55 lines
1.1 KiB
PHP
55 lines
1.1 KiB
PHP
<?php
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/**
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* Base Class for all stream ciphers
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*
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* PHP version 5
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*
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* @author Jim Wigginton <terrafrost@php.net>
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* @author Hans-Juergen Petrich <petrich@tronic-media.com>
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* @copyright 2007 Jim Wigginton
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* @license http://www.opensource.org/licenses/mit-license.html MIT License
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* @link http://phpseclib.sourceforge.net
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*/
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namespace phpseclib3\Crypt\Common;
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/**
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* Base Class for all stream cipher classes
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*
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* @author Jim Wigginton <terrafrost@php.net>
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*/
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abstract class StreamCipher extends SymmetricKey
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{
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/**
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* Block Length of the cipher
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*
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* Stream ciphers do not have a block size
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*
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* @see \phpseclib3\Crypt\Common\SymmetricKey::block_size
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* @var int
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*/
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protected $block_size = 0;
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/**
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* Default Constructor.
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*
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* @see \phpseclib3\Crypt\Common\SymmetricKey::__construct()
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* @return \phpseclib3\Crypt\Common\StreamCipher
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*/
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public function __construct()
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{
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parent::__construct('stream');
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}
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/**
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* Stream ciphers not use an IV
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*
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* @return bool
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*/
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public function usesIV()
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{
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return false;
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}
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}
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