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
|
<?php
class Encryption_test extends CI_TestCase {
public function set_up()
{
$this->ci_set_config('encryption_key', "\xd0\xc9\x08\xc4\xde\x52\x12\x6e\xf8\xcc\xdb\x03\xea\xa0\x3a\x5c");
$this->encryption = new CI_Encryption();
$this->ci_instance_var('encryption', $this->encryption);
}
// --------------------------------------------------------------------
public function test_portability()
{
if ( ! $this->encryption->drivers['mcrypt'] OR ! $this->encryption->drivers['openssl'])
{
$this->markTestAsSkipped('Both MCrypt and OpenSSL support are required for portability tests.');
return;
}
$message = 'This is a message encrypted via MCrypt and decrypted via OpenSSL, or vice-versa.';
// Format is: <Cipher name>, <Cipher mode>, <Key size>
$portable = array(
array('aes-128', 'cbc', 16),
array('aes-128', 'cfb', 16),
array('aes-128', 'cfb8', 16),
array('aes-128', 'ofb', 16),
array('aes-128', 'ecb', 16),
array('aes-128', 'ctr', 16),
array('aes-192', 'cbc', 24),
array('aes-192', 'cfb', 24),
array('aes-192', 'cfb8', 24),
array('aes-192', 'ofb', 24),
array('aes-192', 'ecb', 24),
array('aes-192', 'ctr', 24),
array('aes-256', 'cbc', 32),
array('aes-256', 'cfb', 32),
array('aes-256', 'cfb8', 32),
array('aes-256', 'ofb', 32),
array('aes-256', 'ecb', 32),
array('aes-256', 'ctr', 32),
array('des', 'cbc', 7),
array('des', 'cfb', 7),
array('des', 'cfb8', 7),
array('des', 'ofb', 7),
array('des', 'ecb', 7),
array('tripledes', 'cbc', 7),
array('tripledes', 'cfb', 7),
array('tripledes', 'cfb8', 7),
array('tripledes', 'ofb', 7),
array('tripledes', 'cbc', 14),
array('tripledes', 'cfb', 14),
array('tripledes', 'cfb8', 14),
array('tripledes', 'ofb', 14),
array('tripledes', 'cbc', 21),
array('tripledes', 'cfb', 21),
array('tripledes', 'cfb8', 21),
array('tripledes', 'ofb', 21),
array('blowfish', 'cbc', 16),
array('blowfish', 'cfb', 16),
array('blowfish', 'ofb', 16),
array('blowfish', 'ecb', 16),
array('blowfish', 'cbc', 56),
array('blowfish', 'cfb', 56),
array('blowfish', 'ofb', 56),
array('blowfish', 'ecb', 56),
);
$driver_index = array('mcrypt', 'openssl');
foreach ($portable as &$test)
{
// Add some randomness to the selected driver
$driver = mt_rand(0,1);
$params = array(
'cipher' => $test[0],
'mode' => $test[1],
'key' => openssl_random_pseudo_bytes($test[2])
);
$this->encryption->initialize(array('driver' => $driver_index[$driver]));
$ciphertext = $this->encryption->encrypt($message, $params);
$driver = (int) ! $driver;
$this->encryption->initialize(array('driver' => $driver_index[$driver]));
$this->assertEquals($message, $this->encryption->decrypt($ciphertext, $params));
}
}
// --------------------------------------------------------------------
public function test_hkdf()
{
// Test vectors are described in RFC5869, Appendix A(1-3).
// Vectors 4-7 cover SHA-1, which we don't support.
//
// URL: https://tools.ietf.org/rfc/rfc5869.txt
//
// Our implementation doesn't split into hkdf_extract(), hkdf_expand()
// and therefore we can't test for the PRK value (it is included below
// just for consistency, hence why it's also commented out).
//
// As long as OKM is correct, then we're all fine though.
$vectors = array(
// Appendix A.1: Basic test case with SHA-256
array(
'digest' => 'sha256',
'ikm' => "\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b",
'salt' => "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c",
'length' => 42,
'info' => "\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9",
// 'prk' => "\x07\x77\x09\x36\x2c\x2e\x32\xdf\x0d\xdc\x3f\x0d\xc4\x7b\xba\x63\x90\xb6\xc7\x3b\xb5\x0f\x9c\x31\x22\xec\x84\x4a\xd7\xc2\xb3\xe5",
'okm' => "\x3c\xb2\x5f\x25\xfa\xac\xd5\x7a\x90\x43\x4f\x64\xd0\x36\x2f\x2a\x2d\x2d\x0a\x90\xcf\x1a\x5a\x4c\x5d\xb0\x2d\x56\xec\xc4\xc5\xbf\x34\x00\x72\x08\xd5\xb8\x87\x18\x58\x65"
),
// Appendix A.2: Test with SHA-256 and longer inputs/outputs
array(
'digest' => 'sha256',
'ikm' => "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f\x20\x21\x22\x23\x24\x25\x26\x27\x28\x29\x2a\x2b\x2c\x2d\x2e\x2f\x30\x31\x32\x33\x34\x35\x36\x37\x38\x39\x3a\x3b\x3c\x3d\x3e\x3f\x40\x41\x42\x43\x44\x45\x46\x47\x48\x49\x4a\x4b\x4c\x4d\x4e\x4f",
'salt' => "\x60\x61\x62\x63\x64\x65\x66\x67\x68\x69\x6a\x6b\x6c\x6d\x6e\x6f\x70\x71\x72\x73\x74\x75\x76\x77\x78\x79\x7a\x7b\x7c\x7d\x7e\x7f\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf",
'length' => 82,
'info' => "\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff",
// 'prk' => "\x06\xa6\xb8\x8c\x58\x53\x36\x1a\x06\x10\x4c\x9c\xeb\x35\xb4\x5c\xef\x76\x00\x14\x90\x46\x71\x01\x4a\x19\x3f\x40\xc1\x5f\xc2\x44",
'okm' => "\xb1\x1e\x39\x8d\xc8\x03\x27\xa1\xc8\xe7\xf7\x8c\x59\x6a\x49\x34\x4f\x01\x2e\xda\x2d\x4e\xfa\xd8\xa0\x50\xcc\x4c\x19\xaf\xa9\x7c\x59\x04\x5a\x99\xca\xc7\x82\x72\x71\xcb\x41\xc6\x5e\x59\x0e\x09\xda\x32\x75\x60\x0c\x2f\x09\xb8\x36\x77\x93\xa9\xac\xa3\xdb\x71\xcc\x30\xc5\x81\x79\xec\x3e\x87\xc1\x4c\x01\xd5\xc1\xf3\x43\x4f\x1d\x87",
),
// Appendix A.3: Test with SHA-256 and zero-length salt/info
array(
'digest' => 'sha256',
'ikm' => "\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b",
'salt' => "",
'length' => 42,
'info' => "",
// 'prk' => "\x19\xef\x24\xa3\x2c\x71\x7b\x16\x7f\x33\xa9\x1d\x6f\x64\x8b\xdf\x96\x59\x67\x76\xaf\xdb\x63\x77\xac\x43\x4c\x1c\x29\x3c\xcb\x04",
'okm' => "\x8d\xa4\xe7\x75\xa5\x63\xc1\x8f\x71\x5f\x80\x2a\x06\x3c\x5a\x31\xb8\xa1\x1f\x5c\x5e\xe1\x87\x9e\xc3\x45\x4e\x5f\x3c\x73\x8d\x2d\x9d\x20\x13\x95\xfa\xa4\xb6\x1a\x96\xc8",
)
);
foreach ($vectors as $test)
{
$this->assertEquals(
$test['okm'],
$this->encryption->hkdf(
$test['ikm'],
$test['digest'],
$test['salt'],
$test['length'],
$test['info']
)
);
}
// Test default length, it must match the digest size
$this->assertEquals(64, strlen($this->encryption->hkdf('foobar', 'sha512')));
// Test maximum length (RFC5869 says that it must be up to 255 times the digest size)
$this->assertEquals(12240, strlen($this->encryption->hkdf('foobar', 'sha384', NULL, 48 * 255)));
$this->assertFalse($this->encryption->hkdf('foobar', 'sha224', NULL, 28 * 255 + 1));
}
}
|
