sig classtype rng = object method random_bytes : string -> int -> int -> unit method wipe : unit end val string : Cryptokit.Random.rng -> int -> string val secure_rng : Cryptokit.Random.rng val device_rng : string ->Cryptokit.Random.rng val egd_rng : string ->Cryptokit.Random.rng val pseudo_rng : string ->Cryptokit.Random.rng