80 lines
2.6 KiB
PHP
80 lines
2.6 KiB
PHP
<?php
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/**
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* @author Lukas Reschke <lukas@owncloud.com>
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* @author Morris Jobke <hey@morrisjobke.de>
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*
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* @copyright Copyright (c) 2015, ownCloud, Inc.
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OCP\Security;
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/**
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* Class SecureRandom provides a layer around RandomLib to generate
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* secure random numbers.
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*
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* Usage:
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* $rng = new \OC\Security\SecureRandom();
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* $randomString = $rng->getMediumStrengthGenerator()->generateString(30);
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*
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* @package OCP\Security
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* @since 8.0.0
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*/
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interface ISecureRandom {
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/**
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* Flags for characters that can be used for <code>generate($length, $characters)</code>
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*/
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const CHAR_UPPER = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
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const CHAR_LOWER = 'abcdefghijklmnopqrstuvwxyz';
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const CHAR_DIGITS = '0123456789';
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const CHAR_SYMBOLS = '!\"#$%&\\\'()* +,-./:;<=>?@[\]^_`{|}~';
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/**
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* Convenience method to get a low strength random number generator.
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*
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* Low Strength should be used anywhere that random strings are needed
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* in a non-cryptographical setting. They are not strong enough to be
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* used as keys or salts. They are however useful for one-time use tokens.
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*
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* @return $this
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* @since 8.0.0
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*/
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public function getLowStrengthGenerator();
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/**
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* Convenience method to get a medium strength random number generator.
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*
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* Medium Strength should be used for most needs of a cryptographic nature.
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* They are strong enough to be used as keys and salts. However, they do
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* take some time and resources to generate, so they should not be over-used
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*
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* @return $this
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* @since 8.0.0
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*/
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public function getMediumStrengthGenerator();
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/**
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* Generate a random string of specified length.
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* @param int $length The length of the generated string
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* @param string $characters An optional list of characters to use if no characterlist is
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* specified all valid base64 characters are used.
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* @return string
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* @throws \Exception If the generator is not initialized.
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* @since 8.0.0
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*/
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public function generate($length, $characters = '');
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}
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