2013-11-01 00:15:14 +00:00
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<?php
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/**
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2016-07-11 09:58:15 +00:00
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* PrivateBin
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2013-11-01 00:15:14 +00:00
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*
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* a zero-knowledge paste bin
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*
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2016-07-11 09:58:15 +00:00
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* @link https://github.com/PrivateBin/PrivateBin
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2013-11-01 00:15:14 +00:00
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* @copyright 2012 Sébastien SAUVAGE (sebsauvage.net)
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2016-07-19 11:56:52 +00:00
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* @license https://www.opensource.org/licenses/zlib-license.php The zlib/libpng License
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2022-12-24 04:52:07 +00:00
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* @version 1.5.1
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2013-11-01 00:15:14 +00:00
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*/
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2016-12-12 17:43:23 +00:00
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2016-12-12 17:49:08 +00:00
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namespace PrivateBin\Persistence;
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2016-07-21 15:09:48 +00:00
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2021-06-08 20:01:29 +00:00
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use PrivateBin\Data\AbstractData;
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2016-07-21 15:09:48 +00:00
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2013-11-01 00:15:14 +00:00
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/**
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2016-08-09 09:54:42 +00:00
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* ServerSalt
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2013-11-01 00:15:14 +00:00
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*
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2016-07-11 09:58:15 +00:00
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* This is a random string which is unique to each PrivateBin installation.
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2013-11-01 00:15:14 +00:00
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* It is automatically created if not present.
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*
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* Salt is used:
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2016-07-11 09:58:15 +00:00
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* - to generate unique VizHash in discussions (which are not reproductible across PrivateBin servers)
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* - to generate unique deletion token (which are not re-usable across PrivateBin servers)
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2013-11-01 00:15:14 +00:00
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*/
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2016-08-09 09:54:42 +00:00
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class ServerSalt extends AbstractPersistence
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2013-11-01 00:15:14 +00:00
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{
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/**
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2015-08-16 13:55:31 +00:00
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* generated salt
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*
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2013-11-01 00:15:14 +00:00
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* @access private
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* @static
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* @var string
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*/
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private static $_salt = '';
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/**
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* generate a large random hexadecimal salt
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*
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* @access public
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* @static
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* @return string
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*/
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public static function generate()
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{
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2021-06-13 08:44:26 +00:00
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return bin2hex(random_bytes(256));
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2013-11-01 00:15:14 +00:00
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}
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/**
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* get server salt
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*
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* @access public
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* @static
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* @return string
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*/
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public static function get()
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{
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2016-07-26 06:19:35 +00:00
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if (strlen(self::$_salt)) {
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return self::$_salt;
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}
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2013-11-01 00:15:14 +00:00
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2021-06-08 20:01:29 +00:00
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$salt = self::$_store->getValue('salt');
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if ($salt) {
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self::$_salt = $salt;
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2015-08-27 19:41:21 +00:00
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} else {
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self::$_salt = self::generate();
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2021-06-16 03:32:45 +00:00
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if (!self::$_store->setValue(self::$_salt, 'salt')) {
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error_log('failed to store the server salt, delete tokens, traffic limiter and user icons won\'t work');
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}
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2013-11-01 00:15:14 +00:00
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}
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2015-08-27 19:41:21 +00:00
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return self::$_salt;
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}
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/**
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* set the path
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*
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* @access public
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* @static
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2021-06-08 20:01:29 +00:00
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* @param AbstractData $store
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2015-08-27 19:41:21 +00:00
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*/
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2021-06-08 20:01:29 +00:00
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public static function setStore(AbstractData $store)
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2015-08-27 19:41:21 +00:00
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{
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2016-07-26 06:19:35 +00:00
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self::$_salt = '';
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2021-06-08 20:01:29 +00:00
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parent::setStore($store);
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2013-11-01 00:15:14 +00:00
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}
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}
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