| 0,0 → 1,80 |
|---|
| <?php |
| |
| define('PASSWORD_STD_DES', 'std_des'); |
| define('PASSWORD_EXT_DES', 'ext_des'); |
| define('PASSWORD_MD5', 'md5'); |
| define('PASSWORD_BLOWFISH', 'blowfish'); |
| define('PASSWORD_SHA256', 'sha256'); |
| define('PASSWORD_SHA512', 'sha512'); |
| |
| function des_compat_salt($salt_len) { |
| $characters = './0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'; |
| $salt = ''; |
| for ($i=0; $i<$salt_len; $i++) { |
| $salt .= $characters[rand(0, strlen($characters)-1)]; // TODO: use rand() to make the RND cryptographical secure |
| } |
| return $salt; |
| } |
| |
| function base64_int_encode($num) { |
| // https://stackoverflow.com/questions/15534982/which-iteration-rules-apply-on-crypt-using-crypt-ext-des |
| $alphabet_raw='./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'; |
| $alphabet=str_split($alphabet_raw); |
| $arr=array(); |
| $base=sizeof($alphabet); |
| while($num) { |
| $rem=$num % $base; |
| $num=(int)($num / $base); |
| $arr[]=$alphabet[$rem]; |
| } |
| $string=implode($arr); |
| return str_pad($string, 4, '.', STR_PAD_RIGHT); |
| } |
| |
| /** This function extends password_hash() with the algorithms supported by crypt(). |
| * The result can be verified using password_verify(). |
| * @param string $password to be hashed |
| * @param mixed $algo algorithm |
| * @param array $options options for the hashing algorithm |
| * @return string Crypt compatible password hash |
| */ |
| function password_hash_ex($password, $algo, $options=array()) { |
| if (($algo === PASSWORD_STD_DES) && defined('CRYPT_STD_DES')) { |
| // Standard DES-based hash with a two character salt from the alphabet "./0-9A-Za-z". Using invalid characters in the salt will cause crypt() to fail. |
| $salt = des_compat_salt(2); |
| return crypt($password, $salt); |
| } else if (($algo === PASSWORD_EXT_DES) && defined('CRYPT_EXT_DES')) { |
| // Extended DES-based hash. The "salt" is a 9-character string consisting of an underscore followed by 4 characters of iteration count and 4 characters of salt. Each of these 4-character strings encode 24 bits, least significant character first. The values 0 to 63 are encoded as ./0-9A-Za-z. Using invalid characters in the salt will cause crypt() to fail. |
| $iterations = isset($options['iterations']) ? $options['iterations'] : 725; |
| $salt = '_' . base64_int_encode($iterations) . des_compat_salt(4); |
| return crypt($password, $salt); |
| } else if (($algo === PASSWORD_MD5) && defined('CRYPT_MD5')) { |
| // MD5 hashing with a twelve character salt starting with $1$ |
| $salt = '$1$'.des_compat_salt(12).'$'; |
| return crypt($password, $salt); |
| } else if (($algo === PASSWORD_BLOWFISH) && defined('CRYPT_BLOWFISH')) { |
| // Blowfish hashing with a salt as follows: "$2a$", "$2x$" or "$2y$", a two digit cost parameter, "$", and 22 characters from the alphabet "./0-9A-Za-z". Using characters outside of this range in the salt will cause crypt() to return a zero-length string. The two digit cost parameter is the base-2 logarithm of the iteration count for the underlying Blowfish-based hashing algorithm and must be in range 04-31, values outside this range will cause crypt() to fail. "$2x$" hashes are potentially weak; "$2a$" hashes are compatible and mitigate this weakness. For new hashes, "$2y$" should be used. |
| $algo = '$2y$'; // most secure |
| $cost = isset($options['cost']) ? $options['cost'] : 10; |
| $salt = $algo.str_pad($cost,2,'0',STR_PAD_LEFT).'$'.des_compat_salt(22).'$'; |
| return crypt($password, $salt); |
| } else if (($algo === PASSWORD_SHA256) && defined('CRYPT_SHA256')) { |
| // SHA-256 hash with a sixteen character salt prefixed with $5$. If the salt string starts with 'rounds=<N>$', the numeric value of N is used to indicate how many times the hashing loop should be executed, much like the cost parameter on Blowfish. The default number of rounds is 5000, there is a minimum of 1000 and a maximum of 999,999,999. Any selection of N outside this range will be truncated to the nearest limit. |
| $algo = '$5$'; |
| $rounds = isset($options['rounds']) ? $options['rounds'] : 5000; |
| $salt = $algo.'rounds='.$rounds.'$'.des_compat_salt(16).'$'; |
| return crypt($password, $salt); |
| } else if (($algo === PASSWORD_SHA512) && defined('CRYPT_SHA512')) { |
| // SHA-512 hash with a sixteen character salt prefixed with $6$. If the salt string starts with 'rounds=<N>$', the numeric value of N is used to indicate how many times the hashing loop should be executed, much like the cost parameter on Blowfish. The default number of rounds is 5000, there is a minimum of 1000 and a maximum of 999,999,999. Any selection of N outside this range will be truncated to the nearest limit. |
| $algo = '$6$'; |
| $rounds = isset($options['rounds']) ? $options['rounds'] : 5000; |
| $salt = $algo.'rounds='.$rounds.'$'.des_compat_salt(16).'$'; |
| return crypt($password, $salt); |
| } else { |
| // $algo === PASSWORD_DEFAULT |
| // $algo === PASSWORD_BCRYPT |
| // $algo === PASSWORD_ARGON2I |
| // $algo === PASSWORD_ARGON2ID |
| return password_hash($password, $algo, $options); |
| } |
| } |