private static byte[] PRF(TlsKdfWithPrfParameters parameters, int size)
{
byte[] label = Strings.ToByteArray(parameters.Label);
byte[] labelSeed = Arrays.Concatenate(label, parameters.SeedMaterial);
IMac prfMac = FipsShs.CreateHmac(parameters.Prf);
byte[] buf = new byte[size];
hmac_hash(prfMac, parameters.Secret, labelSeed, buf);
return(buf);
}
public IKdfCalculator <TlsKdfWithPrfParameters> From(byte[] secret, string label, params byte[][] seedMaterial)
{
TlsKdfWithPrfParameters parameters = new TlsKdfWithPrfParameters(algorithm, prf, Arrays.Clone(secret), label, concatenate(seedMaterial));
return(new Tls12KdfFactory(parameters));
}
