package org.bouncycastle.jce.provider;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.math.BigInteger;
import java.util.Enumeration;
import javax.crypto.interfaces.DHPrivateKey;
import javax.crypto.spec.DHParameterSpec;
import javax.crypto.spec.DHPrivateKeySpec;
import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERInteger;
import org.bouncycastle.asn1.oiw.ElGamalParameter;
import org.bouncycastle.asn1.oiw.OIWObjectIdentifiers;
import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.crypto.params.ElGamalPrivateKeyParameters;
import org.bouncycastle.jcajce.provider.asymmetric.util.KeyUtil;
import org.bouncycastle.jcajce.provider.asymmetric.util.PKCS12BagAttributeCarrierImpl;
import org.bouncycastle.jce.interfaces.ElGamalPrivateKey;
import org.bouncycastle.jce.interfaces.PKCS12BagAttributeCarrier;
import org.bouncycastle.jce.spec.ElGamalParameterSpec;
import org.bouncycastle.jce.spec.ElGamalPrivateKeySpec;
public class JCEElGamalPrivateKey
implements ElGamalPrivateKey, DHPrivateKey, PKCS12BagAttributeCarrier
{
static final long serialVersionUID = 4819350091141529678L;
BigInteger x;
ElGamalParameterSpec elSpec;
private PKCS12BagAttributeCarrierImpl attrCarrier = new PKCS12BagAttributeCarrierImpl();
protected JCEElGamalPrivateKey()
{
}
JCEElGamalPrivateKey(
ElGamalPrivateKey key)
{
this.x = key.getX();
this.elSpec = key.getParameters();
}
JCEElGamalPrivateKey(
DHPrivateKey key)
{
this.x = key.getX();
this.elSpec = new ElGamalParameterSpec(key.getParams().getP(), key.getParams().getG());
}
JCEElGamalPrivateKey(
ElGamalPrivateKeySpec spec)
{
this.x = spec.getX();
this.elSpec = new ElGamalParameterSpec(spec.getParams().getP(), spec.getParams().getG());
}
JCEElGamalPrivateKey(
DHPrivateKeySpec spec)
{
this.x = spec.getX();
this.elSpec = new ElGamalParameterSpec(spec.getP(), spec.getG());
}
JCEElGamalPrivateKey(
PrivateKeyInfo info)
throws IOException
{
ElGamalParameter params = new ElGamalParameter((ASN1Sequence)info.getAlgorithmId().getParameters());
DERInteger derX = ASN1Integer.getInstance(info.parsePrivateKey());
this.x = derX.getValue();
this.elSpec = new ElGamalParameterSpec(params.getP(), params.getG());
}
JCEElGamalPrivateKey(
ElGamalPrivateKeyParameters params)
{
this.x = params.getX();
this.elSpec = new ElGamalParameterSpec(params.getParameters().getP(), params.getParameters().getG());
}
public String getAlgorithm()
{
return "ElGamal";
}
/**
* return the encoding format we produce in getEncoded().
*
* @return the string "PKCS#8"
*/
public String getFormat()
{
return "PKCS#8";
}
/**
* Return a PKCS8 representation of the key. The sequence returned
* represents a full PrivateKeyInfo object.
*
* @return a PKCS8 representation of the key.
*/
public byte[] getEncoded()
{
return KeyUtil.getEncodedPrivateKeyInfo(new AlgorithmIdentifier(OIWObjectIdentifiers.elGamalAlgorithm, new ElGamalParameter(elSpec.getP(), elSpec.getG())), new DERInteger(getX()));
}
public ElGamalParameterSpec getParameters()
{
return elSpec;
}
public DHParameterSpec getParams()
{
return new DHParameterSpec(elSpec.getP(), elSpec.getG());
}
public BigInteger getX()
{
return x;
}
private void readObject(
ObjectInputStream in)
throws IOException, ClassNotFoundException
{
x = (BigInteger)in.readObject();
this.elSpec = new ElGamalParameterSpec((BigInteger)in.readObject(), (BigInteger)in.readObject());
}
private void writeObject(
ObjectOutputStream out)
throws IOException
{
out.writeObject(this.getX());
out.writeObject(elSpec.getP());
out.writeObject(elSpec.getG());
}
public void setBagAttribute(
ASN1ObjectIdentifier oid,
ASN1Encodable attribute)
{
attrCarrier.setBagAttribute(oid, attribute);
}
public ASN1Encodable getBagAttribute(
ASN1ObjectIdentifier oid)
{
return attrCarrier.getBagAttribute(oid);
}
public Enumeration getBagAttributeKeys()
{
return attrCarrier.getBagAttributeKeys();
}
}