c0ed2d6fed
Correct return test on `crypt()`. On failure `crypt()` returns a string that is shorter than 13 characters.
151 lines
2.8 KiB
PHP
151 lines
2.8 KiB
PHP
<?php
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/*
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* This file is part of PicoTools.
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*
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* (c) Frédéric Guillot http://fredericguillot.com
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace PicoTools\Crypto;
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/**
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* Generate a random token
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*
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* @return string Random token
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*/
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function token()
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{
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return hash('sha256', uniqid('', true).microtime());
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}
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/**
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* Generate a signature with a key
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*
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* @param string $data Data
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* @param string $key Key
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* @return string Signature
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*/
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function signature($data, $key)
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{
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return hash_hmac('sha256', $data, $key);
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}
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// Import of the PHP 5.5 password hashing method
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// https://github.com/ircmaxell/password_compat/blob/master/lib/password.php
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function password_verify($password, $hash)
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{
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$ret = crypt($password, $hash);
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if (! is_string($ret) || strlen($ret) != strlen($hash) || strlen($ret) < 13) {
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return false;
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}
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$status = 0;
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for ($i = 0; $i < strlen($ret); $i++) {
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$status |= (ord($ret[$i]) ^ ord($hash[$i]));
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}
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return $status === 0;
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}
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function password_hash($password)
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{
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$cost = 10;
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$required_salt_len = 22;
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$hash_format = sprintf("$2y$%02d$", $cost);
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$hash = $hash_format.password_salt($required_salt_len);
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$ret = crypt($password, $hash);
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if (! is_string($ret) || strlen($ret) < 13) {
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return false;
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}
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return $ret;
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}
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function password_salt($required_salt_len)
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{
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$buffer = '';
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$raw_length = (int) ($required_salt_len * 3 / 4 + 1);
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$buffer_valid = false;
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if (function_exists('mcrypt_create_iv')) {
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$buffer = mcrypt_create_iv($raw_length, MCRYPT_DEV_URANDOM);
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if ($buffer) {
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$buffer_valid = true;
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}
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}
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if (! $buffer_valid && function_exists('openssl_random_pseudo_bytes')) {
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$buffer = openssl_random_pseudo_bytes($raw_length);
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if ($buffer) {
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$buffer_valid = true;
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}
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}
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if (! $buffer_valid && file_exists('/dev/urandom')) {
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$f = @fopen('/dev/urandom', 'r');
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if ($f) {
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$read = strlen($buffer);
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while ($read < $raw_length) {
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$buffer .= fread($f, $raw_length - $read);
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$read = strlen($buffer);
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}
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fclose($f);
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if ($read >= $raw_length) {
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$buffer_valid = true;
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}
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}
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}
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if (! $buffer_valid || strlen($buffer) < $raw_length) {
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$bl = strlen($buffer);
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for ($i = 0; $i < $raw_length; $i++) {
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if ($i < $bl) {
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$buffer[$i] = $buffer[$i] ^ chr(mt_rand(0, 255));
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}
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else {
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$buffer .= chr(mt_rand(0, 255));
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}
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}
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}
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$salt = str_replace('+', '.', base64_encode($buffer));
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return substr($salt, 0, $required_salt_len);
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}
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