1 files changed, 82 insertions, 4 deletions

diff --git a/core/include/fpdfapi/fpdf_parser.h b/core/include/fpdfapi/fpdf_parser.h
index 1b09aa0148..53f9c5a316 100644
--- a/core/include/fpdfapi/fpdf_parser.h
+++ b/core/include/fpdfapi/fpdf_parser.h
@@ -28,7 +28,6 @@ class CPDF_Object;
 class CPDF_Parser;
 class CPDF_Pattern;
 class CPDF_StandardSecurityHandler;
-class CPDF_SyntaxParser;
 class IPDF_SecurityHandler;
 
 #define FPDFPERM_PRINT 0x0004
@@ -232,6 +231,81 @@ class CPDF_SimpleParser {
   FX_DWORD m_dwCurPos;
 };
 
+class CPDF_SyntaxParser {
+ public:
+  CPDF_SyntaxParser();
+  ~CPDF_SyntaxParser();
+
+  void InitParser(IFX_FileRead* pFileAccess, FX_DWORD HeaderOffset);
+
+  FX_FILESIZE SavePos() const { return m_Pos; }
+  void RestorePos(FX_FILESIZE pos) { m_Pos = pos; }
+
+  CPDF_Object* GetObject(CPDF_IndirectObjectHolder* pObjList,
+                         FX_DWORD objnum,
+                         FX_DWORD gennum,
+                         FX_BOOL bDecrypt);
+  CPDF_Object* GetObjectByStrict(CPDF_IndirectObjectHolder* pObjList,
+                                 FX_DWORD objnum,
+                                 FX_DWORD gennum);
+  CFX_ByteString GetKeyword();
+
+  void ToNextLine();
+  void ToNextWord();
+
+  FX_BOOL SearchWord(const CFX_ByteStringC& word,
+                     FX_BOOL bWholeWord,
+                     FX_BOOL bForward,
+                     FX_FILESIZE limit);
+  int SearchMultiWord(const CFX_ByteStringC& words,
+                      FX_BOOL bWholeWord,
+                      FX_FILESIZE limit);
+  FX_FILESIZE FindTag(const CFX_ByteStringC& tag, FX_FILESIZE limit);
+
+  void SetEncrypt(std::unique_ptr<CPDF_CryptoHandler> pCryptoHandler);
+
+  FX_BOOL ReadBlock(uint8_t* pBuf, FX_DWORD size);
+  FX_BOOL GetCharAt(FX_FILESIZE pos, uint8_t& ch);
+  CFX_ByteString GetNextWord(bool* bIsNumber);
+
+ private:
+  friend class CPDF_Parser;
+  friend class CPDF_DataAvail;
+  friend class fpdf_parser_parser_ReadHexString_Test;
+
+  static const int kParserMaxRecursionDepth = 64;
+  static int s_CurrentRecursionDepth;
+
+  uint32_t GetDirectNum();
+
+  FX_BOOL GetNextChar(uint8_t& ch);
+  FX_BOOL GetCharAtBackward(FX_FILESIZE pos, uint8_t& ch);
+  void GetNextWordInternal(bool* bIsNumber);
+  bool IsWholeWord(FX_FILESIZE startpos,
+                   FX_FILESIZE limit,
+                   const CFX_ByteStringC& tag,
+                   FX_BOOL checkKeyword);
+
+  CFX_ByteString ReadString();
+  CFX_ByteString ReadHexString();
+  unsigned int ReadEOLMarkers(FX_FILESIZE pos);
+  CPDF_Stream* ReadStream(CPDF_Dictionary* pDict,
+                          FX_DWORD objnum,
+                          FX_DWORD gennum);
+
+  FX_FILESIZE m_Pos;
+  int m_MetadataObjnum;
+  IFX_FileRead* m_pFileAccess;
+  FX_DWORD m_HeaderOffset;
+  FX_FILESIZE m_FileLen;
+  uint8_t* m_pFileBuf;
+  FX_DWORD m_BufSize;
+  FX_FILESIZE m_BufOffset;
+  std::unique_ptr<CPDF_CryptoHandler> m_pCryptoHandler;
+  uint8_t m_WordBuffer[257];
+  FX_DWORD m_WordSize;
+};
+
 class CPDF_Parser {
  public:
   enum Error {
@@ -250,6 +324,11 @@ class CPDF_Parser {
 
   void SetPassword(const FX_CHAR* password) { m_Password = password; }
   CFX_ByteString GetPassword() { return m_Password; }
+
+  CPDF_CryptoHandler* GetCryptoHandler() {
+    return m_Syntax.m_pCryptoHandler.get();
+  }
+
   CPDF_Dictionary* GetTrailer() const { return m_pTrailer; }
   FX_FILESIZE GetLastXRefOffset() const { return m_LastXRefOffset; }
   CPDF_Document* GetDocument() const { return m_pDocument; }
@@ -271,13 +350,12 @@ class CPDF_Parser {
   bool IsVersionUpdated() const { return m_bVersionUpdated; }
   bool IsObjectFreeOrNull(FX_DWORD objnum) const;
   FX_BOOL IsFormStream(FX_DWORD objnum, FX_BOOL& bForm);
-  CPDF_CryptoHandler* GetCryptoHandler();
-  IFX_FileRead* GetFileAccess() const;
 
   FX_FILESIZE GetObjectOffset(FX_DWORD objnum) const;
   FX_FILESIZE GetObjectSize(FX_DWORD objnum) const;
 
   void GetIndirectBinary(FX_DWORD objnum, uint8_t*& pBuffer, FX_DWORD& size);
+  IFX_FileRead* GetFileAccess() const { return m_Syntax.m_pFileAccess; }
   int GetFileVersion() const { return m_FileVersion; }
   FX_BOOL IsXRefStream() const { return m_bXRefStream; }
 
@@ -324,7 +402,7 @@ class CPDF_Parser {
   void ShrinkObjectMap(FX_DWORD size);
 
   CPDF_Document* m_pDocument;
-  std::unique_ptr<CPDF_SyntaxParser> m_pSyntax;
+  CPDF_SyntaxParser m_Syntax;
   bool m_bOwnFileRead;
   int m_FileVersion;
   CPDF_Dictionary* m_pTrailer;