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