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
188
189
190
191
192
193
194
195
196
197
198
|
# -*- coding: utf-8 -*-
import os
import sys
from Bcfg2.Compat import b64decode
from mock import Mock, MagicMock, patch
# add all parent testsuite directories to sys.path to allow (most)
# relative imports in python 2.4
path = os.path.dirname(__file__)
while path != "/":
if os.path.basename(path).lower().startswith("test"):
sys.path.append(path)
if os.path.basename(path) == "testsuite":
break
path = os.path.dirname(path)
from common import *
try:
from Bcfg2.Encryption import *
class TestEncryption(Bcfg2TestCase):
plaintext = """foo bar
baz
ö
\t\tquux
""" + "a" * 16384 # 16K is completely arbitrary
iv = "0123456789ABCDEF"
salt = "01234567"
algo = "des_cbc"
def test_str_crypt(self):
""" test str_encrypt/str_decrypt """
key = "a simple key"
# simple symmetrical test with no options
crypted = str_encrypt(self.plaintext, key)
self.assertEqual(self.plaintext, str_decrypt(crypted, key))
# symmetrical test with lots of options
crypted = str_encrypt(self.plaintext, key,
iv=self.iv, salt=self.salt,
algorithm=self.algo)
self.assertEqual(self.plaintext,
str_decrypt(crypted, key, iv=self.iv,
algorithm=self.algo))
# test that different algorithms are actually used
self.assertNotEqual(str_encrypt(self.plaintext, key),
str_encrypt(self.plaintext, key,
algorithm=self.algo))
# test that different keys are actually used
self.assertNotEqual(str_encrypt(self.plaintext, key),
str_encrypt(self.plaintext, "different key"))
# test that different IVs are actually used
self.assertNotEqual(str_encrypt(self.plaintext, key, iv=self.iv),
str_encrypt(self.plaintext, key))
# test that errors are raised on bad decrypts
crypted = str_encrypt(self.plaintext, key, algorithm=self.algo)
self.assertRaises(EVPError, str_decrypt,
crypted, "bogus key", algorithm=self.algo)
self.assertRaises(EVPError, str_decrypt,
crypted, key) # bogus algorithm
def test_ssl_crypt(self):
""" test ssl_encrypt/ssl_decrypt """
passwd = "a simple passphrase"
# simple symmetrical test
crypted = ssl_encrypt(self.plaintext, passwd)
self.assertEqual(self.plaintext, ssl_decrypt(crypted, passwd))
# more complex symmetrical test
crypted = ssl_encrypt(self.plaintext, passwd, algorithm=self.algo,
salt=self.salt)
self.assertEqual(self.plaintext,
ssl_decrypt(crypted, passwd, algorithm=self.algo))
# test that different algorithms are actually used
self.assertNotEqual(ssl_encrypt(self.plaintext, passwd),
ssl_encrypt(self.plaintext, passwd,
algorithm=self.algo))
# test that different passwords are actually used
self.assertNotEqual(ssl_encrypt(self.plaintext, passwd),
ssl_encrypt(self.plaintext, "different pass"))
# there's no reasonable test we can do to see if the
# output is base64-encoded, unfortunately, but if it's
# obviously not we fail
crypted = ssl_encrypt(self.plaintext, passwd)
self.assertRegexpMatches(crypted, r'^[A-Za-z0-9+/]+[=]{0,2}$')
# test that errors are raised on bad decrypts
crypted = ssl_encrypt(self.plaintext, passwd,
algorithm=self.algo)
self.assertRaises(EVPError, ssl_decrypt,
crypted, "bogus passwd", algorithm=self.algo)
self.assertRaises(EVPError, ssl_decrypt,
crypted, passwd) # bogus algorithm
def test_get_algorithm(self):
setup = Mock()
# we don't care what the default is, as long as there is
# one
setup.cfp.get.return_value = ALGORITHM
self.assertRegexpMatches(get_algorithm(setup),
r'^[a-z0-9]+_[a-z0-9_]+$')
setup.cfp.get.assert_called_with(CFG_SECTION, CFG_ALGORITHM,
default=ALGORITHM)
setup.cfp.get.return_value = self.algo
self.assertEqual(get_algorithm(setup), self.algo)
setup.cfp.get.assert_called_with(CFG_SECTION, CFG_ALGORITHM,
default=ALGORITHM)
# test that get_algorithm converts algorithms given in
# OpenSSL style to M2Crypto style
setup.cfp.get.return_value = "DES-EDE3-CFB8"
self.assertEqual(get_algorithm(setup), "des_ede3_cfb8")
setup.cfp.get.assert_called_with(CFG_SECTION, CFG_ALGORITHM,
default=ALGORITHM)
def test_get_passphrases(self):
setup = Mock()
setup.cfp.has_section.return_value = False
self.assertEqual(get_passphrases(setup), dict())
setup.cfp.has_section.return_value = True
setup.cfp.options.return_value = ["foo", "bar", CFG_ALGORITHM]
setup.cfp.get.return_value = "passphrase"
self.assertItemsEqual(get_passphrases(setup),
dict(foo="passphrase",
bar="passphrase"))
@patch("Bcfg2.Encryption.get_passphrases")
def test_bruteforce_decrypt(self, mock_passphrases):
passwd = "a simple passphrase"
crypted = ssl_encrypt(self.plaintext, passwd)
setup = Mock()
# test with no passphrases given nor in config
mock_passphrases.return_value = dict()
self.assertRaises(EVPError,
bruteforce_decrypt,
crypted, setup=setup)
mock_passphrases.assert_called_with(setup)
# test with good passphrase given in function call
mock_passphrases.reset_mock()
self.assertEqual(self.plaintext,
bruteforce_decrypt(crypted,
passphrases=["bogus pass",
passwd,
"also bogus"]))
self.assertFalse(mock_passphrases.called)
# test with no good passphrase given nor in config
mock_passphrases.reset_mock()
self.assertRaises(EVPError,
bruteforce_decrypt,
crypted, passphrases=["bogus", "also bogus"])
self.assertFalse(mock_passphrases.called)
# test with good passphrase in config file
mock_passphrases.reset_mock()
mock_passphrases.return_value = dict(bogus="bogus",
real=passwd,
bogus2="also bogus")
self.assertEqual(self.plaintext,
bruteforce_decrypt(crypted, setup=setup))
mock_passphrases.assert_called_with(setup)
# test that passphrases given in function call take
# precedence over config
mock_passphrases.reset_mock()
self.assertRaises(EVPError,
bruteforce_decrypt,
crypted, setup=setup,
passphrases=["bogus", "also bogus"])
self.assertFalse(mock_passphrases.called)
# test that different algorithms are used
mock_passphrases.reset_mock()
self.assertRaises(EVPError,
bruteforce_decrypt,
crypted, setup=setup, algorithm=self.algo)
mock_passphrases.reset_mock()
crypted = ssl_encrypt(self.plaintext, passwd, algorithm=self.algo)
self.assertEqual(self.plaintext,
bruteforce_decrypt(crypted, setup=setup,
algorithm=self.algo))
except ImportError:
pass
|
