diff options
Diffstat (limited to 'openbsd-compat/arc4random.c')
| -rw-r--r-- | openbsd-compat/arc4random.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/openbsd-compat/arc4random.c b/openbsd-compat/arc4random.c index 046f57e6..578f69f4 100644 --- a/openbsd-compat/arc4random.c +++ b/openbsd-compat/arc4random.c @@ -33,6 +33,10 @@ #include <string.h> #include <unistd.h> +#ifdef HAVE_SYS_RANDOM_H +# include <sys/random.h> +#endif + #ifndef HAVE_ARC4RANDOM #ifdef WITH_OPENSSL @@ -78,8 +82,9 @@ _rs_init(u_char *buf, size_t n) } #ifndef WITH_OPENSSL -#define SSH_RANDOM_DEV "/dev/urandom" -/* XXX use getrandom() if supported on Linux */ +# ifndef SSH_RANDOM_DEV +# define SSH_RANDOM_DEV "/dev/urandom" +# endif /* SSH_RANDOM_DEV */ static void getrnd(u_char *s, size_t len) { @@ -87,6 +92,11 @@ getrnd(u_char *s, size_t len) ssize_t r; size_t o = 0; +#ifdef HAVE_GETRANDOM + if ((r = getrandom(s, len, 0)) > 0 && (size_t)r == len) + return; +#endif /* HAVE_GETRANDOM */ + if ((fd = open(SSH_RANDOM_DEV, O_RDONLY)) == -1) fatal("Couldn't open %s: %s", SSH_RANDOM_DEV, strerror(errno)); while (o < len) { @@ -101,7 +111,7 @@ getrnd(u_char *s, size_t len) } close(fd); } -#endif +#endif /* WITH_OPENSSL */ static void _rs_stir(void) @@ -110,8 +120,8 @@ _rs_stir(void) #ifdef WITH_OPENSSL if (RAND_bytes(rnd, sizeof(rnd)) <= 0) - fatal("Couldn't obtain random bytes (error %ld)", - ERR_get_error()); + fatal("Couldn't obtain random bytes (error 0x%lx)", + (unsigned long)ERR_get_error()); #else getrnd(rnd, sizeof(rnd)); #endif |