val xor_string : string -> string -> string
val encode_client_password : string -> string -> string
val client_authentication_packet : handshake:Mp_handshake.handshake -> capabilities:Mp_capabilities.capabilities list -> max_packet_size:int64 -> charset_number:int -> user:string -> password:string -> databasename:string -> auth_plugin_name:string -> Bitstring.bitstring