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| <?php | |
| /** | |
| * | |
| * This file is part of the phpBB Forum Software package. | |
| * | |
| * @copyright (c) phpBB Limited <https://www.phpbb.com> | |
| * @license GNU General Public License, version 2 (GPL-2.0) | |
| * | |
| * For full copyright and license information, please see | |
| * the docs/CREDITS.txt file. | |
| * | |
| */ | |
| namespace phpbb\passwords; | |
| class helper | |
| { | |
| /** | |
| * Get hash settings from combined hash | |
| * | |
| * @param string $hash Password hash of combined hash | |
| * | |
| * @return array An array containing the hash settings for the hash | |
| * types in successive order as described by the combined | |
| * password hash or an empty array if hash does not | |
| * properly fit the combined hash format | |
| */ | |
| public function get_combined_hash_settings($hash) | |
| { | |
| $output = array(); | |
| preg_match('#^\$([a-zA-Z0-9\\\]*?)\$#', $hash, $match); | |
| $hash_settings = substr($hash, strpos($hash, $match[1]) + strlen($match[1]) + 1); | |
| $matches = explode('\\', $match[1]); | |
| foreach ($matches as $cur_type) | |
| { | |
| $dollar_position = strpos($hash_settings, '$'); | |
| $output[] = substr($hash_settings, 0, ($dollar_position != false) ? $dollar_position : strlen($hash_settings)); | |
| $hash_settings = substr($hash_settings, $dollar_position + 1); | |
| } | |
| return $output; | |
| } | |
| /** | |
| * Combine hash prefixes, settings, and actual hash | |
| * | |
| * @param array $data Array containing the keys 'prefix' and 'settings'. | |
| * It will hold the prefixes and settings | |
| * @param string $type Data type of the supplied value | |
| * @param string $value Value that should be put into the data array | |
| * | |
| * @return string|null Return complete combined hash if type is neither | |
| * 'prefix' nor 'settings', nothing if it is | |
| */ | |
| public function combine_hash_output(&$data, $type, $value) | |
| { | |
| if ($type == 'prefix') | |
| { | |
| $data[$type] .= ($data[$type] !== '$') ? '\\' : ''; | |
| $data[$type] .= str_replace('$', '', $value); | |
| } | |
| else if ($type == 'settings') | |
| { | |
| $data[$type] .= ($data[$type] !== '$') ? '$' : ''; | |
| $data[$type] .= $value; | |
| } | |
| else | |
| { | |
| // Return full hash | |
| return $data['prefix'] . $data['settings'] . '$' . $value; | |
| } | |
| } | |
| /** | |
| * Rebuild hash for hashing functions | |
| * | |
| * @param string $prefix Hash prefix | |
| * @param string $settings Hash settings | |
| * | |
| * @return string Rebuilt hash for hashing functions | |
| */ | |
| public function rebuild_hash($prefix, $settings) | |
| { | |
| $rebuilt_hash = $prefix; | |
| if (strpos($settings, '\\') !== false) | |
| { | |
| $settings = str_replace('\\', '$', $settings); | |
| } | |
| $rebuilt_hash .= $settings; | |
| return $rebuilt_hash; | |
| } | |
| /** | |
| * Obtain only the actual hash after the prefixes | |
| * | |
| * @param string $hash The full password hash | |
| * @return string Actual hash (incl. settings) | |
| */ | |
| public function obtain_hash_only($hash) | |
| { | |
| return substr($hash, strripos($hash, '$') + 1); | |
| } | |
| } |