/**
*
* 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.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.math.BigInteger;
import javax.crypto.interfaces.DHPublicKey;
import javax.crypto.spec.DHParameterSpec;
import javax.crypto.spec.DHPublicKeySpec;
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.pkcs.DHParameter;
import org.apache.geronimo.util.asn1.x509.AlgorithmIdentifier;
import org.apache.geronimo.util.asn1.x509.SubjectPublicKeyInfo;
import org.apache.geronimo.util.asn1.x9.X9ObjectIdentifiers;
import org.apache.geronimo.util.crypto.params.DHPublicKeyParameters;
public class JCEDHPublicKey
implements DHPublicKey
{
private BigInteger y;
private DHParameterSpec dhSpec;
JCEDHPublicKey(
DHPublicKeySpec spec)
{
this.y = spec.getY();
this.dhSpec = new DHParameterSpec(spec.getP(), spec.getG());
}
JCEDHPublicKey(
DHPublicKey key)
{
this.y = key.getY();
this.dhSpec = key.getParams();
}
JCEDHPublicKey(
DHPublicKeyParameters params)
{
this.y = params.getY();
this.dhSpec = new DHParameterSpec(params.getParameters().getP(), params.getParameters().getG(), 0);
}
JCEDHPublicKey(
BigInteger y,
DHParameterSpec dhSpec)
{
this.y = y;
this.dhSpec = dhSpec;
}
JCEDHPublicKey(
SubjectPublicKeyInfo info)
{
DHParameter params = new DHParameter((ASN1Sequence)info.getAlgorithmId().getParameters());
DERInteger derY = null;
try
{
derY = (DERInteger)info.getPublicKey();
}
catch (IOException e)
{
throw new IllegalArgumentException("invalid info structure in DH public key");
}
this.y = derY.getValue();
if (params.getL() != null)
{
this.dhSpec = new DHParameterSpec(params.getP(), params.getG(), params.getL().intValue());
}
else
{
this.dhSpec = new DHParameterSpec(params.getP(), params.getG());
}
}
public String getAlgorithm()
{
return "DH";
}
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.dhpublicnumber, new DHParameter(dhSpec.getP(), dhSpec.getG(), dhSpec.getL()).getDERObject()), new DERInteger(y));
try
{
dOut.writeObject(info);
dOut.close();
}
catch (IOException e)
{
throw new RuntimeException("Error encoding DH public key");
}
return bOut.toByteArray();
}
public DHParameterSpec getParams()
{
return dhSpec;
}
public BigInteger getY()
{
return y;
}
private void readObject(
ObjectInputStream in)
throws IOException, ClassNotFoundException
{
this.y = (BigInteger)in.readObject();
this.dhSpec = new DHParameterSpec((BigInteger)in.readObject(), (BigInteger)in.readObject(), in.readInt());
}
private void writeObject(
ObjectOutputStream out)
throws IOException
{
out.writeObject(this.getY());
out.writeObject(dhSpec.getP());
out.writeObject(dhSpec.getG());
out.writeInt(dhSpec.getL());
}
}