diff options
Diffstat (limited to 'source4/heimdal/lib/hcrypto/rand-unix.c')
-rw-r--r-- | source4/heimdal/lib/hcrypto/rand-unix.c | 38 |
1 files changed, 10 insertions, 28 deletions
diff --git a/source4/heimdal/lib/hcrypto/rand-unix.c b/source4/heimdal/lib/hcrypto/rand-unix.c index fcad39f1de..4c1f33da59 100644 --- a/source4/heimdal/lib/hcrypto/rand-unix.c +++ b/source4/heimdal/lib/hcrypto/rand-unix.c @@ -42,9 +42,6 @@ #include "randi.h" -static int random_fd = -1; -static HEIMDAL_MUTEX random_mutex = HEIMDAL_MUTEX_INITIALIZER; - /* * Unix /dev/random */ @@ -93,44 +90,29 @@ static int unix_bytes(unsigned char *outdata, int size) { ssize_t count; - int once = 0; + int fd; if (size < 0) return 0; else if (size == 0) return 1; - HEIMDAL_MUTEX_lock(&random_mutex); - if (random_fd == -1) { - retry: - random_fd = get_device_fd(O_RDONLY); - if (random_fd < 0) { - HEIMDAL_MUTEX_unlock(&random_mutex); - return 0; - } - } + fd = get_device_fd(O_RDONLY); + if (fd < 0) + return 0; while (size > 0) { - HEIMDAL_MUTEX_unlock(&random_mutex); - count = read (random_fd, outdata, size); - HEIMDAL_MUTEX_lock(&random_mutex); - if (random_fd < 0) { - if (errno == EINTR) - continue; - else if (errno == EBADF && once++ == 0) { - close(random_fd); - random_fd = -1; - goto retry; - } - return 0; - } else if (count <= 0) { - HEIMDAL_MUTEX_unlock(&random_mutex); + count = read(fd, outdata, size); + if (count < 0 && errno == EINTR) + continue; + else if (count <= 0) { + close(fd); return 0; } outdata += count; size -= count; } - HEIMDAL_MUTEX_unlock(&random_mutex); + close(fd); return 1; } |