public KdfResult Kdf(KdfParameterHkdf param, BitString fixedInfo)
{
var kdf = _hkdfFactory.GetKdf(ShaAttributes.GetHashFunctionFromEnum(param.HmacAlg));
var result = kdf.DeriveKey(param.Salt, param.Z, fixedInfo, param.L / BitString.BITSINBYTE);
if (result.Success)
{
return(new KdfResult(result.DerivedKey));
}
return(new KdfResult(result.ErrorMessage));
}
public KdfMultiExpansionResult Kdf(KdfMultiExpansionParameterHkdf param)
{
var kdf = _hkdfFactory.GetKdf(ShaAttributes.GetHashFunctionFromEnum(param.HmacAlg));
List <KdfResult> result = new List <KdfResult>();
foreach (var iterationParameter in param.IterationParameters)
{
result.Add(kdf.DeriveKey(param.Salt, param.Z, iterationParameter.FixedInfo, iterationParameter.L / BitString.BITSINBYTE));
}
return(new KdfMultiExpansionResult(result));
}
public ITlsKdf_v1_3 GetInstance(HashFunctions hashFunction)
{
var hf = ShaAttributes.GetHashFunctionFromEnum(hashFunction);
return(new TlsKdfv13(_hkdfFactory.GetKdf(hf), _shaFactory.GetShaInstance(hf), hf.OutputLen));
}