-<?php
-// Own namespace
-namespace Org\Mxchange\CoreFramework\Stream\Crypto\Mcrypt;
-
-// Import framework stuff
-use Org\Mxchange\CoreFramework\Crypto\RandomNumber\RandomNumberGenerator;
-use Org\Mxchange\CoreFramework\Generic\FrameworkInterface;
-use Org\Mxchange\CoreFramework\Generic\UnsupportedOperationException;
-use Org\Mxchange\CoreFramework\Stream\Crypto\BaseCryptoStream;
-use Org\Mxchange\CoreFramework\Stream\Crypto\EncryptableStream;
-
-/**
- * A mcrypt-based encryption stream
- *
- * @author Roland Haeder <webmaster@shipsimu.org>
- * @version 0.0.0
- * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2023 Core Developer Team
- * @license GNU GPL 3.0 or any newer version
- * @link http://www.shipsimu.org
- * @todo mcrypt will become deprecated, rewrite to OpenSSL
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-class McryptStream extends BaseCryptoStream implements EncryptableStream {
- /**
- * Protected constructor
- *
- * @return void
- */
- private function __construct () {
- // Call parent constructor
- parent::__construct(__CLASS__);
- }
-
- /**
- * Creates an instance of this node class
- *
- * @param $rngInstance An RNG instance
- * @return $streamInstance An instance of this node class
- */
- public static final function createMcryptStream (RandomNumberGenerator $rngInstance) {
- // Get a new instance
- $streamInstance = new McryptStream();
-
- // Set the RNG instance
- $streamInstance->setRngInstance($rngInstance);
-
- // Return the instance
- return $streamInstance;
- }
-
- /**
- * Encrypt the string with fixed salt
- *
- * @param $str The unencrypted string
- * @param $key Optional key, if none provided, a random key will be generated
- * @return $encrypted Encrypted string
- */
- public function encryptStream (string $str, string $key = NULL) {
- // Debug message
- //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('MCRYPT-STREAM: key[' . gettype($key) . ']=' . $key);
-
- // Init crypto module
- $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
- $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
-
- // Generate key, if none provided
- if (is_null($key)) {
- // None provided
- $key = $this->getRngInstance()->generateKey();
- }
-
- // Add some "payload" to the string
- switch ($this->getRngInstance()->randomNumber(0, 8)) {
- case 0:
- $payloadString = crc32($this->getRngInstance()->randomString(10)) . EncryptableStream::DATA_PAYLOAD_SEPARATOR . base64_encode($str) . EncryptableStream::DATA_PAYLOAD_SEPARATOR . crc32($this->getRngInstance()->randomString(20));
- break;
-
- case 1:
- $payloadString = crc32($this->getRngInstance()->randomString(10)) . EncryptableStream::DATA_PAYLOAD_SEPARATOR . base64_encode($str) . EncryptableStream::DATA_PAYLOAD_SEPARATOR . md5($this->getRngInstance()->randomString(20));
- break;
-
- case 2:
- $payloadString = crc32($this->getRngInstance()->randomString(10)) . EncryptableStream::DATA_PAYLOAD_SEPARATOR . base64_encode($str) . EncryptableStream::DATA_PAYLOAD_SEPARATOR . sha1($this->getRngInstance()->randomString(20));
- break;
-
- case 3:
- $payloadString = md5($this->getRngInstance()->randomString(10)) . EncryptableStream::DATA_PAYLOAD_SEPARATOR . base64_encode($str) . EncryptableStream::DATA_PAYLOAD_SEPARATOR . crc32($this->getRngInstance()->randomString(20));
- break;
-
- case 4:
- $payloadString = md5($this->getRngInstance()->randomString(10)) . EncryptableStream::DATA_PAYLOAD_SEPARATOR . base64_encode($str) . EncryptableStream::DATA_PAYLOAD_SEPARATOR . md5($this->getRngInstance()->randomString(20));
- break;
-
- case 5:
- $payloadString = md5($this->getRngInstance()->randomString(10)) . EncryptableStream::DATA_PAYLOAD_SEPARATOR . base64_encode($str) . EncryptableStream::DATA_PAYLOAD_SEPARATOR . sha1($this->getRngInstance()->randomString(20));
- break;
-
- case 6:
- $payloadString = sha1($this->getRngInstance()->randomString(10)) . EncryptableStream::DATA_PAYLOAD_SEPARATOR . base64_encode($str) . EncryptableStream::DATA_PAYLOAD_SEPARATOR . crc32($this->getRngInstance()->randomString(20));
- break;
-
- case 7:
- $payloadString = sha1($this->getRngInstance()->randomString(10)) . EncryptableStream::DATA_PAYLOAD_SEPARATOR . base64_encode($str) . EncryptableStream::DATA_PAYLOAD_SEPARATOR . md5($this->getRngInstance()->randomString(20));
- break;
-
- case 8:
- $payloadString = sha1($this->getRngInstance()->randomString(10)) . EncryptableStream::DATA_PAYLOAD_SEPARATOR . base64_encode($str) . EncryptableStream::DATA_PAYLOAD_SEPARATOR . sha1($this->getRngInstance()->randomString(20));
- break;
- }
-
- // Encrypt the string
- $encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $payloadString, MCRYPT_MODE_ECB, $iv);
-
- // Return the string
- return $encrypted;
- }
-
- /**
- * Decrypt the string with fixed salt
- *
- * @param $encrypted Encrypted string
- * @param $key Optional key, if none provided, a random key will be generated
- * @return $str The unencrypted string
- */
- public function decryptStream (string $encrypted, string $key = NULL) {
- // Init crypto module
- $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
- $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
-
- // Shall we use a default key or custom?
- if (is_null($key)) {
- // Generate (default) key
- $key = $this->getRngInstance()->generateKey();
- }
-
- // Decrypt the string
- $payloadString = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $encrypted, MCRYPT_MODE_ECB, $iv);
-
- // Get the real string out
- $strArray = explode(EncryptableStream::DATA_PAYLOAD_SEPARATOR, $payloadString);
-
- // Does the element count match?
- assert(count($strArray) == 3);
-
- // Decode the string
- $str = base64_decode($strArray[1]);
-
- // Trim trailing nulls away
- $str = rtrim($str, "\0");
-
- // Return the string
- return $str;
- }
-
- /**
- * Streams the data and maybe does something to it
- *
- * @param $data The data (string mostly) to "stream"
- * @return $data The data (string mostly) to "stream"
- * @throws UnsupportedOperationException If this method is called (which is a mistake)
- */
- public function streamData (string $data) {
- self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('Unhandled ' . strlen($data) . ' bytes in this stream.');
- throw new UnsupportedOperationException([$this, __FUNCTION__], FrameworkInterface::EXCEPTION_UNSPPORTED_OPERATION);
- }
-
-}
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