Verzeichnisstruktur phpBB-3.2.0
- Veröffentlicht
- 06.01.2017
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helper.php
001 <?php
002 /**
003 *
004 * This file is part of the phpBB Forum Software package.
005 *
006 * @copyright (c) phpBB Limited <https://www.phpbb.com>
007 * @license GNU General Public License, version 2 (GPL-2.0)
008 *
009 * For full copyright and license information, please see
010 * the docs/CREDITS.txt file.
011 *
012 */
013
014 namespace phpbb\passwords;
015
016 class helper
017 {
018 /**
019 * Get hash settings from combined hash
020 *
021 * @param string $hash Password hash of combined hash
022 *
023 * @return array An array containing the hash settings for the hash
024 * types in successive order as described by the combined
025 * password hash or an empty array if hash does not
026 * properly fit the combined hash format
027 */
028 public function get_combined_hash_settings($hash)
029 {
030 $output = array();
031
032 preg_match('#^\$([a-zA-Z0-9\\\]*?)\$#', $hash, $match);
033 $hash_settings = substr($hash, strpos($hash, $match[1]) + strlen($match[1]) + 1);
034 $matches = explode('\\', $match[1]);
035 foreach ($matches as $cur_type)
036 {
037 $dollar_position = strpos($hash_settings, '$');
038 $output[] = substr($hash_settings, 0, ($dollar_position != false) ? $dollar_position : strlen($hash_settings));
039 $hash_settings = substr($hash_settings, $dollar_position + 1);
040 }
041
042 return $output;
043 }
044
045 /**
046 * Combine hash prefixes, settings, and actual hash
047 *
048 * @param array $data Array containing the keys 'prefix' and 'settings'.
049 * It will hold the prefixes and settings
050 * @param string $type Data type of the supplied value
051 * @param string $value Value that should be put into the data array
052 *
053 * @return string|null Return complete combined hash if type is neither
054 * 'prefix' nor 'settings', nothing if it is
055 */
056 public function combine_hash_output(&$data, $type, $value)
057 {
058 if ($type == 'prefix')
059 {
060 $data[$type] .= ($data[$type] !== '$') ? '\\' : '';
061 $data[$type] .= str_replace('$', '', $value);
062 }
063 else if ($type == 'settings')
064 {
065 $data[$type] .= ($data[$type] !== '$') ? '$' : '';
066 $data[$type] .= $value;
067 }
068 else
069 {
070 // Return full hash
071 return $data['prefix'] . $data['settings'] . '$' . $value;
072 }
073 }
074
075 /**
076 * Rebuild hash for hashing functions
077 *
078 * @param string $prefix Hash prefix
079 * @param string $settings Hash settings
080 *
081 * @return string Rebuilt hash for hashing functions
082 */
083 public function rebuild_hash($prefix, $settings)
084 {
085 $rebuilt_hash = $prefix;
086 if (strpos($settings, '\\') !== false)
087 {
088 $settings = str_replace('\\', '$', $settings);
089 }
090 $rebuilt_hash .= $settings;
091 return $rebuilt_hash;
092 }
093
094 /**
095 * Obtain only the actual hash after the prefixes
096 *
097 * @param string $hash The full password hash
098 * @return string Actual hash (incl. settings)
099 */
100 public function obtain_hash_only($hash)
101 {
102 return substr($hash, strripos($hash, '$') + 1);
103 }
104 }
105