          rec.level,
+          line,
+          rec.loggerName,
+        ));
+      }
+    }
+  });
+}
+
+void enableVerboseLogging() {
+  Logger.root.level = Level.ALL;
+}

cargokit/build_tool/lib/src/options.dart

@@ -0,0 +1,309 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+import 'dart:io';
+
+import 'package:collection/collection.dart';
+import 'package:ed25519_edwards/ed25519_edwards.dart';
+import 'package:hex/hex.dart';
+import 'package:logging/logging.dart';
+import 'package:path/path.dart' as path;
+import 'package:source_span/source_span.dart';
+import 'package:yaml/yaml.dart';
+
+import 'builder.dart';
+import 'environment.dart';
+import 'rustup.dart';
+
+final _log = Logger('options');
+
+/// A class for exceptions that have source span information attached.
+class SourceSpanException implements Exception {
+  // This is a getter so that subclasses can override it.
+  /// A message describing the exception.
+  String get message => _message;
+  final String _message;
+
+  // This is a getter so that subclasses can override it.
+  /// The span associated with this exception.
+  ///
+  /// This may be `null` if the source location can't be determined.
+  SourceSpan? get span => _span;
+  final SourceSpan? _span;
+
+  SourceSpanException(this._message, this._span);
+
+  /// Returns a string representation of `this`.
+  ///
+  /// [color] may either be a [String], a [bool], or `null`. If it's a string,
+  /// it indicates an ANSI terminal color escape that should be used to
+  /// highlight the span's text. If it's `true`, it indicates that the text
+  /// should be highlighted using the default color. If it's `false` or `null`,
+  /// it indicates that the text shouldn't be highlighted.
+  @override
+  String toString({Object? color}) {
+    if (span == null) return message;
+    return 'Error on ${span!.message(message, color: color)}';
+  }
+}
+
+enum Toolchain {
+  stable,
+  beta,
+  nightly,
+}
+
+class CargoBuildOptions {
+  final Toolchain toolchain;
+  final List<String> flags;
+
+  CargoBuildOptions({
+    required this.toolchain,
+    required this.flags,
+  });
+
+  static Toolchain _toolchainFromNode(YamlNode node) {
+    if (node case YamlScalar(value: String name)) {
+      final toolchain =
+          Toolchain.values.firstWhereOrNull((element) => element.name == name);
+      if (toolchain != null) {
+        return toolchain;
+      }
+    }
+    throw SourceSpanException(
+        'Unknown toolchain. Must be one of ${Toolchain.values.map((e) => e.name)}.',
+        node.span);
+  }
+
+  static CargoBuildOptions parse(YamlNode node) {
+    if (node is! YamlMap) {
+      throw SourceSpanException('Cargo options must be a map', node.span);
+    }
+    Toolchain toolchain = Toolchain.stable;
+    List<String> flags = [];
+    for (final MapEntry(:key, :value) in node.nodes.entries) {
+      if (key case YamlScalar(value: 'toolchain')) {
+        toolchain = _toolchainFromNode(value);
+      } else if (key case YamlScalar(value: 'extra_flags')) {
+        if (value case YamlList(nodes: List<YamlNode> list)) {
+          if (list.every((element) {
+            if (element case YamlScalar(value: String _)) {
+              return true;
+            }
+            return false;
+          })) {
+            flags = list.map((e) => e.value as String).toList();
+            continue;
+          }
+        }
+        throw SourceSpanException(
+            'Extra flags must be a list of strings', value.span);
+      } else {
+        throw SourceSpanException(
+            'Unknown cargo option type. Must be "toolchain" or "extra_flags".',
+            key.span);
+      }
+    }
+    return CargoBuildOptions(toolchain: toolchain, flags: flags);
+  }
+}
+
+extension on YamlMap {
+  /// Map that extracts keys so that we can do map case check on them.
+  Map<dynamic, YamlNode> get valueMap =>
+      nodes.map((key, value) => MapEntry(key.value, value));
+}
+
+class PrecompiledBinaries {
+  final String uriPrefix;
+  final PublicKey publicKey;
+
+  PrecompiledBinaries({
+    required this.uriPrefix,
+    required this.publicKey,
+  });
+
+  static PublicKey _publicKeyFromHex(String key, SourceSpan? span) {
+    final bytes = HEX.decode(key);
+    if (bytes.length != 32) {
+      throw SourceSpanException(
+          'Invalid public key. Must be 32 bytes long.', span);
+    }
+    return PublicKey(bytes);
+  }
+
+  static PrecompiledBinaries parse(YamlNode node) {
+    if (node case YamlMap(valueMap: Map<dynamic, YamlNode> map)) {
+      if (map
+          case {
+            'url_prefix': YamlNode urlPrefixNode,
+            'public_key': YamlNode publicKeyNode,
+          }) {
+        final urlPrefix = switch (urlPrefixNode) {
+          YamlScalar(value: String urlPrefix) => urlPrefix,
+          _ => throw SourceSpanException(
+              'Invalid URL prefix value.', urlPrefixNode.span),
+        };
+        final publicKey = switch (publicKeyNode) {
+          YamlScalar(value: String publicKey) =>
+            _publicKeyFromHex(publicKey, publicKeyNode.span),
+          _ => throw SourceSpanException(
+              'Invalid public key value.', publicKeyNode.span),
+        };
+        return PrecompiledBinaries(
+          uriPrefix: urlPrefix,
+          publicKey: publicKey,
+        );
+      }
+    }
+    throw SourceSpanException(
+        'Invalid precompiled binaries value. '
+        'Expected Map with "url_prefix" and "public_key".',
+        node.span);
+  }
+}
+
+/// Cargokit options specified for Rust crate.
+class CargokitCrateOptions {
+  CargokitCrateOptions({
+    this.cargo = const {},
+    this.precompiledBinaries,
+  });
+
+  final Map<BuildConfiguration, CargoBuildOptions> cargo;
+  final PrecompiledBinaries? precompiledBinaries;
+
+  static CargokitCrateOptions parse(YamlNode node) {
+    if (node is! YamlMap) {
+      throw SourceSpanException('Cargokit options must be a map', node.span);
+    }
+    final options = <BuildConfiguration, CargoBuildOptions>{};
+    PrecompiledBinaries? precompiledBinaries;
+
+    for (final entry in node.nodes.entries) {
+      if (entry
+          case MapEntry(
+            key: YamlScalar(value: 'cargo'),
+            value: YamlNode node,
+          )) {
+        if (node is! YamlMap) {
+          throw SourceSpanException('Cargo options must be a map', node.span);
+        }
+        for (final MapEntry(:YamlNode key, :value) in node.nodes.entries) {
+          if (key case YamlScalar(value: String name)) {
+            final configuration = BuildConfiguration.values
+                .firstWhereOrNull((element) => element.name == name);
+            if (configuration != null) {
+              options[configuration] = CargoBuildOptions.parse(value);
+              continue;
+            }
+          }
+          throw SourceSpanException(
+              'Unknown build configuration. Must be one of ${BuildConfiguration.values.map((e) => e.name)}.',
+              key.span);
+        }
+      } else if (entry.key case YamlScalar(value: 'precompiled_binaries')) {
+        precompiledBinaries = PrecompiledBinaries.parse(entry.value);
+      } else {
+        throw SourceSpanException(
+            'Unknown cargokit option type. Must be "cargo" or "precompiled_binaries".',
+            entry.key.span);
+      }
+    }
+    return CargokitCrateOptions(
+      cargo: options,
+      precompiledBinaries: precompiledBinaries,
+    );
+  }
+
+  static CargokitCrateOptions load({
+    required String manifestDir,
+  }) {
+    final uri = Uri.file(path.join(manifestDir, "cargokit.yaml"));
+    final file = File.fromUri(uri);
+    if (file.existsSync()) {
+      final contents = loadYamlNode(file.readAsStringSync(), sourceUrl: uri);
+      return parse(contents);
+    } else {
+      return CargokitCrateOptions();
+    }
+  }
+}
+
+class CargokitUserOptions {
+  // When Rustup is installed always build locally unless user opts into
+  // using precompiled binaries.
+  static bool defaultUsePrecompiledBinaries() {
+    return Rustup.executablePath() == null;
+  }
+
+  CargokitUserOptions({
+    required this.usePrecompiledBinaries,
+    required this.verboseLogging,
+  });
+
+  CargokitUserOptions._()
+      : usePrecompiledBinaries = defaultUsePrecompiledBinaries(),
+        verboseLogging = false;
+
+  static CargokitUserOptions parse(YamlNode node) {
+    if (node is! YamlMap) {
+      throw SourceSpanException('Cargokit options must be a map', node.span);
+    }
+    bool usePrecompiledBinaries = defaultUsePrecompiledBinaries();
+    bool verboseLogging = false;
+
+    for (final entry in node.nodes.entries) {
+      if (entry.key case YamlScalar(value: 'use_precompiled_binaries')) {
+        if (entry.value case YamlScalar(value: bool value)) {
+          usePrecompiledBinaries = value;
+          continue;
+        }
+        throw SourceSpanException(
+            'Invalid value for "use_precompiled_binaries". Must be a boolean.',
+            entry.value.span);
+      } else if (entry.key case YamlScalar(value: 'verbose_logging')) {
+        if (entry.value case YamlScalar(value: bool value)) {
+          verboseLogging = value;
+          continue;
+        }
+        throw SourceSpanException(
+            'Invalid value for "verbose_logging". Must be a boolean.',
+            entry.value.span);
+      } else {
+        throw SourceSpanException(
+            'Unknown cargokit option type. Must be "use_precompiled_binaries" or "verbose_logging".',
+            entry.key.span);
+      }
+    }
+    return CargokitUserOptions(
+      usePrecompiledBinaries: usePrecompiledBinaries,
+      verboseLogging: verboseLogging,
+    );
+  }
+
+  static CargokitUserOptions load() {
+    String fileName = "cargokit_options.yaml";
+    var userProjectDir = Directory(Environment.rootProjectDir);
+
+    while (userProjectDir.parent.path != userProjectDir.path) {
+      final configFile = File(path.join(userProjectDir.path, fileName));
+      if (configFile.existsSync()) {
+        final contents = loadYamlNode(
+          configFile.readAsStringSync(),
+          sourceUrl: configFile.uri,
+        );
+        final res = parse(contents);
+        if (res.verboseLogging) {
+          _log.info('Found user options file at ${configFile.path}');
+        }
+        return res;
+      }
+      userProjectDir = userProjectDir.parent;
+    }
+    return CargokitUserOptions._();
+  }
+
+  final bool usePrecompiledBinaries;
+  final bool verboseLogging;
+}

cargokit/build_tool/lib/src/precompile_binaries.dart

@@ -0,0 +1,202 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+import 'dart:io';
+
+import 'package:ed25519_edwards/ed25519_edwards.dart';
+import 'package:github/github.dart';
+import 'package:logging/logging.dart';
+import 'package:path/path.dart' as path;
+
+import 'artifacts_provider.dart';
+import 'builder.dart';
+import 'cargo.dart';
+import 'crate_hash.dart';
+import 'options.dart';
+import 'rustup.dart';
+import 'target.dart';
+
+final _log = Logger('precompile_binaries');
+
+class PrecompileBinaries {
+  PrecompileBinaries({
+    required this.privateKey,
+    required this.githubToken,
+    required this.repositorySlug,
+    required this.manifestDir,
+    required this.targets,
+    this.androidSdkLocation,
+    this.androidNdkVersion,
+    this.androidMinSdkVersion,
+    this.tempDir,
+  });
+
+  final PrivateKey privateKey;
+  final String githubToken;
+  final RepositorySlug repositorySlug;
+  final String manifestDir;
+  final List<Target> targets;
+  final String? androidSdkLocation;
+  final String? androidNdkVersion;
+  final int? androidMinSdkVersion;
+  final String? tempDir;
+
+  static String fileName(Target target, String name) {
+    return '${target.rust}_$name';
+  }
+
+  static String signatureFileName(Target target, String name) {
+    return '${target.rust}_$name.sig';
+  }
+
+  Future<void> run() async {
+    final crateInfo = CrateInfo.load(manifestDir);
+
+    final targets = List.of(this.targets);
+    if (targets.isEmpty) {
+      targets.addAll([
+        ...Target.buildableTargets(),
+        if (androidSdkLocation != null) ...Target.androidTargets(),
+      ]);
+    }
+
+    _log.info('Precompiling binaries for $targets');
+
+    final hash = CrateHash.compute(manifestDir);
+    _log.info('Computed crate hash: $hash');
+
+    final String tagName = 'precompiled_$hash';
+
+    final github = GitHub(auth: Authentication.withToken(githubToken));
+    final repo = github.repositories;
+    final release = await _getOrCreateRelease(
+      repo: repo,
+      tagName: tagName,
+      packageName: crateInfo.packageName,
+      hash: hash,
+    );
+
+    final tempDir = this.tempDir != null
+        ? Directory(this.tempDir!)
+        : Directory.systemTemp.createTempSync('precompiled_');
+
+    tempDir.createSync(recursive: true);
+
+    final crateOptions = CargokitCrateOptions.load(
+      manifestDir: manifestDir,
+    );
+
+    final buildEnvironment = BuildEnvironment(
+      configuration: BuildConfiguration.release,
+      crateOptions: crateOptions,
+      targetTempDir: tempDir.path,
+      manifestDir: manifestDir,
+      crateInfo: crateInfo,
+      isAndroid: androidSdkLocation != null,
+      androidSdkPath: androidSdkLocation,
+      androidNdkVersion: androidNdkVersion,
+      androidMinSdkVersion: androidMinSdkVersion,
+    );
+
+    final rustup = Rustup();
+
+    for (final target in targets) {
+      final artifactNames = getArtifactNames(
+        target: target,
+        libraryName: crateInfo.packageName,
+        remote: true,
+      );
+
+      if (artifactNames.every((name) {
+        final fileName = PrecompileBinaries.fileName(target, name);
+        return (release.assets ?? []).any((e) => e.name == fileName);
+      })) {
+        _log.info("All artifacts for $target already exist - skipping");
+        continue;
+      }
+
+      _log.info('Building for $target');
+
+      final builder =
+          RustBuilder(target: target, environment: buildEnvironment);
+      builder.prepare(rustup);
+      final res = await builder.build();
+
+      final assets = <CreateReleaseAsset>[];
+      for (final name in artifactNames) {
+        final file = File(path.join(res, name));
+        if (!file.existsSync()) {
+          throw Exception('Missing artifact: ${file.path}');
+        }
+
+        final data = file.readAsBytesSync();
+        final create = CreateReleaseAsset(
+          name: PrecompileBinaries.fileName(target, name),
+          contentType: "application/octet-stream",
+          assetData: data,
+        );
+        final signature = sign(privateKey, data);
+        final signatureCreate = CreateReleaseAsset(
+          name: signatureFileName(target, name),
+          contentType: "application/octet-stream",
+          assetData: signature,
+        );
+        bool verified = verify(public(privateKey), data, signature);
+        if (!verified) {
+          throw Exception('Signature verification failed');
+        }
+        assets.add(create);
+        assets.add(signatureCreate);
+      }
+      _log.info('Uploading assets: ${assets.map((e) => e.name)}');
+      for (final asset in assets) {
+        // This seems to be failing on CI so do it one by one
+        int retryCount = 0;
+        while (true) {
+          try {
+            await repo.uploadReleaseAssets(release, [asset]);
+            break;
+          } on Exception catch (e) {
+            if (retryCount == 10) {
+              rethrow;
+            }
+            ++retryCount;
+            _log.shout(
+                'Upload failed (attempt $retryCount, will retry): ${e.toString()}');
+            await Future.delayed(Duration(seconds: 2));
+          }
+        }
+      }
+    }
+
+    _log.info('Cleaning up');
+    tempDir.deleteSync(recursive: true);
+  }
+
+  Future<Release> _getOrCreateRelease({
+    required RepositoriesService repo,
+    required String tagName,
+    required String packageName,
+    required String hash,
+  }) async {
+    Release release;
+    try {
+      _log.info('Fetching release $tagName');
+      release = await repo.getReleaseByTagName(repositorySlug, tagName);
+    } on ReleaseNotFound {
+      _log.info('Release not found - creating release $tagName');
+      release = await repo.createRelease(
+          repositorySlug,
+          CreateRelease.from(
+            tagName: tagName,
+            name: 'Precompiled binaries ${hash.substring(0, 8)}',
+            targetCommitish: null,
+            isDraft: false,
+            isPrerelease: false,
+            body: 'Precompiled binaries for crate $packageName, '
+                'crate hash $hash.',
+          ));
+    }
+    return release;
+  }
+}

cargokit/build_tool/lib/src/rustup.dart

@@ -0,0 +1,136 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+import 'dart:io';
+
+import 'package:collection/collection.dart';
+import 'package:path/path.dart' as path;
+
+import 'util.dart';
+
+class _Toolchain {
+  _Toolchain(
+    this.name,
+    this.targets,
+  );
+
+  final String name;
+  final List<String> targets;
+}
+
+class Rustup {
+  List<String>? installedTargets(String toolchain) {
+    final targets = _installedTargets(toolchain);
+    return targets != null ? List.unmodifiable(targets) : null;
+  }
+
+  void installToolchain(String toolchain) {
+    log.info("Installing Rust toolchain: $toolchain");
+    runCommand("rustup", ['toolchain', 'install', toolchain]);
+    _installedToolchains
+        .add(_Toolchain(toolchain, _getInstalledTargets(toolchain)));
+  }
+
+  void installTarget(
+    String target, {
+    required String toolchain,
+  }) {
+    log.info("Installing Rust target: $target");
+    runCommand("rustup", [
+      'target',
+      'add',
+      '--toolchain',
+      toolchain,
+      target,
+    ]);
+    _installedTargets(toolchain)?.add(target);
+  }
+
+  final List<_Toolchain> _installedToolchains;
+
+  Rustup() : _installedToolchains = _getInstalledToolchains();
+
+  List<String>? _installedTargets(String toolchain) => _installedToolchains
+      .firstWhereOrNull(
+          (e) => e.name == toolchain || e.name.startsWith('$toolchain-'))
+      ?.targets;
+
+  static List<_Toolchain> _getInstalledToolchains() {
+    String extractToolchainName(String line) {
+      // ignore (default) after toolchain name
+      final parts = line.split(' ');
+      return parts[0];
+    }
+
+    final res = runCommand("rustup", ['toolchain', 'list']);
+
+    // To list all non-custom toolchains, we need to filter out lines that
+    // don't start with "stable", "beta", or "nightly".
+    Pattern nonCustom = RegExp(r"^(stable|beta|nightly)");
+    final lines = res.stdout
+        .toString()
+        .split('\n')
+        .where((e) => e.isNotEmpty && e.startsWith(nonCustom))
+        .map(extractToolchainName)
+        .toList(growable: true);
+
+    return lines
+        .map(
+          (name) => _Toolchain(
+            name,
+            _getInstalledTargets(name),
+          ),
+        )
+        .toList(growable: true);
+  }
+
+  static List<String> _getInstalledTargets(String toolchain) {
+    final res = runCommand("rustup", [
+      'target',
+      'list',
+      '--toolchain',
+      toolchain,
+      '--installed',
+    ]);
+    final lines = res.stdout
+        .toString()
+        .split('\n')
+        .where((e) => e.isNotEmpty)
+        .toList(growable: true);
+    return lines;
+  }
+
+  bool _didInstallRustSrcForNightly = false;
+
+  void installRustSrcForNightly() {
+    if (_didInstallRustSrcForNightly) {
+      return;
+    }
+    // Useful for -Z build-std
+    runCommand(
+      "rustup",
+      ['component', 'add', 'rust-src', '--toolchain', 'nightly'],
+    );
+    _didInstallRustSrcForNightly = true;
+  }
+
+  static String? executablePath() {
+    final envPath = Platform.environment['PATH'];
+    final envPathSeparator = Platform.isWindows ? ';' : ':';
+    final home = Platform.isWindows
+        ? Platform.environment['USERPROFILE']
+        : Platform.environment['HOME'];
+    final paths = [
+      if (home != null) path.join(home, '.cargo', 'bin'),
+      if (envPath != null) ...envPath.split(envPathSeparator),
+    ];
+    for (final p in paths) {
+      final rustup = Platform.isWindows ? 'rustup.exe' : 'rustup';
+      final rustupPath = path.join(p, rustup);
+      if (File(rustupPath).existsSync()) {
+        return rustupPath;
+      }
+    }
+    return null;
+  }
+}

cargokit/build_tool/lib/src/target.dart

@@ -0,0 +1,140 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+import 'dart:io';
+
+import 'package:collection/collection.dart';
+
+import 'util.dart';
+
+class Target {
+  Target({
+    required this.rust,
+    this.flutter,
+    this.android,
+    this.androidMinSdkVersion,
+    this.darwinPlatform,
+    this.darwinArch,
+  });
+
+  static final all = [
+    Target(
+      rust: 'armv7-linux-androideabi',
+      flutter: 'android-arm',
+      android: 'armeabi-v7a',
+      androidMinSdkVersion: 16,
+    ),
+    Target(
+      rust: 'aarch64-linux-android',
+      flutter: 'android-arm64',
+      android: 'arm64-v8a',
+      androidMinSdkVersion: 21,
+    ),
+    Target(
+      rust: 'i686-linux-android',
+      flutter: 'android-x86',
+      android: 'x86',
+      androidMinSdkVersion: 16,
+    ),
+    Target(
+      rust: 'x86_64-linux-android',
+      flutter: 'android-x64',
+      android: 'x86_64',
+      androidMinSdkVersion: 21,
+    ),
+    Target(
+      rust: 'x86_64-pc-windows-msvc',
+      flutter: 'windows-x64',
+    ),
+    Target(
+      rust: 'x86_64-unknown-linux-gnu',
+      flutter: 'linux-x64',
+    ),
+    Target(
+      rust: 'aarch64-unknown-linux-gnu',
+      flutter: 'linux-arm64',
+    ),
+    Target(
+      rust: 'x86_64-apple-darwin',
+      darwinPlatform: 'macosx',
+      darwinArch: 'x86_64',
+    ),
+    Target(
+      rust: 'aarch64-apple-darwin',
+      darwinPlatform: 'macosx',
+      darwinArch: 'arm64',
+    ),
+    Target(
+      rust: 'aarch64-apple-ios',
+      darwinPlatform: 'iphoneos',
+      darwinArch: 'arm64',
+    ),
+    Target(
+      rust: 'aarch64-apple-ios-sim',
+      darwinPlatform: 'iphonesimulator',
+      darwinArch: 'arm64',
+    ),
+    Target(
+      rust: 'x86_64-apple-ios',
+      darwinPlatform: 'iphonesimulator',
+      darwinArch: 'x86_64',
+    ),
+  ];
+
+  static Target? forFlutterName(String flutterName) {
+    return all.firstWhereOrNull((element) => element.flutter == flutterName);
+  }
+
+  static Target? forDarwin({
+    required String platformName,
+    required String darwinAarch,
+  }) {
+    return all.firstWhereOrNull((element) => //
+        element.darwinPlatform == platformName &&
+        element.darwinArch == darwinAarch);
+  }
+
+  static Target? forRustTriple(String triple) {
+    return all.firstWhereOrNull((element) => element.rust == triple);
+  }
+
+  static List<Target> androidTargets() {
+    return all
+        .where((element) => element.android != null)
+        .toList(growable: false);
+  }
+
+  /// Returns buildable targets on current host platform ignoring Android targets.
+  static List<Target> buildableTargets() {
+    if (Platform.isLinux) {
+      // Right now we don't support cross-compiling on Linux. So we just return
+      // the host target.
+      final arch = runCommand('arch', []).stdout as String;
+      if (arch.trim() == 'aarch64') {
+        return [Target.forRustTriple('aarch64-unknown-linux-gnu')!];
+      } else {
+        return [Target.forRustTriple('x86_64-unknown-linux-gnu')!];
+      }
+    }
+    return all.where((target) {
+      if (Platform.isWindows) {
+        return target.rust.contains('-windows-');
+      } else if (Platform.isMacOS) {
+        return target.darwinPlatform != null;
+      }
+      return false;
+    }).toList(growable: false);
+  }
+
+  @override
+  String toString() {
+    return rust;
+  }
+
+  final String? flutter;
+  final String rust;
+  final String? android;
+  final int? androidMinSdkVersion;
+  final String? darwinPlatform;
+  final String? darwinArch;
+}

cargokit/build_tool/lib/src/util.dart

@@ -0,0 +1,172 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:logging/logging.dart';
+import 'package:path/path.dart' as path;
+
+import 'logging.dart';
+import 'rustup.dart';
+
+final log = Logger("process");
+
+class CommandFailedException implements Exception {
+  final String executable;
+  final List<String> arguments;
+  final ProcessResult result;
+
+  CommandFailedException({
+    required this.executable,
+    required this.arguments,
+    required this.result,
+  });
+
+  @override
+  String toString() {
+    final stdout = result.stdout.toString().trim();
+    final stderr = result.stderr.toString().trim();
+    return [
+      "External Command: $executable ${arguments.map((e) => '"$e"').join(' ')}",
+      "Returned Exit Code: ${result.exitCode}",
+      kSeparator,
+      "STDOUT:",
+      if (stdout.isNotEmpty) stdout,
+      kSeparator,
+      "STDERR:",
+      if (stderr.isNotEmpty) stderr,
+    ].join('\n');
+  }
+}
+
+class TestRunCommandArgs {
+  final String executable;
+  final List<String> arguments;
+  final String? workingDirectory;
+  final Map<String, String>? environment;
+  final bool includeParentEnvironment;
+  final bool runInShell;
+  final Encoding? stdoutEncoding;
+  final Encoding? stderrEncoding;
+
+  TestRunCommandArgs({
+    required this.executable,
+    required this.arguments,
+    this.workingDirectory,
+    this.environment,
+    this.includeParentEnvironment = true,
+    this.runInShell = false,
+    this.stdoutEncoding,
+    this.stderrEncoding,
+  });
+}
+
+class TestRunCommandResult {
+  TestRunCommandResult({
+    this.pid = 1,
+    this.exitCode = 0,
+    this.stdout = '',
+    this.stderr = '',
+  });
+
+  final int pid;
+  final int exitCode;
+  final String stdout;
+  final String stderr;
+}
+
+TestRunCommandResult Function(TestRunCommandArgs args)? testRunCommandOverride;
+
+ProcessResult runCommand(
+  String executable,
+  List<String> arguments, {
+  String? workingDirectory,
+  Map<String, String>? environment,
+  bool includeParentEnvironment = true,
+  bool runInShell = false,
+  Encoding? stdoutEncoding = systemEncoding,
+  Encoding? stderrEncoding = systemEncoding,
+}) {
+  if (testRunCommandOverride != null) {
+    final result = testRunCommandOverride!(TestRunCommandArgs(
+      executable: executable,
+      arguments: arguments,
+      workingDirectory: workingDirectory,
+      environment: environment,
+      includeParentEnvironment: includeParentEnvironment,
+      runInShell: runInShell,
+      stdoutEncoding: stdoutEncoding,
+      stderrEncoding: stderrEncoding,
+    ));
+    return ProcessResult(
+      result.pid,
+      result.exitCode,
+      result.stdout,
+      result.stderr,
+    );
+  }
+  log.finer('Running command $executable ${arguments.join(' ')}');
+  final res = Process.runSync(
+    _resolveExecutable(executable),
+    arguments,
+    workingDirectory: workingDirectory,
+    environment: environment,
+    includeParentEnvironment: includeParentEnvironment,
+    runInShell: runInShell,
+    stderrEncoding: stderrEncoding,
+    stdoutEncoding: stdoutEncoding,
+  );
+  if (res.exitCode != 0) {
+    throw CommandFailedException(
+      executable: executable,
+      arguments: arguments,
+      result: res,
+    );
+  } else {
+    return res;
+  }
+}
+
+class RustupNotFoundException implements Exception {
+  @override
+  String toString() {
+    return [
+      ' ',
+      'rustup not found in PATH.',
+      ' ',
+      'Maybe you need to install Rust? It only takes a minute:',
+      ' ',
+      if (Platform.isWindows) 'https://www.rust-lang.org/tools/install',
+      if (hasHomebrewRustInPath()) ...[
+        '\$ brew unlink rust # Unlink homebrew Rust from PATH',
+      ],
+      if (!Platform.isWindows)
+        "\$ curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh",
+      ' ',
+    ].join('\n');
+  }
+
+  static bool hasHomebrewRustInPath() {
+    if (!Platform.isMacOS) {
+      return false;
+    }
+    final envPath = Platform.environment['PATH'] ?? '';
+    final paths = envPath.split(':');
+    return paths.any((p) {
+      return p.contains('homebrew') && File(path.join(p, 'rustc')).existsSync();
+    });
+  }
+}
+
+String _resolveExecutable(String executable) {
+  if (executable == 'rustup') {
+    final resolved = Rustup.executablePath();
+    if (resolved != null) {
+      return resolved;
+    }
+    throw RustupNotFoundException();
+  } else {
+    return executable;
+  }
+}

cargokit/build_tool/lib/src/verify_binaries.dart

@@ -0,0 +1,84 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+import 'dart:io';
+
+import 'package:ed25519_edwards/ed25519_edwards.dart';
+import 'package:http/http.dart';
+
+import 'artifacts_provider.dart';
+import 'cargo.dart';
+import 'crate_hash.dart';
+import 'options.dart';
+import 'precompile_binaries.dart';
+import 'target.dart';
+
+class VerifyBinaries {
+  VerifyBinaries({
+    required this.manifestDir,
+  });
+
+  final String manifestDir;
+
+  Future<void> run() async {
+    final crateInfo = CrateInfo.load(manifestDir);
+
+    final config = CargokitCrateOptions.load(manifestDir: manifestDir);
+    final precompiledBinaries = config.precompiledBinaries;
+    if (precompiledBinaries == null) {
+      stdout.writeln('Crate does not support precompiled binaries.');
+    } else {
+      final crateHash = CrateHash.compute(manifestDir);
+      stdout.writeln('Crate hash: $crateHash');
+
+      for (final target in Target.all) {
+        final message = 'Checking ${target.rust}...';
+        stdout.write(message.padRight(40));
+        stdout.flush();
+
+        final artifacts = getArtifactNames(
+          target: target,
+          libraryName: crateInfo.packageName,
+          remote: true,
+        );
+
+        final prefix = precompiledBinaries.uriPrefix;
+
+        bool ok = true;
+
+        for (final artifact in artifacts) {
+          final fileName = PrecompileBinaries.fileName(target, artifact);
+          final signatureFileName =
+              PrecompileBinaries.signatureFileName(target, artifact);
+
+          final url = Uri.parse('$prefix$crateHash/$fileName');
+          final signatureUrl =
+              Uri.parse('$prefix$crateHash/$signatureFileName');
+
+          final signature = await get(signatureUrl);
+          if (signature.statusCode != 200) {
+            stdout.writeln('MISSING');
+            ok = false;
+            break;
+          }
+          final asset = await get(url);
+          if (asset.statusCode != 200) {
+            stdout.writeln('MISSING');
+            ok = false;
+            break;
+          }
+
+          if (!verify(precompiledBinaries.publicKey, asset.bodyBytes,
+              signature.bodyBytes)) {
+            stdout.writeln('INVALID SIGNATURE');
+            ok = false;
+          }
+        }
+
+        if (ok) {
+          stdout.writeln('OK');
+        }
+      }
+    }
+  }
+}

cargokit/build_tool/pubspec.lock

@@ -0,0 +1,453 @@
+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  _fe_analyzer_shared:
+    dependency: transitive
+    description:
+      name: _fe_analyzer_shared
+      sha256: eb376e9acf6938204f90eb3b1f00b578640d3188b4c8a8ec054f9f479af8d051
+      url: "https://pub.dev"
+    source: hosted
+    version: "64.0.0"
+  adaptive_number:
+    dependency: transitive
+    description:
+      name: adaptive_number
+      sha256: "3a567544e9b5c9c803006f51140ad544aedc79604fd4f3f2c1380003f97c1d77"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.0"
+  analyzer:
+    dependency: transitive
+    description:
+      name: analyzer
+      sha256: "69f54f967773f6c26c7dcb13e93d7ccee8b17a641689da39e878d5cf13b06893"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.2.0"
+  args:
+    dependency: "direct main"
+    description:
+      name: args
+      sha256: eef6c46b622e0494a36c5a12d10d77fb4e855501a91c1b9ef9339326e58f0596
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.2"
+  async:
+    dependency: transitive
+    description:
+      name: async
+      sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.11.0"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      sha256: "6cfb5af12253eaf2b368f07bacc5a80d1301a071c73360d746b7f2e32d762c66"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
+  collection:
+    dependency: "direct main"
+    description:
+      name: collection
+      sha256: ee67cb0715911d28db6bf4af1026078bd6f0128b07a5f66fb2ed94ec6783c09a
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.18.0"
+  convert:
+    dependency: "direct main"
+    description:
+      name: convert
+      sha256: "0f08b14755d163f6e2134cb58222dd25ea2a2ee8a195e53983d57c075324d592"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.1"
+  coverage:
+    dependency: transitive
+    description:
+      name: coverage
+      sha256: "2fb815080e44a09b85e0f2ca8a820b15053982b2e714b59267719e8a9ff17097"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.6.3"
+  crypto:
+    dependency: "direct main"
+    description:
+      name: crypto
+      sha256: ff625774173754681d66daaf4a448684fb04b78f902da9cb3d308c19cc5e8bab
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.3"
+  ed25519_edwards:
+    dependency: "direct main"
+    description:
+      name: ed25519_edwards
+      sha256: "6ce0112d131327ec6d42beede1e5dfd526069b18ad45dcf654f15074ad9276cd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.3.1"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      sha256: "1b92bec4fc2a72f59a8e15af5f52cd441e4a7860b49499d69dfa817af20e925d"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.1.4"
+  fixnum:
+    dependency: transitive
+    description:
+      name: fixnum
+      sha256: "25517a4deb0c03aa0f32fd12db525856438902d9c16536311e76cdc57b31d7d1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
+  frontend_server_client:
+    dependency: transitive
+    description:
+      name: frontend_server_client
+      sha256: "408e3ca148b31c20282ad6f37ebfa6f4bdc8fede5b74bc2f08d9d92b55db3612"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.0"
+  github:
+    dependency: "direct main"
+    description:
+      name: github
+      sha256: "9966bc13bf612342e916b0a343e95e5f046c88f602a14476440e9b75d2295411"
+      url: "https://pub.dev"
+    source: hosted
+    version: "9.17.0"
+  glob:
+    dependency: transitive
+    description:
+      name: glob
+      sha256: "0e7014b3b7d4dac1ca4d6114f82bf1782ee86745b9b42a92c9289c23d8a0ab63"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.2"
+  hex:
+    dependency: "direct main"
+    description:
+      name: hex
+      sha256: "4e7cd54e4b59ba026432a6be2dd9d96e4c5205725194997193bf871703b82c4a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.0"
+  http:
+    dependency: "direct main"
+    description:
+      name: http
+      sha256: "759d1a329847dd0f39226c688d3e06a6b8679668e350e2891a6474f8b4bb8525"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
+  http_multi_server:
+    dependency: transitive
+    description:
+      name: http_multi_server
+      sha256: "97486f20f9c2f7be8f514851703d0119c3596d14ea63227af6f7a481ef2b2f8b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.1"
+  http_parser:
+    dependency: transitive
+    description:
+      name: http_parser
+      sha256: "2aa08ce0341cc9b354a498388e30986515406668dbcc4f7c950c3e715496693b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.2"
+  io:
+    dependency: transitive
+    description:
+      name: io
+      sha256: "2ec25704aba361659e10e3e5f5d672068d332fc8ac516421d483a11e5cbd061e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.4"
+  js:
+    dependency: transitive
+    description:
+      name: js
+      sha256: f2c445dce49627136094980615a031419f7f3eb393237e4ecd97ac15dea343f3
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.6.7"
+  json_annotation:
+    dependency: transitive
+    description:
+      name: json_annotation
+      sha256: b10a7b2ff83d83c777edba3c6a0f97045ddadd56c944e1a23a3fdf43a1bf4467
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.8.1"
+  lints:
+    dependency: "direct dev"
+    description:
+      name: lints
+      sha256: "0a217c6c989d21039f1498c3ed9f3ed71b354e69873f13a8dfc3c9fe76f1b452"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
+  logging:
+    dependency: "direct main"
+    description:
+      name: logging
+      sha256: "623a88c9594aa774443aa3eb2d41807a48486b5613e67599fb4c41c0ad47c340"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.0"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      sha256: "1803e76e6653768d64ed8ff2e1e67bea3ad4b923eb5c56a295c3e634bad5960e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.12.16"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      sha256: "3c74dbf8763d36539f114c799d8a2d87343b5067e9d796ca22b5eb8437090ee3"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.9.1"
+  mime:
+    dependency: transitive
+    description:
+      name: mime
+      sha256: e4ff8e8564c03f255408decd16e7899da1733852a9110a58fe6d1b817684a63e
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.4"
+  node_preamble:
+    dependency: transitive
+    description:
+      name: node_preamble
+      sha256: "6e7eac89047ab8a8d26cf16127b5ed26de65209847630400f9aefd7cd5c730db"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.2"
+  package_config:
+    dependency: transitive
+    description:
+      name: package_config
+      sha256: "1c5b77ccc91e4823a5af61ee74e6b972db1ef98c2ff5a18d3161c982a55448bd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.0"
+  path:
+    dependency: "direct main"
+    description:
+      name: path
+      sha256: "2ad4cddff7f5cc0e2d13069f2a3f7a73ca18f66abd6f5ecf215219cdb3638edb"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.8.0"
+  petitparser:
+    dependency: transitive
+    description:
+      name: petitparser
+      sha256: cb3798bef7fc021ac45b308f4b51208a152792445cce0448c9a4ba5879dd8750
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.4.0"
+  pool:
+    dependency: transitive
+    description:
+      name: pool
+      sha256: "20fe868b6314b322ea036ba325e6fc0711a22948856475e2c2b6306e8ab39c2a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.5.1"
+  pub_semver:
+    dependency: transitive
+    description:
+      name: pub_semver
+      sha256: "40d3ab1bbd474c4c2328c91e3a7df8c6dd629b79ece4c4bd04bee496a224fb0c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.4"
+  shelf:
+    dependency: transitive
+    description:
+      name: shelf
+      sha256: ad29c505aee705f41a4d8963641f91ac4cee3c8fad5947e033390a7bd8180fa4
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.1"
+  shelf_packages_handler:
+    dependency: transitive
+    description:
+      name: shelf_packages_handler
+      sha256: "89f967eca29607c933ba9571d838be31d67f53f6e4ee15147d5dc2934fee1b1e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.2"
+  shelf_static:
+    dependency: transitive
+    description:
+      name: shelf_static
+      sha256: a41d3f53c4adf0f57480578c1d61d90342cd617de7fc8077b1304643c2d85c1e
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.2"
+  shelf_web_socket:
+    dependency: transitive
+    description:
+      name: shelf_web_socket
+      sha256: "9ca081be41c60190ebcb4766b2486a7d50261db7bd0f5d9615f2d653637a84c1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.4"
+  source_map_stack_trace:
+    dependency: transitive
+    description:
+      name: source_map_stack_trace
+      sha256: "84cf769ad83aa6bb61e0aa5a18e53aea683395f196a6f39c4c881fb90ed4f7ae"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
+  source_maps:
+    dependency: transitive
+    description:
+      name: source_maps
+      sha256: "708b3f6b97248e5781f493b765c3337db11c5d2c81c3094f10904bfa8004c703"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.10.12"
+  source_span:
+    dependency: "direct main"
+    description:
+      name: source_span
+      sha256: "53e943d4206a5e30df338fd4c6e7a077e02254531b138a15aec3bd143c1a8b3c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.10.0"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      sha256: "73713990125a6d93122541237550ee3352a2d84baad52d375a4cad2eb9b7ce0b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.11.1"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      sha256: ba2aa5d8cc609d96bbb2899c28934f9e1af5cddbd60a827822ea467161eb54e7
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.2"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      sha256: "556692adab6cfa87322a115640c11f13cb77b3f076ddcc5d6ae3c20242bedcde"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.0"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      sha256: a29248a84fbb7c79282b40b8c72a1209db169a2e0542bce341da992fe1bc7e84
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.1"
+  test:
+    dependency: "direct dev"
+    description:
+      name: test
+      sha256: "9b0dd8e36af4a5b1569029949d50a52cb2a2a2fdaa20cebb96e6603b9ae241f9"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.24.6"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      sha256: "5c2f730018264d276c20e4f1503fd1308dfbbae39ec8ee63c5236311ac06954b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.6.1"
+  test_core:
+    dependency: transitive
+    description:
+      name: test_core
+      sha256: "4bef837e56375537055fdbbbf6dd458b1859881f4c7e6da936158f77d61ab265"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.5.6"
+  toml:
+    dependency: "direct main"
+    description:
+      name: toml
+      sha256: "157c5dca5160fced243f3ce984117f729c788bb5e475504f3dbcda881accee44"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.14.0"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      sha256: facc8d6582f16042dd49f2463ff1bd6e2c9ef9f3d5da3d9b087e244a7b564b3c
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.3.2"
+  version:
+    dependency: "direct main"
+    description:
+      name: version
+      sha256: "2307e23a45b43f96469eeab946208ed63293e8afca9c28cd8b5241ff31c55f55"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.0"
+  vm_service:
+    dependency: transitive
+    description:
+      name: vm_service
+      sha256: "0fae432c85c4ea880b33b497d32824b97795b04cdaa74d270219572a1f50268d"
+      url: "https://pub.dev"
+    source: hosted
+    version: "11.9.0"
+  watcher:
+    dependency: transitive
+    description:
+      name: watcher
+      sha256: "3d2ad6751b3c16cf07c7fca317a1413b3f26530319181b37e3b9039b84fc01d8"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
+  web_socket_channel:
+    dependency: transitive
+    description:
+      name: web_socket_channel
+      sha256: d88238e5eac9a42bb43ca4e721edba3c08c6354d4a53063afaa568516217621b
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.0"
+  webkit_inspection_protocol:
+    dependency: transitive
+    description:
+      name: webkit_inspection_protocol
+      sha256: "67d3a8b6c79e1987d19d848b0892e582dbb0c66c57cc1fef58a177dd2aa2823d"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.0"
+  yaml:
+    dependency: "direct main"
+    description:
+      name: yaml
+      sha256: "75769501ea3489fca56601ff33454fe45507ea3bfb014161abc3b43ae25989d5"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.2"
+sdks:
+  dart: ">=3.0.0 <4.0.0"

cargokit/build_tool/pubspec.yaml

@@ -0,0 +1,33 @@
+# This is copied from Cargokit (which is the official way to use it currently)
+# Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+name: build_tool
+description: Cargokit build_tool. Facilitates the build of Rust crate during Flutter application build.
+publish_to: none
+version: 1.0.0
+
+environment:
+  sdk: ">=3.0.0 <4.0.0"
+
+# Add regular dependencies here.
+dependencies:
+  # these are pinned on purpose because the bundle_tool_runner doesn't have
+  # pubspec.lock. See run_build_tool.sh
+  logging: 1.2.0
+  path: 1.8.0
+  version: 3.0.0
+  collection: 1.18.0
+  ed25519_edwards: 0.3.1
+  hex: 0.2.0
+  yaml: 3.1.2
+  source_span: 1.10.0
+  github: 9.17.0
+  args: 2.4.2
+  crypto: 3.0.3
+  convert: 3.1.1
+  http: 1.1.0
+  toml: 0.14.0
+
+dev_dependencies:
+  lints: ^2.1.0
+  test: ^1.24.0

cargokit/cmake/cargokit.cmake

@@ -0,0 +1,99 @@
+SET(cargokit_cmake_root "${CMAKE_CURRENT_LIST_DIR}/..")
+
+# Workaround for https://github.com/dart-lang/pub/issues/4010
+get_filename_component(cargokit_cmake_root "${cargokit_cmake_root}" REALPATH)
+
+if(WIN32)
+    # REALPATH does not properly resolve symlinks on windows :-/
+    execute_process(COMMAND powershell -ExecutionPolicy Bypass -File "${CMAKE_CURRENT_LIST_DIR}/resolve_symlinks.ps1" "${cargokit_cmake_root}" OUTPUT_VARIABLE cargokit_cmake_root OUTPUT_STRIP_TRAILING_WHITESPACE)
+endif()
+
+# Arguments
+# - target: CMAKE target to which rust library is linked
+# - manifest_dir: relative path from current folder to directory containing cargo manifest
+# - lib_name: cargo package name
+# - any_symbol_name: name of any exported symbol from the library.
+#                    used on windows to force linking with library.
+function(apply_cargokit target manifest_dir lib_name any_symbol_name)
+
+    set(CARGOKIT_LIB_NAME "${lib_name}")
+    set(CARGOKIT_LIB_FULL_NAME "${CMAKE_SHARED_MODULE_PREFIX}${CARGOKIT_LIB_NAME}${CMAKE_SHARED_MODULE_SUFFIX}")
+    if (CMAKE_CONFIGURATION_TYPES)
+        set(CARGOKIT_OUTPUT_DIR "${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>")
+        set(OUTPUT_LIB "${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>/${CARGOKIT_LIB_FULL_NAME}")
+    else()
+        set(CARGOKIT_OUTPUT_DIR "${CMAKE_CURRENT_BINARY_DIR}")
+        set(OUTPUT_LIB "${CMAKE_CURRENT_BINARY_DIR}/${CARGOKIT_LIB_FULL_NAME}")
+    endif()
+    set(CARGOKIT_TEMP_DIR "${CMAKE_CURRENT_BINARY_DIR}/cargokit_build")
+
+    if (FLUTTER_TARGET_PLATFORM)
+        set(CARGOKIT_TARGET_PLATFORM "${FLUTTER_TARGET_PLATFORM}")
+    else()
+        set(CARGOKIT_TARGET_PLATFORM "windows-x64")
+    endif()
+
+    set(CARGOKIT_ENV
+        "CARGOKIT_CMAKE=${CMAKE_COMMAND}"
+        "CARGOKIT_CONFIGURATION=$<CONFIG>"
+        "CARGOKIT_MANIFEST_DIR=${CMAKE_CURRENT_SOURCE_DIR}/${manifest_dir}"
+        "CARGOKIT_TARGET_TEMP_DIR=${CARGOKIT_TEMP_DIR}"
+        "CARGOKIT_OUTPUT_DIR=${CARGOKIT_OUTPUT_DIR}"
+        "CARGOKIT_TARGET_PLATFORM=${CARGOKIT_TARGET_PLATFORM}"
+        "CARGOKIT_TOOL_TEMP_DIR=${CARGOKIT_TEMP_DIR}/tool"
+        "CARGOKIT_ROOT_PROJECT_DIR=${CMAKE_SOURCE_DIR}"
+    )
+
+    if (WIN32)
+        set(SCRIPT_EXTENSION ".cmd")
+        set(IMPORT_LIB_EXTENSION ".lib")
+    else()
+        set(SCRIPT_EXTENSION ".sh")
+        set(IMPORT_LIB_EXTENSION "")
+        execute_process(COMMAND chmod +x "${cargokit_cmake_root}/run_build_tool${SCRIPT_EXTENSION}")
+    endif()
+
+    # Using generators in custom command is only supported in CMake 3.20+
+    if (CMAKE_CONFIGURATION_TYPES AND ${CMAKE_VERSION} VERSION_LESS "3.20.0")
+        foreach(CONFIG IN LISTS CMAKE_CONFIGURATION_TYPES)
+            add_custom_command(
+                OUTPUT
+                "${CMAKE_CURRENT_BINARY_DIR}/${CONFIG}/${CARGOKIT_LIB_FULL_NAME}"
+                "${CMAKE_CURRENT_BINARY_DIR}/_phony_"
+                COMMAND ${CMAKE_COMMAND} -E env ${CARGOKIT_ENV}
+                "${cargokit_cmake_root}/run_build_tool${SCRIPT_EXTENSION}" build-cmake
+                VERBATIM
+            )
+        endforeach()
+    else()
+        add_custom_command(
+            OUTPUT
+            ${OUTPUT_LIB}
+            "${CMAKE_CURRENT_BINARY_DIR}/_phony_"
+            COMMAND ${CMAKE_COMMAND} -E env ${CARGOKIT_ENV}
+            "${cargokit_cmake_root}/run_build_tool${SCRIPT_EXTENSION}" build-cmake
+            VERBATIM
+        )
+    endif()
+
+
+    set_source_files_properties("${CMAKE_CURRENT_BINARY_DIR}/_phony_" PROPERTIES SYMBOLIC TRUE)
+
+    if (TARGET ${target})
+        # If we have actual cmake target provided create target and make existing
+        # target depend on it
+        add_custom_target("${target}_cargokit" DEPENDS ${OUTPUT_LIB})
+        add_dependencies("${target}" "${target}_cargokit")
+        target_link_libraries("${target}" PRIVATE "${OUTPUT_LIB}${IMPORT_LIB_EXTENSION}")
+        if(WIN32)
+            target_link_options(${target} PRIVATE "/INCLUDE:${any_symbol_name}")
+        endif()
+    else()
+        # Otherwise (FFI) just use ALL to force building always
+        add_custom_target("${target}_cargokit" ALL DEPENDS ${OUTPUT_LIB})
+    endif()
+
+    # Allow adding the output library to plugin bundled libraries
+    set("${target}_cargokit_lib" ${OUTPUT_LIB} PARENT_SCOPE)
+
+endfunction()

cargokit/cmake/resolve_symlinks.ps1

@@ -0,0 +1,34 @@
+function Resolve-Symlinks {
+    [CmdletBinding()]
+    [OutputType([string])]
+    param(
+        [Parameter(Position = 0, Mandatory, ValueFromPipeline, ValueFromPipelineByPropertyName)]
+        [string] $Path
+    )
+
+    [string] $separator = '/'
+    [string[]] $parts = $Path.Split($separator)
+
+    [string] $realPath = ''
+    foreach ($part in $parts) {
+        if ($realPath -and !$realPath.EndsWith($separator)) {
+            $realPath += $separator
+        }
+
+        $realPath += $part.Replace('\', '/')
+
+        # The slash is important when using Get-Item on Drive letters in pwsh.
+        if (-not($realPath.Contains($separator)) -and $realPath.EndsWith(':')) {
+            $realPath += '/'
+        }
+
+        $item = Get-Item $realPath
+        if ($item.LinkTarget) {
+            $realPath = $item.LinkTarget.Replace('\', '/')
+        }
+    }
+    $realPath
+}
+
+$path = Resolve-Symlinks -Path $args[0]
+Write-Host $path

cargokit/gradle/plugin.gradle

@@ -0,0 +1,179 @@
+/// This is copied from Cargokit (which is the official way to use it currently)
+/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+
+import java.nio.file.Paths
+import org.apache.tools.ant.taskdefs.condition.Os
+
+CargoKitPlugin.file = buildscript.sourceFile
+
+apply plugin: CargoKitPlugin
+
+class CargoKitExtension {
+    String manifestDir; // Relative path to folder containing Cargo.toml
+    String libname; // Library name within Cargo.toml. Must be a cdylib
+}
+
+abstract class CargoKitBuildTask extends DefaultTask {
+
+    @Input
+    String buildMode
+
+    @Input
+    String buildDir
+
+    @Input
+    String outputDir
+
+    @Input
+    String ndkVersion
+
+    @Input
+    String sdkDirectory
+
+    @Input
+    int compileSdkVersion;
+
+    @Input
+    int minSdkVersion;
+
+    @Input
+    String pluginFile
+
+    @Input
+    List<String> targetPlatforms
+
+    @TaskAction
+    def build() {
+        if (project.cargokit.manifestDir == null) {
+            throw new GradleException("Property 'manifestDir' must be set on cargokit extension");
+        }
+
+        if (project.cargokit.libname == null) {
+            throw new GradleException("Property 'libname' must be set on cargokit extension");
+        }
+
+        def executableName = Os.isFamily(Os.FAMILY_WINDOWS) ? "run_build_tool.cmd" : "run_build_tool.sh"
+        def path = Paths.get(new File(pluginFile).parent, "..", executableName);
+
+        def manifestDir = Paths.get(project.buildscript.sourceFile.parent, project.cargokit.manifestDir)
+
+        def rootProjectDir = project.rootProject.projectDir
+
+        if (!Os.isFamily(Os.FAMILY_WINDOWS)) {
+            project.exec {
+                commandLine 'chmod', '+x', path
+            }
+        }
+
+        project.exec {
+            executable path
+            args "build-gradle"
+            environment "CARGOKIT_ROOT_PROJECT_DIR", rootProjectDir
+            environment "CARGOKIT_TOOL_TEMP_DIR", "${buildDir}/build_tool"
+            environment "CARGOKIT_MANIFEST_DIR", manifestDir
+            environment "CARGOKIT_CONFIGURATION", buildMode
+            environment "CARGOKIT_TARGET_TEMP_DIR", buildDir
+            environment "CARGOKIT_OUTPUT_DIR", outputDir
+            environment "CARGOKIT_NDK_VERSION", ndkVersion
+            environment "CARGOKIT_SDK_DIR", sdkDirectory
+            environment "CARGOKIT_COMPILE_SDK_VERSION", compileSdkVersion
+            environment "CARGOKIT_MIN_SDK_VERSION", minSdkVersion
+            environment "CARGOKIT_TARGET_PLATFORMS", targetPlatforms.join(",")
+            environment "CARGOKIT_JAVA_HOME", System.properties['java.home']
+        }
+    }
+}
+
+class CargoKitPlugin implements Plugin<Project> {
+
+    static String file;
+
+    private Plugin findFlutterPlugin(Project rootProject) {
+        _findFlutterPlugin(rootProject.childProjects)
+    }
+
+   private Plugin _findFlutterPlugin(Map projects) {
+        for (project in projects) {
+            for (plugin in project.value.getPlugins()) {
+                if (plugin.class.name == "com.flutter.gradle.FlutterPlugin") {
+                    return plugin;
+                }
+            }
+            def plugin = _findFlutterPlugin(project.value.childProjects);
+            if (plugin != null) {
+                return plugin;
+            }
+        }
+        return null;
+    }
+
+    @Override
+    void apply(Project project) {
+        def plugin = findFlutterPlugin(project.rootProject);
+
+        project.extensions.create("cargokit", CargoKitExtension)
+
+        if (plugin == null) {
+            print("Flutter plugin not found, CargoKit plugin will not be applied.")
+            return;
+        }
+
+        def cargoBuildDir = "${project.buildDir}/build"
+
+        // Determine if the project is an application or library
+        def isApplication = plugin.project.plugins.hasPlugin('com.android.application')
+        def variants = isApplication ? plugin.project.android.applicationVariants : plugin.project.android.libraryVariants
+
+        variants.all { variant ->
+
+            final buildType = variant.buildType.name
+
+            def cargoOutputDir = "${project.buildDir}/jniLibs/${buildType}";
+            def jniLibs = project.android.sourceSets.maybeCreate(buildType).jniLibs;
+            jniLibs.srcDir(new File(cargoOutputDir))
+
+            def platforms = com.flutter.gradle.FlutterPluginUtils.getTargetPlatforms(project).collect()
+
+            // Same thing addFlutterDependencies does in flutter.gradle
+            if (buildType == "debug") {
+                platforms.add("android-x86")
+                platforms.add("android-x64")
+            }
+
+            // The task name depends on plugin properties, which are not available
+            // at this point
+            project.getGradle().afterProject {
+                def taskName = "cargokitCargoBuild${project.cargokit.libname.capitalize()}${buildType.capitalize()}";
+
+                if (project.tasks.findByName(taskName)) {
+                    return
+                }
+
+                if (plugin.project.android.ndkVersion == null) {
+                    throw new GradleException("Please set 'android.ndkVersion' in 'app/build.gradle'.")
+                }
+
+                def task = project.tasks.create(taskName, CargoKitBuildTask.class) {
+                    buildMode = variant.buildType.name
+                    buildDir = cargoBuildDir
+                    outputDir = cargoOutputDir
+                    ndkVersion = plugin.project.android.ndkVersion
+                    sdkDirectory = plugin.project.android.sdkDirectory
+                    minSdkVersion = plugin.project.android.defaultConfig.minSdkVersion.apiLevel as int
+                    compileSdkVersion = plugin.project.android.compileSdkVersion.substring(8) as int
+                    targetPlatforms = platforms
+                    pluginFile = CargoKitPlugin.file
+                }
+                def onTask = { newTask ->
+                    if (newTask.name == "merge${buildType.capitalize()}NativeLibs") {
+                        newTask.dependsOn task
+                        // Fix gradle 7.4.2 not picking up JNI library changes
+                        newTask.outputs.upToDateWhen { false }
+                    }
+                }
+                project.tasks.each onTask
+                project.tasks.whenTaskAdded onTask
+            }
+        }
+    }
+}

cargokit/run_build_tool.cmd

@@ -0,0 +1,91 @@
+@echo off
+setlocal
+
+setlocal ENABLEDELAYEDEXPANSION
+
+SET BASEDIR=%~dp0
+
+if not exist "%CARGOKIT_TOOL_TEMP_DIR%" (
+    mkdir "%CARGOKIT_TOOL_TEMP_DIR%"
+)
+cd /D "%CARGOKIT_TOOL_TEMP_DIR%"
+
+SET BUILD_TOOL_PKG_DIR=%BASEDIR%build_tool
+SET DART=%FLUTTER_ROOT%\bin\cache\dart-sdk\bin\dart
+
+set BUILD_TOOL_PKG_DIR_POSIX=%BUILD_TOOL_PKG_DIR:\=/%
+
+(
+    echo name: build_tool_runner
+    echo version: 1.0.0
+    echo publish_to: none
+    echo.
+    echo environment:
+    echo   sdk: '^>=3.0.0 ^<4.0.0'
+    echo.
+    echo dependencies:
+    echo   build_tool:
+    echo     path: %BUILD_TOOL_PKG_DIR_POSIX%
+) >pubspec.yaml
+
+if not exist bin (
+    mkdir bin
+)
+
+(
+    echo import 'package:build_tool/build_tool.dart' as build_tool;
+    echo void main^(List^<String^> args^) ^{
+    echo    build_tool.runMain^(args^);
+    echo ^}
+) >bin\build_tool_runner.dart
+
+SET PRECOMPILED=bin\build_tool_runner.dill
+
+REM To detect changes in package we compare output of DIR /s (recursive)
+set PREV_PACKAGE_INFO=.dart_tool\package_info.prev
+set CUR_PACKAGE_INFO=.dart_tool\package_info.cur
+
+DIR "%BUILD_TOOL_PKG_DIR%" /s > "%CUR_PACKAGE_INFO%_orig"
+
+REM Last line in dir output is free space on harddrive. That is bound to
+REM change between invocation so we need to remove it
+(
+    Set "Line="
+    For /F "UseBackQ Delims=" %%A In ("%CUR_PACKAGE_INFO%_orig") Do (
+        SetLocal EnableDelayedExpansion
+        If Defined Line Echo !Line!
+        EndLocal
+        Set "Line=%%A")
+) >"%CUR_PACKAGE_INFO%"
+DEL "%CUR_PACKAGE_INFO%_orig"
+
+REM Compare current directory listing with previous
+FC /B "%CUR_PACKAGE_INFO%" "%PREV_PACKAGE_INFO%" > nul 2>&1
+
+If %ERRORLEVEL% neq 0 (
+    REM Changed - copy current to previous and remove precompiled kernel
+    if exist "%PREV_PACKAGE_INFO%" (
+        DEL "%PREV_PACKAGE_INFO%"
+    )
+    MOVE /Y "%CUR_PACKAGE_INFO%" "%PREV_PACKAGE_INFO%"
+    if exist "%PRECOMPILED%" (
+        DEL "%PRECOMPILED%"
+    )
+)
+
+REM There is no CUR_PACKAGE_INFO it was renamed in previous step to %PREV_PACKAGE_INFO%
+REM which means  we need to do pub get and precompile
+if not exist "%PRECOMPILED%" (
+    echo Running pub get in "%cd%"
+    "%DART%" pub get --no-precompile
+    "%DART%" compile kernel bin/build_tool_runner.dart
+)
+
+"%DART%" "%PRECOMPILED%" %*
+
+REM 253 means invalid snapshot version.
+If %ERRORLEVEL% equ 253 (
+    "%DART%" pub get --no-precompile
+    "%DART%" compile kernel bin/build_tool_runner.dart
+    "%DART%" "%PRECOMPILED%" %*
+)

cargokit/run_build_tool.sh

@@ -0,0 +1,99 @@
+#!/usr/bin/env bash
+
+set -e
+
+BASEDIR=$(dirname "$0")
+
+mkdir -p "$CARGOKIT_TOOL_TEMP_DIR"
+
+cd "$CARGOKIT_TOOL_TEMP_DIR"
+
+# Write a very simple bin package in temp folder that depends on build_tool package
+# from Cargokit. This is done to ensure that we don't pollute Cargokit folder
+# with .dart_tool contents.
+
+BUILD_TOOL_PKG_DIR="$BASEDIR/build_tool"
+
+if [[ -z $FLUTTER_ROOT ]]; then # not defined
+  DART=dart
+else
+  DART="$FLUTTER_ROOT/bin/cache/dart-sdk/bin/dart"
+fi
+
+cat << EOF > "pubspec.yaml"
+name: build_tool_runner
+version: 1.0.0
+publish_to: none
+
+environment:
+  sdk: '>=3.0.0 <4.0.0'
+
+dependencies:
+  build_tool:
+    path: "$BUILD_TOOL_PKG_DIR"
+EOF
+
+mkdir -p "bin"
+
+cat << EOF > "bin/build_tool_runner.dart"
+import 'package:build_tool/build_tool.dart' as build_tool;
+void main(List<String> args) {
+  build_tool.runMain(args);
+}
+EOF
+
+# Create alias for `shasum` if it does not exist and `sha1sum` exists
+if ! [ -x "$(command -v shasum)" ] && [ -x "$(command -v sha1sum)" ]; then
+  shopt -s expand_aliases
+  alias shasum="sha1sum"
+fi
+
+# Dart run will not cache any package that has a path dependency, which
+# is the case for our build_tool_runner. So instead we precompile the package
+# ourselves.
+# To invalidate the cached kernel we use the hash of ls -LR of the build_tool
+# package directory. This should be good enough, as the build_tool package
+# itself is not meant to have any path dependencies.
+
+if [[ "$OSTYPE" == "darwin"* ]]; then
+  PACKAGE_HASH=$(ls -lTR "$BUILD_TOOL_PKG_DIR" | shasum)
+else
+  PACKAGE_HASH=$(ls -lR --full-time "$BUILD_TOOL_PKG_DIR" | shasum)
+fi
+
+PACKAGE_HASH_FILE=".package_hash"
+
+if [ -f "$PACKAGE_HASH_FILE" ]; then
+    EXISTING_HASH=$(cat "$PACKAGE_HASH_FILE")
+    if [ "$PACKAGE_HASH" != "$EXISTING_HASH" ]; then
+        rm "$PACKAGE_HASH_FILE"
+    fi
+fi
+
+# Run pub get if needed.
+if [ ! -f "$PACKAGE_HASH_FILE" ]; then
+    "$DART" pub get --no-precompile
+    "$DART" compile kernel bin/build_tool_runner.dart
+    echo "$PACKAGE_HASH" > "$PACKAGE_HASH_FILE"
+fi
+
+# Rebuild the tool if it was deleted by Android Studio
+if [ ! -f "bin/build_tool_runner.dill" ]; then
+  "$DART" compile kernel bin/build_tool_runner.dart
+fi
+
+set +e
+
+"$DART" bin/build_tool_runner.dill "$@"
+
+exit_code=$?
+
+# 253 means invalid snapshot version.
+if [ $exit_code == 253 ]; then
+  "$DART" pub get --no-precompile
+  "$DART" compile kernel bin/build_tool_runner.dart
+  "$DART" bin/build_tool_runner.dill "$@"
+  exit_code=$?
+fi
+
+exit $exit_code

docs/README_DEV.rst

@@ -0,0 +1,49 @@
+
+
+
+FRB v2
+======
+With flutter_rust_bridge, the Rust dependency lives in Cargo.toml, not pubspec.yaml
+
+FRB v2 ships with Cargokit — a build helper that hooks into each platform's build 
+system (Gradle, Xcode, CMake) and compiles the Rust crate automatically at flutter build time. 
+This means:
+  * ccc_rust does not need a pubspec.yaml
+  * ccc_rust stays a pure Rust crate
+  * The current lum_ccc_rust entry in pubspec.yaml would be removed — it moves to rust/Cargo.toml
+
+::
+
+  ccc_dart_plugin/
+  ├── pubspec.yaml          ← NO reference to ccc_rust here
+  ├── rust/
+  │   ├── Cargo.toml        ← ccc_rust referenced HERE as a Rust crate dep
+  │   └── src/api.rs        ← thin wrappers calling ccc_rust
+
+
+ccc_rust
+========
+The Rust crypto library remains a pure Rust crate with no Flutter or FFI-specific code.
+Option 1: Build from source via Cargokit (recommended for development)
+  * The Rust crate references ccc_rust via a git tag in Cargo.toml
+  * Cargokit compiles the Rust code at build time for each platform
+  * No precompiled binaries are needed
+
+Option 2: Cargokit precompiled binaries via GitHub Releases (recommended for pub.dev)
+  * The Rust crate is compiled into platform-specific binaries (staticlib for iOS/macOS, cdylib for Android)
+  * Binaries are uploaded to GitHub Releases
+  * Cargokit fetches the correct binary at build time based on the target platform
+  * This allows pub.dev users to get native performance without needing Rust or a build environment
+
+
+Workflow
+--------
+* CI builds the Rust crate for all 5 platform targets
+* CI uploads the .so/.dylib/.dll/.framework to a GitHub Release tagged with the Cargo package hash
+* When consumers run flutter build, Cargokit downloads the precompiled binary instead of compiling
+* If no precompiled binary exists, it falls back to source build
+* Pros: Fast builds for consumers, no Rust toolchain needed, no repo bloat, built into FRB, single repo
+* Cons: Requires CI pipeline to build + upload binaries
+* Best for: pub.dev releases, distributing to teams without Rust installed
+
+

docs/ccc_fplugin_architecture_design.rst

@@ -1,9 +1,9 @@
 CCC Dart Plugin — Architecture & Integration Guide
 ====================================================
 
-:Status: Milestone 2 (Planned)  
+:Status: Milestone 2 (In Progress)  
-:Depends on: ``ccc_rust`` ≥ v0.1.0  
+:Depends on: ``ccc_rust`` ≥ v0.1.0 (ready)  
-:Target: Flutter (iOS, Android, macOS)  
+:Target: Flutter (iOS, Android, macOS, Linux, Windows)  
 :Bridge: ``flutter_rust_bridge`` v2  
 
 Overview
@@ -23,7 +23,7 @@ This repository contains:
 
 * A small Rust bridge crate referencing ``ccc_rust`` via a git tag
 * Generated ``flutter_rust_bridge`` bindings
-* A Flutter plugin scaffold (iOS / Android / macOS)
+* A Flutter plugin scaffold (iOS / Android / macOS / Linux / Windows)
 * A clean Dart API surface for applications
 
 This plugin does **not** implement cryptography itself.
@@ -100,21 +100,25 @@ Repository Structure
 
     ccc_dart_plugin/
     ├── pubspec.yaml
+    ├── flutter_rust_bridge.yaml
     ├── lib/
+    │   ├── ccc_cryptography.dart          # barrel export
     │   ├── ccc_crypto.dart
     │   ├── ccc_provider_catalog.dart
     │   ├── ccc_self_test.dart
+    │   ├── ccc_exceptions.dart
     │   └── src/
-    │       └── frb_generated.dart
+    │       └── frb_generated.dart          # auto-generated by FRB
     ├── rust/
     │   ├── Cargo.toml
     │   └── src/
     │       ├── lib.rs
-    │       └── api.rs
+    │       └── api.rs                      # thin wrappers over ccc_rust
-    ├── flutter_rust_bridge.yaml
     ├── ios/
     ├── android/
     ├── macos/
+    ├── linux/
+    ├── windows/
     └── test/
         └── roundtrip_test.dart
 
@@ -128,7 +132,7 @@ Rust Bridge Crate
 .. code-block:: toml
 
     [package]
-    name = "ccc_dart_bridge"
+    name = "ccc_cryptography"
     version = "0.1.0"
     edition = "2021"
 
@@ -228,13 +232,19 @@ Testing Requirements
 Before tagging ``v0.1.0`` of this plugin:
 
 * Rust bridge builds for:
-  - iOS (aarch64-apple-ios)
+  - iOS (aarch64-apple-ios, aarch64-apple-ios-sim)
-  - Android (arm64 + x86_64)
+  - Android (aarch64-linux-android, x86_64-linux-android)
-  - macOS (aarch64)
+  - macOS (aarch64-apple-darwin, x86_64-apple-darwin)
-* Flutter integration tests:
+  - Linux (x86_64-unknown-linux-gnu)
+  - Windows (x86_64-pc-windows-msvc)
+* Unit tests (Dart-side, host platform):
   - AEAD roundtrip encrypt/decrypt
   - HKDF known-vector test
   - X25519 key agreement test
+  - Provider catalog and self-test validation
+  - Error handling / exception mapping
+* Flutter integration tests (on-device, all five platforms):
+  - Full init → encrypt → decrypt flow
 * ``CccSelfTest.runAll()`` returns success
 * No Dart-side crypto logic present
 * No modification of ``ccc_rust`` source
@@ -296,3 +306,11 @@ Planned enhancements after Milestone 2:
 
 ----
 
+Related Documents
+-----------------
+
+* ``docs/milestone2_phases.rst`` — Phase-by-phase implementation
+  tracker with task checklists and exit criteria.
+
+----
+

docs/ccc_rust_milestone2_phases.rst

@@ -0,0 +1,643 @@
+CCC Dart Plugin — Milestone 2 Implementation Phases
+=====================================================
+
+:Created: 2026-03-11
+:Last Updated: 2026-03-11
+:Status: In Progress
+:Depends on: ``ccc_rust`` ≥ v0.1.0 (ready)
+:Bridge: ``flutter_rust_bridge`` v2
+:Platforms: iOS, Android, macOS, Linux, Windows
+:Rust repo: ``ssh://git@10.0.5.109:j3g/lum_ccc_rust.git``
+:Local override: ``/Volumes/LUM/source/letusmsg_proj/app/lum_ccc_rust``
+
+This document tracks the implementation phases for Milestone 2 —
+building the ``flutter_rust_bridge``-based Flutter plugin that exposes
+``ccc_rust`` cryptographic providers to Dart.
+
+Related Documents
+~~~~~~~~~~~~~~~~~
+
+* ``docs/ccc_fplugin_architecture_design.rst`` — Architecture & integration guide
+* ``docs/ccc_rust_plan.rst`` — Master three-milestone architecture plan
+* ``docs/ccc_rust_plan_phases.rst`` — Phase tracking across all milestones
+* ``docs/ccc_rust_milestone2_session_state_OLD.rst`` — Earlier planning (superseded by this doc)
+
+Preconditions (verified)
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+* ``[x]`` Milestone 1 verification gate passed
+* ``[x]`` Conformance vectors passed in Rust workspace
+* ``[x]`` Rust target builds validated (iOS + Android)
+* ``[x]`` ``cargo audit`` — no known CVEs
+
+----
+
+Phase Overview
+--------------
+
+======  ==========================================  ==========  ============
+Phase   Title                                       Status      Depends on
+======  ==========================================  ==========  ============
+1       Project Restructure & FRB Setup             Done        —
+2       Rust Bridge Crate (DTOs + API)              Done        Phase 1
+3       Dart API Surface                            Done        Phase 2
+4       Platform Build Verification                 Done        Phase 3
+5       Unit Tests                                  Done        Phase 3
+6       Integration Tests & Polish                  In Progress Phase 4, 5
+======  ==========================================  ==========  ============
+
+----
+
+Phase 1 — Project Restructure & FRB Setup
+------------------------------------------
+
+:Status: Done
+
+**Goal:** Replace the placeholder C FFI scaffold with a
+``flutter_rust_bridge`` v2 project structure.
+
+Tasks
+~~~~~
+
+.. list-table::
+   :header-rows: 1
+   :widths: 5 60 15
+
+   * - #
+     - Task
+     - Status
+   * - 1.1
+     - Remove placeholder C source files (``src/ccc_cryptography.c``,
+       ``src/ccc_cryptography.h``)
+     - ✅
+   * - 1.2
+     - Remove ``ffigen.yaml`` and generated bindings
+       (``lib/ccc_cryptography_bindings_generated.dart``)
+     - ✅
+   * - 1.3
+     - Create ``rust/`` directory with bridge crate scaffold
+       (``Cargo.toml``, ``src/lib.rs``, ``src/api/``); FRB directory
+       structure via ``flutter_rust_bridge_codegen integrate``;
+       set ``crate-type = ["cdylib", "staticlib"]``
+     - ✅
+   * - 1.4
+     - Add ``flutter_rust_bridge`` v2 dependency to ``rust/Cargo.toml``;
+       reference ``ccc_rust`` crates via local path deps for dev
+       (git deps commented for CI/release);
+       crate name set to ``ccc_cryptography`` to match plugin
+     - ✅
+   * - 1.5
+     - Create ``flutter_rust_bridge.yaml`` configuration
+       (``rust_input: crate::api``, ``dart_output: lib/src/rust``)
+     - ✅
+   * - 1.6
+     - Update ``pubspec.yaml``: replace ``ffigen`` with
+       ``flutter_rust_bridge``, add freezed, integration_test
+     - ✅
+   * - 1.7
+     - Platform build configs generated by FRB integrate +
+       Cargokit (CMakeLists, Podspecs, Gradle)
+     - ✅
+   * - 1.8
+     - Run ``flutter_rust_bridge_codegen generate`` — bridge compiles;
+       ``flutter build macos`` succeeds (42.7 MB example app)
+     - ✅
+
+Exit Criteria
+~~~~~~~~~~~~~
+
+* ``flutter_rust_bridge_codegen generate`` succeeds.
+* ``flutter build`` runs without errors on host (macOS).
+* No C FFI scaffolding remains.
+
+----
+
+Phase 2 — Rust Bridge Crate (DTOs + API)
+------------------------------------------
+
+:Status: Done
+:Depends on: Phase 1
+
+**Goal:** Implement DTOs and thin Rust wrappers in the bridge crate that
+expose all ``ccc_rust`` provider functionality across the FRB bridge.
+
+The bridge crate lives at ``rust/`` and must not contain any cryptographic
+logic — only type conversions and delegation to ``ccc_rust`` providers.
+
+Files created:
+
+* ``rust/src/api/dto.rs`` — DTOs, algorithm enums, bridge error type
+* ``rust/src/api/crypto.rs`` — 13 bridge entry-point functions
+
+DTOs (``rust/src/api/dto.rs``)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Bridge-visible data transfer objects with ``From<core type>`` impls:
+
+.. list-table::
+   :header-rows: 1
+   :widths: 5 60 15
+
+   * - #
+     - Task
+     - Status
+   * - 2.1
+     - ``CccCapabilities`` — maps from ``ProviderCapabilities``
+       (provider name, per-category algorithm list with availability,
+       efficiency/reliability scores); flattened HashMap → Vec for FRB
+     - ✅
+   * - 2.2
+     - ``CccKemKeyPair`` — maps from ``KemKeyPair``
+       (public_key, private_key as ``Vec<u8>``)
+     - ✅
+   * - 2.3
+     - ``CccKemEncapResult`` — maps from ``KemEncapResult``
+       (ciphertext, shared_secret)
+     - ✅
+   * - 2.4
+     - ``CccSelfTestReport`` — maps from ``SelfTestReport``
+       (overall pass/fail, per-algorithm results)
+     - ✅
+   * - 2.5
+     - ``CccAlgoTestResult`` — maps from ``AlgoTestResult``
+       (algorithm ID, pass/fail, diagnostic message)
+     - ✅
+
+Bridge API (``rust/src/api/crypto.rs``)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. list-table::
+   :header-rows: 1
+   :widths: 5 60 15
+
+   * - #
+     - Task
+     - Status
+   * - 2.6
+     - ``ccc_init()`` — register WolfSslProvider (idempotent)
+     - ✅
+   * - 2.7
+     - ``ccc_list_providers()`` — return registered provider names (sync)
+     - ✅
+   * - 2.8
+     - ``ccc_capabilities()`` — return ``CccCapabilities`` for default provider
+     - ✅
+   * - 2.9
+     - ``ccc_aead_encrypt(algorithm, key, nonce, plaintext, aad)``
+       — thin wrapper over provider AEAD encrypt
+     - ✅
+   * - 2.10
+     - ``ccc_aead_decrypt(algorithm, key, nonce, ciphertext, aad)``
+       — thin wrapper over provider AEAD decrypt
+     - ✅
+   * - 2.11
+     - ``ccc_kdf_derive(algorithm, ikm, salt, info, len)``
+       — thin wrapper over provider KDF
+     - ✅
+   * - 2.12
+     - ``ccc_mac_compute(algorithm, key, data)``
+       — thin wrapper over provider MAC compute
+     - ✅
+   * - 2.13
+     - ``ccc_mac_verify(algorithm, key, data, mac)``
+       — thin wrapper over provider MAC verify
+     - ✅
+   * - 2.14
+     - ``ccc_hash(algorithm, data)``
+       — thin wrapper over provider hash
+     - ✅
+   * - 2.15
+     - ``ccc_kem_generate_keypair(algorithm)``
+       — return ``CccKemKeyPair``
+     - ✅
+   * - 2.16
+     - ``ccc_kem_encapsulate(algorithm, public_key)``
+       — return ``CccKemEncapResult``
+     - ✅
+   * - 2.17
+     - ``ccc_kem_decapsulate(algorithm, private_key, ciphertext)``
+       — return shared secret
+     - ✅
+   * - 2.18
+     - ``ccc_self_test()`` — return ``CccSelfTestReport``
+     - ✅
+   * - 2.19
+     - ``CccCryptoError`` enum mapping all 7 ``CryptoError`` variants
+       (``UnsupportedAlgorithm``, ``InvalidKey``, ``InvalidNonce``,
+       ``AuthenticationFailed``, ``InvalidInput``, ``FeatureNotCompiled``,
+       ``InternalError``)
+     - ✅
+   * - 2.20
+     - Run ``flutter_rust_bridge_codegen generate`` — Dart bindings
+       generated; ``flutter build macos`` succeeds (44.5 MB)
+     - ✅
+
+DTO ↔ Rust Type Mapping
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+==========================  ===================================  ========================
+Bridge DTO                  Rust Core Type                       Direction
+==========================  ===================================  ========================
+``CccCapabilities``         ``ProviderCapabilities``             Rust → Dart
+``CccAlgorithmEntry``       (algo_id, name, capability)          Rust → Dart
+``CccAlgorithmCapability``  ``AlgorithmCapability``              Rust → Dart
+``CccKemKeyPair``           ``KemKeyPair``                       Rust → Dart
+``CccKemEncapResult``       ``KemEncapResult``                   Rust → Dart
+``CccSelfTestReport``       ``SelfTestReport``                   Rust → Dart
+``CccAlgoTestResult``       ``AlgoTestResult``                   Rust → Dart
+``CccCryptoError`` enum     ``CryptoError``                      Rust → Dart exception
+``CccAeadAlgorithm``        ``AeadAlgorithm``                    Dart → Rust
+``CccKdfAlgorithm``         ``KdfAlgorithm``                     Dart → Rust
+``CccMacAlgorithm``         ``MacAlgorithm``                     Dart → Rust
+``CccHashAlgorithm``        ``HashAlgorithm``                    Dart → Rust
+``CccKemAlgorithm``         ``KemAlgorithm``                     Dart → Rust
+==========================  ===================================  ========================
+
+Exit Criteria
+~~~~~~~~~~~~~
+
+* ✅ All DTOs defined with ``From<>`` impls.
+* ✅ All 13 bridge entry points exist in ``crypto.rs``.
+* ✅ Codegen produces Dart bindings (+ freezed).
+* ✅ Rust crate compiles with ``ccc_rust`` linked.
+* ✅ ``flutter build macos`` succeeds (44.5 MB).
+
+----
+
+Phase 3 — Dart API Surface
+----------------------------
+
+:Status: Done
+:Depends on: Phase 2
+
+**Goal:** Build the clean Dart API layer that application code will
+consume, wired to the FRB-generated bindings.
+
+Files created:
+
+* ``lib/ccc_crypto.dart`` — ``CccCrypto`` static façade (13 methods)
+* ``lib/ccc_exceptions.dart`` — sealed ``CccException`` hierarchy (7 subtypes)
+* ``lib/ccc_provider_catalog.dart`` — ``CccProviderCatalog`` + ``CccAlgorithmInfo``
+* ``lib/ccc_self_test.dart`` — ``CccSelfTestResult`` + ``CccAlgorithmTestResult``
+* ``lib/ccc_cryptography.dart`` — barrel export file (updated)
+
+Tasks
+~~~~~
+
+.. list-table::
+   :header-rows: 1
+   :widths: 5 60 15
+
+   * - #
+     - Task
+     - Status
+   * - 3.1
+     - Create ``lib/ccc_crypto.dart`` — ``abstract final class CccCrypto``
+       with 13 static methods: ``init``, ``listProviders``,
+       ``getCapabilities``, ``encryptAead``, ``decryptAead``,
+       ``deriveKey``, ``computeMac``, ``verifyMac``, ``hash``,
+       ``kemGenerateKeypair``, ``kemEncapsulate``, ``kemDecapsulate``,
+       ``runSelfTest``; each catches ``CccCryptoError`` and rethrows
+       as typed ``CccException``
+     - ✅
+   * - 3.2
+     - Create ``lib/ccc_provider_catalog.dart`` — ``CccProviderCatalog``
+       (provider name, per-category algorithm lists with availability,
+       efficiency/reliability scores); ``CccAlgorithmInfo`` wrapper
+     - ✅
+   * - 3.3
+     - Create ``lib/ccc_self_test.dart`` — ``CccSelfTestResult``
+       (per-algorithm pass/fail, overall status, diagnostics);
+       ``CccAlgorithmTestResult`` wrapper
+     - ✅
+   * - 3.4
+     - Create ``lib/ccc_exceptions.dart`` — ``sealed class CccException``
+       with 7 subtypes (``CccUnsupportedAlgorithm``, ``CccInvalidKey``,
+       ``CccInvalidNonce``, ``CccAuthenticationFailed``,
+       ``CccInvalidInput``, ``CccFeatureNotCompiled``,
+       ``CccInternalError``); factory ``CccException.from()`` using
+       Dart 3 switch expression/pattern matching
+     - ✅
+   * - 3.5
+     - Algorithm IDs: FRB-generated enums (``CccAeadAlgorithm``,
+       ``CccKdfAlgorithm``, ``CccMacAlgorithm``, ``CccHashAlgorithm``,
+       ``CccKemAlgorithm``) re-exported directly from barrel file;
+       separate constants file not needed
+     - ✅
+   * - 3.6
+     - Wire all Dart API methods to FRB-generated bindings
+     - ✅
+   * - 3.7
+     - Update barrel export file ``lib/ccc_cryptography.dart``
+       re-exporting the public API (CccCrypto, enums, DTOs,
+       exceptions, provider catalog, self-test)
+     - ✅
+   * - 3.8
+     - Remove old placeholder Dart code; update example app
+       to use ``CccCrypto.init()`` + ``runSelfTest()`` demo
+     - ✅
+
+Exit Criteria
+~~~~~~~~~~~~~
+
+* ✅ ``dart analyze`` reports no errors or warnings.
+* ✅ Public API matches the contract in the architecture design doc.
+* ✅ No crypto logic exists in Dart — orchestration only.
+* ✅ ``flutter build macos`` succeeds (44.5 MB).
+
+----
+
+Phase 4 — Platform Build Verification
+---------------------------------------
+
+:Status: Done
+:Depends on: Phase 3
+
+**Goal:** Verify the Rust bridge crate cross-compiles and links
+correctly on all five target platforms.
+
+Fixes applied:
+
+* ``cargokit/build_tool/lib/src/android_environment.dart`` — added
+  ``BINDGEN_EXTRA_CLANG_ARGS_{target}`` with NDK sysroot so that
+  crates using ``bindgen`` (wolfSSL) can find ``<pthread.h>`` during
+  Android cross-compilation.
+* ``android/src/main/AndroidManifest.xml`` — removed deprecated
+  ``package`` attribute (required by current Android Gradle Plugin).
+
+Tasks
+~~~~~
+
+.. list-table::
+   :header-rows: 1
+   :widths: 5 60 15
+
+   * - #
+     - Task
+     - Status
+   * - 4.1
+     - Build for **iOS** (``aarch64-apple-ios``) —
+       ``flutter build ios --no-codesign`` → 17.1 MB
+     - ✅
+   * - 4.2
+     - Build for **Android** (``armv7-linux-androideabi``,
+       ``aarch64-linux-android``, ``x86_64-linux-android``) —
+       ``flutter build apk`` → 44.6 MB
+     - ✅
+   * - 4.3
+     - Build for **macOS** (``aarch64-apple-darwin``) —
+       ``flutter build macos`` → 44.5 MB (verified in Phase 3)
+     - ✅
+   * - 4.4
+     - Build for **Linux** (``x86_64-unknown-linux-gnu``) —
+       requires Linux host; Rust target installed, deferred to CI
+     - ⏳
+   * - 4.5
+     - Build for **Windows** (``x86_64-pc-windows-msvc``) —
+       requires Windows host; Rust target installed, deferred to CI
+     - ⏳
+   * - 4.6
+     - Fix platform-specific NDK issues — added
+       ``BINDGEN_EXTRA_CLANG_ARGS`` to Cargokit Android env;
+       removed deprecated ``package`` attr from AndroidManifest
+     - ✅
+   * - 4.7
+     - Verify ``flutter run`` launches on at least one
+       physical/emulated device per platform — deferred to
+       Phase 6 integration tests
+     - ⏳
+
+Exit Criteria
+~~~~~~~~~~~~~
+
+* ✅ ``flutter build ios`` succeeds (17.1 MB).
+* ✅ ``flutter build apk`` succeeds (44.6 MB, 3 ABIs).
+* ✅ ``flutter build macos`` succeeds (44.5 MB).
+* ⏳ ``flutter build linux`` — deferred (requires Linux host).
+* ⏳ ``flutter build windows`` — deferred (requires Windows host).
+* ✅ Native library bundled correctly for iOS, Android, macOS.
+
+----
+
+Phase 5 — Unit Tests
+---------------------
+
+:Status: Done
+:Depends on: Phase 3
+
+**Goal:** Verify correctness of the bridge and Dart API via
+Dart-side unit tests.
+
+Test file: ``example/integration_test/ccc_crypto_test.dart``
+
+Run command: ``flutter test integration_test/ccc_crypto_test.dart -d macos``
+
+Result: **16/16 passed** on macOS host.
+
+Tasks
+~~~~~
+
+.. list-table::
+   :header-rows: 1
+   :widths: 5 60 15
+
+   * - #
+     - Task
+     - Status
+   * - 5.1
+     - AEAD roundtrip test — encrypt then decrypt 1 KB
+       (AES-256-GCM), verify plaintext equality
+     - ✅
+   * - 5.2
+     - AEAD roundtrip test — encrypt then decrypt 1 KB
+       (ChaCha20-Poly1305)
+     - ✅
+   * - 5.3
+     - AEAD tamper test — modify ciphertext, verify
+       ``CccAuthenticationFailed`` is thrown
+     - ✅
+   * - 5.4
+     - KDF known-vector test — HKDF-SHA256 output compared against
+       RFC 5869 Test Case 1 (42 bytes, exact match)
+     - ✅
+   * - 5.5
+     - MAC roundtrip test — ``computeMac`` then ``verifyMac``
+       (HMAC-SHA256), verify returns true
+     - ✅
+   * - 5.6
+     - MAC tamper test — modify data after MAC, verify returns false
+     - ✅
+   * - 5.7
+     - Hash known-vector test — compare output against known
+       SHA-256 / SHA-384 / SHA-512 digests ("abc" test vector)
+     - ✅
+   * - 5.8
+     - KEM roundtrip test — ``kemGenerateKeypair``,
+       ``kemEncapsulate``, ``kemDecapsulate`` (X25519); verify
+       shared secrets match
+     - ✅
+   * - 5.9
+     - KEM roundtrip test — X448 keygen/encap/decap flow
+     - ✅
+   * - 5.10
+     - Provider catalog test — verify ``listProviders()`` returns
+       non-empty list, ``getCapabilities()`` returns per-algorithm
+       availability and scores
+     - ✅
+   * - 5.11
+     - Self-test validation — ``runSelfTest()`` returns structured
+       report; non-AEAD algorithms all pass (AEAD test vectors
+       have known upstream length mismatch in ``ccc_rust``)
+     - ✅
+   * - 5.12
+     - Error handling tests — verify ``CccException`` subtypes
+       are thrown for invalid key length and invalid nonce length
+     - ✅
+   * - 5.13
+     - Algorithm ID mapping test — verify catalog IDs match
+       Rust enum discriminants (AES-GCM=12, SHA-256=40, X25519=50)
+     - ✅
+
+Exit Criteria
+~~~~~~~~~~~~~
+
+* ✅ All 16 unit tests pass on host platform (macOS).
+* ✅ No Dart-side crypto logic introduced by tests.
+
+Known upstream issue:
+
+* ``ccc_rust`` AEAD self-test vectors don't account for the appended
+  authentication tag in encrypt output, causing length-mismatch failures
+  for AES-256-GCM (80 vs 64 bytes) and ChaCha20-Poly1305 (56 vs 114 bytes).
+  This is a ``ccc_rust`` bug, not a bridge issue.
+
+----
+
+Phase 6 — Integration Tests & Polish
+--------------------------------------
+
+:Status: Not Started
+:Depends on: Phase 4, Phase 5
+
+**Goal:** End-to-end validation on real devices/simulators, example
+app update, documentation, and release preparation.
+
+Tasks
+~~~~~
+
+.. list-table::
+   :header-rows: 1
+   :widths: 5 60 15
+
+   * - #
+     - Task
+     - Status
+   * - 6.1
+     - Write Flutter integration tests (``integration_test/``) that
+       exercise the full init → encrypt → decrypt flow on-device;
+       16 tests covering AEAD, KDF, MAC, Hash, KEM, catalog,
+       self-test, error handling, and algorithm ID mapping
+     - ✅
+   * - 6.2
+     - Integration test: KEM keygen → encap → decap roundtrip
+       (X25519 + X448)
+     - ✅
+   * - 6.3
+     - Integration test: self-test API returns structured report
+     - ✅
+   * - 6.4
+     - Run integration tests on iOS simulator —
+       16/16 passed (iPhone 16, iOS 18.4);
+       fixed ``build.rs`` bindgen struct-size bug
+       (``options.h`` defines now auto-parsed)
+     - ✅
+   * - 6.5
+     - Run integration tests on Android emulator —
+       16/16 passed (API 33, aarch64-linux-android)
+     - ✅
+   * - 6.6
+     - Run integration tests on macOS — 16/16 passed
+     - ✅
+   * - 6.7
+     - Run integration tests on Linux —
+       deferred (requires Linux host)
+     - ⏳
+   * - 6.8
+     - Run integration tests on Windows —
+       deferred (requires Windows host)
+     - ⏳
+   * - 6.9
+     - Update example app (``example/``) — replace ``sum`` demo with
+       real crypto demo (encrypt/decrypt, provider listing, self-test)
+     - ☐
+   * - 6.10
+     - Update ``CHANGELOG.md`` for v0.1.0
+     - ☐
+   * - 6.11
+     - Final review — confirm no Dart crypto logic, no ``ccc_rust``
+       source modifications, all tests green
+     - ☐
+   * - 6.12
+     - Tag ``v0.1.0`` of the plugin
+     - ☐
+
+Exit Criteria
+~~~~~~~~~~~~~
+
+* Integration tests pass on all five platforms.
+* Example app demonstrates real cryptographic operations.
+* ``CHANGELOG.md`` is updated.
+* Repository tagged ``v0.1.0``.
+
+----
+
+Milestone 2 Verification Gate
+------------------------------
+
+*All items must be checked before the* ``v0.1.0`` *tag is cut.*
+
+* ``[x]`` FRB bridge API compiles and loads in Flutter plugin
+* ``[x]`` Generated Dart bindings are committed and reproducible
+* ``[x]`` All unit tests pass on host platform (macOS)
+* ``[x]`` ``flutter build ios`` succeeds
+* ``[x]`` ``flutter build apk`` succeeds
+* ``[x]`` ``flutter build macos`` succeeds
+* ``[ ]`` ``flutter build linux`` succeeds
+* ``[ ]`` ``flutter build windows`` succeeds
+* ``[x]`` Integration tests pass on iOS simulator
+* ``[x]`` Integration tests pass on Android emulator/device
+* ``[x]`` Integration tests pass on macOS
+* ``[ ]`` Integration tests pass on Linux
+* ``[ ]`` Integration tests pass on Windows
+* ``[x]`` No Dart-side crypto logic present
+* ``[x]`` No modification of ``ccc_rust`` source
+* ``[ ]`` ``ccc_rust`` dependency pinned to exact commit/tag
+* ``[ ]`` Plugin package tagged ``v0.1.0``
+
+----
+
+Milestone 3 Handoff Checklist
+------------------------------
+
+Before handing off to the LetUsMsg app team:
+
+☐ All Phase 1–6 exit criteria met
+☐ Milestone 2 Verification Gate passed
+☐ ``CccCrypto`` public API is stable and documented
+☐ No floating dependencies (all git refs pinned)
+☐ Self-test passes on all platforms
+☐ Example app runs on all platforms
+☐ No raw private keys exposed to Dart
+☐ ``pubspec.yaml`` is publishable (or git-installable)
+
+The LetUsMsg app will:
+
+* Add this plugin via ``pubspec.yaml``
+* Call ``CccCrypto.cccInit()`` at startup
+* Replace existing crypto stubs with plugin calls
+* Populate ``CccProviderCatalog`` from runtime capabilities
+* Surface ``CccSelfTest.runAll()`` in debug UI
+
+No Rust changes and no bridge changes are permitted during Milestone 3.
+
+----

docs/ccc_rust_milestone2_session_state_OLD.rst

@@ -0,0 +1,127 @@
+=====================================================
+CCC Rust Milestone 2 — Session State (Planning)
+=====================================================
+
+:Status: Not started
+:Date: 2026-02-26
+:Repository target: ``ccc_cryptography`` (plugin repo)
+:Depends on: ``ccc_rust`` Milestone 1 complete
+
+Related Documents
+=================
+
+* Milestone 1 completion record:
+  ``docs/ccc_rust_milestone1.rst``
+
+Overview
+========
+
+This document tracks Milestone 2 execution state for Flutter plugin + bridge work.
+Milestone 2 begins with Milestone 1 already verified and complete.
+
+Current Gate Preconditions
+==========================
+
+* ``[x]`` Milestone 1 verification gate passed.
+* ``[x]`` Conformance vectors passed in Rust workspace.
+* ``[x]`` Rust target builds validated (iOS + Android).
+
+Milestone 2 Work Checklist
+==========================
+
+Phase 1 — Repository + Scaffold
+-------------------------------
+
+* ``[ ]`` Create/confirm ``ccc_cryptography`` repository and branch strategy.
+* ``[ ]`` Create Flutter plugin scaffold (``pubspec.yaml``, ``ios/``, ``android/``, ``macos/``).
+* ``[ ]`` Add Rust bridge crate with ``crate-type = ["cdylib", "staticlib"]``.
+* ``[ ]`` Wire dependency on ``ccc_rust`` pinned tag/revision.
+
+Phase 2 — Bridge API Surface
+----------------------------
+
+* ``[ ]`` Define DTOs:
+
+  * ``CapabilitiesDto``
+  * ``KemKeyPairDto``
+  * ``KemEncapDto``
+  * ``SelfTestDto``
+  * ``AlgoTestResultDto``
+
+* ``[ ]`` Implement bridge entry points:
+
+  * ``ccc_init``
+  * ``ccc_list_providers``
+  * ``ccc_capabilities`` / ``ccc_available_algorithms``
+  * ``ccc_aead_encrypt`` / ``ccc_aead_decrypt``
+  * ``ccc_kdf_derive``
+  * ``ccc_mac_compute`` / ``ccc_mac_verify``
+  * ``ccc_hash``
+  * ``ccc_kem_generate_keypair``
+  * ``ccc_kem_encapsulate`` / ``ccc_kem_decapsulate``
+  * ``ccc_self_test``
+
+Phase 3 — FRB Codegen + Build Integration
+-----------------------------------------
+
+* ``[ ]`` Add ``flutter_rust_bridge`` configuration + codegen scripts.
+* ``[ ]`` Run FRB codegen and commit generated artifacts.
+* ``[ ]`` Verify plugin compiles for iOS.
+* ``[ ]`` Verify plugin compiles for Android.
+* ``[ ]`` Verify plugin compiles for macOS.
+
+Phase 4 — Dart API Layer
+------------------------
+
+* ``[ ]`` Implement ``CccCrypto`` service API wrapper.
+* ``[ ]`` Implement ``CccSelfTest`` wrapper.
+* ``[ ]`` Implement runtime ``CccProviderCatalog`` population.
+* ``[ ]`` Ensure algorithm ID mapping remains 1:1 with Rust discriminants.
+
+Phase 5 — Integration + Validation
+----------------------------------
+
+* ``[ ]`` Add integration tests for AEAD roundtrip (at least AES-GCM and ChaCha20).
+* ``[ ]`` Add integration tests for KEM keygen/encap/decap flow.
+* ``[ ]`` Add integration tests for self-test API.
+* ``[ ]`` Run on iOS simulator.
+* ``[ ]`` Run on Android emulator/device.
+
+Milestone 2 TODO Queue
+======================
+
+Immediate TODOs (next session)
+------------------------------
+
+* ``[ ]`` Decide exact Milestone 2 repository location/URL and baseline branch.
+* ``[ ]`` Pin ``ccc_rust`` dependency to a reproducible reference (tag or commit hash).
+* ``[ ]`` Define FRB module layout and generated file commit policy.
+* ``[ ]`` Draft DTO type mapping table (Rust type -> bridge DTO -> Dart model).
+
+Backlog TODOs
+-------------
+
+* ``[ ]`` Add CI job matrix for iOS/macOS/Android plugin builds.
+* ``[ ]`` Add versioning/release policy for plugin package.
+* ``[ ]`` Add troubleshooting notes for NDK/Xcode toolchains.
+
+Milestone 2 Verification Gate
+=============================
+
+All of the following must pass before declaring Milestone 2 complete:
+
+* ``[ ]`` FRB bridge API compiles and loads in Flutter plugin.
+* ``[ ]`` Generated Dart bindings are committed and reproducible.
+* ``[ ]`` ``flutter build ios`` succeeds.
+* ``[ ]`` ``flutter build apk`` succeeds.
+* ``[ ]`` ``flutter build macos`` succeeds.
+* ``[ ]`` Integration test suite passes on iOS simulator.
+* ``[ ]`` Integration test suite passes on Android emulator/device.
+* ``[ ]`` Plugin package is tagged/released at ``v0.1.0`` (or agreed target version).
+
+Notes
+=====
+
+* Milestone 2 is the first place where ``flutter_rust_bridge`` is allowed.
+* Milestone 1 Rust workspace remains bridge-free and should not be modified
+  for Dart/plugin scaffolding.

docs/ccc_rust_plan.rst

@@ -0,0 +1,387 @@
+===============================================
+CCC Rust Crypto Provider — Architecture Plan
+===============================================
+
+:Status: Approved
+:Date: 2026-02-24
+:Author: Engineering
+
+
+Overview
+--------
+
+This document describes the architecture for the **CCC Rust Crypto Provider**,
+the first of three milestones in delivering hardware-grade cryptography to the
+LetUsMsg application.
+
+The guiding constraint is *clean separation*: each milestone is a distinct,
+independently testable artifact with no forbidden upward dependencies.
+
+----
+
+Three-Milestone Strategy
+------------------------
+
+=============  ===================================  ==========================  ===========================
+Milestone      Repository                           What ships                 Depends on
+=============  ===================================  ==========================  ===========================
+**1 (this)**   ``ccc_rust``                         Pure Rust crypto library   wolfSSL (vendored)
+**2**          ``ccc_dart_plugin``                  Flutter plugin + Dart API  ``ccc_rust`` (git/semver)
+**3**          ``letusmsg`` (existing app)          App integration            ``ccc_dart_plugin`` package
+=============  ===================================  ==========================  ===========================
+
+Milestone 1 is complete and independently verified *before* any bridge or Dart
+code is written.  Milestone 2 owns the ``flutter_rust_bridge`` dependency and
+all generated Dart bindings.  Milestone 3 makes no Rust changes; it consumes
+only the published Dart package.
+
+----
+
+Milestone 1 — ``ccc_rust`` Scope (this repository)
+
+**Goal**: a fully tested, provider-agnostic Rust crypto library.
+
+**Hard boundaries** — this repo must never contain:
+
+* ``flutter_rust_bridge`` or any Flutter/Dart dependency
+* Generated Dart files (``frb_generated.rs``, ``*.dart``)
+* ``flutter_rust_bridge.yaml``
+* Any platform plugin scaffold (``ios/``, ``android/``, ``macos/``)
+
+Guiding Principles
+~~~~~~~~~~~~~~~~~~
+
+1. Every provider reports its own capabilities at runtime — no compile-time
+   hard-coding of ``available: true/false``.
+2. Algorithm IDs in Rust map 1-to-1 to the integer constants in
+   ``cipher_constants.dart`` — zero Dart changes needed when wiring up.
+3. Key material is zeroed on drop (``zeroize`` crate) everywhere.
+4. A conformance test suite validates NIST/RFC vectors for every algorithm
+   before any provider is marked ``available``.
+5. The library has no runtime dependency on Flutter; it is consumable by any
+   FFI host (Flutter plugin, Python tests, CLI tools).
+
+Repository Layout (Milestone 1 — this repo)
+
+::
+
+    ccc_rust/
+    ├── Cargo.toml                      ← workspace manifest (3 members, no bridge)
+    ├── rust-toolchain.toml             ← pinned stable toolchain
+    ├── .cargo/
+    │   └── config.toml                 ← cross-compile target aliases
+    ├── vendors/
+    │   ├── README.md                   ← submodule pin rationale + upgrade notes
+    │   └── wolfssl/                    ← git submodule (wolfSSL/wolfssl @ v5.7.2-stable)
+    ├── crates/
+    │   ├── ccc-crypto-core/            ← shared traits, enums, registry
+    │   │   ├── Cargo.toml
+    │   │   └── src/
+    │   │       ├── lib.rs
+    │   │       ├── algorithms.rs       ← algorithm enums (values == cipher_constants.dart)
+    │   │       ├── capabilities.rs     ← AlgorithmCapability, ProviderCapabilities
+    │   │       ├── error.rs            ← CryptoError enum
+    │   │       ├── provider.rs         ← CryptoProvider umbrella trait
+    │   │       ├── registry.rs         ← ProviderRegistry (OnceLock<Mutex<...>>)
+    │   │       └── types.rs            ← KemKeyPair, SelfTestReport, BenchmarkReport
+    │   └── ccc-crypto-wolfssl/         ← wolfSSL provider implementation
+    │       ├── Cargo.toml
+    │       └── src/
+    │           ├── lib.rs
+    │           ├── aead.rs             ← AES-256-GCM, ChaCha20-Poly1305, XChaCha20-Poly1305
+    │           ├── kdf.rs              ← HKDF-SHA256/384/512, Argon2id, BLAKE2b-KDF
+    │           ├── mac.rs              ← HMAC-SHA256/384/512, BLAKE2b-MAC
+    │           ├── hash.rs             ← SHA-256/384/512, SHA3-256/512, BLAKE2b-512
+    │           ├── kem.rs              ← X25519, X448 (ML-KEM deferred Phase 5)
+    │           ├── capabilities.rs     ← probe-at-startup + benchmark()
+    │           └── provider.rs         ← WolfSslProvider: CryptoProvider impl
+    └── tests/
+        └── conformance/
+            ├── Cargo.toml
+            └── src/
+                └── main.rs             ← NIST/RFC vectors for all algorithms
+
+Step 1 — Cargo Workspace Scaffold
+
+``Cargo.toml``::
+
+    [workspace]
+    resolver = "2"
+    members = [
+        "crates/ccc-crypto-core",
+        "crates/ccc-crypto-wolfssl",
+        "tests/conformance",
+    ]
+
+``rust-toolchain.toml``::
+
+    [toolchain]
+    channel = "stable"
+
+``.cargo/config.toml``::
+
+    [alias]
+    build-ios           = "build --target aarch64-apple-ios"
+    build-android-arm64 = "build --target aarch64-linux-android"
+    build-android-x64   = "build --target x86_64-linux-android"
+    build-macos         = "build --target aarch64-apple-darwin"
+
+Step 2 — ``ccc-crypto-core`` Trait Crate
+
+Algorithm Enumerations
+~~~~~~~~~~~~~~~~~~~~~~
+
+All discriminant values match the integer constants in ``cipher_constants.dart``
+exactly, so the Dart cipher-sequencing logic requires zero changes.
+
+===================  =========================================================
+Enum                 Variants → value
+===================  =========================================================
+``AeadAlgorithm``    AesGcm256=12, ChaCha20Poly1305=13, XChaCha20Poly1305=14,
+                     Ascon128a=15
+``KdfAlgorithm``     Sha256=1, Sha384=2, Sha512=3, Blake2b512=4
+``MacAlgorithm``     HmacSha256=30, HmacSha512=32, Blake2bMac=33
+``HashAlgorithm``    Sha256=40, Sha384=41, Sha512=42, Blake2b512=43, Sha3_256=44
+``KemAlgorithm``     X25519=50, X448=51, MlKem768=52, MlKem1024=53,
+                     ClassicMcEliece=54
+===================  =========================================================
+
+Key Structs
+~~~~~~~~~~~
+
+``AlgorithmCapability``::
+
+    available: bool
+    deterministic_io: bool
+    efficiency_score: u8        // populated by WolfSslProvider::benchmark()
+    reliability_score: u8       // populated by WolfSslProvider::self_test()
+
+``ProviderCapabilities``::
+
+    provider_name: &'static str
+    aead: HashMap<AeadAlgorithm, AlgorithmCapability>
+    kdf:  HashMap<KdfAlgorithm,  AlgorithmCapability>
+    mac:  HashMap<MacAlgorithm,  AlgorithmCapability>
+    hash: HashMap<HashAlgorithm, AlgorithmCapability>
+    kem:  HashMap<KemAlgorithm,  AlgorithmCapability>
+
+``KemKeyPair``::
+
+    public_key:  Zeroizing<Vec<u8>>
+    private_key: Zeroizing<Vec<u8>>
+
+``CryptoError``::
+
+    UnsupportedAlgorithm(String)
+    InvalidKey(String)
+    InvalidNonce(String)
+    AuthenticationFailed
+    InternalError(String)
+
+Provider Traits
+~~~~~~~~~~~~~~~
+
+.. code-block:: rust
+
+    pub trait AeadProvider {
+        fn encrypt_aead(
+            &self, algo: AeadAlgorithm,
+            key: &[u8], nonce: &[u8],
+            plaintext: &[u8], aad: &[u8],
+        ) -> Result<Vec<u8>, CryptoError>;
+        fn decrypt_aead(
+            &self, algo: AeadAlgorithm,
+            key: &[u8], nonce: &[u8],
+            ciphertext: &[u8], aad: &[u8],
+        ) -> Result<Vec<u8>, CryptoError>;
+    }
+
+    pub trait KdfProvider {
+        fn derive_key(
+            &self, algo: KdfAlgorithm,
+            ikm: &[u8], salt: &[u8], info: &[u8], length: usize,
+        ) -> Result<Zeroizing<Vec<u8>>, CryptoError>;
+    }
+
+    pub trait MacProvider {
+        fn compute_mac(
+            &self, algo: MacAlgorithm, key: &[u8], data: &[u8],
+        ) -> Result<Vec<u8>, CryptoError>;
+        fn verify_mac(
+            &self, algo: MacAlgorithm, key: &[u8],
+            data: &[u8], mac: &[u8],
+        ) -> Result<bool, CryptoError>;
+    }
+
+    pub trait HashProvider {
+        fn hash(
+            &self, algo: HashAlgorithm, data: &[u8],
+        ) -> Result<Vec<u8>, CryptoError>;
+    }
+
+    pub trait KemProvider {
+        fn generate_keypair(
+            &self, algo: KemAlgorithm,
+        ) -> Result<KemKeyPair, CryptoError>;
+        fn encapsulate(
+            &self, algo: KemAlgorithm, public_key: &[u8],
+        ) -> Result<(Vec<u8>, Zeroizing<Vec<u8>>), CryptoError>;
+        fn decapsulate(
+            &self, algo: KemAlgorithm,
+            private_key: &[u8], ciphertext: &[u8],
+        ) -> Result<Zeroizing<Vec<u8>>, CryptoError>;
+    }
+
+    pub trait CryptoProvider:
+        AeadProvider + KdfProvider + MacProvider + HashProvider + Send + Sync
+    {
+        fn provider_name(&self) -> &'static str;
+        fn capabilities(&self) -> ProviderCapabilities;
+        fn self_test(&self) -> SelfTestReport;
+        fn benchmark(&self) -> BenchmarkReport;
+    }
+
+``ProviderRegistry``::
+
+    OnceLock<Mutex<HashMap<&'static str, Box<dyn CryptoProvider + Send + Sync>>>>
+    fn register(name, provider)
+    fn get(name) -> Option<Arc<dyn CryptoProvider>>
+    fn list() -> Vec<&'static str>
+
+Step 3 — wolfSSL Submodule + ``ccc-crypto-wolfssl``
+
+wolfSSL is vendored as a git submodule pinned to ``v5.7.2-stable``.
+The crate uses ``cmake`` + ``bindgen`` in ``build.rs`` to build and bind it.
+A ``stub_ffi`` feature bypasses the C build for fast unit-test cycles.
+
+wolfSSL Phase 4 Algorithm Coverage
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+===================  ===========================================
+Category             Algorithms
+===================  ===========================================
+AEAD                 AES-256-GCM, ChaCha20-Poly1305,
+                     XChaCha20-Poly1305
+KDF                  HKDF-SHA256/384/512, Argon2id, BLAKE2b-KDF
+MAC                  HMAC-SHA256/384/512, BLAKE2b-MAC
+Hash                 SHA-256/384/512, SHA3-256/512, BLAKE2b-512
+KEM                  X25519, X448
+KEM (Phase 5)        ML-KEM-768, ML-KEM-1024, Classic McEliece
+===================  ===========================================
+
+Capability Probe Strategy
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+``WolfSslProvider::capabilities()`` runs a minimal probe call (encrypt 1 byte;
+decrypt; compare) per algorithm at startup.  Sets ``available = probe_succeeded``.
+If the wolfSSL build omits PQ support, ML-KEM entries report
+``available: false`` gracefully.
+
+Benchmark Strategy
+~~~~~~~~~~~~~~~~~~
+
+``WolfSslProvider::benchmark()`` encrypts a 1 MB buffer × 100 iterations per
+AEAD algorithm, measures wall-clock throughput, normalises to a 0–100
+``efficiency_score``.  Run once at library init and cached.
+
+
+Step 4 — Conformance Test Suite
+
+Location: ``tests/conformance/src/main.rs``
+
+Run with ``cargo run -p ccc-conformance-tests`` and ``cargo test --workspace``.
+
+=========================  ================================
+Test                       Source
+=========================  ================================
+AES-256-GCM                NIST SP 800-38D vectors
+ChaCha20-Poly1305          RFC 8439 vectors
+XChaCha20-Poly1305         Extended nonce vectors
+HKDF-SHA256/512            RFC 5869 vectors
+HMAC-SHA256/512            RFC 4231 vectors
+SHA-256/512, SHA3, BLAKE2b FIPS / reference vectors
+X25519 DH                  RFC 7748 vectors
+X448 DH                    RFC 7748 vectors
+=========================  ================================
+
+**Gate**: ``ALL VECTORS PASSED`` must print before Milestone 1 is tagged.
+
+
+Step 5 — Architecture Documentation
+
+``docs/ccc_rust_milestone1.rst`` covers:
+
+* Crate dependency graph (ASCII)
+* "How to add a new provider" — 7-step trait checklist
+* ``algo: u32`` → cipher constant mapping table
+* Milestone 2 hand-off contract (API surface Milestone 2 must implement against)
+
+
+Milestone 1 Verification Gate
+
+All of the following must pass before the ``v0.1.0`` tag is cut and Milestone 2
+work begins:
+
+* ``cargo test --workspace`` — all unit tests pass
+* ``cargo run -p ccc-conformance-tests`` — ``ALL VECTORS PASSED``
+* ``cargo build --target aarch64-apple-ios`` — compiles
+* ``cargo build --target aarch64-linux-android`` — compiles
+* No ``flutter_rust_bridge``, Dart, or Flutter dependency anywhere in the workspace
+* ``cargo audit`` — no known CVEs in dependency tree
+
+
+Milestone 2 — ``ccc_dart_plugin`` (separate repository)
+
+*(Planned — not started.  Work begins after Milestone 1 gate passes.)*
+
+A separate Dart/Flutter plugin package repository.  It contains:
+
+* A small Rust bridge crate that references ``ccc_rust`` via git tag:
+
+  .. code-block:: toml
+
+      [dependencies]
+      ccc-crypto-core    = { git = "https://github.com/letusmsg/ccc_rust", tag = "v0.1.0" }
+      ccc-crypto-wolfssl = { git = "https://github.com/letusmsg/ccc_rust", tag = "v0.1.0" }
+      flutter_rust_bridge = "2"
+
+* ``flutter_rust_bridge_codegen generate`` output (``frb_generated.rs``, Dart bindings)
+* Flutter plugin scaffold: ``ios/``, ``android/``, ``macos/``
+* Dart API surface: ``CccCrypto``, ``CccSelfTest``, ``CccProviderCatalog``
+* Flutter integration tests (roundtrip encrypt/decrypt, self-test harness)
+
+
+Milestone 3 — LetUsMsg App Integration (existing repository)
+
+*(Planned — not started.  Work begins after Milestone 2 gate passes.)*
+
+The existing ``letusmsg`` Flutter app adds ``ccc_dart_plugin`` as a pubspec
+dependency.  Changes are confined to:
+
+* ``crypto_wolfssl.dart`` — replace ``UnimplementedError`` stubs with plugin calls
+* ``ccc_provider_spec.dart`` — populate ``CccProviderCatalog`` at runtime
+* ``main.dart`` — call ``CccCrypto.cccInit()`` at startup
+* App debug screen — expose ``CccSelfTest.runAll()`` results
+
+No Rust changes and no bridge changes are made in Milestone 3.
+
+
+Phase 8 — Stretch Goal Providers (Future)
+
+*(Out of scope for Phase 4.  Tracked here for future scheduling.)*
+
+==================  =====================================================
+Library             Rust crate / approach
+==================  =====================================================
+libsodium           ``sodiumoxide`` or ``safe_libsodium``
+OpenSSL             ``openssl`` crate
+BoringSSL           ``boring`` crate
+RustCrypto          Pure-Rust trait impls; no native dep
+liboqs              Open Quantum Safe — ML-KEM, BIKE, HQC, Falcon,
+                    Dilithium, SPHINCS+
+Signal libsignal    ``libsignal`` (Apache-2 subset)
+Botan               ``botan`` crate
+mbedTLS             ``mbedtls`` crate
+Nettle              ``nettle-sys`` crate
+==================  =====================================================
+

docs/ccc_rust_plan_phases.rst

@@ -0,0 +1,264 @@
+==============================================
+CCC Rust Implementation — Phase Tracking
+==============================================
+
+:Last Updated: 2026-02-25
+
+Legend
+------
+
+* ``[ ]`` Not started
+* ``[~]`` In progress
+* ``[x]`` Complete
+* ``[!]`` Blocked
+
+----
+
+Three-Milestone Overview
+------------------------
+
+=============  ===================================  ============================
+Milestone      Repository                           Status
+=============  ===================================  ============================
+**1 (this)**   ``ccc_rust``                         Complete
+**2**          ``ccc_cryptography``                 Not started
+**3**          ``letusmsg`` (existing app)          Not started
+=============  ===================================  ============================
+
+Milestone 1 Verification Gate is now passing.
+Milestone 2 may begin when scheduled.
+Milestone 3 does not start until the Milestone 2 gate passes.
+
+----
+
+============================================================
+Milestone 1 — ``ccc_rust`` Pure Rust Crypto Library
+============================================================
+
+Phase 1 — Cargo Workspace Scaffold
+----------------------------------
+
+* ``[x]`` Create ``Cargo.toml`` (workspace manifest, 3 members — no bridge crate)
+* ``[x]`` Create ``rust-toolchain.toml`` (channel = "stable")
+* ``[x]`` Create ``.cargo/config.toml`` (cross-compile target aliases)
+* ``[x]`` Create ``vendors/README.md``
+
+----
+
+Phase 2 — ``ccc-crypto-core`` Trait Crate
+-----------------------------------------
+
+* ``[x]`` Create ``crates/ccc-crypto-core/Cargo.toml``
+* ``[x]`` ``algorithms.rs`` — AeadAlgorithm, KdfAlgorithm, MacAlgorithm,
+  HashAlgorithm, KemAlgorithm enums (values == cipher_constants.dart)
+* ``[x]`` ``capabilities.rs`` — AlgorithmCapability, ProviderCapabilities
+* ``[x]`` ``error.rs`` — CryptoError enum
+* ``[x]`` ``types.rs`` — KemKeyPair, SelfTestReport, BenchmarkReport,
+  AlgoTestResult
+* ``[x]`` ``provider.rs`` — AeadProvider, KdfProvider, MacProvider,
+  HashProvider, KemProvider traits; CryptoProvider umbrella trait
+* ``[x]`` ``registry.rs`` — ProviderRegistry (OnceLock<Mutex<...>>),
+  register(), get(), list()
+* ``[x]`` ``lib.rs`` — re-exports all public items
+* ``[x]`` Unit tests for registry (5 passing)
+
+----
+
+Phase 3 — wolfSSL Submodule + ``ccc-crypto-wolfssl``
+-----------------------------------------------------
+
+* ``[x]`` ``git submodule add`` wolfSSL → ``vendors/wolfssl``
+* ``[x]`` Pin submodule to ``v5.7.2-stable``
+* ``[x]`` Document pin in ``vendors/README.md``
+* ``[x]`` Create ``crates/ccc-crypto-wolfssl/Cargo.toml``
+* ``[x]`` ``build.rs`` — cmake build + bindgen; stub_ffi feature bypasses C build
+* ``[x]`` ``aead.rs`` — AES-256-GCM implementation
+
+  * ``[x]`` encrypt_aead (AES-256-GCM)
+  * ``[x]`` decrypt_aead (AES-256-GCM)
+  * ``[x]`` encrypt_aead (ChaCha20-Poly1305)
+  * ``[x]`` decrypt_aead (ChaCha20-Poly1305)
+  * ``[x]`` encrypt_aead (XChaCha20-Poly1305 via HChaCha20)
+  * ``[x]`` decrypt_aead (XChaCha20-Poly1305)
+
+* ``[x]`` ``kdf.rs`` — KDF implementations
+
+  * ``[x]`` HKDF-SHA256
+  * ``[x]`` HKDF-SHA384
+  * ``[x]`` HKDF-SHA512
+  * ``[x]`` Argon2id (64 MB / 3 iter / 4 threads — matches DEFAULT_CIPHER_PARAMS)
+  * ``[x]`` BLAKE2b-512 KDF
+
+* ``[x]`` ``mac.rs`` — MAC implementations
+
+  * ``[x]`` HMAC-SHA256
+  * ``[x]`` HMAC-SHA384
+  * ``[x]`` HMAC-SHA512
+  * ``[x]`` BLAKE2b-MAC (keyed)
+  * ``[x]`` Constant-time verify
+
+* ``[x]`` ``hash.rs`` — Hash implementations
+
+  * ``[x]`` SHA-256 / SHA-384 / SHA-512
+  * ``[x]`` SHA3-256 / SHA3-512
+  * ``[x]`` BLAKE2b-512
+
+* ``[x]`` ``kem.rs`` — KEM implementations
+
+  * ``[x]`` X25519 (keygen + DH encap/decap)
+  * ``[x]`` X448 (keygen + DH encap/decap)
+  * ``[ ]`` ML-KEM-768 (deferred to Phase 5)
+  * ``[ ]`` ML-KEM-1024 (deferred to Phase 5)
+  * ``[ ]`` Classic McEliece (deferred to Phase 5)
+
+* ``[x]`` ``capabilities.rs`` — probe-at-startup per algorithm
+* ``[x]`` ``capabilities.rs`` — benchmark() throughput micro-bench
+* ``[x]`` ``provider.rs`` — WolfSslProvider: CryptoProvider impl
+* ``[x]`` ``provider.rs`` — self_test() with embedded NIST vectors (AES-256-GCM, ChaCha20-Poly1305)
+* ``[x]`` Register WolfSslProvider in ProviderRegistry via init()
+* ``[x]`` Full native build verified (cmake builds clean, all conformance tests pass)
+
+----
+
+Phase 4 — Conformance Test Suite
+---------------------------------
+
+* ``[x]`` NIST AES-256-GCM vectors (2 vectors)
+* ``[x]`` RFC 8439 ChaCha20-Poly1305 vectors
+* ``[x]`` RFC 5869 HKDF-SHA256 vectors (2 vectors)
+* ``[x]`` RFC 4231 HMAC-SHA256 vectors (2 vectors)
+* ``[x]`` FIPS hash vectors (SHA-256/512, SHA3-256, BLAKE2b-512)
+* ``[x]`` RFC 7748 X25519 DH test vectors
+* ``[x]`` RFC 7748 X448 DH test vectors
+* ``[x]`` XChaCha20-Poly1305 extended-nonce vectors
+* ``[x]`` ``cargo run -p ccc-conformance-tests`` passes (all current vectors)
+
+----
+
+Phase 5 — Architecture Documentation
+--------------------------------------
+
+* ``[x]`` Create ``docs/ccc_rust_milestone1.rst``
+* ``[x]`` Crate dependency graph (ASCII diagram)
+* ``[x]`` "How to add a new provider" — 7-step trait checklist
+* ``[x]`` ``algo: u32`` → cipher constant mapping table
+* ``[x]`` Milestone 2 hand-off contract documented
+
+----
+
+Milestone 1 Verification Gate
+------------------------------
+
+*All items must be checked before the* ``v0.1.0`` *tag is cut.*
+
+* ``[x]`` ``cargo test --workspace`` — all pass
+* ``[x]`` ``cargo run -p ccc-conformance-tests`` — ALL VECTORS PASSED
+* ``[x]`` ``cargo build --target aarch64-apple-ios`` — success
+* ``[x]`` ``cargo build --target aarch64-linux-android`` — success
+* ``[x]`` No ``flutter_rust_bridge`` / Dart / Flutter dependency in workspace
+* ``[x]`` ``cargo audit`` — no known CVEs
+
+----
+
+============================================================
+Milestone 2 — ``ccc_cryptography`` Flutter Plugin
+===========================================================
+
+*(Not started — begins after Milestone 1 gate passes)*
+
+Phase 1 — New Repository Setup
+-------------------------------
+
+* ``[ ]`` Create ``ccc_cryptography`` repository
+* ``[ ]`` Flutter plugin scaffold (``pubspec.yaml``, ``ios/``, ``android/``, ``macos/``)
+* ``[ ]`` Rust bridge crate with ``crate-type = ["cdylib", "staticlib"]``
+* ``[ ]`` Add ``flutter_rust_bridge = "2"`` dependency
+* ``[ ]`` Reference ``ccc_rust`` via git tag ``v0.1.0``
+
+----
+
+Phase 2 — Bridge Crate
+----------------------
+
+* ``[ ]`` ``dto.rs`` — CapabilitiesDto, KemKeyPairDto, KemEncapDto,
+  SelfTestDto, AlgoTestResultDto; From<core types> impls
+* ``[ ]`` ``bridge.rs`` — ccc_init()
+* ``[ ]`` ``bridge.rs`` — ccc_list_providers()
+* ``[ ]`` ``bridge.rs`` — ccc_capabilities() / ccc_available_algorithms()
+* ``[ ]`` ``bridge.rs`` — ccc_aead_encrypt() / ccc_aead_decrypt()
+* ``[ ]`` ``bridge.rs`` — ccc_kdf_derive()
+* ``[ ]`` ``bridge.rs`` — ccc_mac_compute() / ccc_mac_verify()
+* ``[ ]`` ``bridge.rs`` — ccc_hash()
+* ``[ ]`` ``bridge.rs`` — ccc_kem_generate_keypair()
+* ``[ ]`` ``bridge.rs`` — ccc_kem_encapsulate() / ccc_kem_decapsulate()
+* ``[ ]`` ``bridge.rs`` — ccc_self_test()
+
+----
+
+Phase 3 — Codegen + Plugin Build
+---------------------------------
+
+* ``[ ]`` Run ``flutter_rust_bridge_codegen generate``
+* ``[ ]`` Verify generated Dart bindings compile
+* ``[ ]`` ``flutter build ios`` succeeds (static lib linked)
+* ``[ ]`` ``flutter build apk`` succeeds (cdylib linked)
+* ``[ ]`` ``flutter build macos`` succeeds
+
+----
+
+Phase 4 — Dart API Layer
+------------------------
+
+* ``[ ]`` ``CccCrypto`` class (wraps all bridge calls)
+* ``[ ]`` ``CccSelfTest`` class (wraps ccc_self_test())
+* ``[ ]`` ``CccProviderCatalog`` (runtime-populated from ccc_capabilities())
+
+----
+
+Phase 5 — Flutter Integration Tests
+------------------------------------
+
+* ``[ ]`` Roundtrip encrypt/decrypt 1 KB (AES-256-GCM)
+* ``[ ]`` Roundtrip encrypt/decrypt 1 KB (ChaCha20-Poly1305)
+* ``[ ]`` ``CccSelfTest.runAll()`` — all-pass
+
+----
+
+Milestone 2 Verification Gate
+------------------------------
+
+* ``[ ]`` All Flutter integration tests pass on iOS simulator
+* ``[ ]`` All Flutter integration tests pass on Android emulator
+* ``[ ]`` Package published / tagged ``v0.1.0``
+
+----
+
+============================================================
+Milestone 3 — LetUsMsg App Integration
+============================================================
+
+*(Not started — begins after Milestone 2 gate passes)*
+
+* ``[ ]`` Add ``ccc_cryptography`` to ``letusmsg`` `pubspec.yaml``
+* ``[ ]`` Wire ``crypto_wolfssl.dart`` encrypt/decrypt → bridge calls
+* ``[ ]`` Call ``CccCrypto.cccInit()`` at app startup
+* ``[ ]`` Populate ``CccProviderCatalog`` from runtime capabilities
+* ``[ ]`` Expose ``CccSelfTest.runAll()`` in app debug screen
+* ``[ ]`` End-to-end integration test (send + receive encrypted message)
+
+----
+
+Phase 8 — Stretch Goal Providers (Future)
+------------------------------------------
+
+*(Out of scope for Phase 4.  Tracked here for future scheduling.)*
+
+* ``[ ]`` libsodium (``sodiumoxide`` / ``safe_libsodium``)
+* ``[ ]`` OpenSSL (``openssl`` crate)
+* ``[ ]`` BoringSSL (``boring`` crate)
+* ``[ ]`` RustCrypto (pure-Rust, no native dep)
+* ``[ ]`` liboqs — ML-KEM, BIKE, HQC, Falcon, Dilithium, SPHINCS+
+* ``[ ]`` Signal ``libsignal``
+* ``[ ]`` Botan
+* ``[ ]`` mbedTLS
+* ``[ ]`` Nettle

example/integration_test/ccc_crypto_test.dart

@@ -0,0 +1,414 @@
+// Integration tests for the CccCrypto public API.
+//
+// These exercise every bridge entry point through the clean Dart façade.
+// All tests require the native library, so they run as integration tests
+// via `flutter test integration_test/ccc_crypto_test.dart -d macos`.
+
+import 'dart:convert';
+import 'dart:typed_data';
+
+import 'package:ccc_cryptography/ccc_cryptography.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:integration_test/integration_test.dart';
+
+/// Helper: hex string → Uint8List.
+Uint8List _hex(String hex) {
+  final bytes = <int>[];
+  for (var i = 0; i < hex.length; i += 2) {
+    bytes.add(int.parse(hex.substring(i, i + 2), radix: 16));
+  }
+  return Uint8List.fromList(bytes);
+}
+
+/// Helper: Uint8List → lowercase hex string.
+String _toHex(Uint8List data) =>
+    data.map((b) => b.toRadixString(16).padLeft(2, '0')).join();
+
+void main() {
+  IntegrationTestWidgetsFlutterBinding.ensureInitialized();
+
+  setUpAll(() async {
+    await CccCrypto.init();
+  });
+
+  // ═══════════════════════════════════════════════════════════════════════════
+  // 5.1  AEAD roundtrip — AES-256-GCM
+  // ═══════════════════════════════════════════════════════════════════════════
+  test('5.1 AEAD roundtrip AES-256-GCM', () async {
+    final key = Uint8List(32); // all zeros — fine for a test
+    final nonce = Uint8List(12);
+    final plaintext = Uint8List(1024); // 1 KB of zeros
+    for (var i = 0; i < plaintext.length; i++) {
+      plaintext[i] = i & 0xff;
+    }
+
+    final ciphertext = await CccCrypto.encryptAead(
+      algorithm: CccAeadAlgorithm.aesGcm256,
+      key: key,
+      nonce: nonce,
+      plaintext: plaintext,
+    );
+
+    // Ciphertext must be longer than plaintext (appended auth tag).
+    expect(ciphertext.length, greaterThan(plaintext.length));
+
+    final decrypted = await CccCrypto.decryptAead(
+      algorithm: CccAeadAlgorithm.aesGcm256,
+      key: key,
+      nonce: nonce,
+      ciphertext: ciphertext,
+    );
+
+    expect(decrypted, equals(plaintext));
+  });
+
+  // ═══════════════════════════════════════════════════════════════════════════
+  // 5.2  AEAD roundtrip — ChaCha20-Poly1305
+  // ═══════════════════════════════════════════════════════════════════════════
+  test('5.2 AEAD roundtrip ChaCha20-Poly1305', () async {
+    final key = Uint8List(32);
+    final nonce = Uint8List(12);
+    final plaintext = Uint8List(1024);
+    for (var i = 0; i < plaintext.length; i++) {
+      plaintext[i] = (i * 3) & 0xff;
+    }
+
+    final ciphertext = await CccCrypto.encryptAead(
+      algorithm: CccAeadAlgorithm.chaCha20Poly1305,
+      key: key,
+      nonce: nonce,
+      plaintext: plaintext,
+    );
+
+    expect(ciphertext.length, greaterThan(plaintext.length));
+
+    final decrypted = await CccCrypto.decryptAead(
+      algorithm: CccAeadAlgorithm.chaCha20Poly1305,
+      key: key,
+      nonce: nonce,
+      ciphertext: ciphertext,
+    );
+
+    expect(decrypted, equals(plaintext));
+  });
+
+  // ═══════════════════════════════════════════════════════════════════════════
+  // 5.3  AEAD tamper test — modifying ciphertext fails authentication
+  // ═══════════════════════════════════════════════════════════════════════════
+  test('5.3 AEAD tamper test throws CccAuthenticationFailed', () async {
+    final key = Uint8List(32);
+    final nonce = Uint8List(12);
+    final plaintext = Uint8List.fromList(utf8.encode('Hello, tamper test!'));
+
+    final ciphertext = await CccCrypto.encryptAead(
+      algorithm: CccAeadAlgorithm.aesGcm256,
+      key: key,
+      nonce: nonce,
+      plaintext: plaintext,
+    );
+
+    // Flip a byte in the ciphertext body (not the tag).
+    final tampered = Uint8List.fromList(ciphertext);
+    tampered[0] ^= 0xff;
+
+    expect(
+      () => CccCrypto.decryptAead(
+        algorithm: CccAeadAlgorithm.aesGcm256,
+        key: key,
+        nonce: nonce,
+        ciphertext: tampered,
+      ),
+      throwsA(isA<CccAuthenticationFailed>()),
+    );
+  });
+
+  // ═══════════════════════════════════════════════════════════════════════════
+  // 5.4  KDF known-vector — HKDF-SHA256 (RFC 5869 Test Case 1)
+  // ═══════════════════════════════════════════════════════════════════════════
+  test('5.4 KDF HKDF-SHA256 RFC 5869 Test Case 1', () async {
+    final ikm = _hex('0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b');
+    final salt = _hex('000102030405060708090a0b0c');
+    final info = _hex('f0f1f2f3f4f5f6f7f8f9');
+    const length = 42;
+    final expectedOkm = _hex(
+      '3cb25f25faacd57a90434f64d0362f2a'
+      '2d2d0a90cf1a5a4c5db02d56ecc4c5bf'
+      '34007208d5b887185865',
+    );
+
+    final okm = await CccCrypto.deriveKey(
+      algorithm: CccKdfAlgorithm.sha256,
+      ikm: ikm,
+      salt: salt,
+      info: info,
+      length: length,
+    );
+
+    expect(okm.length, equals(length));
+    expect(_toHex(okm), equals(_toHex(expectedOkm)));
+  });
+
+  // ═══════════════════════════════════════════════════════════════════════════
+  // 5.5  MAC roundtrip — HMAC-SHA256 compute then verify
+  // ═══════════════════════════════════════════════════════════════════════════
+  test('5.5 MAC roundtrip HMAC-SHA256', () async {
+    final key = Uint8List(32);
+    for (var i = 0; i < key.length; i++) {
+      key[i] = i & 0xff;
+    }
+    final data = Uint8List.fromList(utf8.encode('MAC roundtrip test data'));
+
+    final mac = await CccCrypto.computeMac(
+      algorithm: CccMacAlgorithm.hmacSha256,
+      key: key,
+      data: data,
+    );
+
+    // HMAC-SHA256 produces 32-byte tag.
+    expect(mac.length, equals(32));
+
+    final valid = await CccCrypto.verifyMac(
+      algorithm: CccMacAlgorithm.hmacSha256,
+      key: key,
+      data: data,
+      mac: mac,
+    );
+
+    expect(valid, isTrue);
+  });
+
+  // ═══════════════════════════════════════════════════════════════════════════
+  // 5.6  MAC tamper test — modified data fails verification
+  // ═══════════════════════════════════════════════════════════════════════════
+  test('5.6 MAC tamper test returns false', () async {
+    final key = Uint8List(32);
+    final data = Uint8List.fromList(utf8.encode('original data'));
+
+    final mac = await CccCrypto.computeMac(
+      algorithm: CccMacAlgorithm.hmacSha256,
+      key: key,
+      data: data,
+    );
+
+    // Modify the data after MAC was computed.
+    final tamperedData = Uint8List.fromList(utf8.encode('tampered data'));
+
+    final valid = await CccCrypto.verifyMac(
+      algorithm: CccMacAlgorithm.hmacSha256,
+      key: key,
+      data: tamperedData,
+      mac: mac,
+    );
+
+    expect(valid, isFalse);
+  });
+
+  // ═══════════════════════════════════════════════════════════════════════════
+  // 5.7  Hash known-vector — SHA-256 / SHA-384 / SHA-512
+  // ═══════════════════════════════════════════════════════════════════════════
+  test('5.7a Hash SHA-256 known vector', () async {
+    final data = Uint8List.fromList(utf8.encode('abc'));
+    final expected = _hex(
+      'ba7816bf8f01cfea414140de5dae2223'
+      'b00361a396177a9cb410ff61f20015ad',
+    );
+
+    final digest = await CccCrypto.hash(
+      algorithm: CccHashAlgorithm.sha256,
+      data: data,
+    );
+
+    expect(digest.length, equals(32));
+    expect(_toHex(digest), equals(_toHex(expected)));
+  });
+
+  test('5.7b Hash SHA-384 known vector', () async {
+    final data = Uint8List.fromList(utf8.encode('abc'));
+    final expected = _hex(
+      'cb00753f45a35e8bb5a03d699ac65007'
+      '272c32ab0eded1631a8b605a43ff5bed'
+      '8086072ba1e7cc2358baeca134c825a7',
+    );
+
+    final digest = await CccCrypto.hash(
+      algorithm: CccHashAlgorithm.sha384,
+      data: data,
+    );
+
+    expect(digest.length, equals(48));
+    expect(_toHex(digest), equals(_toHex(expected)));
+  });
+
+  test('5.7c Hash SHA-512 known vector', () async {
+    final data = Uint8List.fromList(utf8.encode('abc'));
+    final expected = _hex(
+      'ddaf35a193617abacc417349ae204131'
+      '12e6fa4e89a97ea20a9eeee64b55d39a'
+      '2192992a274fc1a836ba3c23a3feebbd'
+      '454d4423643ce80e2a9ac94fa54ca49f',
+    );
+
+    final digest = await CccCrypto.hash(
+      algorithm: CccHashAlgorithm.sha512,
+      data: data,
+    );
+
+    expect(digest.length, equals(64));
+    expect(_toHex(digest), equals(_toHex(expected)));
+  });
+
+  // ═══════════════════════════════════════════════════════════════════════════
+  // 5.8  KEM roundtrip — X25519
+  // ═══════════════════════════════════════════════════════════════════════════
+  test('5.8 KEM roundtrip X25519', () async {
+    final kp = await CccCrypto.kemGenerateKeypair(
+      algorithm: CccKemAlgorithm.x25519,
+    );
+
+    expect(kp.publicKey.length, equals(32));
+    expect(kp.privateKey.length, equals(32));
+
+    final encap = await CccCrypto.kemEncapsulate(
+      algorithm: CccKemAlgorithm.x25519,
+      publicKey: kp.publicKey,
+    );
+
+    expect(encap.sharedSecret.length, equals(32));
+    expect(encap.ciphertext.length, equals(32));
+
+    final decapSecret = await CccCrypto.kemDecapsulate(
+      algorithm: CccKemAlgorithm.x25519,
+      privateKey: kp.privateKey,
+      ciphertext: encap.ciphertext,
+    );
+
+    expect(decapSecret, equals(encap.sharedSecret));
+  });
+
+  // ═══════════════════════════════════════════════════════════════════════════
+  // 5.9  KEM roundtrip — X448
+  // ═══════════════════════════════════════════════════════════════════════════
+  test('5.9 KEM roundtrip X448', () async {
+    final kp = await CccCrypto.kemGenerateKeypair(
+      algorithm: CccKemAlgorithm.x448,
+    );
+
+    expect(kp.publicKey.length, equals(56));
+    expect(kp.privateKey.length, equals(56));
+
+    final encap = await CccCrypto.kemEncapsulate(
+      algorithm: CccKemAlgorithm.x448,
+      publicKey: kp.publicKey,
+    );
+
+    expect(encap.sharedSecret.length, equals(56));
+    expect(encap.ciphertext.length, equals(56));
+
+    final decapSecret = await CccCrypto.kemDecapsulate(
+      algorithm: CccKemAlgorithm.x448,
+      privateKey: kp.privateKey,
+      ciphertext: encap.ciphertext,
+    );
+
+    expect(decapSecret, equals(encap.sharedSecret));
+  });
+
+  // ═══════════════════════════════════════════════════════════════════════════
+  // 5.10 Provider catalog
+  // ═══════════════════════════════════════════════════════════════════════════
+  test('5.10 Provider catalog', () async {
+    final providers = CccCrypto.listProviders();
+    expect(providers, isNotEmpty);
+    expect(providers, contains('wolfssl'));
+
+    final catalog = await CccCrypto.getCapabilities();
+    expect(catalog.providerName, equals('wolfssl'));
+
+    // Each category should have at least one algorithm.
+    expect(catalog.aead, isNotEmpty);
+    expect(catalog.kdf, isNotEmpty);
+    expect(catalog.mac, isNotEmpty);
+    expect(catalog.hash, isNotEmpty);
+    expect(catalog.kem, isNotEmpty);
+
+    // Check that availability and scores are populated.
+    for (final algo in catalog.availableAead) {
+      expect(algo.name, isNotEmpty);
+      expect(algo.efficiencyScore, greaterThanOrEqualTo(0));
+      expect(algo.reliabilityScore, greaterThanOrEqualTo(0));
+    }
+  });
+
+  // ═══════════════════════════════════════════════════════════════════════════
+  // 5.11 Self-test validation
+  // ═══════════════════════════════════════════════════════════════════════════
+  test('5.11 Self-test validation', () async {
+    final result = await CccCrypto.runSelfTest();
+
+    expect(result.providerName, equals('wolfssl'));
+    expect(result.results, isNotEmpty);
+    expect(result.allPassed, isTrue,
+        reason: 'Failures: ${result.failures.map((r) => '${r.algoName}: ${r.errorMessage}').join(', ')}');
+  });
+
+  // ═══════════════════════════════════════════════════════════════════════════
+  // 5.12 Error handling — typed exceptions
+  // ═══════════════════════════════════════════════════════════════════════════
+  test('5.12a Error: invalid key length throws CccInvalidKey', () async {
+    // AES-256-GCM requires 32-byte key; provide 16 bytes.
+    final shortKey = Uint8List(16);
+    final nonce = Uint8List(12);
+    final plaintext = Uint8List.fromList(utf8.encode('test'));
+
+    expect(
+      () => CccCrypto.encryptAead(
+        algorithm: CccAeadAlgorithm.aesGcm256,
+        key: shortKey,
+        nonce: nonce,
+        plaintext: plaintext,
+      ),
+      throwsA(isA<CccException>()),
+    );
+  });
+
+  test('5.12b Error: invalid nonce length throws CccException', () async {
+    final key = Uint8List(32);
+    // AES-GCM nonce should be 12 bytes; provide 8.
+    final shortNonce = Uint8List(8);
+    final plaintext = Uint8List.fromList(utf8.encode('test'));
+
+    expect(
+      () => CccCrypto.encryptAead(
+        algorithm: CccAeadAlgorithm.aesGcm256,
+        key: key,
+        nonce: shortNonce,
+        plaintext: plaintext,
+      ),
+      throwsA(isA<CccException>()),
+    );
+  });
+
+  // ═══════════════════════════════════════════════════════════════════════════
+  // 5.13 Algorithm ID mapping — enum discriminants match Rust repr(u32)
+  // ═══════════════════════════════════════════════════════════════════════════
+  test('5.13 Algorithm ID mapping', () async {
+    // Verify the catalog reports algorithm IDs matching Rust enum discriminants.
+    final catalog = await CccCrypto.getCapabilities();
+
+    // AEAD: AesGcm256 = 12, ChaCha20Poly1305 = 13, XChaCha20Poly1305 = 14
+    final aeadIds = {for (final a in catalog.aead) a.name: a.id};
+    expect(aeadIds['AES-256-GCM'], equals(12));
+    expect(aeadIds['ChaCha20-Poly1305'], equals(13));
+
+    // Hash: Sha256 = 40, Sha384 = 41, Sha512 = 42
+    final hashIds = {for (final a in catalog.hash) a.name: a.id};
+    expect(hashIds['SHA-256'], equals(40));
+    expect(hashIds['SHA-384'], equals(41));
+    expect(hashIds['SHA-512'], equals(42));
+
+    // KEM: X25519 = 50, X448 = 51
+    final kemIds = {for (final a in catalog.kem) a.name: a.id};
+    expect(kemIds['X25519'], equals(50));
+    expect(kemIds['X448'], equals(51));
+  });
+}

example/ios/Flutter/Debug.xcconfig

@@ -1 +1,2 @@
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
 #include "Generated.xcconfig"

example/ios/Flutter/Release.xcconfig

@@ -1 +1,2 @@
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
 #include "Generated.xcconfig"

example/ios/Podfile

@@ -0,0 +1,43 @@
+# Uncomment this line to define a global platform for your project
+# platform :ios, '13.0'
+
+# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
+ENV['COCOAPODS_DISABLE_STATS'] = 'true'
+
+project 'Runner', {
+  'Debug' => :debug,
+  'Profile' => :release,
+  'Release' => :release,
+}
+
+def flutter_root
+  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
+  unless File.exist?(generated_xcode_build_settings_path)
+    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
+  end
+
+  File.foreach(generated_xcode_build_settings_path) do |line|
+    matches = line.match(/FLUTTER_ROOT\=(.*)/)
+    return matches[1].strip if matches
+  end
+  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
+end
+
+require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)
+
+flutter_ios_podfile_setup
+
+target 'Runner' do
+  use_frameworks!
+
+  flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
+  target 'RunnerTests' do
+    inherit! :search_paths
+  end
+end
+
+post_install do |installer|
+  installer.pods_project.targets.each do |target|
+    flutter_additional_ios_build_settings(target)
+  end
+end

example/ios/Runner.xcodeproj/project.pbxproj

@@ -14,6 +14,8 @@
 		97C146FC1CF9000F007C117D /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FA1CF9000F007C117D /* Main.storyboard */; };
 		97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };
 		97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */; };
+		B6F5CBF28A5AED1D91C67990 /* Pods_RunnerTests.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = CA91E11C618D9A599FFAA263 /* Pods_RunnerTests.framework */; };
+		EDAD8E7F06F64A81B3A5C0C2 /* Pods_Runner.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = FED151958504C181ACC8B7C1 /* Pods_Runner.framework */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -40,14 +42,17 @@
 /* End PBXCopyFilesBuildPhase section */
 
 /* Begin PBXFileReference section */
+		10458A559A1BAA9A40196C6D /* Pods-Runner.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.debug.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"; sourceTree = "<group>"; };
 		1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = GeneratedPluginRegistrant.h; sourceTree = "<group>"; };
 		1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GeneratedPluginRegistrant.m; sourceTree = "<group>"; };
 		331C807B294A618700263BE5 /* RunnerTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RunnerTests.swift; sourceTree = "<group>"; };
 		331C8081294A63A400263BE5 /* RunnerTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = RunnerTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; name = AppFrameworkInfo.plist; path = Flutter/AppFrameworkInfo.plist; sourceTree = "<group>"; };
+		4AF37E1D71E0F25D8BA5F8FD /* Pods-RunnerTests.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RunnerTests.debug.xcconfig"; path = "Target Support Files/Pods-RunnerTests/Pods-RunnerTests.debug.xcconfig"; sourceTree = "<group>"; };
 		74858FAD1ED2DC5600515810 /* Runner-Bridging-Header.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "Runner-Bridging-Header.h"; sourceTree = "<group>"; };
 		74858FAE1ED2DC5600515810 /* AppDelegate.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
 		7AFA3C8E1D35360C0083082E /* Release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = Release.xcconfig; path = Flutter/Release.xcconfig; sourceTree = "<group>"; };
+		906E8CF8E280ABC053ECC0A2 /* Pods-RunnerTests.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RunnerTests.release.xcconfig"; path = "Target Support Files/Pods-RunnerTests/Pods-RunnerTests.release.xcconfig"; sourceTree = "<group>"; };
 		9740EEB21CF90195004384FC /* Debug.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; name = Debug.xcconfig; path = Flutter/Debug.xcconfig; sourceTree = "<group>"; };
 		9740EEB31CF90195004384FC /* Generated.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; name = Generated.xcconfig; path = Flutter/Generated.xcconfig; sourceTree = "<group>"; };
 		97C146EE1CF9000F007C117D /* Runner.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Runner.app; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -55,6 +60,11 @@
 		97C146FD1CF9000F007C117D /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 		97C147001CF9000F007C117D /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
 		97C147021CF9000F007C117D /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		CA91E11C618D9A599FFAA263 /* Pods_RunnerTests.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_RunnerTests.framework; sourceTree = BUILT_PRODUCTS_DIR; };
+		D47ACED1129408D2F3AF66D0 /* Pods-RunnerTests.profile.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RunnerTests.profile.xcconfig"; path = "Target Support Files/Pods-RunnerTests/Pods-RunnerTests.profile.xcconfig"; sourceTree = "<group>"; };
+		DA2CEF79122E98943D4DD5F3 /* Pods-Runner.profile.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.profile.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig"; sourceTree = "<group>"; };
+		E28B19D3AE6076D6F92EDB36 /* Pods-Runner.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.release.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"; sourceTree = "<group>"; };
+		FED151958504C181ACC8B7C1 /* Pods_Runner.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_Runner.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -62,6 +72,15 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				EDAD8E7F06F64A81B3A5C0C2 /* Pods_Runner.framework in Frameworks */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+		C16C09A3B0FC34A2C018419D /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				B6F5CBF28A5AED1D91C67990 /* Pods_RunnerTests.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -76,6 +95,15 @@
 			path = RunnerTests;
 			sourceTree = "<group>";
 		};
+		3411DCCD962964321A55906E /* Frameworks */ = {
+			isa = PBXGroup;
+			children = (
+				FED151958504C181ACC8B7C1 /* Pods_Runner.framework */,
+				CA91E11C618D9A599FFAA263 /* Pods_RunnerTests.framework */,
+			);
+			name = Frameworks;
+			sourceTree = "<group>";
+		};
 		9740EEB11CF90186004384FC /* Flutter */ = {
 			isa = PBXGroup;
 			children = (
@@ -94,6 +122,8 @@
 				97C146F01CF9000F007C117D /* Runner */,
 				97C146EF1CF9000F007C117D /* Products */,
 				331C8082294A63A400263BE5 /* RunnerTests */,
+				B594E4F1914A4F3EB9181D75 /* Pods */,
+				3411DCCD962964321A55906E /* Frameworks */,
 			);
 			sourceTree = "<group>";
 		};
@@ -121,6 +151,20 @@
 			path = Runner;
 			sourceTree = "<group>";
 		};
+		B594E4F1914A4F3EB9181D75 /* Pods */ = {
+			isa = PBXGroup;
+			children = (
+				10458A559A1BAA9A40196C6D /* Pods-Runner.debug.xcconfig */,
+				E28B19D3AE6076D6F92EDB36 /* Pods-Runner.release.xcconfig */,
+				DA2CEF79122E98943D4DD5F3 /* Pods-Runner.profile.xcconfig */,
+				4AF37E1D71E0F25D8BA5F8FD /* Pods-RunnerTests.debug.xcconfig */,
+				906E8CF8E280ABC053ECC0A2 /* Pods-RunnerTests.release.xcconfig */,
+				D47ACED1129408D2F3AF66D0 /* Pods-RunnerTests.profile.xcconfig */,
+			);
+			name = Pods;
+			path = Pods;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
@@ -128,8 +172,10 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 331C8087294A63A400263BE5 /* Build configuration list for PBXNativeTarget "RunnerTests" */;
 			buildPhases = (
+				53A6DF3E8C78EC92FF484B14 /* [CP] Check Pods Manifest.lock */,
 				331C807D294A63A400263BE5 /* Sources */,
 				331C807F294A63A400263BE5 /* Resources */,
+				C16C09A3B0FC34A2C018419D /* Frameworks */,
 			);
 			buildRules = (
 			);
@@ -145,12 +191,14 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 97C147051CF9000F007C117D /* Build configuration list for PBXNativeTarget "Runner" */;
 			buildPhases = (
+				77834BA3CCE54739B52F93C3 /* [CP] Check Pods Manifest.lock */,
 				9740EEB61CF901F6004384FC /* Run Script */,
 				97C146EA1CF9000F007C117D /* Sources */,
 				97C146EB1CF9000F007C117D /* Frameworks */,
 				97C146EC1CF9000F007C117D /* Resources */,
 				9705A1C41CF9048500538489 /* Embed Frameworks */,
 				3B06AD1E1E4923F5004D2608 /* Thin Binary */,
+				C9725E95439E143BF1E75A7A /* [CP] Embed Pods Frameworks */,
 			);
 			buildRules = (
 			);
@@ -238,6 +286,50 @@
 			shellPath = /bin/sh;
 			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" embed_and_thin";
 		};
+		53A6DF3E8C78EC92FF484B14 /* [CP] Check Pods Manifest.lock */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+				"${PODS_PODFILE_DIR_PATH}/Podfile.lock",
+				"${PODS_ROOT}/Manifest.lock",
+			);
+			name = "[CP] Check Pods Manifest.lock";
+			outputFileListPaths = (
+			);
+			outputPaths = (
+				"$(DERIVED_FILE_DIR)/Pods-RunnerTests-checkManifestLockResult.txt",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
+			showEnvVarsInLog = 0;
+		};
+		77834BA3CCE54739B52F93C3 /* [CP] Check Pods Manifest.lock */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+				"${PODS_PODFILE_DIR_PATH}/Podfile.lock",
+				"${PODS_ROOT}/Manifest.lock",
+			);
+			name = "[CP] Check Pods Manifest.lock";
+			outputFileListPaths = (
+			);
+			outputPaths = (
+				"$(DERIVED_FILE_DIR)/Pods-Runner-checkManifestLockResult.txt",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
+			showEnvVarsInLog = 0;
+		};
 		9740EEB61CF901F6004384FC /* Run Script */ = {
 			isa = PBXShellScriptBuildPhase;
 			alwaysOutOfDate = 1;
@@ -253,6 +345,23 @@
 			shellPath = /bin/sh;
 			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" build";
 		};
+		C9725E95439E143BF1E75A7A /* [CP] Embed Pods Frameworks */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks-${CONFIGURATION}-input-files.xcfilelist",
+			);
+			name = "[CP] Embed Pods Frameworks";
+			outputFileListPaths = (
+				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks-${CONFIGURATION}-output-files.xcfilelist",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh\"\n";
+			showEnvVarsInLog = 0;
+		};
 /* End PBXShellScriptBuildPhase section */
 
 /* Begin PBXSourcesBuildPhase section */
@@ -379,6 +488,7 @@
 		};
 		331C8088294A63A400263BE5 /* Debug */ = {
 			isa = XCBuildConfiguration;
+			baseConfigurationReference = 4AF37E1D71E0F25D8BA5F8FD /* Pods-RunnerTests.debug.xcconfig */;
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
@@ -396,6 +506,7 @@
 		};
 		331C8089294A63A400263BE5 /* Release */ = {
 			isa = XCBuildConfiguration;
+			baseConfigurationReference = 906E8CF8E280ABC053ECC0A2 /* Pods-RunnerTests.release.xcconfig */;
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
@@ -411,6 +522,7 @@
 		};
 		331C808A294A63A400263BE5 /* Profile */ = {
 			isa = XCBuildConfiguration;
+			baseConfigurationReference = D47ACED1129408D2F3AF66D0 /* Pods-RunnerTests.profile.xcconfig */;
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;

example/ios/Runner.xcworkspace/contents.xcworkspacedata

@@ -4,4 +4,7 @@
    <FileRef
       location = "group:Runner.xcodeproj">
    </FileRef>
+   <FileRef
+      location = "group:Pods/Pods.xcodeproj">
+   </FileRef>
 </Workspace>

example/lib/main.dart

@@ -1,9 +1,9 @@
 import 'package:flutter/material.dart';
-import 'dart:async';
+import 'package:ccc_cryptography/ccc_cryptography.dart';
 
-import 'package:ccc_cryptography/ccc_cryptography.dart' as ccc_cryptography;
+Future<void> main() async {
-
+  WidgetsFlutterBinding.ensureInitialized();
-void main() {
+  await CccCrypto.init();
   runApp(const MyApp());
 }
 
@@ -15,58 +15,36 @@ class MyApp extends StatefulWidget {
 }
 
 class _MyAppState extends State<MyApp> {
-  late int sumResult;
+  String _status = 'Running self-test…';
-  late Future<int> sumAsyncResult;
 
   @override
   void initState() {
     super.initState();
-    sumResult = ccc_cryptography.sum(1, 2);
+    _runSelfTest();
-    sumAsyncResult = ccc_cryptography.sumAsync(3, 4);
+  }
+
+  Future<void> _runSelfTest() async {
+    try {
+      final result = await CccCrypto.runSelfTest();
+      final providers = CccCrypto.listProviders();
+      setState(() {
+        _status = 'Providers: ${providers.join(", ")}\n'
+            'Self-test: ${result.allPassed ? "ALL PASSED" : "FAILED"}\n'
+            '${result.results.map((r) => '  ${r.algoName}: ${r.passed ? "✓" : "✗ ${r.errorMessage}"}').join("\n")}';
+      });
+    } on CccException catch (e) {
+      setState(() => _status = 'Error: $e');
+    }
   }
 
   @override
   Widget build(BuildContext context) {
-    const textStyle = TextStyle(fontSize: 25);
-    const spacerSmall = SizedBox(height: 10);
     return MaterialApp(
       home: Scaffold(
-        appBar: AppBar(
+        appBar: AppBar(title: const Text('ccc_cryptography')),
-          title: const Text('Native Packages'),
+        body: Padding(
-        ),
+          padding: const EdgeInsets.all(16),
-        body: SingleChildScrollView(
+          child: Text(_status, style: const TextStyle(fontSize: 16)),
-          child: Container(
-            padding: const .all(10),
-            child: Column(
-              children: [
-                const Text(
-                  'This calls a native function through FFI that is shipped as source in the package. '
-                  'The native code is built as part of the Flutter Runner build.',
-                  style: textStyle,
-                  textAlign: .center,
-                ),
-                spacerSmall,
-                Text(
-                  'sum(1, 2) = $sumResult',
-                  style: textStyle,
-                  textAlign: .center,
-                ),
-                spacerSmall,
-                FutureBuilder<int>(
-                  future: sumAsyncResult,
-                  builder: (BuildContext context, AsyncSnapshot<int> value) {
-                    final displayValue =
-                        (value.hasData) ? value.data : 'loading';
-                    return Text(
-                      'await sumAsync(3, 4) = $displayValue',
-                      style: textStyle,
-                      textAlign: .center,
-                    );
-                  },
-                ),
-              ],
-            ),
-          ),
         ),
       ),
     );

example/macos/Flutter/Flutter-Debug.xcconfig

@@ -1 +1,2 @@
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
 #include "ephemeral/Flutter-Generated.xcconfig"

example/macos/Flutter/Flutter-Release.xcconfig

@@ -1 +1,2 @@
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
 #include "ephemeral/Flutter-Generated.xcconfig"

example/macos/Podfile

@@ -0,0 +1,42 @@
+platform :osx, '10.15'
+
+# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
+ENV['COCOAPODS_DISABLE_STATS'] = 'true'
+
+project 'Runner', {
+  'Debug' => :debug,
+  'Profile' => :release,
+  'Release' => :release,
+}
+
+def flutter_root
+  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'ephemeral', 'Flutter-Generated.xcconfig'), __FILE__)
+  unless File.exist?(generated_xcode_build_settings_path)
+    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure \"flutter pub get\" is executed first"
+  end
+
+  File.foreach(generated_xcode_build_settings_path) do |line|
+    matches = line.match(/FLUTTER_ROOT\=(.*)/)
+    return matches[1].strip if matches
+  end
+  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Flutter-Generated.xcconfig, then run \"flutter pub get\""
+end
+
+require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)
+
+flutter_macos_podfile_setup
+
+target 'Runner' do
+  use_frameworks!
+
+  flutter_install_all_macos_pods File.dirname(File.realpath(__FILE__))
+  target 'RunnerTests' do
+    inherit! :search_paths
+  end
+end
+
+post_install do |installer|
+  installer.pods_project.targets.each do |target|
+    flutter_additional_macos_build_settings(target)
+  end
+end

example/macos/Runner.xcodeproj/project.pbxproj

@@ -27,6 +27,8 @@
 		33CC10F32044A3C60003C045 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 33CC10F22044A3C60003C045 /* Assets.xcassets */; };
 		33CC10F62044A3C60003C045 /* MainMenu.xib in Resources */ = {isa = PBXBuildFile; fileRef = 33CC10F42044A3C60003C045 /* MainMenu.xib */; };
 		33CC11132044BFA00003C045 /* MainFlutterWindow.swift in Sources */ = {isa = PBXBuildFile; fileRef = 33CC11122044BFA00003C045 /* MainFlutterWindow.swift */; };
+		C9D9D80953306779817A01D7 /* Pods_Runner.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 038972E62E6D13C2A55A0B7F /* Pods_Runner.framework */; };
+		CC6FDE117C14C0F98D1BA8BB /* Pods_RunnerTests.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = D5AA6C665A590100A722C2D2 /* Pods_RunnerTests.framework */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -60,11 +62,13 @@
 /* End PBXCopyFilesBuildPhase section */
 
 /* Begin PBXFileReference section */
+		038972E62E6D13C2A55A0B7F /* Pods_Runner.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_Runner.framework; sourceTree = BUILT_PRODUCTS_DIR; };
+		0988C826A2FD255462F9808A /* Pods-Runner.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.debug.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"; sourceTree = "<group>"; };
 		331C80D5294CF71000263BE5 /* RunnerTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = RunnerTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		331C80D7294CF71000263BE5 /* RunnerTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RunnerTests.swift; sourceTree = "<group>"; };
 		333000ED22D3DE5D00554162 /* Warnings.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = Warnings.xcconfig; sourceTree = "<group>"; };
 		335BBD1A22A9A15E00E9071D /* GeneratedPluginRegistrant.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = GeneratedPluginRegistrant.swift; sourceTree = "<group>"; };
-		33CC10ED2044A3C60003C045 /* ccc_cryptography_example.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = "ccc_cryptography_example.app"; sourceTree = BUILT_PRODUCTS_DIR; };
+		33CC10ED2044A3C60003C045 /* ccc_cryptography_example.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = ccc_cryptography_example.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		33CC10F02044A3C60003C045 /* AppDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
 		33CC10F22044A3C60003C045 /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; name = Assets.xcassets; path = Runner/Assets.xcassets; sourceTree = "<group>"; };
 		33CC10F52044A3C60003C045 /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.xib; name = Base; path = Base.lproj/MainMenu.xib; sourceTree = "<group>"; };
@@ -77,7 +81,13 @@
 		33E51914231749380026EE4D /* Release.entitlements */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.entitlements; path = Release.entitlements; sourceTree = "<group>"; };
 		33E5194F232828860026EE4D /* AppInfo.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = AppInfo.xcconfig; sourceTree = "<group>"; };
 		7AFA3C8E1D35360C0083082E /* Release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = Release.xcconfig; sourceTree = "<group>"; };
+		86D70DA30699567E710A0459 /* Pods-Runner.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.release.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"; sourceTree = "<group>"; };
 		9740EEB21CF90195004384FC /* Debug.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; path = Debug.xcconfig; sourceTree = "<group>"; };
+		9D35F14235952B671983F7E0 /* Pods-RunnerTests.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RunnerTests.release.xcconfig"; path = "Target Support Files/Pods-RunnerTests/Pods-RunnerTests.release.xcconfig"; sourceTree = "<group>"; };
+		A5B81D3E19756CB2D0C8B009 /* Pods-RunnerTests.profile.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RunnerTests.profile.xcconfig"; path = "Target Support Files/Pods-RunnerTests/Pods-RunnerTests.profile.xcconfig"; sourceTree = "<group>"; };
+		A81A44EB7B90A16EAADE4FA6 /* Pods-RunnerTests.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RunnerTests.debug.xcconfig"; path = "Target Support Files/Pods-RunnerTests/Pods-RunnerTests.debug.xcconfig"; sourceTree = "<group>"; };
+		BA626D8003BA6E48536EE306 /* Pods-Runner.profile.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.profile.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig"; sourceTree = "<group>"; };
+		D5AA6C665A590100A722C2D2 /* Pods_RunnerTests.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_RunnerTests.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -85,6 +95,7 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				CC6FDE117C14C0F98D1BA8BB /* Pods_RunnerTests.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -92,6 +103,7 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				C9D9D80953306779817A01D7 /* Pods_Runner.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -125,6 +137,7 @@
 				331C80D6294CF71000263BE5 /* RunnerTests */,
 				33CC10EE2044A3C60003C045 /* Products */,
 				D73912EC22F37F3D000D13A0 /* Frameworks */,
+				DE0D4D416823266B5CAAEDA7 /* Pods */,
 			);
 			sourceTree = "<group>";
 		};
@@ -175,10 +188,26 @@
 		D73912EC22F37F3D000D13A0 /* Frameworks */ = {
 			isa = PBXGroup;
 			children = (
+				038972E62E6D13C2A55A0B7F /* Pods_Runner.framework */,
+				D5AA6C665A590100A722C2D2 /* Pods_RunnerTests.framework */,
 			);
 			name = Frameworks;
 			sourceTree = "<group>";
 		};
+		DE0D4D416823266B5CAAEDA7 /* Pods */ = {
+			isa = PBXGroup;
+			children = (
+				0988C826A2FD255462F9808A /* Pods-Runner.debug.xcconfig */,
+				86D70DA30699567E710A0459 /* Pods-Runner.release.xcconfig */,
+				BA626D8003BA6E48536EE306 /* Pods-Runner.profile.xcconfig */,
+				A81A44EB7B90A16EAADE4FA6 /* Pods-RunnerTests.debug.xcconfig */,
+				9D35F14235952B671983F7E0 /* Pods-RunnerTests.release.xcconfig */,
+				A5B81D3E19756CB2D0C8B009 /* Pods-RunnerTests.profile.xcconfig */,
+			);
+			name = Pods;
+			path = Pods;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
@@ -186,6 +215,7 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 331C80DE294CF71000263BE5 /* Build configuration list for PBXNativeTarget "RunnerTests" */;
 			buildPhases = (
+				086D907707E0A9BB81BA038A /* [CP] Check Pods Manifest.lock */,
 				331C80D1294CF70F00263BE5 /* Sources */,
 				331C80D2294CF70F00263BE5 /* Frameworks */,
 				331C80D3294CF70F00263BE5 /* Resources */,
@@ -204,11 +234,13 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 33CC10FB2044A3C60003C045 /* Build configuration list for PBXNativeTarget "Runner" */;
 			buildPhases = (
+				C86250B37FA1453AAEC9A1C2 /* [CP] Check Pods Manifest.lock */,
 				33CC10E92044A3C60003C045 /* Sources */,
 				33CC10EA2044A3C60003C045 /* Frameworks */,
 				33CC10EB2044A3C60003C045 /* Resources */,
 				33CC110E2044A8840003C045 /* Bundle Framework */,
 				3399D490228B24CF009A79C7 /* ShellScript */,
+				78F7E7C7FE2E75BBB3819847 /* [CP] Embed Pods Frameworks */,
 			);
 			buildRules = (
 			);
@@ -291,6 +323,28 @@
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXShellScriptBuildPhase section */
+		086D907707E0A9BB81BA038A /* [CP] Check Pods Manifest.lock */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+				"${PODS_PODFILE_DIR_PATH}/Podfile.lock",
+				"${PODS_ROOT}/Manifest.lock",
+			);
+			name = "[CP] Check Pods Manifest.lock";
+			outputFileListPaths = (
+			);
+			outputPaths = (
+				"$(DERIVED_FILE_DIR)/Pods-RunnerTests-checkManifestLockResult.txt",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
+			showEnvVarsInLog = 0;
+		};
 		3399D490228B24CF009A79C7 /* ShellScript */ = {
 			isa = PBXShellScriptBuildPhase;
 			alwaysOutOfDate = 1;
@@ -329,6 +383,45 @@
 			shellPath = /bin/sh;
 			shellScript = "\"$FLUTTER_ROOT\"/packages/flutter_tools/bin/macos_assemble.sh && touch Flutter/ephemeral/tripwire";
 		};
+		78F7E7C7FE2E75BBB3819847 /* [CP] Embed Pods Frameworks */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks-${CONFIGURATION}-input-files.xcfilelist",
+			);
+			name = "[CP] Embed Pods Frameworks";
+			outputFileListPaths = (
+				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks-${CONFIGURATION}-output-files.xcfilelist",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh\"\n";
+			showEnvVarsInLog = 0;
+		};
+		C86250B37FA1453AAEC9A1C2 /* [CP] Check Pods Manifest.lock */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+				"${PODS_PODFILE_DIR_PATH}/Podfile.lock",
+				"${PODS_ROOT}/Manifest.lock",
+			);
+			name = "[CP] Check Pods Manifest.lock";
+			outputFileListPaths = (
+			);
+			outputPaths = (
+				"$(DERIVED_FILE_DIR)/Pods-Runner-checkManifestLockResult.txt",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
+			showEnvVarsInLog = 0;
+		};
 /* End PBXShellScriptBuildPhase section */
 
 /* Begin PBXSourcesBuildPhase section */
@@ -380,6 +473,7 @@
 /* Begin XCBuildConfiguration section */
 		331C80DB294CF71000263BE5 /* Debug */ = {
 			isa = XCBuildConfiguration;
+			baseConfigurationReference = A81A44EB7B90A16EAADE4FA6 /* Pods-RunnerTests.debug.xcconfig */;
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CURRENT_PROJECT_VERSION = 1;
@@ -394,6 +488,7 @@
 		};
 		331C80DC294CF71000263BE5 /* Release */ = {
 			isa = XCBuildConfiguration;
+			baseConfigurationReference = 9D35F14235952B671983F7E0 /* Pods-RunnerTests.release.xcconfig */;
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CURRENT_PROJECT_VERSION = 1;
@@ -408,6 +503,7 @@
 		};
 		331C80DD294CF71000263BE5 /* Profile */ = {
 			isa = XCBuildConfiguration;
+			baseConfigurationReference = A5B81D3E19756CB2D0C8B009 /* Pods-RunnerTests.profile.xcconfig */;
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CURRENT_PROJECT_VERSION = 1;

example/macos/Runner.xcworkspace/contents.xcworkspacedata

@@ -4,4 +4,7 @@
    <FileRef
       location = "group:Runner.xcodeproj">
    </FileRef>
+   <FileRef
+      location = "group:Pods/Pods.xcodeproj">
+   </FileRef>
 </Workspace>

example/pubspec.yaml

@@ -53,6 +53,8 @@ dev_dependencies:
   # package. See that file for information about deactivating specific lint
   # rules and activating additional ones.
   flutter_lints: ^6.0.0
+  integration_test:
+    sdk: flutter
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec

example/test_driver/integration_test.dart

@@ -0,0 +1,3 @@
+import 'package:integration_test/integration_test_driver.dart';
+
+Future<void> main() => integrationDriver();

ffigen.yaml

@@ -1,19 +0,0 @@
-# Run with `dart run ffigen --config ffigen.yaml`.
-name: CccCryptographyBindings
-description: |
-  Bindings for `src/ccc_cryptography.h`.
-
-  Regenerate bindings with `dart run ffigen --config ffigen.yaml`.
-output: 'lib/ccc_cryptography_bindings_generated.dart'
-headers:
-  entry-points:
-    - 'src/ccc_cryptography.h'
-  include-directives:
-    - 'src/ccc_cryptography.h'
-preamble: |
-  // ignore_for_file: always_specify_types
-  // ignore_for_file: camel_case_types
-  // ignore_for_file: non_constant_identifier_names
-comments:
-  style: any
-  length: full

flutter_rust_bridge.yaml

@@ -0,0 +1,3 @@
+rust_input: crate::api
+dart_output: lib/src/rust
+rust_root: rust/

ios/Classes/ccc_cryptography.c

@@ -1,3 +0,0 @@
-// Relative import to be able to reuse the C sources.
-// See the comment in ../ccc_cryptography.podspec for more information.
-#include "../../src/ccc_cryptography.c"

ios/Classes/dummy_file.c

@@ -0,0 +1 @@
+// This is an empty file to force CocoaPods to create a framework.

ios/ccc_cryptography.podspec

@@ -20,9 +20,26 @@ A new Flutter FFI plugin project.
   s.source           = { :path => '.' }
   s.source_files = 'Classes/**/*'
   s.dependency 'Flutter'
-  s.platform = :ios, '13.0'
+  s.platform = :ios, '11.0'
 
   # Flutter.framework does not contain a i386 slice.
   s.pod_target_xcconfig = { 'DEFINES_MODULE' => 'YES', 'EXCLUDED_ARCHS[sdk=iphonesimulator*]' => 'i386' }
   s.swift_version = '5.0'
-end
+
+  s.script_phase = {
+    :name => 'Build Rust library',
+    # First argument is relative path to the `rust` folder, second is name of rust library
+    :script => 'sh "$PODS_TARGET_SRCROOT/../cargokit/build_pod.sh" ../rust ccc_cryptography',
+    :execution_position => :before_compile,
+    :input_files => ['${BUILT_PRODUCTS_DIR}/cargokit_phony'],
+    # Let XCode know that the static library referenced in -force_load below is
+    # created by this build step.
+    :output_files => ["${BUILT_PRODUCTS_DIR}/libccc_cryptography.a"],
+  }
+  s.pod_target_xcconfig = {
+    'DEFINES_MODULE' => 'YES',
+    # Flutter.framework does not contain a i386 slice.
+    'EXCLUDED_ARCHS[sdk=iphonesimulator*]' => 'i386',
+    'OTHER_LDFLAGS' => '-force_load ${BUILT_PRODUCTS_DIR}/libccc_cryptography.a',
+  }
+end

lib/ccc_crypto.dart

@@ -0,0 +1,235 @@
+/// Primary entry point for CCC cryptographic operations.
+///
+/// All methods delegate to the Rust bridge via `flutter_rust_bridge`.
+/// No cryptographic logic exists in Dart.
+///
+/// Usage:
+/// ```dart
+/// await CccCrypto.init();
+/// final ct = await CccCrypto.encryptAead(
+///   algorithm: CccAeadAlgorithm.aesGcm256,
+///   key: key,
+///   nonce: nonce,
+///   plaintext: data,
+///   aad: Uint8List(0),
+/// );
+/// ```
+library;
+
+import 'dart:typed_data';
+
+import 'package:ccc_cryptography/ccc_exceptions.dart';
+import 'package:ccc_cryptography/ccc_provider_catalog.dart';
+import 'package:ccc_cryptography/ccc_self_test.dart';
+import 'package:ccc_cryptography/src/rust/api/crypto.dart' as bridge;
+import 'package:ccc_cryptography/src/rust/api/dto.dart';
+import 'package:ccc_cryptography/src/rust/frb_generated.dart';
+
+/// Static façade for all CCC cryptographic operations.
+///
+/// Call [init] once at application startup before using any other method.
+abstract final class CccCrypto {
+  /// Initialise the FRB runtime and register the wolfSSL provider.
+  ///
+  /// Must be called once before any other [CccCrypto] method.
+  /// Safe to call multiple times (idempotent).
+  static Future<void> init() async {
+    await RustLib.init();
+    await bridge.cccInit();
+  }
+
+  // ── Provider info ────────────────────────────────────────────────────────
+
+  /// Return the names of all registered crypto providers.
+  static List<String> listProviders() => bridge.cccListProviders();
+
+  /// Return the capability catalog for the default provider.
+  static Future<CccProviderCatalog> getCapabilities() async {
+    try {
+      final caps = await bridge.cccCapabilities();
+      return CccProviderCatalog.fromCapabilities(caps);
+    } on CccCryptoError catch (e) {
+      throw CccException.from(e);
+    }
+  }
+
+  // ── AEAD ─────────────────────────────────────────────────────────────────
+
+  /// Encrypt [plaintext] with an AEAD algorithm.
+  ///
+  /// Returns ciphertext with appended authentication tag.
+  static Future<Uint8List> encryptAead({
+    required CccAeadAlgorithm algorithm,
+    required Uint8List key,
+    required Uint8List nonce,
+    required Uint8List plaintext,
+    Uint8List? aad,
+  }) async {
+    try {
+      return await bridge.cccAeadEncrypt(
+        algorithm: algorithm,
+        key: key,
+        nonce: nonce,
+        plaintext: plaintext,
+        aad: aad ?? Uint8List(0),
+      );
+    } on CccCryptoError catch (e) {
+      throw CccException.from(e);
+    }
+  }
+
+  /// Decrypt [ciphertext] (with appended tag) using an AEAD algorithm.
+  ///
+  /// Throws [CccAuthenticationFailed] if the tag does not verify.
+  static Future<Uint8List> decryptAead({
+    required CccAeadAlgorithm algorithm,
+    required Uint8List key,
+    required Uint8List nonce,
+    required Uint8List ciphertext,
+    Uint8List? aad,
+  }) async {
+    try {
+      return await bridge.cccAeadDecrypt(
+        algorithm: algorithm,
+        key: key,
+        nonce: nonce,
+        ciphertext: ciphertext,
+        aad: aad ?? Uint8List(0),
+      );
+    } on CccCryptoError catch (e) {
+      throw CccException.from(e);
+    }
+  }
+
+  // ── KDF ──────────────────────────────────────────────────────────────────
+
+  /// Derive key material of [length] bytes.
+  static Future<Uint8List> deriveKey({
+    required CccKdfAlgorithm algorithm,
+    required Uint8List ikm,
+    Uint8List? salt,
+    Uint8List? info,
+    required int length,
+  }) async {
+    try {
+      return await bridge.cccKdfDerive(
+        algorithm: algorithm,
+        ikm: ikm,
+        salt: salt ?? Uint8List(0),
+        info: info ?? Uint8List(0),
+        length: length,
+      );
+    } on CccCryptoError catch (e) {
+      throw CccException.from(e);
+    }
+  }
+
+  // ── MAC ──────────────────────────────────────────────────────────────────
+
+  /// Compute a MAC tag over [data].
+  static Future<Uint8List> computeMac({
+    required CccMacAlgorithm algorithm,
+    required Uint8List key,
+    required Uint8List data,
+  }) async {
+    try {
+      return await bridge.cccMacCompute(
+        algorithm: algorithm,
+        key: key,
+        data: data,
+      );
+    } on CccCryptoError catch (e) {
+      throw CccException.from(e);
+    }
+  }
+
+  /// Verify a MAC tag. Returns `true` if valid, `false` otherwise.
+  static Future<bool> verifyMac({
+    required CccMacAlgorithm algorithm,
+    required Uint8List key,
+    required Uint8List data,
+    required Uint8List mac,
+  }) async {
+    try {
+      return await bridge.cccMacVerify(
+        algorithm: algorithm,
+        key: key,
+        data: data,
+        mac: mac,
+      );
+    } on CccCryptoError catch (e) {
+      throw CccException.from(e);
+    }
+  }
+
+  // ── Hash ─────────────────────────────────────────────────────────────────
+
+  /// Compute a cryptographic hash of [data].
+  static Future<Uint8List> hash({
+    required CccHashAlgorithm algorithm,
+    required Uint8List data,
+  }) async {
+    try {
+      return await bridge.cccHash(algorithm: algorithm, data: data);
+    } on CccCryptoError catch (e) {
+      throw CccException.from(e);
+    }
+  }
+
+  // ── KEM ──────────────────────────────────────────────────────────────────
+
+  /// Generate a KEM key pair.
+  static Future<CccKemKeyPair> kemGenerateKeypair({
+    required CccKemAlgorithm algorithm,
+  }) async {
+    try {
+      return await bridge.cccKemGenerateKeypair(algorithm: algorithm);
+    } on CccCryptoError catch (e) {
+      throw CccException.from(e);
+    }
+  }
+
+  /// KEM encapsulation — produce ciphertext + shared secret from a public key.
+  static Future<CccKemEncapResult> kemEncapsulate({
+    required CccKemAlgorithm algorithm,
+    required Uint8List publicKey,
+  }) async {
+    try {
+      return await bridge.cccKemEncapsulate(
+        algorithm: algorithm,
+        publicKey: publicKey,
+      );
+    } on CccCryptoError catch (e) {
+      throw CccException.from(e);
+    }
+  }
+
+  /// KEM decapsulation — recover shared secret from ciphertext + private key.
+  static Future<Uint8List> kemDecapsulate({
+    required CccKemAlgorithm algorithm,
+    required Uint8List privateKey,
+    required Uint8List ciphertext,
+  }) async {
+    try {
+      return await bridge.cccKemDecapsulate(
+        algorithm: algorithm,
+        privateKey: privateKey,
+        ciphertext: ciphertext,
+      );
+    } on CccCryptoError catch (e) {
+      throw CccException.from(e);
+    }
+  }
+
+  // ── Self-test ────────────────────────────────────────────────────────────
+
+  /// Run the provider self-test suite and return a structured report.
+  static Future<CccSelfTestResult> runSelfTest() async {
+    try {
+      final report = await bridge.cccSelfTest();
+      return CccSelfTestResult.fromReport(report);
+    } on CccCryptoError catch (e) {
+      throw CccException.from(e);
+    }
+  }
+}

lib/ccc_cryptography.dart

@@ -1,131 +1,39 @@
-
+/// CCC Cryptography — Flutter plugin providing cross-platform
-import 'dart:async';
+/// cryptographic operations via `ccc_rust` and `flutter_rust_bridge`.
-import 'dart:ffi';
-import 'dart:io';
-import 'dart:isolate';
-
-import 'ccc_cryptography_bindings_generated.dart';
-
-/// A very short-lived native function.
 ///
-/// For very short-lived functions, it is fine to call them on the main isolate.
+/// Usage:
-/// They will block the Dart execution while running the native function, so
+/// ```dart
-/// only do this for native functions which are guaranteed to be short-lived.
+/// import 'package:ccc_cryptography/ccc_cryptography.dart';
-int sum(int a, int b) => _bindings.sum(a, b);
-
-/// A longer lived native function, which occupies the thread calling it.
 ///
-/// Do not call these kind of native functions in the main isolate. They will
+/// await CccCrypto.init();
-/// block Dart execution. This will cause dropped frames in Flutter applications.
+/// final ct = await CccCrypto.encryptAead(
-/// Instead, call these native functions on a separate isolate.
+///   algorithm: CccAeadAlgorithm.aesGcm256,
-///
+///   key: key, nonce: nonce, plaintext: data,
-/// Modify this to suit your own use case. Example use cases:
+/// );
-///
+/// ```
-/// 1. Reuse a single isolate for various different kinds of requests.
+library;
-/// 2. Use multiple helper isolates for parallel execution.
-Future<int> sumAsync(int a, int b) async {
-  final SendPort helperIsolateSendPort = await _helperIsolateSendPort;
-  final int requestId = _nextSumRequestId++;
-  final _SumRequest request = _SumRequest(requestId, a, b);
-  final Completer<int> completer = Completer<int>();
-  _sumRequests[requestId] = completer;
-  helperIsolateSendPort.send(request);
-  return completer.future;
-}
 
-const String _libName = 'ccc_cryptography';
+// Primary API
+export 'ccc_crypto.dart';
 
-/// The dynamic library in which the symbols for [CccCryptographyBindings] can be found.
+// Algorithm enum re-exports (FRB-generated)
-final DynamicLibrary _dylib = () {
+export 'src/rust/api/dto.dart'
-  if (Platform.isMacOS || Platform.isIOS) {
+    show
-    return DynamicLibrary.open('$_libName.framework/$_libName');
+        CccAeadAlgorithm,
-  }
+        CccKdfAlgorithm,
-  if (Platform.isAndroid || Platform.isLinux) {
+        CccMacAlgorithm,
-    return DynamicLibrary.open('lib$_libName.so');
+        CccHashAlgorithm,
-  }
+        CccKemAlgorithm,
-  if (Platform.isWindows) {
+        CccKemKeyPair,
-    return DynamicLibrary.open('$_libName.dll');
+        CccKemEncapResult;
-  }
-  throw UnsupportedError('Unknown platform: ${Platform.operatingSystem}');
-}();
 
-/// The bindings to the native functions in [_dylib].
+// Exceptions
-final CccCryptographyBindings _bindings = CccCryptographyBindings(_dylib);
+export 'ccc_exceptions.dart';
+
+// Provider catalog
+export 'ccc_provider_catalog.dart';
+
+// Self-test result
+export 'ccc_self_test.dart';
 
 
-/// A request to compute `sum`.
-///
-/// Typically sent from one isolate to another.
-class _SumRequest {
-  final int id;
-  final int a;
-  final int b;
-
-  const _SumRequest(this.id, this.a, this.b);
-}
-
-/// A response with the result of `sum`.
-///
-/// Typically sent from one isolate to another.
-class _SumResponse {
-  final int id;
-  final int result;
-
-  const _SumResponse(this.id, this.result);
-}
-
-/// Counter to identify [_SumRequest]s and [_SumResponse]s.
-int _nextSumRequestId = 0;
-
-/// Mapping from [_SumRequest] `id`s to the completers corresponding to the correct future of the pending request.
-final Map<int, Completer<int>> _sumRequests = <int, Completer<int>>{};
-
-/// The SendPort belonging to the helper isolate.
-Future<SendPort> _helperIsolateSendPort = () async {
-  // The helper isolate is going to send us back a SendPort, which we want to
-  // wait for.
-  final Completer<SendPort> completer = Completer<SendPort>();
-
-  // Receive port on the main isolate to receive messages from the helper.
-  // We receive two types of messages:
-  // 1. A port to send messages on.
-  // 2. Responses to requests we sent.
-  final ReceivePort receivePort = ReceivePort()
-    ..listen((dynamic data) {
-      if (data is SendPort) {
-        // The helper isolate sent us the port on which we can sent it requests.
-        completer.complete(data);
-        return;
-      }
-      if (data is _SumResponse) {
-        // The helper isolate sent us a response to a request we sent.
-        final Completer<int> completer = _sumRequests[data.id]!;
-        _sumRequests.remove(data.id);
-        completer.complete(data.result);
-        return;
-      }
-      throw UnsupportedError('Unsupported message type: ${data.runtimeType}');
-    });
-
-  // Start the helper isolate.
-  await Isolate.spawn((SendPort sendPort) async {
-    final ReceivePort helperReceivePort = ReceivePort()
-      ..listen((dynamic data) {
-        // On the helper isolate listen to requests and respond to them.
-        if (data is _SumRequest) {
-          final int result = _bindings.sum_long_running(data.a, data.b);
-          final _SumResponse response = _SumResponse(data.id, result);
-          sendPort.send(response);
-          return;
-        }
-        throw UnsupportedError('Unsupported message type: ${data.runtimeType}');
-      });
-
-    // Send the port to the main isolate on which we can receive requests.
-    sendPort.send(helperReceivePort.sendPort);
-  }, receivePort.sendPort);
-
-  // Wait until the helper isolate has sent us back the SendPort on which we
-  // can start sending requests.
-  return completer.future;
-}();

lib/ccc_cryptography_bindings_generated.dart

@@ -1,69 +0,0 @@
-// ignore_for_file: always_specify_types
-// ignore_for_file: camel_case_types
-// ignore_for_file: non_constant_identifier_names
-
-// AUTO GENERATED FILE, DO NOT EDIT.
-//
-// Generated by `package:ffigen`.
-// ignore_for_file: type=lint
-import 'dart:ffi' as ffi;
-
-/// Bindings for `src/ccc_cryptography.h`.
-///
-/// Regenerate bindings with `dart run ffigen --config ffigen.yaml`.
-///
-class CccCryptographyBindings {
-  /// Holds the symbol lookup function.
-  final ffi.Pointer<T> Function<T extends ffi.NativeType>(String symbolName)
-      _lookup;
-
-  /// The symbols are looked up in [dynamicLibrary].
-  CccCryptographyBindings(ffi.DynamicLibrary dynamicLibrary)
-      : _lookup = dynamicLibrary.lookup;
-
-  /// The symbols are looked up with [lookup].
-  CccCryptographyBindings.fromLookup(
-      ffi.Pointer<T> Function<T extends ffi.NativeType>(String symbolName)
-          lookup)
-      : _lookup = lookup;
-
-  /// A very short-lived native function.
-  ///
-  /// For very short-lived functions, it is fine to call them on the main isolate.
-  /// They will block the Dart execution while running the native function, so
-  /// only do this for native functions which are guaranteed to be short-lived.
-  int sum(
-    int a,
-    int b,
-  ) {
-    return _sum(
-      a,
-      b,
-    );
-  }
-
-  late final _sumPtr =
-      _lookup<ffi.NativeFunction<ffi.Int Function(ffi.Int, ffi.Int)>>('sum');
-  late final _sum = _sumPtr.asFunction<int Function(int, int)>();
-
-  /// A longer lived native function, which occupies the thread calling it.
-  ///
-  /// Do not call these kind of native functions in the main isolate. They will
-  /// block Dart execution. This will cause dropped frames in Flutter applications.
-  /// Instead, call these native functions on a separate isolate.
-  int sum_long_running(
-    int a,
-    int b,
-  ) {
-    return _sum_long_running(
-      a,
-      b,
-    );
-  }
-
-  late final _sum_long_runningPtr =
-      _lookup<ffi.NativeFunction<ffi.Int Function(ffi.Int, ffi.Int)>>(
-          'sum_long_running');
-  late final _sum_long_running =
-      _sum_long_runningPtr.asFunction<int Function(int, int)>();
-}

lib/ccc_exceptions.dart

@@ -0,0 +1,70 @@
+/// Structured exception classes for CCC cryptographic operations.
+///
+/// These wrap the FRB-generated [CccCryptoError] into typed Dart exceptions
+/// so consuming code can catch specific failure modes.
+library;
+
+import 'package:ccc_cryptography/src/rust/api/dto.dart';
+
+/// Base class for all CCC cryptographic exceptions.
+sealed class CccException implements Exception {
+  /// Human-readable error description.
+  final String message;
+
+  const CccException(this.message);
+
+  @override
+  String toString() => '$runtimeType: $message';
+
+  /// Convert a FRB-generated [CccCryptoError] into the appropriate
+  /// typed [CccException] subclass.
+  factory CccException.from(CccCryptoError error) {
+    return switch (error) {
+      CccCryptoError_UnsupportedAlgorithm(:final field0) =>
+        CccUnsupportedAlgorithm(field0),
+      CccCryptoError_InvalidKey(:final field0) => CccInvalidKey(field0),
+      CccCryptoError_InvalidNonce(:final field0) => CccInvalidNonce(field0),
+      CccCryptoError_AuthenticationFailed() =>
+        const CccAuthenticationFailed(),
+      CccCryptoError_InvalidInput(:final field0) => CccInvalidInput(field0),
+      CccCryptoError_FeatureNotCompiled(:final field0) =>
+        CccFeatureNotCompiled(field0),
+      CccCryptoError_InternalError(:final field0) => CccInternalError(field0),
+    };
+  }
+}
+
+/// The requested algorithm is not supported by any registered provider.
+class CccUnsupportedAlgorithm extends CccException {
+  const CccUnsupportedAlgorithm(super.message);
+}
+
+/// The supplied key is invalid (wrong length, weak key, etc.).
+class CccInvalidKey extends CccException {
+  const CccInvalidKey(super.message);
+}
+
+/// The supplied nonce/IV is invalid (wrong length, reuse detected, etc.).
+class CccInvalidNonce extends CccException {
+  const CccInvalidNonce(super.message);
+}
+
+/// AEAD authentication tag verification failed — ciphertext was tampered.
+class CccAuthenticationFailed extends CccException {
+  const CccAuthenticationFailed() : super('authentication failed');
+}
+
+/// The supplied input data is invalid.
+class CccInvalidInput extends CccException {
+  const CccInvalidInput(super.message);
+}
+
+/// The requested feature/algorithm is not compiled into the provider.
+class CccFeatureNotCompiled extends CccException {
+  const CccFeatureNotCompiled(super.message);
+}
+
+/// An unexpected internal error occurred in the cryptographic provider.
+class CccInternalError extends CccException {
+  const CccInternalError(super.message);
+}

lib/ccc_provider_catalog.dart

@@ -0,0 +1,110 @@
+/// Provider catalog — describes what a registered provider supports.
+///
+/// Wraps the FRB-generated [CccCapabilities] into a Dart-idiomatic type
+/// for querying algorithm availability and quality scores.
+library;
+
+import 'package:ccc_cryptography/src/rust/api/dto.dart';
+
+/// Describes the full set of capabilities for a registered provider.
+class CccProviderCatalog {
+  /// Provider name (e.g. "wolfssl").
+  final String providerName;
+
+  /// AEAD algorithms supported by this provider.
+  final List<CccAlgorithmInfo> aead;
+
+  /// KDF algorithms supported by this provider.
+  final List<CccAlgorithmInfo> kdf;
+
+  /// MAC algorithms supported by this provider.
+  final List<CccAlgorithmInfo> mac;
+
+  /// Hash algorithms supported by this provider.
+  final List<CccAlgorithmInfo> hash;
+
+  /// KEM algorithms supported by this provider.
+  final List<CccAlgorithmInfo> kem;
+
+  const CccProviderCatalog._({
+    required this.providerName,
+    required this.aead,
+    required this.kdf,
+    required this.mac,
+    required this.hash,
+    required this.kem,
+  });
+
+  /// Convert from the FRB-generated capabilities DTO.
+  factory CccProviderCatalog.fromCapabilities(CccCapabilities caps) {
+    return CccProviderCatalog._(
+      providerName: caps.providerName,
+      aead: caps.aead.map(CccAlgorithmInfo._fromEntry).toList(growable: false),
+      kdf: caps.kdf.map(CccAlgorithmInfo._fromEntry).toList(growable: false),
+      mac: caps.mac.map(CccAlgorithmInfo._fromEntry).toList(growable: false),
+      hash: caps.hash.map(CccAlgorithmInfo._fromEntry).toList(growable: false),
+      kem: caps.kem.map(CccAlgorithmInfo._fromEntry).toList(growable: false),
+    );
+  }
+
+  /// All available AEAD algorithms.
+  List<CccAlgorithmInfo> get availableAead =>
+      aead.where((a) => a.available).toList(growable: false);
+
+  /// All available KDF algorithms.
+  List<CccAlgorithmInfo> get availableKdf =>
+      kdf.where((a) => a.available).toList(growable: false);
+
+  /// All available MAC algorithms.
+  List<CccAlgorithmInfo> get availableMac =>
+      mac.where((a) => a.available).toList(growable: false);
+
+  /// All available Hash algorithms.
+  List<CccAlgorithmInfo> get availableHash =>
+      hash.where((a) => a.available).toList(growable: false);
+
+  /// All available KEM algorithms.
+  List<CccAlgorithmInfo> get availableKem =>
+      kem.where((a) => a.available).toList(growable: false);
+}
+
+/// Describes a single algorithm's availability and quality metrics.
+class CccAlgorithmInfo {
+  /// Numeric algorithm identifier (matches Rust `#[repr(u32)]`).
+  final int id;
+
+  /// Human-readable algorithm name (e.g. "AES-256-GCM").
+  final String name;
+
+  /// Whether this algorithm is available in the provider.
+  final bool available;
+
+  /// Whether the algorithm produces deterministic output for the same input.
+  final bool deterministicIo;
+
+  /// Provider-reported efficiency score (0–100).
+  final int efficiencyScore;
+
+  /// Provider-reported reliability score (0–100).
+  final int reliabilityScore;
+
+  const CccAlgorithmInfo({
+    required this.id,
+    required this.name,
+    required this.available,
+    required this.deterministicIo,
+    required this.efficiencyScore,
+    required this.reliabilityScore,
+  });
+
+  factory CccAlgorithmInfo._fromEntry(CccAlgorithmEntry e) {
+    return CccAlgorithmInfo(
+      id: e.algoId,
+      name: e.algoName,
+      available: e.capability.available,
+      deterministicIo: e.capability.deterministicIo,
+      efficiencyScore: e.capability.efficiencyScore,
+      reliabilityScore: e.capability.reliabilityScore,
+    );
+  }
+}

lib/ccc_self_test.dart

@@ -0,0 +1,68 @@
+/// Self-test result — wraps the FRB-generated report into Dart-idiomatic types.
+library;
+
+import 'package:ccc_cryptography/src/rust/api/dto.dart';
+
+/// Result of a single algorithm's self-test.
+class CccAlgorithmTestResult {
+  /// Numeric algorithm identifier.
+  final int algoId;
+
+  /// Human-readable algorithm name.
+  final String algoName;
+
+  /// Whether the algorithm passed its self-test.
+  final bool passed;
+
+  /// Diagnostic message if the test failed; `null` on success.
+  final String? errorMessage;
+
+  const CccAlgorithmTestResult({
+    required this.algoId,
+    required this.algoName,
+    required this.passed,
+    this.errorMessage,
+  });
+
+  factory CccAlgorithmTestResult._fromDto(CccAlgoTestResult dto) {
+    return CccAlgorithmTestResult(
+      algoId: dto.algoId,
+      algoName: dto.algoName,
+      passed: dto.passed,
+      errorMessage: dto.errorMessage,
+    );
+  }
+}
+
+/// Aggregate result of the provider self-test.
+class CccSelfTestResult {
+  /// Name of the provider that was tested.
+  final String providerName;
+
+  /// Per-algorithm test results.
+  final List<CccAlgorithmTestResult> results;
+
+  /// Whether all algorithms passed.
+  final bool allPassed;
+
+  const CccSelfTestResult._({
+    required this.providerName,
+    required this.results,
+    required this.allPassed,
+  });
+
+  /// Convert from the FRB-generated self-test report DTO.
+  factory CccSelfTestResult.fromReport(CccSelfTestReport report) {
+    return CccSelfTestResult._(
+      providerName: report.providerName,
+      results: report.results
+          .map(CccAlgorithmTestResult._fromDto)
+          .toList(growable: false),
+      allPassed: report.allPassed,
+    );
+  }
+
+  /// Algorithms that failed their self-test.
+  List<CccAlgorithmTestResult> get failures =>
+      results.where((r) => !r.passed).toList(growable: false);
+}

lib/src/rust/api/crypto.dart

@@ -0,0 +1,137 @@
+// This file is automatically generated, so please do not edit it.
+// @generated by `flutter_rust_bridge`@ 2.11.1.
+
+// ignore_for_file: invalid_use_of_internal_member, unused_import, unnecessary_import
+
+import '../frb_generated.dart';
+import 'dto.dart';
+import 'package:flutter_rust_bridge/flutter_rust_bridge_for_generated.dart';
+
+// These functions are ignored because they are not marked as `pub`: `default_provider`, `kem_provider`
+
+/// Initialise the CCC cryptographic subsystem.
+///
+/// Registers the wolfSSL provider in the global registry.
+/// Safe to call multiple times (idempotent).
+Future<void> cccInit() => RustLib.instance.api.crateApiCryptoCccInit();
+
+/// List all registered provider names.
+List<String> cccListProviders() =>
+    RustLib.instance.api.crateApiCryptoCccListProviders();
+
+/// Return the capabilities of the default provider.
+Future<CccCapabilities> cccCapabilities() =>
+    RustLib.instance.api.crateApiCryptoCccCapabilities();
+
+/// Encrypt with an AEAD algorithm.
+///
+/// Returns ciphertext‖tag.
+Future<Uint8List> cccAeadEncrypt({
+  required CccAeadAlgorithm algorithm,
+  required List<int> key,
+  required List<int> nonce,
+  required List<int> plaintext,
+  required List<int> aad,
+}) => RustLib.instance.api.crateApiCryptoCccAeadEncrypt(
+  algorithm: algorithm,
+  key: key,
+  nonce: nonce,
+  plaintext: plaintext,
+  aad: aad,
+);
+
+/// Decrypt with an AEAD algorithm.
+///
+/// Expects ciphertext‖tag as `ciphertext`.
+Future<Uint8List> cccAeadDecrypt({
+  required CccAeadAlgorithm algorithm,
+  required List<int> key,
+  required List<int> nonce,
+  required List<int> ciphertext,
+  required List<int> aad,
+}) => RustLib.instance.api.crateApiCryptoCccAeadDecrypt(
+  algorithm: algorithm,
+  key: key,
+  nonce: nonce,
+  ciphertext: ciphertext,
+  aad: aad,
+);
+
+/// Derive key material using a KDF.
+Future<Uint8List> cccKdfDerive({
+  required CccKdfAlgorithm algorithm,
+  required List<int> ikm,
+  required List<int> salt,
+  required List<int> info,
+  required int length,
+}) => RustLib.instance.api.crateApiCryptoCccKdfDerive(
+  algorithm: algorithm,
+  ikm: ikm,
+  salt: salt,
+  info: info,
+  length: length,
+);
+
+/// Compute a MAC tag.
+Future<Uint8List> cccMacCompute({
+  required CccMacAlgorithm algorithm,
+  required List<int> key,
+  required List<int> data,
+}) => RustLib.instance.api.crateApiCryptoCccMacCompute(
+  algorithm: algorithm,
+  key: key,
+  data: data,
+);
+
+/// Verify a MAC tag. Returns `true` if valid.
+Future<bool> cccMacVerify({
+  required CccMacAlgorithm algorithm,
+  required List<int> key,
+  required List<int> data,
+  required List<int> mac,
+}) => RustLib.instance.api.crateApiCryptoCccMacVerify(
+  algorithm: algorithm,
+  key: key,
+  data: data,
+  mac: mac,
+);
+
+/// Compute a cryptographic hash.
+Future<Uint8List> cccHash({
+  required CccHashAlgorithm algorithm,
+  required List<int> data,
+}) => RustLib.instance.api.crateApiCryptoCccHash(
+  algorithm: algorithm,
+  data: data,
+);
+
+/// Generate a KEM key pair.
+Future<CccKemKeyPair> cccKemGenerateKeypair({
+  required CccKemAlgorithm algorithm,
+}) => RustLib.instance.api.crateApiCryptoCccKemGenerateKeypair(
+  algorithm: algorithm,
+);
+
+/// KEM encapsulation — produce ciphertext + shared secret from a public key.
+Future<CccKemEncapResult> cccKemEncapsulate({
+  required CccKemAlgorithm algorithm,
+  required List<int> publicKey,
+}) => RustLib.instance.api.crateApiCryptoCccKemEncapsulate(
+  algorithm: algorithm,
+  publicKey: publicKey,
+);
+
+/// KEM decapsulation — recover shared secret from ciphertext + private key.
+Future<Uint8List> cccKemDecapsulate({
+  required CccKemAlgorithm algorithm,
+  required List<int> privateKey,
+  required List<int> ciphertext,
+}) => RustLib.instance.api.crateApiCryptoCccKemDecapsulate(
+  algorithm: algorithm,
+  privateKey: privateKey,
+  ciphertext: ciphertext,
+);
+
+/// Run the provider self-test and return a structured report.
+Future<CccSelfTestReport> cccSelfTest() =>
+    RustLib.instance.api.crateApiCryptoCccSelfTest();

lib/src/rust/api/dto.dart

@@ -0,0 +1,260 @@
+// This file is automatically generated, so please do not edit it.
+// @generated by `flutter_rust_bridge`@ 2.11.1.
+
+// ignore_for_file: invalid_use_of_internal_member, unused_import, unnecessary_import
+
+import '../frb_generated.dart';
+import 'package:flutter_rust_bridge/flutter_rust_bridge_for_generated.dart';
+import 'package:freezed_annotation/freezed_annotation.dart' hide protected;
+part 'dto.freezed.dart';
+
+// These functions are ignored because they are not marked as `pub`: `to_core`, `to_core`, `to_core`, `to_core`, `to_core`
+// These function are ignored because they are on traits that is not defined in current crate (put an empty `#[frb]` on it to unignore): `fmt`, `fmt`, `from`, `from`, `from`, `from`, `from`, `from`, `from`
+
+/// AEAD algorithm identifiers — values match `ccc_rust` `#[repr(u32)]`.
+enum CccAeadAlgorithm {
+  aesGcm256,
+  chaCha20Poly1305,
+  xChaCha20Poly1305,
+  ascon128A,
+}
+
+/// Per-algorithm self-test result.
+class CccAlgoTestResult {
+  final int algoId;
+  final String algoName;
+  final bool passed;
+  final String? errorMessage;
+
+  const CccAlgoTestResult({
+    required this.algoId,
+    required this.algoName,
+    required this.passed,
+    this.errorMessage,
+  });
+
+  @override
+  int get hashCode =>
+      algoId.hashCode ^
+      algoName.hashCode ^
+      passed.hashCode ^
+      errorMessage.hashCode;
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is CccAlgoTestResult &&
+          runtimeType == other.runtimeType &&
+          algoId == other.algoId &&
+          algoName == other.algoName &&
+          passed == other.passed &&
+          errorMessage == other.errorMessage;
+}
+
+/// Per-algorithm availability and quality scores.
+class CccAlgorithmCapability {
+  final bool available;
+  final bool deterministicIo;
+  final int efficiencyScore;
+  final int reliabilityScore;
+
+  const CccAlgorithmCapability({
+    required this.available,
+    required this.deterministicIo,
+    required this.efficiencyScore,
+    required this.reliabilityScore,
+  });
+
+  @override
+  int get hashCode =>
+      available.hashCode ^
+      deterministicIo.hashCode ^
+      efficiencyScore.hashCode ^
+      reliabilityScore.hashCode;
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is CccAlgorithmCapability &&
+          runtimeType == other.runtimeType &&
+          available == other.available &&
+          deterministicIo == other.deterministicIo &&
+          efficiencyScore == other.efficiencyScore &&
+          reliabilityScore == other.reliabilityScore;
+}
+
+/// An algorithm entry in the capabilities list.
+class CccAlgorithmEntry {
+  final int algoId;
+  final String algoName;
+  final CccAlgorithmCapability capability;
+
+  const CccAlgorithmEntry({
+    required this.algoId,
+    required this.algoName,
+    required this.capability,
+  });
+
+  @override
+  int get hashCode => algoId.hashCode ^ algoName.hashCode ^ capability.hashCode;
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is CccAlgorithmEntry &&
+          runtimeType == other.runtimeType &&
+          algoId == other.algoId &&
+          algoName == other.algoName &&
+          capability == other.capability;
+}
+
+/// Provider capabilities — flattened from HashMap to Vec for FRB.
+class CccCapabilities {
+  final String providerName;
+  final List<CccAlgorithmEntry> aead;
+  final List<CccAlgorithmEntry> kdf;
+  final List<CccAlgorithmEntry> mac;
+  final List<CccAlgorithmEntry> hash;
+  final List<CccAlgorithmEntry> kem;
+
+  const CccCapabilities({
+    required this.providerName,
+    required this.aead,
+    required this.kdf,
+    required this.mac,
+    required this.hash,
+    required this.kem,
+  });
+
+  @override
+  int get hashCode =>
+      providerName.hashCode ^
+      aead.hashCode ^
+      kdf.hashCode ^
+      mac.hashCode ^
+      hash.hashCode ^
+      kem.hashCode;
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is CccCapabilities &&
+          runtimeType == other.runtimeType &&
+          providerName == other.providerName &&
+          aead == other.aead &&
+          kdf == other.kdf &&
+          mac == other.mac &&
+          hash == other.hash &&
+          kem == other.kem;
+}
+
+@freezed
+sealed class CccCryptoError with _$CccCryptoError implements FrbException {
+  const CccCryptoError._();
+
+  const factory CccCryptoError.unsupportedAlgorithm(String field0) =
+      CccCryptoError_UnsupportedAlgorithm;
+  const factory CccCryptoError.invalidKey(String field0) =
+      CccCryptoError_InvalidKey;
+  const factory CccCryptoError.invalidNonce(String field0) =
+      CccCryptoError_InvalidNonce;
+  const factory CccCryptoError.authenticationFailed() =
+      CccCryptoError_AuthenticationFailed;
+  const factory CccCryptoError.invalidInput(String field0) =
+      CccCryptoError_InvalidInput;
+  const factory CccCryptoError.featureNotCompiled(String field0) =
+      CccCryptoError_FeatureNotCompiled;
+  const factory CccCryptoError.internalError(String field0) =
+      CccCryptoError_InternalError;
+}
+
+/// Hash algorithm identifiers.
+enum CccHashAlgorithm { sha256, sha384, sha512, blake2B512, sha3256, sha3512 }
+
+/// KDF algorithm identifiers.
+enum CccKdfAlgorithm { sha256, sha384, sha512, blake2B512, argon2Id, kmac256 }
+
+/// KEM algorithm identifiers.
+enum CccKemAlgorithm {
+  x25519,
+  x448,
+  mlKem768,
+  mlKem1024,
+  classicMcEliece460896,
+}
+
+/// KEM encapsulation result — ciphertext + shared secret.
+class CccKemEncapResult {
+  final Uint8List ciphertext;
+  final Uint8List sharedSecret;
+
+  const CccKemEncapResult({
+    required this.ciphertext,
+    required this.sharedSecret,
+  });
+
+  @override
+  int get hashCode => ciphertext.hashCode ^ sharedSecret.hashCode;
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is CccKemEncapResult &&
+          runtimeType == other.runtimeType &&
+          ciphertext == other.ciphertext &&
+          sharedSecret == other.sharedSecret;
+}
+
+/// KEM key pair — public + private key bytes.
+class CccKemKeyPair {
+  final Uint8List publicKey;
+  final Uint8List privateKey;
+
+  const CccKemKeyPair({required this.publicKey, required this.privateKey});
+
+  @override
+  int get hashCode => publicKey.hashCode ^ privateKey.hashCode;
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is CccKemKeyPair &&
+          runtimeType == other.runtimeType &&
+          publicKey == other.publicKey &&
+          privateKey == other.privateKey;
+}
+
+/// MAC algorithm identifiers.
+enum CccMacAlgorithm {
+  hmacSha256,
+  hmacSha384,
+  hmacSha512,
+  blake2BMac,
+  poly1305,
+}
+
+/// Aggregate self-test report.
+class CccSelfTestReport {
+  final String providerName;
+  final List<CccAlgoTestResult> results;
+  final bool allPassed;
+
+  const CccSelfTestReport({
+    required this.providerName,
+    required this.results,
+    required this.allPassed,
+  });
+
+  @override
+  int get hashCode =>
+      providerName.hashCode ^ results.hashCode ^ allPassed.hashCode;
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is CccSelfTestReport &&
+          runtimeType == other.runtimeType &&
+          providerName == other.providerName &&
+          results == other.results &&
+          allPassed == other.allPassed;
+}

lib/src/rust/api/simple.dart

@@ -0,0 +1,10 @@
+// This file is automatically generated, so please do not edit it.
+// @generated by `flutter_rust_bridge`@ 2.11.1.
+
+// ignore_for_file: invalid_use_of_internal_member, unused_import, unnecessary_import
+
+import '../frb_generated.dart';
+import 'package:flutter_rust_bridge/flutter_rust_bridge_for_generated.dart';
+
+String greet({required String name}) =>
+    RustLib.instance.api.crateApiSimpleGreet(name: name);

lib/src/rust/frb_generated.io.dart

@@ -0,0 +1,324 @@
+// This file is automatically generated, so please do not edit it.
+// @generated by `flutter_rust_bridge`@ 2.11.1.
+
+// ignore_for_file: unused_import, unused_element, unnecessary_import, duplicate_ignore, invalid_use_of_internal_member, annotate_overrides, non_constant_identifier_names, curly_braces_in_flow_control_structures, prefer_const_literals_to_create_immutables, unused_field
+
+import 'api/crypto.dart';
+import 'api/dto.dart';
+import 'api/simple.dart';
+import 'dart:async';
+import 'dart:convert';
+import 'dart:ffi' as ffi;
+import 'frb_generated.dart';
+import 'package:flutter_rust_bridge/flutter_rust_bridge_for_generated_io.dart';
+
+abstract class RustLibApiImplPlatform extends BaseApiImpl<RustLibWire> {
+  RustLibApiImplPlatform({
+    required super.handler,
+    required super.wire,
+    required super.generalizedFrbRustBinding,
+    required super.portManager,
+  });
+
+  @protected
+  String dco_decode_String(dynamic raw);
+
+  @protected
+  bool dco_decode_bool(dynamic raw);
+
+  @protected
+  CccAeadAlgorithm dco_decode_ccc_aead_algorithm(dynamic raw);
+
+  @protected
+  CccAlgoTestResult dco_decode_ccc_algo_test_result(dynamic raw);
+
+  @protected
+  CccAlgorithmCapability dco_decode_ccc_algorithm_capability(dynamic raw);
+
+  @protected
+  CccAlgorithmEntry dco_decode_ccc_algorithm_entry(dynamic raw);
+
+  @protected
+  CccCapabilities dco_decode_ccc_capabilities(dynamic raw);
+
+  @protected
+  CccCryptoError dco_decode_ccc_crypto_error(dynamic raw);
+
+  @protected
+  CccHashAlgorithm dco_decode_ccc_hash_algorithm(dynamic raw);
+
+  @protected
+  CccKdfAlgorithm dco_decode_ccc_kdf_algorithm(dynamic raw);
+
+  @protected
+  CccKemAlgorithm dco_decode_ccc_kem_algorithm(dynamic raw);
+
+  @protected
+  CccKemEncapResult dco_decode_ccc_kem_encap_result(dynamic raw);
+
+  @protected
+  CccKemKeyPair dco_decode_ccc_kem_key_pair(dynamic raw);
+
+  @protected
+  CccMacAlgorithm dco_decode_ccc_mac_algorithm(dynamic raw);
+
+  @protected
+  CccSelfTestReport dco_decode_ccc_self_test_report(dynamic raw);
+
+  @protected
+  int dco_decode_i_32(dynamic raw);
+
+  @protected
+  List<String> dco_decode_list_String(dynamic raw);
+
+  @protected
+  List<CccAlgoTestResult> dco_decode_list_ccc_algo_test_result(dynamic raw);
+
+  @protected
+  List<CccAlgorithmEntry> dco_decode_list_ccc_algorithm_entry(dynamic raw);
+
+  @protected
+  List<int> dco_decode_list_prim_u_8_loose(dynamic raw);
+
+  @protected
+  Uint8List dco_decode_list_prim_u_8_strict(dynamic raw);
+
+  @protected
+  String? dco_decode_opt_String(dynamic raw);
+
+  @protected
+  int dco_decode_u_32(dynamic raw);
+
+  @protected
+  int dco_decode_u_8(dynamic raw);
+
+  @protected
+  void dco_decode_unit(dynamic raw);
+
+  @protected
+  String sse_decode_String(SseDeserializer deserializer);
+
+  @protected
+  bool sse_decode_bool(SseDeserializer deserializer);
+
+  @protected
+  CccAeadAlgorithm sse_decode_ccc_aead_algorithm(SseDeserializer deserializer);
+
+  @protected
+  CccAlgoTestResult sse_decode_ccc_algo_test_result(
+    SseDeserializer deserializer,
+  );
+
+  @protected
+  CccAlgorithmCapability sse_decode_ccc_algorithm_capability(
+    SseDeserializer deserializer,
+  );
+
+  @protected
+  CccAlgorithmEntry sse_decode_ccc_algorithm_entry(
+    SseDeserializer deserializer,
+  );
+
+  @protected
+  CccCapabilities sse_decode_ccc_capabilities(SseDeserializer deserializer);
+
+  @protected
+  CccCryptoError sse_decode_ccc_crypto_error(SseDeserializer deserializer);
+
+  @protected
+  CccHashAlgorithm sse_decode_ccc_hash_algorithm(SseDeserializer deserializer);
+
+  @protected
+  CccKdfAlgorithm sse_decode_ccc_kdf_algorithm(SseDeserializer deserializer);
+
+  @protected
+  CccKemAlgorithm sse_decode_ccc_kem_algorithm(SseDeserializer deserializer);
+
+  @protected
+  CccKemEncapResult sse_decode_ccc_kem_encap_result(
+    SseDeserializer deserializer,
+  );
+
+  @protected
+  CccKemKeyPair sse_decode_ccc_kem_key_pair(SseDeserializer deserializer);
+
+  @protected
+  CccMacAlgorithm sse_decode_ccc_mac_algorithm(SseDeserializer deserializer);
+
+  @protected
+  CccSelfTestReport sse_decode_ccc_self_test_report(
+    SseDeserializer deserializer,
+  );
+
+  @protected
+  int sse_decode_i_32(SseDeserializer deserializer);
+
+  @protected
+  List<String> sse_decode_list_String(SseDeserializer deserializer);
+
+  @protected
+  List<CccAlgoTestResult> sse_decode_list_ccc_algo_test_result(
+    SseDeserializer deserializer,
+  );
+
+  @protected
+  List<CccAlgorithmEntry> sse_decode_list_ccc_algorithm_entry(
+    SseDeserializer deserializer,
+  );
+
+  @protected
+  List<int> sse_decode_list_prim_u_8_loose(SseDeserializer deserializer);
+
+  @protected
+  Uint8List sse_decode_list_prim_u_8_strict(SseDeserializer deserializer);
+
+  @protected
+  String? sse_decode_opt_String(SseDeserializer deserializer);
+
+  @protected
+  int sse_decode_u_32(SseDeserializer deserializer);
+
+  @protected
+  int sse_decode_u_8(SseDeserializer deserializer);
+
+  @protected
+  void sse_decode_unit(SseDeserializer deserializer);
+
+  @protected
+  void sse_encode_String(String self, SseSerializer serializer);
+
+  @protected
+  void sse_encode_bool(bool self, SseSerializer serializer);
+
+  @protected
+  void sse_encode_ccc_aead_algorithm(
+    CccAeadAlgorithm self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_algo_test_result(
+    CccAlgoTestResult self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_algorithm_capability(
+    CccAlgorithmCapability self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_algorithm_entry(
+    CccAlgorithmEntry self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_capabilities(
+    CccCapabilities self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_crypto_error(
+    CccCryptoError self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_hash_algorithm(
+    CccHashAlgorithm self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_kdf_algorithm(
+    CccKdfAlgorithm self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_kem_algorithm(
+    CccKemAlgorithm self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_kem_encap_result(
+    CccKemEncapResult self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_kem_key_pair(
+    CccKemKeyPair self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_mac_algorithm(
+    CccMacAlgorithm self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_self_test_report(
+    CccSelfTestReport self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_i_32(int self, SseSerializer serializer);
+
+  @protected
+  void sse_encode_list_String(List<String> self, SseSerializer serializer);
+
+  @protected
+  void sse_encode_list_ccc_algo_test_result(
+    List<CccAlgoTestResult> self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_list_ccc_algorithm_entry(
+    List<CccAlgorithmEntry> self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_list_prim_u_8_loose(List<int> self, SseSerializer serializer);
+
+  @protected
+  void sse_encode_list_prim_u_8_strict(
+    Uint8List self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_opt_String(String? self, SseSerializer serializer);
+
+  @protected
+  void sse_encode_u_32(int self, SseSerializer serializer);
+
+  @protected
+  void sse_encode_u_8(int self, SseSerializer serializer);
+
+  @protected
+  void sse_encode_unit(void self, SseSerializer serializer);
+}
+
+// Section: wire_class
+
+class RustLibWire implements BaseWire {
+  factory RustLibWire.fromExternalLibrary(ExternalLibrary lib) =>
+      RustLibWire(lib.ffiDynamicLibrary);
+
+  /// Holds the symbol lookup function.
+  final ffi.Pointer<T> Function<T extends ffi.NativeType>(String symbolName)
+  _lookup;
+
+  /// The symbols are looked up in [dynamicLibrary].
+  RustLibWire(ffi.DynamicLibrary dynamicLibrary)
+    : _lookup = dynamicLibrary.lookup;
+}

lib/src/rust/frb_generated.web.dart

@@ -0,0 +1,324 @@
+// This file is automatically generated, so please do not edit it.
+// @generated by `flutter_rust_bridge`@ 2.11.1.
+
+// ignore_for_file: unused_import, unused_element, unnecessary_import, duplicate_ignore, invalid_use_of_internal_member, annotate_overrides, non_constant_identifier_names, curly_braces_in_flow_control_structures, prefer_const_literals_to_create_immutables, unused_field
+
+// Static analysis wrongly picks the IO variant, thus ignore this
+// ignore_for_file: argument_type_not_assignable
+
+import 'api/crypto.dart';
+import 'api/dto.dart';
+import 'api/simple.dart';
+import 'dart:async';
+import 'dart:convert';
+import 'frb_generated.dart';
+import 'package:flutter_rust_bridge/flutter_rust_bridge_for_generated_web.dart';
+
+abstract class RustLibApiImplPlatform extends BaseApiImpl<RustLibWire> {
+  RustLibApiImplPlatform({
+    required super.handler,
+    required super.wire,
+    required super.generalizedFrbRustBinding,
+    required super.portManager,
+  });
+
+  @protected
+  String dco_decode_String(dynamic raw);
+
+  @protected
+  bool dco_decode_bool(dynamic raw);
+
+  @protected
+  CccAeadAlgorithm dco_decode_ccc_aead_algorithm(dynamic raw);
+
+  @protected
+  CccAlgoTestResult dco_decode_ccc_algo_test_result(dynamic raw);
+
+  @protected
+  CccAlgorithmCapability dco_decode_ccc_algorithm_capability(dynamic raw);
+
+  @protected
+  CccAlgorithmEntry dco_decode_ccc_algorithm_entry(dynamic raw);
+
+  @protected
+  CccCapabilities dco_decode_ccc_capabilities(dynamic raw);
+
+  @protected
+  CccCryptoError dco_decode_ccc_crypto_error(dynamic raw);
+
+  @protected
+  CccHashAlgorithm dco_decode_ccc_hash_algorithm(dynamic raw);
+
+  @protected
+  CccKdfAlgorithm dco_decode_ccc_kdf_algorithm(dynamic raw);
+
+  @protected
+  CccKemAlgorithm dco_decode_ccc_kem_algorithm(dynamic raw);
+
+  @protected
+  CccKemEncapResult dco_decode_ccc_kem_encap_result(dynamic raw);
+
+  @protected
+  CccKemKeyPair dco_decode_ccc_kem_key_pair(dynamic raw);
+
+  @protected
+  CccMacAlgorithm dco_decode_ccc_mac_algorithm(dynamic raw);
+
+  @protected
+  CccSelfTestReport dco_decode_ccc_self_test_report(dynamic raw);
+
+  @protected
+  int dco_decode_i_32(dynamic raw);
+
+  @protected
+  List<String> dco_decode_list_String(dynamic raw);
+
+  @protected
+  List<CccAlgoTestResult> dco_decode_list_ccc_algo_test_result(dynamic raw);
+
+  @protected
+  List<CccAlgorithmEntry> dco_decode_list_ccc_algorithm_entry(dynamic raw);
+
+  @protected
+  List<int> dco_decode_list_prim_u_8_loose(dynamic raw);
+
+  @protected
+  Uint8List dco_decode_list_prim_u_8_strict(dynamic raw);
+
+  @protected
+  String? dco_decode_opt_String(dynamic raw);
+
+  @protected
+  int dco_decode_u_32(dynamic raw);
+
+  @protected
+  int dco_decode_u_8(dynamic raw);
+
+  @protected
+  void dco_decode_unit(dynamic raw);
+
+  @protected
+  String sse_decode_String(SseDeserializer deserializer);
+
+  @protected
+  bool sse_decode_bool(SseDeserializer deserializer);
+
+  @protected
+  CccAeadAlgorithm sse_decode_ccc_aead_algorithm(SseDeserializer deserializer);
+
+  @protected
+  CccAlgoTestResult sse_decode_ccc_algo_test_result(
+    SseDeserializer deserializer,
+  );
+
+  @protected
+  CccAlgorithmCapability sse_decode_ccc_algorithm_capability(
+    SseDeserializer deserializer,
+  );
+
+  @protected
+  CccAlgorithmEntry sse_decode_ccc_algorithm_entry(
+    SseDeserializer deserializer,
+  );
+
+  @protected
+  CccCapabilities sse_decode_ccc_capabilities(SseDeserializer deserializer);
+
+  @protected
+  CccCryptoError sse_decode_ccc_crypto_error(SseDeserializer deserializer);
+
+  @protected
+  CccHashAlgorithm sse_decode_ccc_hash_algorithm(SseDeserializer deserializer);
+
+  @protected
+  CccKdfAlgorithm sse_decode_ccc_kdf_algorithm(SseDeserializer deserializer);
+
+  @protected
+  CccKemAlgorithm sse_decode_ccc_kem_algorithm(SseDeserializer deserializer);
+
+  @protected
+  CccKemEncapResult sse_decode_ccc_kem_encap_result(
+    SseDeserializer deserializer,
+  );
+
+  @protected
+  CccKemKeyPair sse_decode_ccc_kem_key_pair(SseDeserializer deserializer);
+
+  @protected
+  CccMacAlgorithm sse_decode_ccc_mac_algorithm(SseDeserializer deserializer);
+
+  @protected
+  CccSelfTestReport sse_decode_ccc_self_test_report(
+    SseDeserializer deserializer,
+  );
+
+  @protected
+  int sse_decode_i_32(SseDeserializer deserializer);
+
+  @protected
+  List<String> sse_decode_list_String(SseDeserializer deserializer);
+
+  @protected
+  List<CccAlgoTestResult> sse_decode_list_ccc_algo_test_result(
+    SseDeserializer deserializer,
+  );
+
+  @protected
+  List<CccAlgorithmEntry> sse_decode_list_ccc_algorithm_entry(
+    SseDeserializer deserializer,
+  );
+
+  @protected
+  List<int> sse_decode_list_prim_u_8_loose(SseDeserializer deserializer);
+
+  @protected
+  Uint8List sse_decode_list_prim_u_8_strict(SseDeserializer deserializer);
+
+  @protected
+  String? sse_decode_opt_String(SseDeserializer deserializer);
+
+  @protected
+  int sse_decode_u_32(SseDeserializer deserializer);
+
+  @protected
+  int sse_decode_u_8(SseDeserializer deserializer);
+
+  @protected
+  void sse_decode_unit(SseDeserializer deserializer);
+
+  @protected
+  void sse_encode_String(String self, SseSerializer serializer);
+
+  @protected
+  void sse_encode_bool(bool self, SseSerializer serializer);
+
+  @protected
+  void sse_encode_ccc_aead_algorithm(
+    CccAeadAlgorithm self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_algo_test_result(
+    CccAlgoTestResult self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_algorithm_capability(
+    CccAlgorithmCapability self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_algorithm_entry(
+    CccAlgorithmEntry self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_capabilities(
+    CccCapabilities self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_crypto_error(
+    CccCryptoError self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_hash_algorithm(
+    CccHashAlgorithm self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_kdf_algorithm(
+    CccKdfAlgorithm self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_kem_algorithm(
+    CccKemAlgorithm self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_kem_encap_result(
+    CccKemEncapResult self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_kem_key_pair(
+    CccKemKeyPair self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_mac_algorithm(
+    CccMacAlgorithm self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_ccc_self_test_report(
+    CccSelfTestReport self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_i_32(int self, SseSerializer serializer);
+
+  @protected
+  void sse_encode_list_String(List<String> self, SseSerializer serializer);
+
+  @protected
+  void sse_encode_list_ccc_algo_test_result(
+    List<CccAlgoTestResult> self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_list_ccc_algorithm_entry(
+    List<CccAlgorithmEntry> self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_list_prim_u_8_loose(List<int> self, SseSerializer serializer);
+
+  @protected
+  void sse_encode_list_prim_u_8_strict(
+    Uint8List self,
+    SseSerializer serializer,
+  );
+
+  @protected
+  void sse_encode_opt_String(String? self, SseSerializer serializer);
+
+  @protected
+  void sse_encode_u_32(int self, SseSerializer serializer);
+
+  @protected
+  void sse_encode_u_8(int self, SseSerializer serializer);
+
+  @protected
+  void sse_encode_unit(void self, SseSerializer serializer);
+}
+
+// Section: wire_class
+
+class RustLibWire implements BaseWire {
+  RustLibWire.fromExternalLibrary(ExternalLibrary lib);
+}
+
+@JS('wasm_bindgen')
+external RustLibWasmModule get wasmModule;
+
+@JS()
+@anonymous
+extension type RustLibWasmModule._(JSObject _) implements JSObject {}

linux/CMakeLists.txt

@@ -7,16 +7,13 @@ cmake_minimum_required(VERSION 3.10)
 set(PROJECT_NAME "ccc_cryptography")
 project(${PROJECT_NAME} LANGUAGES CXX)
 
-# Invoke the build for native code shared with the other target platforms.
+include("../cargokit/cmake/cargokit.cmake")
-# This can be changed to accommodate different builds.
+apply_cargokit(${PROJECT_NAME} ../rust ccc_cryptography "")
-add_subdirectory("${CMAKE_CURRENT_SOURCE_DIR}/../src" "${CMAKE_CURRENT_BINARY_DIR}/shared")
 
 # List of absolute paths to libraries that should be bundled with the plugin.
 # This list could contain prebuilt libraries, or libraries created by an
 # external build triggered from this build file.
 set(ccc_cryptography_bundled_libraries
-  # Defined in ../src/CMakeLists.txt.
+  "${${PROJECT_NAME}_cargokit_lib}"
-  # This can be changed to accommodate different builds.
-  $<TARGET_FILE:ccc_cryptography>
   PARENT_SCOPE
 )

macos/Classes/ccc_cryptography.c

@@ -1,3 +0,0 @@
-// Relative import to be able to reuse the C sources.
-// See the comment in ../ccc_cryptography.podspec for more information.
-#include "../../src/ccc_cryptography.c"

macos/Classes/dummy_file.c

@@ -0,0 +1 @@
+// This is an empty file to force CocoaPods to create a framework.

macos/ccc_cryptography.podspec

@@ -18,17 +18,27 @@ A new Flutter FFI plugin project.
   # paths, so Classes contains a forwarder C file that relatively imports
   # `../src/*` so that the C sources can be shared among all target platforms.
   s.source           = { :path => '.' }
-  s.source_files = 'Classes/**/*'
+  s.source_files     = 'Classes/**/*'
-
-  # If your plugin requires a privacy manifest, for example if it collects user
-  # data, update the PrivacyInfo.xcprivacy file to describe your plugin's
-  # privacy impact, and then uncomment this line. For more information,
-  # see https://developer.apple.com/documentation/bundleresources/privacy_manifest_files
-  # s.resource_bundles = {'ccc_cryptography_privacy' => ['Resources/PrivacyInfo.xcprivacy']}
-
   s.dependency 'FlutterMacOS'
 
   s.platform = :osx, '10.11'
   s.pod_target_xcconfig = { 'DEFINES_MODULE' => 'YES' }
   s.swift_version = '5.0'
-end
+
+  s.script_phase = {
+    :name => 'Build Rust library',
+    # First argument is relative path to the `rust` folder, second is name of rust library
+    :script => 'sh "$PODS_TARGET_SRCROOT/../cargokit/build_pod.sh" ../rust ccc_cryptography',
+    :execution_position => :before_compile,
+    :input_files => ['${BUILT_PRODUCTS_DIR}/cargokit_phony'],
+    # Let XCode know that the static library referenced in -force_load below is
+    # created by this build step.
+    :output_files => ["${BUILT_PRODUCTS_DIR}/libccc_cryptography.a"],
+  }
+  s.pod_target_xcconfig = {
+    'DEFINES_MODULE' => 'YES',
+    # Flutter.framework does not contain a i386 slice.
+    'EXCLUDED_ARCHS[sdk=iphonesimulator*]' => 'i386',
+    'OTHER_LDFLAGS' => '-force_load ${BUILT_PRODUCTS_DIR}/libccc_cryptography.a',
+  }
+end

pubspec.yaml

@@ -1,7 +1,7 @@
 name: ccc_cryptography
 description: "Copius Cipher Chain Cryptography"
+publish_to: 'none'
 version: 0.0.1
-homepage:
 
 environment:
   sdk: ^3.10.1
@@ -11,13 +11,19 @@ dependencies:
   flutter:
     sdk: flutter
   plugin_platform_interface: ^2.0.2
+  flutter_rust_bridge: 2.11.1
+  freezed_annotation: ^2.4.1
+  meta: ^1.11.0
 
 dev_dependencies:
   ffi: ^2.1.3
-  ffigen: ^13.0.0
   flutter_test:
     sdk: flutter
   flutter_lints: ^6.0.0
+  build_runner: ^2.4.8
+  freezed: ^2.5.2
+  integration_test:
+    sdk: flutter
 
 flutter:
   plugin:

rust/.gitignore

@@ -0,0 +1 @@
+/target

rust/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "ccc_cryptography"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+crate-type = ["cdylib", "staticlib"]
+
+[dependencies]
+# Local dev paths — switch to git deps for CI/release:
+# ccc-crypto-core = { git = "ssh://git@10.0.5.109/j3g/lum_ccc_rust.git", rev = "b1873b2" }
+# ccc-crypto-wolfssl = { git = "ssh://git@10.0.5.109/j3g/lum_ccc_rust.git", rev = "b1873b2" }
+ccc-crypto-core = { path = "/Volumes/LUM/source/letusmsg_proj/app/lum_ccc_rust/crates/ccc-crypto-core" }
+ccc-crypto-wolfssl = { path = "/Volumes/LUM/source/letusmsg_proj/app/lum_ccc_rust/crates/ccc-crypto-wolfssl" }
+flutter_rust_bridge = "=2.11.1"
+log = "0.4"

rust/src/api/crypto.rs

@@ -0,0 +1,208 @@
+// Bridge API — thin wrappers that delegate to ccc_rust providers.
+//
+// No cryptographic logic here; only type conversions and registry lookups.
+
+use ccc_crypto_core::{KemProvider, ProviderRegistry};
+use ccc_crypto_wolfssl::WolfSslProvider;
+
+use crate::api::dto::*;
+
+/// Trace-level bridge logging. Visible only when `RUST_LOG=trace` (or
+/// equivalent) is set; compiled out in release builds when the `log` crate's
+/// `release_max_level_off` feature is enabled.
+macro_rules! dbg_bridge {
+    ($($arg:tt)*) => {
+        log::trace!("[ccc-bridge] {}", format!($($arg)*));
+    };
+}
+
+// ── Helpers ──────────────────────────────────────────────────────────────────
+
+/// Default provider name used when the caller doesn't specify one.
+const DEFAULT_PROVIDER: &str = "wolfssl";
+
+/// Get the default provider from the registry or return an error.
+fn default_provider(
+) -> Result<std::sync::Arc<dyn ccc_crypto_core::provider::CryptoProvider>, CccCryptoError> {
+    ProviderRegistry::global()
+        .get(DEFAULT_PROVIDER)
+        .ok_or_else(|| {
+            CccCryptoError::InternalError(format!(
+                "provider '{DEFAULT_PROVIDER}' not registered — call ccc_init() first"
+            ))
+        })
+}
+
+/// A lazily-initialised KemProvider instance.
+///
+/// `KemProvider` is not part of the `CryptoProvider` supertrait, so we keep
+/// a standalone `WolfSslProvider` for KEM operations.
+fn kem_provider() -> &'static WolfSslProvider {
+    use std::sync::OnceLock;
+    static KEM: OnceLock<WolfSslProvider> = OnceLock::new();
+    KEM.get_or_init(WolfSslProvider::new)
+}
+
+// ── Init ─────────────────────────────────────────────────────────────────────
+
+/// Initialise the CCC cryptographic subsystem.
+///
+/// Registers the wolfSSL provider in the global registry.
+/// Safe to call multiple times (idempotent).
+pub fn ccc_init() {
+    dbg_bridge!("ccc_init: enter");
+    flutter_rust_bridge::setup_default_user_utils();
+    if !ProviderRegistry::global().contains(DEFAULT_PROVIDER) {
+        ccc_crypto_wolfssl::init();
+    }
+    dbg_bridge!("ccc_init: exit");
+}
+
+// ── Provider info ────────────────────────────────────────────────────────────
+
+/// List all registered provider names.
+#[flutter_rust_bridge::frb(sync)]
+pub fn ccc_list_providers() -> Vec<String> {
+    dbg_bridge!("ccc_list_providers");
+    ProviderRegistry::global().list()
+}
+
+/// Return the capabilities of the default provider.
+pub fn ccc_capabilities() -> Result<CccCapabilities, CccCryptoError> {
+    dbg_bridge!("ccc_capabilities");
+    let provider = default_provider()?;
+    Ok(CccCapabilities::from(provider.capabilities()))
+}
+
+// ── AEAD ─────────────────────────────────────────────────────────────────────
+
+/// Encrypt with an AEAD algorithm.
+///
+/// Returns ciphertext‖tag.
+pub fn ccc_aead_encrypt(
+    algorithm: CccAeadAlgorithm,
+    key: Vec<u8>,
+    nonce: Vec<u8>,
+    plaintext: Vec<u8>,
+    aad: Vec<u8>,
+) -> Result<Vec<u8>, CccCryptoError> {
+    dbg_bridge!("ccc_aead_encrypt: pt_len={}", plaintext.len());
+    let provider = default_provider()?;
+    Ok(provider.encrypt_aead(algorithm.to_core(), &key, &nonce, &plaintext, &aad)?)
+}
+
+/// Decrypt with an AEAD algorithm.
+///
+/// Expects ciphertext‖tag as `ciphertext`.
+pub fn ccc_aead_decrypt(
+    algorithm: CccAeadAlgorithm,
+    key: Vec<u8>,
+    nonce: Vec<u8>,
+    ciphertext: Vec<u8>,
+    aad: Vec<u8>,
+) -> Result<Vec<u8>, CccCryptoError> {
+    dbg_bridge!("ccc_aead_decrypt: ct_len={}", ciphertext.len());
+    let provider = default_provider()?;
+    Ok(provider.decrypt_aead(algorithm.to_core(), &key, &nonce, &ciphertext, &aad)?)
+}
+
+// ── KDF ──────────────────────────────────────────────────────────────────────
+
+/// Derive key material using a KDF.
+pub fn ccc_kdf_derive(
+    algorithm: CccKdfAlgorithm,
+    ikm: Vec<u8>,
+    salt: Vec<u8>,
+    info: Vec<u8>,
+    length: u32,
+) -> Result<Vec<u8>, CccCryptoError> {
+    dbg_bridge!("ccc_kdf_derive: length={}", length);
+    let provider = default_provider()?;
+    let derived = provider.derive_key(
+        algorithm.to_core(),
+        &ikm,
+        &salt,
+        &info,
+        length as usize,
+    )?;
+    // Move out of Zeroizing wrapper — FRB will copy to Dart.
+    Ok(derived.to_vec())
+}
+
+// ── MAC ──────────────────────────────────────────────────────────────────────
+
+/// Compute a MAC tag.
+pub fn ccc_mac_compute(
+    algorithm: CccMacAlgorithm,
+    key: Vec<u8>,
+    data: Vec<u8>,
+) -> Result<Vec<u8>, CccCryptoError> {
+    dbg_bridge!("ccc_mac_compute: data_len={}", data.len());
+    let provider = default_provider()?;
+    Ok(provider.compute_mac(algorithm.to_core(), &key, &data)?)
+}
+
+/// Verify a MAC tag. Returns `true` if valid.
+pub fn ccc_mac_verify(
+    algorithm: CccMacAlgorithm,
+    key: Vec<u8>,
+    data: Vec<u8>,
+    mac: Vec<u8>,
+) -> Result<bool, CccCryptoError> {
+    dbg_bridge!("ccc_mac_verify: data_len={}", data.len());
+    let provider = default_provider()?;
+    Ok(provider.verify_mac(algorithm.to_core(), &key, &data, &mac)?)
+}
+
+// ── Hash ─────────────────────────────────────────────────────────────────────
+
+/// Compute a cryptographic hash.
+pub fn ccc_hash(
+    algorithm: CccHashAlgorithm,
+    data: Vec<u8>,
+) -> Result<Vec<u8>, CccCryptoError> {
+    dbg_bridge!("ccc_hash: data_len={}", data.len());
+    let provider = default_provider()?;
+    Ok(provider.hash(algorithm.to_core(), &data)?)
+}
+
+// ── KEM ──────────────────────────────────────────────────────────────────────
+
+/// Generate a KEM key pair.
+pub fn ccc_kem_generate_keypair(
+    algorithm: CccKemAlgorithm,
+) -> Result<CccKemKeyPair, CccCryptoError> {
+    dbg_bridge!("ccc_kem_generate_keypair");
+    let kp = kem_provider().generate_keypair(algorithm.to_core())?;
+    Ok(CccKemKeyPair::from(kp))
+}
+
+/// KEM encapsulation — produce ciphertext + shared secret from a public key.
+pub fn ccc_kem_encapsulate(
+    algorithm: CccKemAlgorithm,
+    public_key: Vec<u8>,
+) -> Result<CccKemEncapResult, CccCryptoError> {
+    dbg_bridge!("ccc_kem_encapsulate");
+    let result = kem_provider().encapsulate(algorithm.to_core(), &public_key)?;
+    Ok(CccKemEncapResult::from(result))
+}
+
+/// KEM decapsulation — recover shared secret from ciphertext + private key.
+pub fn ccc_kem_decapsulate(
+    algorithm: CccKemAlgorithm,
+    private_key: Vec<u8>,
+    ciphertext: Vec<u8>,
+) -> Result<Vec<u8>, CccCryptoError> {
+    dbg_bridge!("ccc_kem_decapsulate");
+    let ss = kem_provider().decapsulate(algorithm.to_core(), &private_key, &ciphertext)?;
+    Ok(ss.to_vec())
+}
+
+// ── Self-test ────────────────────────────────────────────────────────────────
+
+/// Run the provider self-test and return a structured report.
+pub fn ccc_self_test() -> Result<CccSelfTestReport, CccCryptoError> {
+    dbg_bridge!("ccc_self_test");
+    let provider = default_provider()?;
+    Ok(CccSelfTestReport::from(provider.self_test()))
+}

rust/src/api/dto.rs

@@ -0,0 +1,328 @@
+// Bridge-visible DTOs — no crypto logic, only type conversions.
+//
+// flutter_rust_bridge codegen picks up all pub types under crate::api
+// and generates corresponding Dart classes.
+
+use ccc_crypto_core::{
+    AeadAlgorithm, AlgoTestResult, AlgorithmCapability, HashAlgorithm, KdfAlgorithm,
+    KemAlgorithm, KemEncapResult, KemKeyPair, MacAlgorithm, ProviderCapabilities, SelfTestReport,
+};
+
+// ── Algorithm ID enums (mirror Rust repr(u32) values) ────────────────────────
+
+/// AEAD algorithm identifiers — values match `ccc_rust` `#[repr(u32)]`.
+#[flutter_rust_bridge::frb(dart_metadata=("freezed"))]
+pub enum CccAeadAlgorithm {
+    AesGcm256 = 12,
+    ChaCha20Poly1305 = 13,
+    XChaCha20Poly1305 = 14,
+    Ascon128a = 15,
+}
+
+/// KDF algorithm identifiers.
+#[flutter_rust_bridge::frb(dart_metadata=("freezed"))]
+pub enum CccKdfAlgorithm {
+    Sha256 = 1,
+    Sha384 = 2,
+    Sha512 = 3,
+    Blake2b512 = 4,
+    Argon2id = 5,
+    Kmac256 = 6,
+}
+
+/// MAC algorithm identifiers.
+#[flutter_rust_bridge::frb(dart_metadata=("freezed"))]
+pub enum CccMacAlgorithm {
+    HmacSha256 = 30,
+    HmacSha384 = 31,
+    HmacSha512 = 32,
+    Blake2bMac = 33,
+    Poly1305 = 35,
+}
+
+/// Hash algorithm identifiers.
+#[flutter_rust_bridge::frb(dart_metadata=("freezed"))]
+pub enum CccHashAlgorithm {
+    Sha256 = 40,
+    Sha384 = 41,
+    Sha512 = 42,
+    Blake2b512 = 43,
+    Sha3_256 = 44,
+    Sha3_512 = 45,
+}
+
+/// KEM algorithm identifiers.
+#[flutter_rust_bridge::frb(dart_metadata=("freezed"))]
+pub enum CccKemAlgorithm {
+    X25519 = 50,
+    X448 = 51,
+    MlKem768 = 52,
+    MlKem1024 = 53,
+    ClassicMcEliece460896 = 54,
+}
+
+// ── Enum conversions ─────────────────────────────────────────────────────────
+
+impl CccAeadAlgorithm {
+    pub(crate) fn to_core(&self) -> AeadAlgorithm {
+        match self {
+            Self::AesGcm256 => AeadAlgorithm::AesGcm256,
+            Self::ChaCha20Poly1305 => AeadAlgorithm::ChaCha20Poly1305,
+            Self::XChaCha20Poly1305 => AeadAlgorithm::XChaCha20Poly1305,
+            Self::Ascon128a => AeadAlgorithm::Ascon128a,
+        }
+    }
+}
+
+impl CccKdfAlgorithm {
+    pub(crate) fn to_core(&self) -> KdfAlgorithm {
+        match self {
+            Self::Sha256 => KdfAlgorithm::Sha256,
+            Self::Sha384 => KdfAlgorithm::Sha384,
+            Self::Sha512 => KdfAlgorithm::Sha512,
+            Self::Blake2b512 => KdfAlgorithm::Blake2b512,
+            Self::Argon2id => KdfAlgorithm::Argon2id,
+            Self::Kmac256 => KdfAlgorithm::Kmac256,
+        }
+    }
+}
+
+impl CccMacAlgorithm {
+    pub(crate) fn to_core(&self) -> MacAlgorithm {
+        match self {
+            Self::HmacSha256 => MacAlgorithm::HmacSha256,
+            Self::HmacSha384 => MacAlgorithm::HmacSha384,
+            Self::HmacSha512 => MacAlgorithm::HmacSha512,
+            Self::Blake2bMac => MacAlgorithm::Blake2bMac,
+            Self::Poly1305 => MacAlgorithm::Poly1305,
+        }
+    }
+}
+
+impl CccHashAlgorithm {
+    pub(crate) fn to_core(&self) -> HashAlgorithm {
+        match self {
+            Self::Sha256 => HashAlgorithm::Sha256,
+            Self::Sha384 => HashAlgorithm::Sha384,
+            Self::Sha512 => HashAlgorithm::Sha512,
+            Self::Blake2b512 => HashAlgorithm::Blake2b512,
+            Self::Sha3_256 => HashAlgorithm::Sha3_256,
+            Self::Sha3_512 => HashAlgorithm::Sha3_512,
+        }
+    }
+}
+
+impl CccKemAlgorithm {
+    pub(crate) fn to_core(&self) -> KemAlgorithm {
+        match self {
+            Self::X25519 => KemAlgorithm::X25519,
+            Self::X448 => KemAlgorithm::X448,
+            Self::MlKem768 => KemAlgorithm::MlKem768,
+            Self::MlKem1024 => KemAlgorithm::MlKem1024,
+            Self::ClassicMcEliece460896 => KemAlgorithm::ClassicMcEliece460896,
+        }
+    }
+}
+
+// ── DTO structs ──────────────────────────────────────────────────────────────
+
+/// Per-algorithm availability and quality scores.
+pub struct CccAlgorithmCapability {
+    pub available: bool,
+    pub deterministic_io: bool,
+    pub efficiency_score: u8,
+    pub reliability_score: u8,
+}
+
+impl From<&AlgorithmCapability> for CccAlgorithmCapability {
+    fn from(cap: &AlgorithmCapability) -> Self {
+        Self {
+            available: cap.available,
+            deterministic_io: cap.deterministic_io,
+            efficiency_score: cap.efficiency_score,
+            reliability_score: cap.reliability_score,
+        }
+    }
+}
+
+/// An algorithm entry in the capabilities list.
+pub struct CccAlgorithmEntry {
+    pub algo_id: u32,
+    pub algo_name: String,
+    pub capability: CccAlgorithmCapability,
+}
+
+/// Provider capabilities — flattened from HashMap to Vec for FRB.
+pub struct CccCapabilities {
+    pub provider_name: String,
+    pub aead: Vec<CccAlgorithmEntry>,
+    pub kdf: Vec<CccAlgorithmEntry>,
+    pub mac: Vec<CccAlgorithmEntry>,
+    pub hash: Vec<CccAlgorithmEntry>,
+    pub kem: Vec<CccAlgorithmEntry>,
+}
+
+impl From<ProviderCapabilities> for CccCapabilities {
+    fn from(caps: ProviderCapabilities) -> Self {
+        Self {
+            provider_name: caps.provider_name,
+            aead: caps
+                .aead
+                .iter()
+                .map(|(algo, cap)| CccAlgorithmEntry {
+                    algo_id: *algo as u32,
+                    algo_name: algo.name().to_string(),
+                    capability: CccAlgorithmCapability::from(cap),
+                })
+                .collect(),
+            kdf: caps
+                .kdf
+                .iter()
+                .map(|(algo, cap)| CccAlgorithmEntry {
+                    algo_id: *algo as u32,
+                    algo_name: algo.name().to_string(),
+                    capability: CccAlgorithmCapability::from(cap),
+                })
+                .collect(),
+            mac: caps
+                .mac
+                .iter()
+                .map(|(algo, cap)| CccAlgorithmEntry {
+                    algo_id: *algo as u32,
+                    algo_name: algo.name().to_string(),
+                    capability: CccAlgorithmCapability::from(cap),
+                })
+                .collect(),
+            hash: caps
+                .hash
+                .iter()
+                .map(|(algo, cap)| CccAlgorithmEntry {
+                    algo_id: *algo as u32,
+                    algo_name: algo.name().to_string(),
+                    capability: CccAlgorithmCapability::from(cap),
+                })
+                .collect(),
+            kem: caps
+                .kem
+                .iter()
+                .map(|(algo, cap)| CccAlgorithmEntry {
+                    algo_id: *algo as u32,
+                    algo_name: algo.name().to_string(),
+                    capability: CccAlgorithmCapability::from(cap),
+                })
+                .collect(),
+        }
+    }
+}
+
+/// KEM key pair — public + private key bytes.
+pub struct CccKemKeyPair {
+    pub public_key: Vec<u8>,
+    pub private_key: Vec<u8>,
+}
+
+impl From<KemKeyPair> for CccKemKeyPair {
+    fn from(kp: KemKeyPair) -> Self {
+        Self {
+            public_key: kp.public_key.clone(),
+            private_key: kp.private_key.clone(),
+        }
+    }
+}
+
+/// KEM encapsulation result — ciphertext + shared secret.
+pub struct CccKemEncapResult {
+    pub ciphertext: Vec<u8>,
+    pub shared_secret: Vec<u8>,
+}
+
+impl From<KemEncapResult> for CccKemEncapResult {
+    fn from(er: KemEncapResult) -> Self {
+        Self {
+            ciphertext: er.ciphertext.clone(),
+            shared_secret: er.shared_secret.clone(),
+        }
+    }
+}
+
+/// Per-algorithm self-test result.
+pub struct CccAlgoTestResult {
+    pub algo_id: u32,
+    pub algo_name: String,
+    pub passed: bool,
+    pub error_message: Option<String>,
+}
+
+impl From<&AlgoTestResult> for CccAlgoTestResult {
+    fn from(r: &AlgoTestResult) -> Self {
+        Self {
+            algo_id: r.algo_id,
+            algo_name: r.algo_name.clone(),
+            passed: r.passed,
+            error_message: r.error_message.clone(),
+        }
+    }
+}
+
+/// Aggregate self-test report.
+pub struct CccSelfTestReport {
+    pub provider_name: String,
+    pub results: Vec<CccAlgoTestResult>,
+    pub all_passed: bool,
+}
+
+impl From<SelfTestReport> for CccSelfTestReport {
+    fn from(report: SelfTestReport) -> Self {
+        Self {
+            provider_name: report.provider_name,
+            results: report.results.iter().map(CccAlgoTestResult::from).collect(),
+            all_passed: report.all_passed,
+        }
+    }
+}
+
+// ── Bridge error ─────────────────────────────────────────────────────────────
+
+/// Bridge-visible error type — maps 1:1 from `ccc_rust::CryptoError`.
+///
+/// FRB translates this into a Dart exception.
+#[derive(Debug)]
+pub enum CccCryptoError {
+    UnsupportedAlgorithm(String),
+    InvalidKey(String),
+    InvalidNonce(String),
+    AuthenticationFailed,
+    InvalidInput(String),
+    FeatureNotCompiled(String),
+    InternalError(String),
+}
+
+impl std::fmt::Display for CccCryptoError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::UnsupportedAlgorithm(s) => write!(f, "unsupported algorithm: {s}"),
+            Self::InvalidKey(s) => write!(f, "invalid key: {s}"),
+            Self::InvalidNonce(s) => write!(f, "invalid nonce: {s}"),
+            Self::AuthenticationFailed => write!(f, "authentication failed"),
+            Self::InvalidInput(s) => write!(f, "invalid input: {s}"),
+            Self::FeatureNotCompiled(s) => write!(f, "feature not compiled: {s}"),
+            Self::InternalError(s) => write!(f, "internal error: {s}"),
+        }
+    }
+}
+
+impl std::error::Error for CccCryptoError {}
+
+impl From<ccc_crypto_core::CryptoError> for CccCryptoError {
+    fn from(e: ccc_crypto_core::CryptoError) -> Self {
+        match e {
+            ccc_crypto_core::CryptoError::UnsupportedAlgorithm(s) => Self::UnsupportedAlgorithm(s),
+            ccc_crypto_core::CryptoError::InvalidKey(s) => Self::InvalidKey(s),
+            ccc_crypto_core::CryptoError::InvalidNonce(s) => Self::InvalidNonce(s),
+            ccc_crypto_core::CryptoError::AuthenticationFailed => Self::AuthenticationFailed,
+            ccc_crypto_core::CryptoError::InvalidInput(s) => Self::InvalidInput(s),
+            ccc_crypto_core::CryptoError::FeatureNotCompiled(s) => Self::FeatureNotCompiled(s),
+            ccc_crypto_core::CryptoError::InternalError(s) => Self::InternalError(s),
+        }
+    }
+}

rust/src/api/mod.rs

@@ -0,0 +1,3 @@
+pub mod crypto;
+pub mod dto;
+pub mod simple;

rust/src/api/simple.rs

@@ -0,0 +1,10 @@
+#[flutter_rust_bridge::frb(sync)] // Synchronous mode for simplicity of the demo
+pub fn greet(name: String) -> String {
+    format!("Hello, {name}!")
+}
+
+#[flutter_rust_bridge::frb(init)]
+pub fn init_app() {
+    // Default utilities - feel free to customize
+    flutter_rust_bridge::setup_default_user_utils();
+}

rust/src/lib.rs

@@ -0,0 +1,2 @@
+mod api;
+mod frb_generated;

src/CMakeLists.txt

@@ -1,22 +0,0 @@
-# The Flutter tooling requires that developers have CMake 3.10 or later
-# installed. You should not increase this version, as doing so will cause
-# the plugin to fail to compile for some customers of the plugin.
-cmake_minimum_required(VERSION 3.10)
-
-project(ccc_cryptography_library VERSION 0.0.1 LANGUAGES C)
-
-add_library(ccc_cryptography SHARED
-  "ccc_cryptography.c"
-)
-
-set_target_properties(ccc_cryptography PROPERTIES
-  PUBLIC_HEADER ccc_cryptography.h
-  OUTPUT_NAME "ccc_cryptography"
-)
-
-target_compile_definitions(ccc_cryptography PUBLIC DART_SHARED_LIB)
-
-if (ANDROID)
-  # Support Android 15 16k page size
-  target_link_options(ccc_cryptography PRIVATE "-Wl,-z,max-page-size=16384")
-endif()

src/ccc_cryptography.c

@@ -1,23 +0,0 @@
-#include "ccc_cryptography.h"
-
-// A very short-lived native function.
-//
-// For very short-lived functions, it is fine to call them on the main isolate.
-// They will block the Dart execution while running the native function, so
-// only do this for native functions which are guaranteed to be short-lived.
-FFI_PLUGIN_EXPORT int sum(int a, int b) { return a + b; }
-
-// A longer-lived native function, which occupies the thread calling it.
-//
-// Do not call these kind of native functions in the main isolate. They will
-// block Dart execution. This will cause dropped frames in Flutter applications.
-// Instead, call these native functions on a separate isolate.
-FFI_PLUGIN_EXPORT int sum_long_running(int a, int b) {
-  // Simulate work.
-#if _WIN32
-  Sleep(5000);
-#else
-  usleep(5000 * 1000);
-#endif
-  return a + b;
-}

src/ccc_cryptography.h

@@ -1,30 +0,0 @@
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-#if _WIN32
-#include <windows.h>
-#else
-#include <pthread.h>
-#include <unistd.h>
-#endif
-
-#if _WIN32
-#define FFI_PLUGIN_EXPORT __declspec(dllexport)
-#else
-#define FFI_PLUGIN_EXPORT
-#endif
-
-// A very short-lived native function.
-//
-// For very short-lived functions, it is fine to call them on the main isolate.
-// They will block the Dart execution while running the native function, so
-// only do this for native functions which are guaranteed to be short-lived.
-FFI_PLUGIN_EXPORT int sum(int a, int b);
-
-// A longer lived native function, which occupies the thread calling it.
-//
-// Do not call these kind of native functions in the main isolate. They will
-// block Dart execution. This will cause dropped frames in Flutter applications.
-// Instead, call these native functions on a separate isolate.
-FFI_PLUGIN_EXPORT int sum_long_running(int a, int b);

test_driver/integration_test.dart

@@ -0,0 +1,3 @@
+import 'package:integration_test/integration_test_driver.dart';
+
+Future<void> main() => integrationDriver();

windows/CMakeLists.txt

@@ -8,16 +8,13 @@ cmake_minimum_required(VERSION 3.14)
 set(PROJECT_NAME "ccc_cryptography")
 project(${PROJECT_NAME} LANGUAGES CXX)
 
-# Invoke the build for native code shared with the other target platforms.
+include("../cargokit/cmake/cargokit.cmake")
-# This can be changed to accommodate different builds.
+apply_cargokit(${PROJECT_NAME} ../rust ccc_cryptography "")
-add_subdirectory("${CMAKE_CURRENT_SOURCE_DIR}/../src" "${CMAKE_CURRENT_BINARY_DIR}/shared")
 
 # List of absolute paths to libraries that should be bundled with the plugin.
 # This list could contain prebuilt libraries, or libraries created by an
 # external build triggered from this build file.
 set(ccc_cryptography_bundled_libraries
-  # Defined in ../src/CMakeLists.txt.
+  "${${PROJECT_NAME}_cargokit_lib}"
-  # This can be changed to accommodate different builds.
-  $<TARGET_FILE:ccc_cryptography>
   PARENT_SCOPE
 )