Split off IPDF_CryptoHandler into its own .cpp/.h files.

CPDF_CryptoHandler was always a pure-virtual class, now it
is named as IPDF_ to indicate this.

R=dsinclair@chromium.org

Review URL: https://codereview.chromium.org/1782673002 .

7 files changed, 92 insertions, 26 deletions

diff --git a/core/src/fpdfapi/fpdf_parser/cpdf_parser.cpp b/core/src/fpdfapi/fpdf_parser/cpdf_parser.cpp
index 45d29f9351..b016797d7d 100644
--- a/core/src/fpdfapi/fpdf_parser/cpdf_parser.cpp
+++ b/core/src/fpdfapi/fpdf_parser/cpdf_parser.cpp
@@ -10,6 +10,7 @@
 
 #include "core/include/fpdfapi/cpdf_document.h"
 #include "core/include/fpdfapi/fpdf_parser.h"
+#include "core/include/fpdfapi/ipdf_crypto_handler.h"
 #include "core/include/fxcrt/fx_ext.h"
 #include "core/include/fxcrt/fx_safe_types.h"
 #include "core/src/fpdfapi/fpdf_parser/cpdf_standard_security_handler.h"
@@ -94,7 +95,7 @@ void CPDF_Parser::SetEncryptDictionary(CPDF_Dictionary* pDict) {
   m_pEncryptDict = pDict;
 }
 
-CPDF_CryptoHandler* CPDF_Parser::GetCryptoHandler() {
+IPDF_CryptoHandler* CPDF_Parser::GetCryptoHandler() {
   return m_pSyntax->m_pCryptoHandler.get();
 }
 
@@ -281,7 +282,7 @@ CPDF_Parser::Error CPDF_Parser::SetEncryptHandler() {
       return err;
 
     m_pSecurityHandler = std::move(pSecurityHandler);
-    std::unique_ptr<CPDF_CryptoHandler> pCryptoHandler(
+    std::unique_ptr<IPDF_CryptoHandler> pCryptoHandler(
         m_pSecurityHandler->CreateCryptoHandler());
     if (!pCryptoHandler->Init(m_pEncryptDict, m_pSecurityHandler.get()))
       return HANDLER_ERROR;
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_encrypt.cpp b/core/src/fpdfapi/fpdf_parser/cpdf_standard_crypto_handler.cpp
index 5d710657be..d7a6fd59fe 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_encrypt.cpp
+++ b/core/src/fpdfapi/fpdf_parser/cpdf_standard_crypto_handler.cpp
@@ -4,19 +4,27 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
-#include "core/include/fpdfapi/fpdf_parser.h"
+#include "core/src/fpdfapi/fpdf_parser/cpdf_standard_crypto_handler.h"
+
+#include <time.h>
 
+#include "core/include/fpdfapi/fpdf_parser.h"
 #include "core/include/fpdfapi/cpdf_parser.h"
 #include "core/include/fpdfapi/cpdf_simple_parser.h"
 #include "core/include/fpdfapi/ipdf_security_handler.h"
 #include "core/include/fdrm/fx_crypt.h"
 
-struct PDF_CRYPTOITEM {
-  int32_t m_Cipher;
-  int32_t m_KeyLen;
-  FX_BOOL m_bChecked;
-  CPDF_StandardCryptoHandler* m_pCryptoHandler;
-};
+IPDF_CryptoHandler::~IPDF_CryptoHandler() {}
+
+void IPDF_CryptoHandler::Decrypt(FX_DWORD objnum,
+                                 FX_DWORD gennum,
+                                 CFX_ByteString& str) {
+  CFX_BinaryBuf dest_buf;
+  void* context = DecryptStart(objnum, gennum);
+  DecryptStream(context, (const uint8_t*)str, str.GetLength(), dest_buf);
+  DecryptFinish(context, dest_buf);
+  str = dest_buf;
+}
 
 void CPDF_StandardCryptoHandler::CryptBlock(FX_BOOL bEncrypt,
                                             FX_DWORD objnum,
@@ -325,15 +333,6 @@ FX_BOOL CPDF_StandardCryptoHandler::EncryptContent(FX_DWORD objnum,
   CryptBlock(TRUE, objnum, gennum, src_buf, src_size, dest_buf, dest_size);
   return TRUE;
 }
-void CPDF_CryptoHandler::Decrypt(FX_DWORD objnum,
-                                 FX_DWORD gennum,
-                                 CFX_ByteString& str) {
-  CFX_BinaryBuf dest_buf;
-  void* context = DecryptStart(objnum, gennum);
-  DecryptStream(context, (const uint8_t*)str, str.GetLength(), dest_buf);
-  DecryptFinish(context, dest_buf);
-  str = dest_buf;
-}
 CPDF_StandardCryptoHandler::CPDF_StandardCryptoHandler() {
   m_pAESContext = NULL;
   m_Cipher = FXCIPHER_NONE;
diff --git a/core/src/fpdfapi/fpdf_parser/cpdf_standard_crypto_handler.h b/core/src/fpdfapi/fpdf_parser/cpdf_standard_crypto_handler.h
new file mode 100644
index 0000000000..3ef1f7143f
--- /dev/null
+++ b/core/src/fpdfapi/fpdf_parser/cpdf_standard_crypto_handler.h
@@ -0,0 +1,64 @@
+// Copyright 2016 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_SRC_FPDFAPI_FPDF_PARSER_CPDF_STANDARD_CRYPTO_HANDLER_H_
+#define CORE_SRC_FPDFAPI_FPDF_PARSER_CPDF_STANDARD_CRYPTO_HANDLER_H_
+
+#include "core/include/fpdfapi/ipdf_crypto_handler.h"
+
+class CPDF_StandardCryptoHandler : public IPDF_CryptoHandler {
+ public:
+  CPDF_StandardCryptoHandler();
+  ~CPDF_StandardCryptoHandler() override;
+
+  // IPDF_CryptoHandler
+  FX_BOOL Init(CPDF_Dictionary* pEncryptDict,
+               IPDF_SecurityHandler* pSecurityHandler) override;
+  FX_DWORD DecryptGetSize(FX_DWORD src_size) override;
+  void* DecryptStart(FX_DWORD objnum, FX_DWORD gennum) override;
+  FX_BOOL DecryptStream(void* context,
+                        const uint8_t* src_buf,
+                        FX_DWORD src_size,
+                        CFX_BinaryBuf& dest_buf) override;
+  FX_BOOL DecryptFinish(void* context, CFX_BinaryBuf& dest_buf) override;
+  FX_DWORD EncryptGetSize(FX_DWORD objnum,
+                          FX_DWORD version,
+                          const uint8_t* src_buf,
+                          FX_DWORD src_size) override;
+  FX_BOOL EncryptContent(FX_DWORD objnum,
+                         FX_DWORD version,
+                         const uint8_t* src_buf,
+                         FX_DWORD src_size,
+                         uint8_t* dest_buf,
+                         FX_DWORD& dest_size) override;
+
+  FX_BOOL Init(int cipher, const uint8_t* key, int keylen);
+
+ protected:
+  virtual void CryptBlock(FX_BOOL bEncrypt,
+                          FX_DWORD objnum,
+                          FX_DWORD gennum,
+                          const uint8_t* src_buf,
+                          FX_DWORD src_size,
+                          uint8_t* dest_buf,
+                          FX_DWORD& dest_size);
+  virtual void* CryptStart(FX_DWORD objnum, FX_DWORD gennum, FX_BOOL bEncrypt);
+  virtual FX_BOOL CryptStream(void* context,
+                              const uint8_t* src_buf,
+                              FX_DWORD src_size,
+                              CFX_BinaryBuf& dest_buf,
+                              FX_BOOL bEncrypt);
+  virtual FX_BOOL CryptFinish(void* context,
+                              CFX_BinaryBuf& dest_buf,
+                              FX_BOOL bEncrypt);
+
+  uint8_t m_EncryptKey[32];
+  int m_KeyLen;
+  int m_Cipher;
+  uint8_t* m_pAESContext;
+};
+
+#endif  // CORE_SRC_FPDFAPI_FPDF_PARSER_CPDF_STANDARD_CRYPTO_HANDLER_H_
diff --git a/core/src/fpdfapi/fpdf_parser/cpdf_standard_security_handler.cpp b/core/src/fpdfapi/fpdf_parser/cpdf_standard_security_handler.cpp
index dab9b1f89e..60d6ba47dd 100644
--- a/core/src/fpdfapi/fpdf_parser/cpdf_standard_security_handler.cpp
+++ b/core/src/fpdfapi/fpdf_parser/cpdf_standard_security_handler.cpp
@@ -11,6 +11,7 @@
 #include "core/include/fdrm/fx_crypt.h"
 #include "core/include/fpdfapi/cpdf_parser.h"
 #include "core/include/fpdfapi/fpdf_parser.h"
+#include "core/src/fpdfapi/fpdf_parser/cpdf_standard_crypto_handler.h"
 
 namespace {
 
@@ -78,7 +79,7 @@ CPDF_StandardSecurityHandler::CPDF_StandardSecurityHandler() {
 
 CPDF_StandardSecurityHandler::~CPDF_StandardSecurityHandler() {}
 
-CPDF_CryptoHandler* CPDF_StandardSecurityHandler::CreateCryptoHandler() {
+IPDF_CryptoHandler* CPDF_StandardSecurityHandler::CreateCryptoHandler() {
   return new CPDF_StandardCryptoHandler;
 }
 
diff --git a/core/src/fpdfapi/fpdf_parser/cpdf_standard_security_handler.h b/core/src/fpdfapi/fpdf_parser/cpdf_standard_security_handler.h
index 27aeaa8bc0..fa761a1846 100644
--- a/core/src/fpdfapi/fpdf_parser/cpdf_standard_security_handler.h
+++ b/core/src/fpdfapi/fpdf_parser/cpdf_standard_security_handler.h
@@ -27,7 +27,7 @@ class CPDF_StandardSecurityHandler : public IPDF_SecurityHandler {
                        const uint8_t*& buffer,
                        int& keylen) override;
   FX_BOOL IsMetadataEncrypted() override;
-  CPDF_CryptoHandler* CreateCryptoHandler() override;
+  IPDF_CryptoHandler* CreateCryptoHandler() override;
 
   void OnCreate(CPDF_Dictionary* pEncryptDict,
                 CPDF_Array* pIdArray,
diff --git a/core/src/fpdfapi/fpdf_parser/cpdf_syntax_parser.cpp b/core/src/fpdfapi/fpdf_parser/cpdf_syntax_parser.cpp
index 151139e4a4..f635e02e3a 100644
--- a/core/src/fpdfapi/fpdf_parser/cpdf_syntax_parser.cpp
+++ b/core/src/fpdfapi/fpdf_parser/cpdf_syntax_parser.cpp
@@ -10,6 +10,7 @@
 
 #include "core/include/fpdfapi/fpdf_module.h"
 #include "core/include/fpdfapi/fpdf_parser.h"
+#include "core/include/fpdfapi/ipdf_crypto_handler.h"
 #include "core/include/fxcrt/fx_ext.h"
 #include "core/src/fpdfapi/fpdf_parser/fpdf_parser_utility.h"
 #include "third_party/base/numerics/safe_math.h"
@@ -636,7 +637,7 @@ CPDF_Stream* CPDF_SyntaxParser::ReadStream(CPDF_Dictionary* pDict,
   const CFX_ByteStringC kEndStreamStr("endstream");
   const CFX_ByteStringC kEndObjStr("endobj");
 
-  CPDF_CryptoHandler* pCryptoHandler =
+  IPDF_CryptoHandler* pCryptoHandler =
       objnum == (FX_DWORD)m_MetadataObjnum ? nullptr : m_pCryptoHandler.get();
   if (!pCryptoHandler) {
     FX_BOOL bSearchForKeyword = TRUE;
@@ -974,6 +975,6 @@ FX_FILESIZE CPDF_SyntaxParser::FindTag(const CFX_ByteStringC& tag,
 }
 
 void CPDF_SyntaxParser::SetEncrypt(
-    std::unique_ptr<CPDF_CryptoHandler> pCryptoHandler) {
+    std::unique_ptr<IPDF_CryptoHandler> pCryptoHandler) {
   m_pCryptoHandler = std::move(pCryptoHandler);
 }
diff --git a/core/src/fpdfapi/fpdf_parser/cpdf_syntax_parser.h b/core/src/fpdfapi/fpdf_parser/cpdf_syntax_parser.h
index 44c98eafd8..c259efb1ee 100644
--- a/core/src/fpdfapi/fpdf_parser/cpdf_syntax_parser.h
+++ b/core/src/fpdfapi/fpdf_parser/cpdf_syntax_parser.h
@@ -11,12 +11,12 @@
 
 #include "core/include/fxcrt/fx_basic.h"
 
-class CPDF_CryptoHandler;
+class CPDF_Dictionary;
 class CPDF_IndirectObjectHolder;
 class CPDF_Object;
-class CPDF_Dictionary;
 class CPDF_Stream;
 class IFX_FileRead;
+class IPDF_CryptoHandler;
 
 class CPDF_SyntaxParser {
  public:
@@ -49,7 +49,7 @@ class CPDF_SyntaxParser {
                       FX_FILESIZE limit);
   FX_FILESIZE FindTag(const CFX_ByteStringC& tag, FX_FILESIZE limit);
 
-  void SetEncrypt(std::unique_ptr<CPDF_CryptoHandler> pCryptoHandler);
+  void SetEncrypt(std::unique_ptr<IPDF_CryptoHandler> pCryptoHandler);
 
   FX_BOOL ReadBlock(uint8_t* pBuf, FX_DWORD size);
   FX_BOOL GetCharAt(FX_FILESIZE pos, uint8_t& ch);
@@ -88,7 +88,7 @@ class CPDF_SyntaxParser {
   uint8_t* m_pFileBuf;
   FX_DWORD m_BufSize;
   FX_FILESIZE m_BufOffset;
-  std::unique_ptr<CPDF_CryptoHandler> m_pCryptoHandler;
+  std::unique_ptr<IPDF_CryptoHandler> m_pCryptoHandler;
   uint8_t m_WordBuffer[257];
   FX_DWORD m_WordSize;
 };