Código PHP:
function rhex($num) {
$hex_chr = "0123456789abcdef";
$str = "";
for($j = 0; $j <= 3; $j++)
$str .= substr($hex_chr, ($num >> ($j * 8 + 4)) & 0x0F, 1) . substr($hex_chr, ($num >> ($j * 8)) & 0x0F, 1);
return $str;
}
function str2blks_MD5($str) {
$nblk = ((strlen($str) + 8) >> 6) + 1;
for($i = 0; $i < $nblk * 16; $i++) $blks[$i] = 0;
for($i = 0; $i < strlen($str); $i++)
$blks[$i >> 2] |= ord(substr($str, $i, 1)) << (($i % 4) * 8);
$blks[$i >> 2] |= 0x80 << (($i % 4) * 8);
$blks[$nblk * 16 - 2] = strlen($str) * 8;
return $blks;
}
function add($x, $y) {
$lsw = ($x & 0xFFFF) + ($y & 0xFFFF);
$msw = ($x >> 16) + ($y >> 16) + ($lsw >> 16);
return ($msw << 16) | ($lsw & 0xFFFF);
}
function rol($num, $cnt) {
return ($num << $cnt) | zeroFill($num, 32 - $cnt);
}
function zeroFill($a, $b) {
$bin = decbin($a);
if (strlen($bin) < $b) $bin = 0;
else $bin = substr($bin, 0, strlen($bin) - $b);
for ($i=0; $i < $b; $i++) {
$bin = "0".$bin;
}
return bindec($bin);
}
function cmn($q, $a, $b, $x, $s, $t) {
return add(rol(add(add($a, $q), add($x, $t)), $s), $b);
}
function ff($a, $b, $c, $d, $x, $s, $t) {
return cmn(($b & $c) | ((~$b) & $d), $a, $b, $x, $s, $t);
}
function gg($a, $b, $c, $d, $x, $s, $t) {
return cmn(($b & $d) | ($c & (~$d)), $a, $b, $x, $s, $t);
}
function hh($a, $b, $c, $d, $x, $s, $t) {
return cmn($b ^ $c ^ $d, $a, $b, $x, $s, $t);
}
function ii($a, $b, $c, $d, $x, $s, $t) {
return cmn($c ^ ($b | (~$d)), $a, $b, $x, $s, $t);
}
function md5p($str) {
$x = str2blks_MD5($str);
$a = 1732584193;
$b = -271733879;
$c = -1732584194;
$d = 271733878;
for($i = 0; $i < sizeof($x); $i += 16) {
$olda = $a;
$oldb = $b;
$oldc = $c;
$oldd = $d;
$a = ff($a, $b, $c, $d, $x[$i+ 0], 7 , -680876936);
$d = ff($d, $a, $b, $c, $x[$i+ 1], 12, -389564586);
$c = ff($c, $d, $a, $b, $x[$i+ 2], 17, 606105819);
$b = ff($b, $c, $d, $a, $x[$i+ 3], 22, -1044525330);
$a = ff($a, $b, $c, $d, $x[$i+ 4], 7 , -176418897);
$d = ff($d, $a, $b, $c, $x[$i+ 5], 12, 1200080426);
$c = ff($c, $d, $a, $b, $x[$i+ 6], 17, -1473231341);
$b = ff($b, $c, $d, $a, $x[$i+ 7], 22, -45705983);
$a = ff($a, $b, $c, $d, $x[$i+ 8], 7 , 1770035416);
$d = ff($d, $a, $b, $c, $x[$i+ 9], 12, -1958414417);
$c = ff($c, $d, $a, $b, $x[$i+10], 17, -42063);
$b = ff($b, $c, $d, $a, $x[$i+11], 22, -1990404162);
$a = ff($a, $b, $c, $d, $x[$i+12], 7 , 1804603682);
$d = ff($d, $a, $b, $c, $x[$i+13], 12, -40341101);
$c = ff($c, $d, $a, $b, $x[$i+14], 17, -1502002290);
$b = ff($b, $c, $d, $a, $x[$i+15], 22, 1236535329);
$a = gg($a, $b, $c, $d, $x[$i+ 1], 5 , -165796510);
$d = gg($d, $a, $b, $c, $x[$i+ 6], 9 , -1069501632);
$c = gg($c, $d, $a, $b, $x[$i+11], 14, 643717713);
$b = gg($b, $c, $d, $a, $x[$i+ 0], 20, -373897302);
$a = gg($a, $b, $c, $d, $x[$i+ 5], 5 , -701558691);
$d = gg($d, $a, $b, $c, $x[$i+10], 9 , 38016083);
$c = gg($c, $d, $a, $b, $x[$i+15], 14, -660478335);
$b = gg($b, $c, $d, $a, $x[$i+ 4], 20, -405537848);
$a = gg($a, $b, $c, $d, $x[$i+ 9], 5 , 568446438);
$d = gg($d, $a, $b, $c, $x[$i+14], 9 , -1019803690);
$c = gg($c, $d, $a, $b, $x[$i+ 3], 14, -187363961);
$b = gg($b, $c, $d, $a, $x[$i+ 8], 20, 1163531501);
$a = gg($a, $b, $c, $d, $x[$i+13], 5 , -1444681467);
$d = gg($d, $a, $b, $c, $x[$i+ 2], 9 , -51403784);
$c = gg($c, $d, $a, $b, $x[$i+ 7], 14, 1735328473);
$b = gg($b, $c, $d, $a, $x[$i+12], 20, -1926607734);
$a = hh($a, $b, $c, $d, $x[$i+ 5], 4 , -378558);
$d = hh($d, $a, $b, $c, $x[$i+ 8], 11, -2022574463);
$c = hh($c, $d, $a, $b, $x[$i+11], 16, 1839030562);
$b = hh($b, $c, $d, $a, $x[$i+14], 23, -35309556);
$a = hh($a, $b, $c, $d, $x[$i+ 1], 4 , -1530992060);
$d = hh($d, $a, $b, $c, $x[$i+ 4], 11, 1272893353);
$c = hh($c, $d, $a, $b, $x[$i+ 7], 16, -155497632);
$b = hh($b, $c, $d, $a, $x[$i+10], 23, -1094730640);
$a = hh($a, $b, $c, $d, $x[$i+13], 4 , 681279174);
$d = hh($d, $a, $b, $c, $x[$i+ 0], 11, -358537222);
$c = hh($c, $d, $a, $b, $x[$i+ 3], 16, -722521979);
$b = hh($b, $c, $d, $a, $x[$i+ 6], 23, 76029189);
$a = hh($a, $b, $c, $d, $x[$i+ 9], 4 , -640364487);
$d = hh($d, $a, $b, $c, $x[$i+12], 11, -421815835);
$c = hh($c, $d, $a, $b, $x[$i+15], 16, 530742520);
$b = hh($b, $c, $d, $a, $x[$i+ 2], 23, -995338651);
$a = ii($a, $b, $c, $d, $x[$i+ 0], 6 , -198630844);
$d = ii($d, $a, $b, $c, $x[$i+ 7], 10, 1126891415);
$c = ii($c, $d, $a, $b, $x[$i+14], 15, -1416354905);
$b = ii($b, $c, $d, $a, $x[$i+ 5], 21, -57434055);
$a = ii($a, $b, $c, $d, $x[$i+12], 6 , 1700485571);
$d = ii($d, $a, $b, $c, $x[$i+ 3], 10, -1894986606);
$c = ii($c, $d, $a, $b, $x[$i+10], 15, -1051523);
$b = ii($b, $c, $d, $a, $x[$i+ 1], 21, -2054922799);
$a = ii($a, $b, $c, $d, $x[$i+ 8], 6 , 1873313359);
$d = ii($d, $a, $b, $c, $x[$i+15], 10, -30611744);
$c = ii($c, $d, $a, $b, $x[$i+ 6], 15, -1560198380);
$b = ii($b, $c, $d, $a, $x[$i+13], 21, 1309151649);
$a = ii($a, $b, $c, $d, $x[$i+ 4], 6 , -145523070);
$d = ii($d, $a, $b, $c, $x[$i+11], 10, -1120210379);
$c = ii($c, $d, $a, $b, $x[$i+ 2], 15, 718787259);
$b = ii($b, $c, $d, $a, $x[$i+ 9], 21, -343485551);
$a = add($a, $olda);
$b = add($b, $oldb);
$c = add($c, $oldc);
$d = add($d, $oldd);
}
return rhex($a) . rhex($b) . rhex($c) . rhex($d);
}
echo md5p('word');//Generado manualmente
echo "\r\n<br />".md5('word');//Generado con PHP