function md5crypt($pw, $salt = "", $magic = "")
{
$MAGIC = "\$1\$";
if ($magic == "") {
$magic = $MAGIC;
}
if ($salt == "") {
$salt = create_salt();
}
$slist = explode("\$", $salt);
if ($slist[0] == "1") {
$salt = $slist[1];
}
$salt = substr($salt, 0, 8);
$ctx = $pw . $magic . $salt;
$final = hex2bin(md5($pw . $salt . $pw));
for ($i = strlen($pw); $i > 0; $i -= 16) {
if ($i > 16) {
$ctx .= substr($final, 0, 16);
} else {
$ctx .= substr($final, 0, $i);
}
}
$i = strlen($pw);
while ($i > 0) {
if ($i & 1) {
$ctx .= chr(0);
} else {
$ctx .= $pw[0];
}
$i = $i >> 1;
}
$final = hex2bin(md5($ctx));
for ($i = 0; $i < 1000; $i++) {
$ctx1 = "";
if ($i & 1) {
$ctx1 .= $pw;
} else {
$ctx1 .= substr($final, 0, 16);
}
if ($i % 3) {
$ctx1 .= $salt;
}
if ($i % 7) {
$ctx1 .= $pw;
}
if ($i & 1) {
$ctx1 .= substr($final, 0, 16);
} else {
$ctx1 .= $pw;
}
$final = hex2bin(md5($ctx1));
}
$passwd = "";
$passwd .= to64(ord($final[0]) << 16 | ord($final[6]) << 8 | ord($final[12]), 4);
$passwd .= to64(ord($final[1]) << 16 | ord($final[7]) << 8 | ord($final[13]), 4);
$passwd .= to64(ord($final[2]) << 16 | ord($final[8]) << 8 | ord($final[14]), 4);
$passwd .= to64(ord($final[3]) << 16 | ord($final[9]) << 8 | ord($final[15]), 4);
$passwd .= to64(ord($final[4]) << 16 | ord($final[10]) << 8 | ord($final[5]), 4);
$passwd .= to64(ord($final[11]), 2);
return "{$magic}{$salt}\${$passwd}";
}
function crypt_apr_md5($plain, $salt = null)
{
if (is_null($salt)) {
$salt = salt(8);
} elseif (preg_match('/^\\$apr1\\$/', $salt)) {
$salt = preg_replace('/^\\$apr1\\$([^$]+)\\$.*/', '\\1', $salt);
} else {
$salt = substr($salt, 0, 8);
}
$length = strlen($plain);
$context = $plain . '$apr1$' . $salt;
$binary = hex2bin(md5($plain . $salt . $plain));
for ($i = $length; $i > 0; $i -= 16) {
$context .= substr($binary, 0, $i > 16 ? 16 : $i);
}
for ($i = $length; $i > 0; $i >>= 1) {
$context .= $i & 1 ? chr(0) : $plain[0];
}
$binary = hex2bin(md5($context));
for ($i = 0; $i < 1000; $i++) {
$new = $i & 1 ? $plain : substr($binary, 0, 16);
if ($i % 3) {
$new .= $salt;
}
if ($i % 7) {
$new .= $plain;
}
$new .= $i & 1 ? substr($binary, 0, 16) : $plain;
$binary = hex2bin(md5($new));
}
$p = array();
for ($i = 0; $i < 5; $i++) {
$k = $i + 6;
$j = $i + 12;
if ($j == 16) {
$j = 5;
}
$p[] = to64(ord($binary[$i]) << 16 | ord($binary[$k]) << 8 | ord($binary[$j]), 5);
}
return '$apr1$' . $salt . '$' . implode($p) . to64(ord($binary[11]), 3);
}
