/**************************************************************************
* Copyright (c) 2001 by Punch Telematix. All rights reserved. *
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* notice, this list of conditions and the following disclaimer. *
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* 3. Neither the name of Punch Telematix nor the names of *
* other contributors may be used to endorse or promote products *
* derived from this software without specific prior written permission.*
* *
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED *
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**************************************************************************/
/*
** $Id: Signature.java,v 1.2 2006/04/18 11:35:28 cvs Exp $
*/
package java.security;
import java.security.spec.AlgorithmParameterSpec;
public abstract class Signature extends SignatureSpi {
protected static final int SIGN = 2;
protected static final int UNINITIALIZED = 0;
protected static final int VERIFY = 3;
private static final String SIGNATURE_DOT = "Signature.";
public static Signature getInstance(String algorithm) throws NoSuchAlgorithmException{
SecurityAction action = new SecurityAction(algorithm, SIGNATURE_DOT);
Signature sign = (action.spi instanceof Signature) ? (Signature)action.spi :
new SignatureSpiWrapper((SignatureSpi)action.spi,algorithm);
sign.provider = action.provider;
return sign;
}
public static Signature getInstance(String algorithm, String provider)
throws NoSuchAlgorithmException, NoSuchProviderException {
SecurityAction action = new SecurityAction(algorithm, provider, SIGNATURE_DOT);
Signature sign = (action.spi instanceof Signature) ? (Signature)action.spi :
new SignatureSpiWrapper((SignatureSpi)action.spi,algorithm);
sign.provider = action.provider;
return sign;
}
public static Signature getInstance(String algorithm, Provider provider)
throws NoSuchAlgorithmException {
SecurityAction action = new SecurityAction(algorithm, provider, SIGNATURE_DOT);
Signature sign = (action.spi instanceof Signature) ? (Signature)action.spi :
new SignatureSpiWrapper((SignatureSpi)action.spi,algorithm);
sign.provider = provider;
return sign;
}
private String algorithm;
private Provider provider;
protected int state = UNINITIALIZED;
protected Signature(String algorithm){
if (algorithm == null){
throw new NullPointerException();
}
this.algorithm = algorithm;
}
public Object clone() throws CloneNotSupportedException{
return super.clone();
}
public final AlgorithmParameters getParameters() {
return this.engineGetParameters();
}
public final boolean verify(byte[] signature, int offset, int length)
throws SignatureException {
if(signature == null || offset < 0 || length < 0 ||
length + offset > signature.length) {
throw new IllegalArgumentException();
}
return this.engineVerify(signature, offset, length);
}
public final String getAlgorithm(){
return algorithm;
}
/**
** @deprecated
*/
public final Object getParameter(String param){
//System.out.println("java.security.Signature: getParameter("+param+") is called");
return engineGetParameter(param);
}
public final Provider getProvider(){
return provider;
}
public final void initSign(PrivateKey prtKey) throws InvalidKeyException{
//System.out.println("java.security.Signature: initSign("+prtKey+") is called");
engineInitSign(prtKey);
state = SIGN;
}
public final void initSign(PrivateKey prtKey, SecureRandom rnd) throws InvalidKeyException{
//System.out.println("java.security.Signature: initSign("+prtKey+", "+rnd+") is called");
engineInitSign(prtKey, rnd);
state = SIGN;
}
public final void initVerify(PublicKey publicKey) throws InvalidKeyException{
//System.out.println("java.security.Signature: initVerify("+publicKey+") is called");
engineInitVerify(publicKey);
state = VERIFY;
}
public final void initVerify(java.security.cert.Certificate certificate) throws InvalidKeyException {
engineInitVerify(certificate.getPublicKey());
state = VERIFY;
}
public final void setParameter(AlgorithmParameterSpec params) throws InvalidAlgorithmParameterException{
//System.out.println("java.security.Signature: setParameter("+params+") is called");
engineSetParameter(params);
}
/**
** @deprecated. Use setParameter.
*/
public final void setParameter(String param, Object value){
//System.out.println("java.security.Signature: setParameter("+param+", "+value+") is called");
engineSetParameter(param, value);
}
public final byte[] sign() throws SignatureException{
//System.out.println("java.security.Signature: sign() is called");
if(state != SIGN){
throw new SignatureException("the Signature has an invalid state");
}
return engineSign();
}
public final int sign(byte[] buf, int offset, int len) throws SignatureException{
//System.out.println("java.security.Signature: sign("+buf+", "+offset+", "+len+") is called");
if(state != SIGN){
throw new SignatureException("the Signature has an invalid state");
}
return engineSign(buf, offset, len);
}
public String toString(){
String s = null;
switch(state){
case SIGN:
s = "SIGN";
break;
case VERIFY:
s = "VERIFY";
break;
default:
s = "UNINITIALIZED";
}
return "Signature state = "+s+" using "+algorithm;
}
public final void update(byte b) throws SignatureException{
//System.out.println("java.security.Signature: update("+b+") is called");
if(state == UNINITIALIZED){
throw new SignatureException("the Signature has not initialized");
}
engineUpdate(b);
}
public final void update(byte[] data) throws SignatureException{
//System.out.println("java.security.Signature: update("+data+") is called");
if(state == UNINITIALIZED){
throw new SignatureException("the Signature has not initialized");
}
engineUpdate(data, 0, data.length);
}
public final void update(byte[] data, int off, int len) throws SignatureException{
//System.out.println("java.security.Signature: update("+data+", "+off+", "+len+") is called");
if(state == UNINITIALIZED){
throw new SignatureException("the Signature has not initialized");
}
engineUpdate(data, off, len);
}
public final boolean verify(byte[] signature) throws SignatureException{
//System.out.println("java.security.Signature: verify("+signature+") is called");
if(state != VERIFY){
throw new SignatureException("the Signature has an invalid state");
}
return engineVerify(signature);
}
}