3 * A null-encryption stream does not encrypt anything but can be used if e.e.
4 * mcrypt is not installed.
6 * @author Roland Haeder <webmaster@shipsimu.org>
8 * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 Developer Team
9 * @license GNU GPL 3.0 or any newer version
10 * @link http://www.shipsimu.org
12 * This program is free software: you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation, either version 3 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program. If not, see <http://www.gnu.org/licenses/>.
25 class NullCryptoStream extends BaseStream implements EncryptableStream {
27 * Protected constructor
31 protected function __construct () {
32 // Call parent constructor
33 parent::__construct(__CLASS__);
37 * Creates an instance of this node class
39 * @return $streamInstance An instance of this node class
41 public static final function createNullCryptoStream () {
43 $streamInstance = new NullCryptoStream();
45 // Return the instance
46 return $streamInstance;
50 * Encrypt the string with fixed salt
52 * @param $str The unencrypted string
53 * @param $key Optional key, if none provided, a random key will be generated
54 * @return $encrypted Encrypted string
56 public function encryptStream ($str, $key = NULL) {
57 // Just handle it over
58 $encrypted = (string) $str;
65 * Decrypt the string with fixed salt
67 * @param $encrypted Encrypted string
68 * @return $str The unencrypted string
70 public function decryptStream ($encrypted) {
71 // Just handle it over
72 $str = (string) $encrypted;
79 * Streams the data and maybe does something to it
81 * @param $data The data (string mostly) to "stream"
82 * @return $data The data (string mostly) to "stream"
83 * @throws UnsupportedOperationException If this method is called (which is a mistake)
85 public function streamData ($data) {
86 self::createDebugInstance(__CLASS__)->debugOutput('Unhandled ' . strlen($data) . ' bytes in this stream.');
87 throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION);