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-rw-r--r--openbsc/src/libmsc/auth.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/openbsc/src/libmsc/auth.c b/openbsc/src/libmsc/auth.c
index ca39d0118..f30d56dce 100644
--- a/openbsc/src/libmsc/auth.c
+++ b/openbsc/src/libmsc/auth.c
@@ -110,8 +110,17 @@ int auth_get_tuple_for_subscr(struct gsm_auth_tuple *atuple,
}
/* Generate a new one */
+ if (rc != 0) {
+ /* If db_get_lastauthtuple_for_subscr() returned nothing, make
+ * sure the atuple memory is initialized to zero and thus start
+ * off with key_seq = 0. */
+ memset(atuple, 0, sizeof(*atuple));
+ } else {
+ /* If db_get_lastauthtuple_for_subscr() returned a previous
+ * tuple, use the next key_seq. */
+ atuple->key_seq = (atuple->key_seq + 1) % 7;
+ }
atuple->use_count = 1;
- atuple->key_seq = (atuple->key_seq + 1) % 7;
if (RAND_bytes(atuple->rand, sizeof(atuple->rand)) != 1) {
LOGP(DMM, LOGL_NOTICE, "RAND_bytes failed, can't generate new auth tuple\n");