Examples of ECPoint

java.security.spec.ECPoint
This immutable class represents a point on an elliptic curve (EC) in affine coordinates. Other coordinate systems can extend this class to represent this point in other coordinates. @author Valerie Peng @version 1.4, 11/17/05 @since 1.5
org.bouncycastle.math.ec.ECPoint
base class for points on elliptic curves.
org.bouncycastle2.math.ec.ECPoint
base class for points on elliptic curves.
org.spongycastle.math.ec.ECPoint

Examples of org.bouncycastle.math.ec.ECPoint

        if (h.toBigInteger().signum() == 0)
        {
            h = key.getParameters().getCurve().fromBigInteger(ONE);
        }


        ECPoint R = ECAlgorithms.sumOfTwoMultiplies(key.getParameters().getG(), s, ((ECPublicKeyParameters)key).getQ(), r);


        // components must be bogus.
        if (R.isInfinity())
        {
            return false;
        }


        ECFieldElement y = h.multiply(R.getX());
        return fieldElement2Integer(key.getParameters().getN(), y).compareTo(r) == 0;
    }

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Examples of org.bouncycastle2.math.ec.ECPoint

            {
                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)
            {
                final String curveName = ((ECGenParameterSpec)params).getName();


                if (this.algorithm.equals("ECGOST3410"))
                {
                    ECDomainParameters  ecP = ECGOST3410NamedCurves.getByName(curveName);
                    if (ecP == null)
                    {
                        throw new InvalidAlgorithmParameterException("unknown curve name: " + curveName);
                    }


                    this.ecParams = new ECNamedCurveSpec(
                                                    curveName,
                                                    ecP.getCurve(),
                                                    ecP.getG(),
                                                    ecP.getN(),
                                                    ecP.getH(),
                                                    ecP.getSeed());
                }
                else
                {
                    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
                            {
                                DERObjectIdentifier oid = new DERObjectIdentifier(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;

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Examples of org.spongycastle.math.ec.ECPoint

    /**
     * Returns public key bytes from the given private key. To convert a byte array into a BigInteger, use <tt>
     * new BigInteger(1, bytes);</tt>
     */
    public static byte[] publicKeyFromPrivate(BigInteger privKey, boolean compressed) {
        ECPoint point = CURVE.getG().multiply(privKey);
        return point.getEncoded(compressed);
    }

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