Package org.bouncycastle.asn1.x9

Examples of org.bouncycastle.asn1.x9.X9ECParameters

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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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        throws Exception
    {
        String keyStorePass = "myPass";
        ASN1InputStream in = new ASN1InputStream(new ByteArrayInputStream(
                ecParameterEncoded));
        X9ECParameters params = new X9ECParameters((ASN1Sequence)in
                .readObject());
        KeyPair kp = null;
        boolean success = false;
        while (!success)
        {
            KeyPairGenerator kpg = KeyPairGenerator.getInstance("ECDSA");
            kpg.initialize(new ECParameterSpec(params.getCurve(),
                    params.getG(), params.getN(), params.getH(), params
                            .getSeed()));
            kp = kpg.generateKeyPair();
            // The very old Problem... we need a certificate chain to
            // save a private key...
            JCEECPublicKey pubKey = (JCEECPublicKey)kp.getPublic();
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            ECDomainParameters  dParams = null;
           
            if (params.isNamedCurve())
            {
                DERObjectIdentifier oid = (DERObjectIdentifier)params.getParameters();
                X9ECParameters      ecP = X962NamedCurves.getByOID(oid);

                dParams = new ECDomainParameters(
                                            ecP.getCurve(),
                                            ecP.getG(),
                                            ecP.getN(),
                                            ecP.getH(),
                                            ecP.getSeed());
            }
            else
            {
                X9ECParameters ecP = new X9ECParameters(
                            (ASN1Sequence)params.getParameters());
                dParams = new ECDomainParameters(
                                            ecP.getCurve(),
                                            ecP.getG(),
                                            ecP.getN(),
                                            ecP.getH(),
                                            ecP.getSeed());
            }

            ECPrivateKeyStructure   ec = new ECPrivateKeyStructure((ASN1Sequence)keyInfo.getPrivateKey());

            return new ECPrivateKeyParameters(ec.getKey(), dParams);
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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)
        {
            try
            {
                ecP = X962NamedCurves.getByOID(new DERObjectIdentifier(name));
            }
            catch (IllegalArgumentException e)
            {
                return null; // not an oid.
            }
        }
       
        if (ecP == null)
        {
            return null;
        }

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

    }
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    private TestResult encodePublicKey()
        throws Exception
    {
        ByteArrayOutputStream   bOut = new ByteArrayOutputStream();
        DEROutputStream         dOut = new DEROutputStream(bOut);
        X9ECParameters          ecP = X962NamedCurves.getByOID(X9ObjectIdentifiers.prime239v3);

        //
        // named curve
        //
        X962Parameters          params = new X962Parameters(X9ObjectIdentifiers.prime192v1);

        ASN1OctetString         p = (ASN1OctetString)(new X9ECPoint(new ECPoint.Fp(ecP.getCurve(), new ECFieldElement.Fp(BigInteger.valueOf(2), BigInteger.valueOf(1)), new ECFieldElement.Fp(BigInteger.valueOf(4), BigInteger.valueOf(3)))).getDERObject());

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

        if (!isSameAs(info.getEncoded(), namedPub))
        {
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    private TestResult encodePrivateKey()
        throws Exception
    {
        ByteArrayOutputStream   bOut = new ByteArrayOutputStream();
        DEROutputStream         dOut = new DEROutputStream(bOut);
        X9ECParameters          ecP = X962NamedCurves.getByOID(X9ObjectIdentifiers.prime239v3);

        //
        // named curve
        //
        X962Parameters          params = new X962Parameters(X9ObjectIdentifiers.prime192v1);

        ASN1OctetString         p = (ASN1OctetString)(new X9ECPoint(new ECPoint.Fp(ecP.getCurve(), new ECFieldElement.Fp(BigInteger.valueOf(2), BigInteger.valueOf(1)), new ECFieldElement.Fp(BigInteger.valueOf(4), BigInteger.valueOf(3)))).getDERObject());

        PrivateKeyInfo          info = new PrivateKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.id_ecPublicKey, params), new ECPrivateKeyStructure(BigInteger.valueOf(10)).getDERObject());

        if (!isSameAs(info.getEncoded(), namedPriv))
        {
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                throw new IllegalArgumentException("cannot convert GOST key to explicit parameters.");
            }
            else
            {
                X962Parameters params = new X962Parameters((DERObject)info.getAlgorithmId().getParameters());
                X9ECParameters curveParams;

                if (params.isNamedCurve())
                {
                    DERObjectIdentifier oid = (DERObjectIdentifier)params.getParameters();

                    curveParams = ECUtil.getNamedCurveByOid(oid);
                    // ignore seed value due to JDK bug
                    curveParams = new X9ECParameters(curveParams.getCurve(), curveParams.getG(), curveParams.getN(), curveParams.getH());
                }
                else if (params.isImplicitlyCA())
                {
                    curveParams = new X9ECParameters(ProviderUtil.getEcImplicitlyCa().getCurve(), ProviderUtil.getEcImplicitlyCa().getG(), ProviderUtil.getEcImplicitlyCa().getN(), ProviderUtil.getEcImplicitlyCa().getH());
                }
                else
                {
                    return key;   // already explicit
                }
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                throw new UnsupportedEncodingException("cannot convert GOST key to explicit parameters.");
            }
            else
            {
                X962Parameters params = new X962Parameters((DERObject)info.getAlgorithmId().getParameters());
                X9ECParameters curveParams;

                if (params.isNamedCurve())
                {
                    DERObjectIdentifier oid = (DERObjectIdentifier)params.getParameters();

                    curveParams = ECUtil.getNamedCurveByOid(oid);
                    // ignore seed value due to JDK bug
                    curveParams = new X9ECParameters(curveParams.getCurve(), curveParams.getG(), curveParams.getN(), curveParams.getH());
                }
                else if (params.isImplicitlyCA())
                {
                    curveParams = new X9ECParameters(ProviderUtil.getEcImplicitlyCa().getCurve(), ProviderUtil.getEcImplicitlyCa().getG(), ProviderUtil.getEcImplicitlyCa().getN(), ProviderUtil.getEcImplicitlyCa().getH());
                }
                else
                {
                    return key;   // already explicit
                }
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    }
   
    public static X9ECParameters getNamedCurveByOid(
        DERObjectIdentifier oid)
    {
        X9ECParameters params = X962NamedCurves.getByOID(oid);
       
        if (params == null)
        {
            params = SECNamedCurves.getByOID(oid);
            if (params == null)
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            EllipticCurve           ellipticCurve;

            if (params.isNamedCurve())
            {
                DERObjectIdentifier oid = (DERObjectIdentifier)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 = ProviderUtil.getEcImplicitlyCa().getCurve();
            }
            else
            {
                X9ECParameters          ecP = new X9ECParameters((ASN1Sequence)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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