Package tlslite :: Package utils :: Module tripledes |
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# Source Code for Module tlslite.utils.tripledes

     1  # Author: Trevor Perrin
     2  # See the LICENSE file for legal information regarding use of this file.
     3
     4  """Abstract class for 3DES."""
     5
     6 -class TripleDES(object):
     7 -    def __init__(self, key, mode, IV, implementation):
     8          if len(key) != 24:
     9              raise ValueError()
    10          if mode != 2:
    11              raise ValueError()
    12          if len(IV) != 8:
    13              raise ValueError()
    14          self.isBlockCipher = True
    15          self.block_size = 8
    16          self.implementation = implementation
    17          self.name = "3des"
    18
    19      #CBC-Mode encryption, returns ciphertext
    20      #WARNING: *MAY* modify the input as well
    21 -    def encrypt(self, plaintext):
    22          assert(len(plaintext) % 8 == 0)
    23
    24      #CBC-Mode decryption, returns plaintext
    25      #WARNING: *MAY* modify the input as well
    26 -    def decrypt(self, ciphertext):
    27          assert(len(ciphertext) % 8 == 0)
    28