27 lines
768 B
Python
27 lines
768 B
Python
"""Abstract class for 3DES."""
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from compat import * #For True
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class TripleDES:
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def __init__(self, key, mode, IV, implementation):
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if len(key) != 24:
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raise ValueError()
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if mode != 2:
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raise ValueError()
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if len(IV) != 8:
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raise ValueError()
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self.isBlockCipher = True
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self.block_size = 8
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self.implementation = implementation
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self.name = "3des"
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#CBC-Mode encryption, returns ciphertext
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#WARNING: *MAY* modify the input as well
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def encrypt(self, plaintext):
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assert(len(plaintext) % 8 == 0)
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#CBC-Mode decryption, returns plaintext
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#WARNING: *MAY* modify the input as well
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def decrypt(self, ciphertext):
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assert(len(ciphertext) % 8 == 0)
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