ostore.security.thresh
Class ThresholdSignature

java.lang.Object
  |
  +--java.security.SignatureSpi
        |
        +--java.security.Signature
              |
              +--ostore.security.thresh.ThresholdSignature

All Implemented Interfaces:

QSSignature, QuickSerializable

public class ThresholdSignature

extends Signature

implements QSSignature

A verification signature engine for threshold signatures. Will not actually produce signatures, only verify them.

Version:

$Id: ThresholdSignature.java,v 1.16 2002/08/02 19:39:56 geels Exp $

Author:

Sean C. Rhea

Field Summary

Fields inherited from class java.security.Signature

SIGN, state, UNINITIALIZED, VERIFY

Fields inherited from class java.security.SignatureSpi

appRandom

Constructor Summary

ThresholdSignature()

ThresholdSignature(InputBuffer buffer)

Method Summary

String	algorithm() The signing algorithm.
protected Object	engineGetParameter(String param)
protected void	engineInitSign(PrivateKey key)
protected void	engineInitVerify(PublicKey key)
protected void	engineSetParameter(String param, Object value)
protected byte[]	engineSign()
protected void	engineUpdate(byte b)
protected void	engineUpdate(byte[] in, int offset, int length)
protected boolean	engineVerify(byte[] signature)
boolean	equals(Object obj)
int	hashCode()
String	provider() The signing algorithm's provider, as used with getInstance.
void	serialize(OutputBuffer buffer) Add the object to the buffer.

Methods inherited from class java.security.Signature

clone, getAlgorithm, getInstance, getInstance, getInstance, getParameter, getParameters, getProvider, initSign, initSign, initVerify, initVerify, setParameter, setParameter, sign, sign, toString, update, update, update, verify, verify

Methods inherited from class java.security.SignatureSpi

engineGetParameters, engineInitSign, engineSetParameter, engineSign, engineVerify

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ThresholdSignature

public ThresholdSignature()

ThresholdSignature

public ThresholdSignature(InputBuffer buffer)

Method Detail

algorithm

public String algorithm()

Description copied from interface: QSSignature

The signing algorithm. Using this and the value of QSSignature.provider(), a user of this class should be able to produce a signature engine to pass to SignedQS.verify(java.security.PublicKey, java.security.Signature) by calling Signature.getInstance(String, String).

Specified by:

algorithm in interface QSSignature

Returns:

the name of the digital signature algorithm, for instance, "SHA-1/RSA/PKCS#1"

provider

public String provider()

Description copied from interface: QSSignature

The signing algorithm's provider, as used with getInstance. Using this and the value of QSSignature.algorithm(), a user of this class should be able to produce a signature engine to pass to SignedQS.verify(java.security.PublicKey, java.security.Signature) by calling Signature.getInstance(String, String).

Specified by:

provider in interface QSSignature

Returns:

the name of the digital signature algorithm provider, for instance, "CryptixCrypto"

serialize

public void serialize(OutputBuffer buffer)

Description copied from interface: QuickSerializable

Add the object to the buffer.

Specified by:

serialize in interface QuickSerializable

Parameters:

buffer - the output buffer to add the object to

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

engineInitSign

protected void engineInitSign(PrivateKey key)
                       throws InvalidKeyException

Specified by:

engineInitSign in class SignatureSpi

InvalidKeyException

engineInitVerify

protected void engineInitVerify(PublicKey key)
                         throws InvalidKeyException

Specified by:

engineInitVerify in class SignatureSpi

InvalidKeyException

engineUpdate

protected void engineUpdate(byte b)
                     throws SignatureException

Specified by:

engineUpdate in class SignatureSpi

SignatureException

engineUpdate

protected void engineUpdate(byte[] in,
                            int offset,
                            int length)
                     throws SignatureException

Specified by:

engineUpdate in class SignatureSpi

SignatureException

engineSign

protected byte[] engineSign()
                     throws SignatureException

Specified by:

engineSign in class SignatureSpi

SignatureException

engineVerify

protected boolean engineVerify(byte[] signature)
                        throws SignatureException

Specified by:

engineVerify in class SignatureSpi

SignatureException

engineSetParameter

protected void engineSetParameter(String param,
                                  Object value)
                           throws InvalidParameterException

Specified by:

engineSetParameter in class SignatureSpi

InvalidParameterException

engineGetParameter

protected Object engineGetParameter(String param)
                             throws InvalidParameterException

Specified by:

engineGetParameter in class SignatureSpi

InvalidParameterException