Add AuthPolicyLoginHelper

chromeos/login/auth/authpolicy_login_helper.cc

+// Copyright 2017 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 "chromeos/login/auth/authpolicy_login_helper.h"
+
+#include "base/files/file_util.h"
+#include "base/task_scheduler/post_task.h"
+#include "chromeos/dbus/auth_policy_client.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/dbus/upstart_client.h"
+
+namespace chromeos {
+namespace {
+
+base::ScopedFD GetDataReadPipe(const std::string& data) {
+  int pipe_fds[2];
+  if (!base::CreateLocalNonBlockingPipe(pipe_fds)) {
+    DLOG(ERROR) << "Failed to create pipe";
+    return base::ScopedFD();
+  }
+  base::ScopedFD pipe_read_end(pipe_fds[0]);
+  base::ScopedFD pipe_write_end(pipe_fds[1]);
+
+  if (!base::WriteFileDescriptor(pipe_write_end.get(), data.c_str(),
+                                 data.size())) {
+    DLOG(ERROR) << "Failed to write to pipe";
+    return base::ScopedFD();
+  }
+  return pipe_read_end;
+}
+
+}  // namespace
+
+AuthPolicyLoginHelper::AuthPolicyLoginHelper() : weak_factory_(this) {}
+
+void AuthPolicyLoginHelper::JoinAdDomain(const std::string& machine_name,
+                                         const std::string& username,
+                                         const std::string& password,
+                                         const JoinCallback& callback) {
+  DCHECK(!weak_factory_.HasWeakPtrs()) << "Another operation is in progress";
+  chromeos::DBusThreadManager::Get()->GetAuthPolicyClient()->JoinAdDomain(
+      machine_name, username, GetDataReadPipe(password).get(),
+      base::Bind(&AuthPolicyLoginHelper::OnJoinCallback,
+                 weak_factory_.GetWeakPtr(), callback));
+}
+
+void AuthPolicyLoginHelper::AuthenticateUser(const std::string& username,
+                                             const std::string& password,
+                                             const AuthCallback& callback) {
+  DCHECK(!weak_factory_.HasWeakPtrs()) << "Another operation is in progress";
+  chromeos::DBusThreadManager::Get()->GetAuthPolicyClient()->AuthenticateUser(
+      username, GetDataReadPipe(password).get(),

[ljusten (tachyonic), 2017/04/04 12:51:32]

I was a bit concerned about this, but seems like it's safe.
http://stackoverflow.com/questions/10006891/stdstringc-str-and-temporaries

[Roman Sorokin (ftl), 2017/04/06 15:00:32]

Acknowledged.

+      base::Bind(&AuthPolicyLoginHelper::OnAuthCallback,
+                 weak_factory_.GetWeakPtr(), callback));
+}
+
+void AuthPolicyLoginHelper::CancelRequestsAndRestart() {

[ljusten (tachyonic), 2017/04/04 12:51:32]

Are you aware of
https://cs.chromium.org/chromium/src/base/cancelable_callback.h?
I was wondering whether you could also use that.

[Roman Sorokin (ftl), 2017/04/06 15:00:32]

I think it would be more complicated.

+  weak_factory_.InvalidateWeakPtrs();
+  chromeos::DBusThreadManager::Get()
+      ->GetUpstartClient()
+      ->RestartAuthPolicyService();
+}
+
+void AuthPolicyLoginHelper::OnJoinCallback(const JoinCallback& callback,
+                                           authpolicy::ErrorType error) {
+  callback.Run(error);
+}
+
+void AuthPolicyLoginHelper::OnAuthCallback(
+    const AuthCallback& callback,
+    authpolicy::ErrorType error,
+    const authpolicy::ActiveDirectoryAccountData& account_data) {
+  callback.Run(error, account_data);
+}
+
+AuthPolicyLoginHelper::~AuthPolicyLoginHelper() {}
+
+}  // namespace chromeos