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
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--- /dev/null
+++ b/src/add_threshold/random.c
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+/*
+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);
+}