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

   1 package com.easysw.cups;
   2
   3 /**
   4  * @version 1.00 06-NOV-2002
   5  * @author  Apple Inc.
   6  *
   7  *   Internet Printing Protocol definitions for the Common UNIX Printing
   8  *   System (CUPS).
   9  *
  10  *   Copyright 2007 by Apple Inc.
  11  *   Copyright 1997-2002 by Easy Software Products.
  12  *
  13  *   These coded instructions, statements, and computer programs are the
  14  *   property of Apple Inc. and are protected by Federal copyright
  15  *   law.  Distribution and use rights are outlined in the file "LICENSE.txt"
  16  *   which should have been included with this file.  If this file is
  17  *   file is missing or damaged, see the license at "http://www.cups.org/".
  18  */
  19
  20 /**
  21  * Digest MD5 password routines.
  22  *
  23  * @author      TDB
  24  * @version     1.0
  25  * @since       JDK1.3
  26  */
  27 import java.security.*;
  28
  29 public class IPPMD5
  30 {
  31   public MessageDigest        md       = null;
  32   static private IPPMD5       md5      = null;
  33   private static final char[] hexChars = {'0','1','2','3','4','5','6','7',
  34                                           '8','9','a','b','c','d','e','f'};
  35
  36   /**
  37    * Constructor is private so you must use the getInstance method
  38    */
  39   private IPPMD5() throws NoSuchAlgorithmException
  40   {
  41     md = MessageDigest.getInstance("MD5");
  42   }
  43
  44
  45   /**
  46    * This returns the singleton instance
  47    */
  48   public static IPPMD5 getInstance() throws NoSuchAlgorithmException
  49   {
  50
  51     if (md5 == null)
  52     {
  53       md5 = new IPPMD5();
  54     }
  55     return (md5);
  56   }
  57
  58
  59   public String hashData(byte[] dataToHash)
  60   {
  61     return(hexStringFromBytes((calculateHash(dataToHash))));
  62   }
  63
  64
  65   private byte[] calculateHash(byte[] dataToHash)
  66   {
  67     md.update(dataToHash, 0, dataToHash.length);
  68     return(md.digest());
  69   }
  70
  71
  72   public String hexStringFromBytes(byte[] b)
  73   {
  74     String hex = "";
  75     int msb;
  76     int lsb = 0;
  77     int i;
  78
  79     // MSB maps to idx 0
  80     for (i = 0; i < b.length; i++)
  81     {
  82       msb = ((int)b[i] & 0x000000FF) / 16;
  83       lsb = ((int)b[i] & 0x000000FF) % 16;
  84       // System.out.println("I: " + i + "  B: " + b[i] + " MSB: " +
  85       //                    msb + " LSB: " + lsb );
  86       hex = hex + hexChars[msb] + hexChars[lsb];
  87     }
  88     return(hex);
  89   }
  90
  91
  92
  93
  94
  95   public String MD5Digest( String user, String passwd, String realm,
  96                            String method, String resource, String nonce )
  97   {
  98     String tmp;
  99     String A1, A2;
 100     String auth_string = "";
 101
 102     try
 103     {
 104       tmp = user + ":" + realm + ":" + passwd;
 105       md = MessageDigest.getInstance("MD5");
 106       A1 = hexStringFromBytes(md.digest(tmp.getBytes()));
 107
 108       tmp = method + ":" + resource;
 109       md = MessageDigest.getInstance("MD5");
 110       A2 = hexStringFromBytes(md.digest(tmp.getBytes()));
 111
 112       tmp = A1 + ":" + nonce + ":" + A2;
 113       md = MessageDigest.getInstance("MD5");
 114       auth_string = hexStringFromBytes(md.digest(tmp.getBytes()));
 115       return(auth_string);
 116     }
 117     catch (NoSuchAlgorithmException e)
 118     {
 119     }
 120     return("");
 121
 122   }
 123
 124
 125 }