| 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.ECPublicKey; |
| import java.security.spec.ECParameterSpec; |
| import java.security.spec.ECPoint; |
| import java.security.spec.ECPublicKeySpec; |
| import java.security.spec.EllipticCurve; |
| |
| import org.bouncycastle.asn1.ASN1Encodable; |
| import org.bouncycastle.asn1.ASN1ObjectIdentifier; |
| import org.bouncycastle.asn1.ASN1OctetString; |
| import org.bouncycastle.asn1.ASN1Primitive; |
| import org.bouncycastle.asn1.DERBitString; |
| import org.bouncycastle.asn1.DERNull; |
| import org.bouncycastle.asn1.DEROctetString; |
| 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.X9ECPoint; |
| import org.bouncycastle.asn1.x9.X9IntegerConverter; |
| import org.bouncycastle.asn1.x9.X9ObjectIdentifiers; |
| import org.bouncycastle.crypto.params.ECDomainParameters; |
| import org.bouncycastle.crypto.params.ECPublicKeyParameters; |
| import org.bouncycastle.jcajce.provider.asymmetric.util.KeyUtil; |
| import org.bouncycastle.jcajce.provider.config.ProviderConfiguration; |
| import org.bouncycastle.jce.interfaces.ECPointEncoder; |
| import org.bouncycastle.jce.provider.BouncyCastleProvider; |
| import org.bouncycastle.jce.spec.ECNamedCurveSpec; |
| import org.bouncycastle.math.ec.ECCurve; |
| |
| public class BCECPublicKey |
| implements ECPublicKey, org.bouncycastle.jce.interfaces.ECPublicKey, ECPointEncoder |
| { |
| static final long serialVersionUID = 2422789860422731812L; |
| |
| private String algorithm = "EC"; |
| private boolean withCompression; |
| |
| private transient org.bouncycastle.math.ec.ECPoint q; |
| private transient ECParameterSpec ecSpec; |
| private transient ProviderConfiguration configuration; |
| |
| public BCECPublicKey( |
| String algorithm, |
| BCECPublicKey key) |
| { |
| this.algorithm = algorithm; |
| this.q = key.q; |
| this.ecSpec = key.ecSpec; |
| this.withCompression = key.withCompression; |
| this.configuration = key.configuration; |
| } |
| |
| public BCECPublicKey( |
| String algorithm, |
| ECPublicKeySpec spec, |
| ProviderConfiguration configuration) |
| { |
| this.algorithm = algorithm; |
| this.ecSpec = spec.getParams(); |
| this.q = EC5Util.convertPoint(ecSpec, spec.getW(), false); |
| this.configuration = configuration; |
| } |
| |
| public BCECPublicKey( |
| String algorithm, |
| org.bouncycastle.jce.spec.ECPublicKeySpec spec, |
| ProviderConfiguration configuration) |
| { |
| this.algorithm = algorithm; |
| this.q = spec.getQ(); |
| |
| if (spec.getParams() != null) // can be null if implictlyCa |
| { |
| ECCurve curve = spec.getParams().getCurve(); |
| EllipticCurve ellipticCurve = EC5Util.convertCurve(curve, spec.getParams().getSeed()); |
| |
| this.ecSpec = EC5Util.convertSpec(ellipticCurve, spec.getParams()); |
| } |
| else |
| { |
| if (q.getCurve() == null) |
| { |
| org.bouncycastle.jce.spec.ECParameterSpec s = configuration.getEcImplicitlyCa(); |
| |
| q = s.getCurve().createPoint(q.getX().toBigInteger(), q.getY().toBigInteger(), false); |
| } |
| this.ecSpec = null; |
| } |
| |
| this.configuration = configuration; |
| } |
| |
| public BCECPublicKey( |
| String algorithm, |
| ECPublicKeyParameters params, |
| ECParameterSpec spec, |
| ProviderConfiguration configuration) |
| { |
| ECDomainParameters dp = params.getParameters(); |
| |
| this.algorithm = algorithm; |
| this.q = params.getQ(); |
| |
| if (spec == null) |
| { |
| EllipticCurve ellipticCurve = EC5Util.convertCurve(dp.getCurve(), dp.getSeed()); |
| |
| this.ecSpec = createSpec(ellipticCurve, dp); |
| } |
| else |
| { |
| this.ecSpec = spec; |
| } |
| |
| this.configuration = configuration; |
| } |
| |
| public BCECPublicKey( |
| String algorithm, |
| ECPublicKeyParameters params, |
| org.bouncycastle.jce.spec.ECParameterSpec spec, |
| ProviderConfiguration configuration) |
| { |
| ECDomainParameters dp = params.getParameters(); |
| |
| this.algorithm = algorithm; |
| this.q = params.getQ(); |
| |
| if (spec == null) |
| { |
| EllipticCurve ellipticCurve = EC5Util.convertCurve(dp.getCurve(), dp.getSeed()); |
| |
| this.ecSpec = createSpec(ellipticCurve, dp); |
| } |
| else |
| { |
| EllipticCurve ellipticCurve = EC5Util.convertCurve(spec.getCurve(), spec.getSeed()); |
| |
| this.ecSpec = EC5Util.convertSpec(ellipticCurve, spec); |
| } |
| |
| this.configuration = configuration; |
| } |
| |
| /* |
| * called for implicitCA |
| */ |
| public BCECPublicKey( |
| String algorithm, |
| ECPublicKeyParameters params, |
| ProviderConfiguration configuration) |
| { |
| this.algorithm = algorithm; |
| this.q = params.getQ(); |
| this.ecSpec = null; |
| this.configuration = configuration; |
| } |
| |
| public BCECPublicKey( |
| ECPublicKey key, |
| ProviderConfiguration configuration) |
| { |
| this.algorithm = key.getAlgorithm(); |
| this.ecSpec = key.getParams(); |
| this.q = EC5Util.convertPoint(this.ecSpec, key.getW(), false); |
| } |
| |
| BCECPublicKey( |
| String algorithm, |
| SubjectPublicKeyInfo info, |
| ProviderConfiguration configuration) |
| { |
| this.algorithm = algorithm; |
| this.configuration = configuration; |
| populateFromPubKeyInfo(info); |
| } |
| |
| private ECParameterSpec createSpec(EllipticCurve ellipticCurve, ECDomainParameters dp) |
| { |
| return new ECParameterSpec( |
| ellipticCurve, |
| new ECPoint( |
| dp.getG().getX().toBigInteger(), |
| dp.getG().getY().toBigInteger()), |
| dp.getN(), |
| dp.getH().intValue()); |
| } |
| |
| private void populateFromPubKeyInfo(SubjectPublicKeyInfo info) |
| { |
| X962Parameters params = new X962Parameters((ASN1Primitive)info.getAlgorithm().getParameters()); |
| ECCurve curve; |
| EllipticCurve ellipticCurve; |
| |
| if (params.isNamedCurve()) |
| { |
| ASN1ObjectIdentifier oid = (ASN1ObjectIdentifier)params.getParameters(); |
| X9ECParameters ecP = ECUtil.getNamedCurveByOid(oid); |
| |
| curve = ecP.getCurve(); |
| ellipticCurve = EC5Util.convertCurve(curve, ecP.getSeed()); |
| |
| ecSpec = new ECNamedCurveSpec( |
| ECUtil.getCurveName(oid), |
| ellipticCurve, |
| new ECPoint( |
| ecP.getG().getX().toBigInteger(), |
| ecP.getG().getY().toBigInteger()), |
| ecP.getN(), |
| ecP.getH()); |
| } |
| else if (params.isImplicitlyCA()) |
| { |
| ecSpec = null; |
| curve = configuration.getEcImplicitlyCa().getCurve(); |
| } |
| else |
| { |
| X9ECParameters ecP = X9ECParameters.getInstance(params.getParameters()); |
| |
| curve = ecP.getCurve(); |
| ellipticCurve = EC5Util.convertCurve(curve, ecP.getSeed()); |
| |
| this.ecSpec = new ECParameterSpec( |
| ellipticCurve, |
| new ECPoint( |
| ecP.getG().getX().toBigInteger(), |
| ecP.getG().getY().toBigInteger()), |
| ecP.getN(), |
| ecP.getH().intValue()); |
| } |
| |
| DERBitString bits = info.getPublicKeyData(); |
| byte[] data = bits.getBytes(); |
| ASN1OctetString key = new DEROctetString(data); |
| |
| // |
| // extra octet string - one of our old certs... |
| // |
| if (data[0] == 0x04 && data[1] == data.length - 2 |
| && (data[2] == 0x02 || data[2] == 0x03)) |
| { |
| int qLength = new X9IntegerConverter().getByteLength(curve); |
| |
| if (qLength >= data.length - 3) |
| { |
| try |
| { |
| key = (ASN1OctetString) ASN1Primitive.fromByteArray(data); |
| } |
| catch (IOException ex) |
| { |
| throw new IllegalArgumentException("error recovering public key"); |
| } |
| } |
| } |
| X9ECPoint derQ = new X9ECPoint(curve, key); |
| |
| this.q = derQ.getPoint(); |
| } |
| |
| public String getAlgorithm() |
| { |
| return algorithm; |
| } |
| |
| public String getFormat() |
| { |
| return "X.509"; |
| } |
| |
| public byte[] getEncoded() |
| { |
| ASN1Encodable params; |
| SubjectPublicKeyInfo info; |
| |
| if (ecSpec instanceof ECNamedCurveSpec) |
| { |
| ASN1ObjectIdentifier curveOid = ECUtil.getNamedCurveOid(((ECNamedCurveSpec)ecSpec).getName()); |
| if (curveOid == null) |
| { |
| 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); |
| } |
| |
| ECCurve curve = this.engineGetQ().getCurve(); |
| ASN1OctetString p = (ASN1OctetString) |
| new X9ECPoint(curve.createPoint(this.getQ().getX().toBigInteger(), this.getQ().getY().toBigInteger(), withCompression)).toASN1Primitive(); |
| |
| info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.id_ecPublicKey, params), p.getOctets()); |
| |
| return KeyUtil.getEncodedSubjectPublicKeyInfo(info); |
| } |
| |
| private void extractBytes(byte[] encKey, int offSet, BigInteger bI) |
| { |
| byte[] val = bI.toByteArray(); |
| if (val.length < 32) |
| { |
| byte[] tmp = new byte[32]; |
| System.arraycopy(val, 0, tmp, tmp.length - val.length, val.length); |
| val = tmp; |
| } |
| |
| for (int i = 0; i != 32; i++) |
| { |
| encKey[offSet + i] = val[val.length - 1 - i]; |
| } |
| } |
| |
| public ECParameterSpec getParams() |
| { |
| return ecSpec; |
| } |
| |
| public org.bouncycastle.jce.spec.ECParameterSpec getParameters() |
| { |
| if (ecSpec == null) // implictlyCA |
| { |
| return null; |
| } |
| |
| return EC5Util.convertSpec(ecSpec, withCompression); |
| } |
| |
| public ECPoint getW() |
| { |
| return new ECPoint(q.getX().toBigInteger(), q.getY().toBigInteger()); |
| } |
| |
| public org.bouncycastle.math.ec.ECPoint getQ() |
| { |
| if (ecSpec == null) |
| { |
| if (q instanceof org.bouncycastle.math.ec.ECPoint.Fp) |
| { |
| return new org.bouncycastle.math.ec.ECPoint.Fp(null, q.getX(), q.getY()); |
| } |
| else |
| { |
| return new org.bouncycastle.math.ec.ECPoint.F2m(null, q.getX(), q.getY()); |
| } |
| } |
| |
| return q; |
| } |
| |
| public org.bouncycastle.math.ec.ECPoint engineGetQ() |
| { |
| return q; |
| } |
| |
| org.bouncycastle.jce.spec.ECParameterSpec engineGetSpec() |
| { |
| if (ecSpec != null) |
| { |
| return EC5Util.convertSpec(ecSpec, withCompression); |
| } |
| |
| return configuration.getEcImplicitlyCa(); |
| } |
| |
| public String toString() |
| { |
| StringBuffer buf = new StringBuffer(); |
| String nl = System.getProperty("line.separator"); |
| |
| buf.append("EC Public Key").append(nl); |
| buf.append(" X: ").append(this.q.getX().toBigInteger().toString(16)).append(nl); |
| buf.append(" Y: ").append(this.q.getY().toBigInteger().toString(16)).append(nl); |
| |
| return buf.toString(); |
| |
| } |
| |
| public void setPointFormat(String style) |
| { |
| withCompression = !("UNCOMPRESSED".equalsIgnoreCase(style)); |
| } |
| |
| public boolean equals(Object o) |
| { |
| if (!(o instanceof BCECPublicKey)) |
| { |
| return false; |
| } |
| |
| BCECPublicKey other = (BCECPublicKey)o; |
| |
| return engineGetQ().equals(other.engineGetQ()) && (engineGetSpec().equals(other.engineGetSpec())); |
| } |
| |
| public int hashCode() |
| { |
| return engineGetQ().hashCode() ^ engineGetSpec().hashCode(); |
| } |
| |
| private void readObject( |
| ObjectInputStream in) |
| throws IOException, ClassNotFoundException |
| { |
| in.defaultReadObject(); |
| |
| byte[] enc = (byte[])in.readObject(); |
| |
| populateFromPubKeyInfo(SubjectPublicKeyInfo.getInstance(ASN1Primitive.fromByteArray(enc))); |
| |
| this.configuration = BouncyCastleProvider.CONFIGURATION; |
| } |
| |
| private void writeObject( |
| ObjectOutputStream out) |
| throws IOException |
| { |
| out.defaultWriteObject(); |
| |
| out.writeObject(this.getEncoded()); |
| } |
| } |