From 561b16e9fbf823cd8bf89ef13a5d2109cd2e8a1e Mon Sep 17 00:00:00 2001
From: Pete Matsyburka <pete.matsy@gmail.com>
Date: Wed, 7 Aug 2024 17:04:54 +0300
Subject: [PATCH] fix pdf

---
 config/initializers/hexapdf.rb | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/config/initializers/hexapdf.rb b/config/initializers/hexapdf.rb
index aa37376f..bda20737 100644
--- a/config/initializers/hexapdf.rb
+++ b/config/initializers/hexapdf.rb
@@ -11,6 +11,20 @@ module HexaPDF
         string_algorithm.encrypt(key, str).dup
       end
     end
+
+    module AES
+      module ClassMethods
+        def unpad(data)
+          padding_length = data.getbyte(-1)
+          if !padding_length || padding_length > BLOCK_SIZE || padding_length.zero? ||
+             data[-padding_length, padding_length].each_byte.any? { |byte| byte != padding_length }
+            data
+          else
+            data[0...-padding_length]
+          end
+        end
+      end
+    end
   end
 
   module Type