* src/lsh-writekey.c (main): Check that the given key isn't empty.

Rev: src/lsh-writekey.c:1.33

src/lsh-writekey.c

@@ -406,7 +406,7 @@ main(int argc, char **argv)
   struct lsh_string *input;
   struct lsh_string *output;
   const struct exception *e;
-  
+
   argp_parse(&main_argp, argc, argv, 0, NULL, options);
 
   if (! (check_file(options->private_file)
@@ -421,6 +421,12 @@ main(int argc, char **argv)
       return EXIT_FAILURE;
     }
   
+  if (!input->length)
+    {
+      werror("Empty key on input, giving up.\n");
+      return EXIT_FAILURE;
+    }
+  
   output = process_private(input, options);
   if (!output)
     return EXIT_FAILURE;