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<?php |
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declare(strict_types=1); |
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/** |
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* @copyright Copyright (c) 2016, ownCloud, Inc. |
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* |
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* @author Lukas Reschke <[email protected]> |
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* @author Morris Jobke <[email protected]> |
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* |
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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 OC\Security; |
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use OCP\Security\ISecureRandom; |
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/** |
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* Class SecureRandom provides a wrapper around the random_int function to generate |
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* secure random strings. For PHP 7 the native CSPRNG is used, older versions do |
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* use a fallback. |
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* |
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* Usage: |
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* \OC::$server->getSecureRandom()->generate(10); |
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* @package OC\Security |
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*/ |
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class SecureRandom implements ISecureRandom { |
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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 character list is |
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* specified all valid base64 characters are used. |
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* @return string |
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*/ |
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public function generate(int $length, |
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string $characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'): string { |
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$maxCharIndex = \strlen($characters) - 1; |
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$randomString = ''; |
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while($length > 0) { |
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$randomNumber = \random_int(0, $maxCharIndex); |
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$randomString .= $characters[$randomNumber]; |
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$length--; |
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} |
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return $randomString; |
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} |
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} |
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nextcloud /
server
