From dddd7a5a828cbf9cc30d9afa5de06e104a03d44e Mon Sep 17 00:00:00 2001
From: Nicolas Duchon <nicolas.duchon@gmail.com>
Date: Tue, 3 Aug 2021 23:16:36 +0200
Subject: [PATCH] fix: prevent endless loop of wildcard enumeration

---
 app/functions.sh | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/app/functions.sh b/app/functions.sh
index cc51898..f8d5497 100644
--- a/app/functions.sh
+++ b/app/functions.sh
@@ -43,7 +43,11 @@ function ascending_wildcard_locations {
     until [[ "$domain" =~ $regex ]]; do
       first_label="${domain%%.*}"
       domain="${domain/${first_label}./}"
-      echo "*.${domain}"
+      if [[ -z "$domain" ]]; then
+        return
+      else
+        echo "*.${domain}"
+      fi
     done
 }
 
@@ -59,7 +63,11 @@ function descending_wildcard_locations {
     until [[ "$domain" =~ $regex ]]; do
       last_label="${domain##*.}"
       domain="${domain/.${last_label}/}"
-      echo "${domain}.*"
+      if [[ -z "$domain" ]]; then
+        return
+      else
+        echo "${domain}.*"
+      fi
     done
 }