From 05ac345f895098657cf44d419b5d572161ebaf43 Mon Sep 17 00:00:00 2001 From: David Carlier Date: Fri, 15 Jun 2018 13:30:09 +0000 Subject: add explicit_bzero implementation maintainer's note: past sentiment was that, despite being imperfect and unable to force clearing of all possible copies of sensitive data (e.g. in registers, register spills, signal contexts left on the stack, etc.) this function would be added if major implementations agreed on it, which has happened -- several BSDs and glibc all include it. --- src/string/explicit_bzero.c | 8 ++++++++ 1 file changed, 8 insertions(+) create mode 100644 src/string/explicit_bzero.c (limited to 'src/string') diff --git a/src/string/explicit_bzero.c b/src/string/explicit_bzero.c new file mode 100644 index 00000000..3d270040 --- /dev/null +++ b/src/string/explicit_bzero.c @@ -0,0 +1,8 @@ +#define _BSD_SOURCE +#include + +void explicit_bzero(void *d, size_t n) +{ + memset(d, 0, n); + __asm__ __volatile__ ("" : : "r"(d) : "memory"); +} -- cgit v1.2.1