141 lines
3.3 KiB
Python
141 lines
3.3 KiB
Python
# This file is dual licensed under the terms of the Apache License, Version
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# 2.0, and the BSD License. See the LICENSE file in the root of this repository
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# for complete details.
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from __future__ import absolute_import, division, print_function
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from cryptography import utils
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from cryptography.hazmat.primitives.ciphers import (
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BlockCipherAlgorithm, CipherAlgorithm
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)
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def _verify_key_size(algorithm, key):
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# Verify that the key size matches the expected key size
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if len(key) * 8 not in algorithm.key_sizes:
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raise ValueError("Invalid key size ({0}) for {1}.".format(
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len(key) * 8, algorithm.name
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))
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return key
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@utils.register_interface(BlockCipherAlgorithm)
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@utils.register_interface(CipherAlgorithm)
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class AES(object):
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name = "AES"
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block_size = 128
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key_sizes = frozenset([128, 192, 256])
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def __init__(self, key):
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self.key = _verify_key_size(self, key)
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@property
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def key_size(self):
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return len(self.key) * 8
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@utils.register_interface(BlockCipherAlgorithm)
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@utils.register_interface(CipherAlgorithm)
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class Camellia(object):
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name = "camellia"
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block_size = 128
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key_sizes = frozenset([128, 192, 256])
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def __init__(self, key):
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self.key = _verify_key_size(self, key)
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@property
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def key_size(self):
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return len(self.key) * 8
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@utils.register_interface(BlockCipherAlgorithm)
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@utils.register_interface(CipherAlgorithm)
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class TripleDES(object):
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name = "3DES"
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block_size = 64
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key_sizes = frozenset([64, 128, 192])
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def __init__(self, key):
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if len(key) == 8:
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key += key + key
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elif len(key) == 16:
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key += key[:8]
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self.key = _verify_key_size(self, key)
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@property
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def key_size(self):
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return len(self.key) * 8
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@utils.register_interface(BlockCipherAlgorithm)
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@utils.register_interface(CipherAlgorithm)
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class Blowfish(object):
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name = "Blowfish"
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block_size = 64
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key_sizes = frozenset(range(32, 449, 8))
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def __init__(self, key):
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self.key = _verify_key_size(self, key)
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@property
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def key_size(self):
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return len(self.key) * 8
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@utils.register_interface(BlockCipherAlgorithm)
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@utils.register_interface(CipherAlgorithm)
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class CAST5(object):
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name = "CAST5"
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block_size = 64
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key_sizes = frozenset(range(40, 129, 8))
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def __init__(self, key):
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self.key = _verify_key_size(self, key)
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@property
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def key_size(self):
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return len(self.key) * 8
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@utils.register_interface(CipherAlgorithm)
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class ARC4(object):
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name = "RC4"
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key_sizes = frozenset([40, 56, 64, 80, 128, 160, 192, 256])
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def __init__(self, key):
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self.key = _verify_key_size(self, key)
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@property
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def key_size(self):
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return len(self.key) * 8
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@utils.register_interface(CipherAlgorithm)
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class IDEA(object):
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name = "IDEA"
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block_size = 64
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key_sizes = frozenset([128])
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def __init__(self, key):
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self.key = _verify_key_size(self, key)
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@property
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def key_size(self):
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return len(self.key) * 8
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@utils.register_interface(BlockCipherAlgorithm)
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@utils.register_interface(CipherAlgorithm)
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class SEED(object):
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name = "SEED"
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block_size = 128
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key_sizes = frozenset([128])
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def __init__(self, key):
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self.key = _verify_key_size(self, key)
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@property
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def key_size(self):
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return len(self.key) * 8
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