Merge pull request hashcat#3655 from Chick3nman/show-username

Add error message when mixing --show and --username

Author: jsteube

docs/changes.txt

@@ -57,6 +57,7 @@
 - Status Code: Add specific return code for self-test fail (-11)
 - SCRYPT: Increase buffer sizes in module for hash mode 8900 to allow longer SCRYPT digests
 - Unicode: Update UTF8 to UTF16 conversion to match RFC 3629
+- User Options: Added error message when mixing --username and --show to warn users of exponential delay 
 
 * changes v6.2.5 -> v6.2.6
 

src/user_options.c

@@ -1007,6 +1007,13 @@ int user_options_sanity (hashcat_ctx_t *hashcat_ctx)
     }
   }
 
+  if ((user_options->show == true) && (user_options->username == true))
+  {
+    event_log_error (hashcat_ctx, "Mixing --show with --username can cause exponential delay in output.");
+    
+    return 0;
+  }
+
   if (user_options->show == true || user_options->left == true)
   {
     if (user_options->remove == true)