How to use

getG

method

in

org.spongycastle.crypto.params.DHParameters

protected boolean areCompatibleParameters(DHParameters a, DHParameters b)
{
  return a.getP().equals(b.getP()) && a.getG().equals(b.getG());
}

  public int hashCode()
  {
    return getP().hashCode() ^ getG().hashCode() ^ (getQ() != null ? getQ().hashCode() : 0);
  }
}

  public int hashCode()
  {
    return getP().hashCode() ^ getG().hashCode() ^ (getQ() != null ? getQ().hashCode() : 0);
  }
}

  BigInteger calculatePublic(DHParameters dhParams, BigInteger x)
  {
    return dhParams.getG().modPow(x, dhParams.getP());
  }
}

  BigInteger calculatePublic(DHParameters dhParams, BigInteger x)
  {
    return dhParams.getG().modPow(x, dhParams.getP());
  }
}

public static boolean areCompatibleParameters(DHParameters a, DHParameters b)
{
  return a.getP().equals(b.getP()) && a.getG().equals(b.getG())
    && (a.getQ() == null || b.getQ() == null || a.getQ().equals(b.getQ()));
}

public static DHParameters validateDHParameters(DHParameters params) throws IOException
{
  BigInteger p = params.getP();
  BigInteger g = params.getG();
  if (!p.isProbablePrime(2))
  {
    throw new TlsFatalAlert(AlertDescription.illegal_parameter);
  }
  if (g.compareTo(TWO) < 0 || g.compareTo(p.subtract(TWO)) > 0)
  {
    throw new TlsFatalAlert(AlertDescription.illegal_parameter);
  }
  return params;
}

public boolean equals(
  Object  obj)
{
  if (!(obj instanceof DHParameters))
  {
    return false;
  }
  DHParameters    pm = (DHParameters)obj;
  if (this.getQ() != null)
  {
    if (!this.getQ().equals(pm.getQ()))
    {
      return false;
    }
  }
  else
  {
    if (pm.getQ() != null)
    {
      return false;
    }
  }
  return pm.getP().equals(p) && pm.getG().equals(g);
}

public boolean equals(
  Object  obj)
{
  if (!(obj instanceof DHParameters))
  {
    return false;
  }
  DHParameters    pm = (DHParameters)obj;
  if (this.getQ() != null)
  {
    if (!this.getQ().equals(pm.getQ()))
    {
      return false;
    }
  }
  else
  {
    if (pm.getQ() != null)
    {
      return false;
    }
  }
  return pm.getP().equals(p) && pm.getG().equals(g);
}

public CramerShoupParameters generateParameters(DHParameters dhParams)
{
  BigInteger p = dhParams.getP();
  BigInteger g1 = dhParams.getG();
  // now we just need a second generator
  BigInteger g2 = ParametersHelper.selectGenerator(p, random);
  while (g1.equals(g2))
  {
    g2 = ParametersHelper.selectGenerator(p, random);
  }
  return new CramerShoupParameters(p, g1, g2, new SHA256Digest());
}

protected AlgorithmParameters engineGenerateParameters()
{
  DHParametersGenerator pGen = new DHParametersGenerator();
  if (random != null)
  {
    pGen.init(strength, 20, random);
  }
  else
  {
    pGen.init(strength, 20, new SecureRandom());
  }
  DHParameters p = pGen.generateParameters();
  AlgorithmParameters params;
  try
  {
    params = AlgorithmParameters.getInstance("DH", BouncyCastleProvider.PROVIDER_NAME);
    params.init(new DHParameterSpec(p.getP(), p.getG(), l));
  }
  catch (Exception e)
  {
    throw new RuntimeException(e.getMessage());
  }
  return params;
}

JCEDHPublicKey(
  DHPublicKeyParameters  params)
{
  this.y = params.getY();
  this.dhSpec = new DHParameterSpec(params.getParameters().getP(), params.getParameters().getG(), params.getParameters().getL());
}

/**
 * Encode this {@link ServerDHParams} to an {@link OutputStream}.
 * 
 * @param output
 *            the {@link OutputStream} to encode to.
 * @throws IOException
 */
public void encode(OutputStream output) throws IOException
{
  DHParameters dhParameters = publicKey.getParameters();
  BigInteger Ys = publicKey.getY();
  TlsDHUtils.writeDHParameter(dhParameters.getP(), output);
  TlsDHUtils.writeDHParameter(dhParameters.getG(), output);
  TlsDHUtils.writeDHParameter(Ys, output);
}

JCEDHPrivateKey(
  DHPrivateKeyParameters  params)
{
  this.x = params.getX();
  this.dhSpec = new DHParameterSpec(params.getParameters().getP(), params.getParameters().getG(), params.getParameters().getL());
}

BCDHPrivateKey(
  DHPrivateKeyParameters params)
{
  this.x = params.getX();
  this.dhSpec = new DHParameterSpec(params.getParameters().getP(), params.getParameters().getG(), params.getParameters().getL());
}

BCDHPublicKey(
  DHPublicKeyParameters params)
{
  this.y = params.getY();
  this.dhSpec = new DHParameterSpec(params.getParameters().getP(), params.getParameters().getG(), params.getParameters().getL());
}

JCEDHPublicKey(
  DHPublicKeyParameters  params)
{
  this.y = params.getY();
  this.dhSpec = new DHParameterSpec(params.getParameters().getP(), params.getParameters().getG(), params.getParameters().getL());
}

BCDHPrivateKey(
  DHPrivateKeyParameters params)
{
  this.x = params.getX();
  this.dhSpec = new DHParameterSpec(params.getParameters().getP(), params.getParameters().getG(), params.getParameters().getL());
}

BCDHPublicKey(
  DHPublicKeyParameters params)
{
  this.y = params.getY();
  this.dhSpec = new DHParameterSpec(params.getParameters().getP(), params.getParameters().getG(), params.getParameters().getL());
  this.dhPublicKey = params;
}

JCEDHPrivateKey(
  DHPrivateKeyParameters  params)
{
  this.x = params.getX();
  this.dhSpec = new DHParameterSpec(params.getParameters().getP(), params.getParameters().getG(), params.getParameters().getL());
}