Utilisation d'un générateur d'aléa pour l'implémentation à seuil

Un  peu de  machinerie à  mettre en  place pour  permettre l'ajout  de
fichiers arbitraires dans une implémentation.

1 files changed, 34 insertions, 0 deletions

diff --git a/src/add_threshold/random.c b/src/add_threshold/random.c
new file mode 100644
index 0000000..1bd9427
--- /dev/null
+++ b/src/add_threshold/random.c
@@ -0,0 +1,34 @@
+/*
+Implementation of the Lilliput-AE tweakable block cipher.
+
+Author: Kévin Le Gouguec, 2019.
+
+For more information, feedback or questions, refer to our website:
+https://paclido.fr/lilliput-ae
+
+To the extent possible under law, the implementer has waived all copyright
+and related or neighboring rights to the source code in this file.
+http://creativecommons.org/publicdomain/zero/1.0/
+
+---
+
+This file provides a system-specific function to generate random bytes.
+*/
+
+/* glibc < 2.25 does not provide getrandom(2): use the system call. */
+
+#define _GNU_SOURCE
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <unistd.h>
+#include <sys/syscall.h>
+
+#include "random.h"
+
+
+void randombytes(size_t nb, uint8_t out[nb])
+{
+    syscall(SYS_getrandom, out, nb, 0);
+}