public IPasswordBasedDeriver <PbkdParameters> Build()
{
Utils.ApprovedModeCheck("PKCS12 PBE", ALGORITHM_OPENSSL);
PbkdParameters parameters = new PbkdParameters(digestAlgorithm, converter, password, iterationCount, salt);
Pkcs12ParametersGenerator gen = new Pkcs12ParametersGenerator(FipsShs.CreateDigest(parameters.Prf));
gen.Init(parameters.Password, parameters.Salt, parameters.IterationCount);
return(new PasswordBasedDeriver <PbkdParameters>(parameters, gen));
}
private static DigestRandomGenerator CreatePrng(string digestName, bool autoSeed)
{
IDigest digest = FipsShs.CreateDigest(FipsShs.Sha256);
if (digest == null)
{
return(null);
}
DigestRandomGenerator prng = new DigestRandomGenerator(digest);
if (autoSeed)
{
prng.AddSeedMaterial(NextCounterValue());
prng.AddSeedMaterial(GetNextBytes(Master, digest.GetDigestSize()));
}
return(prng);
}
private static IAsymmetricBlockCipher createCipher(bool forEncryption, IAsymmetricKey key, IParameters<Algorithm> parameters, SecureRandom random)
{
IAsymmetricBlockCipher engine = new ElGamalEngine();
ICipherParameters lwParams;
if (key is AsymmetricDHPublicKey)
{
AsymmetricDHPublicKey k = (AsymmetricDHPublicKey)key;
lwParams = new ElGamalPublicKeyParameters(k.Y, new DHParameters(k.DomainParameters.P, k.DomainParameters.G, k.DomainParameters.Q, k.DomainParameters.L));
}
else
{
AsymmetricDHPrivateKey k = (AsymmetricDHPrivateKey)key;
lwParams = new ElGamalPrivateKeyParameters(k.X, new DHParameters(k.DomainParameters.P, k.DomainParameters.G, k.DomainParameters.Q, k.DomainParameters.L));
}
if (parameters.Algorithm.Equals(WrapPkcs1v15.Algorithm))
{
engine = new Pkcs1Encoding(engine);
}
else if (parameters.Algorithm.Equals(WrapOaep.Algorithm))
{
OaepWrapParameters oeapParams = (OaepWrapParameters)parameters;
engine = new OaepEncoding(engine, FipsShs.CreateDigest(oeapParams.DigestAlgorithm), FipsShs.CreateDigest(oeapParams.MgfDigestAlgorithm), oeapParams.GetEncodingParams());
}
if (random != null)
{
lwParams = new ParametersWithRandom(lwParams, random);
}
engine.Init(forEncryption, lwParams);
return engine;
}
public ISigner CreateEngine(EngineUsage usage)
{
ISigner sig = new DsaDigestSigner(new DsaSigner(new HMacDsaKCalculator(FipsShs.CreateHmac(parameters.DigestAlgorithm))), FipsShs.CreateDigest(parameters.DigestAlgorithm));
sig.Init((usage == EngineUsage.SIGNING), sigParams);
return(sig);
}
