Package org.bouncycastle.math.ec

Examples of org.bouncycastle.math.ec.ECPoint

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                {
                    k = new BigInteger(nBitLength, random);
                }
                while (k.equals(ZERO) || k.compareTo(n) >= 0);

                ECPoint p = key.getParameters().getG().multiply(k);

                // 5.3.3
                BigInteger x = p.getX().toBigInteger();

                r = x.mod(n);
            }
            while (r.equals(ZERO));
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        BigInteger c = s.modInverse(n);

        BigInteger u1 = e.multiply(c).mod(n);
        BigInteger u2 = r.multiply(c).mod(n);

        ECPoint G = key.getParameters().getG();
        ECPoint Q = ((ECPublicKeyParameters)key).getQ();

        ECPoint point = ECAlgorithms.sumOfTwoMultiplies(G, u1, Q, u2);

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

        BigInteger v = point.getX().toBigInteger().mod(n);

        return v.equals(r);
    }
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        {
            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();
            }

            //ECDomainParameters ecP = ECGOST3410NamedCurves.getByName(curveName);
            ECDomainParameters ecP = DSTU4145NamedCurves.getByOID(new ASN1ObjectIdentifier(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());

            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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        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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                {
                    k = new BigInteger(n.bitLength(), random);
                }
                while (k.equals(ECConstants.ZERO));

                ECPoint p = key.getParameters().getG().multiply(k);

                BigInteger x = p.getX().toBigInteger();

                r = x.mod(n);
            }
            while (r.equals(ECConstants.ZERO));
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        BigInteger v = e.modInverse(n);

        BigInteger z1 = s.multiply(v).mod(n);
        BigInteger z2 = (n.subtract(r)).multiply(v).mod(n);

        ECPoint G = key.getParameters().getG(); // P
        ECPoint Q = ((ECPublicKeyParameters)key).getQ();

        ECPoint point = ECAlgorithms.sumOfTwoMultiplies(G, z1, Q, z2);

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

        BigInteger R = point.getX().toBigInteger().mod(n);

        return R.equals(r);
    }
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                {
                    k = new BigInteger(nBitLength, random);
                }
                while (k.equals(ZERO));

                ECPoint p = key.getParameters().getG().multiply(k);

                // 5.3.3
                BigInteger x = p.getX().toBigInteger();

                r = x.mod(n);
            }
            while (r.equals(ZERO));
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        BigInteger c = s.modInverse(n);

        BigInteger u1 = e.multiply(c).mod(n);
        BigInteger u2 = r.multiply(c).mod(n);

        ECPoint G = key.getParameters().getG();
        ECPoint Q = ((ECPublicKeyParameters)key).getQ();

        ECPoint point = ECAlgorithms.sumOfTwoMultiplies(G, u1, Q, u2);

        BigInteger v = point.getX().toBigInteger().mod(n);

        return v.equals(r);
    }
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                {
                    k = new BigInteger(n.bitLength(), random);
                }
                while (k.equals(ECConstants.ZERO));

                ECPoint p = key.getParameters().getG().multiply(k);

                BigInteger x = p.getX().toBigInteger();

                r = x.mod(n);
            }
            while (r.equals(ECConstants.ZERO));
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        BigInteger v = e.modInverse(n);

        BigInteger z1 = s.multiply(v).mod(n);
        BigInteger z2 = (n.subtract(r)).multiply(v).mod(n);

        ECPoint G = key.getParameters().getG(); // P
        ECPoint Q = ((ECPublicKeyParameters)key).getQ();

        ECPoint point = ECAlgorithms.sumOfTwoMultiplies(G, z1, Q, z2);

        BigInteger R = point.getX().toBigInteger().mod(n);

        return R.equals(r);
    }
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  • org.bouncycastle.crypto.ec.ECNewPublicKeyTransform
  • org.bouncycastle.crypto.ec.ECNewRandomnessTransform
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