|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
/* |
|
4
|
|
|
* The RandomLib library for securely generating random numbers and strings in PHP |
|
5
|
|
|
* |
|
6
|
|
|
* @author Anthony Ferrara <[email protected]> |
|
7
|
|
|
* @copyright 2011 The Authors |
|
8
|
|
|
* @license http://www.opensource.org/licenses/mit-license.html MIT License |
|
9
|
|
|
* @version Build @@version@@ |
|
10
|
|
|
*/ |
|
11
|
|
|
|
|
12
|
|
|
/** |
|
13
|
|
|
* An abstract mixer to implement a common mixing strategy |
|
14
|
|
|
* |
|
15
|
|
|
* PHP version 5.3 |
|
16
|
|
|
* |
|
17
|
|
|
* @category PHPSecurityLib |
|
18
|
|
|
* @package Random |
|
19
|
|
|
* |
|
20
|
|
|
* @author Anthony Ferrara <[email protected]> |
|
21
|
|
|
* @copyright 2011 The Authors |
|
22
|
|
|
* @license http://www.opensource.org/licenses/mit-license.html MIT License |
|
23
|
|
|
* |
|
24
|
|
|
* @version Build @@version@@ |
|
25
|
|
|
*/ |
|
26
|
|
|
namespace RandomLib; |
|
27
|
|
|
|
|
28
|
|
|
use SecurityLib\Util; |
|
29
|
|
|
|
|
30
|
|
|
/** |
|
31
|
|
|
* An abstract mixer to implement a common mixing strategy |
|
32
|
|
|
* |
|
33
|
|
|
* @see http://tools.ietf.org/html/rfc4086#section-5.2 |
|
34
|
|
|
* |
|
35
|
|
|
* @category PHPSecurityLib |
|
36
|
|
|
* @package Random |
|
37
|
|
|
* |
|
38
|
|
|
* @author Anthony Ferrara <[email protected]> |
|
39
|
|
|
*/ |
|
40
|
|
|
abstract class AbstractMixer implements \RandomLib\Mixer |
|
41
|
|
|
{ |
|
42
|
|
|
|
|
43
|
|
|
/** |
|
44
|
|
|
* Get the block size (the size of the individual blocks used for the mixing) |
|
45
|
|
|
* |
|
46
|
|
|
* @return int The block size |
|
47
|
|
|
*/ |
|
48
|
|
|
abstract protected function getPartSize(); |
|
49
|
|
|
|
|
50
|
|
|
/** |
|
51
|
|
|
* Mix 2 parts together using one method |
|
52
|
|
|
* |
|
53
|
|
|
* @param string $part1 The first part to mix |
|
54
|
|
|
* @param string $part2 The second part to mix |
|
55
|
|
|
* |
|
56
|
|
|
* @return string The mixed data |
|
57
|
|
|
*/ |
|
58
|
|
|
abstract protected function mixParts1($part1, $part2); |
|
59
|
|
|
|
|
60
|
|
|
/** |
|
61
|
|
|
* Mix 2 parts together using another different method |
|
62
|
|
|
* |
|
63
|
|
|
* @param string $part1 The first part to mix |
|
64
|
|
|
* @param string $part2 The second part to mix |
|
65
|
|
|
* |
|
66
|
|
|
* @return string The mixed data |
|
67
|
|
|
*/ |
|
68
|
|
|
abstract protected function mixParts2($part1, $part2); |
|
69
|
|
|
|
|
70
|
|
|
/** |
|
71
|
|
|
* Mix the provided array of strings into a single output of the same size |
|
72
|
|
|
* |
|
73
|
|
|
* All elements of the array should be the same size. |
|
74
|
|
|
* |
|
75
|
|
|
* @param array $parts The parts to be mixed |
|
76
|
|
|
* |
|
77
|
|
|
* @return string The mixed result |
|
78
|
|
|
*/ |
|
79
|
|
|
public function mix(array $parts) |
|
80
|
|
|
{ |
|
81
|
|
|
if (empty($parts)) { |
|
82
|
|
|
return ''; |
|
83
|
|
|
} |
|
84
|
|
|
$len = Util::safeStrlen($parts[0]); |
|
85
|
|
|
$parts = $this->normalizeParts($parts); |
|
86
|
|
|
$stringSize = count($parts[0]); |
|
87
|
|
|
$partsSize = count($parts); |
|
88
|
|
|
$result = ''; |
|
89
|
|
|
$offset = 0; |
|
90
|
|
|
for ($i = 0; $i < $stringSize; $i++) { |
|
91
|
|
|
$stub = $parts[$offset][$i]; |
|
92
|
|
|
for ($j = 1; $j < $partsSize; $j++) { |
|
93
|
|
|
$newKey = $parts[($j + $offset) % $partsSize][$i]; |
|
94
|
|
|
//Alternately mix the output for each source |
|
95
|
|
|
if ($j % 2 == 1) { |
|
96
|
|
|
$stub ^= $this->mixParts1($stub, $newKey); |
|
97
|
|
|
} else { |
|
98
|
|
|
$stub ^= $this->mixParts2($stub, $newKey); |
|
99
|
|
|
} |
|
100
|
|
|
} |
|
101
|
|
|
$result .= $stub; |
|
102
|
|
|
$offset = ($offset + 1) % $partsSize; |
|
103
|
|
|
} |
|
104
|
|
|
|
|
105
|
|
|
return Util::safeSubstr($result, 0, $len); |
|
106
|
|
|
} |
|
107
|
|
|
|
|
108
|
|
|
/** |
|
109
|
|
|
* Normalize the part array and split it block part size. |
|
110
|
|
|
* |
|
111
|
|
|
* This will make all parts the same length and a multiple |
|
112
|
|
|
* of the part size |
|
113
|
|
|
* |
|
114
|
|
|
* @param array $parts The parts to normalize |
|
115
|
|
|
* |
|
116
|
|
|
* @return array The normalized and split parts |
|
117
|
|
|
*/ |
|
118
|
|
|
protected function normalizeParts(array $parts) |
|
119
|
|
|
{ |
|
120
|
|
|
$blockSize = $this->getPartSize(); |
|
121
|
|
|
$callback = function ($value) { |
|
122
|
|
|
return Util::safeStrlen($value); |
|
123
|
|
|
}; |
|
124
|
|
|
$maxSize = max(array_map($callback, $parts)); |
|
125
|
|
|
if ($maxSize % $blockSize != 0) { |
|
126
|
|
|
$maxSize += $blockSize - ($maxSize % $blockSize); |
|
127
|
|
|
} |
|
128
|
|
|
foreach ($parts as &$part) { |
|
129
|
|
|
$part = $this->str_pad($part, $maxSize, chr(0)); |
|
130
|
|
|
$part = str_split($part, $blockSize); |
|
131
|
|
|
} |
|
132
|
|
|
|
|
133
|
|
|
return $parts; |
|
134
|
|
|
} |
|
135
|
|
|
|
|
136
|
|
|
private function str_pad($string, $size, $character) |
|
|
|
|
|
|
137
|
|
|
{ |
|
138
|
|
|
$start = Util::safeStrlen($string); |
|
139
|
|
|
$inc = Util::safeStrlen($character); |
|
140
|
|
|
for ($i = $start; $i < $size; $i+= $inc) { |
|
141
|
|
|
$string = $string . $character; |
|
142
|
|
|
} |
|
143
|
|
|
|
|
144
|
|
|
return Util::safeSubstr($string, 0, $size); |
|
145
|
|
|
} |
|
146
|
|
|
|
|
147
|
|
|
private function str_split($string, $size) |
|
|
|
|
|
|
148
|
|
|
{ |
|
149
|
|
|
$blocks = array(); |
|
150
|
|
|
$length = Util::safeStrlen($string); |
|
151
|
|
|
$parts = ceil($length / $size); |
|
152
|
|
|
for ($i = 0; $i < $parts; $i++) { |
|
153
|
|
|
$blocks[] = Util::safeSubstr($string, $i * $length, $length); |
|
154
|
|
|
} |
|
155
|
|
|
|
|
156
|
|
|
return $blocks; |
|
157
|
|
|
} |
|
158
|
|
|
} |
|
159
|
|
|
|
ircmaxell /
RandomLib
Loading history...
This check looks for method names that are not written in camelCase.
In camelCase names are written without any punctuation, the start of each new word being marked by a capital letter. Thus the name database connection seeker becomes
databaseConnectionSeeker.