/**
*
* Copyright 2003-2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.geronimo.util.jce.provider;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.math.BigInteger;
import java.security.interfaces.DSAParams;
import java.security.interfaces.DSAPublicKey;
import java.security.spec.DSAParameterSpec;
import java.security.spec.DSAPublicKeySpec;
import org.apache.geronimo.util.asn1.ASN1Sequence;
import org.apache.geronimo.util.asn1.DERInteger;
import org.apache.geronimo.util.asn1.DEROutputStream;
import org.apache.geronimo.util.asn1.x509.AlgorithmIdentifier;
import org.apache.geronimo.util.asn1.x509.DSAParameter;
import org.apache.geronimo.util.asn1.x509.SubjectPublicKeyInfo;
import org.apache.geronimo.util.asn1.x9.X9ObjectIdentifiers;
import org.apache.geronimo.util.crypto.params.DSAPublicKeyParameters;
public class JDKDSAPublicKey
implements DSAPublicKey
{
private BigInteger y;
private DSAParams dsaSpec;
JDKDSAPublicKey(
DSAPublicKeySpec spec)
{
this.y = spec.getY();
this.dsaSpec = new DSAParameterSpec(spec.getP(), spec.getQ(), spec.getG());
}
JDKDSAPublicKey(
DSAPublicKey key)
{
this.y = key.getY();
this.dsaSpec = key.getParams();
}
JDKDSAPublicKey(
DSAPublicKeyParameters params)
{
this.y = params.getY();
this.dsaSpec = new DSAParameterSpec(params.getParameters().getP(), params.getParameters().getQ(), params.getParameters().getG());
}
JDKDSAPublicKey(
BigInteger y,
DSAParameterSpec dsaSpec)
{
this.y = y;
this.dsaSpec = dsaSpec;
}
JDKDSAPublicKey(
SubjectPublicKeyInfo info)
{
DSAParameter params = new DSAParameter((ASN1Sequence)info.getAlgorithmId().getParameters());
DERInteger derY = null;
try
{
derY = (DERInteger)info.getPublicKey();
}
catch (IOException e)
{
throw new IllegalArgumentException("invalid info structure in DSA public key");
}
this.y = derY.getValue();
this.dsaSpec = new DSAParameterSpec(params.getP(), params.getQ(), params.getG());
}
public String getAlgorithm()
{
return "DSA";
}
public String getFormat()
{
return "X.509";
}
public byte[] getEncoded()
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
DEROutputStream dOut = new DEROutputStream(bOut);
SubjectPublicKeyInfo info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.id_dsa, new DSAParameter(dsaSpec.getP(), dsaSpec.getQ(), dsaSpec.getG()).getDERObject()), new DERInteger(y));
try
{
dOut.writeObject(info);
dOut.close();
}
catch (IOException e)
{
throw new RuntimeException("Error encoding DSA public key");
}
return bOut.toByteArray();
}
public DSAParams getParams()
{
return dsaSpec;
}
public BigInteger getY()
{
return y;
}
public String toString()
{
StringBuffer buf = new StringBuffer();
String nl = System.getProperty("line.separator");
buf.append("DSA Public Key" + nl);
buf.append(" y: " + this.getY().toString(16) + nl);
return buf.toString();
}
}