From f781782dd67077478e117c61dca4ea5eefce3544 Mon Sep 17 00:00:00 2001
From: "slightlyoff@chromium.org"
 <slightlyoff@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>
Date: Thu, 24 Sep 2009 05:11:58 +0000
Subject: Initial import of the Chrome Frame codebase. Integration in
 chrome.gyp coming in a separate CL.

BUG=None
TEST=None

Review URL: http://codereview.chromium.org/218019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@27042 0039d316-1c4b-4281-b951-d872f2087c98
---
 chrome_frame/chrome_launcher.cc | 125 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 chrome_frame/chrome_launcher.cc

(limited to 'chrome_frame/chrome_launcher.cc')

diff --git a/chrome_frame/chrome_launcher.cc b/chrome_frame/chrome_launcher.cc
new file mode 100644
index 0000000..7670aec
--- /dev/null
+++ b/chrome_frame/chrome_launcher.cc
@@ -0,0 +1,125 @@
+// Copyright (c) 2009 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_frame/chrome_launcher.h"
+
+#include "base/base_switches.h"
+#include "base/command_line.h"
+#include "base/file_util.h"
+#include "base/logging.h"
+#include "base/path_service.h"
+#include "chrome/common/chrome_constants.h"
+#include "chrome/common/chrome_switches.h"
+#include "chrome_frame/chrome_frame_automation.h"
+#include "chrome_frame/crash_report.h"
+
+namespace chrome_launcher {
+
+const wchar_t kLauncherExeBaseName[] = L"chrome_launcher.exe";
+
+// These are the switches we will allow (along with their values) in the
+// safe-for-Low-Integrity version of the Chrome command line.
+const wchar_t* kAllowedSwitches[] = {
+  switches::kAutomationClientChannelID,
+  switches::kDisableMetrics,
+  switches::kNoFirstRun,
+  switches::kUserDataDir,
+  switches::kLoadExtension,
+};
+
+CommandLine* CreateLaunchCommandLine() {
+  // TODO(joi) As optimization, could launch Chrome directly when running at
+  // medium integrity.  (Requires bringing in code to read SIDs, etc.)
+
+  // The launcher EXE will be in the same directory as the npchrome_tab DLL,
+  // so create a full path to it based on this assumption.  Since our unit
+  // tests also use this function, and live in the directory above, we test
+  // existence of the file and try the path that includes the /servers/
+  // directory if needed.
+  FilePath module_path;
+  if (PathService::Get(base::FILE_MODULE, &module_path)) {
+    FilePath current_dir = module_path.DirName();
+    FilePath same_dir_path = current_dir.Append(kLauncherExeBaseName);
+    if (file_util::PathExists(same_dir_path)) {
+      return new CommandLine(same_dir_path.ToWStringHack());
+    } else {
+      FilePath servers_path = 
+          current_dir.Append(L"servers").Append(kLauncherExeBaseName);
+      DCHECK(file_util::PathExists(servers_path)) <<
+          "What module is this? It's not in 'servers' or main output dir.";
+      return new CommandLine(servers_path.ToWStringHack());
+    }
+  } else {
+    NOTREACHED();
+    return NULL;
+  }
+}
+
+void SanitizeCommandLine(const CommandLine& original, CommandLine* sanitized) {
+  int num_sanitized_switches = 0;
+  for (int i = 0; i < arraysize(kAllowedSwitches); ++i) {
+    const wchar_t* current_switch = kAllowedSwitches[i];
+    if (original.HasSwitch(current_switch)) {
+      ++num_sanitized_switches;
+      std::wstring switch_value = original.GetSwitchValue(current_switch);
+      if (0 == switch_value.length()) {
+        sanitized->AppendSwitch(current_switch);
+      } else {
+        sanitized->AppendSwitchWithValue(current_switch, switch_value);
+      }
+    }
+  }
+  if (num_sanitized_switches != original.GetSwitchCount()) {
+    NOTREACHED();
+    LOG(ERROR) << "Original command line from Low Integrity had switches "
+        << "that are not on our whitelist.";
+  }
+}
+
+bool SanitizeAndLaunchChrome(const wchar_t* command_line) {
+  std::wstring command_line_with_program(L"dummy.exe ");
+  command_line_with_program += command_line;
+  CommandLine original(L"");
+  original.ParseFromString(command_line_with_program);
+  CommandLine sanitized(GetChromeExecutablePath());
+  SanitizeCommandLine(original, &sanitized);
+
+  return base::LaunchApp(sanitized.command_line_string(), false, false, NULL);
+}
+
+std::wstring GetChromeExecutablePath() {
+  std::wstring cur_path;
+  PathService::Get(base::DIR_MODULE, &cur_path);
+  file_util::AppendToPath(&cur_path, chrome::kBrowserProcessExecutableName);
+
+  // The installation model for Chrome places the DLLs in a versioned
+  // sub-folder one down from the Chrome executable. If we fail to find
+  // chrome.exe in the current path, try looking one up and launching that
+  // instead.
+  if (!file_util::PathExists(cur_path)) {
+    PathService::Get(base::DIR_MODULE, &cur_path);
+    file_util::UpOneDirectory(&cur_path);
+    file_util::AppendToPath(&cur_path, chrome::kBrowserProcessExecutableName);
+  }
+
+  return cur_path;
+}
+
+}  // namespace chrome_launcher
+
+// Entrypoint that implements the logic of chrome_launcher.exe.
+int CALLBACK CfLaunchChrome() {
+  if (chrome_launcher::SanitizeAndLaunchChrome(::GetCommandLine())) {
+    return ERROR_SUCCESS;
+  } else {
+    return ERROR_OPEN_FAILED;
+  }
+}
+
+// Compile-time check to see that the type CfLaunchChromeProc is correct.
+#ifndef NODEBUG
+namespace {
+chrome_launcher::CfLaunchChromeProc cf_launch_chrome = CfLaunchChrome;
+}  // namespace
+#endif  // NODEBUG
-- 
cgit v1.1