| package org.bouncycastle.jcajce.provider.asymmetric.ecgost; |
| |
| 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.ASN1OctetString; |
| import org.bouncycastle.asn1.ASN1Primitive; |
| import org.bouncycastle.asn1.DERBitString; |
| import org.bouncycastle.asn1.DEROctetString; |
| import org.bouncycastle.asn1.cryptopro.CryptoProObjectIdentifiers; |
| import org.bouncycastle.asn1.cryptopro.ECGOST3410NamedCurves; |
| import org.bouncycastle.asn1.cryptopro.GOST3410PublicKeyAlgParameters; |
| 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.ECUtil; |
| import org.bouncycastle.jcajce.provider.asymmetric.util.KeyUtil; |
| import org.bouncycastle.jcajce.provider.config.ProviderConfiguration; |
| import org.bouncycastle.jce.ECGOST3410NamedCurveTable; |
| 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; |
| import org.bouncycastle.util.Strings; |
| |
| public class BCECGOST3410PublicKey |
| implements ECPublicKey, org.bouncycastle.jce.interfaces.ECPublicKey, ECPointEncoder |
| { |
| static final long serialVersionUID = 7026240464295649314L; |
| |
| private String algorithm = "ECGOST3410"; |
| private boolean withCompression; |
| |
| private transient ECPublicKeyParameters ecPublicKey; |
| private transient ECParameterSpec ecSpec; |
| private transient GOST3410PublicKeyAlgParameters gostParams; |
| |
| public BCECGOST3410PublicKey( |
| BCECGOST3410PublicKey key) |
| { |
| this.ecPublicKey = key.ecPublicKey; |
| this.ecSpec = key.ecSpec; |
| this.withCompression = key.withCompression; |
| this.gostParams = key.gostParams; |
| } |
| |
| public BCECGOST3410PublicKey( |
| ECPublicKeySpec spec) |
| { |
| this.ecSpec = spec.getParams(); |
| this.ecPublicKey = new ECPublicKeyParameters(EC5Util.convertPoint(ecSpec, spec.getW(), false), EC5Util.getDomainParameters(null, spec.getParams())); |
| } |
| |
| public BCECGOST3410PublicKey( |
| org.bouncycastle.jce.spec.ECPublicKeySpec spec, |
| ProviderConfiguration configuration) |
| { |
| if (spec.getParams() != null) // can be null if implictlyCa |
| { |
| ECCurve curve = spec.getParams().getCurve(); |
| EllipticCurve ellipticCurve = EC5Util.convertCurve(curve, spec.getParams().getSeed()); |
| |
| // this may seem a little long-winded but it's how we pick up the custom curve. |
| this.ecPublicKey = new ECPublicKeyParameters( |
| spec.getQ(), ECUtil.getDomainParameters(configuration, spec.getParams())); |
| this.ecSpec = EC5Util.convertSpec(ellipticCurve, spec.getParams()); |
| } |
| else |
| { |
| org.bouncycastle.jce.spec.ECParameterSpec s = configuration.getEcImplicitlyCa(); |
| |
| this.ecPublicKey = new ECPublicKeyParameters(s.getCurve().createPoint(spec.getQ().getAffineXCoord().toBigInteger(), spec.getQ().getAffineYCoord().toBigInteger()), EC5Util.getDomainParameters(configuration, (ECParameterSpec)null)); |
| this.ecSpec = null; |
| } |
| } |
| |
| public BCECGOST3410PublicKey( |
| String algorithm, |
| ECPublicKeyParameters params, |
| ECParameterSpec spec) |
| { |
| ECDomainParameters dp = params.getParameters(); |
| |
| this.algorithm = algorithm; |
| this.ecPublicKey = params; |
| |
| if (spec == null) |
| { |
| EllipticCurve ellipticCurve = EC5Util.convertCurve(dp.getCurve(), dp.getSeed()); |
| |
| this.ecSpec = createSpec(ellipticCurve, dp); |
| } |
| else |
| { |
| this.ecSpec = spec; |
| } |
| } |
| |
| public BCECGOST3410PublicKey( |
| String algorithm, |
| ECPublicKeyParameters params, |
| org.bouncycastle.jce.spec.ECParameterSpec spec) |
| { |
| ECDomainParameters dp = params.getParameters(); |
| |
| this.algorithm = algorithm; |
| this.ecPublicKey = params; |
| |
| 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 BCECGOST3410PublicKey( |
| String algorithm, |
| ECPublicKeyParameters params) |
| { |
| this.algorithm = algorithm; |
| this.ecPublicKey = params; |
| 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 BCECGOST3410PublicKey( |
| ECPublicKey key) |
| { |
| this.algorithm = key.getAlgorithm(); |
| this.ecSpec = key.getParams(); |
| this.ecPublicKey = new ECPublicKeyParameters(EC5Util.convertPoint(this.ecSpec, key.getW(), false), EC5Util.getDomainParameters(null, key.getParams())); |
| } |
| |
| BCECGOST3410PublicKey( |
| SubjectPublicKeyInfo info) |
| { |
| populateFromPubKeyInfo(info); |
| } |
| |
| private void populateFromPubKeyInfo(SubjectPublicKeyInfo info) |
| { |
| DERBitString bits = info.getPublicKeyData(); |
| ASN1OctetString key; |
| this.algorithm = "ECGOST3410"; |
| |
| try |
| { |
| key = (ASN1OctetString)ASN1Primitive.fromByteArray(bits.getBytes()); |
| } |
| catch (IOException ex) |
| { |
| throw new IllegalArgumentException("error recovering public key"); |
| } |
| |
| byte[] keyEnc = key.getOctets(); |
| byte[] x = new byte[32]; |
| byte[] y = new byte[32]; |
| |
| for (int i = 0; i != x.length; i++) |
| { |
| x[i] = keyEnc[32 - 1 - i]; |
| } |
| |
| for (int i = 0; i != y.length; i++) |
| { |
| y[i] = keyEnc[64 - 1 - i]; |
| } |
| |
| gostParams = GOST3410PublicKeyAlgParameters.getInstance(info.getAlgorithm().getParameters()); |
| |
| ECNamedCurveParameterSpec spec = ECGOST3410NamedCurveTable.getParameterSpec(ECGOST3410NamedCurves.getName(gostParams.getPublicKeyParamSet())); |
| |
| ECCurve curve = spec.getCurve(); |
| EllipticCurve ellipticCurve = EC5Util.convertCurve(curve, spec.getSeed()); |
| |
| this.ecPublicKey = new ECPublicKeyParameters(curve.createPoint(new BigInteger(1, x), new BigInteger(1, y)), ECUtil.getDomainParameters(null, spec)); |
| |
| ecSpec = new ECNamedCurveSpec( |
| ECGOST3410NamedCurves.getName(gostParams.getPublicKeyParamSet()), |
| ellipticCurve, |
| new ECPoint( |
| spec.getG().getAffineXCoord().toBigInteger(), |
| spec.getG().getAffineYCoord().toBigInteger()), |
| spec.getN(), spec.getH()); |
| } |
| |
| public String getAlgorithm() |
| { |
| return algorithm; |
| } |
| |
| public String getFormat() |
| { |
| return "X.509"; |
| } |
| |
| public byte[] getEncoded() |
| { |
| ASN1Encodable params; |
| SubjectPublicKeyInfo info; |
| |
| if (gostParams != null) |
| { |
| params = gostParams; |
| } |
| else |
| { |
| if (ecSpec instanceof ECNamedCurveSpec) |
| { |
| params = new GOST3410PublicKeyAlgParameters( |
| ECGOST3410NamedCurves.getOID(((ECNamedCurveSpec)ecSpec).getName()), |
| CryptoProObjectIdentifiers.gostR3411_94_CryptoProParamSet); |
| } |
| 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); |
| } |
| } |
| |
| BigInteger bX = this.ecPublicKey.getQ().getAffineXCoord().toBigInteger(); |
| BigInteger bY = this.ecPublicKey.getQ().getAffineYCoord().toBigInteger(); |
| byte[] encKey = new byte[64]; |
| |
| extractBytes(encKey, 0, bX); |
| extractBytes(encKey, 32, bY); |
| |
| try |
| { |
| info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(CryptoProObjectIdentifiers.gostR3410_2001, params), new DEROctetString(encKey)); |
| } |
| catch (IOException e) |
| { |
| return null; |
| } |
| |
| 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(ecPublicKey.getQ().getAffineXCoord().toBigInteger(), ecPublicKey.getQ().getAffineYCoord().toBigInteger()); |
| } |
| |
| public org.bouncycastle.math.ec.ECPoint getQ() |
| { |
| if (ecSpec == null) |
| { |
| return ecPublicKey.getQ().getDetachedPoint(); |
| } |
| |
| return ecPublicKey.getQ(); |
| } |
| |
| ECPublicKeyParameters engineGetKeyParameters() |
| { |
| return ecPublicKey; |
| } |
| |
| 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 = Strings.lineSeparator(); |
| org.bouncycastle.math.ec.ECPoint q = ecPublicKey.getQ(); |
| |
| buf.append("EC Public Key").append(nl); |
| buf.append(" X: ").append(q.getAffineXCoord().toBigInteger().toString(16)).append(nl); |
| buf.append(" Y: ").append(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 BCECGOST3410PublicKey)) |
| { |
| return false; |
| } |
| |
| BCECGOST3410PublicKey other = (BCECGOST3410PublicKey)o; |
| |
| return ecPublicKey.getQ().equals(other.ecPublicKey.getQ()) && (engineGetSpec().equals(other.engineGetSpec())); |
| } |
| |
| public int hashCode() |
| { |
| return ecPublicKey.getQ().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()); |
| } |
| |
| public GOST3410PublicKeyAlgParameters getGostParams() |
| { |
| return gostParams; |
| } |
| } |