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Diffstat (limited to 'xfa/fxfa/app/xfa_checksum.cpp')
-rw-r--r--xfa/fxfa/app/xfa_checksum.cpp269
1 files changed, 0 insertions, 269 deletions
diff --git a/xfa/fxfa/app/xfa_checksum.cpp b/xfa/fxfa/app/xfa_checksum.cpp
deleted file mode 100644
index a06fed870c..0000000000
--- a/xfa/fxfa/app/xfa_checksum.cpp
+++ /dev/null
@@ -1,269 +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
-
-#include "xfa/fxfa/xfa_checksum.h"
-
-#include "core/fdrm/crypto/fx_crypt.h"
-#include "third_party/base/ptr_util.h"
-
-namespace {
-
-struct FX_BASE64DATA {
- uint32_t data1 : 2;
- uint32_t data2 : 6;
- uint32_t data3 : 4;
- uint32_t data4 : 4;
- uint32_t data5 : 6;
- uint32_t data6 : 2;
- uint32_t data7 : 8;
-};
-
-const char g_FXBase64EncoderMap[64] = {
- 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
- 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
- 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
- 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
- '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/',
-};
-
-void Base64EncodePiece(const FX_BASE64DATA& src, int32_t iBytes, char dst[4]) {
- dst[0] = g_FXBase64EncoderMap[src.data2];
- uint32_t b = src.data1 << 4;
- if (iBytes > 1) {
- b |= src.data4;
- }
- dst[1] = g_FXBase64EncoderMap[b];
- if (iBytes > 1) {
- b = src.data3 << 2;
- if (iBytes > 2) {
- b |= src.data6;
- }
- dst[2] = g_FXBase64EncoderMap[b];
- if (iBytes > 2) {
- dst[3] = g_FXBase64EncoderMap[src.data5];
- } else {
- dst[3] = '=';
- }
- } else {
- dst[2] = dst[3] = '=';
- }
-}
-
-int32_t Base64EncodeA(const uint8_t* pSrc, int32_t iSrcLen, char* pDst) {
- ASSERT(pSrc);
- if (iSrcLen < 1) {
- return 0;
- }
- if (!pDst) {
- int32_t iDstLen = iSrcLen / 3 * 4;
- if ((iSrcLen % 3) != 0) {
- iDstLen += 4;
- }
- return iDstLen;
- }
- FX_BASE64DATA srcData;
- int32_t iBytes = 3;
- char* pDstEnd = pDst;
- while (iSrcLen > 0) {
- if (iSrcLen > 2) {
- ((uint8_t*)&srcData)[0] = *pSrc++;
- ((uint8_t*)&srcData)[1] = *pSrc++;
- ((uint8_t*)&srcData)[2] = *pSrc++;
- iSrcLen -= 3;
- } else {
- *((uint32_t*)&srcData) = 0;
- ((uint8_t*)&srcData)[0] = *pSrc++;
- if (iSrcLen > 1) {
- ((uint8_t*)&srcData)[1] = *pSrc++;
- }
- iBytes = iSrcLen;
- iSrcLen = 0;
- }
- Base64EncodePiece(srcData, iBytes, pDstEnd);
- pDstEnd += 4;
- }
- return pDstEnd - pDst;
-}
-
-} // namespace
-
-CXFA_SAXReaderHandler::CXFA_SAXReaderHandler(CXFA_ChecksumContext* pContext)
- : m_pContext(pContext) {
- ASSERT(m_pContext);
-}
-CXFA_SAXReaderHandler::~CXFA_SAXReaderHandler() {}
-CXFA_SAXContext* CXFA_SAXReaderHandler::OnTagEnter(
- const CFX_ByteStringC& bsTagName,
- CFX_SAXItem::Type eType,
- uint32_t dwStartPos) {
- UpdateChecksum(true);
- if (eType != CFX_SAXItem::Type::Tag &&
- eType != CFX_SAXItem::Type::Instruction) {
- return nullptr;
- }
- m_SAXContext.m_eNode = eType;
- CFX_ByteTextBuf& textBuf = m_SAXContext.m_TextBuf;
- textBuf << "<";
- if (eType == CFX_SAXItem::Type::Instruction) {
- textBuf << "?";
- }
- textBuf << bsTagName;
- m_SAXContext.m_bsTagName = bsTagName;
- return &m_SAXContext;
-}
-
-void CXFA_SAXReaderHandler::OnTagAttribute(CXFA_SAXContext* pTag,
- const CFX_ByteStringC& bsAttri,
- const CFX_ByteStringC& bsValue) {
- if (!pTag)
- return;
-
- pTag->m_TextBuf << " " << bsAttri << "=\"" << bsValue << "\"";
-}
-
-void CXFA_SAXReaderHandler::OnTagBreak(CXFA_SAXContext* pTag) {
- if (!pTag)
- return;
-
- pTag->m_TextBuf << ">";
- UpdateChecksum(false);
-}
-
-void CXFA_SAXReaderHandler::OnTagData(CXFA_SAXContext* pTag,
- CFX_SAXItem::Type eType,
- const CFX_ByteStringC& bsData,
- uint32_t dwStartPos) {
- if (!pTag)
- return;
-
- CFX_ByteTextBuf& textBuf = pTag->m_TextBuf;
- if (eType == CFX_SAXItem::Type::CharData)
- textBuf << "<![CDATA[";
-
- textBuf << bsData;
- if (eType == CFX_SAXItem::Type::CharData)
- textBuf << "]]>";
-}
-
-void CXFA_SAXReaderHandler::OnTagClose(CXFA_SAXContext* pTag,
- uint32_t dwEndPos) {
- if (!pTag)
- return;
-
- CFX_ByteTextBuf& textBuf = pTag->m_TextBuf;
- if (pTag->m_eNode == CFX_SAXItem::Type::Instruction)
- textBuf << "?>";
- else if (pTag->m_eNode == CFX_SAXItem::Type::Tag)
- textBuf << "></" << pTag->m_bsTagName.AsStringC() << ">";
-
- UpdateChecksum(false);
-}
-
-void CXFA_SAXReaderHandler::OnTagEnd(CXFA_SAXContext* pTag,
- const CFX_ByteStringC& bsTagName,
- uint32_t dwEndPos) {
- if (!pTag)
- return;
-
- pTag->m_TextBuf << "</" << bsTagName << ">";
- UpdateChecksum(false);
-}
-
-void CXFA_SAXReaderHandler::OnTargetData(CXFA_SAXContext* pTag,
- CFX_SAXItem::Type eType,
- const CFX_ByteStringC& bsData,
- uint32_t dwStartPos) {
- if (!pTag && eType != CFX_SAXItem::Type::Comment)
- return;
-
- if (eType == CFX_SAXItem::Type::Comment) {
- m_SAXContext.m_TextBuf << "<!--" << bsData << "-->";
- UpdateChecksum(false);
- } else {
- pTag->m_TextBuf << " " << bsData;
- }
-}
-
-void CXFA_SAXReaderHandler::UpdateChecksum(bool bCheckSpace) {
- int32_t iLength = m_SAXContext.m_TextBuf.GetLength();
- if (iLength < 1) {
- return;
- }
- uint8_t* pBuffer = m_SAXContext.m_TextBuf.GetBuffer();
- bool bUpdata = true;
- if (bCheckSpace) {
- bUpdata = false;
- for (int32_t i = 0; i < iLength; i++) {
- bUpdata = (pBuffer[i] > 0x20);
- if (bUpdata) {
- break;
- }
- }
- }
- if (bUpdata) {
- m_pContext->Update(CFX_ByteStringC(pBuffer, iLength));
- }
- m_SAXContext.m_TextBuf.Clear();
-}
-
-CXFA_ChecksumContext::CXFA_ChecksumContext() {}
-
-CXFA_ChecksumContext::~CXFA_ChecksumContext() {}
-
-void CXFA_ChecksumContext::StartChecksum() {
- FinishChecksum();
- m_pByteContext = pdfium::MakeUnique<CRYPT_sha1_context>();
- CRYPT_SHA1Start(m_pByteContext.get());
- m_bsChecksum.clear();
- m_pSAXReader = pdfium::MakeUnique<CFX_SAXReader>();
-}
-
-bool CXFA_ChecksumContext::UpdateChecksum(
- const CFX_RetainPtr<IFX_SeekableReadStream>& pSrcFile,
- FX_FILESIZE offset,
- size_t size) {
- if (!m_pSAXReader || !pSrcFile)
- return false;
-
- if (size < 1)
- size = pSrcFile->GetSize();
-
- CXFA_SAXReaderHandler handler(this);
- m_pSAXReader->SetHandler(&handler);
- if (m_pSAXReader->StartParse(
- pSrcFile, (uint32_t)offset, (uint32_t)size,
- CFX_SaxParseMode_NotSkipSpace | CFX_SaxParseMode_NotConvert_amp |
- CFX_SaxParseMode_NotConvert_lt | CFX_SaxParseMode_NotConvert_gt |
- CFX_SaxParseMode_NotConvert_sharp) < 0) {
- return false;
- }
- return m_pSAXReader->ContinueParse(nullptr) > 99;
-}
-
-void CXFA_ChecksumContext::FinishChecksum() {
- m_pSAXReader.reset();
- if (m_pByteContext) {
- uint8_t digest[20];
- FXSYS_memset(digest, 0, 20);
- CRYPT_SHA1Finish(m_pByteContext.get(), digest);
- int32_t nLen = Base64EncodeA(digest, 20, nullptr);
- char* pBuffer = m_bsChecksum.GetBuffer(nLen);
- Base64EncodeA(digest, 20, pBuffer);
- m_bsChecksum.ReleaseBuffer(nLen);
- m_pByteContext.reset();
- }
-}
-
-CFX_ByteString CXFA_ChecksumContext::GetChecksum() const {
- return m_bsChecksum;
-}
-
-void CXFA_ChecksumContext::Update(const CFX_ByteStringC& bsText) {
- if (!m_pByteContext)
- return;
-
- CRYPT_SHA1Update(m_pByteContext.get(), bsText.raw_str(), bsText.GetLength());
-}
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