private static CryptographicKey DeriveKey(CryptographicKey keyDerivationKey)
{
using (HMACSHA512 hmac = CryptoAlgorithms.CreateHMACSHA512(keyDerivationKey.GetKeyMaterial()))
{
byte[] label, context;
GetKeyDerivationParameters(out label, out context);
byte[] derivedKey = DeriveKeyImpl(hmac, label, context, keyDerivationKey.KeyLength);
return(new CryptographicKey(derivedKey));
}
}
