Package org.bouncycastle.asn1.x9

Examples of org.bouncycastle.asn1.x9.X9ECParameters

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    }

    JCEECPublicKey(
        SubjectPublicKeyInfo    info)
    {
        X962Parameters          params = new X962Parameters((DERObject)info.getAlgorithmId().getParameters());

        if (params.isNamedCurve())
        {
            DERObjectIdentifier oid = (DERObjectIdentifier)params.getParameters();
            X9ECParameters      ecP = X962NamedCurves.getByOID(oid);

            ecSpec = new ECNamedCurveParameterSpec(
                                        X962NamedCurves.getName(oid),
                                        ecP.getCurve(),
                                        ecP.getG(),
                                        ecP.getN(),
                                        ecP.getH(),
                                        ecP.getSeed());
        }
        else
        {
            X9ECParameters ecP = new X9ECParameters(
                        (ASN1Sequence)params.getParameters());
            ecSpec = new ECParameterSpec(
                                        ecP.getCurve(),
                                        ecP.getG(),
                                        ecP.getN(),
                                        ecP.getH(),
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    public byte[] getEncoded()
    {
        ByteArrayOutputStream   bOut = new ByteArrayOutputStream();
        DEROutputStream         dOut = new DEROutputStream(bOut);
        X962Parameters          params = null;

        if (ecSpec instanceof ECNamedCurveParameterSpec)
        {
            params = new X962Parameters(X962NamedCurves.getOID(((ECNamedCurveParameterSpec)ecSpec).getName()));
        }
        else
        {
            X9ECParameters          ecP = new X9ECParameters(
                                            ecSpec.getCurve(),
                                            ecSpec.getG(),
                                            ecSpec.getN(),
                                            ecSpec.getH(),
                                            ecSpec.getSeed());
            params = new X962Parameters(ecP);
        }

        ASN1OctetString    p = (ASN1OctetString)(new X9ECPoint(this.getQ()).getDERObject());

        SubjectPublicKeyInfo info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.id_ecPublicKey, params.getDERObject()), p.getOctets());

        try
        {
            dOut.writeObject(info);
            dOut.close();
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        X962Parameters          params = new X962Parameters((DERObject)info.getAlgorithmId().getParameters());

        if (params.isNamedCurve())
        {
            DERObjectIdentifier oid = (DERObjectIdentifier)params.getParameters();
            X9ECParameters      ecP = X962NamedCurves.getByOID(oid);

            ecSpec = new ECNamedCurveParameterSpec(
                                        X962NamedCurves.getName(oid),
                                        ecP.getCurve(),
                                        ecP.getG(),
                                        ecP.getN(),
                                        ecP.getH(),
                                        ecP.getSeed());
        }
        else
        {
            X9ECParameters ecP = new X9ECParameters(
                        (ASN1Sequence)params.getParameters());
            ecSpec = new ECParameterSpec(
                                        ecP.getCurve(),
                                        ecP.getG(),
                                        ecP.getN(),
                                        ecP.getH(),
                                        ecP.getSeed());
        }

        DERBitString    bits = info.getPublicKeyData();
        byte[]          data = bits.getBytes();
    ASN1OctetString  key = new DEROctetString(data);
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        {
            params = new X962Parameters(X962NamedCurves.getOID(((ECNamedCurveParameterSpec)ecSpec).getName()));
        }
        else
        {
            X9ECParameters          ecP = new X9ECParameters(
                                            ecSpec.getCurve(),
                                            ecSpec.getG(),
                                            ecSpec.getN(),
                                            ecSpec.getH(),
                                            ecSpec.getSeed());
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        X962Parameters      params = new X962Parameters((DERObject)info.getAlgorithmId().getParameters());

        if (params.isNamedCurve())
        {
            DERObjectIdentifier oid = (DERObjectIdentifier)params.getParameters();
            X9ECParameters      ecP = X962NamedCurves.getByOID(oid);

            ecSpec = new ECNamedCurveParameterSpec(
                                        X962NamedCurves.getName(oid),
                                        ecP.getCurve(),
                                        ecP.getG(),
                                        ecP.getN(),
                                        ecP.getH(),
                                        ecP.getSeed());
        }
        else
        {
            X9ECParameters          ecP = new X9ECParameters((ASN1Sequence)params.getParameters());
            ecSpec = new ECParameterSpec(ecP.getCurve(),
                                            ecP.getG(),
                                            ecP.getN(),
                                            ecP.getH(),
                                            ecP.getSeed());
        }

        if (info.getPrivateKey() instanceof DERInteger)
        {
            DERInteger          derD = (DERInteger)info.getPrivateKey();
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        {
            params = new X962Parameters(X962NamedCurves.getOID(((ECNamedCurveParameterSpec)ecSpec).getName()));
        }
        else
        {
            X9ECParameters          ecP = new X9ECParameters(
                                            ecSpec.getCurve(),
                                            ecSpec.getG(),
                                            ecSpec.getN(),
                                            ecSpec.getH(),
                                            ecSpec.getSeed());
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     * @return a parameter spec for the curve, null if it is not available.
     */
    public static ECNamedCurveParameterSpec getParameterSpec(
        String  name)
    {
        X9ECParameters  ecP = X962NamedCurves.getByName(name);
        if (ecP == null)
        {
            return null;
        }

        return new ECNamedCurveParameterSpec(
                                        name,
                                        ecP.getCurve(),
                                        ecP.getG(),
                                        ecP.getN(),
                                        ecP.getH(),
                                        ecP.getSeed());

    }
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        X962Parameters params = new X962Parameters((ASN1Primitive)info.getPrivateKeyAlgorithm().getParameters());

        if (params.isNamedCurve())
        {
            ASN1ObjectIdentifier oid = ASN1ObjectIdentifier.getInstance(params.getParameters());
            X9ECParameters ecP = ECUtil.getNamedCurveByOid(oid);

            if (ecP == null) // GOST Curve
            {
                ECDomainParameters gParam = ECGOST3410NamedCurves.getByOID(oid);
                EllipticCurve ellipticCurve = EC5Util.convertCurve(gParam.getCurve(), gParam.getSeed());

                ecSpec = new ECNamedCurveSpec(
                        ECGOST3410NamedCurves.getName(oid),
                        ellipticCurve,
                        new ECPoint(
                                gParam.getG().getX().toBigInteger(),
                                gParam.getG().getY().toBigInteger()),
                        gParam.getN(),
                        gParam.getH());
            }
            else
            {
                EllipticCurve ellipticCurve = EC5Util.convertCurve(ecP.getCurve(), 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;
        }
        else
        {
            X9ECParameters      ecP = X9ECParameters.getInstance(params.getParameters());
            EllipticCurve       ellipticCurve = EC5Util.convertCurve(ecP.getCurve(), ecP.getSeed());

            this.ecSpec = new ECParameterSpec(
                ellipticCurve,
                new ECPoint(
                        ecP.getG().getX().toBigInteger(),
                        ecP.getG().getY().toBigInteger()),
                ecP.getN(),
                ecP.getH().intValue());
        }

        ASN1Encodable privKey = info.parsePrivateKey();
        if (privKey instanceof DERInteger)
        {
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        }
        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());
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            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 = BouncyCastleProvider.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);
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Related Classes of org.bouncycastle.asn1.x9.X9ECParameters

  • com.nimbusds.jose.crypto.ECDSAProvider
  • com.nimbusds.jose.crypto.ECDSASigner
  • com.nimbusds.jose.crypto.ECDSAVerifier
  • org.bouncycastle.asn1.ASN1Encodable
  • org.bouncycastle.asn1.ASN1EncodableVector
  • org.bouncycastle.asn1.ASN1Integer
  • org.bouncycastle.asn1.ASN1ObjectIdentifier
  • org.bouncycastle.asn1.ASN1SequenceParser
  • org.bouncycastle.asn1.BERSequence
  • org.bouncycastle.asn1.BERTaggedObject
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