Package org.bouncycastle.crypto.params

Examples of org.bouncycastle.crypto.params.ECDomainParameters

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    public BCECGOST3410PublicKey(
        String algorithm,
        ECPublicKeyParameters params,
        org.bouncycastle.jce.spec.ECParameterSpec spec)
    {
        ECDomainParameters      dp = params.getParameters();

        this.algorithm = algorithm;
        this.q = params.getQ();

        if (spec == null)
        {
            EllipticCurve ellipticCurve = EC5Util.convertCurve(dp.getCurve(), dp.getSeed());

            this.ecSpec = createSpec(ellipticCurve, dp);
        }
        else
        {
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        {
            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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                BigInteger b = readECFieldElement(prime_p.bitLength(), input);
                ECCurve curve = new ECCurve.Fp(prime_p, a, b);
                ECPoint base = deserializeECPoint(ecPointFormats, curve, TlsUtils.readOpaque8(input));
                BigInteger order = readECParameter(input);
                BigInteger cofactor = readECParameter(input);
                return new ECDomainParameters(curve, base, order, cofactor);
            }
            case ECCurveType.explicit_char2:
            {
                int m = TlsUtils.readUint16(input);
                short basis = TlsUtils.readUint8(input);
                ECCurve curve;
                switch (basis)
                {
                case ECBasisType.ec_basis_trinomial:
                {
                    int k = readECExponent(m, input);
                    BigInteger a = readECFieldElement(m, input);
                    BigInteger b = readECFieldElement(m, input);
                    curve = new ECCurve.F2m(m, k, a, b);
                    break;
                }
                case ECBasisType.ec_basis_pentanomial:
                {
                    int k1 = readECExponent(m, input);
                    int k2 = readECExponent(m, input);
                    int k3 = readECExponent(m, input);
                    BigInteger a = readECFieldElement(m, input);
                    BigInteger b = readECFieldElement(m, input);
                    curve = new ECCurve.F2m(m, k1, k2, k3, a, b);
                    break;
                }
                default:
                    throw new TlsFatalAlert(AlertDescription.illegal_parameter);
                }
                ECPoint base = deserializeECPoint(ecPointFormats, curve, TlsUtils.readOpaque8(input));
                BigInteger order = readECParameter(input);
                BigInteger cofactor = readECParameter(input);
                return new ECDomainParameters(curve, base, order, cofactor);
            }
            case ECCurveType.named_curve:
            {
                int namedCurve = TlsUtils.readUint16(input);
                if (!NamedCurve.refersToASpecificNamedCurve(namedCurve))
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     * @return a parameter spec for the curve, null if it is not available.
     */
    public static ECNamedCurveParameterSpec getParameterSpec(
        String  name)
    {
        ECDomainParameters  ecP = ECGOST3410NamedCurves.getByName(name);
        if (ecP == null)
        {
            try
            {
                ecP = ECGOST3410NamedCurves.getByOID(new ASN1ObjectIdentifier(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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            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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    public BigInteger calculateAgreement(
        CipherParameters pubKey)
    {
        ECPublicKeyParameters   pub = (ECPublicKeyParameters)pubKey;
        ECDomainParameters      params = pub.getParameters();
        ECPoint P = pub.getQ().multiply(params.getH().multiply(key.getD()));

        // if (p.isInfinity()) throw new RuntimeException("Invalid public key");

        return P.getX().toBigInteger();
    }
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            ASN1OctetString key = new DEROctetString(keyInfo.getPublicKeyData().getBytes());
            X9ECPoint derQ = new X9ECPoint(x9.getCurve(), key);

            // TODO We lose any named parameters here
           
            ECDomainParameters dParams = new ECDomainParameters(
                    x9.getCurve(), x9.getG(), x9.getN(), x9.getH(), x9.getSeed());

            return new ECPublicKeyParameters(derQ.getPoint(), dParams);
        }
        else
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            return new SubjectPublicKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.id_dsa), new ASN1Integer(pub.getY()));
        }
        else if (publicKey instanceof ECPublicKeyParameters)
        {
            ECPublicKeyParameters pub = (ECPublicKeyParameters)publicKey;
            ECDomainParameters domainParams = pub.getParameters();
            ASN1Encodable      params;

            // TODO: need to handle named curves
            if (domainParams == null)
            {
                params = new X962Parameters(DERNull.INSTANCE);      // Implicitly CA
            }
            else
            {
                X9ECParameters ecP = new X9ECParameters(
                    domainParams.getCurve(),
                    domainParams.getG(),
                    domainParams.getN(),
                    domainParams.getH(),
                    domainParams.getSeed());

                params = new X962Parameters(ecP);
            }

            ASN1OctetString p = (ASN1OctetString)new X9ECPoint(pub.getQ()).toASN1Primitive();
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            if (params instanceof ECParameterSpec)
            {
                ECParameterSpec p = (ECParameterSpec)params;
                this.ecParams = params;

                param = new ECKeyGenerationParameters(new ECDomainParameters(p.getCurve(), p.getG(), p.getN()), random);

                engine.init(param);
                initialised = true;
            }
            else if (params instanceof java.security.spec.ECParameterSpec)
            {
                java.security.spec.ECParameterSpec p = (java.security.spec.ECParameterSpec)params;
                this.ecParams = params;

                ECCurve curve = EC5Util.convertCurve(p.getCurve());
                ECPoint g = EC5Util.convertPoint(curve, p.getGenerator(), false);

                param = new ECKeyGenerationParameters(new ECDomainParameters(curve, g, p.getOrder(), BigInteger.valueOf(p.getCofactor())), random);

                engine.init(param);
                initialised = true;
            }
            else if (params instanceof ECGenParameterSpec || params instanceof ECNamedCurveGenParameterSpec)
            {
                String curveName;

                if (params instanceof ECGenParameterSpec)
                {
                    curveName = ((ECGenParameterSpec)params).getName();
                }
                else
                {
                    curveName = ((ECNamedCurveGenParameterSpec)params).getName();
                }

                X9ECParameters  ecP = X962NamedCurves.getByName(curveName);
                if (ecP == null)
                {
                    ecP = SECNamedCurves.getByName(curveName);
                    if (ecP == null)
                    {
                        ecP = NISTNamedCurves.getByName(curveName);
                    }
                    if (ecP == null)
                    {
                        ecP = TeleTrusTNamedCurves.getByName(curveName);
                    }
                    if (ecP == null)
                    {
                        // See if it's actually an OID string (SunJSSE ServerHandshaker setupEphemeralECDHKeys bug)
                        try
                        {
                            ASN1ObjectIdentifier oid = new ASN1ObjectIdentifier(curveName);
                            ecP = X962NamedCurves.getByOID(oid);
                            if (ecP == null)
                            {
                                ecP = SECNamedCurves.getByOID(oid);
                            }
                            if (ecP == null)
                            {
                                ecP = NISTNamedCurves.getByOID(oid);
                            }
                            if (ecP == null)
                            {
                                ecP = TeleTrusTNamedCurves.getByOID(oid);
                            }
                            if (ecP == null)
                            {
                                throw new InvalidAlgorithmParameterException("unknown curve OID: " + curveName);
                            }
                        }
                        catch (IllegalArgumentException ex)
                        {
                            throw new InvalidAlgorithmParameterException("unknown curve name: " + curveName);
                        }
                    }
                }

                this.ecParams = new ECNamedCurveSpec(
                            curveName,
                            ecP.getCurve(),
                            ecP.getG(),
                            ecP.getN(),
                            ecP.getH(),
                            null); // ecP.getSeed());   Work-around JDK bug -- it won't look up named curves properly if seed is present

                java.security.spec.ECParameterSpec p = (java.security.spec.ECParameterSpec)ecParams;

                ECCurve curve = EC5Util.convertCurve(p.getCurve());
                ECPoint g = EC5Util.convertPoint(curve, p.getGenerator(), false);

                param = new ECKeyGenerationParameters(new ECDomainParameters(curve, g, p.getOrder(), BigInteger.valueOf(p.getCofactor())), random);

                engine.init(param);
                initialised = true;
            }
            else if (params == null && configuration.getEcImplicitlyCa() != null)
            {
                ECParameterSpec p = configuration.getEcImplicitlyCa();
                this.ecParams = params;

                param = new ECKeyGenerationParameters(new ECDomainParameters(p.getCurve(), p.getG(), p.getN()), random);

                engine.init(param);
                initialised = true;
            }
            else if (params == null && configuration.getEcImplicitlyCa() == null)
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        String algorithm,
        ECPrivateKeyParameters params,
        BCDSTU4145PublicKey pubKey,
        ECParameterSpec spec)
    {
        ECDomainParameters dp = params.getParameters();

        this.algorithm = algorithm;
        this.d = params.getD();

        if (spec == null)
        {
            EllipticCurve ellipticCurve = EC5Util.convertCurve(dp.getCurve(), dp.getSeed());

            this.ecSpec = new ECParameterSpec(
                ellipticCurve,
                new ECPoint(
                    dp.getG().getX().toBigInteger(),
                    dp.getG().getY().toBigInteger()),
                dp.getN(),
                dp.getH().intValue());
        }
        else
        {
            this.ecSpec = spec;
        }
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Related Classes of org.bouncycastle.crypto.params.ECDomainParameters

  • com.nimbusds.jose.crypto.ECDSASigner
  • com.nimbusds.jose.crypto.ECDSAVerifier
  • org.bouncycastle.crypto.agreement.ECDHCBasicAgreement
  • org.bouncycastle.crypto.test.ECIESTest
  • org.bouncycastle.crypto.test.ECTest$ECBasicAgreementTest
  • org.bouncycastle.crypto.test.ECTest$ECDSA192bitPrime
  • org.bouncycastle.crypto.test.ECTest$ECDSA239bitPrime
  • org.bouncycastle.crypto.test.ECTest$ECDSAKeyGenTest
  • org.bouncycastle.crypto.tls.TlsECCUtils
  • org.bouncycastle.crypto.tls.TlsECDHEKeyExchange
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