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|
(***********************************************************************)
(* *)
(* The Cryptokit library *)
(* *)
(* Xavier Leroy, projet Gallium, INRIA Paris *)
(* *)
(* Copyright 2017 Institut National de Recherche en Informatique et *)
(* en Automatique. All rights reserved. This file is distributed *)
(* under the terms of the GNU Library General Public License, with *)
(* the special exception on linking described in file LICENSE. *)
(* *)
(***********************************************************************)
(* Generate pseudorandom data on stdout, for testing with "dieharder" *)
open Cryptokit
let output_pr_data rng =
let b = Bytes.create 64 in
while true do
rng#random_bytes b 0 64;
output stdout b 0 64
done
let usage() =
prerr_string {|Usage:
./prngtest.native aes-ctr | dieharder -a -g 200
./prngtest.native chacha20 | dieharder -a -g 200
./prngtest.native hardware | dieharder -a -g 200
Warning: each dieharder run takes a long time.
|};
exit 2
let _ =
let seed =
if Array.length Sys.argv > 2
then Sys.argv.(2)
else "Supercalifragilistusexpialidolcius" in
let rng =
if Array.length Sys.argv > 1 then begin
match Sys.argv.(1) with
| "aes-ctr" -> Random.pseudo_rng_aes_ctr seed
| "chacha20" -> Random.pseudo_rng seed
| "hardware" -> Random.hardware_rng ()
| _ -> usage()
end else usage() in
output_pr_data rng
|
