scripting/java/src/com/easysw/cups/IPPMD5.java

   1 package com.easysw.cups;
   2
   3 /**
   4  * @version 1.00 06-NOV-2002
   5  * @author  Easy Software Products
   6  *
   7  *   Internet Printing Protocol definitions for the Common UNIX Printing
   8  *   System (CUPS).
   9  *
  10  *   Copyright 1997-2002 by Easy Software Products.
  11  *
  12  *   These coded instructions, statements, and computer programs are the
  13  *   property of Easy Software Products and are protected by Federal
  14  *   copyright law.  Distribution and use rights are outlined in the file
  15  *   "LICENSE.txt" which should have been included with this file.  If this
  16  *   file is missing or damaged please contact Easy Software Products
  17  *   at:
  18  *
  19  *       Attn: CUPS Licensing Information
  20  *       Easy Software Products
  21  *       44141 Airport View Drive, Suite 204
  22  *       Hollywood, Maryland 20636-3111 USA
  23  *
  24  *       Voice: (301) 373-9603
  25  *       EMail: cups-info@cups.org
  26  *         WWW: http://www.cups.org
  27  */
  28
  29 /**
  30  * Digest MD5 password routines.
  31  *
  32  * @author      TDB
  33  * @version     1.0
  34  * @since       JDK1.3
  35  */
  36 import java.security.*;
  37
  38 public class IPPMD5
  39 {
  40   public MessageDigest        md       = null;
  41   static private IPPMD5       md5      = null;
  42   private static final char[] hexChars = {'0','1','2','3','4','5','6','7',
  43                                           '8','9','a','b','c','d','e','f'};
  44
  45   /**
  46    * Constructor is private so you must use the getInstance method
  47    */
  48   private IPPMD5() throws NoSuchAlgorithmException
  49   {
  50     md = MessageDigest.getInstance("MD5");
  51   }
  52
  53
  54   /**
  55    * This returns the singleton instance
  56    */
  57   public static IPPMD5 getInstance() throws NoSuchAlgorithmException
  58   {
  59
  60     if (md5 == null)
  61     {
  62       md5 = new IPPMD5();
  63     }
  64     return (md5);
  65   }
  66
  67
  68   public String hashData(byte[] dataToHash)
  69   {
  70     return(hexStringFromBytes((calculateHash(dataToHash))));
  71   }
  72
  73
  74   private byte[] calculateHash(byte[] dataToHash)
  75   {
  76     md.update(dataToHash, 0, dataToHash.length);
  77     return(md.digest());
  78   }
  79
  80
  81   public String hexStringFromBytes(byte[] b)
  82   {
  83     String hex = "";
  84     int msb;
  85     int lsb = 0;
  86     int i;
  87
  88     // MSB maps to idx 0
  89     for (i = 0; i < b.length; i++)
  90     {
  91       msb = ((int)b[i] & 0x000000FF) / 16;
  92       lsb = ((int)b[i] & 0x000000FF) % 16;
  93       // System.out.println("I: " + i + "  B: " + b[i] + " MSB: " +
  94       //                    msb + " LSB: " + lsb );
  95       hex = hex + hexChars[msb] + hexChars[lsb];
  96     }
  97     return(hex);
  98   }
  99
 100
 101
 102
 103
 104   public String MD5Digest( String user, String passwd, String realm,
 105                            String method, String resource, String nonce )
 106   {
 107     String tmp;
 108     String A1, A2;
 109     String auth_string = "";
 110
 111     try
 112     {
 113       tmp = user + ":" + realm + ":" + passwd;
 114       md = MessageDigest.getInstance("MD5");
 115       A1 = hexStringFromBytes(md.digest(tmp.getBytes()));
 116
 117       tmp = method + ":" + resource;
 118       md = MessageDigest.getInstance("MD5");
 119       A2 = hexStringFromBytes(md.digest(tmp.getBytes()));
 120
 121       tmp = A1 + ":" + nonce + ":" + A2;
 122       md = MessageDigest.getInstance("MD5");
 123       auth_string = hexStringFromBytes(md.digest(tmp.getBytes()));
 124       return(auth_string);
 125     }
 126     catch (NoSuchAlgorithmException e)
 127     {
 128     }
 129     return("");
 130
 131   }
 132
 133
 134 }