How to use

getP

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 getFieldSize()
{
  return (key.getParameters().getP().bitLength() + 7) / 8;
}

  public AsymmetricKeyParameter readKey(InputStream stream)
    throws IOException
  {
    byte[] V = new byte[(dhParams.getP().bitLength() + 7) / 8];

    Streams.readFully(stream, V, 0, V.length);

    return new DHPublicKeyParameters(new BigInteger(1, V), dhParams);
  }
}

  static int getStrength(DHParameters params)
  {
    return params.getL() != 0 ? params.getL() : params.getP().bitLength();
  }
}

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

  static int getStrength(DHParameters params)
  {
    return params.getL() != 0 ? params.getL() : params.getP().bitLength();
  }
}

  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 DHPublicKeyParameters validateDHPublicKey(DHPublicKeyParameters key) throws IOException
{
  DHParameters params = validateDHParameters(key.getParameters());
  BigInteger Y = key.getY();
  if (Y.compareTo(TWO) < 0 || Y.compareTo(params.getP().subtract(TWO)) > 0)
  {
    throw new TlsFatalAlert(AlertDescription.illegal_parameter);
  }
  // TODO See RFC 2631 for more discussion of Diffie-Hellman validation
  return key;
}

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()));
}

  protected DHParameters validateDHParameters(DHParameters params) throws IOException
  {
    if (params.getP().bitLength() < getMinimumPrimeBits())
    {
      throw new TlsFatalAlert(AlertDescription.insufficient_security);
    }

    return TlsDHUtils.validateDHParameters(params);
  }
}

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());
}

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

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());
}