From 7940dee6de6311fa893ec9b9bed6726bd2c44097 Mon Sep 17 00:00:00 2001
From: alainc-be <alainc@telenet.be>
Date: Tue, 15 Sep 2026 22:45:54 +0200
Subject: [PATCH] Correct Font Encryption (issue 185)

---
 src/Cpdf.php | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/Cpdf.php b/src/Cpdf.php
index daf710d..53c06d2 100644
--- a/src/Cpdf.php
+++ b/src/Cpdf.php
@@ -1130,8 +1130,11 @@ private function o_fontGIDtoCIDMap($id, $action, $options = '')
                         $tmp = gzcompress($tmp, $this->options['compression']);
                         $res .= ' /Filter /FlateDecode';
                     }
-
-                        $res .= ' /Length '.mb_strlen($tmp, '8bit')." >>\nstream\n$tmp\nendstream";
+                    if ($this->encryptionMode > 0) { 
+                        $this->encryptInit($id); 
+                        $tmp = $this->ARC4($tmp); 
+                    }
+                    $res .= ' /Length '.mb_strlen($tmp, '8bit')." >>\nstream\n$tmp\nendstream";
                 }
 
                   $res .= "\nendobj";