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WIP: working on the reading of picseal image files

This commit is contained in:
JohnE 2016-12-01 00:17:05 -08:00
parent 9e403dc268
commit 1fea208349
2 changed files with 17 additions and 9 deletions
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9
libs/jpg_bin.py
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@ -25,7 +25,14 @@ from libs.jpg_fp import JpgFingerprint
# #
class JpgBin: class JpgBin:
BUF_CHUNK_SIZE = 2048 BUF_CHUNK_SIZE = 8192
soi_marker = b'\xff\xd8'
eof_marker = b'\xff\xd9'
app15_marker = b'\xff\xef'
# ascii code for "picseal"
picseal_marker = b'\x70\x69\x63\x73\x65\x61\x6C'
def __init__(self): def __init__(self):
self.data_buf = None self.data_buf = None

17
libs/jpg_bin_w.py
View File

@ -1,13 +1,12 @@
# #
# #
# #
from libs.jpg_bin import JpgBin
class JpgBinWrite: class JpgBinWrite:
soi_marker = b'\xff\xd8'
eof_marker = b'\xff\xd9'
picseal_marker = b'\xff\xef'
# picseal_marker = b'\xff\xe0'
# #
def __init__(self, jpg_in, jpg_out): def __init__(self, jpg_in, jpg_out):
self.fhr = jpg_in self.fhr = jpg_in
@ -41,8 +40,10 @@ class JpgBinWrite:
size += len(crypto_sig.hash_data) size += len(crypto_sig.hash_data)
size += len(keyder) size += len(keyder)
# write app marker
self.fhw.write(JpgBin.app15_marker)
# write picseal marker # write picseal marker
self.fhw.write(JpgBinWrite.picseal_marker) self.fhw.write(JpgBin.picseal_marker)
# write the size of picseal record # write the size of picseal record
self.fhw.write(size.to_bytes(2, byteorder='big')) self.fhw.write(size.to_bytes(2, byteorder='big'))
# write hash of image # write hash of image
@ -84,8 +85,8 @@ class JpgBinWrite:
# #
def __writeJpgHeader(self): def __writeJpgHeader(self):
self.fhw.write(bytes(JpgBinWrite.soi_marker)) self.fhw.write(bytes(JpgBin.soi_marker))
# #
def __writeJpgFooter(self): def __writeJpgFooter(self):
self.fhw.write(bytes(JpgBinWrite.eof_marker)) self.fhw.write(bytes(JpgBin.eof_marker))