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
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
# 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
import sys
import six
from cryptography import utils
from cryptography.hazmat.primitives import interfaces
def _bit_length(x):
if sys.version_info >= (2, 7):
return x.bit_length()
else:
return len(bin(x)) - (2 + (x <= 0))
@utils.register_interface(interfaces.RSAPublicKey)
class RSAPublicKey(object):
def __init__(self, public_exponent, modulus):
if (
not isinstance(public_exponent, six.integer_types) or
not isinstance(modulus, six.integer_types)
):
raise TypeError("RSAPublicKey arguments must be integers")
if modulus < 3:
raise ValueError("modulus must be >= 3")
if public_exponent < 3 or public_exponent >= modulus:
raise ValueError("public_exponent must be >= 3 and < modulus")
if public_exponent & 1 == 0:
raise ValueError("public_exponent must be odd")
self._public_exponent = public_exponent
self._modulus = modulus
@property
def key_size(self):
return _bit_length(self.modulus)
@property
def public_exponent(self):
return self._public_exponent
@property
def modulus(self):
return self._modulus
@property
def e(self):
return self.public_exponent
@property
def n(self):
return self.modulus
@utils.register_interface(interfaces.RSAPrivateKey)
class RSAPrivateKey(object):
def __init__(self, p, q, private_exponent, dmp1, dmq1, iqmp,
public_exponent, modulus):
if (
not isinstance(p, six.integer_types) or
not isinstance(q, six.integer_types) or
not isinstance(dmp1, six.integer_types) or
not isinstance(dmq1, six.integer_types) or
not isinstance(iqmp, six.integer_types) or
not isinstance(private_exponent, six.integer_types) or
not isinstance(public_exponent, six.integer_types) or
not isinstance(modulus, six.integer_types)
):
raise TypeError("RSAPrivateKey arguments must be integers")
if modulus < 3:
raise ValueError("modulus must be >= 3")
if p >= modulus:
raise ValueError("p must be < modulus")
if q >= modulus:
raise ValueError("q must be < modulus")
if dmp1 >= modulus:
raise ValueError("dmp1 must be < modulus")
if dmq1 >= modulus:
raise ValueError("dmq1 must be < modulus")
if iqmp >= modulus:
raise ValueError("iqmp must be < modulus")
if private_exponent >= modulus:
raise ValueError("private_exponent must be < modulus")
if public_exponent < 3 or public_exponent >= modulus:
raise ValueError("public_exponent must be >= 3 and < modulus")
if public_exponent & 1 == 0:
raise ValueError("public_exponent must be odd")
if dmp1 & 1 == 0:
raise ValueError("dmp1 must be odd")
if dmq1 & 1 == 0:
raise ValueError("dmq1 must be odd")
if p * q != modulus:
raise ValueError("p*q must equal modulus")
self._p = p
self._q = q
self._dmp1 = dmp1
self._dmq1 = dmq1
self._iqmp = iqmp
self._private_exponent = private_exponent
self._public_exponent = public_exponent
self._modulus = modulus
@classmethod
def generate(self, public_exponent, key_size, backend):
return backend.generate_rsa_private_key(public_exponent, key_size)
@property
def key_size(self):
return _bit_length(self.modulus)
def public_key(self):
return RSAPublicKey(self.public_exponent, self.modulus)
@property
def p(self):
return self._p
@property
def q(self):
return self._q
@property
def private_exponent(self):
return self._private_exponent
@property
def public_exponent(self):
return self._public_exponent
@property
def modulus(self):
return self._modulus
@property
def d(self):
return self.private_exponent
@property
def dmp1(self):
return self._dmp1
@property
def dmq1(self):
return self._dmq1
@property
def iqmp(self):
return self._iqmp
@property
def e(self):
return self.public_exponent
@property
def n(self):
return self.modulus
|
