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/**
* PKCS5
*
* A padding implementation of PKCS5.
* Copyright (c) 2007 Henri Torgemane
*
* See LICENSE.txt for full license information.
*/
package com.hurlant.crypto.symmetric
{
import flash.utils.ByteArray;
public class PKCS5 implements IPad
{
private var blockSize:uint;
public function PKCS5(blockSize:uint=0) {
this.blockSize = blockSize;
}
public function pad(a:ByteArray):void {
var c:uint = blockSize-a.length%blockSize;
for (var i:uint=0;i<c;i++){
a[a.length] = c;
}
}
public function unpad(a:ByteArray):void {
var c:uint = a.length%blockSize;
if (c!=0) throw new Error("PKCS#5::unpad: ByteArray.length isn't a multiple of the blockSize");
c = a[a.length-1];
for (var i:uint=c;i>0;i--) {
var v:uint = a[a.length-1];
a.length--;
if (c!=v) throw new Error("PKCS#5:unpad: Invalid padding value. expected ["+c+"], found ["+v+"]");
}
// that is all.
}
public function setBlockSize(bs:uint):void {
blockSize = bs;
}
}
}
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I currently hold the following qualifications (amongst others, I also studied Music Technology and Electronics, for my sins)
- MSc (Passed with distinctions), in Information Technology for E-Commerce
- BSc Hons (1st class) in Computer Science & Artificial Intelligence
Both of these at Sussex University UK.
Award(s)
I am lucky enough to have won a few awards for Zany Crazy code articles over the years
- Microsoft C# MVP 2016
- Codeproject MVP 2016
- Microsoft C# MVP 2015
- Codeproject MVP 2015
- Microsoft C# MVP 2014
- Codeproject MVP 2014
- Microsoft C# MVP 2013
- Codeproject MVP 2013
- Microsoft C# MVP 2012
- Codeproject MVP 2012
- Microsoft C# MVP 2011
- Codeproject MVP 2011
- Microsoft C# MVP 2010
- Codeproject MVP 2010
- Microsoft C# MVP 2009
- Codeproject MVP 2009
- Microsoft C# MVP 2008
- Codeproject MVP 2008
- And numerous codeproject awards which you can see over at my blog