public override string generatePublicKey(byte[] server_pub_key)
{
byte[] client_pub_key;
if (Sodium.GenerateChacha20Secrets(server_pub_key, out client_pub_key,
out enc_key_, out enc_nonce_, out dec_nonce_))
{
return(Sodium.Hexify(client_pub_key));
}
return("");
}