[xfa] Remove form checksum abilities

This CL removes the code for verifying and creating checksums associated
with form elements in XFA documents. This was the only code requiring
the SAXReader which has also been removed.

According to the XFA spec and application can decide which parts of the
signatures are supported. This feature is being removed until we
determine if/when it is needed.

Bug: pdfium:1063
Change-Id: Iec2261282340f8fc72a1225d2e0d3e6ddf05edcb
Reviewed-on: https://pdfium-review.googlesource.com/30150
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>

1 files changed, 0 insertions, 174 deletions

diff --git a/core/fxcrt/xml/cfx_saxreader.h b/core/fxcrt/xml/cfx_saxreader.h
deleted file mode 100644
index 9ff755d053..0000000000
--- a/core/fxcrt/xml/cfx_saxreader.h
+++ /dev/null
@@ -1,174 +0,0 @@
-// Copyright 2014 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_FXCRT_XML_CFX_SAXREADER_H_
-#define CORE_FXCRT_XML_CFX_SAXREADER_H_
-
-#include <memory>
-#include <stack>
-#include <vector>
-
-#include "core/fxcrt/fx_string.h"
-#include "core/fxcrt/retain_ptr.h"
-
-class CFX_SAXCommentContext;
-class CFX_SAXContext;
-class IFX_SeekableReadStream;
-enum class CFX_SaxMode;
-
-class CFX_SAXItem {
- public:
-  enum class Type {
-    Unknown = 0,
-    Instruction,
-    Declaration,
-    Comment,
-    Tag,
-    Text,
-    CharData,
-  };
-
-  explicit CFX_SAXItem(uint32_t id)
-      : m_pNode(nullptr), m_eNode(Type::Unknown), m_dwID(id), m_bSkip(false) {}
-
-  CFX_SAXContext* m_pNode;
-  Type m_eNode;
-  const uint32_t m_dwID;
-  bool m_bSkip;
-};
-
-class CFX_SAXFile {
- public:
-  CFX_SAXFile();
-  ~CFX_SAXFile();
-
-  bool StartFile(const RetainPtr<IFX_SeekableReadStream>& pFile,
-                 uint32_t dwStart,
-                 uint32_t dwLen);
-  bool ReadNextBlock();
-  void Reset();
-
-  RetainPtr<IFX_SeekableReadStream> m_pFile;
-  uint32_t m_dwStart;
-  uint32_t m_dwEnd;
-  uint32_t m_dwCur;
-  uint8_t* m_pBuf;
-  uint32_t m_dwBufSize;
-  uint32_t m_dwBufIndex;
-};
-
-enum CFX_SaxParseMode {
-  CFX_SaxParseMode_NotConvert_amp = 1 << 0,
-  CFX_SaxParseMode_NotConvert_lt = 1 << 1,
-  CFX_SaxParseMode_NotConvert_gt = 1 << 2,
-  CFX_SaxParseMode_NotConvert_apos = 1 << 3,
-  CFX_SaxParseMode_NotConvert_quot = 1 << 4,
-  CFX_SaxParseMode_NotConvert_sharp = 1 << 5,
-  CFX_SaxParseMode_NotSkipSpace = 1 << 6
-};
-
-class CFX_SAXReader {
- public:
-  class HandlerIface {
-   public:
-    virtual ~HandlerIface() {}
-    virtual CFX_SAXContext* OnTagEnter(const ByteStringView& bsTagName,
-                                       CFX_SAXItem::Type eType,
-                                       uint32_t dwStartPos) = 0;
-    virtual void OnTagAttribute(CFX_SAXContext* pTag,
-                                const ByteStringView& bsAttri,
-                                const ByteStringView& bsValue) = 0;
-    virtual void OnTagBreak(CFX_SAXContext* pTag) = 0;
-    virtual void OnTagData(CFX_SAXContext* pTag,
-                           CFX_SAXItem::Type eType,
-                           const ByteStringView& bsData,
-                           uint32_t dwStartPos) = 0;
-    virtual void OnTagClose(CFX_SAXContext* pTag, uint32_t dwEndPos) = 0;
-    virtual void OnTagEnd(CFX_SAXContext* pTag,
-                          const ByteStringView& bsTagName,
-                          uint32_t dwEndPos) = 0;
-    virtual void OnTargetData(CFX_SAXContext* pTag,
-                              CFX_SAXItem::Type eType,
-                              const ByteStringView& bsData,
-                              uint32_t dwStartPos) = 0;
-  };
-
-  CFX_SAXReader();
-  ~CFX_SAXReader();
-
-  int32_t StartParse(const RetainPtr<IFX_SeekableReadStream>& pFile,
-                     uint32_t dwStart = 0,
-                     uint32_t dwLen = -1,
-                     uint32_t dwParseMode = 0);
-  int32_t ContinueParse();
-  void SetHandler(HandlerIface* pHandler) { m_pHandler = pHandler; }
-
- private:
-  void ParseInternal();
-  void SkipCurrentNode();
-  void AppendData(uint8_t ch);
-  void AppendName(uint8_t ch);
-  void ParseText();
-  void ParseNodeStart();
-  void ParseInstruction();
-  void ParseDeclOrComment();
-  void ParseDeclNode();
-  void ParseComment();
-  void ParseCommentContent();
-  void ParseTagName();
-  void ParseTagAttributeName();
-  void ParseTagAttributeEqual();
-  void ParseTagAttributeValue();
-  void ParseMaybeClose();
-  void ParseTagClose();
-  void ParseTagEnd();
-  void ParseTargetData();
-  void Reset();
-  void ClearData();
-  void ClearName();
-  void AppendToData(uint8_t ch);
-  void AppendToName(uint8_t ch);
-  void BackUpAndReplaceDataAt(int32_t index, uint8_t ch);
-  bool IsEntityStart(uint8_t ch) const;
-  bool IsEntityEnd(uint8_t ch) const;
-  int32_t CurrentDataIndex() const;
-  void Push();
-  void Pop();
-  CFX_SAXItem* GetCurrentItem() const;
-  bool SkipSpace(uint8_t ch);
-  void SkipNode();
-  void NotifyData();
-  void NotifyEnter();
-  void NotifyAttribute();
-  void NotifyBreak();
-  void NotifyClose();
-  void NotifyEnd();
-  void NotifyTargetData();
-  void ReallocDataBuffer();
-  void ReallocNameBuffer();
-  void ParseChar(uint8_t ch);
-
-  CFX_SAXFile m_File;
-  HandlerIface* m_pHandler;
-  int32_t m_iState;
-  std::stack<std::unique_ptr<CFX_SAXItem>> m_Stack;
-  uint32_t m_dwItemID;
-  CFX_SaxMode m_eMode;
-  CFX_SaxMode m_ePrevMode;
-  bool m_bCharData;
-  uint8_t m_CurByte;
-  uint32_t m_dwDataOffset;
-  std::stack<char> m_SkipStack;
-  uint8_t m_SkipChar;
-  uint32_t m_dwNodePos;
-  std::vector<uint8_t> m_Data;
-  int32_t m_iEntityStart;  // Index into m_Data.
-  std::vector<uint8_t> m_Name;
-  uint32_t m_dwParseMode;
-  std::unique_ptr<CFX_SAXCommentContext> m_pCommentContext;
-};
-
-#endif  // CORE_FXCRT_XML_CFX_SAXREADER_H_