/gdata/tlslite/utils/Cryptlib_TripleDES.py
http://radioappz.googlecode.com/ · Python · 35 lines · 25 code · 9 blank · 1 comment · 1 complexity · 1555865aa5eaf7f952ccb0846e2a6583 MD5 · raw file
- """Cryptlib 3DES implementation."""
- from cryptomath import *
- from TripleDES import *
- if cryptlibpyLoaded:
- def new(key, mode, IV):
- return Cryptlib_TripleDES(key, mode, IV)
- class Cryptlib_TripleDES(TripleDES):
- def __init__(self, key, mode, IV):
- TripleDES.__init__(self, key, mode, IV, "cryptlib")
- self.context = cryptlib_py.cryptCreateContext(cryptlib_py.CRYPT_UNUSED, cryptlib_py.CRYPT_ALGO_3DES)
- cryptlib_py.cryptSetAttribute(self.context, cryptlib_py.CRYPT_CTXINFO_MODE, cryptlib_py.CRYPT_MODE_CBC)
- cryptlib_py.cryptSetAttribute(self.context, cryptlib_py.CRYPT_CTXINFO_KEYSIZE, len(key))
- cryptlib_py.cryptSetAttributeString(self.context, cryptlib_py.CRYPT_CTXINFO_KEY, key)
- cryptlib_py.cryptSetAttributeString(self.context, cryptlib_py.CRYPT_CTXINFO_IV, IV)
- def __del__(self):
- cryptlib_py.cryptDestroyContext(self.context)
- def encrypt(self, plaintext):
- TripleDES.encrypt(self, plaintext)
- bytes = stringToBytes(plaintext)
- cryptlib_py.cryptEncrypt(self.context, bytes)
- return bytesToString(bytes)
- def decrypt(self, ciphertext):
- TripleDES.decrypt(self, ciphertext)
- bytes = stringToBytes(ciphertext)
- cryptlib_py.cryptDecrypt(self.context, bytes)
- return bytesToString(bytes)