The Tor Browser: ipc/chromium/src/base/registry.cc@6474c204b198 (annotated)

ipc/chromium/src/base/registry.cc@6474c204b198 (annotated)

ipc/chromium/src/base/registry.cc

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 // All Rights Reserved.
 #include "base/registry.h"
 #include <assert.h>
 #include <shlwapi.h>
 #include <windows.h>
 #pragma comment(lib, "shlwapi.lib")  // for SHDeleteKey
 // local types (see the same declarations in the header file)
 #define tchar TCHAR
 #define CTP const tchar*
 #define tstr std::basic_string<tchar>
 //
 // RegistryValueIterator
 //
 RegistryValueIterator::RegistryValueIterator(HKEY root_key,
                                              LPCTSTR folder_key) {
   LONG result = RegOpenKeyEx(root_key, folder_key, 0, KEY_READ, &key_);
   if (result != ERROR_SUCCESS) {
     key_ = NULL;
   } else {
     DWORD count = 0;
     result = ::RegQueryInfoKey(key_, NULL, 0, NULL, NULL, NULL, NULL, &count,
                                NULL, NULL, NULL, NULL);
     if (result != ERROR_SUCCESS) {
       ::RegCloseKey(key_);
       key_ = NULL;
     } else {
       index_ = count - 1;
     }
   }
   Read();
 }
 RegistryValueIterator::~RegistryValueIterator() {
   if (key_)
     ::RegCloseKey(key_);
 }
 bool RegistryValueIterator::Valid() const {
   // true while the iterator is valid
   return key_ != NULL && index_ >= 0;
 }
 void RegistryValueIterator::operator ++ () {
   // advance to the next entry in the folder
   --index_;
   Read();
 }
 bool RegistryValueIterator::Read() {
   if (Valid()) {
     DWORD ncount = sizeof(name_)/sizeof(*name_);
     value_size_ = sizeof(value_);
     LRESULT r = ::RegEnumValue(key_, index_, name_, &ncount, NULL, &type_,
                                reinterpret_cast<BYTE*>(value_), &value_size_);
     if (ERROR_SUCCESS == r)
       return true;
   }
   name_[0] = '\0';
   value_[0] = '\0';
   value_size_ = 0;
   return false;
 }
 DWORD RegistryValueIterator::ValueCount() const {
   DWORD count = 0;
   HRESULT result = ::RegQueryInfoKey(key_, NULL, 0, NULL, NULL, NULL, NULL,
                                      &count, NULL, NULL, NULL, NULL);
   if (result != ERROR_SUCCESS)
     return 0;
   return count;
 }
 //
 // RegistryKeyIterator
 //
 RegistryKeyIterator::RegistryKeyIterator(HKEY root_key,
                                          LPCTSTR folder_key) {
   LONG result = RegOpenKeyEx(root_key, folder_key, 0, KEY_READ, &key_);
   if (result != ERROR_SUCCESS) {
     key_ = NULL;
   } else {
     DWORD count = 0;
     HRESULT result = ::RegQueryInfoKey(key_, NULL, 0, NULL, &count, NULL, NULL,
                                        NULL, NULL, NULL, NULL, NULL);
     if (result != ERROR_SUCCESS) {
       ::RegCloseKey(key_);
       key_ = NULL;
     } else {
       index_ = count - 1;
     }
   }
   Read();
 }
 RegistryKeyIterator::~RegistryKeyIterator() {
   if (key_)
     ::RegCloseKey(key_);
 }
 bool RegistryKeyIterator::Valid() const {
   // true while the iterator is valid
   return key_ != NULL && index_ >= 0;
 }
 void RegistryKeyIterator::operator ++ () {
   // advance to the next entry in the folder
   --index_;
   Read();
 }
 bool RegistryKeyIterator::Read() {
   if (Valid()) {
     DWORD ncount = sizeof(name_)/sizeof(*name_);
     FILETIME written;
     LRESULT r = ::RegEnumKeyEx(key_, index_, name_, &ncount, NULL, NULL,
                                NULL, &written);
     if (ERROR_SUCCESS == r)
       return true;
   }
   name_[0] = '\0';
   return false;
 }
 DWORD RegistryKeyIterator::SubkeyCount() const {
   DWORD count = 0;
   HRESULT result = ::RegQueryInfoKey(key_, NULL, 0, NULL, &count, NULL, NULL,
                                      NULL, NULL, NULL, NULL, NULL);
   if (result != ERROR_SUCCESS)
     return 0;
   return count;
 }
 //
 // RegKey
 //
 RegKey::RegKey(HKEY rootkey, const tchar* subkey, REGSAM access)
   : key_(NULL), watch_event_(0) {
   if (rootkey) {
     if (access & (KEY_SET_VALUE | KEY_CREATE_SUB_KEY | KEY_CREATE_LINK))
       this->Create(rootkey, subkey, access);
     else
       this->Open(rootkey, subkey, access);
   }
   else assert(!subkey);
 }
 void RegKey::Close() {
   StopWatching();
   if (key_) {
     ::RegCloseKey(key_);
     key_ = NULL;
   }
 }
 bool RegKey::Create(HKEY rootkey, const tchar* subkey, REGSAM access) {
   DWORD disposition_value;
   return CreateWithDisposition(rootkey, subkey, &disposition_value, access);
 }
 bool RegKey::CreateWithDisposition(HKEY rootkey, const tchar* subkey,
                                    DWORD* disposition, REGSAM access) {
   assert(rootkey && subkey && access && disposition);
   this->Close();
   LONG const result = RegCreateKeyEx(rootkey,
                                      subkey,
 ,
                                      NULL,
                                      REG_OPTION_NON_VOLATILE,
                                      access,
                                      NULL,
                                      &key_,
                                      disposition );
   if (result != ERROR_SUCCESS) {
     key_ = NULL;
     return false;
   }
   else return true;
 }
 bool RegKey::Open(HKEY rootkey, const tchar* subkey, REGSAM access) {
   assert(rootkey && subkey && access);
   this->Close();
   LONG const result = RegOpenKeyEx(rootkey, subkey, 0,
                                    access, &key_ );
   if (result != ERROR_SUCCESS) {
     key_ = NULL;
     return false;
   }
   else return true;
 }
 bool RegKey::CreateKey(const tchar* name, REGSAM access) {
   assert(name && access);
   HKEY subkey = NULL;
   LONG const result = RegCreateKeyEx(key_, name, 0, NULL,
                                      REG_OPTION_NON_VOLATILE,
                                      access, NULL, &subkey, NULL);
   this->Close();
   key_ = subkey;
   return (result == ERROR_SUCCESS);
 }
 bool RegKey::OpenKey(const tchar* name, REGSAM access) {
   assert(name && access);
   HKEY subkey = NULL;
   LONG const result = RegOpenKeyEx(key_, name, 0, access, &subkey);
   this->Close();
   key_ = subkey;
   return (result == ERROR_SUCCESS);
 }
 DWORD RegKey::ValueCount() {
   DWORD count = 0;
   HRESULT const result = ::RegQueryInfoKey(key_, NULL, 0, NULL, NULL, NULL,
                                      NULL, &count, NULL, NULL, NULL, NULL);
   return (result != ERROR_SUCCESS) ? 0 : count;
 }
 bool RegKey::ReadName(int index, tstr* name) {
   tchar buf[256];
   DWORD bufsize = sizeof(buf)/sizeof(*buf);
   LRESULT r = ::RegEnumValue(key_, index, buf, &bufsize, NULL, NULL,
                              NULL, NULL);
   if (r != ERROR_SUCCESS)
     return false;
   if (name)
     *name = buf;
   return true;
 }
 bool RegKey::ValueExists(const tchar* name) {
   if (!key_) return false;
   const HRESULT result = RegQueryValueEx(key_, name, 0, NULL, NULL, NULL);
   return (result == ERROR_SUCCESS);
 }
 bool RegKey::ReadValue(const tchar* name, void* data,
                        DWORD* dsize, DWORD* dtype) {
   if (!key_) return false;
   HRESULT const result = RegQueryValueEx(key_, name, 0, dtype,
                                          reinterpret_cast<LPBYTE>(data),
                                          dsize);
   return (result == ERROR_SUCCESS);
 }
 bool RegKey::ReadValue(const tchar* name, tstr * value) {
   assert(value);
   static const size_t kMaxStringLength = 1024;  // This is after expansion.
   // Use the one of the other forms of ReadValue if 1024 is too small for you.
   TCHAR raw_value[kMaxStringLength];
   DWORD type = REG_SZ, size = sizeof(raw_value);
   if (this->ReadValue(name, raw_value, &size, &type)) {
     if (type == REG_SZ) {
       *value = raw_value;
     } else if (type == REG_EXPAND_SZ) {
       TCHAR expanded[kMaxStringLength];
       size = ExpandEnvironmentStrings(raw_value, expanded, kMaxStringLength);
       // Success: returns the number of TCHARs copied
       // Fail: buffer too small, returns the size required
       // Fail: other, returns 0
       if (size == 0 || size > kMaxStringLength)
         return false;
       *value = expanded;
     } else {
       // Not a string. Oops.
       return false;
     }
     return true;
   }
   else return false;
 }
 bool RegKey::ReadValueDW(const tchar* name, DWORD * value) {
   assert(value);
   DWORD type = REG_DWORD, size = sizeof(DWORD), result = 0;
   if (this->ReadValue(name, &result, &size, &type)
      && (type == REG_DWORD || type == REG_BINARY)
      && size == sizeof(DWORD)) {
     *value = result;
     return true;
   }
   else return false;
 }
 bool RegKey::WriteValue(const tchar* name,
                         const void * data,
                         DWORD dsize,
                         DWORD dtype) {
   assert(data);
   if (!key_) return false;
   HRESULT const result = RegSetValueEx(
       key_,
       name,
 ,
       dtype,
       reinterpret_cast<LPBYTE>(const_cast<void*>(data)),
       dsize);
   return (result == ERROR_SUCCESS);
 }
 bool RegKey::WriteValue(const tchar * name, const tchar * value) {
   return this->WriteValue(name, value,
     static_cast<DWORD>(sizeof(*value) * (_tcslen(value) + 1)), REG_SZ);
 }
 bool RegKey::WriteValue(const tchar * name, DWORD value) {
   return this->WriteValue(name, &value,
     static_cast<DWORD>(sizeof(value)), REG_DWORD);
 }
 bool RegKey::DeleteKey(const tchar * name) {
   if (!key_) return false;
   return (ERROR_SUCCESS == SHDeleteKey(key_, name));
 }
 bool RegKey::DeleteValue(const tchar * value_name) {
   assert(value_name);
   HRESULT const result = RegDeleteValue(key_, value_name);
   return (result == ERROR_SUCCESS);
 }
 bool RegKey::StartWatching() {
   if (!watch_event_)
     watch_event_ = CreateEvent(NULL, TRUE, FALSE, NULL);
   DWORD filter = REG_NOTIFY_CHANGE_NAME |
                  REG_NOTIFY_CHANGE_ATTRIBUTES |
                  REG_NOTIFY_CHANGE_LAST_SET |
                  REG_NOTIFY_CHANGE_SECURITY;
   // Watch the registry key for a change of value.
   HRESULT result = RegNotifyChangeKeyValue(key_, TRUE, filter,
                                            watch_event_, TRUE);
   if (SUCCEEDED(result)) {
     return true;
   } else {
     CloseHandle(watch_event_);
     watch_event_ = 0;
     return false;
   }
 }
 bool RegKey::StopWatching() {
   if (watch_event_) {
     CloseHandle(watch_event_);
     watch_event_ = 0;
     return true;
   }
   return false;
 }
 bool RegKey::HasChanged() {
   if (watch_event_) {
     if (WaitForSingleObject(watch_event_, 0) == WAIT_OBJECT_0) {
       StartWatching();
       return true;
     }
   }
   return false;
 }
 // Register a COM object with the most usual properties.
 bool RegisterCOMServer(const tchar* guid,
                        const tchar* name,
                        const tchar* path) {
   RegKey key(HKEY_CLASSES_ROOT, _T("CLSID"), KEY_WRITE);
   key.CreateKey(guid, KEY_WRITE);
   key.WriteValue(NULL, name);
   key.CreateKey(_T("InprocServer32"), KEY_WRITE);
   key.WriteValue(NULL, path);
   key.WriteValue(_T("ThreadingModel"), _T("Apartment"));
   return true;
 }
 bool RegisterCOMServer(const tchar* guid, const tchar* name, HINSTANCE module) {
   tchar module_path[MAX_PATH];
   ::GetModuleFileName(module, module_path, MAX_PATH);
   _tcslwr_s(module_path, MAX_PATH);
   return RegisterCOMServer(guid, name, module_path);
 }
 bool UnregisterCOMServer(const tchar* guid) {
   RegKey key(HKEY_CLASSES_ROOT, _T("CLSID"), KEY_WRITE);
   key.DeleteKey(guid);
   return true;
 }

The Tor Browser / annotate

ipc/chromium/src/base/registry.cc@6474c204b198 (annotated)

ipc/chromium/src/base/registry.cc