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comparison plugins/password/helpers/dovecot_hmacmd5.php @ 0:1e000243b222

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vanilla 1.3.3 distro, I hope
author Charlie Root
date Thu, 04 Jan 2018 15:50:29 -0500
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-1:000000000000 0:1e000243b222
1 <?php
2
3 /**
4 *
5 * dovecot_hmacmd5.php V1.01
6 *
7 * Generates HMAC-MD5 'contexts' for Dovecot's password files.
8 *
9 * (C) 2008 Hajo Noerenberg
10 *
11 * http://www.noerenberg.de/hajo/pub/dovecot_hmacmd5.php.txt
12 *
13 * Most of the code has been shamelessly stolen from various sources:
14 *
15 * (C) Paul Johnston 1999 - 2000 / http://pajhome.org.uk/crypt/md5/
16 * (C) William K. Cole 2008 / http://www.scconsult.com/bill/crampass.pl
17 * (C) Borfast 2002 / http://www.zend.com/code/codex.php?ozid=962&single=1
18 * (C) Thomas Weber / http://pajhome.org.uk/crypt/md5/contrib/md5.java.txt
19 *
20 *
21 * This program is free software: you can redistribute it and/or modify
22 * it under the terms of the GNU General Public License version 3.0 as
23 * published by the Free Software Foundation.
24 *
25 * This program is distributed in the hope that it will be useful,
26 * but WITHOUT ANY WARRANTY; without even the implied warranty of
27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28 * GNU General Public License for more details.
29 *
30 * You should have received a copy of the GNU General Public License along
31 * with this program. If not, see <http://www.gnu.org/licenses/gpl-3.0.txt>.
32 *
33 */
34
35 /* Convert a 32-bit number to a hex string with ls-byte first
36 */
37
38 function rhex($n) {
39 $hex_chr = "0123456789abcdef"; $r = '';
40 for($j = 0; $j <= 3; $j++)
41 $r .= $hex_chr[($n >> ($j * 8 + 4)) & 0x0F] . $hex_chr[($n >> ($j * 8)) & 0x0F];
42 return $r;
43 }
44
45 /* zeroFill() is needed because PHP doesn't have a zero-fill
46 * right shift operator like JavaScript's >>>
47 */
48
49 function zeroFill($a, $b) {
50 $z = hexdec(80000000);
51 if ($z & $a) {
52 $a >>= 1;
53 $a &= (~$z);
54 $a |= 0x40000000;
55 $a >>= ($b-1);
56 } else {
57 $a >>= $b;
58 }
59 return $a;
60 }
61
62 /* Bitwise rotate a 32-bit number to the left
63 */
64
65 function bit_rol($num, $cnt) {
66 return ($num << $cnt) | (zeroFill($num, (32 - $cnt)));
67 }
68
69 /* Add integers, wrapping at 2^32
70 */
71
72 function safe_add($x, $y) {
73 return (($x&0x7FFFFFFF) + ($y&0x7FFFFFFF)) ^ ($x&0x80000000) ^ ($y&0x80000000);
74 }
75
76 /* These functions implement the four basic operations the algorithm uses.
77 */
78
79 function md5_cmn($q, $a, $b, $x, $s, $t) {
80 return safe_add(bit_rol(safe_add(safe_add($a, $q), safe_add($x, $t)), $s), $b);
81 }
82 function md5_ff($a, $b, $c, $d, $x, $s, $t) {
83 return md5_cmn(($b & $c) | ((~$b) & $d), $a, $b, $x, $s, $t);
84 }
85 function md5_gg($a, $b, $c, $d, $x, $s, $t) {
86 return md5_cmn(($b & $d) | ($c & (~$d)), $a, $b, $x, $s, $t);
87 }
88 function md5_hh($a, $b, $c, $d, $x, $s, $t) {
89 return md5_cmn($b ^ $c ^ $d, $a, $b, $x, $s, $t);
90 }
91 function md5_ii($a, $b, $c, $d, $x, $s, $t) {
92 return md5_cmn($c ^ ($b | (~$d)), $a, $b, $x, $s, $t);
93 }
94
95 /* Calculate the first round of the MD5 algorithm
96 */
97
98 function md5_oneround($s, $io) {
99
100 $s = str_pad($s, 64, chr(0x00));
101
102 $x = array_fill(0, 16, 0);
103
104 for($i = 0; $i < 64; $i++)
105 $x[$i >> 2] |= (($io ? 0x36 : 0x5c) ^ ord($s[$i])) << (($i % 4) * 8);
106
107 $a = $olda = 1732584193;
108 $b = $oldb = -271733879;
109 $c = $oldc = -1732584194;
110 $d = $oldd = 271733878;
111
112 $a = md5_ff($a, $b, $c, $d, $x[ 0], 7 , -680876936);
113 $d = md5_ff($d, $a, $b, $c, $x[ 1], 12, -389564586);
114 $c = md5_ff($c, $d, $a, $b, $x[ 2], 17, 606105819);
115 $b = md5_ff($b, $c, $d, $a, $x[ 3], 22, -1044525330);
116 $a = md5_ff($a, $b, $c, $d, $x[ 4], 7 , -176418897);
117 $d = md5_ff($d, $a, $b, $c, $x[ 5], 12, 1200080426);
118 $c = md5_ff($c, $d, $a, $b, $x[ 6], 17, -1473231341);
119 $b = md5_ff($b, $c, $d, $a, $x[ 7], 22, -45705983);
120 $a = md5_ff($a, $b, $c, $d, $x[ 8], 7 , 1770035416);
121 $d = md5_ff($d, $a, $b, $c, $x[ 9], 12, -1958414417);
122 $c = md5_ff($c, $d, $a, $b, $x[10], 17, -42063);
123 $b = md5_ff($b, $c, $d, $a, $x[11], 22, -1990404162);
124 $a = md5_ff($a, $b, $c, $d, $x[12], 7 , 1804603682);
125 $d = md5_ff($d, $a, $b, $c, $x[13], 12, -40341101);
126 $c = md5_ff($c, $d, $a, $b, $x[14], 17, -1502002290);
127 $b = md5_ff($b, $c, $d, $a, $x[15], 22, 1236535329);
128
129 $a = md5_gg($a, $b, $c, $d, $x[ 1], 5 , -165796510);
130 $d = md5_gg($d, $a, $b, $c, $x[ 6], 9 , -1069501632);
131 $c = md5_gg($c, $d, $a, $b, $x[11], 14, 643717713);
132 $b = md5_gg($b, $c, $d, $a, $x[ 0], 20, -373897302);
133 $a = md5_gg($a, $b, $c, $d, $x[ 5], 5 , -701558691);
134 $d = md5_gg($d, $a, $b, $c, $x[10], 9 , 38016083);
135 $c = md5_gg($c, $d, $a, $b, $x[15], 14, -660478335);
136 $b = md5_gg($b, $c, $d, $a, $x[ 4], 20, -405537848);
137 $a = md5_gg($a, $b, $c, $d, $x[ 9], 5 , 568446438);
138 $d = md5_gg($d, $a, $b, $c, $x[14], 9 , -1019803690);
139 $c = md5_gg($c, $d, $a, $b, $x[ 3], 14, -187363961);
140 $b = md5_gg($b, $c, $d, $a, $x[ 8], 20, 1163531501);
141 $a = md5_gg($a, $b, $c, $d, $x[13], 5 , -1444681467);
142 $d = md5_gg($d, $a, $b, $c, $x[ 2], 9 , -51403784);
143 $c = md5_gg($c, $d, $a, $b, $x[ 7], 14, 1735328473);
144 $b = md5_gg($b, $c, $d, $a, $x[12], 20, -1926607734);
145
146 $a = md5_hh($a, $b, $c, $d, $x[ 5], 4 , -378558);
147 $d = md5_hh($d, $a, $b, $c, $x[ 8], 11, -2022574463);
148 $c = md5_hh($c, $d, $a, $b, $x[11], 16, 1839030562);
149 $b = md5_hh($b, $c, $d, $a, $x[14], 23, -35309556);
150 $a = md5_hh($a, $b, $c, $d, $x[ 1], 4 , -1530992060);
151 $d = md5_hh($d, $a, $b, $c, $x[ 4], 11, 1272893353);
152 $c = md5_hh($c, $d, $a, $b, $x[ 7], 16, -155497632);
153 $b = md5_hh($b, $c, $d, $a, $x[10], 23, -1094730640);
154 $a = md5_hh($a, $b, $c, $d, $x[13], 4 , 681279174);
155 $d = md5_hh($d, $a, $b, $c, $x[ 0], 11, -358537222);
156 $c = md5_hh($c, $d, $a, $b, $x[ 3], 16, -722521979);
157 $b = md5_hh($b, $c, $d, $a, $x[ 6], 23, 76029189);
158 $a = md5_hh($a, $b, $c, $d, $x[ 9], 4 , -640364487);
159 $d = md5_hh($d, $a, $b, $c, $x[12], 11, -421815835);
160 $c = md5_hh($c, $d, $a, $b, $x[15], 16, 530742520);
161 $b = md5_hh($b, $c, $d, $a, $x[ 2], 23, -995338651);
162
163 $a = md5_ii($a, $b, $c, $d, $x[ 0], 6 , -198630844);
164 $d = md5_ii($d, $a, $b, $c, $x[ 7], 10, 1126891415);
165 $c = md5_ii($c, $d, $a, $b, $x[14], 15, -1416354905);
166 $b = md5_ii($b, $c, $d, $a, $x[ 5], 21, -57434055);
167 $a = md5_ii($a, $b, $c, $d, $x[12], 6 , 1700485571);
168 $d = md5_ii($d, $a, $b, $c, $x[ 3], 10, -1894986606);
169 $c = md5_ii($c, $d, $a, $b, $x[10], 15, -1051523);
170 $b = md5_ii($b, $c, $d, $a, $x[ 1], 21, -2054922799);
171 $a = md5_ii($a, $b, $c, $d, $x[ 8], 6 , 1873313359);
172 $d = md5_ii($d, $a, $b, $c, $x[15], 10, -30611744);
173 $c = md5_ii($c, $d, $a, $b, $x[ 6], 15, -1560198380);
174 $b = md5_ii($b, $c, $d, $a, $x[13], 21, 1309151649);
175 $a = md5_ii($a, $b, $c, $d, $x[ 4], 6 , -145523070);
176 $d = md5_ii($d, $a, $b, $c, $x[11], 10, -1120210379);
177 $c = md5_ii($c, $d, $a, $b, $x[ 2], 15, 718787259);
178 $b = md5_ii($b, $c, $d, $a, $x[ 9], 21, -343485551);
179
180 $a = safe_add($a, $olda);
181 $b = safe_add($b, $oldb);
182 $c = safe_add($c, $oldc);
183 $d = safe_add($d, $oldd);
184
185 return rhex($a) . rhex($b) . rhex($c) . rhex($d);
186 }
187
188 function dovecot_hmacmd5 ($s) {
189 if (strlen($s) > 64) $s=pack("H*", md5($s));
190 return md5_oneround($s, 0) . md5_oneround($s, 1);
191 }