src/Biz/Util/Phpsec/Crypt/Base.php

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<?php

/**
 * Base Class for all \Biz\Util\Phpsec\Crypt\* cipher classes.
 *
 * PHP version 5
 *
 * Internally for phpseclib developers:
 *  If you plan to add a new cipher class, please note following rules:
 *
 *  - The new \Biz\Util\Phpsec\Crypt\* cipher class should extend \Biz\Util\Phpsec\Crypt\Base
 *
 *  - Following methods are then required to be overridden/overloaded:
 *
 *    - _encryptBlock()
 *
 *    - _decryptBlock()
 *
 *    - _setupKey()
 *
 *  - All other methods are optional to be overridden/overloaded
 *
 *  - Look at the source code of the current ciphers how they extend \Biz\Util\Phpsec\Crypt\Base
 *    and take one of them as a start up for the new cipher class.
 *
 *  - Please read all the other comments/notes/hints here also for each class var/method
 *
 * @category  Crypt
 *
 * @author    Jim Wigginton <terrafrost@php.net>
 * @author    Hans-Juergen Petrich <petrich@tronic-media.com>
 * @copyright 2007 Jim Wigginton
 * @license   http://www.opensource.org/licenses/mit-license.html  MIT License
 *
 * @see      http://phpseclib.sourceforge.net
 */

namespace Biz\Util\Phpsec\Crypt;

/**
 * Base Class for all \Biz\Util\Phpsec\Crypt\* cipher classes.
 *
 *
 * @author  Jim Wigginton <terrafrost@php.net>
 * @author  Hans-Juergen Petrich <petrich@tronic-media.com>
 */
abstract class Base
{
    /**#@+
     * @access public
     * @see \Biz\Util\Phpsec\Crypt\Base::encrypt()
     * @see \Biz\Util\Phpsec\Crypt\Base::decrypt()
     */
    /**
     * Encrypt / decrypt using the Counter mode.
     *
     * Set to -1 since that's what Crypt/Random.php uses to index the CTR mode.
     *
     * @see http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Counter_.28CTR.29
     */