Package org.bouncycastle.crypto.params

Examples of org.bouncycastle.crypto.params.DHParameters

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    public AsymmetricCipherKeyPair generateKeyPair()
    {
        BigInteger      p, g, x, y;
        int             qLength = param.getStrength() - 1;
        DHParameters    dhParams = param.getParameters();

        p = dhParams.getP();
        g = dhParams.getG();
   
        //
        // calculate the private key
        //
    x = new BigInteger(qLength, param.getRandom());
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    public AsymmetricCipherKeyPair generateKeyPair()
    {
        BigInteger      p, g, x, y;
        int             qLength = param.getStrength() - 1;
        DHParameters    dhParams = param.getParameters();

        p = dhParams.getP();
        g = dhParams.getG();
  
        //
        // calculate the private key
        //
    x = new BigInteger(qLength, param.getRandom());
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            }

            break;
        }

        return new DHParameters(p, g, q, 2);
    }
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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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            BigInteger p = new BigInteger(1, pBytes);
            BigInteger g = new BigInteger(1, gBytes);
            BigInteger Ys = new BigInteger(1, YsBytes);

            this.dhAgreeServerPublicKey = TlsDHUtils.validateDHPublicKey(new DHPublicKeyParameters(Ys,
                new DHParameters(p, g)));
        }
    }
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            DHParameter params = DHParameter.getInstance(algId.getParameters());
            ASN1Integer derX = (ASN1Integer)keyInfo.parsePrivateKey();

            BigInteger lVal = params.getL();
            int l = lVal == null ? 0 : lVal.intValue();
            DHParameters dhParams = new DHParameters(params.getP(), params.getG(), null, l);

            return new DHPrivateKeyParameters(derX.getValue(), dhParams);
        }
        else if (algId.getAlgorithm().equals(OIWObjectIdentifiers.elGamalAlgorithm))
        {
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    public AsymmetricCipherKeyPair generateKeyPair()
    {
        DHKeyGeneratorHelper helper = DHKeyGeneratorHelper.INSTANCE;
        ElGamalParameters egp = param.getParameters();
        DHParameters dhp = new DHParameters(egp.getP(), egp.getG(), null, egp.getL()); 

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

        return new AsymmetricCipherKeyPair(
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    private static DHParameters fromPG(String hexP, String hexG)
    {
        BigInteger p = new BigInteger(1, Hex.decode(hexP));
        BigInteger g = new BigInteger(1, Hex.decode(hexG));
        return new DHParameters(p, g);
    }
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    private static DHParameters fromPGQ(String hexP, String hexG, String hexQ)
    {
        BigInteger p = new BigInteger(1, Hex.decode(hexP));
        BigInteger g = new BigInteger(1, Hex.decode(hexG));
        BigInteger q = new BigInteger(1, Hex.decode(hexQ));
        return new DHParameters(p, g, q);
    }
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                // TODO Check pgenCounter size?

                validation = new DHValidationParameters(seed, pgenCounter.intValue());
            }

            return new DHPublicKeyParameters(y, new DHParameters(p, g, q, j, validation));
        }
        else if (algId.getAlgorithm().equals(PKCSObjectIdentifiers.dhKeyAgreement))
        {
            DHParameter params = DHParameter.getInstance(algId.getParameters());
            ASN1Integer derY = (ASN1Integer)keyInfo.parsePublicKey();

            BigInteger lVal = params.getL();
            int l = lVal == null ? 0 : lVal.intValue();
            DHParameters dhParams = new DHParameters(params.getP(), params.getG(), null, l);

            return new DHPublicKeyParameters(derY.getValue(), dhParams);
        }
        else if (algId.getAlgorithm().equals(OIWObjectIdentifiers.elGamalAlgorithm))
        {
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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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