1 files changed, 0 insertions, 134 deletions
diff --git a/lib/private/security/crypto.php b/lib/private/security/crypto.php
deleted file mode 100644
index 3c3ffb47398..00000000000
--- a/lib/private/security/crypto.php
+++ /dev/null
@@ -1,134 +0,0 @@
-<?php
-/**
- * @author Andreas Fischer <bantu@owncloud.com>
- * @author Lukas Reschke <lukas@owncloud.com>
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Roeland Jago Douma <rullzer@owncloud.com>
- *
- * @copyright Copyright (c) 2016, ownCloud, Inc.
- * @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;
-
-use phpseclib\Crypt\AES;
-use phpseclib\Crypt\Hash;
-use OCP\Security\ICrypto;
-use OCP\Security\ISecureRandom;
-use OCP\IConfig;
-
-/**
- * Class Crypto provides a high-level encryption layer using AES-CBC. If no key has been provided
- * it will use the secret defined in config.php as key. Additionally the message will be HMAC'd.
- *
- * Usage:
- * $encryptWithDefaultPassword = \OC::$server->getCrypto()->encrypt('EncryptedText');
- * $encryptWithCustompassword = \OC::$server->getCrypto()->encrypt('EncryptedText', 'password');
- *
- * @package OC\Security
- */
-class Crypto implements ICrypto {
-	/** @var AES $cipher */
-	private $cipher;
-	/** @var int */
-	private $ivLength = 16;
-	/** @var IConfig */
-	private $config;
-	/** @var ISecureRandom */
-	private $random;
-
-	/**
-	 * @param IConfig $config
-	 * @param ISecureRandom $random
-	 */
-	function __construct(IConfig $config, ISecureRandom $random) {
-		$this->cipher = new AES();
-		$this->config = $config;
-		$this->random = $random;
-	}
-
-	/**
-	 * @param string $message The message to authenticate
-	 * @param string $password Password to use (defaults to `secret` in config.php)
-	 * @return string Calculated HMAC
-	 */
-	public function calculateHMAC($message, $password = '') {
-		if($password === '') {
-			$password = $this->config->getSystemValue('secret');
-		}
-
-		// Append an "a" behind the password and hash it to prevent reusing the same password as for encryption
-		$password = hash('sha512', $password . 'a');
-
-		$hash = new Hash('sha512');
-		$hash->setKey($password);
-		return $hash->hash($message);
-	}
-
-	/**
-	 * Encrypts a value and adds an HMAC (Encrypt-Then-MAC)
-	 * @param string $plaintext
-	 * @param string $password Password to encrypt, if not specified the secret from config.php will be taken
-	 * @return string Authenticated ciphertext
-	 */
-	public function encrypt($plaintext, $password = '') {
-		if($password === '') {
-			$password = $this->config->getSystemValue('secret');
-		}
-		$this->cipher->setPassword($password);
-
-		$iv = $this->random->generate($this->ivLength);
-		$this->cipher->setIV($iv);
-
-		$ciphertext = bin2hex($this->cipher->encrypt($plaintext));
-		$hmac = bin2hex($this->calculateHMAC($ciphertext.$iv, $password));
-
-		return $ciphertext.'|'.$iv.'|'.$hmac;
-	}
-
-	/**
-	 * Decrypts a value and verifies the HMAC (Encrypt-Then-Mac)
-	 * @param string $authenticatedCiphertext
-	 * @param string $password Password to encrypt, if not specified the secret from config.php will be taken
-	 * @return string plaintext
-	 * @throws \Exception If the HMAC does not match
-	 */
-	public function decrypt($authenticatedCiphertext, $password = '') {
-		if($password === '') {
-			$password = $this->config->getSystemValue('secret');
-		}
-		$this->cipher->setPassword($password);
-
-		$parts = explode('|', $authenticatedCiphertext);
-		if(sizeof($parts) !== 3) {
-			throw new \Exception('Authenticated ciphertext could not be decoded.');
-		}
-
-		$ciphertext = hex2bin($parts[0]);
-		$iv = $parts[1];
-		$hmac = hex2bin($parts[2]);
-
-		$this->cipher->setIV($iv);
-
-		if(!hash_equals($this->calculateHMAC($parts[0].$parts[1], $password), $hmac)) {
-			throw new \Exception('HMAC does not match.');
-		}
-
-		return $this->cipher->decrypt($ciphertext);
-	}
-
-}