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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 "chrome/browser/safe_browsing/sandboxed_zip_analyzer.h"
#include <utility>
#include "base/bind.h"
#include "base/command_line.h"
#include "base/files/file_util.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/threading/sequenced_worker_pool.h"
#include "chrome/common/chrome_utility_messages.h"
#include "chrome/common/safe_browsing/zip_analyzer_results.h"
#include "chrome/grit/generated_resources.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/child_process_data.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/common/content_switches.h"
#include "ipc/ipc_message_macros.h"
#include "ipc/ipc_platform_file.h"
#include "ui/base/l10n/l10n_util.h"
using content::BrowserThread;
namespace safe_browsing {
SandboxedZipAnalyzer::SandboxedZipAnalyzer(
const base::FilePath& zip_file,
const ResultCallback& result_callback)
: zip_file_name_(zip_file),
callback_(result_callback),
callback_called_(false) {
}
void SandboxedZipAnalyzer::Start() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
// Starting the analyzer will block on opening the zip file, so run this
// on a worker thread. The task does not need to block shutdown.
if (!BrowserThread::GetBlockingPool()->PostWorkerTaskWithShutdownBehavior(
FROM_HERE,
base::Bind(&SandboxedZipAnalyzer::AnalyzeInSandbox, this),
base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN)) {
NOTREACHED();
}
}
SandboxedZipAnalyzer::~SandboxedZipAnalyzer() {
// If we're using UtilityProcessHost, we may not be destroyed on
// the UI or IO thread.
CloseTemporaryFile();
}
void SandboxedZipAnalyzer::CloseTemporaryFile() {
if (!temp_file_.IsValid())
return;
// Close the temporary file in the blocking pool since doing so will delete
// the file.
if (!BrowserThread::GetBlockingPool()->PostWorkerTaskWithShutdownBehavior(
FROM_HERE,
base::Bind(&base::File::Close,
base::Owned(new base::File(std::move(temp_file_)))),
base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN)) {
NOTREACHED();
}
}
void SandboxedZipAnalyzer::AnalyzeInSandbox() {
// This zip file will be closed on the IO thread once it has been handed
// off to the child process.
zip_file_.Initialize(zip_file_name_,
base::File::FLAG_OPEN | base::File::FLAG_READ);
if (!zip_file_.IsValid()) {
DVLOG(1) << "Could not open zip file: " << zip_file_name_.value();
if (!BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(&SandboxedZipAnalyzer::OnAnalyzeZipFileFinished, this,
zip_analyzer::Results()))) {
NOTREACHED();
}
return;
}
// This temp file will be closed in the blocking pool when results from the
// analyzer return.
base::FilePath temp_path;
if (base::CreateTemporaryFile(&temp_path)) {
temp_file_.Initialize(temp_path, (base::File::FLAG_CREATE_ALWAYS |
base::File::FLAG_READ |
base::File::FLAG_WRITE |
base::File::FLAG_TEMPORARY |
base::File::FLAG_DELETE_ON_CLOSE));
}
DVLOG_IF(1, !temp_file_.IsValid())
<< "Could not open temporary output file: " << temp_path.value();
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(&SandboxedZipAnalyzer::StartProcessOnIOThread, this));
}
void SandboxedZipAnalyzer::OnProcessCrashed(int exit_code) {
OnAnalyzeZipFileFinished(zip_analyzer::Results());
}
void SandboxedZipAnalyzer::OnProcessLaunchFailed() {
OnAnalyzeZipFileFinished(zip_analyzer::Results());
}
bool SandboxedZipAnalyzer::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(SandboxedZipAnalyzer, message)
IPC_MESSAGE_HANDLER(ChromeUtilityHostMsg_ProcessStarted,
OnUtilityProcessStarted)
IPC_MESSAGE_HANDLER(
ChromeUtilityHostMsg_AnalyzeZipFileForDownloadProtection_Finished,
OnAnalyzeZipFileFinished)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void SandboxedZipAnalyzer::StartProcessOnIOThread() {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
utility_process_host_ = content::UtilityProcessHost::Create(
this,
BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO).get())
->AsWeakPtr();
utility_process_host_->SetName(l10n_util::GetStringUTF16(
IDS_UTILITY_PROCESS_SAFE_BROWSING_ZIP_FILE_ANALYZER_NAME));
utility_process_host_->Send(new ChromeUtilityMsg_StartupPing);
// Wait for the startup notification before sending the main IPC to the
// utility process, so that we can dup the file handle.
}
void SandboxedZipAnalyzer::OnUtilityProcessStarted() {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
base::ProcessHandle utility_process =
content::RenderProcessHost::run_renderer_in_process() ?
base::GetCurrentProcessHandle() :
utility_process_host_->GetData().handle;
if (utility_process == base::kNullProcessHandle) {
DLOG(ERROR) << "Child process handle is null";
}
utility_process_host_->Send(
new ChromeUtilityMsg_AnalyzeZipFileForDownloadProtection(
IPC::TakeFileHandleForProcess(std::move(zip_file_), utility_process),
IPC::GetFileHandleForProcess(temp_file_.GetPlatformFile(),
utility_process,
false /* !close_source_handle */)));
}
void SandboxedZipAnalyzer::OnAnalyzeZipFileFinished(
const zip_analyzer::Results& results) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
if (callback_called_)
return;
BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
base::Bind(callback_, results));
callback_called_ = true;
CloseTemporaryFile();
}
} // namespace safe_browsing
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