helper.java

这是个JAVA开发的WEB邮箱

/* CVS ID: $Id: Helper.java,v 1.5 2000/09/13 10:35:03 wastl Exp $ */
package net.wastl.webmail.misc;

import javax.mail.*;
import java.net.*;
import java.math.*;
import java.util.*;
import gnu.regexp.*;
import net.wastl.webmail.server.http.HTTPRequestHeader;

/*
 * Helper.java
 *
 * Created: Tue Sep  7 13:03:44 1999
 *
 * Copyright (C) 1999-2000 Sebastian Schaffert
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
/**
 * Miscellaneous helper routines.
 *
 * Created: Tue Sep  7 13:03:44 1999
 *
 * @author Sebastian Schaffert
 * @version
 */

public class Helper  {
    
    public Helper() {
	
    }



   private static final int ITERATIONS = 16;

   private static final int con_salt[] =
   {
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 
      0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 
      0x0A, 0x0B, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 
      0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 
      0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 
      0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, 0x22, 
      0x23, 0x24, 0x25, 0x20, 0x21, 0x22, 0x23, 0x24, 
      0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 
      0x2D, 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 
      0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, 
      0x3D, 0x3E, 0x3F, 0x00, 0x00, 0x00, 0x00, 0x00, 
   };

   private static final boolean shifts2[] =
   {
      false, false, true, true, true, true, true, true,
      false, true,  true, true, true, true, true, false
   };

   private static final int skb[][] =
   {
      {
         /* for C bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
         0x00000000, 0x00000010, 0x20000000, 0x20000010, 
         0x00010000, 0x00010010, 0x20010000, 0x20010010, 
         0x00000800, 0x00000810, 0x20000800, 0x20000810, 
         0x00010800, 0x00010810, 0x20010800, 0x20010810, 
         0x00000020, 0x00000030, 0x20000020, 0x20000030, 
         0x00010020, 0x00010030, 0x20010020, 0x20010030, 
         0x00000820, 0x00000830, 0x20000820, 0x20000830, 
         0x00010820, 0x00010830, 0x20010820, 0x20010830, 
         0x00080000, 0x00080010, 0x20080000, 0x20080010, 
         0x00090000, 0x00090010, 0x20090000, 0x20090010, 
         0x00080800, 0x00080810, 0x20080800, 0x20080810, 
         0x00090800, 0x00090810, 0x20090800, 0x20090810, 
         0x00080020, 0x00080030, 0x20080020, 0x20080030, 
         0x00090020, 0x00090030, 0x20090020, 0x20090030, 
         0x00080820, 0x00080830, 0x20080820, 0x20080830, 
         0x00090820, 0x00090830, 0x20090820, 0x20090830, 
      },
      {
         /* for C bits (numbered as per FIPS 46) 7 8 10 11 12 13 */
         0x00000000, 0x02000000, 0x00002000, 0x02002000, 
         0x00200000, 0x02200000, 0x00202000, 0x02202000, 
         0x00000004, 0x02000004, 0x00002004, 0x02002004, 
         0x00200004, 0x02200004, 0x00202004, 0x02202004, 
         0x00000400, 0x02000400, 0x00002400, 0x02002400, 
         0x00200400, 0x02200400, 0x00202400, 0x02202400, 
         0x00000404, 0x02000404, 0x00002404, 0x02002404, 
         0x00200404, 0x02200404, 0x00202404, 0x02202404, 
         0x10000000, 0x12000000, 0x10002000, 0x12002000, 
         0x10200000, 0x12200000, 0x10202000, 0x12202000, 
         0x10000004, 0x12000004, 0x10002004, 0x12002004, 
         0x10200004, 0x12200004, 0x10202004, 0x12202004, 
         0x10000400, 0x12000400, 0x10002400, 0x12002400, 
         0x10200400, 0x12200400, 0x10202400, 0x12202400, 
         0x10000404, 0x12000404, 0x10002404, 0x12002404, 
         0x10200404, 0x12200404, 0x10202404, 0x12202404, 
      },
      {
         /* for C bits (numbered as per FIPS 46) 14 15 16 17 19 20 */
         0x00000000, 0x00000001, 0x00040000, 0x00040001, 
         0x01000000, 0x01000001, 0x01040000, 0x01040001, 
         0x00000002, 0x00000003, 0x00040002, 0x00040003, 
         0x01000002, 0x01000003, 0x01040002, 0x01040003, 
         0x00000200, 0x00000201, 0x00040200, 0x00040201, 
         0x01000200, 0x01000201, 0x01040200, 0x01040201, 
         0x00000202, 0x00000203, 0x00040202, 0x00040203, 
         0x01000202, 0x01000203, 0x01040202, 0x01040203, 
         0x08000000, 0x08000001, 0x08040000, 0x08040001, 
         0x09000000, 0x09000001, 0x09040000, 0x09040001, 
         0x08000002, 0x08000003, 0x08040002, 0x08040003, 
         0x09000002, 0x09000003, 0x09040002, 0x09040003, 
         0x08000200, 0x08000201, 0x08040200, 0x08040201, 
         0x09000200, 0x09000201, 0x09040200, 0x09040201, 
         0x08000202, 0x08000203, 0x08040202, 0x08040203, 
         0x09000202, 0x09000203, 0x09040202, 0x09040203, 
      },
      {
         /* for C bits (numbered as per FIPS 46) 21 23 24 26 27 28 */
         0x00000000, 0x00100000, 0x00000100, 0x00100100, 
         0x00000008, 0x00100008, 0x00000108, 0x00100108, 
         0x00001000, 0x00101000, 0x00001100, 0x00101100, 
         0x00001008, 0x00101008, 0x00001108, 0x00101108, 
         0x04000000, 0x04100000, 0x04000100, 0x04100100, 
         0x04000008, 0x04100008, 0x04000108, 0x04100108, 
         0x04001000, 0x04101000, 0x04001100, 0x04101100, 
         0x04001008, 0x04101008, 0x04001108, 0x04101108, 
         0x00020000, 0x00120000, 0x00020100, 0x00120100, 
         0x00020008, 0x00120008, 0x00020108, 0x00120108, 
         0x00021000, 0x00121000, 0x00021100, 0x00121100, 
         0x00021008, 0x00121008, 0x00021108, 0x00121108, 
         0x04020000, 0x04120000, 0x04020100, 0x04120100, 
         0x04020008, 0x04120008, 0x04020108, 0x04120108, 
         0x04021000, 0x04121000, 0x04021100, 0x04121100, 
         0x04021008, 0x04121008, 0x04021108, 0x04121108, 
      },
      {
         /* for D bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
         0x00000000, 0x10000000, 0x00010000, 0x10010000, 
         0x00000004, 0x10000004, 0x00010004, 0x10010004, 
         0x20000000, 0x30000000, 0x20010000, 0x30010000, 
         0x20000004, 0x30000004, 0x20010004, 0x30010004, 
         0x00100000, 0x10100000, 0x00110000, 0x10110000, 
         0x00100004, 0x10100004, 0x00110004, 0x10110004, 
         0x20100000, 0x30100000, 0x20110000, 0x30110000, 
         0x20100004, 0x30100004, 0x20110004, 0x30110004, 
         0x00001000, 0x10001000, 0x00011000, 0x10011000, 
         0x00001004, 0x10001004, 0x00011004, 0x10011004, 
         0x20001000, 0x30001000, 0x20011000, 0x30011000, 
         0x20001004, 0x30001004, 0x20011004, 0x30011004, 
         0x00101000, 0x10101000, 0x00111000, 0x10111000, 
         0x00101004, 0x10101004, 0x00111004, 0x10111004, 
         0x20101000, 0x30101000, 0x20111000, 0x30111000, 
         0x20101004, 0x30101004, 0x20111004, 0x30111004, 
      },
      {
         /* for D bits (numbered as per FIPS 46) 8 9 11 12 13 14 */
         0x00000000, 0x08000000, 0x00000008, 0x08000008, 
         0x00000400, 0x08000400, 0x00000408, 0x08000408, 
         0x00020000, 0x08020000, 0x00020008, 0x08020008, 
         0x00020400, 0x08020400, 0x00020408, 0x08020408, 
         0x00000001, 0x08000001, 0x00000009, 0x08000009, 
         0x00000401, 0x08000401, 0x00000409, 0x08000409, 
         0x00020001, 0x08020001, 0x00020009, 0x08020009, 
         0x00020401, 0x08020401, 0x00020409, 0x08020409, 
         0x02000000, 0x0A000000, 0x02000008, 0x0A000008, 
         0x02000400, 0x0A000400, 0x02000408, 0x0A000408, 
         0x02020000, 0x0A020000, 0x02020008, 0x0A020008, 
         0x02020400, 0x0A020400, 0x02020408, 0x0A020408, 
         0x02000001, 0x0A000001, 0x02000009, 0x0A000009, 
         0x02000401, 0x0A000401, 0x02000409, 0x0A000409, 
         0x02020001, 0x0A020001, 0x02020009, 0x0A020009, 
         0x02020401, 0x0A020401, 0x02020409, 0x0A020409, 
      },
      {
         /* for D bits (numbered as per FIPS 46) 16 17 18 19 20 21 */
         0x00000000, 0x00000100, 0x00080000, 0x00080100, 
         0x01000000, 0x01000100, 0x01080000, 0x01080100, 
         0x00000010, 0x00000110, 0x00080010, 0x00080110, 
         0x01000010, 0x01000110, 0x01080010, 0x01080110, 
         0x00200000, 0x00200100, 0x00280000, 0x00280100, 
         0x01200000, 0x01200100, 0x01280000, 0x01280100, 
         0x00200010, 0x00200110, 0x00280010, 0x00280110, 
         0x01200010, 0x01200110, 0x01280010, 0x01280110, 
         0x00000200, 0x00000300, 0x00080200, 0x00080300, 
         0x01000200, 0x01000300, 0x01080200, 0x01080300, 
         0x00000210, 0x00000310, 0x00080210, 0x00080310, 
         0x01000210, 0x01000310, 0x01080210, 0x01080310, 
         0x00200200, 0x00200300, 0x00280200, 0x00280300, 
         0x01200200, 0x01200300, 0x01280200, 0x01280300, 
         0x00200210, 0x00200310, 0x00280210, 0x00280310, 
         0x01200210, 0x01200310, 0x01280210, 0x01280310, 
      },
      {
         /* for D bits (numbered as per FIPS 46) 22 23 24 25 27 28 */
         0x00000000, 0x04000000, 0x00040000, 0x04040000, 
         0x00000002, 0x04000002, 0x00040002, 0x04040002, 
         0x00002000, 0x04002000, 0x00042000, 0x04042000, 
         0x00002002, 0x04002002, 0x00042002, 0x04042002, 
         0x00000020, 0x04000020, 0x00040020, 0x04040020, 
         0x00000022, 0x04000022, 0x00040022, 0x04040022, 
         0x00002020, 0x04002020, 0x00042020, 0x04042020, 
         0x00002022, 0x04002022, 0x00042022, 0x04042022, 
         0x00000800, 0x04000800, 0x00040800, 0x04040800, 
         0x00000802, 0x04000802, 0x00040802, 0x04040802, 
         0x00002800, 0x04002800, 0x00042800, 0x04042800, 
         0x00002802, 0x04002802, 0x00042802, 0x04042802, 
         0x00000820, 0x04000820, 0x00040820, 0x04040820, 
         0x00000822, 0x04000822, 0x00040822, 0x04040822, 
         0x00002820, 0x04002820, 0x00042820, 0x04042820, 
         0x00002822, 0x04002822, 0x00042822, 0x04042822, 
      },
   };

   private static final int SPtrans[][] =
   {
      {
         /* nibble 0 */
         0x00820200, 0x00020000, 0x80800000, 0x80820200,
         0x00800000, 0x80020200, 0x80020000, 0x80800000,
         0x80020200, 0x00820200, 0x00820000, 0x80000200,
         0x80800200, 0x00800000, 0x00000000, 0x80020000,
         0x00020000, 0x80000000, 0x00800200, 0x00020200,
         0x80820200, 0x00820000, 0x80000200, 0x00800200,
         0x80000000, 0x00000200, 0x00020200, 0x80820000,
         0x00000200, 0x80800200, 0x80820000, 0x00000000,
         0x00000000, 0x80820200, 0x00800200, 0x80020000,
         0x00820200, 0x00020000, 0x80000200, 0x00800200,
         0x80820000, 0x00000200, 0x00020200, 0x80800000,
         0x80020200, 0x80000000, 0x80800000, 0x00820000,
         0x80820200, 0x00020200, 0x00820000, 0x80800200,
         0x00800000, 0x80000200, 0x80020000, 0x00000000,
         0x00020000, 0x00800000, 0x80800200, 0x00820200,
         0x80000000, 0x80820000, 0x00000200, 0x80020200,
      },
      {
         /* nibble 1 */
         0x10042004, 0x00000000, 0x00042000, 0x10040000,
         0x10000004, 0x00002004, 0x10002000, 0x00042000,
         0x00002000, 0x10040004, 0x00000004, 0x10002000,
         0x00040004, 0x10042000, 0x10040000, 0x00000004,
         0x00040000, 0x10002004, 0x10040004, 0x00002000,
         0x00042004, 0x10000000, 0x00000000, 0x00040004,
         0x10002004, 0x00042004, 0x10042000, 0x10000004,
         0x10000000, 0x00040000, 0x00002004, 0x10042004,
         0x00040004, 0x10042000, 0x10002000, 0x00042004,
         0x10042004, 0x00040004, 0x10000004, 0x00000000,
         0x10000000, 0x00002004, 0x00040000, 0x10040004,
         0x00002000, 0x10000000, 0x00042004, 0x10002004,
         0x10042000, 0x00002000, 0x00000000, 0x10000004,
         0x00000004, 0x10042004, 0x00042000, 0x10040000,
         0x10040004, 0x00040000, 0x00002004, 0x10002000,
         0x10002004, 0x00000004, 0x10040000, 0x00042000,
      },
      {
         /* nibble 2 */
         0x41000000, 0x01010040, 0x00000040, 0x41000040,
         0x40010000, 0x01000000, 0x41000040, 0x00010040,
         0x01000040, 0x00010000, 0x01010000, 0x40000000,
         0x41010040, 0x40000040, 0x40000000, 0x41010000,
         0x00000000, 0x40010000, 0x01010040, 0x00000040,
         0x40000040, 0x41010040, 0x00010000, 0x41000000,
         0x41010000, 0x01000040, 0x40010040, 0x01010000,
         0x00010040, 0x00000000, 0x01000000, 0x40010040,
         0x01010040, 0x00000040, 0x40000000, 0x00010000,
         0x40000040, 0x40010000, 0x01010000, 0x41000040,
         0x00000000, 0x01010040, 0x00010040, 0x41010000,
         0x40010000, 0x01000000, 0x41010040, 0x40000000,
         0x40010040, 0x41000000, 0x01000000, 0x41010040,
         0x00010000, 0x01000040, 0x41000040, 0x00010040,
         0x01000040, 0x00000000, 0x41010000, 0x40000040,
         0x41000000, 0x40010040, 0x00000040, 0x01010000,
      },
      {
         /* nibble 3 */
         0x00100402, 0x04000400, 0x00000002, 0x04100402,
         0x00000000, 0x04100000, 0x04000402, 0x00100002,
         0x04100400, 0x04000002, 0x04000000, 0x00000402,
         0x04000002, 0x00100402, 0x00100000, 0x04000000,
         0x04100002, 0x00100400, 0x00000400, 0x00000002,
         0x00100400, 0x04000402, 0x04100000, 0x00000400,
         0x00000402, 0x00000000, 0x00100002, 0x04100400,
         0x04000400, 0x04100002, 0x04100402, 0x00100000,
         0x04100002, 0x00000402, 0x00100000, 0x04000002,
         0x00100400, 0x04000400, 0x00000002, 0x04100000,
         0x04000402, 0x00000000, 0x00000400, 0x00100002,
         0x00000000, 0x04100002, 0x04100400, 0x00000400,
         0x04000000, 0x04100402, 0x00100402, 0x00100000,
         0x04100402, 0x00000002, 0x04000400, 0x00100402,
         0x00100002, 0x00100400, 0x04100000, 0x04000402,
         0x00000402, 0x04000000, 0x04000002, 0x04100400,
      },
      {
         /* nibble 4 */
         0x02000000, 0x00004000, 0x00000100, 0x02004108,
         0x02004008, 0x02000100, 0x00004108, 0x02004000,
         0x00004000, 0x00000008, 0x02000008, 0x00004100,
         0x02000108, 0x02004008, 0x02004100, 0x00000000,
         0x00004100, 0x02000000, 0x00004008, 0x00000108,
         0x02000100, 0x00004108, 0x00000000, 0x02000008,
         0x00000008, 0x02000108, 0x02004108, 0x00004008,
         0x02004000, 0x00000100, 0x00000108, 0x02004100,
         0x02004100, 0x02000108, 0x00004008, 0x02004000,
         0x00004000, 0x00000008, 0x02000008, 0x02000100,
         0x02000000, 0x00004100, 0x02004108, 0x00000000,
         0x00004108, 0x02000000, 0x00000100, 0x00004008,
         0x02000108, 0x00000100, 0x00000000, 0x02004108,
         0x02004008, 0x02004100, 0x00000108, 0x00004000,
         0x00004100, 0x02004008, 0x02000100, 0x00000108,
         0x00000008, 0x00004108, 0x02004000, 0x02000008,
      },
      {
         /* nibble 5 */
         0x20000010, 0x00080010, 0x00000000, 0x20080800,
         0x00080010, 0x00000800, 0x20000810, 0x00080000,
         0x00000810, 0x20080810, 0x00080800, 0x20000000,
         0x20000800, 0x20000010, 0x20080000, 0x00080810,
         0x00080000, 0x20000810, 0x20080010, 0x00000000,
         0x00000800, 0x00000010, 0x20080800, 0x20080010,
         0x20080810, 0x20080000, 0x20000000, 0x00000810,
         0x00000010, 0x00080800, 0x00080810, 0x20000800,
         0x00000810, 0x20000000, 0x20000800, 0x00080810,
         0x20080800, 0x00080010, 0x00000000, 0x20000800,
         0x20000000, 0x00000800, 0x20080010, 0x00080000,
         0x00080010, 0x20080810, 0x00080800, 0x00000010,
         0x20080810, 0x00080800, 0x00080000, 0x20000810,
         0x20000010, 0x20080000, 0x00080810, 0x00000000,
         0x00000800, 0x20000010, 0x20000810, 0x20080800,
         0x20080000, 0x00000810, 0x00000010, 0x20080010,
      },
      {
         /* nibble 6 */
         0x00001000, 0x00000080, 0x00400080, 0x00400001,
         0x00401081, 0x00001001, 0x00001080, 0x00000000,
         0x00400000, 0x00400081, 0x00000081, 0x00401000,
         0x00000001, 0x00401080, 0x00401000, 0x00000081,
         0x00400081, 0x00001000, 0x00001001, 0x00401081,
         0x00000000, 0x00400080, 0x00400001, 0x00001080,
         0x00401001, 0x00001081, 0x00401080, 0x00000001,
         0x00001081, 0x00401001, 0x00000080, 0x00400000,
         0x00001081, 0x00401000, 0x00401001, 0x00000081,
         0x00001000, 0x00000080, 0x00400000, 0x00401001,
         0x00400081, 0x00001081, 0x00001080, 0x00000000,
         0x00000080, 0x00400001, 0x00000001, 0x00400080,
         0x00000000, 0x00400081, 0x00400080, 0x00001080,
         0x00000081, 0x00001000, 0x00401081, 0x00400000,
         0x00401080, 0x00000001, 0x00001001, 0x00401081,
         0x00400001, 0x00401080, 0x00401000, 0x00001001,
      },
      {
         /* nibble 7 */
         0x08200020, 0x08208000, 0x00008020, 0x00000000,
         0x08008000, 0x00200020, 0x08200000, 0x08208020,
         0x00000020, 0x08000000, 0x00208000, 0x00008020,
         0x00208020, 0x08008020, 0x08000020, 0x08200000,
         0x00008000, 0x00208020, 0x00200020, 0x08008000,
         0x08208020, 0x08000020, 0x00000000, 0x00208000,
         0x08000000, 0x00200000, 0x08008020, 0x08200020,
         0x00200000, 0x00008000, 0x08208000, 0x00000020,
         0x00200000, 0x00008000, 0x08000020, 0x08208020,
         0x00008020, 0x08000000, 0x00000000, 0x00208000,
         0x08200020, 0x08008020, 0x08008000, 0x00200020,
         0x08208000, 0x00000020, 0x00200020, 0x08008000,
         0x08208020, 0x00200000, 0x08200000, 0x08000020,
         0x00208000, 0x00008020, 0x08008020, 0x08200000,
         0x00000020, 0x08208000, 0x00208020, 0x00000000,
         0x08000000, 0x08200020, 0x00008000, 0x00208020
      }
   };

   private static final int cov_2char[] =
   {
      0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 
      0x36, 0x37, 0x38, 0x39, 0x41, 0x42, 0x43, 0x44, 
      0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C, 
      0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, 0x54, 
      0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x61, 0x62, 
      0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 
      0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 
      0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A
   };

   private static final int byteToUnsigned(byte b)
   {
      int value = (int)b;

      return(value >= 0 ? value : value + 256);
   }