1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
# This file is dual licensed under the terms of the Apache License, Version
# 2.0, and the BSD License. See the LICENSE file in the root of this repository
# for complete details.
from __future__ import annotations
from cryptography.hazmat.primitives._cipheralgorithm import (
BlockCipherAlgorithm,
CipherAlgorithm,
_verify_key_size,
)
class ARC4(CipherAlgorithm):
name = "RC4"
key_sizes = frozenset([40, 56, 64, 80, 128, 160, 192, 256])
def __init__(self, key: bytes):
self.key = _verify_key_size(self, key)
@property
def key_size(self) -> int:
return len(self.key) * 8
class TripleDES(BlockCipherAlgorithm):
name = "3DES"
block_size = 64
key_sizes = frozenset([64, 128, 192])
def __init__(self, key: bytes):
if len(key) == 8:
key += key + key
elif len(key) == 16:
key += key[:8]
self.key = _verify_key_size(self, key)
@property
def key_size(self) -> int:
return len(self.key) * 8
class Blowfish(BlockCipherAlgorithm):
name = "Blowfish"
block_size = 64
key_sizes = frozenset(range(32, 449, 8))
def __init__(self, key: bytes):
self.key = _verify_key_size(self, key)
@property
def key_size(self) -> int:
return len(self.key) * 8
class CAST5(BlockCipherAlgorithm):
name = "CAST5"
block_size = 64
key_sizes = frozenset(range(40, 129, 8))
def __init__(self, key: bytes):
self.key = _verify_key_size(self, key)
@property
def key_size(self) -> int:
return len(self.key) * 8
class SEED(BlockCipherAlgorithm):
name = "SEED"
block_size = 128
key_sizes = frozenset([128])
def __init__(self, key: bytes):
self.key = _verify_key_size(self, key)
@property
def key_size(self) -> int:
return len(self.key) * 8
class IDEA(BlockCipherAlgorithm):
name = "IDEA"
block_size = 64
key_sizes = frozenset([128])
def __init__(self, key: bytes):
self.key = _verify_key_size(self, key)
@property
def key_size(self) -> int:
return len(self.key) * 8
# This class only allows RC2 with a 128-bit key. No support for
# effective key bits or other key sizes is provided.
class RC2(BlockCipherAlgorithm):
name = "RC2"
block_size = 64
key_sizes = frozenset([128])
def __init__(self, key: bytes):
self.key = _verify_key_size(self, key)
@property
def key_size(self) -> int:
return len(self.key) * 8
|
