de.avetana.bluetooth.obex
Class MD5

java.lang.Object
  de.avetana.bluetooth.obex.MD5

public class MD5

extends java.lang.Object

Copyright (C) 2000 by Robert Hubley. * All rights reserved. * * This software is provided ``AS IS'' and any express or implied * warranties, including, but not limited to, the implied warranties of * merchantability and fitness for a particular purpose, are disclaimed. * In no event shall the authors be liable for any direct, indirect, * incidental, special, exemplary, or consequential damages (including, but * not limited to, procurement of substitute goods or services; loss of use, * data, or profits; or business interruption) however caused and on any * theory of liability, whether in contract, strict liability, or tort * (including negligence or otherwise) arising in any way out of the use of * this software, even if advised of the possibility of such damage. * * CLASS: MD5 DESCRIPTION: This is a class which encapsulates a set of MD5 Message Digest functions. MD5 algorithm produces a 128 bit digital fingerprint (signature) from an dataset of arbitrary length. For details see RFC 1321 (summarized below). This implementation is derived from the RSA Data Security, Inc. MD5 Message-Digest algorithm reference implementation (originally written in C) AUTHOR: Robert M. Hubley 1/2000 NOTES: Network Working Group R. Rivest Request for Comments: 1321 MIT Laboratory for Computer Science and RSA Data Security, Inc. April 1992 The MD5 Message-Digest Algorithm Summary This document describes the MD5 message-digest algorithm. The algorithm takes as input a message of arbitrary length and produces as output a 128-bit "fingerprint" or "message digest" of the input. It is conjectured that it is computationally infeasible to produce two messages having the same message digest, or to produce any message having a given prespecified target message digest. The MD5 algorithm is intended for digital signature applications, where a large file must be "compressed" in a secure manner before being encrypted with a private (secret) key under a public-key cryptosystem such as RSA. The MD5 algorithm is designed to be quite fast on 32-bit machines. In addition, the MD5 algorithm does not require any large substitution tables; the algorithm can be coded quite compactly. The MD5 algorithm is an extension of the MD4 message-digest algorithm 1,2]. MD5 is slightly slower than MD4, but is more "conservative" in design. MD5 was designed because it was felt that MD4 was perhaps being adopted for use more quickly than justified by the existing critical review; because MD4 was designed to be exceptionally fast, it is "at the edge" in terms of risking successful cryptanalytic attack. MD5 backs off a bit, giving up a little in speed for a much greater likelihood of ultimate security. It incorporates some suggestions made by various reviewers, and contains additional optimizations. The MD5 algorithm is being placed in the public domain for review and possible adoption as a standard. RFC Author: Ronald L.Rivest Massachusetts Institute of Technology Laboratory for Computer Science NE43 -324545 Technology Square Cambridge, MA 02139-1986 Phone: (617) 253-5880 EMail: Rivest@ theory.lcs.mit.edu CHANGE HISTORY: 0.1.0 RMH 1999/12/29 Original version

Constructor Summary

MD5()

Method Summary

void	init()
void	md5final()
byte[]	toByteArray()
void	update(char[] bytInput, long lngLen)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MD5

public MD5()

Method Detail

update

public void update(char[] bytInput,
                   long lngLen)

md5final

public void md5final()

toByteArray

public byte[] toByteArray()

init

public void init()