Des 加密解密 .Net-Flex

这段时间一直在忙一个Flex+.net的项目，老大让我们把关键数据加密。本来以为很简单，我们选择了Des算法，我的Flex客户端和同事的.net服务端都很快完成了代码。但是一联调发现根本对不上，我这边用的是开源库，他那边是.net类库自带的，调试的结果是两者的算法细节可能有所不同。最后我把flex端的加密解密算法移植到了.net端，以保证两端的一致性。

ActionScript代码：

import EMagazine.Util.Helpers.StringHelper;

import flash.utils.ByteArray;

public class DesKey
{
/**
* what follows is mainly taken from "Applied Cryptography", by Bruce
* Schneier, however it also bears great resemblance to Richard
* Outerbridge's D3DES...
*/

private static const Df_Key:Array = [ 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32,
0x10, 0x89, 0xab, 0xcd, 0xef, 0x01, 0x23, 0x45, 0x67 ];

private static const bytebit:Array = [ 128, 64, 32, 16, 8, 4, 2, 1 ];

private static const bigbyte:Array = [ 0x800000, 0x400000, 0x200000, 0x100000, 0x80000, 0x40000, 0x20000, 0x10000, 0x8000,
0x4000, 0x2000, 0x1000, 0x800, 0x400, 0x200, 0x100, 0x80, 0x40, 0x20, 0x10, 0x8, 0x4, 0x2, 0x1 ];

/*
* Use the key schedule specified in the Standard (ANSI X3.92-1981).
*/

private static const pc1:Array = [ 56, 48, 40, 32, 24, 16, 8, 0, 57, 49, 41, 33, 25, 17, 9, 1, 58, 50, 42, 34, 26, 18, 10, 2,
59, 51, 43, 35, 62, 54, 46, 38, 30, 22, 14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 60, 52, 44, 36, 28, 20, 12,
4, 27, 19, 11, 3 ];

private static const totrot:Array = [ 1, 2, 4, 6, 8, 10, 12, 14, 15, 17, 19, 21, 23, 25, 27, 28 ];

private static const pc2:Array = [ 13, 16, 10, 23, 0, 4, 2, 27, 14, 5, 20, 9, 22, 18, 11, 3, 25, 7, 15, 6, 26, 19, 12, 1, 40,
51, 30, 36, 46, 54, 29, 39, 50, 44, 32, 47, 43, 48, 38, 55, 33, 52, 45, 41, 49, 35, 28, 31 ];

private static const SP1:Array = [ 0x01010400, 0x00000000, 0x00010000, 0x01010404, 0x01010004, 0x00010404, 0x00000004,
0x00010000, 0x00000400, 0x01010400, 0x01010404, 0x00000400, 0x01000404, 0x01010004, 0x01000000, 0x00000004,
0x00000404, 0x01000400, 0x01000400, 0x00010400, 0x00010400, 0x01010000, 0x01010000, 0x01000404, 0x00010004,
0x01000004, 0x01000004, 0x00010004, 0x00000000, 0x00000404, 0x00010404, 0x01000000, 0x00010000, 0x01010404,
0x00000004, 0x01010000, 0x01010400, 0x01000000, 0x01000000, 0x00000400, 0x01010004, 0x00010000, 0x00010400,
0x01000004, 0x00000400, 0x00000004, 0x01000404, 0x00010404, 0x01010404, 0x00010004, 0x01010000, 0x01000404,
0x01000004, 0x00000404, 0x00010404, 0x01010400, 0x00000404, 0x01000400, 0x01000400, 0x00000000, 0x00010004,
0x00010400, 0x00000000, 0x01010004 ];

private static const SP2:Array = [ 0x80108020, 0x80008000, 0x00008000, 0x00108020, 0x00100000, 0x00000020, 0x80100020,
0x80008020, 0x80000020, 0x80108020, 0x80108000, 0x80000000, 0x80008000, 0x00100000, 0x00000020, 0x80100020,
0x00108000, 0x00100020, 0x80008020, 0x00000000, 0x80000000, 0x00008000, 0x00108020, 0x80100000, 0x00100020,
0x80000020, 0x00000000, 0x00108000, 0x00008020, 0x80108000, 0x80100000, 0x00008020, 0x00000000, 0x00108020,
0x80100020, 0x00100000, 0x80008020, 0x80100000, 0x80108000, 0x00008000, 0x80100000, 0x80008000, 0x00000020,
0x80108020, 0x00108020, 0x00000020, 0x00008000, 0x80000000, 0x00008020, 0x80108000, 0x00100000, 0x80000020,
0x00100020, 0x80008020, 0x80000020, 0x00100020, 0x00108000, 0x00000000, 0x80008000, 0x00008020, 0x80000000,
0x80100020, 0x80108020, 0x00108000 ];

private static const SP3:Array = [ 0x00000208, 0x08020200, 0x00000000, 0x08020008, 0x08000200, 0x00000000, 0x00020208,
0x08000200, 0x00020008, 0x08000008, 0x08000008, 0x00020000, 0x08020208, 0x00020008, 0x08020000, 0x00000208,
0x08000000, 0x00000008, 0x08020200, 0x00000200, 0x00020200, 0x08020000, 0x08020008, 0x00020208, 0x08000208,
0x00020200, 0x00020000, 0x08000208, 0x00000008, 0x08020208, 0x00000200, 0x08000000, 0x08020200, 0x08000000,
0x00020008, 0x00000208, 0x00020000, 0x08020200, 0x08000200, 0x00000000, 0x00000200, 0x00020008, 0x08020208,
0x08000200, 0x08000008, 0x00000200, 0x00000000, 0x08020008, 0x08000208, 0x00020000, 0x08000000, 0x08020208,
0x00000008, 0x00020208, 0x00020200, 0x08000008, 0x08020000, 0x08000208, 0x00000208, 0x08020000, 0x00020208,
0x00000008, 0x08020008, 0x00020200 ];

private static const SP4:Array = [ 0x00802001, 0x00002081, 0x00002081, 0x00000080, 0x00802080, 0x00800081, 0x00800001,
0x00002001, 0x00000000, 0x00802000, 0x00802000, 0x00802081, 0x00000081, 0x00000000, 0x00800080, 0x00800001,
0x00000001, 0x00002000, 0x00800000, 0x00802001, 0x00000080, 0x00800000, 0x00002001, 0x00002080, 0x00800081,
0x00000001, 0x00002080, 0x00800080, 0x00002000, 0x00802080, 0x00802081, 0x00000081, 0x00800080, 0x00800001,
0x00802000, 0x00802081, 0x00000081, 0x00000000, 0x00000000, 0x00802000, 0x00002080, 0x00800080, 0x00800081,
0x00000001, 0x00802001, 0x00002081, 0x00002081, 0x00000080, 0x00802081, 0x00000081, 0x00000001, 0x00002000,
0x00800001, 0x00002001, 0x00802080, 0x00800081, 0x00002001, 0x00002080, 0x00800000, 0x00802001, 0x00000080,
0x00800000, 0x00002000, 0x00802080 ];

private static const SP5:Array = [ 0x00000100, 0x02080100, 0x02080000, 0x42000100, 0x00080000, 0x00000100, 0x40000000,
0x02080000, 0x40080100, 0x00080000, 0x02000100, 0x40080100, 0x42000100, 0x42080000, 0x00080100, 0x40000000,
0x02000000, 0x40080000, 0x40080000, 0x00000000, 0x40000100, 0x42080100, 0x42080100, 0x02000100, 0x42080000,
0x40000100, 0x00000000, 0x42000000, 0x02080100, 0x02000000, 0x42000000, 0x00080100, 0x00080000, 0x42000100,
0x00000100, 0x02000000, 0x40000000, 0x02080000, 0x42000100, 0x40080100, 0x02000100, 0x40000000, 0x42080000,
0x02080100, 0x40080100, 0x00000100, 0x02000000, 0x42080000, 0x42080100, 0x00080100, 0x42000000, 0x42080100,
0x02080000, 0x00000000, 0x40080000, 0x42000000, 0x00080100, 0x02000100, 0x40000100, 0x00080000, 0x00000000,
0x40080000, 0x02080100, 0x40000100 ];

private static const SP6:Array = [ 0x20000010, 0x20400000, 0x00004000, 0x20404010, 0x20400000, 0x00000010, 0x20404010,
0x00400000, 0x20004000, 0x00404010, 0x00400000, 0x20000010, 0x00400010, 0x20004000, 0x20000000, 0x00004010,
0x00000000, 0x00400010, 0x20004010, 0x00004000, 0x00404000, 0x20004010, 0x00000010, 0x20400010, 0x20400010,
0x00000000, 0x00404010, 0x20404000, 0x00004010, 0x00404000, 0x20404000, 0x20000000, 0x20004000, 0x00000010,
0x20400010, 0x00404000, 0x20404010, 0x00400000, 0x00004010, 0x20000010, 0x00400000, 0x20004000, 0x20000000,
0x00004010, 0x20000010, 0x20404010, 0x00404000, 0x20400000, 0x00404010, 0x20404000, 0x00000000, 0x20400010,
0x00000010, 0x00004000, 0x20400000, 0x00404010, 0x00004000, 0x00400010, 0x20004010, 0x00000000, 0x20404000,
0x20000000, 0x00400010, 0x20004010 ];

private static const SP7:Array = [ 0x00200000, 0x04200002, 0x04000802, 0x00000000, 0x00000800, 0x04000802, 0x00200802,
0x04200800, 0x04200802, 0x00200000, 0x00000000, 0x04000002, 0x00000002, 0x04000000, 0x04200002, 0x00000802,
0x04000800, 0x00200802, 0x00200002, 0x04000800, 0x04000002, 0x04200000, 0x04200800, 0x00200002, 0x04200000,
0x00000800, 0x00000802, 0x04200802, 0x00200800, 0x00000002, 0x04000000, 0x00200800, 0x04000000, 0x00200800,
0x00200000, 0x04000802, 0x04000802, 0x04200002, 0x04200002, 0x00000002, 0x00200002, 0x04000000, 0x04000800,
0x00200000, 0x04200800, 0x00000802, 0x00200802, 0x04200800, 0x00000802, 0x04000002, 0x04200802, 0x04200000,
0x00200800, 0x00000000, 0x00000002, 0x04200802, 0x00000000, 0x00200802, 0x04200000, 0x00000800, 0x04000002,
0x04000800, 0x00000800, 0x00200002 ];

private static const SP8:Array = [ 0x10001040, 0x00001000, 0x00040000, 0x10041040, 0x10000000, 0x10001040, 0x00000040,
0x10000000, 0x00040040, 0x10040000, 0x10041040, 0x00041000, 0x10041000, 0x00041040, 0x00001000, 0x00000040,
0x10040000, 0x10000040, 0x10001000, 0x00001040, 0x00041000, 0x00040040, 0x10040040, 0x10041000, 0x00001040,
0x00000000, 0x00000000, 0x10040040, 0x10000040, 0x10001000, 0x00041040, 0x00040000, 0x00041040, 0x00040000,
0x10041000, 0x00001000, 0x00000040, 0x10040040, 0x00001000, 0x00041040, 0x10001000, 0x00000040, 0x10000040,
0x10040000, 0x10040040, 0x10000000, 0x00040000, 0x10001040, 0x00000000, 0x10041040, 0x00040040, 0x10000040,
0x10040000, 0x10001000, 0x10001040, 0x00000000, 0x10041040, 0x00041000, 0x00041000, 0x00001040, 0x00001040,
0x00040040, 0x10000000, 0x10041000 ];

protected var key:ByteArray;
protected var encKey:Array;
protected var decKey:Array;

public function DesKey(key:ByteArray) {
this.key = key;
this.encKey = generateWorkingKey(true, key, 0);
this.decKey = generateWorkingKey(false, key, 0);
}

public function getBlockSize():uint
{
return 8;
}

public function dispose():void
{
var i:uint=0;
for (i=0;i<encKey.length;i++) { encKey[i]=0; }
for (i=0;i<decKey.length;i++) { decKey[i]=0; }
encKey=null;
decKey=null;
for (i=0;i<key.length;i++) { key[i]=0; }
key.length = 0;
key = null;
Memory.gc();
}

public function encrypt(block:ByteArray, index:uint=0):void
{
for(var i:uint = index; i < block.length; i+=8)
{
desFunc(encKey, block, i, block, i);
}
}

public function decrypt(block:ByteArray, index:uint=0):void
{
for(var i:uint = index; i < block.length; i+=8)
{
desFunc(decKey, block, i, block, i);
}
}

/**
* generate an integer based working key based on our secret key and what we
* processing we are planning to do.
*
* Acknowledgements for this routine go to James Gillogly & Phil Karn.
*/
protected function generateWorkingKey(encrypting:Boolean, key:ByteArray, off:uint):Array
{
//int[] newKey = new int[32];
var newKey:Array = [];
//boolean[] pc1m = new boolean[56], pcr = new boolean[56];
var pc1m:ByteArray = new ByteArray;
var pcr:ByteArray = new ByteArray;

var l:uint;

for (var j:uint = 0; j < 56; j++)
{
l = pc1[j];

pc1m[j] = ((key[off + (l >>> 3)] & bytebit[l & 07]) != 0);
}

for (var i:uint = 0; i < 16; i++)
{
var m:uint;
var n:uint;

if (encrypting)
{
m = i << 1;
}
else
{
m = (15 - i) << 1;
}

n = m + 1;
newKey[m] = newKey
= 0;

for (j = 0; j < 28; j++)
{
l = j + totrot[i];
if (l < 28)
{
pcr[j] = pc1m[l];
}
else
{
pcr[j] = pc1m[l - 28];
}
}

for (j = 28; j < 56; j++)
{
l = j + totrot[i];
if (l < 56)
{
pcr[j] = pc1m[l];
}
else
{
pcr[j] = pc1m[l - 28];
}
}

for (j = 0; j < 24; j++)
{
if (pcr[pc2[j]])
{
newKey[m] |= bigbyte[j];
}

if (pcr[pc2[j + 24]])
{
newKey
|= bigbyte[j];
}
}
}

//
// store the processed key
//
for (i = 0; i != 32; i += 2)
{
var i1:uint;
var i2:uint;

i1 = newKey[i];
i2 = newKey[i + 1];

newKey[i] = ((i1 & 0x00fc0000) << 6) | ((i1 & 0x00000fc0) << 10) | ((i2 & 0x00fc0000) >>> 10)
| ((i2 & 0x00000fc0) >>> 6);

newKey[i + 1] = ((i1 & 0x0003f000) << 12) | ((i1 & 0x0000003f) << 16) | ((i2 & 0x0003f000) >>> 4)
| (i2 & 0x0000003f);
}
return newKey;
}

/**
* the DES engine.
*/
protected function desFunc(wKey:Array, inp:ByteArray, inOff:uint, out:ByteArray, outOff:uint):void
{
var work:uint;
var right:uint;
var left:uint;

left = (inp[inOff + 0] & 0xff) << 24;
left |= (inp[inOff + 1] & 0xff) << 16;
left |= (inp[inOff + 2] & 0xff) << 8;
left |= (inp[inOff + 3] & 0xff);

right = (inp[inOff + 4] & 0xff) << 24;
right |= (inp[inOff + 5] & 0xff) << 16;
right |= (inp[inOff + 6] & 0xff) << 8;
right |= (inp[inOff + 7] & 0xff);

//trace(inp[6] + "," + inp[7]);

work = ((left >>> 4) ^ right) & 0x0f0f0f0f;
right ^= work;
left ^= (work << 4);
work = ((left >>> 16) ^ right) & 0x0000ffff;
right ^= work;
left ^= (work << 16);
work = ((right >>> 2) ^ left) & 0x33333333;
left ^= work;
right ^= (work << 2);
work = ((right >>> 8) ^ left) & 0x00ff00ff;
left ^= work;
right ^= (work << 8);
right = ((right << 1) | ((right >>> 31) & 1)) & 0xffffffff;
work = (left ^ right) & 0xaaaaaaaa;
left ^= work;
right ^= work;
left = ((left << 1) | ((left >>> 31) & 1)) & 0xffffffff;

for (var round:uint = 0; round < 8; round++)
{
var fval:uint;

work = (right << 28) | (right >>> 4);
work ^= wKey[round * 4 + 0];
fval = SP7[work & 0x3f];
fval |= SP5[(work >>> 8) & 0x3f];
fval |= SP3[(work >>> 16) & 0x3f];
fval |= SP1[(work >>> 24) & 0x3f];
work = right ^ wKey[round * 4 + 1];
fval |= SP8[work & 0x3f];
fval |= SP6[(work >>> 8) & 0x3f];
fval |= SP4[(work >>> 16) & 0x3f];
fval |= SP2[(work >>> 24) & 0x3f];
left ^= fval;
work = (left << 28) | (left >>> 4);
work ^= wKey[round * 4 + 2];
fval = SP7[work & 0x3f];
fval |= SP5[(work >>> 8) & 0x3f];
fval |= SP3[(work >>> 16) & 0x3f];
fval |= SP1[(work >>> 24) & 0x3f];
work = left ^ wKey[round * 4 + 3];
fval |= SP8[work & 0x3f];
fval |= SP6[(work >>> 8) & 0x3f];
fval |= SP4[(work >>> 16) & 0x3f];
fval |= SP2[(work >>> 24) & 0x3f];
right ^= fval;
}

right = (right << 31) | (right >>> 1);
work = (left ^ right) & 0xaaaaaaaa;
left ^= work;
right ^= work;
left = (left << 31) | (left >>> 1);
work = ((left >>> 8) ^ right) & 0x00ff00ff;
right ^= work;
left ^= (work << 8);
work = ((left >>> 2) ^ right) & 0x33333333;
right ^= work;
left ^= (work << 2);
work = ((right >>> 16) ^ left) & 0x0000ffff;
left ^= work;
right ^= (work << 16);
work = ((right >>> 4) ^ left) & 0x0f0f0f0f;
left ^= work;
right ^= (work << 4);

out[outOff + 0] = ((right >>> 24) & 0xff);
out[outOff + 1] = ((right >>> 16) & 0xff);
out[outOff + 2] = ((right >>> 8) & 0xff);
out[outOff + 3] = (right & 0xff);
out[outOff + 4] = ((left >>> 24) & 0xff);
out[outOff + 5] = ((left >>> 16) & 0xff);
out[outOff + 6] = ((left >>> 8) & 0xff);
out[outOff + 7] = (left & 0xff);
}

public function toString():String {
return "des";
}
}

C#代码：

public class DesKey
{
private static readonly uint[] Df_Key = { 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32,
0x10, 0x89, 0xab, 0xcd, 0xef, 0x01, 0x23, 0x45, 0x67 };

private static readonly uint[] bytebit = { 128, 64, 32, 16, 8, 4, 2, 1 };

private static readonly uint[] bigbyte = { 0x800000, 0x400000, 0x200000, 0x100000, 0x80000, 0x40000, 0x20000, 0x10000, 0x8000,
0x4000, 0x2000, 0x1000, 0x800, 0x400, 0x200, 0x100, 0x80, 0x40, 0x20, 0x10, 0x8, 0x4, 0x2, 0x1 };

private static readonly uint[] pc1 = { 56, 48, 40, 32, 24, 16, 8, 0, 57, 49, 41, 33, 25, 17, 9, 1, 58, 50, 42, 34, 26, 18, 10, 2,
59, 51, 43, 35, 62, 54, 46, 38, 30, 22, 14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 60, 52, 44, 36, 28, 20, 12,
4, 27, 19, 11, 3 };

private static readonly uint[] totrot = { 1, 2, 4, 6, 8, 10, 12, 14, 15, 17, 19, 21, 23, 25, 27, 28};

private static readonly uint[] pc2 ={ 13, 16, 10, 23, 0, 4, 2, 27, 14, 5, 20, 9, 22, 18, 11, 3, 25, 7, 15, 6, 26, 19, 12, 1, 40,
51, 30, 36, 46, 54, 29, 39, 50, 44, 32, 47, 43, 48, 38, 55, 33, 52, 45, 41, 49, 35, 28, 31};

private static readonly uint[] SP1 = { 0x01010400, 0x00000000, 0x00010000, 0x01010404, 0x01010004, 0x00010404, 0x00000004,
0x00010000, 0x00000400, 0x01010400, 0x01010404, 0x00000400, 0x01000404, 0x01010004, 0x01000000, 0x00000004,
0x00000404, 0x01000400, 0x01000400, 0x00010400, 0x00010400, 0x01010000, 0x01010000, 0x01000404, 0x00010004,
0x01000004, 0x01000004, 0x00010004, 0x00000000, 0x00000404, 0x00010404, 0x01000000, 0x00010000, 0x01010404,
0x00000004, 0x01010000, 0x01010400, 0x01000000, 0x01000000, 0x00000400, 0x01010004, 0x00010000, 0x00010400,
0x01000004, 0x00000400, 0x00000004, 0x01000404, 0x00010404, 0x01010404, 0x00010004, 0x01010000, 0x01000404,
0x01000004, 0x00000404, 0x00010404, 0x01010400, 0x00000404, 0x01000400, 0x01000400, 0x00000000, 0x00010004,
0x00010400, 0x00000000, 0x01010004 };

private static readonly uint[] SP2 = { 0x80108020, 0x80008000, 0x00008000, 0x00108020, 0x00100000, 0x00000020, 0x80100020,
0x80008020, 0x80000020, 0x80108020, 0x80108000, 0x80000000, 0x80008000, 0x00100000, 0x00000020, 0x80100020,
0x00108000, 0x00100020, 0x80008020, 0x00000000, 0x80000000, 0x00008000, 0x00108020, 0x80100000, 0x00100020,
0x80000020, 0x00000000, 0x00108000, 0x00008020, 0x80108000, 0x80100000, 0x00008020, 0x00000000, 0x00108020,
0x80100020, 0x00100000, 0x80008020, 0x80100000, 0x80108000, 0x00008000, 0x80100000, 0x80008000, 0x00000020,
0x80108020, 0x00108020, 0x00000020, 0x00008000, 0x80000000, 0x00008020, 0x80108000, 0x00100000, 0x80000020,
0x00100020, 0x80008020, 0x80000020, 0x00100020, 0x00108000, 0x00000000, 0x80008000, 0x00008020, 0x80000000,
0x80100020, 0x80108020, 0x00108000 };

private static readonly uint[] SP3 = { 0x00000208, 0x08020200, 0x00000000, 0x08020008, 0x08000200, 0x00000000, 0x00020208,
0x08000200, 0x00020008, 0x08000008, 0x08000008, 0x00020000, 0x08020208, 0x00020008, 0x08020000, 0x00000208,
0x08000000, 0x00000008, 0x08020200, 0x00000200, 0x00020200, 0x08020000, 0x08020008, 0x00020208, 0x08000208,
0x00020200, 0x00020000, 0x08000208, 0x00000008, 0x08020208, 0x00000200, 0x08000000, 0x08020200, 0x08000000,
0x00020008, 0x00000208, 0x00020000, 0x08020200, 0x08000200, 0x00000000, 0x00000200, 0x00020008, 0x08020208,
0x08000200, 0x08000008, 0x00000200, 0x00000000, 0x08020008, 0x08000208, 0x00020000, 0x08000000, 0x08020208,
0x00000008, 0x00020208, 0x00020200, 0x08000008, 0x08020000, 0x08000208, 0x00000208, 0x08020000, 0x00020208,
0x00000008, 0x08020008, 0x00020200 };

private static readonly uint[] SP4 = { 0x00802001, 0x00002081, 0x00002081, 0x00000080, 0x00802080, 0x00800081, 0x00800001,
0x00002001, 0x00000000, 0x00802000, 0x00802000, 0x00802081, 0x00000081, 0x00000000, 0x00800080, 0x00800001,
0x00000001, 0x00002000, 0x00800000, 0x00802001, 0x00000080, 0x00800000, 0x00002001, 0x00002080, 0x00800081,
0x00000001, 0x00002080, 0x00800080, 0x00002000, 0x00802080, 0x00802081, 0x00000081, 0x00800080, 0x00800001,
0x00802000, 0x00802081, 0x00000081, 0x00000000, 0x00000000, 0x00802000, 0x00002080, 0x00800080, 0x00800081,
0x00000001, 0x00802001, 0x00002081, 0x00002081, 0x00000080, 0x00802081, 0x00000081, 0x00000001, 0x00002000,
0x00800001, 0x00002001, 0x00802080, 0x00800081, 0x00002001, 0x00002080, 0x00800000, 0x00802001, 0x00000080,
0x00800000, 0x00002000, 0x00802080 };

private static readonly uint[] SP5 = { 0x00000100, 0x02080100, 0x02080000, 0x42000100, 0x00080000, 0x00000100, 0x40000000,
0x02080000, 0x40080100, 0x00080000, 0x02000100, 0x40080100, 0x42000100, 0x42080000, 0x00080100, 0x40000000,
0x02000000, 0x40080000, 0x40080000, 0x00000000, 0x40000100, 0x42080100, 0x42080100, 0x02000100, 0x42080000,
0x40000100, 0x00000000, 0x42000000, 0x02080100, 0x02000000, 0x42000000, 0x00080100, 0x00080000, 0x42000100,
0x00000100, 0x02000000, 0x40000000, 0x02080000, 0x42000100, 0x40080100, 0x02000100, 0x40000000, 0x42080000,
0x02080100, 0x40080100, 0x00000100, 0x02000000, 0x42080000, 0x42080100, 0x00080100, 0x42000000, 0x42080100,
0x02080000, 0x00000000, 0x40080000, 0x42000000, 0x00080100, 0x02000100, 0x40000100, 0x00080000, 0x00000000,
0x40080000, 0x02080100, 0x40000100 };

private static readonly uint[] SP6 = { 0x20000010, 0x20400000, 0x00004000, 0x20404010, 0x20400000, 0x00000010, 0x20404010,
0x00400000, 0x20004000, 0x00404010, 0x00400000, 0x20000010, 0x00400010, 0x20004000, 0x20000000, 0x00004010,
0x00000000, 0x00400010, 0x20004010, 0x00004000, 0x00404000, 0x20004010, 0x00000010, 0x20400010, 0x20400010,
0x00000000, 0x00404010, 0x20404000, 0x00004010, 0x00404000, 0x20404000, 0x20000000, 0x20004000, 0x00000010,
0x20400010, 0x00404000, 0x20404010, 0x00400000, 0x00004010, 0x20000010, 0x00400000, 0x20004000, 0x20000000,
0x00004010, 0x20000010, 0x20404010, 0x00404000, 0x20400000, 0x00404010, 0x20404000, 0x00000000, 0x20400010,
0x00000010, 0x00004000, 0x20400000, 0x00404010, 0x00004000, 0x00400010, 0x20004010, 0x00000000, 0x20404000,
0x20000000, 0x00400010, 0x20004010 };

private static readonly uint[] SP7 = { 0x00200000, 0x04200002, 0x04000802, 0x00000000, 0x00000800, 0x04000802, 0x00200802,
0x04200800, 0x04200802, 0x00200000, 0x00000000, 0x04000002, 0x00000002, 0x04000000, 0x04200002, 0x00000802,
0x04000800, 0x00200802, 0x00200002, 0x04000800, 0x04000002, 0x04200000, 0x04200800, 0x00200002, 0x04200000,
0x00000800, 0x00000802, 0x04200802, 0x00200800, 0x00000002, 0x04000000, 0x00200800, 0x04000000, 0x00200800,
0x00200000, 0x04000802, 0x04000802, 0x04200002, 0x04200002, 0x00000002, 0x00200002, 0x04000000, 0x04000800,
0x00200000, 0x04200800, 0x00000802, 0x00200802, 0x04200800, 0x00000802, 0x04000002, 0x04200802, 0x04200000,
0x00200800, 0x00000000, 0x00000002, 0x04200802, 0x00000000, 0x00200802, 0x04200000, 0x00000800, 0x04000002,
0x04000800, 0x00000800, 0x00200002};

private static readonly uint[] SP8 = { 0x10001040, 0x00001000, 0x00040000, 0x10041040, 0x10000000, 0x10001040, 0x00000040,
0x10000000, 0x00040040, 0x10040000, 0x10041040, 0x00041000, 0x10041000, 0x00041040, 0x00001000, 0x00000040,
0x10040000, 0x10000040, 0x10001000, 0x00001040, 0x00041000, 0x00040040, 0x10040040, 0x10041000, 0x00001040,
0x00000000, 0x00000000, 0x10040040, 0x10000040, 0x10001000, 0x00041040, 0x00040000, 0x00041040, 0x00040000,
0x10041000, 0x00001000, 0x00000040, 0x10040040, 0x00001000, 0x00041040, 0x10001000, 0x00000040, 0x10000040,
0x10040000, 0x10040040, 0x10000000, 0x00040000, 0x10001040, 0x00000000, 0x10041040, 0x00040040, 0x10000040,
0x10040000, 0x10001000, 0x10001040, 0x00000000, 0x10041040, 0x00041000, 0x00041000, 0x00001040, 0x00001040,
0x00040040, 0x10000000, 0x10041000 };

protected byte[] key;
protected uint[] encKey;
protected uint[] decKey;

public DesKey(byte[] key)
{
this.key = key;
this.encKey = generateWorkingKey(true, key, 0);
this.decKey = generateWorkingKey(false, key, 0);
}

public uint getBlockSize()
{
return 8;
}

public void dispose()
{
uint i = 0;
for (i=0;i<encKey.Length;i++) { encKey[i]=0; }
for (i=0;i<decKey.Length;i++) { decKey[i]=0; }
encKey=null;
decKey=null;
for (i=0;i<key.Length;i++) { key[i]=0; }
key = null;
}

public byte[] encrypt(byte[] block, uint index = 0)
{
if (block.Length % 8 != 0)
{
byte[] newBlock = new byte[(block.Length/8 + 1)*8];
for (int i = block.Length; i < newBlock.Length; ++i)
{
newBlock[i] = 0;
}
Array.Copy(block, newBlock, block.Length);
block = newBlock;
}
for(uint i = index; i < block.Length; i+=8)
{
desFunc(encKey, block, i, block, i);
}
return block;
}

public byte[] decrypt(byte[] block, uint index = 0)
{
if (block.Length % 8 != 0)
{
byte[] newBlock = new byte[(block.Length / 8 + 1) * 8];
for (int i = block.Length; i < newBlock.Length; ++i)
{
newBlock[i] = 0;
}
Array.Copy(block, newBlock, block.Length);
block = newBlock;
}
for (uint i = index; i < block.Length; i += 8)
{
desFunc(decKey, block, i, block, i);
}
return block;
}

/**
* generate an integer based working key based on our secret key and what we
* processing we are planning to do.
*
* Acknowledgements for this routine go to James Gillogly & Phil Karn.
*/
protected uint[] generateWorkingKey(bool encrypting, byte[] key, uint off)
{
uint[] newKey = new uint[32];
bool[] pc1m = new bool[56], pcr = new bool[56];

uint l;

for (uint j = 0; j < 56; j++)
{
l = pc1[j];

pc1m[j] = ((key[off + (l >> 3)] & bytebit[l & 07]) != 0);
}

for (uint i = 0; i < 16; i++)
{
uint m;
uint n;

if (encrypting)
{
m = i << 1;
}
else
{
m = (15 - i) << 1;
}

n = m + 1;
newKey[m] = newKey
= 0;

for (uint j = 0; j < 28; j++)
{
l = j + totrot[i];
if (l < 28)
{
pcr[j] = pc1m[l];
}
else
{
pcr[j] = pc1m[l - 28];
}
}

for (uint j = 28; j < 56; j++)
{
l = j + totrot[i];
if (l < 56)
{
pcr[j] = pc1m[l];
}
else
{
pcr[j] = pc1m[l - 28];
}
}

for (uint j = 0; j < 24; j++)
{
if (pcr[pc2[j]])
{
newKey[m] |= bigbyte[j];
}

if (pcr[pc2[j + 24]])
{
newKey
|= bigbyte[j];
}
}
}

//
// store the processed key
//
for (uint i = 0; i != 32; i += 2)
{
uint i1;
uint i2;

i1 = newKey[i];
i2 = newKey[i + 1];

newKey[i] = ((i1 & 0x00fc0000) << 6) | ((i1 & 0x00000fc0) << 10) | ((i2 & 0x00fc0000) >> 10)
| ((i2 & 0x00000fc0) >> 6);

newKey[i + 1] = ((i1 & 0x0003f000) << 12) | ((i1 & 0x0000003f) << 16) | ((i2 & 0x0003f000) >> 4)
| (i2 & 0x0000003f);
}
return newKey;
}

/**
* the DES engine.
*/
protected void desFunc(uint[] wKey, byte[] inp, uint inOff,byte[] outp, uint outOff)
{
uint work = 0;
uint right = 0;
uint left = 0;

//处理数组长度不够8的情况
int[] shiftOffset = { 24, 16, 8, 0, 24, 16, 8, 0};
for (int i = 0; i < 8; ++i)
{
if (inOff + i >= inp.Length)
break;

if (i < 4)
{
if (left == 0)
{
left = ((uint)inp[inOff + i] & 0xff) << shiftOffset[i];
}
else
{
left |= ((uint)inp[inOff + i] & 0xff) << shiftOffset[i];
}
}
else
{
if (right == 0)
{
right = ((uint)inp[inOff + i] & 0xff) << shiftOffset[i];
}
else
{
right |= ((uint)inp[inOff + i] & 0xff) << shiftOffset[i];
}
}
}

//老的代码
//left = ((uint)inp[inOff + 0] & 0xff) << 24;
//left |= ((uint)inp[inOff + 1] & 0xff) << 16;
//left |= ((uint)inp[inOff + 2] & 0xff) << 8;
//left |= ((uint)inp[inOff + 3] & 0xff);

//right = ((uint)inp[inOff + 4] & 0xff) << 24;
//right |= ((uint)inp[inOff + 5] & 0xff) << 16;
//right |= ((uint)inp[inOff + 6] & 0xff) << 8;
//right |= ((uint)inp[inOff + 7] & 0xff);

work = ((left >> 4) ^ right) & 0x0f0f0f0f;
right ^= work;
left ^= (work << 4);
work = ((left >> 16) ^ right) & 0x0000ffff;
right ^= work;
left ^= (work << 16);
work = ((right >> 2) ^ left) & 0x33333333;
left ^= work;
right ^= (work << 2);
work = ((right >> 8) ^ left) & 0x00ff00ff;
left ^= work;
right ^= (work << 8);
right = ((right << 1) | ((right >> 31) & 1)) & 0xffffffff;
work = (left ^ right) & 0xaaaaaaaa;
left ^= work;
right ^= work;
left = ((left << 1) | ((left >> 31) & 1)) & 0xffffffff;

for (uint round = 0; round < 8; round++)
{
uint fval;

work = (right << 28) | (right >> 4);
work ^= wKey[round * 4 + 0];
//work = work;
fval = SP7[work & 0x3f];
fval |= SP5[(work >> 8) & 0x3f];
fval |= SP3[(work >> 16) & 0x3f];
fval |= SP1[(work >> 24) & 0x3f];
work = right ^ wKey[round * 4 + 1];
fval |= SP8[work & 0x3f];
fval |= SP6[(work >> 8) & 0x3f];
fval |= SP4[(work >> 16) & 0x3f];
fval |= SP2[(work >> 24) & 0x3f];
left ^= fval;
work = (left << 28) | (left >> 4);
work ^= wKey[round * 4 + 2];
fval = SP7[work & 0x3f];
fval |= SP5[(work >> 8) & 0x3f];
fval |= SP3[(work >> 16) & 0x3f];
fval |= SP1[(work >> 24) & 0x3f];
work = left ^ wKey[round * 4 + 3];
fval |= SP8[work & 0x3f];
fval |= SP6[(work >> 8) & 0x3f];
fval |= SP4[(work >> 16) & 0x3f];
fval |= SP2[(work >> 24) & 0x3f];
right ^= fval;
}

right = (right << 31) | (right >> 1);
work = (left ^ right) & 0xaaaaaaaa;
left ^= work;
right ^= work;
left = (left << 31) | (left >> 1);
work = ((left >> 8) ^ right) & 0x00ff00ff;
right ^= work;
left ^= (work << 8);
work = ((left >> 2) ^ right) & 0x33333333;
right ^= work;
left ^= (work << 2);
work = ((right >> 16) ^ left) & 0x0000ffff;
left ^= work;
right ^= (work << 16);
work = ((right >> 4) ^ left) & 0x0f0f0f0f;
left ^= work;
right ^= (work << 4);

//处理数组长度不够8的情况
for (uint i = 0; i < 8; ++i)
{
if (outOff + i >= outp.Length)
break;
if (i < 4)
{
outp[outOff + i] = (byte)((right >> shiftOffset[i]) & 0xff);
}
else
{
outp[outOff + i] = (byte)((left >> shiftOffset[i]) & 0xff);
}

}

//outp[outOff + 0] = (byte)((right >> 24) & 0xff);
//outp[outOff + 1] = (byte)((right >> 16) & 0xff);
//outp[outOff + 2] = (byte)((right >> 8) & 0xff);
//outp[outOff + 3] = (byte)(right & 0xff);
//outp[outOff + 4] = (byte)((left >> 24) & 0xff);
//outp[outOff + 5] = (byte)((left >> 16) & 0xff);
//outp[outOff + 6] = (byte)((left >> 8) & 0xff);
//outp[outOff + 7] = (byte)(left & 0xff);
}

public string toString() {
return "des";
}
}