| // 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 "fxjs/cjs_globaldata.h" |
| |
| #include <utility> |
| |
| #include "core/fdrm/crypto/fx_crypt.h" |
| #include "third_party/base/ptr_util.h" |
| #include "third_party/base/stl_util.h" |
| |
| #define JS_MAXGLOBALDATA (1024 * 4 - 8) |
| #define SDK_JS_GLOBALDATA_FILENAME L"SDK_JsGlobal.Data" |
| |
| namespace { |
| |
| const uint8_t JS_RC4KEY[] = { |
| 0x19, 0xa8, 0xe8, 0x01, 0xf6, 0xa8, 0xb6, 0x4d, 0x82, 0x04, 0x45, 0x6d, |
| 0xb4, 0xcf, 0xd7, 0x77, 0x67, 0xf9, 0x75, 0x9f, 0xf0, 0xe0, 0x1e, 0x51, |
| 0xee, 0x46, 0xfd, 0x0b, 0xc9, 0x93, 0x25, 0x55, 0x4a, 0xee, 0xe0, 0x16, |
| 0xd0, 0xdf, 0x8c, 0xfa, 0x2a, 0xa9, 0x49, 0xfd, 0x97, 0x1c, 0x0e, 0x22, |
| 0x13, 0x28, 0x7c, 0xaf, 0xc4, 0xfc, 0x9c, 0x12, 0x65, 0x8c, 0x4e, 0x5b, |
| 0x04, 0x75, 0x89, 0xc9, 0xb1, 0xed, 0x50, 0xca, 0x96, 0x6f, 0x1a, 0x7a, |
| 0xfe, 0x58, 0x5d, 0xec, 0x19, 0x4a, 0xf6, 0x35, 0x6a, 0x97, 0x14, 0x00, |
| 0x0e, 0xd0, 0x6b, 0xbb, 0xd5, 0x75, 0x55, 0x8b, 0x6e, 0x6b, 0x19, 0xa0, |
| 0xf8, 0x77, 0xd5, 0xa3}; |
| |
| // Returns true if non-empty, setting sPropName |
| bool TrimPropName(ByteString* sPropName) { |
| sPropName->Trim(); |
| return sPropName->GetLength() != 0; |
| } |
| |
| CJS_GlobalData* g_pInstance = nullptr; |
| |
| } // namespace |
| |
| // static |
| CJS_GlobalData* CJS_GlobalData::GetRetainedInstance( |
| CPDFSDK_FormFillEnvironment* pApp) { |
| if (!g_pInstance) { |
| g_pInstance = new CJS_GlobalData(); |
| } |
| ++g_pInstance->m_RefCount; |
| return g_pInstance; |
| } |
| |
| void CJS_GlobalData::Release() { |
| if (!--m_RefCount) { |
| delete g_pInstance; |
| g_pInstance = nullptr; |
| } |
| } |
| |
| CJS_GlobalData::CJS_GlobalData() |
| : m_RefCount(0), m_sFilePath(SDK_JS_GLOBALDATA_FILENAME) { |
| LoadGlobalPersistentVariables(); |
| } |
| |
| CJS_GlobalData::~CJS_GlobalData() { |
| SaveGlobalPersisitentVariables(); |
| } |
| |
| CJS_GlobalData::iterator CJS_GlobalData::FindGlobalVariable( |
| const ByteString& propname) { |
| for (auto it = m_arrayGlobalData.begin(); it != m_arrayGlobalData.end(); |
| ++it) { |
| if ((*it)->data.sKey == propname) |
| return it; |
| } |
| return m_arrayGlobalData.end(); |
| } |
| |
| CJS_GlobalData::const_iterator CJS_GlobalData::FindGlobalVariable( |
| const ByteString& propname) const { |
| for (auto it = m_arrayGlobalData.begin(); it != m_arrayGlobalData.end(); |
| ++it) { |
| if ((*it)->data.sKey == propname) |
| return it; |
| } |
| return m_arrayGlobalData.end(); |
| } |
| |
| CJS_GlobalData_Element* CJS_GlobalData::GetGlobalVariable( |
| const ByteString& propname) { |
| auto iter = FindGlobalVariable(propname); |
| return iter != m_arrayGlobalData.end() ? iter->get() : nullptr; |
| } |
| |
| void CJS_GlobalData::SetGlobalVariableNumber(ByteString sPropName, |
| double dData) { |
| if (!TrimPropName(&sPropName)) |
| return; |
| |
| if (CJS_GlobalData_Element* pData = GetGlobalVariable(sPropName)) { |
| pData->data.nType = JS_GlobalDataType::NUMBER; |
| pData->data.dData = dData; |
| return; |
| } |
| auto pNewData = pdfium::MakeUnique<CJS_GlobalData_Element>(); |
| pNewData->data.sKey = std::move(sPropName); |
| pNewData->data.nType = JS_GlobalDataType::NUMBER; |
| pNewData->data.dData = dData; |
| m_arrayGlobalData.push_back(std::move(pNewData)); |
| } |
| |
| void CJS_GlobalData::SetGlobalVariableBoolean(ByteString sPropName, |
| bool bData) { |
| if (!TrimPropName(&sPropName)) |
| return; |
| |
| if (CJS_GlobalData_Element* pData = GetGlobalVariable(sPropName)) { |
| pData->data.nType = JS_GlobalDataType::BOOLEAN; |
| pData->data.bData = bData; |
| return; |
| } |
| auto pNewData = pdfium::MakeUnique<CJS_GlobalData_Element>(); |
| pNewData->data.sKey = std::move(sPropName); |
| pNewData->data.nType = JS_GlobalDataType::BOOLEAN; |
| pNewData->data.bData = bData; |
| m_arrayGlobalData.push_back(std::move(pNewData)); |
| } |
| |
| void CJS_GlobalData::SetGlobalVariableString(ByteString sPropName, |
| const ByteString& sData) { |
| if (!TrimPropName(&sPropName)) |
| return; |
| |
| if (CJS_GlobalData_Element* pData = GetGlobalVariable(sPropName)) { |
| pData->data.nType = JS_GlobalDataType::STRING; |
| pData->data.sData = sData; |
| return; |
| } |
| auto pNewData = pdfium::MakeUnique<CJS_GlobalData_Element>(); |
| pNewData->data.sKey = std::move(sPropName); |
| pNewData->data.nType = JS_GlobalDataType::STRING; |
| pNewData->data.sData = sData; |
| m_arrayGlobalData.push_back(std::move(pNewData)); |
| } |
| |
| void CJS_GlobalData::SetGlobalVariableObject( |
| ByteString sPropName, |
| const CJS_GlobalVariableArray& array) { |
| if (!TrimPropName(&sPropName)) |
| return; |
| |
| if (CJS_GlobalData_Element* pData = GetGlobalVariable(sPropName)) { |
| pData->data.nType = JS_GlobalDataType::OBJECT; |
| pData->data.objData = array; |
| return; |
| } |
| auto pNewData = pdfium::MakeUnique<CJS_GlobalData_Element>(); |
| pNewData->data.sKey = std::move(sPropName); |
| pNewData->data.nType = JS_GlobalDataType::OBJECT; |
| pNewData->data.objData = array; |
| m_arrayGlobalData.push_back(std::move(pNewData)); |
| } |
| |
| void CJS_GlobalData::SetGlobalVariableNull(ByteString sPropName) { |
| if (!TrimPropName(&sPropName)) |
| return; |
| |
| if (CJS_GlobalData_Element* pData = GetGlobalVariable(sPropName)) { |
| pData->data.nType = JS_GlobalDataType::NULLOBJ; |
| return; |
| } |
| auto pNewData = pdfium::MakeUnique<CJS_GlobalData_Element>(); |
| pNewData->data.sKey = std::move(sPropName); |
| pNewData->data.nType = JS_GlobalDataType::NULLOBJ; |
| m_arrayGlobalData.push_back(std::move(pNewData)); |
| } |
| |
| bool CJS_GlobalData::SetGlobalVariablePersistent(ByteString sPropName, |
| bool bPersistent) { |
| if (!TrimPropName(&sPropName)) |
| return false; |
| |
| CJS_GlobalData_Element* pData = GetGlobalVariable(sPropName); |
| if (!pData) |
| return false; |
| |
| pData->bPersistent = bPersistent; |
| return true; |
| } |
| |
| bool CJS_GlobalData::DeleteGlobalVariable(ByteString sPropName) { |
| if (!TrimPropName(&sPropName)) |
| return false; |
| |
| auto iter = FindGlobalVariable(sPropName); |
| if (iter == m_arrayGlobalData.end()) |
| return false; |
| |
| m_arrayGlobalData.erase(iter); |
| return true; |
| } |
| |
| int32_t CJS_GlobalData::GetSize() const { |
| return pdfium::CollectionSize<int32_t>(m_arrayGlobalData); |
| } |
| |
| CJS_GlobalData_Element* CJS_GlobalData::GetAt(int index) const { |
| if (index < 0 || index >= GetSize()) |
| return nullptr; |
| return m_arrayGlobalData[index].get(); |
| } |
| |
| void CJS_GlobalData::LoadGlobalPersistentVariables() { |
| uint8_t* pBuffer = nullptr; |
| int32_t nLength = 0; |
| |
| LoadFileBuffer(m_sFilePath.c_str(), pBuffer, nLength); |
| CRYPT_ArcFourCryptBlock(pBuffer, nLength, JS_RC4KEY, sizeof(JS_RC4KEY)); |
| |
| if (pBuffer) { |
| uint8_t* p = pBuffer; |
| uint16_t wType = *((uint16_t*)p); |
| p += sizeof(uint16_t); |
| |
| if (wType == (uint16_t)(('X' << 8) | 'F')) { |
| uint16_t wVersion = *((uint16_t*)p); |
| p += sizeof(uint16_t); |
| |
| ASSERT(wVersion <= 2); |
| |
| uint32_t dwCount = *((uint32_t*)p); |
| p += sizeof(uint32_t); |
| |
| uint32_t dwSize = *((uint32_t*)p); |
| p += sizeof(uint32_t); |
| |
| if (dwSize == nLength - sizeof(uint16_t) * 2 - sizeof(uint32_t) * 2) { |
| for (int32_t i = 0, sz = dwCount; i < sz; i++) { |
| if (p > pBuffer + nLength) |
| break; |
| |
| uint32_t dwNameLen = *((uint32_t*)p); |
| p += sizeof(uint32_t); |
| |
| if (p + dwNameLen > pBuffer + nLength) |
| break; |
| |
| ByteString sEntry = ByteString(p, dwNameLen); |
| p += sizeof(char) * dwNameLen; |
| |
| JS_GlobalDataType wDataType = |
| static_cast<JS_GlobalDataType>(*((uint16_t*)p)); |
| p += sizeof(uint16_t); |
| |
| switch (wDataType) { |
| case JS_GlobalDataType::NUMBER: { |
| double dData = 0; |
| switch (wVersion) { |
| case 1: { |
| uint32_t dwData = *((uint32_t*)p); |
| p += sizeof(uint32_t); |
| dData = dwData; |
| } break; |
| case 2: { |
| dData = *((double*)p); |
| p += sizeof(double); |
| } break; |
| } |
| SetGlobalVariableNumber(sEntry, dData); |
| SetGlobalVariablePersistent(sEntry, true); |
| } break; |
| case JS_GlobalDataType::BOOLEAN: { |
| uint16_t wData = *((uint16_t*)p); |
| p += sizeof(uint16_t); |
| SetGlobalVariableBoolean(sEntry, (bool)(wData == 1)); |
| SetGlobalVariablePersistent(sEntry, true); |
| } break; |
| case JS_GlobalDataType::STRING: { |
| uint32_t dwLength = *((uint32_t*)p); |
| p += sizeof(uint32_t); |
| |
| if (p + dwLength > pBuffer + nLength) |
| break; |
| |
| SetGlobalVariableString(sEntry, ByteString(p, dwLength)); |
| SetGlobalVariablePersistent(sEntry, true); |
| p += sizeof(char) * dwLength; |
| } break; |
| case JS_GlobalDataType::NULLOBJ: { |
| SetGlobalVariableNull(sEntry); |
| SetGlobalVariablePersistent(sEntry, true); |
| } break; |
| case JS_GlobalDataType::OBJECT: |
| break; |
| } |
| } |
| } |
| } |
| FX_Free(pBuffer); |
| } |
| } |
| |
| void CJS_GlobalData::SaveGlobalPersisitentVariables() { |
| uint32_t nCount = 0; |
| CFX_BinaryBuf sData; |
| for (const auto& pElement : m_arrayGlobalData) { |
| if (pElement->bPersistent) { |
| CFX_BinaryBuf sElement; |
| MakeByteString(pElement->data.sKey, &pElement->data, sElement); |
| if (sData.GetSize() + sElement.GetSize() > JS_MAXGLOBALDATA) |
| break; |
| |
| sData.AppendBlock(sElement.GetBuffer(), sElement.GetSize()); |
| nCount++; |
| } |
| } |
| |
| CFX_BinaryBuf sFile; |
| uint16_t wType = (uint16_t)(('X' << 8) | 'F'); |
| sFile.AppendBlock(&wType, sizeof(uint16_t)); |
| uint16_t wVersion = 2; |
| sFile.AppendBlock(&wVersion, sizeof(uint16_t)); |
| sFile.AppendBlock(&nCount, sizeof(uint32_t)); |
| uint32_t dwSize = sData.GetSize(); |
| sFile.AppendBlock(&dwSize, sizeof(uint32_t)); |
| |
| sFile.AppendBlock(sData.GetBuffer(), sData.GetSize()); |
| |
| CRYPT_ArcFourCryptBlock(sFile.GetBuffer(), sFile.GetSize(), JS_RC4KEY, |
| sizeof(JS_RC4KEY)); |
| WriteFileBuffer(m_sFilePath.c_str(), |
| reinterpret_cast<char*>(sFile.GetBuffer()), sFile.GetSize()); |
| } |
| |
| void CJS_GlobalData::LoadFileBuffer(const wchar_t* sFilePath, |
| uint8_t*& pBuffer, |
| int32_t& nLength) { |
| // UnSupport. |
| } |
| |
| void CJS_GlobalData::WriteFileBuffer(const wchar_t* sFilePath, |
| const char* pBuffer, |
| int32_t nLength) { |
| // UnSupport. |
| } |
| |
| void CJS_GlobalData::MakeByteString(const ByteString& name, |
| CJS_KeyValue* pData, |
| CFX_BinaryBuf& sData) { |
| switch (pData->nType) { |
| case JS_GlobalDataType::NUMBER: { |
| uint32_t dwNameLen = (uint32_t)name.GetLength(); |
| sData.AppendBlock(&dwNameLen, sizeof(uint32_t)); |
| sData.AppendString(name); |
| sData.AppendBlock(&pData->nType, sizeof(uint16_t)); |
| |
| double dData = pData->dData; |
| sData.AppendBlock(&dData, sizeof(double)); |
| } break; |
| case JS_GlobalDataType::BOOLEAN: { |
| uint32_t dwNameLen = (uint32_t)name.GetLength(); |
| sData.AppendBlock(&dwNameLen, sizeof(uint32_t)); |
| sData.AppendString(name); |
| sData.AppendBlock(&pData->nType, sizeof(uint16_t)); |
| |
| uint16_t wData = (uint16_t)pData->bData; |
| sData.AppendBlock(&wData, sizeof(uint16_t)); |
| } break; |
| case JS_GlobalDataType::STRING: { |
| uint32_t dwNameLen = (uint32_t)name.GetLength(); |
| sData.AppendBlock(&dwNameLen, sizeof(uint32_t)); |
| sData.AppendString(name); |
| sData.AppendBlock(&pData->nType, sizeof(uint16_t)); |
| |
| uint32_t dwDataLen = (uint32_t)pData->sData.GetLength(); |
| sData.AppendBlock(&dwDataLen, sizeof(uint32_t)); |
| sData.AppendString(pData->sData); |
| } break; |
| case JS_GlobalDataType::NULLOBJ: { |
| uint32_t dwNameLen = (uint32_t)name.GetLength(); |
| sData.AppendBlock(&dwNameLen, sizeof(uint32_t)); |
| sData.AppendString(name); |
| sData.AppendBlock(&pData->nType, sizeof(uint32_t)); |
| } break; |
| default: |
| break; |
| } |
| } |
