// 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 "../../../include/fxcrt/fx_ext.h" #include "../../../include/fpdfapi/fpdf_serial.h" #include "editint.h" #define PDF_OBJECTSTREAM_MAXLENGTH (256 * 1024) #define PDF_XREFSTREAM_MAXSIZE 10000 extern void FlateEncode(const uint8_t* src_buf, FX_DWORD src_data, uint8_t*& dest_buf, FX_DWORD& dest_size); extern void FlateEncode(const uint8_t* src_buf, FX_DWORD src_size, int predictor, int Colors, int BitsPerComponent, int Columns, uint8_t*& dest_buf, FX_DWORD& dest_size); extern FX_BOOL IsSignatureDict(const CPDF_Dictionary* pDict); int32_t PDF_CreatorAppendObject(const CPDF_Object* pObj, CFX_FileBufferArchive* pFile, FX_FILESIZE& offset) { int32_t len = 0; if (pObj == NULL) { if (pFile->AppendString(FX_BSTRC(" null")) < 0) { return -1; } offset += 5; return 1; } switch (pObj->GetType()) { case PDFOBJ_NULL: if (pFile->AppendString(FX_BSTRC(" null")) < 0) { return -1; } offset += 5; break; case PDFOBJ_BOOLEAN: case PDFOBJ_NUMBER: if (pFile->AppendString(FX_BSTRC(" ")) < 0) { return -1; } if ((len = pFile->AppendString(pObj->GetString())) < 0) { return -1; } offset += len + 1; break; case PDFOBJ_STRING: { CFX_ByteString str = pObj->GetString(); FX_BOOL bHex = ((CPDF_String*)pObj)->IsHex(); if ((len = pFile->AppendString(PDF_EncodeString(str, bHex))) < 0) { return -1; } offset += len; break; } case PDFOBJ_NAME: { if (pFile->AppendString(FX_BSTRC("/")) < 0) { return -1; } CFX_ByteString str = pObj->GetString(); if ((len = pFile->AppendString(PDF_NameEncode(str))) < 0) { return -1; } offset += len + 1; break; } case PDFOBJ_REFERENCE: { if (pFile->AppendString(FX_BSTRC(" ")) < 0) { return -1; } CPDF_Reference* p = (CPDF_Reference*)pObj; if ((len = pFile->AppendDWord(p->GetRefObjNum())) < 0) { return -1; } if (pFile->AppendString(FX_BSTRC(" 0 R ")) < 0) { return -1; } offset += len + 6; break; } case PDFOBJ_ARRAY: { if (pFile->AppendString(FX_BSTRC("[")) < 0) { return -1; } offset += 1; CPDF_Array* p = (CPDF_Array*)pObj; for (FX_DWORD i = 0; i < p->GetCount(); i++) { CPDF_Object* pElement = p->GetElement(i); if (pElement->GetObjNum()) { if (pFile->AppendString(FX_BSTRC(" ")) < 0) { return -1; } if ((len = pFile->AppendDWord(pElement->GetObjNum())) < 0) { return -1; } if (pFile->AppendString(FX_BSTRC(" 0 R")) < 0) { return -1; } offset += len + 5; } else { if (PDF_CreatorAppendObject(pElement, pFile, offset) < 0) { return -1; } } } if (pFile->AppendString(FX_BSTRC("]")) < 0) { return -1; } offset += 1; break; } case PDFOBJ_DICTIONARY: { if (pFile->AppendString(FX_BSTRC("<<")) < 0) { return -1; } offset += 2; CPDF_Dictionary* p = (CPDF_Dictionary*)pObj; FX_POSITION pos = p->GetStartPos(); while (pos) { CFX_ByteString key; CPDF_Object* pValue = p->GetNextElement(pos, key); if (pFile->AppendString(FX_BSTRC("/")) < 0) { return -1; } if ((len = pFile->AppendString(PDF_NameEncode(key))) < 0) { return -1; } offset += len + 1; if (pValue->GetObjNum()) { if (pFile->AppendString(FX_BSTRC(" ")) < 0) { return -1; } if ((len = pFile->AppendDWord(pValue->GetObjNum())) < 0) { return -1; } if (pFile->AppendString(FX_BSTRC(" 0 R")) < 0) { return -1; } offset += len + 5; } else { if (PDF_CreatorAppendObject(pValue, pFile, offset) < 0) { return -1; } } } if (pFile->AppendString(FX_BSTRC(">>")) < 0) { return -1; } offset += 2; break; } case PDFOBJ_STREAM: { CPDF_Stream* p = (CPDF_Stream*)pObj; if (PDF_CreatorAppendObject(p->GetDict(), pFile, offset) < 0) { return -1; } if (pFile->AppendString(FX_BSTRC("stream\r\n")) < 0) { return -1; } offset += 8; CPDF_StreamAcc acc; acc.LoadAllData(p, TRUE); if (pFile->AppendBlock(acc.GetData(), acc.GetSize()) < 0) { return -1; } offset += acc.GetSize(); if ((len = pFile->AppendString(FX_BSTRC("\r\nendstream"))) < 0) { return -1; } offset += len; break; } default: ASSERT(FALSE); break; } return 1; } int32_t PDF_CreatorWriteTrailer(CPDF_Document* pDocument, CFX_FileBufferArchive* pFile, CPDF_Array* pIDArray, FX_BOOL bCompress) { FX_FILESIZE offset = 0; int32_t len = 0; FXSYS_assert(pDocument && pFile); CPDF_Parser* pParser = (CPDF_Parser*)pDocument->GetParser(); if (pParser) { CPDF_Dictionary* p = pParser->GetTrailer(); FX_POSITION pos = p->GetStartPos(); while (pos) { CFX_ByteString key; CPDF_Object* pValue = p->GetNextElement(pos, key); if (key == FX_BSTRC("Encrypt") || key == FX_BSTRC("Size") || key == FX_BSTRC("Filter") || key == FX_BSTRC("Index") || key == FX_BSTRC("Length") || key == FX_BSTRC("Prev") || key == FX_BSTRC("W") || key == FX_BSTRC("XRefStm") || key == FX_BSTRC("Type") || key == FX_BSTRC("ID")) { continue; } if (bCompress && key == FX_BSTRC("DecodeParms")) { continue; } if (pFile->AppendString((FX_BSTRC("/"))) < 0) { return -1; } if ((len = pFile->AppendString(PDF_NameEncode(key))) < 0) { return -1; } offset += len + 1; if (pValue->GetObjNum()) { if (pFile->AppendString(FX_BSTRC(" ")) < 0) { return -1; } if ((len = pFile->AppendDWord(pValue->GetObjNum())) < 0) { return -1; } if (pFile->AppendString(FX_BSTRC(" 0 R ")) < 0) { return -1; } offset += len + 6; } else { if (PDF_CreatorAppendObject(pValue, pFile, offset) < 0) { return -1; } } } if (pIDArray) { if (pFile->AppendString((FX_BSTRC("/ID"))) < 0) { return -1; } offset += 3; if (PDF_CreatorAppendObject(pIDArray, pFile, offset) < 0) { return -1; } } return offset; } if (pFile->AppendString(FX_BSTRC("\r\n/Root ")) < 0) { return -1; } if ((len = pFile->AppendDWord(pDocument->GetRoot()->GetObjNum())) < 0) { return -1; } if (pFile->AppendString(FX_BSTRC(" 0 R\r\n")) < 0) { return -1; } offset += len + 14; if (pDocument->GetInfo()) { if (pFile->AppendString(FX_BSTRC("/Info ")) < 0) { return -1; } if ((len = pFile->AppendDWord(pDocument->GetInfo()->GetObjNum())) < 0) { return -1; } if (pFile->AppendString(FX_BSTRC(" 0 R\r\n")) < 0) { return -1; } offset += len + 12; } if (pIDArray) { if (pFile->AppendString((FX_BSTRC("/ID"))) < 0) { return -1; } offset += 3; if (PDF_CreatorAppendObject(pIDArray, pFile, offset) < 0) { return -1; } } return offset; } int32_t PDF_CreatorWriteEncrypt(const CPDF_Dictionary* pEncryptDict, FX_DWORD dwObjNum, CFX_FileBufferArchive* pFile) { if (!pEncryptDict) { return 0; } FXSYS_assert(pFile); FX_FILESIZE offset = 0; int32_t len = 0; if (pFile->AppendString(FX_BSTRC("/Encrypt")) < 0) { return -1; } offset += 8; if (pFile->AppendString(FX_BSTRC(" ")) < 0) { return -1; } if ((len = pFile->AppendDWord(dwObjNum)) < 0) { return -1; } if (pFile->AppendString(FX_BSTRC(" 0 R ")) < 0) { return -1; } offset += len + 6; return offset; } FX_BOOL PDF_GenerateFileID(FX_DWORD dwSeed1, FX_DWORD dwSeed2, FX_DWORD* pBuffer) { if (!pBuffer) { return FALSE; } void* pContext = FX_Random_MT_Start(dwSeed1); int32_t i = 0; for (i = 0; i < 2; i++) { *pBuffer++ = FX_Random_MT_Generate(pContext); } FX_Random_MT_Close(pContext); pContext = FX_Random_MT_Start(dwSeed2); for (i = 0; i < 2; i++) { *pBuffer++ = FX_Random_MT_Generate(pContext); } FX_Random_MT_Close(pContext); return TRUE; } class CPDF_FlateEncoder { public: CPDF_FlateEncoder(); ~CPDF_FlateEncoder(); FX_BOOL Initialize(CPDF_Stream* pStream, FX_BOOL bFlateEncode); FX_BOOL Initialize(const uint8_t* pBuffer, FX_DWORD size, FX_BOOL bFlateEncode, FX_BOOL bXRefStream = FALSE); void CloneDict(); uint8_t* m_pData; FX_DWORD m_dwSize; CPDF_Dictionary* m_pDict; FX_BOOL m_bCloned; FX_BOOL m_bNewData; CPDF_StreamAcc m_Acc; }; CPDF_FlateEncoder::CPDF_FlateEncoder() { m_pData = NULL; m_dwSize = 0; m_pDict = NULL; m_bCloned = FALSE; m_bNewData = FALSE; } void CPDF_FlateEncoder::CloneDict() { if (!m_bCloned) { m_pDict = (CPDF_Dictionary*)m_pDict->Clone(); m_bCloned = TRUE; } } FX_BOOL CPDF_FlateEncoder::Initialize(CPDF_Stream* pStream, FX_BOOL bFlateEncode) { m_Acc.LoadAllData(pStream, TRUE); if ((pStream && pStream->GetDict() && pStream->GetDict()->KeyExist("Filter")) || !bFlateEncode) { if (pStream->GetDict()->KeyExist("Filter") && !bFlateEncode) { CPDF_StreamAcc destAcc; destAcc.LoadAllData(pStream); m_dwSize = destAcc.GetSize(); m_pData = (uint8_t*)destAcc.DetachData(); m_pDict = (CPDF_Dictionary*)pStream->GetDict()->Clone(); m_pDict->RemoveAt(FX_BSTRC("Filter")); m_bNewData = TRUE; m_bCloned = TRUE; } else { m_pData = (uint8_t*)m_Acc.GetData(); m_dwSize = m_Acc.GetSize(); m_pDict = pStream->GetDict(); } return TRUE; } m_pData = NULL; m_dwSize = 0; m_bNewData = TRUE; m_bCloned = TRUE; ::FlateEncode(m_Acc.GetData(), m_Acc.GetSize(), m_pData, m_dwSize); m_pDict = (CPDF_Dictionary*)pStream->GetDict()->Clone(); m_pDict->SetAtInteger("Length", m_dwSize); m_pDict->SetAtName("Filter", "FlateDecode"); m_pDict->RemoveAt("DecodeParms"); return TRUE; } FX_BOOL CPDF_FlateEncoder::Initialize(const uint8_t* pBuffer, FX_DWORD size, FX_BOOL bFlateEncode, FX_BOOL bXRefStream) { if (!bFlateEncode) { m_pData = (uint8_t*)pBuffer; m_dwSize = size; return TRUE; } m_bNewData = TRUE; if (bXRefStream) { ::FlateEncode(pBuffer, size, 12, 1, 8, 7, m_pData, m_dwSize); } else { ::FlateEncode(pBuffer, size, m_pData, m_dwSize); } return TRUE; } CPDF_FlateEncoder::~CPDF_FlateEncoder() { if (m_bCloned && m_pDict) { m_pDict->Release(); } if (m_bNewData) { FX_Free(m_pData); } } class CPDF_Encryptor { public: CPDF_Encryptor(); ~CPDF_Encryptor(); FX_BOOL Initialize(CPDF_CryptoHandler* pHandler, int objnum, uint8_t* src_data, FX_DWORD src_size); uint8_t* m_pData; FX_DWORD m_dwSize; FX_BOOL m_bNewBuf; }; CPDF_Encryptor::CPDF_Encryptor() { m_pData = NULL; m_dwSize = 0; m_bNewBuf = FALSE; } FX_BOOL CPDF_Encryptor::Initialize(CPDF_CryptoHandler* pHandler, int objnum, uint8_t* src_data, FX_DWORD src_size) { if (src_size == 0) { return TRUE; } if (pHandler == NULL) { m_pData = (uint8_t*)src_data; m_dwSize = src_size; m_bNewBuf = FALSE; return TRUE; } m_dwSize = pHandler->EncryptGetSize(objnum, 0, src_data, src_size); m_pData = FX_Alloc(uint8_t, m_dwSize); pHandler->EncryptContent(objnum, 0, src_data, src_size, m_pData, m_dwSize); m_bNewBuf = TRUE; return TRUE; } CPDF_Encryptor::~CPDF_Encryptor() { if (m_bNewBuf) { FX_Free(m_pData); } } CPDF_ObjectStream::CPDF_ObjectStream() : m_dwObjNum(0), m_index(0) {} FX_BOOL CPDF_ObjectStream::Start() { m_ObjNumArray.RemoveAll(); m_OffsetArray.RemoveAll(); m_Buffer.Clear(); m_dwObjNum = 0; m_index = 0; return TRUE; } int32_t CPDF_ObjectStream::CompressIndirectObject(FX_DWORD dwObjNum, const CPDF_Object* pObj) { m_ObjNumArray.Add(dwObjNum); m_OffsetArray.Add(m_Buffer.GetLength()); m_Buffer << pObj; return 1; } int32_t CPDF_ObjectStream::CompressIndirectObject(FX_DWORD dwObjNum, const uint8_t* pBuffer, FX_DWORD dwSize) { m_ObjNumArray.Add(dwObjNum); m_OffsetArray.Add(m_Buffer.GetLength()); m_Buffer.AppendBlock(pBuffer, dwSize); return 1; } FX_FILESIZE CPDF_ObjectStream::End(CPDF_Creator* pCreator) { FXSYS_assert(pCreator); if (m_ObjNumArray.GetSize() == 0) { return 0; } CFX_FileBufferArchive* pFile = &pCreator->m_File; CPDF_CryptoHandler* pHandler = pCreator->m_pCryptoHandler; FX_FILESIZE ObjOffset = pCreator->m_Offset; if (!m_dwObjNum) { m_dwObjNum = ++pCreator->m_dwLastObjNum; } CFX_ByteTextBuf tempBuffer; int32_t iCount = m_ObjNumArray.GetSize(); for (int32_t i = 0; i < iCount; i++) { tempBuffer << m_ObjNumArray.ElementAt(i) << FX_BSTRC(" ") << m_OffsetArray.ElementAt(i) << FX_BSTRC(" "); } FX_FILESIZE& offset = pCreator->m_Offset; int32_t len = pFile->AppendDWord(m_dwObjNum); if (len < 0) { return -1; } offset += len; if ((len = pFile->AppendString(FX_BSTRC(" 0 obj\r\n<AppendDWord((FX_DWORD)iCount)) < 0) { return -1; } offset += len; if (pFile->AppendString(FX_BSTRC("/First ")) < 0) { return -1; } if ((len = pFile->AppendDWord((FX_DWORD)tempBuffer.GetLength())) < 0) { return -1; } if (pFile->AppendString(FX_BSTRC("/Length ")) < 0) { return -1; } offset += len + 15; if (!pCreator->m_bCompress && !pHandler) { if ((len = pFile->AppendDWord( (FX_DWORD)(tempBuffer.GetLength() + m_Buffer.GetLength()))) < 0) { return -1; } offset += len; if ((len = pFile->AppendString(FX_BSTRC(">>stream\r\n"))) < 0) { return -1; } if (pFile->AppendBlock(tempBuffer.GetBuffer(), tempBuffer.GetLength()) < 0) { return -1; } if (pFile->AppendBlock(m_Buffer.GetBuffer(), m_Buffer.GetLength()) < 0) { return -1; } offset += len + tempBuffer.GetLength() + m_Buffer.GetLength(); } else { tempBuffer << m_Buffer; CPDF_FlateEncoder encoder; encoder.Initialize(tempBuffer.GetBuffer(), tempBuffer.GetLength(), pCreator->m_bCompress); CPDF_Encryptor encryptor; encryptor.Initialize(pHandler, m_dwObjNum, encoder.m_pData, encoder.m_dwSize); if ((len = pFile->AppendDWord(encryptor.m_dwSize)) < 0) { return -1; } offset += len; if (pCreator->m_bCompress) { if (pFile->AppendString(FX_BSTRC("/Filter /FlateDecode")) < 0) { return -1; } offset += 20; } if ((len = pFile->AppendString(FX_BSTRC(">>stream\r\n"))) < 0) { return -1; } if (pFile->AppendBlock(encryptor.m_pData, encryptor.m_dwSize) < 0) { return -1; } offset += len + encryptor.m_dwSize; } if ((len = pFile->AppendString(FX_BSTRC("\r\nendstream\r\nendobj\r\n"))) < 0) { return -1; } offset += len; return ObjOffset; } CPDF_XRefStream::CPDF_XRefStream() : m_PrevOffset(0), m_dwTempObjNum(0), m_iSeg(0) {} FX_BOOL CPDF_XRefStream::Start() { m_IndexArray.RemoveAll(); m_Buffer.Clear(); m_iSeg = 0; return TRUE; } int32_t CPDF_XRefStream::CompressIndirectObject(FX_DWORD dwObjNum, const CPDF_Object* pObj, CPDF_Creator* pCreator) { if (!pCreator) { return 0; } m_ObjStream.CompressIndirectObject(dwObjNum, pObj); if (m_ObjStream.m_ObjNumArray.GetSize() < pCreator->m_ObjectStreamSize && m_ObjStream.m_Buffer.GetLength() < PDF_OBJECTSTREAM_MAXLENGTH) { return 1; } return EndObjectStream(pCreator); } int32_t CPDF_XRefStream::CompressIndirectObject(FX_DWORD dwObjNum, const uint8_t* pBuffer, FX_DWORD dwSize, CPDF_Creator* pCreator) { if (!pCreator) { return 0; } m_ObjStream.CompressIndirectObject(dwObjNum, pBuffer, dwSize); if (m_ObjStream.m_ObjNumArray.GetSize() < pCreator->m_ObjectStreamSize && m_ObjStream.m_Buffer.GetLength() < PDF_OBJECTSTREAM_MAXLENGTH) { return 1; } return EndObjectStream(pCreator); } static void _AppendIndex0(CFX_ByteTextBuf& buffer, FX_BOOL bFirstObject = TRUE) { buffer.AppendByte(0); buffer.AppendByte(0); buffer.AppendByte(0); buffer.AppendByte(0); buffer.AppendByte(0); if (bFirstObject) { buffer.AppendByte(0xFF); buffer.AppendByte(0xFF); } else { buffer.AppendByte(0); buffer.AppendByte(0); } } static void _AppendIndex1(CFX_ByteTextBuf& buffer, FX_FILESIZE offset) { buffer.AppendByte(1); buffer.AppendByte(FX_GETBYTEOFFSET24(offset)); buffer.AppendByte(FX_GETBYTEOFFSET16(offset)); buffer.AppendByte(FX_GETBYTEOFFSET8(offset)); buffer.AppendByte(FX_GETBYTEOFFSET0(offset)); buffer.AppendByte(0); buffer.AppendByte(0); } static void _AppendIndex2(CFX_ByteTextBuf& buffer, FX_DWORD objnum, int32_t index) { buffer.AppendByte(2); buffer.AppendByte(FX_GETBYTEOFFSET24(objnum)); buffer.AppendByte(FX_GETBYTEOFFSET16(objnum)); buffer.AppendByte(FX_GETBYTEOFFSET8(objnum)); buffer.AppendByte(FX_GETBYTEOFFSET0(objnum)); buffer.AppendByte(FX_GETBYTEOFFSET8(index)); buffer.AppendByte(FX_GETBYTEOFFSET0(index)); } int32_t CPDF_XRefStream::EndObjectStream(CPDF_Creator* pCreator, FX_BOOL bEOF) { FX_FILESIZE objOffset = 0; if (bEOF) { objOffset = m_ObjStream.End(pCreator); if (objOffset < 0) { return -1; } } FX_DWORD& dwObjStmNum = m_ObjStream.m_dwObjNum; if (!dwObjStmNum) { dwObjStmNum = ++pCreator->m_dwLastObjNum; } int32_t iSize = m_ObjStream.m_ObjNumArray.GetSize(); int32_t iSeg = m_IndexArray.GetSize() / 2; if (!(pCreator->m_dwFlags & FPDFCREATE_INCREMENTAL)) { if (m_dwTempObjNum == 0) { _AppendIndex0(m_Buffer); m_dwTempObjNum++; } FX_DWORD end_num = m_IndexArray.GetAt((iSeg - 1) * 2) + m_IndexArray.GetAt((iSeg - 1) * 2 + 1); int index = 0; for (; m_dwTempObjNum < end_num; m_dwTempObjNum++) { FX_FILESIZE* offset = pCreator->m_ObjectOffset.GetPtrAt(m_dwTempObjNum); if (offset) { if (index >= iSize || m_dwTempObjNum != m_ObjStream.m_ObjNumArray[index]) { _AppendIndex1(m_Buffer, *offset); } else { _AppendIndex2(m_Buffer, dwObjStmNum, index++); } } else { _AppendIndex0(m_Buffer, FALSE); } } if (iSize > 0 && bEOF) { pCreator->m_ObjectOffset.Add(dwObjStmNum, 1); pCreator->m_ObjectSize.Add(dwObjStmNum, 1); pCreator->m_ObjectOffset[dwObjStmNum] = objOffset; } m_iSeg = iSeg; if (bEOF) { m_ObjStream.Start(); } return 1; } int32_t& j = m_ObjStream.m_index; for (int i = m_iSeg; i < iSeg; i++) { FX_DWORD start = m_IndexArray.ElementAt(i * 2); FX_DWORD end = m_IndexArray.ElementAt(i * 2 + 1) + start; for (FX_DWORD m = start; m < end; m++) { if (j >= iSize || m != m_ObjStream.m_ObjNumArray.ElementAt(j)) { _AppendIndex1(m_Buffer, pCreator->m_ObjectOffset[m]); } else { _AppendIndex2(m_Buffer, dwObjStmNum, j++); } } } if (iSize > 0 && bEOF) { _AppendIndex1(m_Buffer, objOffset); m_IndexArray.Add(dwObjStmNum); m_IndexArray.Add(1); iSeg += 1; } m_iSeg = iSeg; if (bEOF) { m_ObjStream.Start(); } return 1; } FX_BOOL CPDF_XRefStream::GenerateXRefStream(CPDF_Creator* pCreator, FX_BOOL bEOF) { FX_FILESIZE offset_tmp = pCreator->m_Offset; FX_DWORD objnum = ++pCreator->m_dwLastObjNum; CFX_FileBufferArchive* pFile = &pCreator->m_File; FX_BOOL bIncremental = (pCreator->m_dwFlags & FPDFCREATE_INCREMENTAL) != 0; if (bIncremental) { AddObjectNumberToIndexArray(objnum); } else { for (; m_dwTempObjNum < pCreator->m_dwLastObjNum; m_dwTempObjNum++) { FX_FILESIZE* offset = pCreator->m_ObjectOffset.GetPtrAt(m_dwTempObjNum); if (offset) { _AppendIndex1(m_Buffer, *offset); } else { _AppendIndex0(m_Buffer, FALSE); } } } _AppendIndex1(m_Buffer, offset_tmp); FX_FILESIZE& offset = pCreator->m_Offset; int32_t len = pFile->AppendDWord(objnum); if (len < 0) { return FALSE; } offset += len; if ((len = pFile->AppendString( FX_BSTRC(" 0 obj\r\n<AppendDWord(0)) < 0) { return FALSE; } if ((len = pFile->AppendString(FX_BSTRC(" "))) < 0) { return FALSE; } offset += len + 1; if ((len = pFile->AppendDWord(objnum + 1)) < 0) { return FALSE; } offset += len; } else { int32_t iSeg = m_IndexArray.GetSize() / 2; for (int32_t i = 0; i < iSeg; i++) { if ((len = pFile->AppendDWord(m_IndexArray.ElementAt(i * 2))) < 0) { return FALSE; } if (pFile->AppendString(FX_BSTRC(" ")) < 0) { return FALSE; } offset += len + 1; if ((len = pFile->AppendDWord(m_IndexArray.ElementAt(i * 2 + 1))) < 0) { return FALSE; } if (pFile->AppendString(FX_BSTRC(" ")) < 0) { return FALSE; } offset += len + 1; } } if (pFile->AppendString(FX_BSTRC("]/Size ")) < 0) { return FALSE; } if ((len = pFile->AppendDWord(objnum + 1)) < 0) { return FALSE; } offset += len + 7; if (m_PrevOffset > 0) { if (pFile->AppendString(FX_BSTRC("/Prev ")) < 0) { return FALSE; } FX_CHAR offset_buf[20]; FXSYS_memset(offset_buf, 0, sizeof(offset_buf)); FXSYS_i64toa(m_PrevOffset, offset_buf, 10); int32_t len = (int32_t)FXSYS_strlen(offset_buf); if (pFile->AppendBlock(offset_buf, len) < 0) { return FALSE; } offset += len + 6; } FX_BOOL bPredictor = TRUE; CPDF_FlateEncoder encoder; encoder.Initialize(m_Buffer.GetBuffer(), m_Buffer.GetLength(), pCreator->m_bCompress, bPredictor); if (pCreator->m_bCompress) { if (pFile->AppendString(FX_BSTRC("/Filter /FlateDecode")) < 0) { return FALSE; } offset += 20; if (bPredictor) { if ((len = pFile->AppendString( FX_BSTRC("/DecodeParms<>"))) < 0) { return FALSE; } offset += len; } } if (pFile->AppendString(FX_BSTRC("/Length ")) < 0) { return FALSE; } if ((len = pFile->AppendDWord(encoder.m_dwSize)) < 0) { return FALSE; } offset += len + 8; if (bEOF) { if ((len = PDF_CreatorWriteTrailer(pCreator->m_pDocument, pFile, pCreator->m_pIDArray, pCreator->m_bCompress)) < 0) { return FALSE; } offset += len; if (pCreator->m_pEncryptDict) { FX_DWORD dwEncryptObjNum = pCreator->m_pEncryptDict->GetObjNum(); if (dwEncryptObjNum == 0) { dwEncryptObjNum = pCreator->m_dwEnryptObjNum; } if ((len = PDF_CreatorWriteEncrypt(pCreator->m_pEncryptDict, dwEncryptObjNum, pFile)) < 0) { return FALSE; } offset += len; } } if ((len = pFile->AppendString(FX_BSTRC(">>stream\r\n"))) < 0) { return FALSE; } offset += len; if (pFile->AppendBlock(encoder.m_pData, encoder.m_dwSize) < 0) { return FALSE; } if ((len = pFile->AppendString(FX_BSTRC("\r\nendstream\r\nendobj\r\n"))) < 0) { return FALSE; } offset += encoder.m_dwSize + len; m_PrevOffset = offset_tmp; return TRUE; } FX_BOOL CPDF_XRefStream::End(CPDF_Creator* pCreator, FX_BOOL bEOF) { if (EndObjectStream(pCreator, bEOF) < 0) { return FALSE; } return GenerateXRefStream(pCreator, bEOF); } FX_BOOL CPDF_XRefStream::EndXRefStream(CPDF_Creator* pCreator) { if (!(pCreator->m_dwFlags & FPDFCREATE_INCREMENTAL)) { _AppendIndex0(m_Buffer); for (FX_DWORD i = 1; i < pCreator->m_dwLastObjNum + 1; i++) { FX_FILESIZE* offset = pCreator->m_ObjectOffset.GetPtrAt(i); if (offset) { _AppendIndex1(m_Buffer, *offset); } else { _AppendIndex0(m_Buffer, FALSE); } } } else { int32_t iSeg = m_IndexArray.GetSize() / 2; for (int i = 0; i < iSeg; i++) { FX_DWORD start = m_IndexArray.ElementAt(i * 2); FX_DWORD end = m_IndexArray.ElementAt(i * 2 + 1) + start; for (FX_DWORD j = start; j < end; j++) { _AppendIndex1(m_Buffer, pCreator->m_ObjectOffset[j]); } } } return GenerateXRefStream(pCreator, FALSE); } FX_BOOL CPDF_XRefStream::AddObjectNumberToIndexArray(FX_DWORD objnum) { int32_t iSize = m_IndexArray.GetSize(); if (iSize == 0) { m_IndexArray.Add(objnum); m_IndexArray.Add(1); } else { FXSYS_assert(iSize > 1); FX_DWORD startobjnum = m_IndexArray.ElementAt(iSize - 2); int32_t iCount = m_IndexArray.ElementAt(iSize - 1); if (objnum == startobjnum + iCount) { m_IndexArray[iSize - 1] = iCount + 1; } else { m_IndexArray.Add(objnum); m_IndexArray.Add(1); } } return TRUE; } CPDF_Creator::CPDF_Creator(CPDF_Document* pDoc) { m_pDocument = pDoc; m_pParser = (CPDF_Parser*)pDoc->m_pParser; m_bCompress = TRUE; if (m_pParser) { m_pEncryptDict = m_pParser->GetEncryptDict(); m_pCryptoHandler = m_pParser->GetCryptoHandler(); } else { m_pEncryptDict = NULL; m_pCryptoHandler = NULL; } m_bSecurityChanged = FALSE; m_bStandardSecurity = FALSE; m_pMetadata = NULL; m_bEncryptCloned = FALSE; m_bEncryptMetadata = FALSE; m_Offset = 0; m_iStage = -1; m_dwFlags = 0; m_Pos = NULL; m_XrefStart = 0; m_pXRefStream = NULL; m_ObjectStreamSize = 200; m_dwLastObjNum = m_pDocument->GetLastObjNum(); m_pIDArray = NULL; m_FileVersion = 0; m_dwEnryptObjNum = 0; m_bNewCrypto = FALSE; } CPDF_Creator::~CPDF_Creator() { ResetStandardSecurity(); if (m_bEncryptCloned && m_pEncryptDict) { m_pEncryptDict->Release(); m_pEncryptDict = NULL; } Clear(); } static FX_BOOL _IsXRefNeedEnd(CPDF_XRefStream* pXRef, FX_DWORD flag) { if (!(flag & FPDFCREATE_INCREMENTAL)) { return FALSE; } int32_t iSize = pXRef->m_IndexArray.GetSize() / 2; int32_t iCount = 0; for (int32_t i = 0; i < iSize; i++) { iCount += pXRef->m_IndexArray.ElementAt(i * 2 + 1); } return (iCount >= PDF_XREFSTREAM_MAXSIZE); } int32_t CPDF_Creator::WriteIndirectObjectToStream(const CPDF_Object* pObj) { if (!m_pXRefStream) { return 1; } FX_DWORD objnum = pObj->GetObjNum(); if (m_pParser && m_pParser->m_ObjVersion.GetSize() > (int32_t)objnum && m_pParser->m_ObjVersion[objnum] > 0) { return 1; } if (pObj->GetType() == PDFOBJ_NUMBER) { return 1; } CPDF_Dictionary* pDict = pObj->GetDict(); if (pObj->GetType() == PDFOBJ_STREAM) { if (pDict && pDict->GetString(FX_BSTRC("Type")) == FX_BSTRC("XRef")) { return 0; } return 1; } if (pDict) { if (pDict == m_pDocument->m_pRootDict || pDict == m_pEncryptDict) { return 1; } if (IsSignatureDict(pDict)) { return 1; } if (pDict->GetString(FX_BSTRC("Type")) == FX_BSTRC("Page")) { return 1; } } m_pXRefStream->AddObjectNumberToIndexArray(objnum); if (m_pXRefStream->CompressIndirectObject(objnum, pObj, this) < 0) { return -1; } if (!_IsXRefNeedEnd(m_pXRefStream, m_dwFlags)) { return 0; } if (!m_pXRefStream->End(this)) { return -1; } if (!m_pXRefStream->Start()) { return -1; } return 0; } int32_t CPDF_Creator::WriteIndirectObjectToStream(FX_DWORD objnum, const uint8_t* pBuffer, FX_DWORD dwSize) { if (!m_pXRefStream) { return 1; } m_pXRefStream->AddObjectNumberToIndexArray(objnum); int32_t iRet = m_pXRefStream->CompressIndirectObject(objnum, pBuffer, dwSize, this); if (iRet < 1) { return iRet; } if (!_IsXRefNeedEnd(m_pXRefStream, m_dwFlags)) { return 0; } if (!m_pXRefStream->End(this)) { return -1; } if (!m_pXRefStream->Start()) { return -1; } return 0; } int32_t CPDF_Creator::AppendObjectNumberToXRef(FX_DWORD objnum) { if (!m_pXRefStream) { return 1; } m_pXRefStream->AddObjectNumberToIndexArray(objnum); if (!_IsXRefNeedEnd(m_pXRefStream, m_dwFlags)) { return 0; } if (!m_pXRefStream->End(this)) { return -1; } if (!m_pXRefStream->Start()) { return -1; } return 0; } int32_t CPDF_Creator::WriteStream(const CPDF_Object* pStream, FX_DWORD objnum, CPDF_CryptoHandler* pCrypto) { CPDF_FlateEncoder encoder; encoder.Initialize((CPDF_Stream*)pStream, pStream == m_pMetadata ? FALSE : m_bCompress); CPDF_Encryptor encryptor; if (!encryptor.Initialize(pCrypto, objnum, encoder.m_pData, encoder.m_dwSize)) { return -1; } if ((FX_DWORD)encoder.m_pDict->GetInteger(FX_BSTRC("Length")) != encryptor.m_dwSize) { encoder.CloneDict(); encoder.m_pDict->SetAtInteger(FX_BSTRC("Length"), encryptor.m_dwSize); } if (WriteDirectObj(objnum, encoder.m_pDict) < 0) { return -1; } int len = m_File.AppendString(FX_BSTRC("stream\r\n")); if (len < 0) { return -1; } m_Offset += len; if (m_File.AppendBlock(encryptor.m_pData, encryptor.m_dwSize) < 0) { return -1; } m_Offset += encryptor.m_dwSize; if ((len = m_File.AppendString(FX_BSTRC("\r\nendstream"))) < 0) { return -1; } m_Offset += len; return 1; } int32_t CPDF_Creator::WriteIndirectObj(FX_DWORD objnum, const CPDF_Object* pObj) { int32_t len = m_File.AppendDWord(objnum); if (len < 0) { return -1; } m_Offset += len; if ((len = m_File.AppendString(FX_BSTRC(" 0 obj\r\n"))) < 0) { return -1; } m_Offset += len; if (pObj->GetType() == PDFOBJ_STREAM) { CPDF_CryptoHandler* pHandler = NULL; pHandler = (pObj == m_pMetadata && !m_bEncryptMetadata) ? NULL : m_pCryptoHandler; if (WriteStream(pObj, objnum, pHandler) < 0) { return -1; } } else { if (WriteDirectObj(objnum, pObj) < 0) { return -1; } } if ((len = m_File.AppendString(FX_BSTRC("\r\nendobj\r\n"))) < 0) { return -1; } m_Offset += len; if (AppendObjectNumberToXRef(objnum) < 0) { return -1; } return 0; } int32_t CPDF_Creator::WriteIndirectObj(const CPDF_Object* pObj) { int32_t iRet = WriteIndirectObjectToStream(pObj); if (iRet < 1) { return iRet; } return WriteIndirectObj(pObj->GetObjNum(), pObj); } int32_t CPDF_Creator::WriteDirectObj(FX_DWORD objnum, const CPDF_Object* pObj, FX_BOOL bEncrypt) { int32_t len = 0; if (pObj == NULL) { if (m_File.AppendString(FX_BSTRC(" null")) < 0) { return -1; } m_Offset += 5; return 1; } switch (pObj->GetType()) { case PDFOBJ_NULL: if (m_File.AppendString(FX_BSTRC(" null")) < 0) { return -1; } m_Offset += 5; break; case PDFOBJ_BOOLEAN: case PDFOBJ_NUMBER: if (m_File.AppendString(FX_BSTRC(" ")) < 0) { return -1; } if ((len = m_File.AppendString(pObj->GetString())) < 0) { return -1; } m_Offset += len + 1; break; case PDFOBJ_STRING: { CFX_ByteString str = pObj->GetString(); FX_BOOL bHex = ((CPDF_String*)pObj)->IsHex(); if (m_pCryptoHandler == NULL || !bEncrypt) { CFX_ByteString content = PDF_EncodeString(str, bHex); if ((len = m_File.AppendString(content)) < 0) { return -1; } m_Offset += len; break; } CPDF_Encryptor encryptor; encryptor.Initialize(m_pCryptoHandler, objnum, (uint8_t*)str.c_str(), str.GetLength()); CFX_ByteString content = PDF_EncodeString( CFX_ByteString((const FX_CHAR*)encryptor.m_pData, encryptor.m_dwSize), bHex); if ((len = m_File.AppendString(content)) < 0) { return -1; } m_Offset += len; break; } case PDFOBJ_STREAM: { CPDF_FlateEncoder encoder; encoder.Initialize((CPDF_Stream*)pObj, m_bCompress); CPDF_Encryptor encryptor; CPDF_CryptoHandler* pHandler = m_pCryptoHandler; encryptor.Initialize(pHandler, objnum, encoder.m_pData, encoder.m_dwSize); if ((FX_DWORD)encoder.m_pDict->GetInteger(FX_BSTRC("Length")) != encryptor.m_dwSize) { encoder.CloneDict(); encoder.m_pDict->SetAtInteger(FX_BSTRC("Length"), encryptor.m_dwSize); } if (WriteDirectObj(objnum, encoder.m_pDict) < 0) { return -1; } if ((len = m_File.AppendString(FX_BSTRC("stream\r\n"))) < 0) { return -1; } m_Offset += len; if (m_File.AppendBlock(encryptor.m_pData, encryptor.m_dwSize) < 0) { return -1; } m_Offset += encryptor.m_dwSize; if ((len = m_File.AppendString(FX_BSTRC("\r\nendstream"))) < 0) { return -1; } m_Offset += len; break; } case PDFOBJ_NAME: { if (m_File.AppendString(FX_BSTRC("/")) < 0) { return -1; } CFX_ByteString str = pObj->GetString(); if ((len = m_File.AppendString(PDF_NameEncode(str))) < 0) { return -1; } m_Offset += len + 1; break; } case PDFOBJ_REFERENCE: { if (m_File.AppendString(FX_BSTRC(" ")) < 0) { return -1; } CPDF_Reference* p = (CPDF_Reference*)pObj; if ((len = m_File.AppendDWord(p->GetRefObjNum())) < 0) { return -1; } if (m_File.AppendString(FX_BSTRC(" 0 R")) < 0) { return -1; } m_Offset += len + 5; break; } case PDFOBJ_ARRAY: { if (m_File.AppendString(FX_BSTRC("[")) < 0) { return -1; } m_Offset += 1; CPDF_Array* p = (CPDF_Array*)pObj; for (FX_DWORD i = 0; i < p->GetCount(); i++) { CPDF_Object* pElement = p->GetElement(i); if (pElement->GetObjNum()) { if (m_File.AppendString(FX_BSTRC(" ")) < 0) { return -1; } if ((len = m_File.AppendDWord(pElement->GetObjNum())) < 0) { return -1; } if (m_File.AppendString(FX_BSTRC(" 0 R")) < 0) { return -1; } m_Offset += len + 5; } else { if (WriteDirectObj(objnum, pElement) < 0) { return -1; } } } if (m_File.AppendString(FX_BSTRC("]")) < 0) { return -1; } m_Offset += 1; break; } case PDFOBJ_DICTIONARY: { if (m_pCryptoHandler == NULL || pObj == m_pEncryptDict) { return PDF_CreatorAppendObject(pObj, &m_File, m_Offset); } if (m_File.AppendString(FX_BSTRC("<<")) < 0) { return -1; } m_Offset += 2; CPDF_Dictionary* p = (CPDF_Dictionary*)pObj; FX_BOOL bSignDict = IsSignatureDict(p); FX_POSITION pos = p->GetStartPos(); while (pos) { FX_BOOL bSignValue = FALSE; CFX_ByteString key; CPDF_Object* pValue = p->GetNextElement(pos, key); if (m_File.AppendString(FX_BSTRC("/")) < 0) { return -1; } if ((len = m_File.AppendString(PDF_NameEncode(key))) < 0) { return -1; } m_Offset += len + 1; if (bSignDict && key == FX_BSTRC("Contents")) { bSignValue = TRUE; } if (pValue->GetObjNum()) { if (m_File.AppendString(FX_BSTRC(" ")) < 0) { return -1; } if ((len = m_File.AppendDWord(pValue->GetObjNum())) < 0) { return -1; } if (m_File.AppendString(FX_BSTRC(" 0 R ")) < 0) { return -1; } m_Offset += len + 6; } else { if (WriteDirectObj(objnum, pValue, !bSignValue) < 0) { return -1; } } } if (m_File.AppendString(FX_BSTRC(">>")) < 0) { return -1; } m_Offset += 2; break; } } return 1; } int32_t CPDF_Creator::WriteOldIndirectObject(FX_DWORD objnum) { if (m_pParser->m_V5Type[objnum] == 0 || m_pParser->m_V5Type[objnum] == 255) { return 0; } m_ObjectOffset[objnum] = m_Offset; void* valuetemp = NULL; FX_BOOL bExistInMap = m_pDocument->m_IndirectObjs.Lookup((void*)(uintptr_t)objnum, valuetemp); FX_BOOL bObjStm = (m_pParser->m_V5Type[objnum] == 2) && m_pEncryptDict && !m_pXRefStream; if (m_pParser->m_bVersionUpdated || m_bSecurityChanged || bExistInMap || bObjStm) { CPDF_Object* pObj = m_pDocument->GetIndirectObject(objnum); if (pObj == NULL) { m_ObjectOffset[objnum] = 0; m_ObjectSize[objnum] = 0; return 0; } if (WriteIndirectObj(pObj)) { return -1; } if (!bExistInMap) { m_pDocument->ReleaseIndirectObject(objnum); } } else { uint8_t* pBuffer; FX_DWORD size; m_pParser->GetIndirectBinary(objnum, pBuffer, size); if (pBuffer == NULL) { return 0; } if (m_pParser->m_V5Type[objnum] == 2) { if (m_pXRefStream) { if (WriteIndirectObjectToStream(objnum, pBuffer, size) < 0) { FX_Free(pBuffer); return -1; } } else { int32_t len = m_File.AppendDWord(objnum); if (len < 0) { return -1; } if (m_File.AppendString(FX_BSTRC(" 0 obj ")) < 0) { return -1; } m_Offset += len + 7; if (m_File.AppendBlock(pBuffer, size) < 0) { return -1; } m_Offset += size; if (m_File.AppendString(FX_BSTRC("\r\nendobj\r\n")) < 0) { return -1; } m_Offset += 10; } } else { if (m_File.AppendBlock(pBuffer, size) < 0) { return -1; } m_Offset += size; if (AppendObjectNumberToXRef(objnum) < 0) { return -1; } } FX_Free(pBuffer); } return 1; } int32_t CPDF_Creator::WriteOldObjs(IFX_Pause* pPause) { FX_DWORD nOldSize = m_pParser->m_CrossRef.GetSize(); FX_DWORD objnum = (FX_DWORD)(uintptr_t)m_Pos; for (; objnum < nOldSize; objnum++) { int32_t iRet = WriteOldIndirectObject(objnum); if (!iRet) { continue; } if (iRet < 0) { return iRet; } m_ObjectSize[objnum] = (FX_DWORD)(m_Offset - m_ObjectOffset[objnum]); if (pPause && pPause->NeedToPauseNow()) { m_Pos = (void*)(uintptr_t)(objnum + 1); return 1; } } return 0; } int32_t CPDF_Creator::WriteNewObjs(FX_BOOL bIncremental, IFX_Pause* pPause) { int32_t iCount = m_NewObjNumArray.GetSize(); int32_t index = (int32_t)(uintptr_t)m_Pos; while (index < iCount) { FX_DWORD objnum = m_NewObjNumArray.ElementAt(index); CPDF_Object* pObj = NULL; m_pDocument->m_IndirectObjs.Lookup((void*)(uintptr_t)objnum, (void*&)pObj); if (NULL == pObj) { ++index; continue; } m_ObjectOffset[objnum] = m_Offset; if (WriteIndirectObj(pObj)) { return -1; } m_ObjectSize[objnum] = (FX_DWORD)(m_Offset - m_ObjectOffset[objnum]); index++; if (pPause && pPause->NeedToPauseNow()) { m_Pos = (FX_POSITION)(uintptr_t)index; return 1; } } return 0; } void CPDF_Creator::InitOldObjNumOffsets() { if (!m_pParser) { return; } FX_DWORD j = 0; FX_DWORD dwStart = 0; FX_DWORD dwEnd = m_pParser->GetLastObjNum(); while (dwStart <= dwEnd) { while (dwStart <= dwEnd && (m_pParser->m_V5Type[dwStart] == 0 || m_pParser->m_V5Type[dwStart] == 255)) { dwStart++; } if (dwStart > dwEnd) { break; } j = dwStart; while (j <= dwEnd && m_pParser->m_V5Type[j] != 0 && m_pParser->m_V5Type[j] != 255) { j++; } m_ObjectOffset.Add(dwStart, j - dwStart); m_ObjectSize.Add(dwStart, j - dwStart); dwStart = j; } } void CPDF_Creator::InitNewObjNumOffsets() { FX_BOOL bIncremental = (m_dwFlags & FPDFCREATE_INCREMENTAL) != 0; FX_BOOL bNoOriginal = (m_dwFlags & FPDFCREATE_NO_ORIGINAL) != 0; FX_DWORD nOldSize = m_pParser ? m_pParser->m_CrossRef.GetSize() : 0; FX_POSITION pos = m_pDocument->m_IndirectObjs.GetStartPosition(); while (pos) { size_t key = 0; CPDF_Object* pObj; m_pDocument->m_IndirectObjs.GetNextAssoc(pos, (void*&)key, (void*&)pObj); FX_DWORD objnum = (FX_DWORD)key; if (pObj->GetObjNum() == -1) { continue; } if (bIncremental) { if (!pObj->IsModified()) { continue; } } else { if (objnum < nOldSize && m_pParser->m_V5Type[objnum] != 0) { continue; } } AppendNewObjNum(objnum); } int32_t iCount = m_NewObjNumArray.GetSize(); if (iCount == 0) { return; } int32_t i = 0; FX_DWORD dwStartObjNum = 0; FX_BOOL bCrossRefValid = m_pParser && m_pParser->GetLastXRefOffset() > 0; while (i < iCount) { dwStartObjNum = m_NewObjNumArray.ElementAt(i); if ((bIncremental && (bNoOriginal || bCrossRefValid)) || !m_ObjectOffset.GetPtrAt(dwStartObjNum)) { break; } i++; } if (i >= iCount) { return; } FX_DWORD dwLastObjNum = dwStartObjNum; i++; FX_BOOL bNewStart = FALSE; for (; i < iCount; i++) { FX_DWORD dwCurObjNum = m_NewObjNumArray.ElementAt(i); FX_BOOL bExist = (dwCurObjNum < nOldSize && m_ObjectOffset.GetPtrAt(dwCurObjNum) != NULL); if (bExist || dwCurObjNum - dwLastObjNum > 1) { if (!bNewStart) { m_ObjectOffset.Add(dwStartObjNum, dwLastObjNum - dwStartObjNum + 1); m_ObjectSize.Add(dwStartObjNum, dwLastObjNum - dwStartObjNum + 1); } dwStartObjNum = dwCurObjNum; } if (bNewStart) { dwStartObjNum = dwCurObjNum; } bNewStart = bExist; dwLastObjNum = dwCurObjNum; } m_ObjectOffset.Add(dwStartObjNum, dwLastObjNum - dwStartObjNum + 1); m_ObjectSize.Add(dwStartObjNum, dwLastObjNum - dwStartObjNum + 1); } void CPDF_Creator::AppendNewObjNum(FX_DWORD objbum) { int32_t iStart = 0, iFind = 0; int32_t iEnd = m_NewObjNumArray.GetUpperBound(); while (iStart <= iEnd) { int32_t iMid = (iStart + iEnd) / 2; FX_DWORD dwMid = m_NewObjNumArray.ElementAt(iMid); if (objbum < dwMid) { iEnd = iMid - 1; } else { if (iMid == iEnd) { iFind = iMid + 1; break; } FX_DWORD dwNext = m_NewObjNumArray.ElementAt(iMid + 1); if (objbum < dwNext) { iFind = iMid + 1; break; } iStart = iMid + 1; } } m_NewObjNumArray.InsertAt(iFind, objbum); } int32_t CPDF_Creator::WriteDoc_Stage1(IFX_Pause* pPause) { FXSYS_assert(m_iStage > -1 || m_iStage < 20); if (m_iStage == 0) { if (m_pParser == NULL) { m_dwFlags &= ~FPDFCREATE_INCREMENTAL; } if (m_bSecurityChanged && (m_dwFlags & FPDFCREATE_NO_ORIGINAL) == 0) { m_dwFlags &= ~FPDFCREATE_INCREMENTAL; } CPDF_Dictionary* pDict = m_pDocument->GetRoot(); m_pMetadata = pDict ? pDict->GetElementValue(FX_BSTRC("Metadata")) : NULL; if (m_dwFlags & FPDFCREATE_OBJECTSTREAM) { m_pXRefStream = new CPDF_XRefStream; m_pXRefStream->Start(); if ((m_dwFlags & FPDFCREATE_INCREMENTAL) != 0 && m_pParser) { FX_FILESIZE prev = m_pParser->GetLastXRefOffset(); m_pXRefStream->m_PrevOffset = prev; } } m_iStage = 10; } if (m_iStage == 10) { if ((m_dwFlags & FPDFCREATE_INCREMENTAL) == 0) { if (m_File.AppendString(FX_BSTRC("%PDF-1.")) < 0) { return -1; } m_Offset += 7; int32_t version = 7; if (m_FileVersion) { version = m_FileVersion; } else if (m_pParser) { version = m_pParser->GetFileVersion(); } int32_t len = m_File.AppendDWord(version % 10); if (len < 0) { return -1; } m_Offset += len; if ((len = m_File.AppendString(FX_BSTRC("\r\n%\xA1\xB3\xC5\xD7\r\n"))) < 0) { return -1; } m_Offset += len; InitOldObjNumOffsets(); m_iStage = 20; } else { IFX_FileRead* pSrcFile = m_pParser->GetFileAccess(); m_Offset = pSrcFile->GetSize(); m_Pos = (void*)(uintptr_t)m_Offset; m_iStage = 15; } } if (m_iStage == 15) { if ((m_dwFlags & FPDFCREATE_NO_ORIGINAL) == 0 && m_Pos) { IFX_FileRead* pSrcFile = m_pParser->GetFileAccess(); uint8_t buffer[4096]; FX_DWORD src_size = (FX_DWORD)(uintptr_t)m_Pos; while (src_size) { FX_DWORD block_size = src_size > 4096 ? 4096 : src_size; if (!pSrcFile->ReadBlock(buffer, m_Offset - src_size, block_size)) { return -1; } if (m_File.AppendBlock(buffer, block_size) < 0) { return -1; } src_size -= block_size; if (pPause && pPause->NeedToPauseNow()) { m_Pos = (void*)(uintptr_t)src_size; return 1; } } } if ((m_dwFlags & FPDFCREATE_NO_ORIGINAL) == 0 && m_pParser->GetLastXRefOffset() == 0) { InitOldObjNumOffsets(); FX_DWORD dwEnd = m_pParser->GetLastObjNum(); FX_BOOL bObjStm = (m_dwFlags & FPDFCREATE_OBJECTSTREAM) != 0; for (FX_DWORD objnum = 0; objnum <= dwEnd; objnum++) { if (m_pParser->m_V5Type[objnum] == 0 || m_pParser->m_V5Type[objnum] == 255) { continue; } m_ObjectOffset[objnum] = m_pParser->m_CrossRef[objnum]; if (bObjStm) { m_pXRefStream->AddObjectNumberToIndexArray(objnum); } } if (bObjStm) { m_pXRefStream->EndXRefStream(this); m_pXRefStream->Start(); } } m_iStage = 20; } InitNewObjNumOffsets(); return m_iStage; } int32_t CPDF_Creator::WriteDoc_Stage2(IFX_Pause* pPause) { FXSYS_assert(m_iStage >= 20 || m_iStage < 30); if (m_iStage == 20) { if ((m_dwFlags & FPDFCREATE_INCREMENTAL) == 0 && m_pParser) { m_Pos = (void*)(uintptr_t)0; m_iStage = 21; } else { m_iStage = 25; } } if (m_iStage == 21) { int32_t iRet = WriteOldObjs(pPause); if (iRet) { return iRet; } m_iStage = 25; } if (m_iStage == 25) { m_Pos = (void*)(uintptr_t)0; m_iStage = 26; } if (m_iStage == 26) { int32_t iRet = WriteNewObjs((m_dwFlags & FPDFCREATE_INCREMENTAL) != 0, pPause); if (iRet) { return iRet; } m_iStage = 27; } if (m_iStage == 27) { if (NULL != m_pEncryptDict && 0 == m_pEncryptDict->GetObjNum()) { m_dwLastObjNum += 1; FX_FILESIZE saveOffset = m_Offset; if (WriteIndirectObj(m_dwLastObjNum, m_pEncryptDict) < 0) { return -1; } m_ObjectOffset.Add(m_dwLastObjNum, 1); m_ObjectOffset[m_dwLastObjNum] = saveOffset; m_ObjectSize.Add(m_dwLastObjNum, 1); m_ObjectSize[m_dwLastObjNum] = m_Offset - saveOffset; m_dwEnryptObjNum = m_dwLastObjNum; if (m_dwFlags & FPDFCREATE_INCREMENTAL) { m_NewObjNumArray.Add(m_dwLastObjNum); } } m_iStage = 80; } return m_iStage; } int32_t CPDF_Creator::WriteDoc_Stage3(IFX_Pause* pPause) { FXSYS_assert(m_iStage >= 80 || m_iStage < 90); FX_DWORD dwLastObjNum = m_dwLastObjNum; if (m_iStage == 80) { m_XrefStart = m_Offset; if (m_dwFlags & FPDFCREATE_OBJECTSTREAM) { m_pXRefStream->End(this, TRUE); m_XrefStart = m_pXRefStream->m_PrevOffset; m_iStage = 90; } else if ((m_dwFlags & FPDFCREATE_INCREMENTAL) == 0 || !m_pParser->IsXRefStream()) { if ((m_dwFlags & FPDFCREATE_INCREMENTAL) == 0 || m_pParser->GetLastXRefOffset() == 0) { CFX_ByteString str; str = m_ObjectOffset.GetPtrAt(1) ? FX_BSTRC("xref\r\n") : FX_BSTRC("xref\r\n0 1\r\n0000000000 65536 f\r\n"); if (m_File.AppendString(str) < 0) { return -1; } m_Pos = (void*)(uintptr_t)1; m_iStage = 81; } else { if (m_File.AppendString(FX_BSTRC("xref\r\n")) < 0) { return -1; } m_Pos = (void*)(uintptr_t)0; m_iStage = 82; } } else { m_iStage = 90; } } if (m_iStage == 81) { CFX_ByteString str; FX_DWORD i = (FX_DWORD)(uintptr_t)m_Pos, j; while (i <= dwLastObjNum) { while (i <= dwLastObjNum && !m_ObjectOffset.GetPtrAt(i)) { i++; } if (i > dwLastObjNum) { break; } j = i; while (j <= dwLastObjNum && m_ObjectOffset.GetPtrAt(j)) { j++; } if (i == 1) { str.Format("0 %d\r\n0000000000 65536 f\r\n", j); } else { str.Format("%d %d\r\n", i, j - i); } if (m_File.AppendBlock(str.c_str(), str.GetLength()) < 0) { return -1; } while (i < j) { str.Format("%010d 00000 n\r\n", m_ObjectOffset[i++]); if (m_File.AppendBlock(str.c_str(), str.GetLength()) < 0) { return -1; } } if (i > dwLastObjNum) { break; } if (pPause && pPause->NeedToPauseNow()) { m_Pos = (void*)(uintptr_t)i; return 1; } } m_iStage = 90; } if (m_iStage == 82) { CFX_ByteString str; int32_t iCount = m_NewObjNumArray.GetSize(); int32_t i = (int32_t)(uintptr_t)m_Pos; while (i < iCount) { int32_t j = i; FX_DWORD objnum = m_NewObjNumArray.ElementAt(i); while (j < iCount) { if (++j == iCount) { break; } FX_DWORD dwCurrent = m_NewObjNumArray.ElementAt(j); if (dwCurrent - objnum > 1) { break; } objnum = dwCurrent; } objnum = m_NewObjNumArray.ElementAt(i); if (objnum == 1) { str.Format("0 %d\r\n0000000000 65536 f\r\n", j - i + 1); } else { str.Format("%d %d\r\n", objnum, j - i); } if (m_File.AppendBlock(str.c_str(), str.GetLength()) < 0) { return -1; } while (i < j) { objnum = m_NewObjNumArray.ElementAt(i++); str.Format("%010d 00000 n\r\n", m_ObjectOffset[objnum]); if (m_File.AppendBlock(str.c_str(), str.GetLength()) < 0) { return -1; } } if (pPause && (i % 100) == 0 && pPause->NeedToPauseNow()) { m_Pos = (void*)(uintptr_t)i; return 1; } } m_iStage = 90; } return m_iStage; } static int32_t _OutPutIndex(CFX_FileBufferArchive* pFile, FX_FILESIZE offset) { FXSYS_assert(pFile); if (sizeof(offset) > 4) { if (FX_GETBYTEOFFSET32(offset)) { if (pFile->AppendByte(FX_GETBYTEOFFSET56(offset)) < 0) { return -1; } if (pFile->AppendByte(FX_GETBYTEOFFSET48(offset)) < 0) { return -1; } if (pFile->AppendByte(FX_GETBYTEOFFSET40(offset)) < 0) { return -1; } if (pFile->AppendByte(FX_GETBYTEOFFSET32(offset)) < 0) { return -1; } } } if (pFile->AppendByte(FX_GETBYTEOFFSET24(offset)) < 0) { return -1; } if (pFile->AppendByte(FX_GETBYTEOFFSET16(offset)) < 0) { return -1; } if (pFile->AppendByte(FX_GETBYTEOFFSET8(offset)) < 0) { return -1; } if (pFile->AppendByte(FX_GETBYTEOFFSET0(offset)) < 0) { return -1; } if (pFile->AppendByte(0) < 0) { return -1; } return 0; } int32_t CPDF_Creator::WriteDoc_Stage4(IFX_Pause* pPause) { FXSYS_assert(m_iStage >= 90); if ((m_dwFlags & FPDFCREATE_OBJECTSTREAM) == 0) { FX_BOOL bXRefStream = (m_dwFlags & FPDFCREATE_INCREMENTAL) != 0 && m_pParser->IsXRefStream(); if (!bXRefStream) { if (m_File.AppendString(FX_BSTRC("trailer\r\n<<")) < 0) { return -1; } } else { if (m_File.AppendDWord(m_pDocument->m_LastObjNum + 1) < 0) { return -1; } if (m_File.AppendString(FX_BSTRC(" 0 obj <<")) < 0) { return -1; } } if (m_pParser) { CPDF_Dictionary* p = m_pParser->m_pTrailer; FX_POSITION pos = p->GetStartPos(); while (pos) { CFX_ByteString key; CPDF_Object* pValue = p->GetNextElement(pos, key); if (key == FX_BSTRC("Encrypt") || key == FX_BSTRC("Size") || key == FX_BSTRC("Filter") || key == FX_BSTRC("Index") || key == FX_BSTRC("Length") || key == FX_BSTRC("Prev") || key == FX_BSTRC("W") || key == FX_BSTRC("XRefStm") || key == FX_BSTRC("ID")) { continue; } if (m_File.AppendString((FX_BSTRC("/"))) < 0) { return -1; } if (m_File.AppendString(PDF_NameEncode(key)) < 0) { return -1; } if (pValue->GetObjNum()) { if (m_File.AppendString(FX_BSTRC(" ")) < 0) { return -1; } if (m_File.AppendDWord(pValue->GetObjNum()) < 0) { return -1; } if (m_File.AppendString(FX_BSTRC(" 0 R ")) < 0) { return -1; } } else { FX_FILESIZE offset = 0; if (PDF_CreatorAppendObject(pValue, &m_File, offset) < 0) { return -1; } } } } else { if (m_File.AppendString(FX_BSTRC("\r\n/Root ")) < 0) { return -1; } if (m_File.AppendDWord(m_pDocument->m_pRootDict->GetObjNum()) < 0) { return -1; } if (m_File.AppendString(FX_BSTRC(" 0 R\r\n")) < 0) { return -1; } if (m_pDocument->m_pInfoDict) { if (m_File.AppendString(FX_BSTRC("/Info ")) < 0) { return -1; } if (m_File.AppendDWord(m_pDocument->m_pInfoDict->GetObjNum()) < 0) { return -1; } if (m_File.AppendString(FX_BSTRC(" 0 R\r\n")) < 0) { return -1; } } } if (m_pEncryptDict) { if (m_File.AppendString(FX_BSTRC("/Encrypt")) < 0) { return -1; } FX_DWORD dwObjNum = m_pEncryptDict->GetObjNum(); if (dwObjNum == 0) { dwObjNum = m_pDocument->GetLastObjNum() + 1; } if (m_File.AppendString(FX_BSTRC(" ")) < 0) { return -1; } if (m_File.AppendDWord(dwObjNum) < 0) { return -1; } if (m_File.AppendString(FX_BSTRC(" 0 R ")) < 0) { return -1; } } if (m_File.AppendString(FX_BSTRC("/Size ")) < 0) { return -1; } if (m_File.AppendDWord(m_dwLastObjNum + (bXRefStream ? 2 : 1)) < 0) { return -1; } if ((m_dwFlags & FPDFCREATE_INCREMENTAL) != 0) { FX_FILESIZE prev = m_pParser->GetLastXRefOffset(); if (prev) { if (m_File.AppendString(FX_BSTRC("/Prev ")) < 0) { return -1; } FX_CHAR offset_buf[20]; FXSYS_memset(offset_buf, 0, sizeof(offset_buf)); FXSYS_i64toa(prev, offset_buf, 10); if (m_File.AppendBlock(offset_buf, FXSYS_strlen(offset_buf)) < 0) { return -1; } } } if (m_pIDArray) { if (m_File.AppendString((FX_BSTRC("/ID"))) < 0) { return -1; } FX_FILESIZE offset = 0; if (PDF_CreatorAppendObject(m_pIDArray, &m_File, offset) < 0) { return -1; } } if (!bXRefStream) { if (m_File.AppendString(FX_BSTRC(">>")) < 0) { return -1; } } else { if (m_File.AppendString(FX_BSTRC("/W[0 4 1]/Index[")) < 0) { return -1; } if ((m_dwFlags & FPDFCREATE_INCREMENTAL) != 0 && m_pParser && m_pParser->GetLastXRefOffset() == 0) { FX_DWORD i = 0; for (i = 0; i < m_dwLastObjNum; i++) { if (!m_ObjectOffset.GetPtrAt(i)) { continue; } if (m_File.AppendDWord(i) < 0) { return -1; } if (m_File.AppendString(FX_BSTRC(" 1 ")) < 0) { return -1; } } if (m_File.AppendString(FX_BSTRC("]/Length ")) < 0) { return -1; } if (m_File.AppendDWord(m_dwLastObjNum * 5) < 0) { return -1; } if (m_File.AppendString(FX_BSTRC(">>stream\r\n")) < 0) { return -1; } for (i = 0; i < m_dwLastObjNum; i++) { FX_FILESIZE* offset = m_ObjectOffset.GetPtrAt(i); if (!offset) { continue; } _OutPutIndex(&m_File, *offset); } } else { int count = m_NewObjNumArray.GetSize(); int32_t i = 0; for (i = 0; i < count; i++) { FX_DWORD objnum = m_NewObjNumArray.ElementAt(i); if (m_File.AppendDWord(objnum) < 0) { return -1; } if (m_File.AppendString(FX_BSTRC(" 1 ")) < 0) { return -1; } } if (m_File.AppendString(FX_BSTRC("]/Length ")) < 0) { return -1; } if (m_File.AppendDWord(count * 5) < 0) { return -1; } if (m_File.AppendString(FX_BSTRC(">>stream\r\n")) < 0) { return -1; } for (i = 0; i < count; i++) { FX_DWORD objnum = m_NewObjNumArray.ElementAt(i); FX_FILESIZE offset = m_ObjectOffset[objnum]; _OutPutIndex(&m_File, offset); } } if (m_File.AppendString(FX_BSTRC("\r\nendstream")) < 0) { return -1; } } } if (m_File.AppendString(FX_BSTRC("\r\nstartxref\r\n")) < 0) { return -1; } FX_CHAR offset_buf[20]; FXSYS_memset(offset_buf, 0, sizeof(offset_buf)); FXSYS_i64toa(m_XrefStart, offset_buf, 10); if (m_File.AppendBlock(offset_buf, FXSYS_strlen(offset_buf)) < 0) { return -1; } if (m_File.AppendString(FX_BSTRC("\r\n%%EOF\r\n")) < 0) { return -1; } m_File.Flush(); return m_iStage = 100; } void CPDF_Creator::Clear() { delete m_pXRefStream; m_pXRefStream = NULL; m_File.Clear(); m_NewObjNumArray.RemoveAll(); if (m_pIDArray) { m_pIDArray->Release(); m_pIDArray = NULL; } } FX_BOOL CPDF_Creator::Create(IFX_StreamWrite* pFile, FX_DWORD flags) { if (!pFile) { return FALSE; } if (!m_File.AttachFile(pFile, FALSE)) { return FALSE; } return Create(flags); } FX_BOOL CPDF_Creator::Create(FX_DWORD flags) { m_dwFlags = flags; m_iStage = 0; m_Offset = 0; m_dwLastObjNum = m_pDocument->GetLastObjNum(); m_ObjectOffset.Clear(); m_ObjectSize.Clear(); m_NewObjNumArray.RemoveAll(); InitID(); if (flags & FPDFCREATE_PROGRESSIVE) { return TRUE; } return Continue(NULL) > -1; } void CPDF_Creator::InitID(FX_BOOL bDefault) { CPDF_Array* pOldIDArray = m_pParser ? m_pParser->GetIDArray() : NULL; FX_BOOL bNewId = !m_pIDArray; if (!m_pIDArray) { FX_DWORD* pBuffer = NULL; m_pIDArray = CPDF_Array::Create(); CPDF_Object* pID1 = pOldIDArray ? pOldIDArray->GetElement(0) : NULL; if (pID1) { m_pIDArray->Add(pID1->Clone()); } else { pBuffer = FX_Alloc(FX_DWORD, 4); PDF_GenerateFileID((FX_DWORD)(uintptr_t) this, m_dwLastObjNum, pBuffer); CFX_ByteStringC bsBuffer((const uint8_t*)pBuffer, 4 * sizeof(FX_DWORD)); m_pIDArray->Add(CPDF_String::Create(bsBuffer, TRUE), m_pDocument); } FX_Free(pBuffer); } if (!bDefault) { return; } if (pOldIDArray) { CPDF_Object* pID2 = pOldIDArray->GetElement(1); if ((m_dwFlags & FPDFCREATE_INCREMENTAL) && m_pEncryptDict && pID2) { m_pIDArray->Add(pID2->Clone()); return; } FX_DWORD* pBuffer = FX_Alloc(FX_DWORD, 4); PDF_GenerateFileID((FX_DWORD)(uintptr_t) this, m_dwLastObjNum, pBuffer); CFX_ByteStringC bsBuffer((const uint8_t*)pBuffer, 4 * sizeof(FX_DWORD)); m_pIDArray->Add(CPDF_String::Create(bsBuffer, TRUE), m_pDocument); FX_Free(pBuffer); return; } m_pIDArray->Add(m_pIDArray->GetElement(0)->Clone()); if (m_pEncryptDict && !pOldIDArray && m_pParser && bNewId) { if (m_pEncryptDict->GetString(FX_BSTRC("Filter")) == FX_BSTRC("Standard")) { CPDF_StandardSecurityHandler handler; CFX_ByteString user_pass = m_pParser->GetPassword(); FX_DWORD flag = PDF_ENCRYPT_CONTENT; handler.OnCreate(m_pEncryptDict, m_pIDArray, (const uint8_t*)user_pass, user_pass.GetLength(), flag); if (m_bNewCrypto) { delete m_pCryptoHandler; } m_pCryptoHandler = new CPDF_StandardCryptoHandler; m_pCryptoHandler->Init(m_pEncryptDict, &handler); m_bNewCrypto = TRUE; m_bSecurityChanged = TRUE; } } } int32_t CPDF_Creator::Continue(IFX_Pause* pPause) { if (m_iStage < 0) { return m_iStage; } int32_t iRet = 0; while (m_iStage < 100) { if (m_iStage < 20) { iRet = WriteDoc_Stage1(pPause); } else if (m_iStage < 30) { iRet = WriteDoc_Stage2(pPause); } else if (m_iStage < 90) { iRet = WriteDoc_Stage3(pPause); } else { iRet = WriteDoc_Stage4(pPause); } if (iRet < m_iStage) { break; } } if (iRet < 1 || m_iStage == 100) { m_iStage = -1; Clear(); return iRet > 99 ? 0 : (iRet < 1 ? -1 : iRet); } return m_iStage; } FX_BOOL CPDF_Creator::SetFileVersion(int32_t fileVersion) { if (fileVersion < 10 || fileVersion > 17) { return FALSE; } m_FileVersion = fileVersion; return TRUE; } void CPDF_Creator::RemoveSecurity() { ResetStandardSecurity(); m_bSecurityChanged = TRUE; m_pEncryptDict = NULL; m_pCryptoHandler = NULL; } void CPDF_Creator::ResetStandardSecurity() { if (m_bStandardSecurity || m_bNewCrypto) { delete m_pCryptoHandler; m_pCryptoHandler = NULL; } m_bNewCrypto = FALSE; if (!m_bStandardSecurity) { return; } if (m_pEncryptDict) { m_pEncryptDict->Release(); m_pEncryptDict = NULL; } m_bStandardSecurity = FALSE; }