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package org.bouncycastle.jcajce.provider.asymmetric.dsa;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.math.BigInteger;
import java.security.interfaces.DSAParams;
import java.security.interfaces.DSAPrivateKey;
import java.security.spec.DSAParameterSpec;
import java.security.spec.DSAPrivateKeySpec;
import java.util.Enumeration;
import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.asn1.x509.DSAParameter;
import org.bouncycastle.asn1.x9.X9ObjectIdentifiers;
import org.bouncycastle.crypto.params.DSAPrivateKeyParameters;
import org.bouncycastle.jcajce.provider.asymmetric.util.KeyUtil;
import org.bouncycastle.jcajce.provider.asymmetric.util.PKCS12BagAttributeCarrierImpl;
import org.bouncycastle.jce.interfaces.PKCS12BagAttributeCarrier;
public class BCDSAPrivateKey
implements DSAPrivateKey, PKCS12BagAttributeCarrier
{
private static final long serialVersionUID = -4677259546958385734L;
private BigInteger x;
private transient DSAParams dsaSpec;
private transient PKCS12BagAttributeCarrierImpl attrCarrier = new PKCS12BagAttributeCarrierImpl();
protected BCDSAPrivateKey()
{
}
BCDSAPrivateKey(
DSAPrivateKey key)
{
this.x = key.getX();
this.dsaSpec = key.getParams();
}
BCDSAPrivateKey(
DSAPrivateKeySpec spec)
{
this.x = spec.getX();
this.dsaSpec = new DSAParameterSpec(spec.getP(), spec.getQ(), spec.getG());
}
public BCDSAPrivateKey(
PrivateKeyInfo info)
throws IOException
{
DSAParameter params = DSAParameter.getInstance(info.getPrivateKeyAlgorithm().getParameters());
ASN1Integer derX = (ASN1Integer)info.parsePrivateKey();
this.x = derX.getValue();
this.dsaSpec = new DSAParameterSpec(params.getP(), params.getQ(), params.getG());
}
BCDSAPrivateKey(
DSAPrivateKeyParameters params)
{
this.x = params.getX();
this.dsaSpec = new DSAParameterSpec(params.getParameters().getP(), params.getParameters().getQ(), params.getParameters().getG());
}
public String getAlgorithm()
{
return "DSA";
}
/**
* 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(X9ObjectIdentifiers.id_dsa, new DSAParameter(dsaSpec.getP(), dsaSpec.getQ(), dsaSpec.getG()).toASN1Primitive()), new ASN1Integer(getX()));
}
public DSAParams getParams()
{
return dsaSpec;
}
public BigInteger getX()
{
return x;
}
public boolean equals(
Object o)
{
if (!(o instanceof DSAPrivateKey))
{
return false;
}
DSAPrivateKey other = (DSAPrivateKey)o;
return this.getX().equals(other.getX())
&& this.getParams().getG().equals(other.getParams().getG())
&& this.getParams().getP().equals(other.getParams().getP())
&& this.getParams().getQ().equals(other.getParams().getQ());
}
public int hashCode()
{
return this.getX().hashCode() ^ this.getParams().getG().hashCode()
^ this.getParams().getP().hashCode() ^ this.getParams().getQ().hashCode();
}
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();
}
private void readObject(
ObjectInputStream in)
throws IOException, ClassNotFoundException
{
in.defaultReadObject();
this.dsaSpec = new DSAParameterSpec((BigInteger)in.readObject(), (BigInteger)in.readObject(), (BigInteger)in.readObject());
this.attrCarrier = new PKCS12BagAttributeCarrierImpl();
}
private void writeObject(
ObjectOutputStream out)
throws IOException
{
out.defaultWriteObject();
out.writeObject(dsaSpec.getP());
out.writeObject(dsaSpec.getQ());
out.writeObject(dsaSpec.getG());
}
}
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