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caff1023ea
To continue this formatting madness, here's a tiny patch that adds unified formatting for control structures like if and loops as well as classes, their methods and anonymous functions. This basically forces the constructs to start on the same line. This is not exactly what PSR2 wants, but I think we can have a few exceptions with "our" style. The starting of braces on the same line is pracrically standard for our code. This also removes and empty lines from method/function bodies at the beginning and end. Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>
81 lines
2.3 KiB
PHP
81 lines
2.3 KiB
PHP
<?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 Leon Klingele <git@leonklingele.de>
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* @author Lukas Reschke <lukas@statuscode.ch>
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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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\CSRF;
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/**
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* Class CsrfToken represents the stored or provided CSRF token. To mitigate
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* BREACH alike vulnerabilities the token is returned in an encrypted value as
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* well in an unencrypted value. For display measures to the user always the
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* unencrypted one should be chosen.
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*
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* @package OC\Security\CSRF
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*/
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class CsrfToken {
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/** @var string */
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private $value;
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/** @var string */
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private $encryptedValue = '';
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/**
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* @param string $value Value of the token. Can be encrypted or not encrypted.
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*/
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public function __construct(string $value) {
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$this->value = $value;
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}
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/**
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* Encrypted value of the token. This is used to mitigate BREACH alike
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* vulnerabilities. For display measures do use this functionality.
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*
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* @return string
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*/
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public function getEncryptedValue(): string {
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if ($this->encryptedValue === '') {
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$sharedSecret = random_bytes(\strlen($this->value));
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$this->encryptedValue = base64_encode($this->value ^ $sharedSecret) . ':' . base64_encode($sharedSecret);
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}
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return $this->encryptedValue;
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}
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/**
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* The unencrypted value of the token. Used for decrypting an already
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* encrypted token.
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*
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* @return string
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*/
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public function getDecryptedValue(): string {
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$token = explode(':', $this->value);
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if (\count($token) !== 2) {
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return '';
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}
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$obfuscatedToken = $token[0];
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$secret = $token[1];
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return base64_decode($obfuscatedToken) ^ base64_decode($secret);
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}
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}
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