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// Copyright (c) 2012 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.
#include "content/common/plugin_list.h"
#include <set>
#include "base/basictypes.h"
#include "base/file_version_info.h"
#include "base/file_version_info_win.h"
#include "base/files/file_util.h"
#include "base/files/memory_mapped_file.h"
#include "base/memory/scoped_ptr.h"
#include "base/path_service.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/win/pe_image.h"
#include "base/win/registry.h"
#include "base/win/scoped_handle.h"
#include "base/win/windows_version.h"
#include "content/common/plugin_constants_win.h"
namespace content {
namespace {
const base::char16 kRegistryApps[] =
L"Software\\Microsoft\\Windows\\CurrentVersion\\App Paths";
const base::char16 kRegistryAcrobat[] = L"Acrobat.exe";
const base::char16 kRegistryAcrobatReader[] = L"AcroRd32.exe";
const base::char16 kRegistryWindowsMedia[] = L"wmplayer.exe";
const base::char16 kRegistryQuickTime[] = L"QuickTimePlayer.exe";
const base::char16 kRegistryPath[] = L"Path";
const base::char16 kRegistryFirefoxInstalled[] =
L"SOFTWARE\\Mozilla\\Mozilla Firefox";
const base::char16 kRegistryJava[] =
L"Software\\JavaSoft\\Java Runtime Environment";
const base::char16 kRegistryBrowserJavaVersion[] = L"BrowserJavaVersion";
const base::char16 kRegistryCurrentJavaVersion[] = L"CurrentVersion";
const base::char16 kRegistryJavaHome[] = L"JavaHome";
const base::char16 kJavaDeploy1[] = L"npdeploytk.dll";
const base::char16 kJavaDeploy2[] = L"npdeployjava1.dll";
base::FilePath AppendPluginsDir(const base::FilePath& path) {
return path.AppendASCII("plugins");
}
// Gets the directory where the application data and libraries exist. This
// may be a versioned subdirectory, or it may be the same directory as the
// GetExeDirectory(), depending on the embedder's implementation.
// Path is an output parameter to receive the path.
void GetAppDirectory(std::set<base::FilePath>* plugin_dirs) {
base::FilePath app_path;
if (!PathService::Get(base::DIR_MODULE, &app_path))
return;
plugin_dirs->insert(AppendPluginsDir(app_path));
}
// Gets the directory where the launching executable resides on disk.
// Path is an output parameter to receive the path.
void GetExeDirectory(std::set<base::FilePath>* plugin_dirs) {
base::FilePath exe_path;
if (!PathService::Get(base::DIR_EXE, &exe_path))
return;
plugin_dirs->insert(AppendPluginsDir(exe_path));
}
// Gets the installed path for a registered app.
bool GetInstalledPath(const base::char16* app, base::FilePath* out) {
base::string16 reg_path(kRegistryApps);
reg_path.append(L"\\");
reg_path.append(app);
base::win::RegKey hkcu_key(HKEY_CURRENT_USER, reg_path.c_str(), KEY_READ);
base::string16 path;
// As of Win7 AppPaths can also be registered in HKCU: http://goo.gl/UgFOf.
if (base::win::GetVersion() >= base::win::VERSION_WIN7 &&
hkcu_key.ReadValue(kRegistryPath, &path) == ERROR_SUCCESS) {
*out = base::FilePath(path);
return true;
} else {
base::win::RegKey hklm_key(HKEY_LOCAL_MACHINE, reg_path.c_str(), KEY_READ);
if (hklm_key.ReadValue(kRegistryPath, &path) == ERROR_SUCCESS) {
*out = base::FilePath(path);
return true;
}
}
return false;
}
// Search the registry at the given path and detect plugin directories.
void GetPluginsInRegistryDirectory(HKEY root_key,
const base::string16& registry_folder,
REGSAM wow64_access,
std::set<base::FilePath>* plugin_dirs) {
for (base::win::RegistryKeyIterator iter(
root_key, registry_folder.c_str(), wow64_access);
iter.Valid();
++iter) {
// Use the registry to gather plugin across the file system.
base::string16 reg_path = registry_folder;
reg_path.append(L"\\");
reg_path.append(iter.Name());
base::win::RegKey key(root_key, reg_path.c_str(), KEY_READ | wow64_access);
base::string16 path;
if (key.ReadValue(kRegistryPath, &path) == ERROR_SUCCESS)
plugin_dirs->insert(base::FilePath(path));
}
}
// Enumerate through the registry key to find all installed FireFox paths.
// FireFox 3 beta and version 2 can coexist. See bug: 1025003
void GetFirefoxInstalledPaths(std::vector<base::FilePath>* out) {
base::win::RegistryKeyIterator it(HKEY_LOCAL_MACHINE,
kRegistryFirefoxInstalled,
KEY_WOW64_32KEY);
for (; it.Valid(); ++it) {
base::string16 full_path = base::string16(kRegistryFirefoxInstalled) +
L"\\" + it.Name() + L"\\Main";
base::win::RegKey key(HKEY_LOCAL_MACHINE, full_path.c_str(), KEY_READ);
base::string16 install_dir;
if (key.ReadValue(L"Install Directory", &install_dir) != ERROR_SUCCESS)
continue;
out->push_back(base::FilePath(install_dir));
}
}
// Get plugin directory locations from the Firefox install path. This is kind
// of a kludge, but it helps us locate the flash player for users that
// already have it for firefox. Not having to download yet-another-plugin
// is a good thing.
void GetFirefoxDirectory(std::set<base::FilePath>* plugin_dirs) {
std::vector<base::FilePath> paths;
GetFirefoxInstalledPaths(&paths);
for (unsigned int i = 0; i < paths.size(); ++i) {
plugin_dirs->insert(AppendPluginsDir(paths[i]));
}
base::FilePath firefox_app_data_plugin_path;
if (PathService::Get(base::DIR_APP_DATA, &firefox_app_data_plugin_path)) {
firefox_app_data_plugin_path =
firefox_app_data_plugin_path.AppendASCII("Mozilla");
plugin_dirs->insert(AppendPluginsDir(firefox_app_data_plugin_path));
}
}
// Hardcoded logic to detect Acrobat plugins locations.
void GetAcrobatDirectory(std::set<base::FilePath>* plugin_dirs) {
base::FilePath path;
if (!GetInstalledPath(kRegistryAcrobatReader, &path) &&
!GetInstalledPath(kRegistryAcrobat, &path)) {
return;
}
plugin_dirs->insert(path.Append(L"Browser"));
}
// Hardcoded logic to detect QuickTime plugin location.
void GetQuicktimeDirectory(std::set<base::FilePath>* plugin_dirs) {
base::FilePath path;
if (GetInstalledPath(kRegistryQuickTime, &path))
plugin_dirs->insert(AppendPluginsDir(path));
}
// Hardcoded logic to detect Windows Media Player plugin location.
void GetWindowsMediaDirectory(std::set<base::FilePath>* plugin_dirs) {
base::FilePath path;
if (GetInstalledPath(kRegistryWindowsMedia, &path))
plugin_dirs->insert(path);
}
// Hardcoded logic to detect Java plugin location.
void GetJavaDirectory(std::set<base::FilePath>* plugin_dirs) {
// Load the new NPAPI Java plugin
// 1. Open the main JRE key under HKLM
base::win::RegKey java_key(HKEY_LOCAL_MACHINE, kRegistryJava,
KEY_QUERY_VALUE);
// 2. Read the current Java version
base::string16 java_version;
if (java_key.ReadValue(kRegistryBrowserJavaVersion, &java_version) !=
ERROR_SUCCESS) {
java_key.ReadValue(kRegistryCurrentJavaVersion, &java_version);
}
if (!java_version.empty()) {
java_key.OpenKey(java_version.c_str(), KEY_QUERY_VALUE);
// 3. Install path of the JRE binaries is specified in "JavaHome"
// value under the Java version key.
base::string16 java_plugin_directory;
if (java_key.ReadValue(kRegistryJavaHome, &java_plugin_directory) ==
ERROR_SUCCESS) {
// 4. The new plugin resides under the 'bin/new_plugin'
// subdirectory.
DCHECK(!java_plugin_directory.empty());
java_plugin_directory.append(L"\\bin\\new_plugin");
// 5. We don't know the exact name of the DLL but it's in the form
// NP*.dll so just invoke LoadPlugins on this path.
plugin_dirs->insert(base::FilePath(java_plugin_directory));
}
}
}
bool IsValid32BitImage(const base::FilePath& path) {
base::MemoryMappedFile plugin_image;
if (!plugin_image.InitializeAsImageSection(path))
return false;
base::win::PEImage image(plugin_image.data());
PIMAGE_NT_HEADERS nt_headers = image.GetNTHeaders();
return (nt_headers->FileHeader.Machine == IMAGE_FILE_MACHINE_I386);
}
// Returns true if the given plugins share at least one mime type. This is used
// to differentiate newer versions of a plugin vs two plugins which happen to
// have the same filename.
bool HaveSharedMimeType(const WebPluginInfo& plugin1,
const WebPluginInfo& plugin2) {
for (size_t i = 0; i < plugin1.mime_types.size(); ++i) {
for (size_t j = 0; j < plugin2.mime_types.size(); ++j) {
if (plugin1.mime_types[i].mime_type == plugin2.mime_types[j].mime_type)
return true;
}
}
return false;
}
// Compares Windows style version strings (i.e. 1,2,3,4). Returns true if b's
// version is newer than a's, or false if it's equal or older.
bool IsNewerVersion(const base::string16& a, const base::string16& b) {
std::vector<base::string16> a_ver = base::SplitString(
a, base::string16(1, ','), base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
std::vector<base::string16> b_ver = base::SplitString(
b, base::string16(1, ','), base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
if (a_ver.size() == 1 && b_ver.size() == 1) {
a_ver = base::SplitString(
a, base::string16(1, '.'), base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
b_ver = base::SplitString(
b, base::string16(1, '.'), base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
}
if (a_ver.size() != b_ver.size())
return false;
for (size_t i = 0; i < a_ver.size(); i++) {
int cur_a, cur_b;
base::StringToInt(a_ver[i], &cur_a);
base::StringToInt(b_ver[i], &cur_b);
if (cur_a > cur_b)
return false;
if (cur_a < cur_b)
return true;
}
return false;
}
} // namespace
bool PluginList::ReadWebPluginInfo(const base::FilePath& filename,
WebPluginInfo* info) {
// On windows, the way we get the mime types for the library is
// to check the version information in the DLL itself. This
// will be a string of the format: <type1>|<type2>|<type3>|...
// For example:
// video/quicktime|audio/aiff|image/jpeg
scoped_ptr<FileVersionInfo> version_info(
FileVersionInfo::CreateFileVersionInfo(filename));
if (!version_info) {
LOG_IF(ERROR, PluginList::DebugPluginLoading())
<< "Could not get version info for plugin "
<< filename.value();
return false;
}
FileVersionInfoWin* version_info_win =
static_cast<FileVersionInfoWin*>(version_info.get());
info->name = version_info->product_name();
info->desc = version_info->file_description();
info->version = version_info->file_version();
info->path = filename;
// TODO(evan): Move the ParseMimeTypes code inline once Pepper is updated.
if (!PluginList::ParseMimeTypes(
base::UTF16ToASCII(version_info_win->GetStringValue(L"MIMEType")),
base::UTF16ToASCII(version_info_win->GetStringValue(L"FileExtents")),
version_info_win->GetStringValue(L"FileOpenName"),
&info->mime_types)) {
LOG_IF(ERROR, PluginList::DebugPluginLoading())
<< "Plugin " << info->name << " has bad MIME types, skipping";
return false;
}
return true;
}
void PluginList::GetPluginDirectories(
std::vector<base::FilePath>* plugin_dirs) {
if (PluginList::plugins_discovery_disabled_)
return;
// We use a set for uniqueness, which we require, over order, which we do not.
std::set<base::FilePath> dirs;
// Load from the application-specific area
GetAppDirectory(&dirs);
// Load from the executable area
GetExeDirectory(&dirs);
// Load Java
GetJavaDirectory(&dirs);
// Load firefox plugins too. This is mainly to try to locate
// a pre-installed Flash player.
GetFirefoxDirectory(&dirs);
// Firefox hard-codes the paths of some popular plugins to ensure that
// the plugins are found. We are going to copy this as well.
GetAcrobatDirectory(&dirs);
GetQuicktimeDirectory(&dirs);
GetWindowsMediaDirectory(&dirs);
for (std::set<base::FilePath>::iterator i = dirs.begin(); i != dirs.end(); ++i)
plugin_dirs->push_back(*i);
}
void PluginList::GetPluginsInDir(
const base::FilePath& path, std::vector<base::FilePath>* plugins) {
WIN32_FIND_DATA find_file_data;
HANDLE find_handle;
base::string16 dir = path.value();
// FindFirstFile requires that you specify a wildcard for directories.
dir.append(L"\\NP*.DLL");
find_handle = FindFirstFile(dir.c_str(), &find_file_data);
if (find_handle == INVALID_HANDLE_VALUE)
return;
do {
if (!(find_file_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) {
base::FilePath filename = path.Append(find_file_data.cFileName);
plugins->push_back(filename);
}
} while (FindNextFile(find_handle, &find_file_data) != 0);
DCHECK(GetLastError() == ERROR_NO_MORE_FILES);
FindClose(find_handle);
}
void PluginList::GetPluginPathsFromRegistry(
std::vector<base::FilePath>* plugins) {
if (PluginList::plugins_discovery_disabled_)
return;
std::set<base::FilePath> plugin_dirs;
// Search for plugins from HKCU and HKLM. THis will only find plugins that
// are correctly registered in the correct WOW64 registry hive.
GetPluginsInRegistryDirectory(HKEY_CURRENT_USER,
kRegistryMozillaPlugins,
0,
&plugin_dirs);
GetPluginsInRegistryDirectory(HKEY_LOCAL_MACHINE,
kRegistryMozillaPlugins,
0,
&plugin_dirs);
for (std::set<base::FilePath>::iterator i = plugin_dirs.begin();
i != plugin_dirs.end(); ++i) {
plugins->push_back(*i);
}
}
bool PluginList::ShouldLoadPluginUsingPluginList(
const WebPluginInfo& info,
std::vector<WebPluginInfo>* plugins) {
bool should_check_version = true;
{
base::AutoLock lock(lock_);
should_check_version =
std::find(extra_plugin_paths_.begin(), extra_plugin_paths_.end(),
info.path) == extra_plugin_paths_.end();
}
// Version check for plugins that are not coming from |extra_plugin_paths_|.
if (should_check_version) {
for (size_t j = 0; j < plugins->size(); ++j) {
base::FilePath::StringType plugin1 =
base::ToLowerASCII((*plugins)[j].path.BaseName().value());
base::FilePath::StringType plugin2 =
base::ToLowerASCII(info.path.BaseName().value());
if ((plugin1 == plugin2 && HaveSharedMimeType((*plugins)[j], info)) ||
(plugin1 == kJavaDeploy1 && plugin2 == kJavaDeploy2) ||
(plugin1 == kJavaDeploy2 && plugin2 == kJavaDeploy1)) {
if (IsNewerVersion(info.version, (*plugins)[j].version))
return false; // We have loaded a plugin whose version is newer.
plugins->erase(plugins->begin() + j);
break;
}
}
}
// The checks below only apply to NPAPI plugins.
if (info.type != WebPluginInfo::PLUGIN_TYPE_NPAPI)
return true;
{
base::AutoLock lock(lock_);
// If the plugin is in our internal list we should load it.
for (size_t i = 0; i < internal_plugins_.size(); ++i) {
if (info.path == internal_plugins_[i].path)
return true;
}
}
// Troublemakers.
base::FilePath::StringType filename =
base::ToLowerASCII(info.path.BaseName().value());
// Depends on XPCOM.
if (filename == kMozillaActiveXPlugin)
return false;
// Disable the Yahoo Application State plugin as it crashes the plugin
// process on return from NPObjectStub::OnInvoke. Please refer to
// http://b/issue?id=1372124 for more information.
if (filename == kYahooApplicationStatePlugin)
return false;
// Disable the WangWang protocol handler plugin (npww.dll) as it crashes
// chrome during shutdown. Firefox also disables this plugin.
// Please refer to http://code.google.com/p/chromium/issues/detail?id=3953
// for more information.
if (filename == kWanWangProtocolHandlerPlugin)
return false;
// We only work with newer versions of the Java plugin which use NPAPI only
// and don't depend on XPCOM.
if (filename == kJavaPlugin1 || filename == kJavaPlugin2) {
std::vector<base::FilePath::StringType> ver = base::SplitString(
info.version, base::FilePath::StringType(1, '.'),
base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
int major, minor, update;
if (ver.size() == 4 &&
base::StringToInt(ver[0], &major) &&
base::StringToInt(ver[1], &minor) &&
base::StringToInt(ver[2], &update)) {
if (major == 6 && minor == 0 && update < 120)
return false; // Java SE6 Update 11 or older.
}
}
// Special WMP handling:
// If both the new and old WMP plugins exist, only load the new one.
if (filename == kNewWMPPlugin) {
for (size_t j = 0; j < plugins->size(); ++j) {
if ((*plugins)[j].path.BaseName().value() == kOldWMPPlugin) {
plugins->erase(plugins->begin() + j);
break;
}
}
} else if (filename == kOldWMPPlugin) {
for (size_t j = 0; j < plugins->size(); ++j) {
if ((*plugins)[j].path.BaseName().value() == kNewWMPPlugin)
return false;
}
}
base::FilePath plugin_path(info.path);
#if defined(ARCH_CPU_X86_64)
// The plugin in question could be a 32 bit plugin which we cannot load.
if (IsValid32BitImage(base::MakeAbsoluteFilePath(plugin_path)))
return false;
#else
// The plugin in question could be a 64 bit plugin which we cannot load.
if (!IsValid32BitImage(base::MakeAbsoluteFilePath(plugin_path)))
return false;
#endif
return true;
}
} // namespace content
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