org.xbill.DNS.utils
Class hmacSigner

java.lang.Object
  |
  +--org.xbill.DNS.utils.hmacSigner

public class hmacSigner

extends Object

A pure java implementation of the HMAC-MD5 secure hash algorithm

Field Summary

static boolean

verbose If true, all digested bytes will be printed

Constructor Summary

hmacSigner(byte[] key)
Creates a new HMAC instance

Method Summary

void	addData(byte[] b) Adds data to the current hash
void	addData(byte[] b, int offset, int length) Adds data to the current hash
void	clear() Resets the HMAC object for further use
byte[]	sign() Signs the data (computes the secure hash)
boolean	verify(byte[] signature) Verifies the data (computes the secure hash and compares it to the input)

Methods inherited from class java.lang.Object

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

Field Detail

verbose

public static boolean verbose

If true, all digested bytes will be printed

Constructor Detail

hmacSigner

public hmacSigner(byte[] key)

Creates a new HMAC instance

Parameters:

key - The secret key

Method Detail

addData

public void addData(byte[] b,
                    int offset,
                    int length)

Adds data to the current hash

Parameters:

b - The data

start - The index at which to start adding to the hash

len - The number of bytes to hash

addData

public void addData(byte[] b)

Adds data to the current hash

Parameters:

b - The data

sign

public byte[] sign()

Signs the data (computes the secure hash)

Returns:

An array with the signature

verify

public boolean verify(byte[] signature)

Verifies the data (computes the secure hash and compares it to the input)

Parameters:

signature - The signature to compare against

Returns:

true if the signature matched, false otherwise

clear

public void clear()

Resets the HMAC object for further use