Get enrollment token from DMServer when an Active Directory user uses ARC

chrome/browser/chromeos/arc/auth/arc_active_directory_enrollment_token_fetcher_browsertest.cc

Index: chrome/browser/chromeos/arc/auth/arc_active_directory_enrollment_token_fetcher_browsertest.cc
diff --git a/chrome/browser/chromeos/arc/auth/arc_active_directory_enrollment_token_fetcher_browsertest.cc b/chrome/browser/chromeos/arc/auth/arc_active_directory_enrollment_token_fetcher_browsertest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..ce952cf05e981767ced2a49fdac827349f0da0cf
--- /dev/null
+++ b/chrome/browser/chromeos/arc/auth/arc_active_directory_enrollment_token_fetcher_browsertest.cc
@@ -0,0 +1,232 @@
+// 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 <memory>
+#include <string>
+
+#include "base/bind.h"
+#include "base/callback.h"
+#include "base/command_line.h"
+#include "base/memory/ptr_util.h"
+#include "base/run_loop.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/chromeos/arc/arc_auth_service.h"
+#include "chrome/browser/chromeos/arc/arc_session_manager.h"
+#include "chrome/browser/chromeos/arc/auth/arc_active_directory_enrollment_token_fetcher.h"
+#include "chrome/browser/chromeos/login/users/fake_chrome_user_manager.h"
+#include "chrome/browser/chromeos/login/users/scoped_user_manager_enabler.h"
+#include "chrome/browser/chromeos/policy/dm_token_storage.h"
+#include "chrome/browser/policy/cloud/test_request_interceptor.h"
+#include "chrome/test/base/in_process_browser_test.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/dbus/fake_cryptohome_client.h"
+#include "components/arc/arc_util.h"
+#include "components/policy/core/common/cloud/device_management_service.h"
+#include "components/policy/core/common/policy_switches.h"
+#include "content/public/browser/browser_thread.h"
+#include "net/base/network_delegate.h"
+#include "net/base/upload_bytes_element_reader.h"
+#include "net/base/upload_data_stream.h"
+#include "net/base/url_util.h"
+#include "net/http/http_request_headers.h"
+#include "net/url_request/url_request.h"
+#include "net/url_request/url_request_test_job.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+constexpr char kFakeDmToken[] = "fake-dm-token";
+constexpr char kFakeEnrollmentToken[] = "fake-enrollment-token";
+constexpr char kFakeGuid[] = "f04557de-5da2-40ce-ae9d-b8874d8da96e";
+
+// JobCallback for the interceptor.
+net::URLRequestJob* ResponseJob(net::URLRequest* request,
+                                net::NetworkDelegate* network_delegate) {
+  // Check the operation.
+  std::string request_type;
+  EXPECT_TRUE(
+      net::GetValueForKeyInQuery(request->url(), "request", &request_type));
+  EXPECT_EQ("active_directory_enroll_play_user", request_type);
+
+  // Check content of request.
+  const net::UploadDataStream* upload = request->get_upload();
+  EXPECT_TRUE(upload);
+  EXPECT_TRUE(upload->GetElementReaders());
+  EXPECT_EQ(1u, upload->GetElementReaders()->size());
+  EXPECT_TRUE((*upload->GetElementReaders())[0]->AsBytesReader());
+
+  const net::UploadBytesElementReader* bytes_reader =
+      (*upload->GetElementReaders())[0]->AsBytesReader();
+
+  enterprise_management::DeviceManagementRequest parsed_request;
+  EXPECT_TRUE(parsed_request.ParseFromArray(bytes_reader->bytes(),
+                                            bytes_reader->length()));
+  EXPECT_TRUE(parsed_request.has_active_directory_enroll_play_user_request());
+
+  // Check the DMToken.
+  net::HttpRequestHeaders request_headers = request->extra_request_headers();
+  std::string value;
+  EXPECT_TRUE(request_headers.GetHeader("Authorization", &value));
+  EXPECT_EQ("GoogleDMToken token=" + std::string(kFakeDmToken), value);
+
+  // Response contains the enrollment token.
+  enterprise_management::DeviceManagementResponse response;
+  response.mutable_active_directory_enroll_play_user_response()
+      ->set_enrollment_token(kFakeEnrollmentToken);
+  std::string response_data;
+  EXPECT_TRUE(response.SerializeToString(&response_data));
+
+  return new net::URLRequestTestJob(request, network_delegate,
+                                    net::URLRequestTestJob::test_headers(),
+                                    response_data, true);
+}
+
+class ArcActiveDirectoryEnrollmentTokenFetcherBrowserTest
+    : public InProcessBrowserTest {
+ protected:
+  ArcActiveDirectoryEnrollmentTokenFetcherBrowserTest() = default;
+  ~ArcActiveDirectoryEnrollmentTokenFetcherBrowserTest() override = default;
+
+  void SetUpCommandLine(base::CommandLine* command_line) override {
+    InProcessBrowserTest::SetUpCommandLine(command_line);
+    command_line->AppendSwitchASCII(policy::switches::kDeviceManagementUrl,
+                                    "http://localhost");
+    arc::SetArcAvailableCommandLineForTesting(command_line);
+  }
+
+  void SetUpInProcessBrowserTestFixture() override {
+    // Set fake cryptohome, because we want to fail DMToken retrieval
+    auto cryptohome_client = base::MakeUnique<chromeos::FakeCryptohomeClient>();
+    fake_cryptohome_client_ = cryptohome_client.get();
+    chromeos::DBusThreadManager::GetSetterForTesting()->SetCryptohomeClient(
+        std::move(cryptohome_client));
+  }
+
+  void SetUpOnMainThread() override {
+    interceptor_ = base::MakeUnique<policy::TestRequestInterceptor>(
+        "localhost", content::BrowserThread::GetTaskRunnerForThread(
+                         content::BrowserThread::IO));
+
+    user_manager_enabler_ =
+        base::MakeUnique<chromeos::ScopedUserManagerEnabler>(
+            new chromeos::FakeChromeUserManager());
+
+    const AccountId account_id(AccountId::AdFromObjGuid(kFakeGuid));
+    GetFakeUserManager()->LoginUser(account_id);
+  }
+
+  void StoreCorrectDmToken() {
+    fake_cryptohome_client_->set_system_salt(
+        chromeos::FakeCryptohomeClient::GetStubSystemSalt());
+    fake_cryptohome_client_->SetServiceIsAvailable(true);
+    // Store a fake DM token.
+    base::RunLoop run_loop;
+    auto dm_token_storage = base::MakeUnique<policy::DMTokenStorage>(
+        g_browser_process->local_state());
+    dm_token_storage->StoreDMToken(
+        kFakeDmToken, base::Bind(
+                          [](base::RunLoop* run_loop, bool success) {
+                            EXPECT_TRUE(success);
+                            run_loop->Quit();
+                          },
+                          &run_loop));
+    // Because the StoreDMToken() operation interacts with the I/O thread,
+    // RunUntilIdle() won't work here. Instead, use Run() and Quit() explicitly
+    // in the callback.
+    run_loop.Run();
+  }
+
+  void FailDmToken() {
+    fake_cryptohome_client_->set_system_salt(std::vector<uint8_t>());
+    fake_cryptohome_client_->SetServiceIsAvailable(true);
+  }
+
+  void TearDownOnMainThread() override {
+    user_manager_enabler_.reset();
+    interceptor_.reset();
+  }
+
+  chromeos::FakeChromeUserManager* GetFakeUserManager() const {
+    return static_cast<chromeos::FakeChromeUserManager*>(
+        user_manager::UserManager::Get());
+  }
+
+  policy::TestRequestInterceptor* interceptor() { return interceptor_.get(); }
+
+  static void FetchEnrollmentToken(
+      arc::ArcActiveDirectoryEnrollmentTokenFetcher* fetcher,
+      std::string* output_enrollment_token) {
+    base::RunLoop run_loop;
+    fetcher->Fetch(base::Bind(
+        [](std::string* output_enrollment_token, base::RunLoop* run_loop,
+           const std::string& enrollment_token) {
+          *output_enrollment_token = enrollment_token;
+          run_loop->Quit();
+        },
+        output_enrollment_token, &run_loop));
+    // Because the Fetch() operation needs to interact with other threads,
+    // RunUntilIdle() won't work here. Instead, use Run() and Quit() explicitly
+    // in the callback.
+    run_loop.Run();
+  }
+
+ private:
+  std::unique_ptr<policy::TestRequestInterceptor> interceptor_;
+  std::unique_ptr<chromeos::ScopedUserManagerEnabler> user_manager_enabler_;
+  // DBusThreadManager owns this.
+  chromeos::FakeCryptohomeClient* fake_cryptohome_client_;
+
+  DISALLOW_COPY_AND_ASSIGN(ArcActiveDirectoryEnrollmentTokenFetcherBrowserTest);
+};
+
+IN_PROC_BROWSER_TEST_F(ArcActiveDirectoryEnrollmentTokenFetcherBrowserTest,
+                       RequestAccountInfoSuccess) {
+  interceptor()->PushJobCallback(base::Bind(&ResponseJob));
+
+  // Retrieving the DM token will succeed.
+  StoreCorrectDmToken();
+
+  std::string enrollment_token;
+  auto token_fetcher =
+      base::MakeUnique<arc::ArcActiveDirectoryEnrollmentTokenFetcher>();
+  FetchEnrollmentToken(token_fetcher.get(), &enrollment_token);
+  EXPECT_EQ(kFakeEnrollmentToken, enrollment_token);
+}
+
+IN_PROC_BROWSER_TEST_F(ArcActiveDirectoryEnrollmentTokenFetcherBrowserTest,
+                       DmTokenRetrievalFailed) {
+  interceptor()->PushJobCallback(base::Bind(
+      [](net::URLRequest*, net::NetworkDelegate*) -> net::URLRequestJob* {
+        ADD_FAILURE() << "DMServer called when not expected";
+        return nullptr;
+      }));
+
+  // Retrieving the DM token will fail.
+  FailDmToken();
+
+  // We expect enrollment_token is empty in this case. So initialize with
+  // non-empty value.
+  std::string enrollment_token = "NOT-YET-FETCHED";
+  auto token_fetcher =
+      base::MakeUnique<arc::ArcActiveDirectoryEnrollmentTokenFetcher>();
+  FetchEnrollmentToken(token_fetcher.get(), &enrollment_token);
+
+  EXPECT_EQ(std::string(), enrollment_token);
+}
+
+IN_PROC_BROWSER_TEST_F(ArcActiveDirectoryEnrollmentTokenFetcherBrowserTest,
+                       RequestAccountInfoError) {
+  interceptor()->PushJobCallback(
+      policy::TestRequestInterceptor::BadRequestJob());
+
+  // Retrieving the DM token will succeed.
+  StoreCorrectDmToken();
+
+  // We expect enrollment_token is empty in this case. So initialize with
+  // non-empty value.
+  std::string enrollment_token = "NOT-YET-FETCHED";
+  auto token_fetcher =
+      base::MakeUnique<arc::ArcActiveDirectoryEnrollmentTokenFetcher>();
+  FetchEnrollmentToken(token_fetcher.get(), &enrollment_token);
+
+  EXPECT_EQ(std::string(), enrollment_token);
+}