Fix const casts in CPDF_Encryptor.

Change-Id: I4d7661716116969ae80fdac52f6b400a5ff68e50
Reviewed-on: https://pdfium-review.googlesource.com/29855
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>

2 files changed, 15 insertions, 14 deletions

diff --git a/core/fpdfapi/edit/cpdf_encryptor.cpp b/core/fpdfapi/edit/cpdf_encryptor.cpp
index 45be9f8447..033df38a48 100644
--- a/core/fpdfapi/edit/cpdf_encryptor.cpp
+++ b/core/fpdfapi/edit/cpdf_encryptor.cpp
@@ -10,23 +10,20 @@
 CPDF_Encryptor::CPDF_Encryptor(CPDF_CryptoHandler* pHandler,
                                int objnum,
                                const uint8_t* src_data,
-                               uint32_t src_size)
-    : m_pData(nullptr), m_dwSize(0), m_bNewBuf(false) {
+                               uint32_t src_size) {
   if (src_size == 0)
     return;
 
   if (!pHandler) {
-    m_pData = (uint8_t*)src_data;
+    m_pData = src_data;
     m_dwSize = src_size;
     return;
   }
   m_dwSize = pHandler->EncryptGetSize(objnum, 0, src_data, src_size);
-  m_pData = FX_Alloc(uint8_t, m_dwSize);
-  pHandler->EncryptContent(objnum, 0, src_data, src_size, m_pData, m_dwSize);
-  m_bNewBuf = true;
+  m_pNewBuf.reset(FX_Alloc(uint8_t, m_dwSize));
+  pHandler->EncryptContent(objnum, 0, src_data, src_size, m_pNewBuf.get(),
+                           m_dwSize);
+  m_pData = m_pNewBuf.get();
 }
 
-CPDF_Encryptor::~CPDF_Encryptor() {
-  if (m_bNewBuf)
-    FX_Free(m_pData);
-}
+CPDF_Encryptor::~CPDF_Encryptor() {}
diff --git a/core/fpdfapi/edit/cpdf_encryptor.h b/core/fpdfapi/edit/cpdf_encryptor.h
index 1da601d491..a62a4ebf22 100644
--- a/core/fpdfapi/edit/cpdf_encryptor.h
+++ b/core/fpdfapi/edit/cpdf_encryptor.h
@@ -9,6 +9,10 @@
 
 #include <stdint.h>
 
+#include <memory>
+
+#include "core/fxcrt/fx_memory.h"
+
 class CPDF_CryptoHandler;
 
 class CPDF_Encryptor {
@@ -20,12 +24,12 @@ class CPDF_Encryptor {
   ~CPDF_Encryptor();
 
   uint32_t GetSize() const { return m_dwSize; }
-  uint8_t* GetData() const { return m_pData; }
+  const uint8_t* GetData() const { return m_pData; }
 
  private:
-  uint8_t* m_pData;
-  uint32_t m_dwSize;
-  bool m_bNewBuf;
+  const uint8_t* m_pData = nullptr;
+  std::unique_ptr<uint8_t, FxFreeDeleter> m_pNewBuf;
+  uint32_t m_dwSize = 0;
 };
 
 #endif  // CORE_FPDFAPI_EDIT_CPDF_ENCRYPTOR_H_