ILIAS  release_5-4 Revision v5.4.26-12-gabc799a52e6
MD5.php
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1<?php
2
4
5class MD5
6{
7 // Context
8
12 private $a;
13
17 private $b;
18
22 private $c;
23
27 private $d;
28
32 public function __construct()
33 {
34 $this->reset();
35 }
36
40 public function reset(): void
41 {
42 $this->a = 0x67452301;
43 $this->b = 0xEFCDAB89;
44 $this->c = 0x98BADCFE;
45 $this->d = 0x10325476;
46 }
47
53 public function getContext()
54 {
55 $s = '';
56 foreach (['a', 'b', 'c', 'd'] as $i) {
57 $v = $this->{$i};
58 $s .= chr($v & 0xff);
59 $s .= chr(($v >> 8) & 0xff);
60 $s .= chr(($v >> 16) & 0xff);
61 $s .= chr(($v >> 24) & 0xff);
62 }
63
64 return $s;
65 }
66
72 public function add(string $data): void
73 {
74 $words = array_values(unpack('V16', $data));
75
76 $A = $this->a;
77 $B = $this->b;
78 $C = $this->c;
79 $D = $this->d;
80
81 $F = ['self', 'f'];
82 $G = ['self', 'g'];
83 $H = ['self', 'h'];
84 $I = ['self', 'i'];
85
86 // ROUND 1
87 self::step($F, $A, $B, $C, $D, $words[0], 7, 0xd76aa478);
88 self::step($F, $D, $A, $B, $C, $words[1], 12, 0xe8c7b756);
89 self::step($F, $C, $D, $A, $B, $words[2], 17, 0x242070db);
90 self::step($F, $B, $C, $D, $A, $words[3], 22, 0xc1bdceee);
91 self::step($F, $A, $B, $C, $D, $words[4], 7, 0xf57c0faf);
92 self::step($F, $D, $A, $B, $C, $words[5], 12, 0x4787c62a);
93 self::step($F, $C, $D, $A, $B, $words[6], 17, 0xa8304613);
94 self::step($F, $B, $C, $D, $A, $words[7], 22, 0xfd469501);
95 self::step($F, $A, $B, $C, $D, $words[8], 7, 0x698098d8);
96 self::step($F, $D, $A, $B, $C, $words[9], 12, 0x8b44f7af);
97 self::step($F, $C, $D, $A, $B, $words[10], 17, 0xffff5bb1);
98 self::step($F, $B, $C, $D, $A, $words[11], 22, 0x895cd7be);
99 self::step($F, $A, $B, $C, $D, $words[12], 7, 0x6b901122);
100 self::step($F, $D, $A, $B, $C, $words[13], 12, 0xfd987193);
101 self::step($F, $C, $D, $A, $B, $words[14], 17, 0xa679438e);
102 self::step($F, $B, $C, $D, $A, $words[15], 22, 0x49b40821);
103
104 // ROUND 2
105 self::step($G, $A, $B, $C, $D, $words[1], 5, 0xf61e2562);
106 self::step($G, $D, $A, $B, $C, $words[6], 9, 0xc040b340);
107 self::step($G, $C, $D, $A, $B, $words[11], 14, 0x265e5a51);
108 self::step($G, $B, $C, $D, $A, $words[0], 20, 0xe9b6c7aa);
109 self::step($G, $A, $B, $C, $D, $words[5], 5, 0xd62f105d);
110 self::step($G, $D, $A, $B, $C, $words[10], 9, 0x02441453);
111 self::step($G, $C, $D, $A, $B, $words[15], 14, 0xd8a1e681);
112 self::step($G, $B, $C, $D, $A, $words[4], 20, 0xe7d3fbc8);
113 self::step($G, $A, $B, $C, $D, $words[9], 5, 0x21e1cde6);
114 self::step($G, $D, $A, $B, $C, $words[14], 9, 0xc33707d6);
115 self::step($G, $C, $D, $A, $B, $words[3], 14, 0xf4d50d87);
116 self::step($G, $B, $C, $D, $A, $words[8], 20, 0x455a14ed);
117 self::step($G, $A, $B, $C, $D, $words[13], 5, 0xa9e3e905);
118 self::step($G, $D, $A, $B, $C, $words[2], 9, 0xfcefa3f8);
119 self::step($G, $C, $D, $A, $B, $words[7], 14, 0x676f02d9);
120 self::step($G, $B, $C, $D, $A, $words[12], 20, 0x8d2a4c8a);
121
122 // ROUND 3
123 self::step($H, $A, $B, $C, $D, $words[5], 4, 0xfffa3942);
124 self::step($H, $D, $A, $B, $C, $words[8], 11, 0x8771f681);
125 self::step($H, $C, $D, $A, $B, $words[11], 16, 0x6d9d6122);
126 self::step($H, $B, $C, $D, $A, $words[14], 23, 0xfde5380c);
127 self::step($H, $A, $B, $C, $D, $words[1], 4, 0xa4beea44);
128 self::step($H, $D, $A, $B, $C, $words[4], 11, 0x4bdecfa9);
129 self::step($H, $C, $D, $A, $B, $words[7], 16, 0xf6bb4b60);
130 self::step($H, $B, $C, $D, $A, $words[10], 23, 0xbebfbc70);
131 self::step($H, $A, $B, $C, $D, $words[13], 4, 0x289b7ec6);
132 self::step($H, $D, $A, $B, $C, $words[0], 11, 0xeaa127fa);
133 self::step($H, $C, $D, $A, $B, $words[3], 16, 0xd4ef3085);
134 self::step($H, $B, $C, $D, $A, $words[6], 23, 0x04881d05);
135 self::step($H, $A, $B, $C, $D, $words[9], 4, 0xd9d4d039);
136 self::step($H, $D, $A, $B, $C, $words[12], 11, 0xe6db99e5);
137 self::step($H, $C, $D, $A, $B, $words[15], 16, 0x1fa27cf8);
138 self::step($H, $B, $C, $D, $A, $words[2], 23, 0xc4ac5665);
139
140 // ROUND 4
141 self::step($I, $A, $B, $C, $D, $words[0], 6, 0xf4292244);
142 self::step($I, $D, $A, $B, $C, $words[7], 10, 0x432aff97);
143 self::step($I, $C, $D, $A, $B, $words[14], 15, 0xab9423a7);
144 self::step($I, $B, $C, $D, $A, $words[5], 21, 0xfc93a039);
145 self::step($I, $A, $B, $C, $D, $words[12], 6, 0x655b59c3);
146 self::step($I, $D, $A, $B, $C, $words[3], 10, 0x8f0ccc92);
147 self::step($I, $C, $D, $A, $B, $words[10], 15, 0xffeff47d);
148 self::step($I, $B, $C, $D, $A, $words[1], 21, 0x85845dd1);
149 self::step($I, $A, $B, $C, $D, $words[8], 6, 0x6fa87e4f);
150 self::step($I, $D, $A, $B, $C, $words[15], 10, 0xfe2ce6e0);
151 self::step($I, $C, $D, $A, $B, $words[6], 15, 0xa3014314);
152 self::step($I, $B, $C, $D, $A, $words[13], 21, 0x4e0811a1);
153 self::step($I, $A, $B, $C, $D, $words[4], 6, 0xf7537e82);
154 self::step($I, $D, $A, $B, $C, $words[11], 10, 0xbd3af235);
155 self::step($I, $C, $D, $A, $B, $words[2], 15, 0x2ad7d2bb);
156 self::step($I, $B, $C, $D, $A, $words[9], 21, 0xeb86d391);
157
158 $this->a = ($this->a + $A) & 0xffffffff;
159 $this->b = ($this->b + $B) & 0xffffffff;
160 $this->c = ($this->c + $C) & 0xffffffff;
161 $this->d = ($this->d + $D) & 0xffffffff;
162 }
163
164 private static function f(int $X, int $Y, int $Z)
165 {
166 return ($X & $Y) | ((~$X) & $Z); // X AND Y OR NOT X AND Z
167 }
168
169 private static function g(int $X, int $Y, int $Z)
170 {
171 return ($X & $Z) | ($Y & (~$Z)); // X AND Z OR Y AND NOT Z
172 }
173
174 private static function h(int $X, int $Y, int $Z)
175 {
176 return $X ^ $Y ^ $Z; // X XOR Y XOR Z
177 }
178
179 private static function i(int $X, int $Y, int $Z)
180 {
181 return $Y ^ ($X | (~$Z)); // Y XOR (X OR NOT Z)
182 }
183
184 private static function step($func, int &$A, int $B, int $C, int $D, int $M, int $s, int $t): void
185 {
186 $A = ($A + call_user_func($func, $B, $C, $D) + $M + $t) & 0xffffffff;
187 $A = self::rotate($A, $s);
188 $A = ($B + $A) & 0xffffffff;
189 }
190
191 private static function rotate(int $decimal, int $bits)
192 {
193 $binary = str_pad(decbin($decimal), 32, '0', STR_PAD_LEFT);
194
195 return bindec(substr($binary, $bits) . substr($binary, 0, $bits));
196 }
197}
An exception for terminatinating execution or to throw for unit testing.
getContext()
Get MD5 stream context.
Definition: MD5.php:53
static g(int $X, int $Y, int $Z)
Definition: MD5.php:169
static rotate(int $decimal, int $bits)
Definition: MD5.php:191
__construct()
MD5 stream constructor.
Definition: MD5.php:32
add(string $data)
Add data to context.
Definition: MD5.php:72
static step($func, int &$A, int $B, int $C, int $D, int $M, int $s, int $t)
Definition: MD5.php:184
static f(int $X, int $Y, int $Z)
Definition: MD5.php:164
reset()
Reset the MD5 stream context.
Definition: MD5.php:40
static i(int $X, int $Y, int $Z)
Definition: MD5.php:179
static h(int $X, int $Y, int $Z)
Definition: MD5.php:174
$i
Definition: disco.tpl.php:19
$G
Definition: langwiz.php:805
$X
Definition: test.php:23
$s
Definition: pwgen.php:45