0e486e1ba0
as3crypto is actionscript 3 crypto library with TLS engine support. From: http://github.com/lyokato/as3crypto_patched Which was forked from: http://code.google.com/p/as3crypto/
44 lines
1.0 KiB
ActionScript
44 lines
1.0 KiB
ActionScript
/**
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* PKCS5
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*
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* A padding implementation of PKCS5.
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* Copyright (c) 2007 Henri Torgemane
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*
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* See LICENSE.txt for full license information.
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*/
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package com.hurlant.crypto.symmetric
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{
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import flash.utils.ByteArray;
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public class PKCS5 implements IPad
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{
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private var blockSize:uint;
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public function PKCS5(blockSize:uint=0) {
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this.blockSize = blockSize;
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}
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public function pad(a:ByteArray):void {
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var c:uint = blockSize-a.length%blockSize;
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for (var i:uint=0;i<c;i++){
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a[a.length] = c;
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}
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}
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public function unpad(a:ByteArray):void {
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var c:uint = a.length%blockSize;
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if (c!=0) throw new Error("PKCS#5::unpad: ByteArray.length isn't a multiple of the blockSize");
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c = a[a.length-1];
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for (var i:uint=c;i>0;i--) {
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var v:uint = a[a.length-1];
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a.length--;
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if (c!=v) throw new Error("PKCS#5:unpad: Invalid padding value. expected ["+c+"], found ["+v+"]");
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}
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// that is all.
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}
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public function setBlockSize(bs:uint):void {
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blockSize = bs;
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}
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}
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} |