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-rw-r--r--fxjs/JS_GlobalData.cpp397
1 files changed, 397 insertions, 0 deletions
diff --git a/fxjs/JS_GlobalData.cpp b/fxjs/JS_GlobalData.cpp
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+++ b/fxjs/JS_GlobalData.cpp
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+// 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/JS_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 READER_JS_GLOBALDATA_FILENAME L"Reader_JsGlobal.Data"
+#define PHANTOM_JS_GLOBALDATA_FILENAME L"Phantom_JsGlobal.Data"
+#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->TrimLeft();
+ sPropName->TrimRight();
+ 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(const ByteString& propname,
+ double dData) {
+ ByteString sPropName(propname);
+ 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 = sPropName;
+ pNewData->data.nType = JS_GlobalDataType::NUMBER;
+ pNewData->data.dData = dData;
+ m_arrayGlobalData.push_back(std::move(pNewData));
+}
+
+void CJS_GlobalData::SetGlobalVariableBoolean(const ByteString& propname,
+ bool bData) {
+ ByteString sPropName(propname);
+ 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 = sPropName;
+ pNewData->data.nType = JS_GlobalDataType::BOOLEAN;
+ pNewData->data.bData = bData;
+ m_arrayGlobalData.push_back(std::move(pNewData));
+}
+
+void CJS_GlobalData::SetGlobalVariableString(const ByteString& propname,
+ const ByteString& sData) {
+ ByteString sPropName(propname);
+ 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 = sPropName;
+ pNewData->data.nType = JS_GlobalDataType::STRING;
+ pNewData->data.sData = sData;
+ m_arrayGlobalData.push_back(std::move(pNewData));
+}
+
+void CJS_GlobalData::SetGlobalVariableObject(
+ const ByteString& propname,
+ const CJS_GlobalVariableArray& array) {
+ ByteString sPropName(propname);
+ if (!TrimPropName(&sPropName))
+ return;
+
+ if (CJS_GlobalData_Element* pData = GetGlobalVariable(sPropName)) {
+ pData->data.nType = JS_GlobalDataType::OBJECT;
+ pData->data.objData.Copy(array);
+ return;
+ }
+ auto pNewData = pdfium::MakeUnique<CJS_GlobalData_Element>();
+ pNewData->data.sKey = sPropName;
+ pNewData->data.nType = JS_GlobalDataType::OBJECT;
+ pNewData->data.objData.Copy(array);
+ m_arrayGlobalData.push_back(std::move(pNewData));
+}
+
+void CJS_GlobalData::SetGlobalVariableNull(const ByteString& propname) {
+ ByteString sPropName(propname);
+ 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 = sPropName;
+ pNewData->data.nType = JS_GlobalDataType::NULLOBJ;
+ m_arrayGlobalData.push_back(std::move(pNewData));
+}
+
+bool CJS_GlobalData::SetGlobalVariablePersistent(const ByteString& propname,
+ bool bPersistent) {
+ ByteString sPropName(propname);
+ if (!TrimPropName(&sPropName))
+ return false;
+
+ CJS_GlobalData_Element* pData = GetGlobalVariable(sPropName);
+ if (!pData)
+ return false;
+
+ pData->bPersistent = bPersistent;
+ return true;
+}
+
+bool CJS_GlobalData::DeleteGlobalVariable(const ByteString& propname) {
+ ByteString sPropName(propname);
+ 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);
+ }
+ 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(), (const 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;
+ }
+}