?? jdkdsaprivatekey.java
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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(); }}
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