| package org.bouncycastle.jcajce.provider.asymmetric.dstu; |
| |
| 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.ASN1Sequence; |
| import org.bouncycastle.asn1.DERBitString; |
| import org.bouncycastle.asn1.DEROctetString; |
| import org.bouncycastle.asn1.ua.DSTU4145BinaryField; |
| import org.bouncycastle.asn1.ua.DSTU4145ECBinary; |
| import org.bouncycastle.asn1.ua.DSTU4145NamedCurves; |
| import org.bouncycastle.asn1.ua.DSTU4145Params; |
| import org.bouncycastle.asn1.ua.DSTU4145PointEncoder; |
| import org.bouncycastle.asn1.ua.UAObjectIdentifiers; |
| 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.crypto.params.ECDomainParameters; |
| import org.bouncycastle.crypto.params.ECPublicKeyParameters; |
| import org.bouncycastle.jcajce.provider.asymmetric.util.EC5Util; |
| import org.bouncycastle.jcajce.provider.asymmetric.util.KeyUtil; |
| import org.bouncycastle.jce.interfaces.ECPointEncoder; |
| import org.bouncycastle.jce.provider.BouncyCastleProvider; |
| import org.bouncycastle.jce.spec.ECNamedCurveParameterSpec; |
| import org.bouncycastle.jce.spec.ECNamedCurveSpec; |
| import org.bouncycastle.math.ec.ECCurve; |
| |
| public class BCDSTU4145PublicKey |
| implements ECPublicKey, org.bouncycastle.jce.interfaces.ECPublicKey, ECPointEncoder |
| { |
| static final long serialVersionUID = 7026240464295649314L; |
| |
| private String algorithm = "DSTU4145"; |
| private boolean withCompression; |
| |
| private transient org.bouncycastle.math.ec.ECPoint q; |
| private transient ECParameterSpec ecSpec; |
| private transient DSTU4145Params dstuParams; |
| |
| public BCDSTU4145PublicKey( |
| BCDSTU4145PublicKey key) |
| { |
| this.q = key.q; |
| this.ecSpec = key.ecSpec; |
| this.withCompression = key.withCompression; |
| this.dstuParams = key.dstuParams; |
| } |
| |
| public BCDSTU4145PublicKey( |
| ECPublicKeySpec spec) |
| { |
| this.ecSpec = spec.getParams(); |
| this.q = EC5Util.convertPoint(ecSpec, spec.getW(), false); |
| } |
| |
| public BCDSTU4145PublicKey( |
| org.bouncycastle.jce.spec.ECPublicKeySpec spec) |
| { |
| 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 = BouncyCastleProvider.CONFIGURATION.getEcImplicitlyCa(); |
| |
| q = s.getCurve().createPoint(q.getAffineXCoord().toBigInteger(), q.getAffineYCoord().toBigInteger()); |
| } |
| this.ecSpec = null; |
| } |
| } |
| |
| public BCDSTU4145PublicKey( |
| String algorithm, |
| ECPublicKeyParameters params, |
| ECParameterSpec spec) |
| { |
| 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; |
| } |
| } |
| |
| public BCDSTU4145PublicKey( |
| String algorithm, |
| ECPublicKeyParameters params, |
| org.bouncycastle.jce.spec.ECParameterSpec spec) |
| { |
| 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); |
| } |
| } |
| |
| /* |
| * called for implicitCA |
| */ |
| public BCDSTU4145PublicKey( |
| String algorithm, |
| ECPublicKeyParameters params) |
| { |
| this.algorithm = algorithm; |
| this.q = params.getQ(); |
| this.ecSpec = null; |
| } |
| |
| private ECParameterSpec createSpec(EllipticCurve ellipticCurve, ECDomainParameters dp) |
| { |
| return new ECParameterSpec( |
| ellipticCurve, |
| new ECPoint( |
| dp.getG().getAffineXCoord().toBigInteger(), |
| dp.getG().getAffineYCoord().toBigInteger()), |
| dp.getN(), |
| dp.getH().intValue()); |
| } |
| |
| public BCDSTU4145PublicKey( |
| ECPublicKey key) |
| { |
| this.algorithm = key.getAlgorithm(); |
| this.ecSpec = key.getParams(); |
| this.q = EC5Util.convertPoint(this.ecSpec, key.getW(), false); |
| } |
| |
| BCDSTU4145PublicKey( |
| SubjectPublicKeyInfo info) |
| { |
| populateFromPubKeyInfo(info); |
| } |
| |
| private void reverseBytes(byte[] bytes) |
| { |
| byte tmp; |
| |
| for (int i = 0; i < bytes.length / 2; i++) |
| { |
| tmp = bytes[i]; |
| bytes[i] = bytes[bytes.length - 1 - i]; |
| bytes[bytes.length - 1 - i] = tmp; |
| } |
| } |
| |
| private void populateFromPubKeyInfo(SubjectPublicKeyInfo info) |
| { |
| DERBitString bits = info.getPublicKeyData(); |
| ASN1OctetString key; |
| this.algorithm = "DSTU4145"; |
| |
| try |
| { |
| key = (ASN1OctetString)ASN1Primitive.fromByteArray(bits.getBytes()); |
| } |
| catch (IOException ex) |
| { |
| throw new IllegalArgumentException("error recovering public key"); |
| } |
| |
| byte[] keyEnc = key.getOctets(); |
| |
| if (info.getAlgorithm().getAlgorithm().equals(UAObjectIdentifiers.dstu4145le)) |
| { |
| reverseBytes(keyEnc); |
| } |
| |
| dstuParams = DSTU4145Params.getInstance((ASN1Sequence)info.getAlgorithm().getParameters()); |
| |
| //ECNamedCurveParameterSpec spec = ECGOST3410NamedCurveTable.getParameterSpec(ECGOST3410NamedCurves.getName(gostParams.getPublicKeyParamSet())); |
| org.bouncycastle.jce.spec.ECParameterSpec spec = null; |
| if (dstuParams.isNamedCurve()) |
| { |
| ASN1ObjectIdentifier curveOid = dstuParams.getNamedCurve(); |
| ECDomainParameters ecP = DSTU4145NamedCurves.getByOID(curveOid); |
| |
| spec = new ECNamedCurveParameterSpec(curveOid.getId(), ecP.getCurve(), ecP.getG(), ecP.getN(), ecP.getH(), ecP.getSeed()); |
| } |
| else |
| { |
| DSTU4145ECBinary binary = dstuParams.getECBinary(); |
| byte[] b_bytes = binary.getB(); |
| if (info.getAlgorithm().getAlgorithm().equals(UAObjectIdentifiers.dstu4145le)) |
| { |
| reverseBytes(b_bytes); |
| } |
| DSTU4145BinaryField field = binary.getField(); |
| ECCurve curve = new ECCurve.F2m(field.getM(), field.getK1(), field.getK2(), field.getK3(), binary.getA(), new BigInteger(1, b_bytes)); |
| byte[] g_bytes = binary.getG(); |
| if (info.getAlgorithm().getAlgorithm().equals(UAObjectIdentifiers.dstu4145le)) |
| { |
| reverseBytes(g_bytes); |
| } |
| spec = new org.bouncycastle.jce.spec.ECParameterSpec(curve, DSTU4145PointEncoder.decodePoint(curve, g_bytes), binary.getN()); |
| } |
| |
| ECCurve curve = spec.getCurve(); |
| EllipticCurve ellipticCurve = EC5Util.convertCurve(curve, spec.getSeed()); |
| |
| //this.q = curve.createPoint(new BigInteger(1, x), new BigInteger(1, y), false); |
| this.q = DSTU4145PointEncoder.decodePoint(curve, keyEnc); |
| |
| if (dstuParams.isNamedCurve()) |
| { |
| ecSpec = new ECNamedCurveSpec( |
| dstuParams.getNamedCurve().getId(), |
| ellipticCurve, |
| new ECPoint( |
| spec.getG().getAffineXCoord().toBigInteger(), |
| spec.getG().getAffineYCoord().toBigInteger()), |
| spec.getN(), spec.getH()); |
| } |
| else |
| { |
| ecSpec = new ECParameterSpec( |
| ellipticCurve, |
| new ECPoint( |
| spec.getG().getAffineXCoord().toBigInteger(), |
| spec.getG().getAffineYCoord().toBigInteger()), |
| spec.getN(), spec.getH().intValue()); |
| } |
| } |
| |
| public byte[] getSbox() |
| { |
| if (null != dstuParams) |
| { |
| return dstuParams.getDKE(); |
| } |
| else |
| { |
| return DSTU4145Params.getDefaultDKE(); |
| } |
| } |
| |
| public String getAlgorithm() |
| { |
| return algorithm; |
| } |
| |
| public String getFormat() |
| { |
| return "X.509"; |
| } |
| |
| public byte[] getEncoded() |
| { |
| ASN1Encodable params; |
| SubjectPublicKeyInfo info; |
| |
| if (dstuParams != null) |
| { |
| params = dstuParams; |
| } |
| else |
| { |
| if (ecSpec instanceof ECNamedCurveSpec) |
| { |
| params = new DSTU4145Params(new ASN1ObjectIdentifier(((ECNamedCurveSpec)ecSpec).getName())); |
| } |
| else |
| { // strictly speaking this may not be applicable... |
| 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); |
| } |
| } |
| |
| byte[] encKey = DSTU4145PointEncoder.encodePoint(this.q); |
| |
| try |
| { |
| info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(UAObjectIdentifiers.dstu4145be, params), new DEROctetString(encKey)); |
| } |
| catch (IOException e) |
| { |
| return null; |
| } |
| |
| return KeyUtil.getEncodedSubjectPublicKeyInfo(info); |
| } |
| |
| 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.getAffineXCoord().toBigInteger(), q.getAffineYCoord().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.getAffineXCoord(), q.getAffineYCoord()); |
| } |
| else |
| { |
| return new org.bouncycastle.math.ec.ECPoint.F2m(null, q.getAffineXCoord(), q.getAffineYCoord()); |
| } |
| } |
| |
| 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 BouncyCastleProvider.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.getAffineXCoord().toBigInteger().toString(16)).append(nl); |
| buf.append(" Y: ").append(this.q.getAffineYCoord().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 BCDSTU4145PublicKey)) |
| { |
| return false; |
| } |
| |
| BCDSTU4145PublicKey other = (BCDSTU4145PublicKey)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))); |
| } |
| |
| private void writeObject( |
| ObjectOutputStream out) |
| throws IOException |
| { |
| out.defaultWriteObject(); |
| |
| out.writeObject(this.getEncoded()); |
| } |
| } |
