com.sun.xml.ws.security.opt.crypto.dsig.internal
Class HmacSHA1

java.lang.Object
  com.sun.xml.ws.security.opt.crypto.dsig.internal.HmacSHA1

public class HmacSHA1
extends java.lang.Object

An implementation of the HMAC-SHA1 (RFC 2104)

Author:

Joyce Leung

Constructor Summary

HmacSHA1()

Method Summary

void	init(java.security.Key key, int length) Initialize with the key
byte[]	sign() Signs the data
void	update(byte data)
void	update(byte[] data) update the engine with data
void	update(byte[] data, int offset, int len)
boolean	verify(byte[] signature) Verifies the signature

Methods inherited from class java.lang.Object

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

Constructor Detail

HmacSHA1

public HmacSHA1()

Method Detail

init

public void init(java.security.Key key,
                 int length)
          throws java.security.InvalidKeyException

Initialize with the key

Parameters:

key - a Hmac key

length - output length in byte. length should be > 0 for a specified length or -1 for unspecified length (length of the signed output)

Throws:

java.security.InvalidKeyException - if key is null

update

public void update(byte[] data)

update the engine with data

Parameters:

data - information to be signed or verified

update

public void update(byte data)

update

public void update(byte[] data,
                   int offset,
                   int len)

sign

public byte[] sign()
            throws java.security.SignatureException

Signs the data

Throws:

java.security.SignatureException

verify

public boolean verify(byte[] signature)
               throws java.security.SignatureException

Verifies the signature

Parameters:

siganture - the signature to be verified

Throws:

java.security.SignatureException