107 lines
2.2 KiB
Python
107 lines
2.2 KiB
Python
#
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# This Class Provides Crypto Functions
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#
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import logging
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from Crypto.Signature import PKCS1_v1_5
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from Crypto.PublicKey import RSA
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from Crypto.Hash import SHA512
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class Signature:
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#
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def __init__(self):
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self.key_data = None
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self.pub_key = None
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self.sig_data = None
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self.hash_data = None
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self.hh = SHA512.new()
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#
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def genSig(self):
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signer = PKCS1_v1_5.new(self.key_data)
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self.sig_data = signer.sign(self.hh)
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#
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def verifySig(self, hshh, bin_sig):
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verifier = PKCS1_v1_5.new(self.pub_key)
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return verifier.verify(hshh, bin_sig)
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#
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def genKeys(self):
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logging.info("Generating public keys...")
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self.key_data = RSA.generate(4096)
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self.pub_key = self.key_data.publickey()
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logging.debug("public key==\n{}".format(self.pub_key.exportKey('PEM')))
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logging.debug("private key (and pub, other info)==\n{}".format(self.key_data.exportKey('PEM')))
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#
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def importPubKey(self, bin_pubkey):
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self.pub_key = RSA.importKey(bin_pubkey)
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#
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def importPvtKey(self, bin_pvtkey):
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self.key_data = RSA.importKey(bin_pvtkey)
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#
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# Private key also includes public key data...SO ANNOYING!
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#
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def getPvtKeyPEM(self):
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return self.key_data.exportKey('PEM')
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#
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def getPubKeyPEM(self):
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return self.pub_key.exportKey('PEM')
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#
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def getPvtKeyDER(self):
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return self.key_data.exportKey('DER')
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#
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def getPubKeyDER(self):
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return self.pub_key.exportKey('DER')
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#
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def getSignature(self):
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return sig_data
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#
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def getNewHashHandle(self):
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self.hh = SHA512.new()
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return self.hh
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#
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def hashBin(self, bin_data):
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hshh = SHA512.new()
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hshh.update(bin_data)
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img_hash = hshh.digest()
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return img_hash
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#
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# TESTING
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#
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#
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def _test():
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#logging.basicConfig(level=logging.DEBUG)
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msg = b'Hieee, this is a test =)'
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sig = Signature()
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sig.hh.update(msg)
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sig.hash_data = sig.hh.digest()
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sig.genSig()
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print("Hash created:\n{}".format(sig.hash_data))
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print("Size=={}".format(str(len(sig.hash_data))))
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print("Signature created:\n{}".format(sig.sig_data))
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print("Size=={}".format(str(len(sig.sig_data))))
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isVerified = sig.verifySig(sig.hh, sig.sig_data)
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print("isVerified=={}".format(str(isVerified)))
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if __name__ == '__main__':
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_test()
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