Package org.bouncycastle.crypto.params

Examples of org.bouncycastle.crypto.params.DHParameters

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    }

    public AsymmetricCipherKeyPair generateKeyPair()
    {
        DHKeyGeneratorHelper helper = DHKeyGeneratorHelper.INSTANCE;
        DHParameters dhp = param.getParameters();

        BigInteger x = helper.calculatePrivate(dhp, param.getRandom());
        BigInteger y = helper.calculatePublic(dhp, x);

        return new AsymmetricCipherKeyPair(
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    public static DHPublicKeyParameters validateDHPublicKey(DHPublicKeyParameters key)
        throws IOException
    {
        BigInteger Y = key.getY();
        DHParameters params = key.getParameters();
        BigInteger p = params.getP();
        BigInteger g = params.getG();

        if (!p.isProbablePrime(2))
        {
            throw new TlsFatalAlert(AlertDescription.illegal_parameter);
        }
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        if (!signer.verifySignature(sigBytes))
        {
            throw new TlsFatalAlert(AlertDescription.decrypt_error);
        }

        this.dhAgreeServerPublicKey = validateDHPublicKey(new DHPublicKeyParameters(Ys, new DHParameters(p, g)));
    }
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        else if (algId.getObjectId().equals(PKCSObjectIdentifiers.dhKeyAgreement))
        {
            DHParameter     params = new DHParameter((ASN1Sequence)keyInfo.getAlgorithmId().getParameters());
            DERInteger      derX = (DERInteger)keyInfo.getPrivateKey();

            return new DHPrivateKeyParameters(derX.getValue(), new DHParameters(params.getP(), params.getG()));
        }
        else if (algId.getObjectId().equals(OIWObjectIdentifiers.elGamalAlgorithm))
        {
            ElGamalParameter    params = new ElGamalParameter((ASN1Sequence)keyInfo.getAlgorithmId().getParameters());
            DERInteger          derX = (DERInteger)keyInfo.getPrivateKey();
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                 || algId.getObjectId().equals(X9ObjectIdentifiers.dhpublicnumber))
        {
            DHParameter params = new DHParameter((ASN1Sequence)keyInfo.getAlgorithmId().getParameters());
            DERInteger  derY = (DERInteger)keyInfo.getPublicKey();
           
            return new DHPublicKeyParameters(derY.getValue(), new DHParameters(params.getP(), params.getG()));
        }
        else if (algId.getObjectId().equals(OIWObjectIdentifiers.elGamalAlgorithm))
        {
            ElGamalParameter    params = new ElGamalParameter((ASN1Sequence)keyInfo.getAlgorithmId().getParameters());
            DERInteger          derY = (DERInteger)keyInfo.getPublicKey();
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    }

    public AsymmetricCipherKeyPair generateKeyPair()
    {
        BigInteger      p, x, y;
        DHParameters    dhParams = param.getParameters();

        p = dhParams.getP();
        x = helper.calculatePrivate(p, param.getRandom(), dhParams.getL());
        y = helper.calculatePublic(p, dhParams.getG(), x);

        return new AsymmetricCipherKeyPair(
                new DHPublicKeyParameters(y, dhParams),
                new DHPrivateKeyParameters(x, dhParams));
    }
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        BigInteger p = safePrimes[0];
        BigInteger q = safePrimes[1];
        BigInteger g = DHParametersHelper.selectGenerator(p, q, random);

        return new DHParameters(p, g, q, TWO, null);
    }
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            {
                throw new InvalidAlgorithmParameterException("parameter object not a DHParameterSpec");
            }
            DHParameterSpec     dhParams = (DHParameterSpec)params;

            param = new DHKeyGenerationParameters(random, new DHParameters(dhParams.getP(), dhParams.getG(), null, dhParams.getL()));

            engine.init(param);
            initialised = true;
        }
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            else
            {
                pGen.init(strength, 20, new SecureRandom());
            }

            DHParameters                p = pGen.generateParameters();

            AlgorithmParameters params;

            try
            {
                params = AlgorithmParameters.getInstance("DH", "BC");
                params.init(new DHParameterSpec(p.getP(), p.getG(), l));
            }
            catch (Exception e)
            {
                throw new RuntimeException(e.getMessage());
            }
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        else if (algId.getObjectId().equals(PKCSObjectIdentifiers.dhKeyAgreement))
        {
            DHParameter     params = new DHParameter((ASN1Sequence)keyInfo.getAlgorithmId().getParameters());
            DERInteger      derX = (DERInteger)keyInfo.getPrivateKey();

            return new DHPrivateKeyParameters(derX.getValue(), new DHParameters(params.getP(), params.getG()));
        }
        else if (algId.getObjectId().equals(OIWObjectIdentifiers.elGamalAlgorithm))
        {
            ElGamalParameter    params = new ElGamalParameter((ASN1Sequence)keyInfo.getAlgorithmId().getParameters());
            DERInteger          derX = (DERInteger)keyInfo.getPrivateKey();
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Related Classes of org.bouncycastle.crypto.params.DHParameters

  • com.jcraft.jsch.bc.DH
  • org.bouncycastle.crypto.agreement.DHStandardGroups
  • org.bouncycastle.crypto.generators.DHBasicKeyPairGenerator
  • org.bouncycastle.crypto.generators.DHKeyPairGenerator
  • org.bouncycastle.crypto.generators.DHParametersGenerator
  • org.bouncycastle.crypto.generators.ElGamalKeyPairGenerator
  • org.bouncycastle.crypto.test.DHTest
  • org.bouncycastle.crypto.tls.TlsDHEKeyExchange
  • org.bouncycastle.crypto.tls.TlsDHUtils
  • org.bouncycastle.crypto.tls.TlsProtocolHandler
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