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<?php /** * A Compatibility library with PHP 5.5's simplified password hashing API. * * @author Anthony Ferrara <ircmaxell@php.net> * @license http://www.opensource.org/licenses/mit-license.html MIT License * @copyright 2012 The Authors */ if (!defined('PASSWORD_DEFAULT')) { define('PASSWORD_BCRYPT', 1); define('PASSWORD_DEFAULT', PASSWORD_BCRYPT); /** * Hash the password using the specified algorithm * * @param string $password The password to hash * @param int $algo The algorithm to use (Defined by PASSWORD_* constants) * @param array $options The options for the algorithm to use * * @return string|false The hashed password, or false on error. */ function password_hash($password, $algo, array $options = array()) { if (!function_exists('crypt')) { trigger_error("Crypt must be loaded for password_hash to function", E_USER_WARNING); return null; } if (!is_string($password)) { trigger_error("password_hash(): Password must be a string", E_USER_WARNING); return null; } if (!is_int($algo)) { trigger_error("password_hash() expects parameter 2 to be long, " . gettype($algo) . " given", E_USER_WARNING); return null; } $resultLength = 0; switch ($algo) { case PASSWORD_BCRYPT: // Note that this is a C constant, but not exposed to PHP, so we don't define it here. $cost = 10; if (isset($options['cost'])) { $cost = $options['cost']; if ($cost < 4 || $cost > 31) { trigger_error(sprintf("password_hash(): Invalid bcrypt cost parameter specified: %d", $cost), E_USER_WARNING); return null; } } // The length of salt to generate $raw_salt_len = 16; // The length required in the final serialization $required_salt_len = 22; $hash_format = sprintf("$2y$%02d$", $cost); // The expected length of the final crypt() output $resultLength = 60; break; default: trigger_error(sprintf("password_hash(): Unknown password hashing algorithm: %s", $algo), E_USER_WARNING); return null; } $salt_requires_encoding = false; if (isset($options['salt'])) { switch (gettype($options['salt'])) { case 'NULL': case 'boolean': case 'integer': case 'double': case 'string': $salt = (string) $options['salt']; break; case 'object': if (method_exists($options['salt'], '__tostring')) { $salt = (string) $options['salt']; break; } case 'array': case 'resource': default: trigger_error('password_hash(): Non-string salt parameter supplied', E_USER_WARNING); return null; } if (PasswordCompat\binary\_strlen($salt) < $required_salt_len) { trigger_error(sprintf("password_hash(): Provided salt is too short: %d expecting %d", PasswordCompat\binary\_strlen($salt), $required_salt_len), E_USER_WARNING); return null; } elseif (0 == preg_match('#^[a-zA-Z0-9./]+$#D', $salt)) { $salt_requires_encoding = true; } } else { $buffer = ''; $buffer_valid = false; if (function_exists('mcrypt_create_iv') && !defined('PHALANGER')) { $buffer = mcrypt_create_iv($raw_salt_len, MCRYPT_DEV_URANDOM); if ($buffer) { $buffer_valid = true; } } if (!$buffer_valid && function_exists('openssl_random_pseudo_bytes')) { $buffer = openssl_random_pseudo_bytes($raw_salt_len); if ($buffer) { $buffer_valid = true; } } if (!$buffer_valid && @is_readable('/dev/urandom')) { $f = fopen('/dev/urandom', 'r'); $read = PasswordCompat\binary\_strlen($buffer); while ($read < $raw_salt_len) { $buffer .= fread($f, $raw_salt_len - $read); $read = PasswordCompat\binary\_strlen($buffer); } fclose($f); if ($read >= $raw_salt_len) { $buffer_valid = true; } } if (!$buffer_valid || PasswordCompat\binary\_strlen($buffer) < $raw_salt_len) { $bl = PasswordCompat\binary\_strlen($buffer); for ($i = 0; $i < $raw_salt_len; $i++) { if ($i < $bl) { $buffer[$i] = $buffer[$i] ^ chr(mt_rand(0, 255)); } else { $buffer .= chr(mt_rand(0, 255)); } } } $salt = $buffer; $salt_requires_encoding = true; } if ($salt_requires_encoding) { // encode string with the Base64 variant used by crypt $base64_digits = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'; $bcrypt64_digits = './ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'; $base64_string = base64_encode($salt); $salt = strtr(rtrim($base64_string, '='), $base64_digits, $bcrypt64_digits); } $salt = PasswordCompat\binary\_substr($salt, 0, $required_salt_len); $hash = $hash_format . $salt; $ret = crypt($password, $hash); if (!is_string($ret) || PasswordCompat\binary\_strlen($ret) != $resultLength) { return false; } return $ret; } /** * Get information about the password hash. Returns an array of the information * that was used to generate the password hash. * * array( * 'algo' => 1, * 'algoName' => 'bcrypt', * 'options' => array( * 'cost' => 10, * ), * ) * * @param string $hash The password hash to extract info from * * @return array The array of information about the hash. */ function password_get_info($hash) { $return = array( 'algo' => 0, 'algoName' => 'unknown', 'options' => array(), ); if (PasswordCompat\binary\_substr($hash, 0, 4) == '$2y$' && PasswordCompat\binary\_strlen($hash) == 60) { $return['algo'] = PASSWORD_BCRYPT; $return['algoName'] = 'bcrypt'; list($cost) = sscanf($hash, "$2y$%d$"); $return['options']['cost'] = $cost; } return $return; } /** * Determine if the password hash needs to be rehashed according to the options provided * * If the answer is true, after validating the password using password_verify, rehash it. * * @param string $hash The hash to test * @param int $algo The algorithm used for new password hashes * @param array $options The options array passed to password_hash * * @return boolean True if the password needs to be rehashed. */ function password_needs_rehash($hash, $algo, array $options = array()) { $info = password_get_info($hash); if ($info['algo'] != $algo) { return true; } switch ($algo) { case PASSWORD_BCRYPT: $cost = isset($options['cost']) ? $options['cost'] : 10; if ($cost != $info['options']['cost']) { return true; } break; } return false; } /** * Verify a password against a hash using a timing attack resistant approach * * @param string $password The password to verify * @param string $hash The hash to verify against * * @return boolean If the password matches the hash */ function password_verify($password, $hash) { if (!function_exists('crypt')) { trigger_error("Crypt must be loaded for password_verify to function", E_USER_WARNING); return false; } $ret = crypt($password, $hash); if (!is_string($ret) || PasswordCompat\binary\_strlen($ret) != PasswordCompat\binary\_strlen($hash) || PasswordCompat\binary\_strlen($ret) <= 13) { return false; } $status = 0; for ($i = 0; $i < PasswordCompat\binary\_strlen($ret); $i++) { $status |= (ord($ret[$i]) ^ ord($hash[$i])); } return $status === 0; } } namespace PasswordCompat\binary { /** * Count the number of bytes in a string * * We cannot simply use strlen() for this, because it might be overwritten by the mbstring extension. * In this case, strlen() will count the number of *characters* based on the internal encoding. A * sequence of bytes might be regarded as a single multibyte character. * * @param string $binary_string The input string * * @internal * @return int The number of bytes */ function _strlen($binary_string) { if (function_exists('mb_strlen')) { return mb_strlen($binary_string, '8bit'); } return strlen($binary_string); } /** * Get a substring based on byte limits * * @see _strlen() * * @param string $binary_string The input string * @param int $start * @param int $length * * @internal * @return string The substring */ function _substr($binary_string, $start, $length) { if (function_exists('mb_substr')) { return mb_substr($binary_string, $start, $length, '8bit'); } return substr($binary_string, $start, $length); } } echo password_hash('hola',PASSWORD_BCRYPT);
Output for 5.3.0 - 5.4.27
Fatal error: Namespace declaration statement has to be the very first statement in the script in /in/5vNVg on line 240
Process exited with code 255.
Output for 5.1.0 - 5.2.17
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/5vNVg on line 84 Parse error: syntax error, unexpected T_STRING in /in/5vNVg on line 84
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/5vNVg on line 26
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_ARRAY, expecting '&' or T_VARIABLE or T_CONST in /in/5vNVg on line 26
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE or T_CONST in /in/5vNVg on line 26
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'&'' or `T_VARIABLE' or `T_CONST' in /in/5vNVg on line 26
Process exited with code 255.