diff options
Diffstat (limited to 'chromium/third_party/pdfium/xfa/fxfa/app/xfa_checksum.cpp')
| -rw-r--r-- | chromium/third_party/pdfium/xfa/fxfa/app/xfa_checksum.cpp | 271 |
1 files changed, 0 insertions, 271 deletions
diff --git a/chromium/third_party/pdfium/xfa/fxfa/app/xfa_checksum.cpp b/chromium/third_party/pdfium/xfa/fxfa/app/xfa_checksum.cpp deleted file mode 100644 index 09c42719c11..00000000000 --- a/chromium/third_party/pdfium/xfa/fxfa/app/xfa_checksum.cpp +++ /dev/null @@ -1,271 +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 FX_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, - FX_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, FX_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; - FX_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); - FX_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()); -} |