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"""Cryptlib RC4 implementation."""
from cryptomath import *
from RC4 import RC4
if cryptlibpyLoaded:
def new(key):
return Cryptlib_RC4(key)
class Cryptlib_RC4(RC4):
def __init__(self, key):
RC4.__init__(self, key, "cryptlib")
self.context = cryptlib_py.cryptCreateContext(cryptlib_py.CRYPT_UNUSED, cryptlib_py.CRYPT_ALGO_RC4)
cryptlib_py.cryptSetAttribute(self.context, cryptlib_py.CRYPT_CTXINFO_KEYSIZE, len(key))
cryptlib_py.cryptSetAttributeString(self.context, cryptlib_py.CRYPT_CTXINFO_KEY, key)
def __del__(self):
cryptlib_py.cryptDestroyContext(self.context)
def encrypt(self, plaintext):
bytes = stringToBytes(plaintext)
cryptlib_py.cryptEncrypt(self.context, bytes)
return bytesToString(bytes)
def decrypt(self, ciphertext):
return self.encrypt(ciphertext)
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