diff options
Diffstat (limited to 'util/libreboot-utils/lib')
| -rw-r--r-- | util/libreboot-utils/lib/rand.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/util/libreboot-utils/lib/rand.c b/util/libreboot-utils/lib/rand.c index 8e50e110..1591a3b0 100644 --- a/util/libreboot-utils/lib/rand.c +++ b/util/libreboot-utils/lib/rand.c @@ -7,10 +7,17 @@ #ifndef RAND_H #define RAND_H -#if defined(USE_URANDOM) && \ +#if defined(USE_ARC4) && \ + ((USE_ARC4) > 0) +#define _DEFAULT_SOURCE 1 /* for arc4random on *linux* */ + /* (not needed on bsd - on bsd, + it is used automatically unless + overridden with USE_URANDOM */ +#elif defined(USE_URANDOM) && \ ((USE_URANDOM) > 0) #include <fcntl.h> /* if not arc4random: /dev/urandom */ -#elif defined(__linux__) +#elif defined(__linux__) && \ + !(defined(USE_ARC4) && ((USE_ARC4) > 0)) #ifndef _GNU_SOURCE #define _GNU_SOURCE 1 #endif @@ -134,10 +141,15 @@ rset(void *buf, size_t n) if (n == 0) exitf("rset: zero-byte request"); -#if (defined(__OpenBSD__) || defined(__FreeBSD__) || \ +/* on linux, getrandom is recommended, + but you can pass -DUSE_ARC4=1 to use arc4random. + useful for portability testing from linux. + */ +#if (defined(USE_ARC4) && ((USE_ARC4) > 0)) || \ + ((defined(__OpenBSD__) || defined(__FreeBSD__) || \ defined(__NetBSD__) || defined(__APPLE__) || \ defined(__DragonFly__)) && !(defined(USE_URANDOM) && \ - ((USE_URANDOM) > 0)) + ((USE_URANDOM) > 0))) arc4random_buf(buf, n); #else |