1 files changed, 10 insertions, 2 deletions

diff --git a/src/usr.bin/openssl/apps.c b/src/usr.bin/openssl/apps.c
index f69613e586..e34aeaecba 100644
--- a/src/usr.bin/openssl/apps.c
+++ b/src/usr.bin/openssl/apps.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: apps.c,v 1.5 2014/08/28 13:39:07 jsing Exp $ */
+/* $OpenBSD: apps.c,v 1.6 2014/08/28 13:51:38 jsing Exp $ */
 /*
  * Copyright (c) 2014 Joel Sing <jsing@openbsd.org>
  *
@@ -2259,6 +2259,7 @@ options_parse(int argc, char **argv, struct option *opts, char **unnamed)
         char *arg, *p;
         int ord = 0;
         int i, j;
+        int fmt;
 
         for (i = 1; i < argc; i++) {
                 p = arg = argv[i];
@@ -2294,7 +2295,14 @@ options_parse(int argc, char **argv, struct option *opts, char **unnamed)
                                 break;
 
                         case OPTION_ARG_FORMAT:
-                                *opt->opt.value = str2fmt(argv[i]);
+                                fmt = str2fmt(argv[i]);
+                                if (fmt == FORMAT_UNDEF) {
+                                        fprintf(stderr,
+                                            "unknown %s '%s' for -%s\n",
+                                            opt->argname, argv[i], opt->name);
+                                        return (1);
+                                }
+                                *opt->opt.value = fmt;
                                 break;
 
                         case OPTION_ARG_INT: