package org.bouncycastle.jce.provider;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 java.util.Hashtable;import java.util.Vector;import org.bouncycastle.asn1.ASN1Sequence;import org.bouncycastle.asn1.DEREncodable;import org.bouncycastle.asn1.DERInteger;import org.bouncycastle.asn1.DERObjectIdentifier;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.jce.interfaces.PKCS12BagAttributeCarrier;public class JDKDSAPrivateKey    implements DSAPrivateKey, PKCS12BagAttributeCarrier{    BigInteger          x;    DSAParams           dsaSpec;    private Hashtable   pkcs12Attributes = new Hashtable();    private Vector      pkcs12Ordering = new Vector();    protected JDKDSAPrivateKey()    {    }    JDKDSAPrivateKey(        DSAPrivateKey    key)    {        this.x = key.getX();        this.dsaSpec = key.getParams();    }    JDKDSAPrivateKey(        DSAPrivateKeySpec    spec)    {        this.x = spec.getX();        this.dsaSpec = new DSAParameterSpec(spec.getP(), spec.getQ(), spec.getG());    }    JDKDSAPrivateKey(        PrivateKeyInfo  info)    {        DSAParameter    params = new DSAParameter((ASN1Sequence)info.getAlgorithmId().getParameters());        DERInteger      derX = (DERInteger)info.getPrivateKey();        this.x = derX.getValue();        this.dsaSpec = new DSAParameterSpec(params.getP(), params.getQ(), params.getG());    }    JDKDSAPrivateKey(        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()    {        PrivateKeyInfo          info = new PrivateKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.id_dsa, new DSAParameter(dsaSpec.getP(), dsaSpec.getQ(), dsaSpec.getG()).getDERObject()), new DERInteger(getX()));        return info.getDEREncoded();    }    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 void setBagAttribute(        DERObjectIdentifier oid,        DEREncodable        attribute)    {        pkcs12Attributes.put(oid, attribute);        pkcs12Ordering.addElement(oid);    }    public DEREncodable getBagAttribute(        DERObjectIdentifier oid)    {        return (DEREncodable)pkcs12Attributes.get(oid);    }    public Enumeration getBagAttributeKeys()    {        return pkcs12Ordering.elements();    }}