From d61539cdd435eb812053104ab5a12700607732be Mon Sep 17 00:00:00 2001
From: =?utf8?q?Paul=20H=C3=A4nsch?= <paul@plutz.net>
Date: Mon, 19 Jun 2023 15:24:26 +0200
Subject: [PATCH] bugfix: prevent endless loop in HEX_DECODE, copy
 non-hex-digits unchanged

---
 cgilite.sh | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/cgilite.sh b/cgilite.sh
index b51ee8e..b915a8f 100755
--- a/cgilite.sh
+++ b/cgilite.sh
@@ -85,6 +85,12 @@ HEX_DECODE(){
   # will be copied to the output literally
 
   while [ "$in" ]; do
+    [ "$pfx" ] || case $in in
+      [0-9a-fA-F][0-9a-fA-F]*):;;
+      ?*) out="${out}${in%%"${in#?}"}"
+          in="${in#?}"; continue;;
+    esac
+
     case $in in
       "$pfx"[0-9a-fA-F][0-9a-fA-F]*) in="${in#${pfx}}";;
       \\*) in="${in#?}"; out="${out}\\\\"; continue;;
-- 
2.39.2