des.java

面向应用的智能安全代理平台和工具包是一个综合网络应用的安全共性需求而设计和实现的一个通用性的网络信息安全应用支撑平台

package au.net.aba.crypto.provider;

/*
 * $Id: DES.java,v 1.15 1999/01/18 05:01:39 leachbj Exp $
 * $Author: leachbj $
 *
 * Copyright (C) 1996-1998 Australian Business Access Pty Ltd.
 * All rights reserved.
 * 
 * Use, modification, copying and distribution of this software is subject the
 * terms and conditions of the ABA Public Licence. See the file
 * "PUBLIC_LICENCE" for additional information.
 *
 * If you have not received a copy of the Public Licence, you must destroy all
 * copies of this file immediately. 
 *
 * $Source: /aba/CVSROOT/jdk1.1/src/au.net.aba/crypto/provider/DES.java,v $
 * $Revision: 1.15 $
 * $Date: 1999/01/18 05:01:39 $
 * $State: Exp $
 */

import java.security.*;

import java.security.*;
import java.security.spec.*;
import au.net.aba.crypto.spec.*;

import javax.crypto.*;
import javax.crypto.spec.*;

/**
 * A class that provides DES encryption.
 */
public class DES extends BlockCipher
{
	public final static String ident = "$Id: DES.java,v 1.15 1999/01/18 05:01:39 leachbj Exp $";

	protected int[] work;	/* working buffer */
	protected int[] Kn1;

	/**
	 * what follows is largely taken from "Applied Cryptography", by
	 * Bruce Schneier. It also bears great resemblance to Richard
	 * Outerbridge's D3DES...
	 */

	static short[]	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
		};

	static short[]	bytebit =
		{
			0200, 0100, 040, 020, 010, 04, 02, 01
		};

	static int[]	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
		};

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

	static byte[]	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
		};

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

	static char[] 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
		};

	static int[] 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
	};

	static int[] 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
	};

	static int[] 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
	};

	static int[] 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
	};

	static int[] 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
	};

	static int[] 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
	};

	static int[] 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
	};

	static int[] 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
	};

	//==================================
	// Constructors
	//==================================

	public DES()
	{
		work = new int[2];
		Kn1 = new int[32];
	}
	protected int decryptBlock(
		byte[] in,
		int inOff,
		int len,
		byte[] out,
		int outOff)
	throws BadPaddingException
	{