package org.bouncycastle.jce.provider; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.math.BigInteger; 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.DERObject; import org.bouncycastle.asn1.DERObjectIdentifier; import org.bouncycastle.asn1.DEROutputStream; import org.bouncycastle.asn1.pkcs.PrivateKeyInfo; import org.bouncycastle.asn1.sec.ECPrivateKeyStructure; import org.bouncycastle.asn1.x509.AlgorithmIdentifier; import org.bouncycastle.asn1.x9.X962NamedCurves; import org.bouncycastle.asn1.x9.X962Parameters; import org.bouncycastle.asn1.x9.X9ECParameters; import org.bouncycastle.asn1.x9.X9ObjectIdentifiers; import org.bouncycastle.crypto.params.ECDomainParameters; import org.bouncycastle.crypto.params.ECPrivateKeyParameters; import org.bouncycastle.jce.interfaces.ECPrivateKey; import org.bouncycastle.jce.interfaces.PKCS12BagAttributeCarrier; import org.bouncycastle.jce.spec.ECNamedCurveParameterSpec; import org.bouncycastle.jce.spec.ECParameterSpec; import org.bouncycastle.jce.spec.ECPrivateKeySpec; public class JCEECPrivateKey implements ECPrivateKey, PKCS12BagAttributeCarrier { private String algorithm = "EC"; private BigInteger d; private ECParameterSpec ecSpec; private Hashtable pkcs12Attributes = new Hashtable(); private Vector pkcs12Ordering = new Vector(); protected JCEECPrivateKey() { } JCEECPrivateKey( ECPrivateKey key) { this.d = key.getD(); this.algorithm = key.getAlgorithm(); this.ecSpec = key.getParams(); } JCEECPrivateKey( String algorithm, ECPrivateKeySpec spec) { this.algorithm = algorithm; this.d = spec.getD(); this.ecSpec = spec.getParams(); } JCEECPrivateKey( String algorithm, ECPrivateKeyParameters params, ECParameterSpec spec) { ECDomainParameters dp = params.getParameters(); this.algorithm = algorithm; this.d = params.getD(); if (spec == null) { this.ecSpec = new ECParameterSpec( dp.getCurve(), dp.getG(), dp.getN(), dp.getH(), dp.getSeed()); } else { this.ecSpec = spec; } } JCEECPrivateKey( PrivateKeyInfo info) { X962Parameters params = new X962Parameters((DERObject)info.getAlgorithmId().getParameters()); if (params.isNamedCurve()) { DERObjectIdentifier oid = (DERObjectIdentifier)params.getParameters(); X9ECParameters ecP = X962NamedCurves.getByOID(oid); ecSpec = new ECNamedCurveParameterSpec( X962NamedCurves.getName(oid), ecP.getCurve(), ecP.getG(), ecP.getN(), ecP.getH(), ecP.getSeed()); } else { X9ECParameters ecP = new X9ECParameters((ASN1Sequence)params.getParameters()); ecSpec = new ECParameterSpec(ecP.getCurve(), ecP.getG(), ecP.getN(), ecP.getH(), ecP.getSeed()); } if (info.getPrivateKey() instanceof DERInteger) { DERInteger derD = (DERInteger)info.getPrivateKey(); this.d = derD.getValue(); } else { ECPrivateKeyStructure ec = new ECPrivateKeyStructure((ASN1Sequence)info.getPrivateKey()); this.d = ec.getKey(); } } public String getAlgorithm() { return algorithm; } /** * 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() { ByteArrayOutputStream bOut = new ByteArrayOutputStream(); DEROutputStream dOut = new DEROutputStream(bOut); X962Parameters params = null; if (ecSpec instanceof ECNamedCurveParameterSpec) { params = new X962Parameters(X962NamedCurves.getOID(((ECNamedCurveParameterSpec)ecSpec).getName())); } else { X9ECParameters ecP = new X9ECParameters( ecSpec.getCurve(), ecSpec.getG(), ecSpec.getN(), ecSpec.getH(), ecSpec.getSeed()); params = new X962Parameters(ecP); } PrivateKeyInfo info = new PrivateKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.id_ecPublicKey, params.getDERObject()), new ECPrivateKeyStructure(this.getD()).getDERObject()); try { dOut.writeObject(info); dOut.close(); } catch (IOException e) { throw new RuntimeException("Error encoding EC private key"); } return bOut.toByteArray(); } public ECParameterSpec getParams() { return ecSpec; } public BigInteger getD() { return d; } /* private void readObject( ObjectInputStream in) throws IOException, ClassNotFoundException { in.defaultReadObject(); boolean named = in.readBoolean(); if (named) { ecSpec = new ECNamedCurveParameterSpec( in.readUTF(), (ECCurve)in.readObject(), (ECPoint)in.readObject(), (BigInteger)in.readObject(), (BigInteger)in.readObject(), (byte[])in.readObject()); } else { ecSpec = new ECParameterSpec( (ECCurve)in.readObject(), (ECPoint)in.readObject(), (BigInteger)in.readObject(), (BigInteger)in.readObject(), (byte[])in.readObject()); } } private void writeObject( ObjectOutputStream out) throws IOException { out.defaultWriteObject(); if (this.ecSpec instanceof ECNamedCurveParameterSpec) { ECNamedCurveParameterSpec namedSpec = (ECNamedCurveParameterSpec)ecSpec; out.writeBoolean(true); out.writeUTF(namedSpec.getName()); } else { out.writeBoolean(false); } out.writeObject(ecSpec.getCurve()); out.writeObject(ecSpec.getG()); out.writeObject(ecSpec.getN()); out.writeObject(ecSpec.getH()); out.writeObject(ecSpec.getSeed()); } */ 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(); } }