diff options
Diffstat (limited to 'src/lib/tlslite/utils/Cryptlib_TripleDES.py')
| -rwxr-xr-x | src/lib/tlslite/utils/Cryptlib_TripleDES.py | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/lib/tlslite/utils/Cryptlib_TripleDES.py b/src/lib/tlslite/utils/Cryptlib_TripleDES.py new file mode 100755 index 000000000..a4f8155a0 --- /dev/null +++ b/src/lib/tlslite/utils/Cryptlib_TripleDES.py @@ -0,0 +1,35 @@ +"""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)
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