diff options
Diffstat (limited to 'plugins/password/helpers/dovecot_hmacmd5.php')
| -rw-r--r-- | plugins/password/helpers/dovecot_hmacmd5.php | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/plugins/password/helpers/dovecot_hmacmd5.php b/plugins/password/helpers/dovecot_hmacmd5.php new file mode 100644 index 000000000..644b5377e --- /dev/null +++ b/plugins/password/helpers/dovecot_hmacmd5.php @@ -0,0 +1,191 @@ +<?php + +/** + * + * dovecot_hmacmd5.php V1.01 + * + * Generates HMAC-MD5 'contexts' for Dovecot's password files. + * + * (C) 2008 Hajo Noerenberg + * + * http://www.noerenberg.de/hajo/pub/dovecot_hmacmd5.php.txt + * + * Most of the code has been shamelessly stolen from various sources: + * + * (C) Paul Johnston 1999 - 2000 / http://pajhome.org.uk/crypt/md5/ + * (C) William K. Cole 2008 / http://www.scconsult.com/bill/crampass.pl + * (C) Borfast 2002 / http://www.zend.com/code/codex.php?ozid=962&single=1 + * (C) Thomas Weber / http://pajhome.org.uk/crypt/md5/contrib/md5.java.txt + * + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 3.0 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program. If not, see <http://www.gnu.org/licenses/gpl-3.0.txt>. + * + */ + +/* Convert a 32-bit number to a hex string with ls-byte first + */ + +function rhex($n) { + $hex_chr = "0123456789abcdef"; $r = ''; + for($j = 0; $j <= 3; $j++) + $r .= $hex_chr[($n >> ($j * 8 + 4)) & 0x0F] . $hex_chr[($n >> ($j * 8)) & 0x0F]; + return $r; +} + +/* zeroFill() is needed because PHP doesn't have a zero-fill + * right shift operator like JavaScript's >>> + */ + +function zeroFill($a, $b) { + $z = hexdec(80000000); + if ($z & $a) { + $a >>= 1; + $a &= (~$z); + $a |= 0x40000000; + $a >>= ($b-1); + } else { + $a >>= $b; + } + return $a; +} + +/* Bitwise rotate a 32-bit number to the left + */ + +function bit_rol($num, $cnt) { + return ($num << $cnt) | (zeroFill($num, (32 - $cnt))); +} + +/* Add integers, wrapping at 2^32 + */ + +function safe_add($x, $y) { + return (($x&0x7FFFFFFF) + ($y&0x7FFFFFFF)) ^ ($x&0x80000000) ^ ($y&0x80000000); +} + +/* These functions implement the four basic operations the algorithm uses. + */ + +function md5_cmn($q, $a, $b, $x, $s, $t) { + return safe_add(bit_rol(safe_add(safe_add($a, $q), safe_add($x, $t)), $s), $b); +} +function md5_ff($a, $b, $c, $d, $x, $s, $t) { + return md5_cmn(($b & $c) | ((~$b) & $d), $a, $b, $x, $s, $t); +} +function md5_gg($a, $b, $c, $d, $x, $s, $t) { + return md5_cmn(($b & $d) | ($c & (~$d)), $a, $b, $x, $s, $t); +} +function md5_hh($a, $b, $c, $d, $x, $s, $t) { + return md5_cmn($b ^ $c ^ $d, $a, $b, $x, $s, $t); +} +function md5_ii($a, $b, $c, $d, $x, $s, $t) { + return md5_cmn($c ^ ($b | (~$d)), $a, $b, $x, $s, $t); +} + +/* Calculate the first round of the MD5 algorithm + */ + +function md5_oneround($s, $io) { + + $s = str_pad($s, 64, chr(0x00)); + + $x = array_fill(0, 16, 0); + + for($i = 0; $i < 64; $i++) + $x[$i >> 2] |= (($io ? 0x36 : 0x5c) ^ ord($s[$i])) << (($i % 4) * 8); + + $a = $olda = 1732584193; + $b = $oldb = -271733879; + $c = $oldc = -1732584194; + $d = $oldd = 271733878; + + $a = md5_ff($a, $b, $c, $d, $x[ 0], 7 , -680876936); + $d = md5_ff($d, $a, $b, $c, $x[ 1], 12, -389564586); + $c = md5_ff($c, $d, $a, $b, $x[ 2], 17, 606105819); + $b = md5_ff($b, $c, $d, $a, $x[ 3], 22, -1044525330); + $a = md5_ff($a, $b, $c, $d, $x[ 4], 7 , -176418897); + $d = md5_ff($d, $a, $b, $c, $x[ 5], 12, 1200080426); + $c = md5_ff($c, $d, $a, $b, $x[ 6], 17, -1473231341); + $b = md5_ff($b, $c, $d, $a, $x[ 7], 22, -45705983); + $a = md5_ff($a, $b, $c, $d, $x[ 8], 7 , 1770035416); + $d = md5_ff($d, $a, $b, $c, $x[ 9], 12, -1958414417); + $c = md5_ff($c, $d, $a, $b, $x[10], 17, -42063); + $b = md5_ff($b, $c, $d, $a, $x[11], 22, -1990404162); + $a = md5_ff($a, $b, $c, $d, $x[12], 7 , 1804603682); + $d = md5_ff($d, $a, $b, $c, $x[13], 12, -40341101); + $c = md5_ff($c, $d, $a, $b, $x[14], 17, -1502002290); + $b = md5_ff($b, $c, $d, $a, $x[15], 22, 1236535329); + + $a = md5_gg($a, $b, $c, $d, $x[ 1], 5 , -165796510); + $d = md5_gg($d, $a, $b, $c, $x[ 6], 9 , -1069501632); + $c = md5_gg($c, $d, $a, $b, $x[11], 14, 643717713); + $b = md5_gg($b, $c, $d, $a, $x[ 0], 20, -373897302); + $a = md5_gg($a, $b, $c, $d, $x[ 5], 5 , -701558691); + $d = md5_gg($d, $a, $b, $c, $x[10], 9 , 38016083); + $c = md5_gg($c, $d, $a, $b, $x[15], 14, -660478335); + $b = md5_gg($b, $c, $d, $a, $x[ 4], 20, -405537848); + $a = md5_gg($a, $b, $c, $d, $x[ 9], 5 , 568446438); + $d = md5_gg($d, $a, $b, $c, $x[14], 9 , -1019803690); + $c = md5_gg($c, $d, $a, $b, $x[ 3], 14, -187363961); + $b = md5_gg($b, $c, $d, $a, $x[ 8], 20, 1163531501); + $a = md5_gg($a, $b, $c, $d, $x[13], 5 , -1444681467); + $d = md5_gg($d, $a, $b, $c, $x[ 2], 9 , -51403784); + $c = md5_gg($c, $d, $a, $b, $x[ 7], 14, 1735328473); + $b = md5_gg($b, $c, $d, $a, $x[12], 20, -1926607734); + + $a = md5_hh($a, $b, $c, $d, $x[ 5], 4 , -378558); + $d = md5_hh($d, $a, $b, $c, $x[ 8], 11, -2022574463); + $c = md5_hh($c, $d, $a, $b, $x[11], 16, 1839030562); + $b = md5_hh($b, $c, $d, $a, $x[14], 23, -35309556); + $a = md5_hh($a, $b, $c, $d, $x[ 1], 4 , -1530992060); + $d = md5_hh($d, $a, $b, $c, $x[ 4], 11, 1272893353); + $c = md5_hh($c, $d, $a, $b, $x[ 7], 16, -155497632); + $b = md5_hh($b, $c, $d, $a, $x[10], 23, -1094730640); + $a = md5_hh($a, $b, $c, $d, $x[13], 4 , 681279174); + $d = md5_hh($d, $a, $b, $c, $x[ 0], 11, -358537222); + $c = md5_hh($c, $d, $a, $b, $x[ 3], 16, -722521979); + $b = md5_hh($b, $c, $d, $a, $x[ 6], 23, 76029189); + $a = md5_hh($a, $b, $c, $d, $x[ 9], 4 , -640364487); + $d = md5_hh($d, $a, $b, $c, $x[12], 11, -421815835); + $c = md5_hh($c, $d, $a, $b, $x[15], 16, 530742520); + $b = md5_hh($b, $c, $d, $a, $x[ 2], 23, -995338651); + + $a = md5_ii($a, $b, $c, $d, $x[ 0], 6 , -198630844); + $d = md5_ii($d, $a, $b, $c, $x[ 7], 10, 1126891415); + $c = md5_ii($c, $d, $a, $b, $x[14], 15, -1416354905); + $b = md5_ii($b, $c, $d, $a, $x[ 5], 21, -57434055); + $a = md5_ii($a, $b, $c, $d, $x[12], 6 , 1700485571); + $d = md5_ii($d, $a, $b, $c, $x[ 3], 10, -1894986606); + $c = md5_ii($c, $d, $a, $b, $x[10], 15, -1051523); + $b = md5_ii($b, $c, $d, $a, $x[ 1], 21, -2054922799); + $a = md5_ii($a, $b, $c, $d, $x[ 8], 6 , 1873313359); + $d = md5_ii($d, $a, $b, $c, $x[15], 10, -30611744); + $c = md5_ii($c, $d, $a, $b, $x[ 6], 15, -1560198380); + $b = md5_ii($b, $c, $d, $a, $x[13], 21, 1309151649); + $a = md5_ii($a, $b, $c, $d, $x[ 4], 6 , -145523070); + $d = md5_ii($d, $a, $b, $c, $x[11], 10, -1120210379); + $c = md5_ii($c, $d, $a, $b, $x[ 2], 15, 718787259); + $b = md5_ii($b, $c, $d, $a, $x[ 9], 21, -343485551); + + $a = safe_add($a, $olda); + $b = safe_add($b, $oldb); + $c = safe_add($c, $oldc); + $d = safe_add($d, $oldd); + + return rhex($a) . rhex($b) . rhex($c) . rhex($d); +} + +function dovecot_hmacmd5 ($s) { + if (strlen($s) > 64) $s=pack("H*", md5($s)); + return "{CRAM-MD5}" . md5_oneround($s, 0) . md5_oneround($s, 1); +} |