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
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from __future__ import absolute_import, division, print_function
from cryptography import utils
from cryptography.hazmat.primitives import interfaces
@utils.register_interface(interfaces.CipherAlgorithm)
class AES(object):
name = "AES"
block_size = 128
key_sizes = frozenset([128, 192, 256])
def __init__(self, key):
self.key = key
# Verify that the key size matches the expected key size
if self.key_size not in self.key_sizes:
raise ValueError("Invalid key size ({0}) for {1}".format(
self.key_size, self.name
))
@property
def key_size(self):
return len(self.key) * 8
@utils.register_interface(interfaces.CipherAlgorithm)
class Camellia(object):
name = "camellia"
block_size = 128
key_sizes = frozenset([128, 192, 256])
def __init__(self, key):
self.key = key
# Verify that the key size matches the expected key size
if self.key_size not in self.key_sizes:
raise ValueError("Invalid key size ({0}) for {1}".format(
self.key_size, self.name
))
@property
def key_size(self):
return len(self.key) * 8
@utils.register_interface(interfaces.CipherAlgorithm)
class TripleDES(object):
name = "3DES"
block_size = 64
key_sizes = frozenset([64, 128, 192])
def __init__(self, key):
if len(key) == 8:
key += key + key
elif len(key) == 16:
key += key[:8]
self.key = key
# Verify that the key size matches the expected key size
if self.key_size not in self.key_sizes:
raise ValueError("Invalid key size ({0}) for {1}".format(
self.key_size, self.name
))
@property
def key_size(self):
return len(self.key) * 8
@utils.register_interface(interfaces.CipherAlgorithm)
class Blowfish(object):
name = "Blowfish"
block_size = 64
key_sizes = frozenset(range(32, 449, 8))
def __init__(self, key):
self.key = key
# Verify that the key size matches the expected key size
if self.key_size not in self.key_sizes:
raise ValueError("Invalid key size ({0}) for {1}".format(
self.key_size, self.name
))
@property
def key_size(self):
return len(self.key) * 8
@utils.register_interface(interfaces.CipherAlgorithm)
class CAST5(object):
name = "CAST5"
block_size = 64
key_sizes = frozenset([40, 48, 56, 64, 72, 80, 88, 96, 104, 112, 120, 128])
def __init__(self, key):
self.key = key
# Verify that the key size matches the expected key size
if self.key_size not in self.key_sizes:
raise ValueError("Invalid key size ({0}) for {1}".format(
self.key_size, self.name
))
@property
def key_size(self):
return len(self.key) * 8
@utils.register_interface(interfaces.CipherAlgorithm)
class ARC4(object):
name = "RC4"
block_size = 1
key_sizes = frozenset([40, 56, 64, 80, 128, 192, 256])
def __init__(self, key):
self.key = key
# Verify that the key size matches the expected key size
if self.key_size not in self.key_sizes:
raise ValueError("Invalid key size ({0}) for {1}".format(
self.key_size, self.name
))
@property
def key_size(self):
return len(self.key) * 8
|
