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diff --git a/core/fpdfapi/edit/cpdf_encryptor.h b/core/fpdfapi/edit/cpdf_encryptor.h
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index 0000000000..00c9337eb3
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+++ b/core/fpdfapi/edit/cpdf_encryptor.h
@@ -0,0 +1,31 @@
+// Copyright 2017 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef CORE_FPDFAPI_EDIT_CPDF_ENCRYPTOR_H_
+#define CORE_FPDFAPI_EDIT_CPDF_ENCRYPTOR_H_
+
+#include <stdint.h>
+
+class CPDF_CryptoHandler;
+
+class CPDF_Encryptor {
+ public:
+  CPDF_Encryptor(CPDF_CryptoHandler* pHandler,
+                 int objnum,
+                 uint8_t* src_data,
+                 uint32_t src_size);
+  ~CPDF_Encryptor();
+
+  uint32_t GetSize() const { return m_dwSize; }
+  uint8_t* GetData() const { return m_pData; }
+
+ private:
+  uint8_t* m_pData;
+  uint32_t m_dwSize;
+  bool m_bNewBuf;
+};
+
+#endif  // CORE_FPDFAPI_EDIT_CPDF_ENCRYPTOR_H_