test/x509aux.c: Fix argv loop

There are cases when argc is more trustable than proper argv termination.
Since we trust argc in all other test programs, we might as well treat it
the same way in this program.

Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit 780bbb96bf514f0b4013e9c5725614ba5153c497)

1 files changed, 11 insertions, 6 deletions

diff --git a/test/x509aux.c b/test/x509aux.c
index 4f00196312..2c20d6d743 100644
--- a/test/x509aux.c
+++ b/test/x509aux.c
@@ -180,7 +180,6 @@ static int test_certs(BIO *fp)
 int main(int argc, char *argv[])
 {
     BIO *bio_err;
-    const char *certfile;
     const char *p;
     int ret = 1;
 
@@ -197,24 +196,30 @@ int main(int argc, char *argv[])
         CRYPTO_set_mem_debug(1);
     CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
 
-    while ((certfile = *++argv) != NULL) {
-        BIO *f = BIO_new_file(certfile, "r");
+    argc--;
+    argv++;
+
+    while (argc >= 1) {
+        BIO *f = BIO_new_file(*argv, "r");
         int ok;
 
         if (f == NULL) {
             fprintf(stderr, "%s: Error opening cert file: '%s': %s\n",
-                    progname, certfile, strerror(errno));
+                    progname, *argv, strerror(errno));
             EXIT(ret);
         }
         ret = !(ok = test_certs(f));
         BIO_free(f);
 
         if (!ok) {
-            printf("%s ERROR\n", certfile);
+            printf("%s ERROR\n", *argv);
             ret = 1;
             break;
         }
-        printf("%s OK\n", certfile);
+        printf("%s OK\n", *argv);
+
+        argc--;
+        argv++;
     }
 
 #ifndef OPENSSL_NO_CRYPTO_MDEBUG