-
Notifications
You must be signed in to change notification settings - Fork 141
/
test-blockfeeder.py
148 lines (118 loc) · 4.78 KB
/
test-blockfeeder.py
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
# The MIT License (MIT)
#
# Copyright (c) 2014 Richard Moore
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
import sys
sys.path.append('../pyaes')
import os
import random
try:
from StringIO import StringIO
except:
import io
StringIO = io.BytesIO
import pyaes
from pyaes.blockfeeder import Decrypter, Encrypter
from pyaes import decrypt_stream, encrypt_stream
from pyaes.util import to_bufferable
key = os.urandom(32)
plaintext = os.urandom(1000)
for mode_name in pyaes.AESModesOfOperation:
mode = pyaes.AESModesOfOperation[mode_name]
print(mode.name)
kw = dict(key = key)
if mode_name in ('cbc', 'cfb', 'ofb'):
kw['iv'] = os.urandom(16)
encrypter = Encrypter(mode(**kw))
ciphertext = to_bufferable('')
# Feed the encrypter random number of bytes at a time
index = 0
while index < len(plaintext):
length = random.randint(1, 128)
if index + length > len(plaintext): length = len(plaintext) - index
ciphertext += encrypter.feed(plaintext[index: index + length])
index += length
ciphertext += encrypter.feed(None)
decrypter = Decrypter(mode(**kw))
decrypted = to_bufferable('')
# Feed the decrypter random number of bytes at a time
index = 0
while index < len(ciphertext):
length = random.randint(1, 128)
if index + length > len(ciphertext): length = len(ciphertext) - index
decrypted += decrypter.feed(ciphertext[index: index + length])
index += length
decrypted += decrypter.feed(None)
passed = decrypted == plaintext
cipher_length = len(ciphertext)
print(" cipher-length=%(cipher_length)s passed=%(passed)s" % locals())
# Test block modes of operation with no padding
plaintext = os.urandom(1024)
for mode_name in ['ecb', 'cbc']:
mode = pyaes.AESModesOfOperation[mode_name]
print(mode.name + ' (no padding)')
kw = dict(key = key)
if mode_name == 'cbc':
kw['iv'] = os.urandom(16)
encrypter = Encrypter(mode(**kw), padding = pyaes.PADDING_NONE)
ciphertext = to_bufferable('')
# Feed the encrypter random number of bytes at a time
index = 0
while index < len(plaintext):
length = random.randint(1, 128)
if index + length > len(plaintext): length = len(plaintext) - index
ciphertext += encrypter.feed(plaintext[index: index + length])
index += length
ciphertext += encrypter.feed(None)
if len(ciphertext) != len(plaintext):
print(' failed to encrypt with correct padding')
decrypter = Decrypter(mode(**kw), padding = pyaes.PADDING_NONE)
decrypted = to_bufferable('')
# Feed the decrypter random number of bytes at a time
index = 0
while index < len(ciphertext):
length = random.randint(1, 128)
if index + length > len(ciphertext): length = len(ciphertext) - index
decrypted += decrypter.feed(ciphertext[index: index + length])
index += length
decrypted += decrypter.feed(None)
passed = decrypted == plaintext
cipher_length = len(ciphertext)
print(" cipher-length=%(cipher_length)s passed=%(passed)s" % locals())
plaintext = os.urandom(1000)
for mode_name in pyaes.AESModesOfOperation:
mode = pyaes.AESModesOfOperation[mode_name]
print(mode.name + ' (stream operations)')
kw = dict(key = key)
if mode_name in ('cbc', 'cfb', 'ofb'):
kw['iv'] = os.urandom(16)
moo = mode(**kw)
output = StringIO()
pyaes.encrypt_stream(moo, StringIO(plaintext), output)
output.seek(0)
ciphertext = output.read()
moo = mode(**kw)
output = StringIO()
pyaes.decrypt_stream(moo, StringIO(ciphertext), output)
output.seek(0)
decrypted = output.read()
passed = decrypted == plaintext
cipher_length = len(ciphertext)
print(" cipher-length=%(cipher_length)s passed=%(passed)s" % locals())