org.jabber.jabberbeans.util
Class SHA1Helper

java.lang.Object
  |
  +--org.jabber.jabberbeans.util.SHA1Helper

public class SHA1Helper

extends java.lang.Object

implements java.io.Serializable

A SHA1Helper is used for authentication for users and component authentication. It is simply a wrapper around MessageDigest to give a simplified interface for performing the hashing.

Version:

$Revision: 1.1.1.1 $

Author:

David Waite <dwaite@jabber.com>, $Author: lucky $

See Also:

Serialized Form

Field Summary

private static char[]	HEX quick array to convert byte values to hex codes
private java.security.MessageDigest	md Message digest object

Constructor Summary

SHA1Helper()
Creates a new MessageDigest instance.

Method Summary

static java.lang.String	bytesToHex(byte[] data) This utility method is passed an array of bytes.
java.lang.String	digest(java.lang.String identifier, java.lang.String key) used to hash passwords and other key data to send over the wire, to prevent plaintext transmit.

Methods inherited from class java.lang.Object

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

Field Detail

md

private final java.security.MessageDigest md

Message digest object

HEX

private static final char[] HEX

quick array to convert byte values to hex codes

Constructor Detail

SHA1Helper

public SHA1Helper()
           throws java.lang.InstantiationException

Creates a new MessageDigest instance.

Method Detail

digest

public java.lang.String digest(java.lang.String identifier,
                               java.lang.String key)

used to hash passwords and other key data to send over the wire, to prevent plaintext transmit.

Parameters:

identifier - prefix, such as the SessionID

key - passkey, such as password or handshake

Returns:

String with the hash in hex string form

bytesToHex

public static java.lang.String bytesToHex(byte[] data)

This utility method is passed an array of bytes. It returns this array as a String in hexadecimal format. This is used internally by digest(). Data is returned in the format specified by the Jabber protocol.