Package org.bouncycastle.crypto.params

Examples of org.bouncycastle.crypto.params.ECPublicKeyParameters

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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();

            return new SubjectPublicKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.id_ecPublicKey, params), p.getOctets());
        }
        else
        {
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{
    public AsymmetricCipherKeyPair generateKeyPair()
    {
        AsymmetricCipherKeyPair pair = super.generateKeyPair();

        ECPublicKeyParameters pub = (ECPublicKeyParameters)pair.getPublic();
        ECPrivateKeyParameters priv = (ECPrivateKeyParameters)pair.getPrivate();

        pub = new ECPublicKeyParameters(pub.getQ().negate(), pub.getParameters());

        return new AsymmetricCipherKeyPair(pub, priv);
    }
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            {
                initialize(strength, new SecureRandom());
            }

            AsymmetricCipherKeyPair     pair = engine.generateKeyPair();
            ECPublicKeyParameters       pub = (ECPublicKeyParameters)pair.getPublic();
            ECPrivateKeyParameters      priv = (ECPrivateKeyParameters)pair.getPrivate();

            if (ecParams instanceof ECParameterSpec)
            {
                ECParameterSpec p = (ECParameterSpec)ecParams;
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            keyGen.init(new ECKeyGenerationParameters(privKey.getParameters(), this.random));
           
            tempPair = keyGen.generateKeyPair();

            //    BigInteger Vx = tempPair.getPublic().getW().getAffineX();
            ECPublicKeyParameters V = (ECPublicKeyParameters)tempPair.getPublic();        // get temp's public key
            BigInteger Vx = V.getQ().getX().toBigInteger();        // get the point's x coordinate
           
            r = Vx.add(e).mod(n);
        }
        while (r.equals(ECConstants.ZERO));
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        if (this.forSigning)
        {
            throw new IllegalStateException("not initialised for verifying");
        }

        ECPublicKeyParameters pubKey = (ECPublicKeyParameters)key;
        BigInteger n = pubKey.getParameters().getN();
        int nBitLength = n.bitLength();
       
        BigInteger e = new BigInteger(1, digest);
        int eBitLength = e.bitLength();
       
        if (eBitLength > nBitLength)
        {
            throw new DataLengthException("input too large for ECNR key.");
        }
       
        // r in the range [1,n-1]
        if (r.compareTo(ECConstants.ONE) < 0 || r.compareTo(n) >= 0)
        {
            return false;
        }

        // s in the range [0,n-1]           NB: ECNR spec says 0
        if (s.compareTo(ECConstants.ZERO) < 0 || s.compareTo(n) >= 0)
        {
            return false;
        }

        // compute P = sG + rW

        ECPoint G = pubKey.getParameters().getG();
        ECPoint W = pubKey.getQ();
        // calculate P using Bouncy math
        ECPoint P = ECAlgorithms.sumOfTwoMultiplies(G, s, W, r);

        // components must be bogus.
        if (P.isInfinity())
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        }

        V[0] = (byte)first;
        stream.read(V, 1, V.length - 1);

        return new ECPublicKeyParameters(ecParams.getCurve().decodePoint(V), ecParams);
    }
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        {
            throw new IllegalStateException("DSTU Key Pair Generator not initialised");
        }

        AsymmetricCipherKeyPair pair = engine.generateKeyPair();
        ECPublicKeyParameters pub = (ECPublicKeyParameters)pair.getPublic();
        ECPrivateKeyParameters priv = (ECPrivateKeyParameters)pair.getPrivate();

        if (ecParams instanceof ECParameterSpec)
        {
            ECParameterSpec p = (ECParameterSpec)ecParams;
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            if (s == null)
            {
                s = ProviderUtil.getEcImplicitlyCa();

                return new ECPublicKeyParameters(
                            ((JCEECPublicKey)k).engineGetQ(),
                            new ECDomainParameters(s.getCurve(), s.getG(), s.getN(), s.getH(), s.getSeed()));
            }
            else
            {
                return new ECPublicKeyParameters(
                            k.getQ(),
                            new ECDomainParameters(s.getCurve(), s.getG(), s.getN(), s.getH(), s.getSeed()));
            }
        }
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            keyGen.init(new ECKeyGenerationParameters(privKey.getParameters(), this.random));
           
            tempPair = keyGen.generateKeyPair();

            //    BigInteger Vx = tempPair.getPublic().getW().getAffineX();
            ECPublicKeyParameters V = (ECPublicKeyParameters)tempPair.getPublic();        // get temp's public key
            BigInteger Vx = V.getQ().getX().toBigInteger();        // get the point's x coordinate
           
            r = Vx.add(e).mod(n);
        }
        while (r.equals(ECConstants.ZERO));
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        if (this.forSigning)
        {
            throw new IllegalStateException("not initialised for verifying");
        }

        ECPublicKeyParameters pubKey = (ECPublicKeyParameters)key;
        BigInteger n = pubKey.getParameters().getN();
        int nBitLength = n.bitLength();
       
        BigInteger e = new BigInteger(1, digest);
        int eBitLength = e.bitLength();
       
        if (eBitLength > nBitLength)
        {
            throw new DataLengthException("input too large for ECNR key.");
        }
       
        // r in the range [1,n-1]
        if (r.compareTo(ECConstants.ONE) < 0 || r.compareTo(n) >= 0)
        {
            return false;
        }

        // s in the range [0,n-1]           NB: ECNR spec says 0
        if (s.compareTo(ECConstants.ZERO) < 0 || s.compareTo(n) >= 0)
        {
            return false;
        }

        // compute P = sG + rW

        ECPoint G = pubKey.getParameters().getG();
        ECPoint W = pubKey.getQ();
        // calculate P using Bouncy math
        ECPoint P = ECAlgorithms.sumOfTwoMultiplies(G, s, W, r);

        BigInteger x = P.getX().toBigInteger();
        BigInteger t = r.subtract(x).mod(n);
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Related Classes of org.bouncycastle.crypto.params.ECPublicKeyParameters

  • com.bitsofproof.supernode.common.ECKeyPair
  • com.nimbusds.jose.crypto.ECDSAVerifier
  • org.bouncycastle.crypto.agreement.ECDHBasicAgreement
  • org.bouncycastle.crypto.agreement.ECDHCBasicAgreement
  • org.bouncycastle.crypto.generators.DSTU4145KeyPairGenerator
  • org.bouncycastle.crypto.generators.ECKeyPairGenerator
  • org.bouncycastle.crypto.parsers.ECIESPublicKeyParser
  • org.bouncycastle.crypto.signers.ECNRSigner
  • org.bouncycastle.crypto.test.ECTest$ECDSA192bitPrime
  • org.bouncycastle.crypto.test.ECTest$ECDSA239bitPrime
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