diff options
Diffstat (limited to 'lib/util/genrand.c')
| -rw-r--r-- | lib/util/genrand.c | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/lib/util/genrand.c b/lib/util/genrand.c index 18ffa0d95e6..fd6f457d27d 100644 --- a/lib/util/genrand.c +++ b/lib/util/genrand.c @@ -20,6 +20,7 @@ */ #include "replace.h" +#include "lib/util/fault.h" #include "lib/util/genrand.h" #include <gnutls/gnutls.h> @@ -31,10 +32,26 @@ * https://nikmav.blogspot.com/2017/03/improving-by-simplifying-gnutls-prng.html */ + +_NORETURN_ static void genrand_panic(int err, + const char *location, + const char *func) +{ + char buf[200]; + snprintf(buf, sizeof(buf), + "%s:%s: GnuTLS could not generate a random buffer: %s [%d]\n", + location, func, gnutls_strerror_name(err), err); + smb_panic(buf); +} + + _PUBLIC_ void generate_random_buffer(uint8_t *out, int len) { /* Random number generator for temporary keys. */ - gnutls_rnd(GNUTLS_RND_RANDOM, out, len); + int ret = gnutls_rnd(GNUTLS_RND_RANDOM, out, len); + if (ret != 0) { + genrand_panic(ret, __location__, __func__); + } } _PUBLIC_ void generate_secret_buffer(uint8_t *out, int len) @@ -48,7 +65,10 @@ _PUBLIC_ void generate_secret_buffer(uint8_t *out, int len) * the limit for a re-seed. For its re-seed it mixes mixes data obtained * from the OS random device with the previous key. */ - gnutls_rnd(GNUTLS_RND_KEY, out, len); + int ret = gnutls_rnd(GNUTLS_RND_KEY, out, len); + if (ret != 0) { + genrand_panic(ret, __location__, __func__); + } } _PUBLIC_ void generate_nonce_buffer(uint8_t *out, int len) @@ -60,5 +80,8 @@ _PUBLIC_ void generate_nonce_buffer(uint8_t *out, int len) * bytes (typically few megabytes), or after few hours of operation * without reaching the limit has passed. */ - gnutls_rnd(GNUTLS_RND_NONCE, out, len); + int ret = gnutls_rnd(GNUTLS_RND_NONCE, out, len); + if (ret != 0) { + genrand_panic(ret, __location__, __func__); + } } |