process password protected pdf files

lib/pdf_utils.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+module PdfUtils
+  module_function
+
+  def encrypted?(data, password: nil)
+    HexaPDF::Document.new(io: StringIO.new(data), decryption_opts: { password: })
+
+    false
+  rescue HexaPDF::EncryptionError
+    true
+  end
+
+  def decrypt(data, password)
+    encrypted_doc = HexaPDF::Document.new(io: StringIO.new(data), decryption_opts: { password: })
+
+    decrypted_doc = HexaPDF::Document.new
+
+    encrypted_doc.pages.each do |page|
+      decrypted_doc.pages << decrypted_doc.import(page)
+    end
+
+    decrypted_io = StringIO.new
+
+    decrypted_doc.write(decrypted_io, validate: false)
+
+    decrypted_io.tap(&:rewind).read
+  end
+end