Function client_handshake_ntor_v1 

fn client_handshake_ntor_v1<R>(
    rng: &mut R,
    relay_public: &NtorPublicKey,
) -> Result<(NtorHandshakeState, Vec<u8>)>
where
    R: RngCore + CryptoRng,

Perform a client handshake, generating an onionskin and a state object