How to use

getByOID

method

in

org.spongycastle.asn1.sec.SECNamedCurves

/**
 * return the X9ECParameters object for the named curve represented by
 * the passed in object identifier. Null if the curve isn't present.
 *
 * @param oid an object identifier representing a named curve, if present.
 */
public static X9ECParameters getByOID(
  ASN1ObjectIdentifier  oid)
{
  return SECNamedCurves.getByOID(oid);
}

/**
 * return the X9ECParameters object for the named curve represented by
 * the passed in object identifier. Null if the curve isn't present.
 *
 * @param oid an object identifier representing a named curve, if present.
 */
public static X9ECParameters getByOID(
  ASN1ObjectIdentifier  oid)
{
  return SECNamedCurves.getByOID(oid);
}

public static X9ECParameters getByName(
  String name)
{
  ASN1ObjectIdentifier oid = getOID(name);
  return oid == null ? null : getByOID(oid);
}

public static X9ECParameters getByName(
  String name)
{
  ASN1ObjectIdentifier oid = (ASN1ObjectIdentifier)objIds.get(Strings.toLowerCase(name));
  if (oid != null)
  {
    return getByOID(oid);
  }
  return null;
}

public static X9ECParameters getNamedCurveByOid(
  ASN1ObjectIdentifier oid)
{
  X9ECParameters params = X962NamedCurves.getByOID(oid);
  
  if (params == null)
  {
    params = SECNamedCurves.getByOID(oid);
    if (params == null)
    {
      params = NISTNamedCurves.getByOID(oid);
    }
    if (params == null)
    {
      params = TeleTrusTNamedCurves.getByOID(oid);
    }
  }
  return params;
}

/**
 * return a X9ECParameters object representing the passed in named
 * curve.
 *
 * @param oid the object id of the curve requested
 * @return an X9ECParameters object or null if the curve is not available.
 */
public static X9ECParameters getByOID(
  ASN1ObjectIdentifier oid)
{
  X9ECParameters ecP = X962NamedCurves.getByOID(oid);
  if (ecP == null)
  {
    ecP = SECNamedCurves.getByOID(oid);
  }
  // NOTE: All the NIST curves are currently from SEC, so no point in redundant OID lookup
  if (ecP == null)
  {
    ecP = TeleTrusTNamedCurves.getByOID(oid);
  }
  if (ecP == null)
  {
    ecP = ANSSINamedCurves.getByOID(oid);
  }
  if (ecP == null)
  {
    ecP = GMNamedCurves.getByOID(oid);
  }
  return ecP;
}

public static X9ECParameters getNamedCurveByOid(
  ASN1ObjectIdentifier oid)
{
  X9ECParameters params = CustomNamedCurves.getByOID(oid);
  if (params == null)
  {
    params = X962NamedCurves.getByOID(oid);
    if (params == null)
    {
      params = SECNamedCurves.getByOID(oid);
    }
    if (params == null)
    {
      params = NISTNamedCurves.getByOID(oid);
    }
    if (params == null)
    {
      params = TeleTrusTNamedCurves.getByOID(oid);
    }
    if (params == null)
    {
      params = ANSSINamedCurves.getByOID(oid);
    }
    if (params == null)
    {
      params = GMNamedCurves.getByOID(oid);
    }
  }
  return params;
}

ecP = SECNamedCurves.getByOID(new ASN1ObjectIdentifier(name));

if (ecP == null)
  ecP = SECNamedCurves.getByOID(oid);

x9 = SECNamedCurves.getByOID(oid);

x9 = SECNamedCurves.getByOID(oid);