migrate therinaldos.com data

wedding-pics/lib/private/Security/CSRF/CsrfToken.php

@@ -0,0 +1,75 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ *
+ * @author Christoph Wurst <christoph@winzerhof-wurst.at>
+ * @author Leon Klingele <git@leonklingele.de>
+ * @author Lukas Reschke <lukas@statuscode.ch>
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OC\Security\CSRF;
+
+/**
+ * Class CsrfToken represents the stored or provided CSRF token. To mitigate
+ * BREACH alike vulnerabilities the token is returned in an encrypted value as
+ * well in an unencrypted value. For display measures to the user always the
+ * unencrypted one should be chosen.
+ *
+ * @package OC\Security\CSRF
+ */
+class CsrfToken {
+	private string $encryptedValue = '';
+
+	/**
+	 * @param string $value Value of the token. Can be encrypted or not encrypted.
+	 */
+	public function __construct(
+		private string $value,
+	) {
+	}
+
+	/**
+	 * Encrypted value of the token. This is used to mitigate BREACH alike
+	 * vulnerabilities. For display measures do use this functionality.
+	 */
+	public function getEncryptedValue(): string {
+		if ($this->encryptedValue === '') {
+			$sharedSecret = random_bytes(\strlen($this->value));
+			$this->encryptedValue = base64_encode($this->value ^ $sharedSecret) . ':' . base64_encode($sharedSecret);
+		}
+
+		return $this->encryptedValue;
+	}
+
+	/**
+	 * The unencrypted value of the token. Used for decrypting an already
+	 * encrypted token.
+	 */
+	public function getDecryptedValue(): string {
+		$token = explode(':', $this->value);
+		if (\count($token) !== 2) {
+			return '';
+		}
+		$obfuscatedToken = $token[0];
+		$secret = $token[1];
+		return base64_decode($obfuscatedToken) ^ base64_decode($secret);
+	}
+}

wedding-pics/lib/private/Security/CSRF/CsrfTokenGenerator.php

@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ *
+ * @author Lukas Reschke <lukas@statuscode.ch>
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OC\Security\CSRF;
+
+use OCP\Security\ISecureRandom;
+
+/**
+ * Class CsrfTokenGenerator is used to generate a cryptographically secure
+ * pseudo-random number for the token.
+ *
+ * @package OC\Security\CSRF
+ */
+class CsrfTokenGenerator {
+	public function __construct(
+		private ISecureRandom $random,
+	) {
+	}
+
+	/**
+	 * Generate a new CSRF token.
+	 *
+	 * @param int $length Length of the token in characters.
+	 */
+	public function generateToken(int $length = 32): string {
+		return $this->random->generate($length);
+	}
+}

wedding-pics/lib/private/Security/CSRF/CsrfTokenManager.php

@@ -0,0 +1,97 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ *
+ * @author Christoph Wurst <christoph@winzerhof-wurst.at>
+ * @author Lukas Reschke <lukas@statuscode.ch>
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OC\Security\CSRF;
+
+use OC\Security\CSRF\TokenStorage\SessionStorage;
+
+/**
+ * Class CsrfTokenManager is the manager for all CSRF token related activities.
+ *
+ * @package OC\Security\CSRF
+ */
+class CsrfTokenManager {
+	private SessionStorage $sessionStorage;
+	private ?CsrfToken $csrfToken = null;
+
+	public function __construct(
+		private CsrfTokenGenerator $tokenGenerator,
+		SessionStorage $storageInterface,
+	) {
+		$this->sessionStorage = $storageInterface;
+	}
+
+	/**
+	 * Returns the current CSRF token, if none set it will create a new one.
+	 */
+	public function getToken(): CsrfToken {
+		if (!\is_null($this->csrfToken)) {
+			return $this->csrfToken;
+		}
+
+		if ($this->sessionStorage->hasToken()) {
+			$value = $this->sessionStorage->getToken();
+		} else {
+			$value = $this->tokenGenerator->generateToken();
+			$this->sessionStorage->setToken($value);
+		}
+
+		$this->csrfToken = new CsrfToken($value);
+		return $this->csrfToken;
+	}
+
+	/**
+	 * Invalidates any current token and sets a new one.
+	 */
+	public function refreshToken(): CsrfToken {
+		$value = $this->tokenGenerator->generateToken();
+		$this->sessionStorage->setToken($value);
+		$this->csrfToken = new CsrfToken($value);
+		return $this->csrfToken;
+	}
+
+	/**
+	 * Remove the current token from the storage.
+	 */
+	public function removeToken(): void {
+		$this->csrfToken = null;
+		$this->sessionStorage->removeToken();
+	}
+
+	/**
+	 * Verifies whether the provided token is valid.
+	 */
+	public function isTokenValid(CsrfToken $token): bool {
+		if (!$this->sessionStorage->hasToken()) {
+			return false;
+		}
+
+		return hash_equals(
+			$this->sessionStorage->getToken(),
+			$token->getDecryptedValue()
+		);
+	}
+}

wedding-pics/lib/private/Security/CSRF/TokenStorage/SessionStorage.php

@@ -0,0 +1,81 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ *
+ * @author Christoph Wurst <christoph@winzerhof-wurst.at>
+ * @author Joas Schilling <coding@schilljs.com>
+ * @author Lukas Reschke <lukas@statuscode.ch>
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OC\Security\CSRF\TokenStorage;
+
+use OCP\ISession;
+
+/**
+ * Class SessionStorage provides the session storage
+ *
+ * @package OC\Security\CSRF\TokenStorage
+ */
+class SessionStorage {
+	public function __construct(
+		private ISession $session,
+	) {
+	}
+
+	public function setSession(ISession $session): void {
+		$this->session = $session;
+	}
+
+	/**
+	 * Returns the current token or throws an exception if none is found.
+	 *
+	 * @throws \Exception
+	 */
+	public function getToken(): string {
+		$token = $this->session->get('requesttoken');
+		if (empty($token)) {
+			throw new \Exception('Session does not contain a requesttoken');
+		}
+
+		return $token;
+	}
+
+	/**
+	 * Set the valid current token to $value.
+	 */
+	public function setToken(string $value): void {
+		$this->session->set('requesttoken', $value);
+	}
+
+	/**
+	 * Removes the current token.
+	 */
+	public function removeToken(): void {
+		$this->session->remove('requesttoken');
+	}
+
+	/**
+	 * Whether the storage has a storage.
+	 */
+	public function hasToken(): bool {
+		return $this->session->exists('requesttoken');
+	}
+}