edu.vt.middleware.crypt.signature
Class DSASignature

java.lang.Object
  edu.vt.middleware.crypt.AbstractAlgorithm
      edu.vt.middleware.crypt.signature.SignatureAlgorithm
          edu.vt.middleware.crypt.signature.AbstractDSASignature
              edu.vt.middleware.crypt.signature.DSASignature

All Implemented Interfaces:

Algorithm

public class DSASignature
extends AbstractDSASignature

Implements the DSA signature algorithm.

Version:

$Revision: 2744 $

Author:

Middleware Services

Field Summary

Fields inherited from class edu.vt.middleware.crypt.signature.AbstractDSASignature

signer

Fields inherited from class edu.vt.middleware.crypt.signature.SignatureAlgorithm

digest, signKey, verifyKey

Fields inherited from class edu.vt.middleware.crypt.AbstractAlgorithm

algorithm, logger, randomByteSize, randomProvider

Constructor Summary

DSASignature()
Creates a new DSA signature class that uses a SHA-1 for message digest computation.

DSASignature(DigestAlgorithm d)
Creates a new DSA signature class that uses the given digest algorithm for message digest computation.

Method Summary

void	initSign() Initialize the signature for the SignatureAlgorithm.sign(byte[]) operation.
void	initVerify() Initialize the signature for the SignatureAlgorithm.verify(byte[], byte[]) operation.
void	setSignKey(PrivateKey key) Sets the private key used for signing.
void	setVerifyKey(PublicKey key) Sets the public key used for verification.

Methods inherited from class edu.vt.middleware.crypt.signature.AbstractDSASignature

init, sign, sign, verify, verify

Methods inherited from class edu.vt.middleware.crypt.signature.SignatureAlgorithm

clone, newInstance, newInstance, sign, sign, verify, verify

Methods inherited from class edu.vt.middleware.crypt.AbstractAlgorithm

getAlgorithm, getRandomData, setRandomProvider, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

DSASignature

public DSASignature()

Creates a new DSA signature class that uses a SHA-1 for message digest computation. This is the conventional DSA signature configuration.

DSASignature

public DSASignature(DigestAlgorithm d)

Creates a new DSA signature class that uses the given digest algorithm for message digest computation.

Parameters:

d - Message digest algorithm.

Method Detail

setSignKey

public void setSignKey(PrivateKey key)

Sets the private key used for signing.

Overrides:

setSignKey in class SignatureAlgorithm

Parameters:

key - Private key.

setVerifyKey

public void setVerifyKey(PublicKey key)

Sets the public key used for verification.

Overrides:

setVerifyKey in class SignatureAlgorithm

Parameters:

key - Public key.

initSign

public void initSign()

Initialize the signature for the SignatureAlgorithm.sign(byte[]) operation.

Overrides:

initSign in class SignatureAlgorithm

initVerify

public void initVerify()

Initialize the signature for the SignatureAlgorithm.verify(byte[], byte[]) operation.

Overrides:

initVerify in class SignatureAlgorithm