Function s2n_tls_sys::s2n_negotiate

pub unsafe extern "C" fn s2n_negotiate(
    conn: *mut s2n_connection,
    blocked: *mut Type
) -> c_int

Performs the initial “handshake” phase of a TLS connection and must be called before any s2n_recv() or s2n_send() calls.

@note When using client authentication with TLS1.3, s2n_negotiate() will report a successful handshake to clients before the server validates the client certificate. If the server then rejects the client certificate, the client may later receive an alert while calling s2n_recv, potentially after already having sent application data with s2n_send.

See the following example for guidance on calling s2n_negotiate(): https://github.com/aws/s2n-tls/blob/main/docs/examples/s2n_negotiate.c

@param conn A pointer to the s2n_connection object @param blocked A pointer which will be set to the blocked status if an S2N_ERR_T_BLOCKED error is returned. @returns S2N_SUCCESS if the handshake completed. S2N_FAILURE if the handshake encountered an error or is blocked.