Package org.bouncycastle.asn1.x9

Examples of org.bouncycastle.asn1.x9.X962Parameters

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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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                }
                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.q.getX().toBigInteger();
            BigInteger      bY = this.q.getY().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;
            }
        }
        else
        {
            if (ecSpec instanceof ECNamedCurveSpec)
            {
                ASN1ObjectIdentifier curveOid = ECUtil.getNamedCurveOid(((ECNamedCurveSpec)ecSpec).getName());
                if (curveOid == null)
                {
                    curveOid = new ASN1ObjectIdentifier(((ECNamedCurveSpec)ecSpec).getName());
                }
                params = new X962Parameters(curveOid);
            }
            else if (ecSpec == null)
            {
                params = new X962Parameters(DERNull.INSTANCE);
            }
            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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        {
            return null;
        }

        // Lazily created the first time a particular curve is accessed
        X9ECParameters ecP = SECNamedCurves.getByName(curveName);

        if (ecP == null)
        {
            return null;
        }

        // It's a bit inefficient to do this conversion every time
        return new ECDomainParameters(ecP.getCurve(), ecP.getG(), ecP.getN(), ecP.getH(), ecP.getSeed());
    }
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        }
        else if (algId.getAlgorithm().equals(X9ObjectIdentifiers.id_ecPublicKey))
        {
            X962Parameters params = new X962Parameters((ASN1Primitive)algId.getParameters());

            X9ECParameters x9;
            if (params.isNamedCurve())
            {
                ASN1ObjectIdentifier oid = ASN1ObjectIdentifier.getInstance(params.getParameters());
                x9 = X962NamedCurves.getByOID(oid);

                if (x9 == null)
                {
                    x9 = SECNamedCurves.getByOID(oid);

                    if (x9 == null)
                    {
                        x9 = NISTNamedCurves.getByOID(oid);

                        if (x9 == null)
                        {
                            x9 = TeleTrusTNamedCurves.getByOID(oid);
                        }
                    }
                }
            }
            else
            {
                x9 = X9ECParameters.getInstance(params.getParameters());
            }

            ECPrivateKey ec = ECPrivateKey.getInstance(keyInfo.parsePrivateKey());
            BigInteger d = ec.getKey();

            // TODO We lose any named parameters here

            ECDomainParameters dParams = new ECDomainParameters(
                    x9.getCurve(), x9.getG(), x9.getN(), x9.getH(), x9.getSeed());

            return new ECPrivateKeyParameters(d, dParams);
        }
        else
        {
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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 ASN1ObjectIdentifier(name));
            }
            catch (IllegalArgumentException e)
            {
                // ignore - not an oid
            }
        }
       
        if (ecP == null)
        {
            ecP = SECNamedCurves.getByName(name);
            if (ecP == null)
            {
                try
                {
                    ecP = SECNamedCurves.getByOID(new ASN1ObjectIdentifier(name));
                }
                catch (IllegalArgumentException e)
                {
                    // ignore - not an oid
                }
            }
        }

        if (ecP == null)
        {
            ecP = TeleTrusTNamedCurves.getByName(name);
            if (ecP == null)
            {
                try
                {
                    ecP = TeleTrusTNamedCurves.getByOID(new ASN1ObjectIdentifier(name));
                }
                catch (IllegalArgumentException e)
                {
                    // ignore - not an oid
                }
            }
        }

        if (ecP == null)
        {
            ecP = NISTNamedCurves.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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                throw new IllegalArgumentException("cannot convert GOST key to explicit parameters.");
            }
            else
            {
                X962Parameters params = X962Parameters.getInstance(info.getAlgorithmId().getParameters());
                X9ECParameters curveParams;

                if (params.isNamedCurve())
                {
                    ASN1ObjectIdentifier oid = ASN1ObjectIdentifier.getInstance(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(BouncyCastleProvider.CONFIGURATION.getEcImplicitlyCa().getCurve(), BouncyCastleProvider.CONFIGURATION.getEcImplicitlyCa().getG(), BouncyCastleProvider.CONFIGURATION.getEcImplicitlyCa().getN(), BouncyCastleProvider.CONFIGURATION.getEcImplicitlyCa().getH());
                }
                else
                {
                    return key;   // already explicit
                }
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                throw new UnsupportedEncodingException("cannot convert GOST key to explicit parameters.");
            }
            else
            {
                X962Parameters params = X962Parameters.getInstance(info.getAlgorithmId().getParameters());
                X9ECParameters curveParams;

                if (params.isNamedCurve())
                {
                    ASN1ObjectIdentifier oid = ASN1ObjectIdentifier.getInstance(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(BouncyCastleProvider.CONFIGURATION.getEcImplicitlyCa().getCurve(), BouncyCastleProvider.CONFIGURATION.getEcImplicitlyCa().getG(), BouncyCastleProvider.CONFIGURATION.getEcImplicitlyCa().getN(), BouncyCastleProvider.CONFIGURATION.getEcImplicitlyCa().getH());
                }
                else
                {
                    return key;   // already explicit
                }
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            {
                throw new IllegalArgumentException("error recovering public key");
            }
        }

        X9ECPoint       derQ = new X9ECPoint(ecSpec.getCurve(), key);

        this.q = derQ.getPoint();
    }
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                                            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
        {
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Related Classes of org.bouncycastle.asn1.x9.X962Parameters

  • 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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