public Pair <RootKey, ChainKey> CreateChain(IEcPublicKey theirRatchetKey, EcKeyPair ourRatchetKey)
{
byte[] sharedSecret = Curve.CalculateAgreement(theirRatchetKey, ourRatchetKey.GetPrivateKey());
byte[] derivedSecretBytes = _kdf.DeriveSecrets(sharedSecret, _key, Encoding.UTF8.GetBytes("WhisperRatchet"), DerivedRootSecrets.Size);
DerivedRootSecrets derivedSecrets = new DerivedRootSecrets(derivedSecretBytes);
RootKey newRootKey = new RootKey(_kdf, derivedSecrets.GetRootKey());
ChainKey newChainKey = new ChainKey(_kdf, derivedSecrets.GetChainKey(), 0);
return(new Pair <RootKey, ChainKey>(newRootKey, newChainKey));
}
internal DerivedKeys(RootKey rootKey, ChainKey chainKey)
{
_rootKey = rootKey;
_chainKey = chainKey;
}