SilcSKEStatus silc_ske_initiator_start(SilcSKE ske, SilcRng rng,
                                           SilcSocketConnection sock,
                                           SilcSKEStartPayload
                                              *start_payload);

    Starts the SILC Key Exchange protocol for initiator. The connection
    to the responder end must be established before calling this function
    and the connecting socket must be sent as argument. This function
    creates the Key Exchange Start Payload which includes all our
    configured security properties. This payload is then sent to the
    responder end for further processing. This payload must be sent as
    argument to the function, however, it must not be encoded
    already, it is done by this function. The caller must not free
    the `start_payload' since the SKE library will save it.

    Before calling this function application calls the
    silc_ske_assemble_security_properties which returns the `start_payload'
    which application must provide for this function.

    After calling this function the application must wait for reply
    from the responder.