| 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.ASN1Encoding; |
| import org.bouncycastle.asn1.ASN1ObjectIdentifier; |
| import org.bouncycastle.asn1.ASN1Sequence; |
| import org.bouncycastle.asn1.DERInteger; |
| import org.bouncycastle.asn1.DERObjectIdentifier; |
| import org.bouncycastle.asn1.pkcs.DHParameter; |
| import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers; |
| import org.bouncycastle.asn1.pkcs.PrivateKeyInfo; |
| import org.bouncycastle.asn1.x509.AlgorithmIdentifier; |
| import org.bouncycastle.asn1.x9.DHDomainParameters; |
| import org.bouncycastle.asn1.x9.X9ObjectIdentifiers; |
| import org.bouncycastle.crypto.params.DHPrivateKeyParameters; |
| import org.bouncycastle.jcajce.provider.asymmetric.util.PKCS12BagAttributeCarrierImpl; |
| import org.bouncycastle.jce.interfaces.PKCS12BagAttributeCarrier; |
| |
| public class JCEDHPrivateKey |
| implements DHPrivateKey, PKCS12BagAttributeCarrier |
| { |
| static final long serialVersionUID = 311058815616901812L; |
| |
| BigInteger x; |
| |
| private DHParameterSpec dhSpec; |
| private PrivateKeyInfo info; |
| |
| private PKCS12BagAttributeCarrier attrCarrier = new PKCS12BagAttributeCarrierImpl(); |
| |
| protected JCEDHPrivateKey() |
| { |
| } |
| |
| JCEDHPrivateKey( |
| DHPrivateKey key) |
| { |
| this.x = key.getX(); |
| this.dhSpec = key.getParams(); |
| } |
| |
| JCEDHPrivateKey( |
| DHPrivateKeySpec spec) |
| { |
| this.x = spec.getX(); |
| this.dhSpec = new DHParameterSpec(spec.getP(), spec.getG()); |
| } |
| |
| JCEDHPrivateKey( |
| PrivateKeyInfo info) |
| throws IOException |
| { |
| ASN1Sequence seq = ASN1Sequence.getInstance(info.getAlgorithmId().getParameters()); |
| DERInteger derX = DERInteger.getInstance(info.parsePrivateKey()); |
| DERObjectIdentifier id = info.getAlgorithmId().getAlgorithm(); |
| |
| this.info = info; |
| this.x = derX.getValue(); |
| |
| if (id.equals(PKCSObjectIdentifiers.dhKeyAgreement)) |
| { |
| DHParameter params = DHParameter.getInstance(seq); |
| |
| if (params.getL() != null) |
| { |
| this.dhSpec = new DHParameterSpec(params.getP(), params.getG(), params.getL().intValue()); |
| } |
| else |
| { |
| this.dhSpec = new DHParameterSpec(params.getP(), params.getG()); |
| } |
| } |
| else if (id.equals(X9ObjectIdentifiers.dhpublicnumber)) |
| { |
| DHDomainParameters params = DHDomainParameters.getInstance(seq); |
| |
| this.dhSpec = new DHParameterSpec(params.getP().getValue(), params.getG().getValue()); |
| } |
| else |
| { |
| throw new IllegalArgumentException("unknown algorithm type: " + id); |
| } |
| } |
| |
| JCEDHPrivateKey( |
| DHPrivateKeyParameters params) |
| { |
| this.x = params.getX(); |
| this.dhSpec = new DHParameterSpec(params.getParameters().getP(), params.getParameters().getG(), params.getParameters().getL()); |
| } |
| |
| public String getAlgorithm() |
| { |
| return "DH"; |
| } |
| |
| /** |
| * 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() |
| { |
| try |
| { |
| if (info != null) |
| { |
| return info.getEncoded(ASN1Encoding.DER); |
| } |
| |
| PrivateKeyInfo info = new PrivateKeyInfo(new AlgorithmIdentifier(PKCSObjectIdentifiers.dhKeyAgreement, new DHParameter(dhSpec.getP(), dhSpec.getG(), dhSpec.getL())), new DERInteger(getX())); |
| |
| return info.getEncoded(ASN1Encoding.DER); |
| } |
| catch (IOException e) |
| { |
| return null; |
| } |
| } |
| |
| public DHParameterSpec getParams() |
| { |
| return dhSpec; |
| } |
| |
| public BigInteger getX() |
| { |
| return x; |
| } |
| |
| private void readObject( |
| ObjectInputStream in) |
| throws IOException, ClassNotFoundException |
| { |
| x = (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.getX()); |
| out.writeObject(dhSpec.getP()); |
| out.writeObject(dhSpec.getG()); |
| out.writeInt(dhSpec.getL()); |
| } |
| |
| public void setBagAttribute( |
| ASN1ObjectIdentifier oid, |
| ASN1Encodable attribute) |
| { |
| attrCarrier.setBagAttribute(oid, attribute); |
| } |
| |
| public ASN1Encodable getBagAttribute( |
| DERObjectIdentifier oid) |
| { |
| return attrCarrier.getBagAttribute(oid); |
| } |
| |
| public Enumeration getBagAttributeKeys() |
| { |
| return attrCarrier.getBagAttributeKeys(); |
| } |
| } |