| package org.bouncycastle.jcajce.provider.asymmetric.ec; |
| |
| import java.io.IOException; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| import java.math.BigInteger; |
| import java.security.interfaces.ECPrivateKey; |
| import java.security.spec.ECParameterSpec; |
| import java.security.spec.ECPoint; |
| import java.security.spec.ECPrivateKeySpec; |
| import java.security.spec.EllipticCurve; |
| import java.util.Enumeration; |
| |
| import org.bouncycastle.asn1.ASN1Encodable; |
| import org.bouncycastle.asn1.ASN1Encoding; |
| import org.bouncycastle.asn1.ASN1Integer; |
| import org.bouncycastle.asn1.ASN1ObjectIdentifier; |
| import org.bouncycastle.asn1.ASN1Primitive; |
| import org.bouncycastle.asn1.DERBitString; |
| import org.bouncycastle.asn1.DERNull; |
| import org.bouncycastle.asn1.pkcs.PrivateKeyInfo; |
| import org.bouncycastle.asn1.x509.AlgorithmIdentifier; |
| import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo; |
| 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.jcajce.provider.asymmetric.util.EC5Util; |
| import org.bouncycastle.jcajce.provider.asymmetric.util.ECUtil; |
| import org.bouncycastle.jcajce.provider.asymmetric.util.PKCS12BagAttributeCarrierImpl; |
| import org.bouncycastle.jcajce.provider.config.ProviderConfiguration; |
| import org.bouncycastle.jce.interfaces.ECPointEncoder; |
| import org.bouncycastle.jce.interfaces.PKCS12BagAttributeCarrier; |
| import org.bouncycastle.jce.provider.BouncyCastleProvider; |
| import org.bouncycastle.jce.spec.ECNamedCurveSpec; |
| import org.bouncycastle.math.ec.ECCurve; |
| |
| public class BCECPrivateKey |
| implements ECPrivateKey, org.bouncycastle.jce.interfaces.ECPrivateKey, PKCS12BagAttributeCarrier, ECPointEncoder |
| { |
| static final long serialVersionUID = 994553197664784084L; |
| |
| private String algorithm = "EC"; |
| private boolean withCompression; |
| |
| private transient BigInteger d; |
| private transient ECParameterSpec ecSpec; |
| private transient ProviderConfiguration configuration; |
| private transient DERBitString publicKey; |
| |
| private transient PKCS12BagAttributeCarrierImpl attrCarrier = new PKCS12BagAttributeCarrierImpl(); |
| |
| protected BCECPrivateKey() |
| { |
| } |
| |
| public BCECPrivateKey( |
| ECPrivateKey key, |
| ProviderConfiguration configuration) |
| { |
| this.d = key.getS(); |
| this.algorithm = key.getAlgorithm(); |
| this.ecSpec = key.getParams(); |
| this.configuration = configuration; |
| } |
| |
| public BCECPrivateKey( |
| String algorithm, |
| org.bouncycastle.jce.spec.ECPrivateKeySpec spec, |
| ProviderConfiguration configuration) |
| { |
| this.algorithm = algorithm; |
| this.d = spec.getD(); |
| |
| if (spec.getParams() != null) // can be null if implicitlyCA |
| { |
| ECCurve curve = spec.getParams().getCurve(); |
| EllipticCurve ellipticCurve; |
| |
| ellipticCurve = EC5Util.convertCurve(curve, spec.getParams().getSeed()); |
| |
| this.ecSpec = EC5Util.convertSpec(ellipticCurve, spec.getParams()); |
| } |
| else |
| { |
| this.ecSpec = null; |
| } |
| |
| this.configuration = configuration; |
| } |
| |
| |
| public BCECPrivateKey( |
| String algorithm, |
| ECPrivateKeySpec spec, |
| ProviderConfiguration configuration) |
| { |
| this.algorithm = algorithm; |
| this.d = spec.getS(); |
| this.ecSpec = spec.getParams(); |
| this.configuration = configuration; |
| } |
| |
| public BCECPrivateKey( |
| String algorithm, |
| BCECPrivateKey key) |
| { |
| this.algorithm = algorithm; |
| this.d = key.d; |
| this.ecSpec = key.ecSpec; |
| this.withCompression = key.withCompression; |
| this.attrCarrier = key.attrCarrier; |
| this.publicKey = key.publicKey; |
| this.configuration = key.configuration; |
| } |
| |
| public BCECPrivateKey( |
| String algorithm, |
| ECPrivateKeyParameters params, |
| BCECPublicKey pubKey, |
| ECParameterSpec spec, |
| ProviderConfiguration configuration) |
| { |
| ECDomainParameters dp = params.getParameters(); |
| |
| this.algorithm = algorithm; |
| this.d = params.getD(); |
| this.configuration = configuration; |
| |
| if (spec == null) |
| { |
| EllipticCurve ellipticCurve = EC5Util.convertCurve(dp.getCurve(), dp.getSeed()); |
| |
| this.ecSpec = new ECParameterSpec( |
| ellipticCurve, |
| new ECPoint( |
| dp.getG().getAffineXCoord().toBigInteger(), |
| dp.getG().getAffineYCoord().toBigInteger()), |
| dp.getN(), |
| dp.getH().intValue()); |
| } |
| else |
| { |
| this.ecSpec = spec; |
| } |
| |
| publicKey = getPublicKeyDetails(pubKey); |
| } |
| |
| public BCECPrivateKey( |
| String algorithm, |
| ECPrivateKeyParameters params, |
| BCECPublicKey pubKey, |
| org.bouncycastle.jce.spec.ECParameterSpec spec, |
| ProviderConfiguration configuration) |
| { |
| ECDomainParameters dp = params.getParameters(); |
| |
| this.algorithm = algorithm; |
| this.d = params.getD(); |
| this.configuration = configuration; |
| |
| if (spec == null) |
| { |
| EllipticCurve ellipticCurve = EC5Util.convertCurve(dp.getCurve(), dp.getSeed()); |
| |
| this.ecSpec = new ECParameterSpec( |
| ellipticCurve, |
| new ECPoint( |
| dp.getG().getAffineXCoord().toBigInteger(), |
| dp.getG().getAffineYCoord().toBigInteger()), |
| dp.getN(), |
| dp.getH().intValue()); |
| } |
| else |
| { |
| EllipticCurve ellipticCurve = EC5Util.convertCurve(spec.getCurve(), spec.getSeed()); |
| |
| this.ecSpec = EC5Util.convertSpec(ellipticCurve, spec); |
| } |
| |
| publicKey = getPublicKeyDetails(pubKey); |
| } |
| |
| public BCECPrivateKey( |
| String algorithm, |
| ECPrivateKeyParameters params, |
| ProviderConfiguration configuration) |
| { |
| this.algorithm = algorithm; |
| this.d = params.getD(); |
| this.ecSpec = null; |
| this.configuration = configuration; |
| } |
| |
| BCECPrivateKey( |
| String algorithm, |
| PrivateKeyInfo info, |
| ProviderConfiguration configuration) |
| throws IOException |
| { |
| this.algorithm = algorithm; |
| this.configuration = configuration; |
| populateFromPrivKeyInfo(info); |
| } |
| |
| private void populateFromPrivKeyInfo(PrivateKeyInfo info) |
| throws IOException |
| { |
| X962Parameters params = X962Parameters.getInstance(info.getPrivateKeyAlgorithm().getParameters()); |
| |
| if (params.isNamedCurve()) |
| { |
| ASN1ObjectIdentifier oid = ASN1ObjectIdentifier.getInstance(params.getParameters()); |
| X9ECParameters ecP = ECUtil.getNamedCurveByOid(oid); |
| EllipticCurve ellipticCurve = EC5Util.convertCurve(ecP.getCurve(), ecP.getSeed()); |
| |
| ecSpec = new ECNamedCurveSpec( |
| ECUtil.getCurveName(oid), |
| ellipticCurve, |
| new ECPoint( |
| ecP.getG().getAffineXCoord().toBigInteger(), |
| ecP.getG().getAffineYCoord().toBigInteger()), |
| ecP.getN(), |
| ecP.getH()); |
| } |
| else if (params.isImplicitlyCA()) |
| { |
| ecSpec = null; |
| } |
| else |
| { |
| X9ECParameters ecP = X9ECParameters.getInstance(params.getParameters()); |
| EllipticCurve ellipticCurve = EC5Util.convertCurve(ecP.getCurve(), ecP.getSeed()); |
| |
| this.ecSpec = new ECParameterSpec( |
| ellipticCurve, |
| new ECPoint( |
| ecP.getG().getAffineXCoord().toBigInteger(), |
| ecP.getG().getAffineYCoord().toBigInteger()), |
| ecP.getN(), |
| ecP.getH().intValue()); |
| } |
| |
| ASN1Encodable privKey = info.parsePrivateKey(); |
| if (privKey instanceof ASN1Integer) |
| { |
| ASN1Integer derD = ASN1Integer.getInstance(privKey); |
| |
| this.d = derD.getValue(); |
| } |
| else |
| { |
| org.bouncycastle.asn1.sec.ECPrivateKey ec = org.bouncycastle.asn1.sec.ECPrivateKey.getInstance(privKey); |
| |
| this.d = ec.getKey(); |
| this.publicKey = ec.getPublicKey(); |
| } |
| } |
| |
| 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() |
| { |
| X962Parameters params; |
| |
| if (ecSpec instanceof ECNamedCurveSpec) |
| { |
| ASN1ObjectIdentifier curveOid = ECUtil.getNamedCurveOid(((ECNamedCurveSpec)ecSpec).getName()); |
| if (curveOid == null) // guess it's the OID |
| { |
| curveOid = new ASN1ObjectIdentifier(((ECNamedCurveSpec)ecSpec).getName()); |
| } |
| |
| params = new X962Parameters(curveOid); |
| } |
| else if (ecSpec == null) |
| { |
| params = new X962Parameters(DERNull.INSTANCE); |
| } |
| else |
| { |
| ECCurve curve = EC5Util.convertCurve(ecSpec.getCurve()); |
| |
| X9ECParameters ecP = new X9ECParameters( |
| curve, |
| EC5Util.convertPoint(curve, ecSpec.getGenerator(), withCompression), |
| ecSpec.getOrder(), |
| BigInteger.valueOf(ecSpec.getCofactor()), |
| ecSpec.getCurve().getSeed()); |
| |
| params = new X962Parameters(ecP); |
| } |
| |
| PrivateKeyInfo info; |
| org.bouncycastle.asn1.sec.ECPrivateKey keyStructure; |
| |
| if (publicKey != null) |
| { |
| keyStructure = new org.bouncycastle.asn1.sec.ECPrivateKey(this.getS(), publicKey, params); |
| } |
| else |
| { |
| keyStructure = new org.bouncycastle.asn1.sec.ECPrivateKey(this.getS(), params); |
| } |
| |
| try |
| { |
| info = new PrivateKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.id_ecPublicKey, params), keyStructure); |
| |
| return info.getEncoded(ASN1Encoding.DER); |
| } |
| catch (IOException e) |
| { |
| return null; |
| } |
| } |
| |
| public ECParameterSpec getParams() |
| { |
| return ecSpec; |
| } |
| |
| public org.bouncycastle.jce.spec.ECParameterSpec getParameters() |
| { |
| if (ecSpec == null) |
| { |
| return null; |
| } |
| |
| return EC5Util.convertSpec(ecSpec, withCompression); |
| } |
| |
| org.bouncycastle.jce.spec.ECParameterSpec engineGetSpec() |
| { |
| if (ecSpec != null) |
| { |
| return EC5Util.convertSpec(ecSpec, withCompression); |
| } |
| |
| return configuration.getEcImplicitlyCa(); |
| } |
| |
| public BigInteger getS() |
| { |
| return d; |
| } |
| |
| public BigInteger getD() |
| { |
| return d; |
| } |
| |
| 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(); |
| } |
| |
| public void setPointFormat(String style) |
| { |
| withCompression = !("UNCOMPRESSED".equalsIgnoreCase(style)); |
| } |
| |
| public boolean equals(Object o) |
| { |
| if (!(o instanceof BCECPrivateKey)) |
| { |
| return false; |
| } |
| |
| BCECPrivateKey other = (BCECPrivateKey)o; |
| |
| return getD().equals(other.getD()) && (engineGetSpec().equals(other.engineGetSpec())); |
| } |
| |
| public int hashCode() |
| { |
| return getD().hashCode() ^ engineGetSpec().hashCode(); |
| } |
| |
| public String toString() |
| { |
| StringBuffer buf = new StringBuffer(); |
| String nl = System.getProperty("line.separator"); |
| |
| buf.append("EC Private Key").append(nl); |
| buf.append(" S: ").append(this.d.toString(16)).append(nl); |
| |
| return buf.toString(); |
| |
| } |
| |
| private DERBitString getPublicKeyDetails(BCECPublicKey pub) |
| { |
| try |
| { |
| SubjectPublicKeyInfo info = SubjectPublicKeyInfo.getInstance(ASN1Primitive.fromByteArray(pub.getEncoded())); |
| |
| return info.getPublicKeyData(); |
| } |
| catch (IOException e) |
| { // should never happen |
| return null; |
| } |
| } |
| |
| private void readObject( |
| ObjectInputStream in) |
| throws IOException, ClassNotFoundException |
| { |
| in.defaultReadObject(); |
| |
| byte[] enc = (byte[])in.readObject(); |
| |
| populateFromPrivKeyInfo(PrivateKeyInfo.getInstance(ASN1Primitive.fromByteArray(enc))); |
| |
| this.configuration = BouncyCastleProvider.CONFIGURATION; |
| this.attrCarrier = new PKCS12BagAttributeCarrierImpl(); |
| } |
| |
| private void writeObject( |
| ObjectOutputStream out) |
| throws IOException |
| { |
| out.defaultWriteObject(); |
| |
| out.writeObject(this.getEncoded()); |
| } |
| } |
