Check # of arguments for remaining commands.

Reviewed-by: NPaul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/4201)

apps/enc.c

@@ -263,6 +263,10 @@ int enc_main(int argc, char **argv)
             break;
         }
     }
+    if (opt_num_rest() != 0) {
+        BIO_printf(bio_err, "Extra arguments given.\n");
+        goto opthelp;
+    }
 
     if (cipher && EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) {
         BIO_printf(bio_err, "%s: AEAD ciphers not supported\n", prog);

apps/genrsa.c

@@ -78,6 +78,7 @@ int genrsa_main(int argc, char **argv)
         switch (o) {
         case OPT_EOF:
         case OPT_ERR:
+opthelp:
             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
             goto end;
         case OPT_HELP:
@@ -111,11 +112,16 @@ int genrsa_main(int argc, char **argv)
     }
     argc = opt_num_rest();
     argv = opt_rest();
-    private = 1;
 
-    if (argv[0] && (!opt_int(argv[0], &num) || num <= 0))
-        goto end;
+    if (argc == 1) {
+        if (!opt_int(argv[0], &num) || num <= 0)
+            goto end;
+    } else if (argc > 0) {
+        BIO_printf(bio_err, "Extra arguments given.\n");
+        goto opthelp;
+    }
 
+    private = 1;
     if (!app_passwd(NULL, passoutarg, NULL, &passout)) {
         BIO_printf(bio_err, "Error getting password\n");
         goto end;

apps/openssl.c

@@ -388,6 +388,7 @@ int list_main(int argc, char **argv)
         switch (o) {
         case OPT_EOF:  /* Never hit, but suppresses warning */
         case OPT_ERR:
+opthelp:
             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
             return 1;
         case OPT_HELP:
@@ -429,12 +430,14 @@ int list_main(int argc, char **argv)
         }
         done = 1;
     }
-
-    if (!done) {
-        BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
-        return 1;
+    if (opt_num_rest() != 0) {
+        BIO_printf(bio_err, "Extra arguments given.\n");
+        goto opthelp;
     }
 
+    if (!done)
+        goto opthelp;
+
     return 0;
 }
 

apps/prime.c

@@ -43,6 +43,7 @@ int prime_main(int argc, char **argv)
         switch (o) {
         case OPT_EOF:
         case OPT_ERR:
+opthelp:
             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
             goto end;
         case OPT_HELP:
@@ -69,9 +70,14 @@ int prime_main(int argc, char **argv)
     argc = opt_num_rest();
     argv = opt_rest();
 
-    if (argc == 0 && !generate) {
+    if (generate) {
+        if (argc != 0) {
+            BIO_printf(bio_err, "Extra arguments given.\n");
+            goto opthelp;
+        }
+    } else if (argc == 0) {
         BIO_printf(bio_err, "%s: No prime specified\n", prog);
-        goto end;
+        goto opthelp;
     }
 
     if (generate) {

apps/rand.c

@@ -77,9 +77,13 @@ int rand_main(int argc, char **argv)
     }
     argc = opt_num_rest();
     argv = opt_rest();
-
-    if (argc != 1 || !opt_int(argv[0], &num) || num < 0)
+    if (argc == 1) {
+        if (!opt_int(argv[0], &num) || num <= 0)
+            goto end;
+    } else if (argc > 0) {
+        BIO_printf(bio_err, "Extra arguments given.\n");
         goto opthelp;
+    }
 
     out = bio_open_default(outfile, 'w', format);
     if (out == NULL)

apps/srp.c

@@ -297,11 +297,12 @@ int srp_main(int argc, char **argv)
                    "Exactly one of the options -add, -delete, -modify -list must be specified.\n");
         goto opthelp;
     }
-    if ((mode == OPT_DELETE || mode == OPT_MODIFY || mode == OPT_ADD)
-        && argc < 1) {
-        BIO_printf(bio_err,
-                   "Need at least one user for options -add, -delete, -modify. \n");
-        goto opthelp;
+    if (mode == OPT_DELETE || mode == OPT_MODIFY || mode == OPT_ADD) {
+        if (argc == 0) {
+            BIO_printf(bio_err, "Need at least one user.\n");
+            goto opthelp;
+        }
+        user = *argv++;
     }
     if ((passinarg != NULL || passoutarg != NULL) && argc != 1) {
         BIO_printf(bio_err,
@@ -390,10 +391,7 @@ int srp_main(int argc, char **argv)
     if (verbose > 1)
         BIO_printf(bio_err, "Starting user processing\n");
 
-    if (argc > 0)
-        user = *(argv++);
-
-    while (mode == OPT_LIST || user) {
+    while (mode == OPT_LIST || user != NULL) {
         int userindex = -1;
 
         if (user != NULL && verbose > 1)
@@ -554,9 +552,8 @@ int srp_main(int argc, char **argv)
                 doupdatedb = 1;
             }
         }
-        if (--argc > 0) {
-            user = *(argv++);
-        } else {
+        user = *argv++;
+        if (user == NULL) {
             /* no more processing in any mode if no users left */
             break;
         }

apps/version.c

@@ -72,6 +72,7 @@ int version_main(int argc, char **argv)
         switch (o) {
         case OPT_EOF:
         case OPT_ERR:
+opthelp:
             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
             goto end;
         case OPT_HELP:
@@ -107,6 +108,10 @@ int version_main(int argc, char **argv)
             break;
         }
     }
+    if (opt_num_rest() != 0) {
+        BIO_printf(bio_err, "Extra parameters given.\n");
+        goto opthelp;
+    }
     if (!dirty)
         version = 1;