--- /dev/null
+<?php
+/**
+ * A mcrypt-based encryption stream
+ *
+ * @author Roland Haeder <webmaster@shipsimu.org>
+ * @version 0.0.0
+ * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2015 Core Developer Team
+ * @license GNU GPL 3.0 or any newer version
+ * @link http://www.shipsimu.org
+ *
+ * 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 BaseStream implements EncryptableStream {
+ /**
+ * Separator on many places
+ */
+ const DATA_PAYLOAD_SEPARATOR = '|';
+
+ /**
+ * Protected constructor
+ *
+ * @return void
+ */
+ protected 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 $encrypted Encrypted string
+ */
+ public function encryptStream ($str, $key = NULL) {
+ // Debug message
+ //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ']: key[' . gettype($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 = $this->getRngInstance()->generateKey();
+ } // END - if
+
+ // Add some "payload" to the string
+ switch ($this->getRngInstance()->randomNumber(0, 8)) {
+ case 0:
+ $payloadString = crc32($this->getRngInstance()->randomString(10)) . self::DATA_PAYLOAD_SEPARATOR . base64_encode($str) . self::DATA_PAYLOAD_SEPARATOR . crc32($this->getRngInstance()->randomString(20));
+ break;
+
+ case 1:
+ $payloadString = crc32($this->getRngInstance()->randomString(10)) . self::DATA_PAYLOAD_SEPARATOR . base64_encode($str) . self::DATA_PAYLOAD_SEPARATOR . md5($this->getRngInstance()->randomString(20));
+ break;
+
+ case 2:
+ $payloadString = crc32($this->getRngInstance()->randomString(10)) . self::DATA_PAYLOAD_SEPARATOR . base64_encode($str) . self::DATA_PAYLOAD_SEPARATOR . sha1($this->getRngInstance()->randomString(20));
+ break;
+
+ case 3:
+ $payloadString = md5($this->getRngInstance()->randomString(10)) . self::DATA_PAYLOAD_SEPARATOR . base64_encode($str) . self::DATA_PAYLOAD_SEPARATOR . crc32($this->getRngInstance()->randomString(20));
+ break;
+
+ case 4:
+ $payloadString = md5($this->getRngInstance()->randomString(10)) . self::DATA_PAYLOAD_SEPARATOR . base64_encode($str) . self::DATA_PAYLOAD_SEPARATOR . md5($this->getRngInstance()->randomString(20));
+ break;
+
+ case 5:
+ $payloadString = md5($this->getRngInstance()->randomString(10)) . self::DATA_PAYLOAD_SEPARATOR . base64_encode($str) . self::DATA_PAYLOAD_SEPARATOR . sha1($this->getRngInstance()->randomString(20));
+ break;
+
+ case 6:
+ $payloadString = sha1($this->getRngInstance()->randomString(10)) . self::DATA_PAYLOAD_SEPARATOR . base64_encode($str) . self::DATA_PAYLOAD_SEPARATOR . crc32($this->getRngInstance()->randomString(20));
+ break;
+
+ case 7:
+ $payloadString = sha1($this->getRngInstance()->randomString(10)) . self::DATA_PAYLOAD_SEPARATOR . base64_encode($str) . self::DATA_PAYLOAD_SEPARATOR . md5($this->getRngInstance()->randomString(20));
+ break;
+
+ case 8:
+ $payloadString = sha1($this->getRngInstance()->randomString(10)) . self::DATA_PAYLOAD_SEPARATOR . base64_encode($str) . self::DATA_PAYLOAD_SEPARATOR . sha1($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 $str The unencrypted string
+ */
+ public function decryptStream ($encrypted, $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();
+ } // END - if
+
+ // Decrypt the string
+ $payloadString = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $encrypted, MCRYPT_MODE_ECB, $iv);
+
+ // Get the real string out
+ $strArray = explode(self::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 $data The data (string mostly) to "stream"
+ * @throws UnsupportedOperationException If this method is called (which is a mistake)
+ */
+ public function streamData ($data) {
+ self::createDebugInstance(__CLASS__)->debugOutput('Unhandled ' . strlen($data) . ' bytes in this stream.');
+ throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION);
+ }
+}
+
+// [EOF]
+?>
projects / core.git / blobdiff