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<?php
declare(strict_types=1);
/**
* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
* SPDX-License-Identifier: AGPL-3.0-only
*/
namespace OCP\Security;
/**
* Class SecureRandom provides a wrapper around the random_int function to generate
* secure random strings. For PHP 7 the native CSPRNG is used, older versions do
* use a fallback.
*
* Usage:
* \OC::$server->get(ISecureRandom::class)->generate(10);
*
* @since 8.0.0
*/
interface ISecureRandom {
/**
* Flags for characters that can be used for <code>generate($length, $characters)</code>
* @since 8.0.0
*/
public const CHAR_UPPER = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
/**
* @since 8.0.0
*/
public const CHAR_LOWER = 'abcdefghijklmnopqrstuvwxyz';
/**
* @since 8.0.0
*/
public const CHAR_DIGITS = '0123456789';
/**
* @since 8.0.0
*/
public const CHAR_SYMBOLS = '!\"#$%&\\\'()*+,-./:;<=>?@[\]^_`{|}~';
/**
* @since 12.0.0
*/
public const CHAR_ALPHANUMERIC = self::CHAR_UPPER . self::CHAR_LOWER . self::CHAR_DIGITS;
/**
* Characters that can be used for <code>generate($length, $characters)</code>, to
* generate human-readable random strings. Lower- and upper-case characters and digits
* are included. Characters which are ambiguous are excluded, such as I, l, and 1 and so on.
*
* @since 23.0.0
*/
public const CHAR_HUMAN_READABLE = 'abcdefgijkmnopqrstwxyzABCDEFGHJKLMNPQRSTWXYZ23456789';
/**
* Generate a random string of specified length.
* @param int $length The length of the generated string
* @param string $characters An optional list of characters to use if no character list is
* specified all valid base64 characters are used.
* @return string
* @since 8.0.0
*/
public function generate(int $length,
string $characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'): string;
}
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