decrypt.rb in combine_pdf-1.0.27

- old
+ new

@@ -1,6 +1,7 @@
 # -*- encoding : utf-8 -*-
+# frozen_string_literal: true
 ########################################################
 ## Thoughts from reading the ISO 32000-1:2008
 ## this file is part of the CombinePDF library and the code
 ## is subject to the same license.
 ########################################################
@@ -135,10 +136,10 @@
     def decrypt_AES(encrypted, encrypted_id, encrypted_generation, _encrypted_filter)
       ## start decryption using padding strings
       object_key = @key.dup
       object_key << [encrypted_id].pack('i')[0..2]
       object_key << [encrypted_generation].pack('i')[0..1]
-      object_key << 'sAlT'.force_encoding(Encoding::ASCII_8BIT)
+      object_key << 'sAlT'.b
       key_length = object_key.length < 16 ? object_key.length : 16
 
       begin
         cipher = OpenSSL::Cipher.new("aes-#{key_length << 3}-cbc")
         cipher.decrypt