def dumps(self, obj, signingPrivateKey, receipientPublicKey, eccCurve ,pickler=pickle):
'''Pickle and Encrypt a Python Object with AES / Encrypt AES Key with Receipient Public ECC Key / Signs Pickle with Sender Private Key'''
cryptoWrapper = CryptoWrapper();
encryptedPickle, aesKey = cryptoWrapper.aesEncrypt(self.picklePad + pickler.dumps(obj))
pickleSignature = cryptoWrapper.eccSign(signingPrivateKey, eccCurve, encryptedPickle)
encryptedKey = cryptoWrapper.eccEncrypt(receipientPublicKey, eccCurve, aesKey)
return encryptedPickle, encryptedKey, pickleSignature
def __verifyPickle__(self, encryptedPickle, verificationKey, eccCurve, signature):
'''Veryify Pickle Authenticity with RSA Signature - Return True if good Signature'''
crypto = CryptoWrapper()
if crypto.eccVerify(verificationKey, eccCurve, encryptedPickle, signature) is False:
raise Exception('Could not Verify Pickle')
os._exit(1)
else:
return True
def loads(self, encryptedPickle, encryptedKey, pickleSignature, receipientPrivateKey, verificationKey, eccCurve, pickler=pickle):
'''Checks Pickle Signature / Decrypts AES Key and Pickle and Loads Object'''
cryptoWrapper = CryptoWrapper()
try:
self.__verifyPickle__(encryptedPickle, verificationKey, eccCurve, pickleSignature)
except:
print 'Invalid Pickle - Not Decrypting'
raise Exception('Pickle Fails Signature Verification')
aesKey = cryptoWrapper.eccDecrypt(receipientPrivateKey, eccCurve, encryptedKey)
pickle = cryptoWrapper.aesDecrypt(aesKey, encryptedPickle)
# simple integrity check to verify that we got meaningful data
assert pickle.startswith(self.picklePad), "unexpected header"
return pickler.loads(pickle[len(self.picklePad):])
try:
self.__verifyPickle__(encryptedPickle, verificationKey, eccCurve, pickleSignature)
except:
print 'Invalid Pickle - Not Decrypting'
raise Exception('Pickle Fails Signature Verification')
aesKey = cryptoWrapper.eccDecrypt(receipientPrivateKey, eccCurve, encryptedKey)
pickle = cryptoWrapper.aesDecrypt(aesKey, encryptedPickle)
# simple integrity check to verify that we got meaningful data
assert pickle.startswith(self.picklePad), "unexpected header"
return pickler.loads(pickle[len(self.picklePad):])
if __name__ == '__main__':
'''Usage Examples'''
'''Instatiation of Crypto Wrapper - Generate Signing Key Pair and RSA Key Pair'''
crypto = CryptoWrapper()
signingKey, verificationKey, eccSignCurve = crypto.eccGenerate()
receipientPrivateKey, receipientPublicKey, eccCryptoCurve = crypto.eccGenerate()
'''Instatiation of Brine Module - Dumps Python object into Encyrpted Pickle'''
dict = {'object': 'to be', 'pickled': 'test case'}
brine = Brine()
encryptedPickle, encryptedKey, pickleSignature = brine.dumps(dict, signingKey, receipientPublicKey, eccSignCurve)
'''Unencrypt Pickle Object and Return object'''
unpickledObject = brine.loads(encryptedPickle, encryptedKey, pickleSignature, receipientPrivateKey, verificationKey, eccSignCurve)
print unpickledObject
