Package org.bouncycastle.math.ec

Examples of org.bouncycastle.math.ec.ECCurve

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            }
           
            // elliptic curve openSSL
            KeyPairGenerator g = KeyPairGenerator.getInstance("ECDSA", "BC");

            ECCurve curve = new ECCurve.Fp(
                new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839"), // q
                new BigInteger("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc", 16), // a
                new BigInteger("6b016c3bdcf18941d0d654921475ca71a9db2fb27d1d37796185c2942c0a", 16)); // b

            ECParameterSpec ecSpec = new ECParameterSpec(
                curve,
                curve.decodePoint(Hex.decode("020ffa963cdca8816ccc33b8642bedf905c3d358573d3f27fbbd3b3cb9aaaf")), // G
                new BigInteger("883423532389192164791648750360308884807550341691627752275345424702807307")); // n

            g.initialize(ecSpec, new SecureRandom());

            kp = g.generateKeyPair();
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    {
        try
        {
            KeyPairGenerator    g = KeyPairGenerator.getInstance("ECDH", "BC");

            ECCurve curve = new ECCurve.Fp(
                    new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839"), // q
                    new BigInteger("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc", 16), // a
                    new BigInteger("6b016c3bdcf18941d0d654921475ca71a9db2fb27d1d37796185c2942c0a", 16)); // b

            ECParameterSpec ecSpec = new ECParameterSpec(
                    curve,
                    curve.decodePoint(Hex.decode("020ffa963cdca8816ccc33b8642bedf905c3d358573d3f27fbbd3b3cb9aaaf")), // G
                    new BigInteger("883423532389192164791648750360308884807550341691627752275345424702807307")); // n

            g.initialize(ecSpec, new SecureRandom());

            //
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    private void testBCAPI()
        throws Exception
    {
        KeyPairGenerator g = KeyPairGenerator.getInstance("ECDSA", "BC");

        ECCurve curve = new ECCurve.Fp(
            new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839"), // q
            new BigInteger("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc", 16), // a
            new BigInteger("6b016c3bdcf18941d0d654921475ca71a9db2fb27d1d37796185c2942c0a", 16)); // b

        ECParameterSpec ecSpec = new ECParameterSpec(
            curve,
            curve.decodePoint(Hex.decode("020ffa963cdca8816ccc33b8642bedf905c3d358573d3f27fbbd3b3cb9aaaf")), // G
            new BigInteger("883423532389192164791648750360308884807550341691627752275345424702807307")); // n

        ConfigurableProvider config = (ConfigurableProvider)Security.getProvider("BC");

        config.setParameter(ConfigurableProvider.EC_IMPLICITLY_CA, ecSpec);
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        org.bouncycastle.jce.spec.ECPublicKeySpec     spec)
    {
        this.algorithm = algorithm;
        this.q = spec.getQ();
       
        ECCurve curve = spec.getParams().getCurve();
        EllipticCurve ellipticCurve;

        ellipticCurve = EC5Util.convertCurve(curve, spec.getParams().getSeed());
       
        this.ecSpec = EC5Util.convertSpec(ellipticCurve, spec.getParams());
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            gostParams = new GOST3410PublicKeyAlgParameters((ASN1Sequence)info.getAlgorithmId().getParameters());
           
            ECNamedCurveParameterSpec spec = ECGOST3410NamedCurveTable.getParameterSpec(ECGOST3410NamedCurves.getName(gostParams.getPublicKeyParamSet()));

            ECCurve curve = spec.getCurve();
            EllipticCurve ellipticCurve = EC5Util.convertCurve(curve, spec.getSeed());

            if (curve instanceof ECCurve.Fp)
            {
                this.q = new org.bouncycastle.math.ec.ECPoint.Fp(curve, new ECFieldElement.Fp(((ECCurve.Fp)curve).getQ(), new BigInteger(1, x)), new ECFieldElement.Fp(((ECCurve.Fp)curve).getQ(), new BigInteger(1, y)));
            }
            else
            {
                ECCurve.F2m curveF2m = (ECCurve.F2m) curve;
                this.q = new org.bouncycastle.math.ec.ECPoint.F2m(curveF2m, new ECFieldElement.F2m(curveF2m.getM(), curveF2m.getK1(), curveF2m.getK2(), curveF2m.getK3(), new BigInteger(1, x)), new ECFieldElement.F2m(curveF2m.getM(), curveF2m.getK1(), curveF2m.getK2(), curveF2m.getK3(), new BigInteger(1, y)), false);
            }

            ecSpec = new ECNamedCurveSpec(
                    ECGOST3410NamedCurves.getName(gostParams.getPublicKeyParamSet()),
                    ellipticCurve,
                    new ECPoint(
                            spec.getG().getX().toBigInteger(),
                            spec.getG().getY().toBigInteger()),
                            spec.getN(), spec.getH());

        }
        else
        {
            X962Parameters          params = new X962Parameters((DERObject)info.getAlgorithmId().getParameters());
            ECCurve                 curve;
            EllipticCurve           ellipticCurve;
           
            if (params.isNamedCurve())
            {
                DERObjectIdentifier oid = (DERObjectIdentifier)params.getParameters();
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            else
            {
                ECField field = ecSpec.getCurve().getField();
                X9ECParameters ecP;
                org.bouncycastle.math.ec.ECPoint ecPoint;
                ECCurve curve;

                if (field instanceof ECFieldFp)
                {                   
                    curve = new ECCurve.Fp(((ECFieldFp)field).getP(), ecSpec.getCurve().getA(), ecSpec.getCurve().getB());
                    ecPoint = new org.bouncycastle.math.ec.ECPoint.Fp(curve, curve.fromBigInteger(ecSpec.getGenerator().getAffineX()), curve.fromBigInteger(ecSpec.getGenerator().getAffineY()), withCompression);
                }
                else
                {
                    ECFieldF2m fieldF2m = (ECFieldF2m)field;
                    int ks[] = ECUtil.convertMidTerms(fieldF2m.getMidTermsOfReductionPolynomial());

                    curve = new ECCurve.F2m(fieldF2m.getM(), ks[0], ks[1], ks[2], ecSpec.getCurve().getA(), ecSpec.getCurve().getB());
                    ecPoint = new org.bouncycastle.math.ec.ECPoint.F2m(curve, curve.fromBigInteger(ecSpec.getGenerator().getAffineX()), curve.fromBigInteger(ecSpec.getGenerator().getAffineY()), withCompression);
                }

                ecP = new X9ECParameters(
                        curve,
                        ecPoint,
                        ecSpec.getOrder(),
                        BigInteger.valueOf(ecSpec.getCofactor()),
                        ecSpec.getCurve().getSeed());
                params = new X962Parameters(ecP);
            }

            ECCurve curve = this.engineGetQ().getCurve();

            if (curve instanceof ECCurve.Fp)
            {
                ASN1OctetString    p = (ASN1OctetString)(new X9ECPoint(new org.bouncycastle.math.ec.ECPoint.Fp(curve, this.getQ().getX(), this.getQ().getY(), withCompression)).getDERObject());
                info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.id_ecPublicKey, params.getDERObject()), p.getOctets());
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        byte[] kData = BigIntegers.asUnsignedByteArray(new BigInteger("700000017569056646655505781757157107570501575775705779575555657156756655"));

        SecureRandom    k = new FixedSecureRandom(kData);

        ECCurve curve = new ECCurve.Fp(
                new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839"), // q
                new BigInteger("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc", 16), // a
                new BigInteger("6b016c3bdcf18941d0d654921475ca71a9db2fb27d1d37796185c2942c0a", 16)); // b
       
        ECParameterSpec spec = new ECParameterSpec(
                curve,
                curve.decodePoint(Hex.decode("020ffa963cdca8816ccc33b8642bedf905c3d358573d3f27fbbd3b3cb9aaaf")), // G
                new BigInteger("883423532389192164791648750360308884807550341691627752275345424702807307")); // n
       
       
        ECPrivateKeySpec priKey = new ECPrivateKeySpec(
                new BigInteger("876300101507107567501066130761671078357010671067781776716671676178726717"), // d
                spec);
       
        ECPublicKeySpec pubKey = new ECPublicKeySpec(
                curve.decodePoint(Hex.decode("025b6dc53bc61a2548ffb0f671472de6c9521a9d2d2534e65abfcbd5fe0c70")), // Q
                spec);
       
        Signature           sgr = Signature.getInstance("ECDSA", "BC");
        KeyFactory          f = KeyFactory.getInstance("ECDSA", "BC");
        PrivateKey          sKey = f.generatePrivate(priKey);
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        byte[] kData = BigIntegers.asUnsignedByteArray(new BigInteger("171278725565216523967285789236956265265265235675811949404040041670216363"));

        SecureRandom    k = new FixedSecureRandom(kData);

        ECCurve curve = new ECCurve.F2m(
            239, // m
            36, // k
            new BigInteger("32010857077C5431123A46B808906756F543423E8D27877578125778AC76", 16), // a
            new BigInteger("790408F2EEDAF392B012EDEFB3392F30F4327C0CA3F31FC383C422AA8C16", 16)); // b
   
        ECParameterSpec params = new ECParameterSpec(
            curve,
            curve.decodePoint(Hex.decode("0457927098FA932E7C0A96D3FD5B706EF7E5F5C156E16B7E7C86038552E91D61D8EE5077C33FECF6F1A16B268DE469C3C7744EA9A971649FC7A9616305")), // G
            new BigInteger("220855883097298041197912187592864814557886993776713230936715041207411783"), // n
            BigInteger.valueOf(4)); // h
   
        ECPrivateKeySpec priKeySpec = new ECPrivateKeySpec(
            new BigInteger("145642755521911534651321230007534120304391871461646461466464667494947990"), // d
            params);
       
        ECPublicKeySpec pubKeySpec = new ECPublicKeySpec(
            curve.decodePoint(Hex.decode("045894609CCECF9A92533F630DE713A958E96C97CCB8F5ABB5A688A238DEED6DC2D9D0C94EBFB7D526BA6A61764175B99CB6011E2047F9F067293F57F5")), // Q
            params);
   
        Signature   sgr = Signature.getInstance("ECDSA", "BC");
        KeyFactory  f = KeyFactory.getInstance("ECDSA", "BC");
        PrivateKey  sKey = f.generatePrivate(priKeySpec);
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        // ECDSA Fp generation test
        //
        s = Signature.getInstance("ECDSA", "BC");
        g = KeyPairGenerator.getInstance("ECDSA", "BC");

        ECCurve curve = new ECCurve.Fp(
            new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839"), // q
            new BigInteger("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc", 16), // a
            new BigInteger("6b016c3bdcf18941d0d654921475ca71a9db2fb27d1d37796185c2942c0a", 16)); // b

        ECParameterSpec ecSpec = new ECParameterSpec(
            curve,
            curve.decodePoint(Hex.decode("020ffa963cdca8816ccc33b8642bedf905c3d358573d3f27fbbd3b3cb9aaaf")), // G
            new BigInteger("883423532389192164791648750360308884807550341691627752275345424702807307")); // n

        g.initialize(ecSpec, new SecureRandom());

        p = g.generateKeyPair();

        sKey = p.getPrivate();
        vKey = p.getPublic();

        s.initSign(sKey);

        s.update(data);

        sigBytes = s.sign();

        s = Signature.getInstance("ECDSA", "BC");

        s.initVerify(vKey);

        s.update(data);

        if (!s.verify(sigBytes))
        {
            fail("ECDSA verification failed");
        }
       
        //
        // ECDSA F2m generation test
        //
        s = Signature.getInstance("ECDSA", "BC");
        g = KeyPairGenerator.getInstance("ECDSA", "BC");

        curve = new ECCurve.F2m(
                239, // m
                36, // k
                new BigInteger("32010857077C5431123A46B808906756F543423E8D27877578125778AC76", 16), // a
                new BigInteger("790408F2EEDAF392B012EDEFB3392F30F4327C0CA3F31FC383C422AA8C16", 16)); // b
       
        ecSpec = new ECParameterSpec(
            curve,
            curve.decodePoint(Hex.decode("0457927098FA932E7C0A96D3FD5B706EF7E5F5C156E16B7E7C86038552E91D61D8EE5077C33FECF6F1A16B268DE469C3C7744EA9A971649FC7A9616305")), // G
            new BigInteger("220855883097298041197912187592864814557886993776713230936715041207411783"), // n
            BigInteger.valueOf(4)); // h
       
        g.initialize(ecSpec, new SecureRandom());
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        org.bouncycastle.jce.spec.ECPrivateKeySpec     spec)
    {
        this.algorithm = algorithm;
        this.d = spec.getD();
       
        ECCurve curve = spec.getParams().getCurve();
        EllipticCurve ellipticCurve = EC5Util.convertCurve(curve, spec.getParams().getSeed());
       
        this.ecSpec = new ECParameterSpec(
                                ellipticCurve,
                                new ECPoint(
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Related Classes of org.bouncycastle.math.ec.ECCurve

  • com.nimbusds.jose.crypto.ECDSAVerifier
  • org.bouncycastle.crypto.tls.TlsECCUtils
  • org.bouncycastle.jcajce.provider.asymmetric.dstu.BCDSTU4145PrivateKey
  • org.bouncycastle.jcajce.provider.asymmetric.dstu.BCDSTU4145PublicKey
  • org.bouncycastle.jcajce.provider.asymmetric.dstu.KeyPairGeneratorSpi
  • org.bouncycastle.jcajce.provider.asymmetric.ec.BCECPrivateKey
  • org.bouncycastle.jcajce.provider.asymmetric.ec.BCECPublicKey
  • org.bouncycastle.jcajce.provider.asymmetric.ec.KeyPairGeneratorSpi$EC
  • org.bouncycastle.jcajce.provider.asymmetric.ecgost.BCECGOST3410PrivateKey
  • org.bouncycastle.jcajce.provider.asymmetric.ecgost.BCECGOST3410PublicKey
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