diff options
| author | Leah Rowe <leah@libreboot.org> | 2026-03-14 18:52:53 +0000 |
|---|---|---|
| committer | Leah Rowe <leah@libreboot.org> | 2026-03-14 18:55:14 +0000 |
| commit | b26a292d3ef4c40e5176b1aad6e6db1fae031fb6 (patch) | |
| tree | 6712b1d33664d9a476407ddde98752c30e5eeee5 /util | |
| parent | 430682d7e9e28a07c0f27375de38d798bbf4023d (diff) | |
util/nvmutil: re-add arc4random
Signed-off-by: Leah Rowe <leah@libreboot.org>
Diffstat (limited to 'util')
| -rw-r--r-- | util/nvmutil/nvmutil.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/util/nvmutil/nvmutil.c b/util/nvmutil/nvmutil.c index 3ef0d57a..9865f24b 100644 --- a/util/nvmutil/nvmutil.c +++ b/util/nvmutil/nvmutil.c @@ -15,6 +15,13 @@ * -Os -Wall -Wextra -Werror -pedantic -std=c90 */ +#if defined(__OpenBSD__) || defined(__FreeBSD__) || \ + defined(__NetBSD__) || defined(__APPLE__) +#ifndef HAVE_ARC4RANDOM_BUF +#define HAVE_ARC4RANDOM_BUF 1 +#endif +#endif + /* * I/O config (build-time) * @@ -329,7 +336,10 @@ static void set_mac_nib(size_t mac_str_pos, size_t mac_byte_pos, size_t mac_nib_pos); static ushort hextonum(char ch_s); static ushort rhex(void); +#if !defined(HAVE_ARC4RANDOM_BUF) || \ + (HAVE_ARC4RANDOM_BUF) < 1 static ulong entropy_jitter(void); +#endif static void write_mac_part(size_t partnum); /* @@ -661,6 +671,11 @@ static int post_rw_checksum[] = {0, 0}; static dev_t gbe_dev; static ino_t gbe_ino; +#if defined(HAVE_ARC4RANDOM_BUF) && \ + (HAVE_ARC4RANDOM_BUF) > 0 +void arc4random_buf(void *buf, size_t n); +#endif + int main(int argc, char *argv[]) { @@ -1246,6 +1261,22 @@ hextonum(char ch_s) return 16; /* invalid character */ } +#if defined(HAVE_ARC4RANDOM_BUF) && \ + (HAVE_ARC4RANDOM_BUF) > 0 +static ushort +rhex(void) +{ + static u8 num[12]; + static size_t n = 0; + + if (!n) { + n = 12; + arc4random_buf(num, 12); + } + + return num[--n] & 0xf; +} +#else static ushort rhex(void) { @@ -1300,6 +1331,7 @@ entropy_jitter(void) return mix; } +#endif static void write_mac_part(size_t partnum) |