/// <summary>
/// Generate a new set of DSA domain parameters.
/// </summary>
/// <returns>A new set of DSADomainParameters</returns>
public DsaDomainParameters GenerateDomainParameters()
{
if (parameters.P != null)
{
byte[] seed = parameters.GetSeed();
if (seed != null && parameters.UsageIndex >= 0)
{
BigInteger g = DsaParametersGenerator.CalculateGenerator_FIPS186_3_Verifiable(FipsShs.CreateDigest(digestAlgorithm), parameters.P, parameters.Q, seed, parameters.UsageIndex);
return(new DsaDomainParameters(parameters.P, parameters.Q, g, new Org.BouncyCastle.Crypto.Asymmetric.DsaValidationParameters(seed, -1, parameters.UsageIndex)));
}
else
{
BigInteger g = DsaParametersGenerator.CalculateGenerator_FIPS186_3_Unverifiable(parameters.P, parameters.Q, random);
return(new DsaDomainParameters(parameters.P, parameters.Q, g, null));
}
}
else
{
DsaParametersGenerator pGen = new DsaParametersGenerator(FipsShs.CreateDigest(digestAlgorithm));
DsaParameterGenerationParameters dsaGenParameters = new DsaParameterGenerationParameters(
parameters.L, parameters.N, parameters.Certainty, random, parameters.UsageIndex);
pGen.Init(dsaGenParameters);
DsaParameters p = pGen.GenerateParameters();
Org.BouncyCastle.Crypto.Internal.Parameters.DsaValidationParameters validationParameters = p.ValidationParameters;
return(new DsaDomainParameters(p.P, p.Q, p.G, new Org.BouncyCastle.Crypto.Asymmetric.DsaValidationParameters(validationParameters.GetSeed(), validationParameters.Counter, validationParameters.UsageIndex)));
}
}
