/dokuwiki-2011-05-25a/inc/PassHash.class.php
PHP | 379 lines | 184 code | 26 blank | 169 comment | 35 complexity | b0bce8118337e47809c24cfb9cae62d9 MD5 | raw file
Possible License(s): GPL-2.0
- <?php
- /**
- * Password Hashing Class
- *
- * This class implements various mechanisms used to hash passwords
- *
- * @author Andreas Gohr <andi@splitbrain.org>
- * @license LGPL2
- */
- class PassHash {
- /**
- * Verifies a cleartext password against a crypted hash
- *
- * The method and salt used for the crypted hash is determined automatically,
- * then the clear text password is crypted using the same method. If both hashs
- * match true is is returned else false
- *
- * @author Andreas Gohr <andi@splitbrain.org>
- * @return bool
- */
- function verify_hash($clear,$hash){
- $method='';
- $salt='';
- $magic='';
- //determine the used method and salt
- $len = strlen($hash);
- if(preg_match('/^\$1\$([^\$]{0,8})\$/',$hash,$m)){
- $method = 'smd5';
- $salt = $m[1];
- $magic = '1';
- }elseif(preg_match('/^\$apr1\$([^\$]{0,8})\$/',$hash,$m)){
- $method = 'apr1';
- $salt = $m[1];
- $magic = 'apr1';
- }elseif(preg_match('/^\$P\$(.{31})$/',$hash,$m)){
- $method = 'pmd5';
- $salt = $m[1];
- $magic = 'P';
- }elseif(preg_match('/^\$H\$(.{31})$/',$hash,$m)){
- $method = 'pmd5';
- $salt = $m[1];
- $magic = 'H';
- }elseif(preg_match('/^sha1\$(.{5})\$/',$hash,$m)){
- $method = 'djangosha1';
- $salt = $m[1];
- }elseif(preg_match('/^md5\$(.{5})\$/',$hash,$m)){
- $method = 'djangomd5';
- $salt = $m[1];
- }elseif(substr($hash,0,6) == '{SSHA}'){
- $method = 'ssha';
- $salt = substr(base64_decode(substr($hash, 6)),20);
- }elseif($len == 32){
- $method = 'md5';
- }elseif($len == 40){
- $method = 'sha1';
- }elseif($len == 16){
- $method = 'mysql';
- }elseif($len == 41 && $hash[0] == '*'){
- $method = 'my411';
- }elseif($len == 34){
- $method = 'kmd5';
- $salt = $hash;
- }else{
- $method = 'crypt';
- $salt = substr($hash,0,2);
- }
- //crypt and compare
- $call = 'hash_'.$method;
- if($this->$call($clear,$salt,$magic) === $hash){
- return true;
- }
- return false;
- }
- /**
- * Create a random salt
- *
- * @param int $len - The length of the salt
- */
- public function gen_salt($len=32){
- $salt = '';
- $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
- for($i=0;$i<$len,$i++;) $salt .= $chars[mt_rand(0,61)];
- return $salt;
- }
- /**
- * Initialize the passed variable with a salt if needed.
- *
- * If $salt is not null, the value is kept, but the lenght restriction is
- * applied.
- *
- * @param stringref $salt - The salt, pass null if you want one generated
- * @param int $len - The length of the salt
- */
- public function init_salt(&$salt,$len=32){
- if(is_null($salt)) $salt = $this->gen_salt($len);
- if(strlen($salt) > $len) $salt = substr($salt,0,$len);
- }
- // Password hashing methods follow below
- /**
- * Password hashing method 'smd5'
- *
- * Uses salted MD5 hashs. Salt is 8 bytes long.
- *
- * The same mechanism is used by Apache's 'apr1' method. This will
- * fallback to a implementation in pure PHP if MD5 support is not
- * available in crypt()
- *
- * @author Andreas Gohr <andi@splitbrain.org>
- * @author <mikey_nich at hotmail dot com>
- * @link http://de.php.net/manual/en/function.crypt.php#73619
- * @param string $clear - the clear text to hash
- * @param string $salt - the salt to use, null for random
- * @param string $magic - the hash identifier (apr1 or 1)
- * @returns string - hashed password
- */
- public function hash_smd5($clear, $salt=null){
- $this->init_salt($salt,8);
- if(defined('CRYPT_MD5') && CRYPT_MD5){
- return crypt($clear,'$1$'.$salt.'$');
- }else{
- // Fall back to PHP-only implementation
- return $this->hash_apr1($clear, $salt, '1');
- }
- }
- /**
- * Password hashing method 'apr1'
- *
- * Uses salted MD5 hashs. Salt is 8 bytes long.
- *
- * This is basically the same as smd1 above, but as used by Apache.
- *
- * @author <mikey_nich at hotmail dot com>
- * @link http://de.php.net/manual/en/function.crypt.php#73619
- * @param string $clear - the clear text to hash
- * @param string $salt - the salt to use, null for random
- * @param string $magic - the hash identifier (apr1 or 1)
- * @returns string - hashed password
- */
- public function hash_apr1($clear, $salt=null, $magic='apr1'){
- $this->init_salt($salt,8);
- $len = strlen($clear);
- $text = $clear.'$'.$magic.'$'.$salt;
- $bin = pack("H32", md5($clear.$salt.$clear));
- for($i = $len; $i > 0; $i -= 16) {
- $text .= substr($bin, 0, min(16, $i));
- }
- for($i = $len; $i > 0; $i >>= 1) {
- $text .= ($i & 1) ? chr(0) : $clear{0};
- }
- $bin = pack("H32", md5($text));
- for($i = 0; $i < 1000; $i++) {
- $new = ($i & 1) ? $clear : $bin;
- if ($i % 3) $new .= $salt;
- if ($i % 7) $new .= $clear;
- $new .= ($i & 1) ? $bin : $clear;
- $bin = pack("H32", md5($new));
- }
- $tmp = '';
- for ($i = 0; $i < 5; $i++) {
- $k = $i + 6;
- $j = $i + 12;
- if ($j == 16) $j = 5;
- $tmp = $bin[$i].$bin[$k].$bin[$j].$tmp;
- }
- $tmp = chr(0).chr(0).$bin[11].$tmp;
- $tmp = strtr(strrev(substr(base64_encode($tmp), 2)),
- "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",
- "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz");
- return '$'.$magic.'$'.$salt.'$'.$tmp;
- }
- /**
- * Password hashing method 'md5'
- *
- * Uses MD5 hashs.
- *
- * @param string $clear - the clear text to hash
- * @returns string - hashed password
- */
- public function hash_md5($clear){
- return md5($clear);
- }
- /**
- * Password hashing method 'sha1'
- *
- * Uses SHA1 hashs.
- *
- * @param string $clear - the clear text to hash
- * @returns string - hashed password
- */
- public function hash_sha1($clear){
- return sha1($clear);
- }
- /**
- * Password hashing method 'ssha' as used by LDAP
- *
- * Uses salted SHA1 hashs. Salt is 4 bytes long.
- *
- * @param string $clear - the clear text to hash
- * @param string $salt - the salt to use, null for random
- * @returns string - hashed password
- */
- public function hash_ssha($clear, $salt=null){
- $this->init_salt($salt,4);
- return '{SSHA}'.base64_encode(pack("H*", sha1($clear.$salt)).$salt);
- }
- /**
- * Password hashing method 'crypt'
- *
- * Uses salted crypt hashs. Salt is 2 bytes long.
- *
- * @param string $clear - the clear text to hash
- * @param string $salt - the salt to use, null for random
- * @returns string - hashed password
- */
- public function hash_crypt($clear, $salt=null){
- $this->init_salt($salt,2);
- return crypt($clear,$salt);
- }
- /**
- * Password hashing method 'mysql'
- *
- * This method was used by old MySQL systems
- *
- * @link http://www.php.net/mysql
- * @author <soren at byu dot edu>
- * @param string $clear - the clear text to hash
- * @returns string - hashed password
- */
- public function hash_mysql($clear){
- $nr=0x50305735;
- $nr2=0x12345671;
- $add=7;
- $charArr = preg_split("//", $clear);
- foreach ($charArr as $char) {
- if (($char == '') || ($char == ' ') || ($char == '\t')) continue;
- $charVal = ord($char);
- $nr ^= ((($nr & 63) + $add) * $charVal) + ($nr << 8);
- $nr2 += ($nr2 << 8) ^ $nr;
- $add += $charVal;
- }
- return sprintf("%08x%08x", ($nr & 0x7fffffff), ($nr2 & 0x7fffffff));
- }
- /**
- * Password hashing method 'my411'
- *
- * Uses SHA1 hashs. This method is used by MySQL 4.11 and above
- *
- * @param string $clear - the clear text to hash
- * @returns string - hashed password
- */
- public function hash_my411($clear){
- return '*'.sha1(pack("H*", sha1($clear)));
- }
- /**
- * Password hashing method 'kmd5'
- *
- * Uses salted MD5 hashs.
- *
- * Salt is 2 bytes long, but stored at position 16, so you need to pass at
- * least 18 bytes. You can pass the crypted hash as salt.
- *
- * @param string $clear - the clear text to hash
- * @param string $salt - the salt to use, null for random
- * @returns string - hashed password
- */
- public function hash_kmd5($clear, $salt=null){
- $this->init_salt($salt);
- $key = substr($salt, 16, 2);
- $hash1 = strtolower(md5($key . md5($clear)));
- $hash2 = substr($hash1, 0, 16) . $key . substr($hash1, 16);
- return $hash2;
- }
- /**
- * Password hashing method 'pmd5'
- *
- * Uses salted MD5 hashs. Salt is 1+8 bytes long, 1st byte is the
- * iteration count.
- *
- * @param string $clear - the clear text to hash
- * @param string $salt - the salt to use, null for random
- * @param string $magic - the hash identifier (P or H)
- * @returns string - hashed password
- */
- public function hash_pmd5($clear, $salt=null, $magic='P'){
- $this->init_salt($salt);
- $itoa64 = './0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
- $iterc = $salt[0]; // pos 0 of salt is iteration count
- $iter = strpos($itoa64,$iterc);
- $iter = 1 << $iter;
- $salt = substr($salt,1,8);
- // iterate
- $hash = md5($salt . $clear, true);
- do {
- $hash = md5($hash . $clear, true);
- } while (--$iter);
- // encode
- $output = '';
- $count = 16;
- $i = 0;
- do {
- $value = ord($hash[$i++]);
- $output .= $itoa64[$value & 0x3f];
- if ($i < $count)
- $value |= ord($hash[$i]) << 8;
- $output .= $itoa64[($value >> 6) & 0x3f];
- if ($i++ >= $count)
- break;
- if ($i < $count)
- $value |= ord($hash[$i]) << 16;
- $output .= $itoa64[($value >> 12) & 0x3f];
- if ($i++ >= $count)
- break;
- $output .= $itoa64[($value >> 18) & 0x3f];
- } while ($i < $count);
- return '$'.$magic.'$'.$iterc.$salt.$output;
- }
- /**
- * Alias for hash_pmd5
- */
- public function hash_hmd5($clear, $salt=null, $magic='H'){
- return $this->hash_pmd5($clear, $salt, $magic);
- }
- /**
- * Password hashing method 'djangosha1'
- *
- * Uses salted SHA1 hashs. Salt is 5 bytes long.
- * This is used by the Django Python framework
- *
- * @link http://docs.djangoproject.com/en/dev/topics/auth/#passwords
- * @param string $clear - the clear text to hash
- * @param string $salt - the salt to use, null for random
- * @returns string - hashed password
- */
- public function hash_djangosha1($clear, $salt=null){
- $this->init_salt($salt,5);
- return 'sha1$'.$salt.'$'.sha1($salt.$clear);
- }
- /**
- * Password hashing method 'djangomd5'
- *
- * Uses salted MD5 hashs. Salt is 5 bytes long.
- * This is used by the Django Python framework
- *
- * @link http://docs.djangoproject.com/en/dev/topics/auth/#passwords
- * @param string $clear - the clear text to hash
- * @param string $salt - the salt to use, null for random
- * @returns string - hashed password
- */
- public function hash_djangomd5($clear, $salt=null){
- $this->init_salt($salt,5);
- return 'md5$'.$salt.'$'.md5($salt.$clear);
- }
- }