arc: Enable silent PlayStore Sign-In.

chrome/browser/chromeos/arc/arc_auth_code_fetcher.cc

+// Copyright 2016 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/chromeos/arc/arc_auth_code_fetcher.h"
+
+#include "base/json/json_string_value_serializer.h"
+#include "base/json/json_writer.h"
+#include "base/values.h"
+#include "chrome/browser/chromeos/arc/arc_auth_code_fetcher_delegate.h"
+#include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
+#include "chrome/browser/signin/signin_manager_factory.h"
+#include "chrome/browser/ui/ash/multi_user/multi_user_util.h"
+#include "components/signin/core/account_id/account_id.h"
+#include "components/signin/core/browser/profile_oauth2_token_service.h"
+#include "components/signin/core/browser/signin_manager_base.h"
+#include "components/user_manager/known_user.h"
+#include "content/public/browser/browser_context.h"
+#include "content/public/common/url_constants.h"
+#include "google_apis/gaia/gaia_auth_fetcher.h"
+#include "google_apis/gaia/gaia_constants.h"
+#include "net/base/load_flags.h"
+#include "net/http/http_status_code.h"
+#include "net/url_request/url_fetcher.h"
+
+namespace arc {
+
+namespace {
+
+constexpr int kGetAuthCodeNetworkRetry = 3;
+
+constexpr char kConsumerName[] = "ArcAuthContext";
+constexpr char kToken[] = "token";
+constexpr char kDeviceId[] = "device_id";
+constexpr char kDeviceType[] = "device_type";
+constexpr char kDeviceTypeArc[] = "arc_plus_plus";
+constexpr char kLoginScopedToken[] = "login_scoped_token";
+constexpr char kGetAuthCodeHeaders[] =
+    "Content-Type: application/json; charset=utf-8";
+constexpr char kContentTypeJSON[] = "application/json";
+
+}  // namespace
+
+ArcAuthCodeFetcher::ArcAuthCodeFetcher(
+    ArcAuthCodeFetcherDelegate* delegate,
+    net::URLRequestContextGetter* request_context_getter,
+    Profile* profile,
+    const std::string& auth_endpoint)
+    : OAuth2TokenService::Consumer(kConsumerName),
+      delegate_(delegate),
+      request_context_getter_(request_context_getter),
+      profile_(profile),
+      auth_endpoint_(auth_endpoint) {
+  // Get token service and account ID to fetch auth tokens.
+  ProfileOAuth2TokenService* const token_service =
+      ProfileOAuth2TokenServiceFactory::GetForProfile(profile_);
+  const SigninManagerBase* const signin_manager =
+      SigninManagerFactory::GetForProfile(profile_);
+  CHECK(token_service && signin_manager);
+  const std::string& account_id = signin_manager->GetAuthenticatedAccountId();
+  DCHECK(!account_id.empty());
+  DCHECK(token_service->RefreshTokenIsAvailable(account_id));
+
+  OAuth2TokenService::ScopeSet scopes;
+  scopes.insert(GaiaConstants::kOAuth1LoginScope);
+  login_token_request_.reset(
+      token_service->StartRequest(account_id, scopes, this).release());
+}
+
+ArcAuthCodeFetcher::~ArcAuthCodeFetcher() {}
+
+void ArcAuthCodeFetcher::OnGetTokenSuccess(
+    const OAuth2TokenService::Request* request,
+    const std::string& access_token,
+    const base::Time& expiration_time) {
+  ResetFetchers();
+
+  const std::string device_id = user_manager::known_user::GetDeviceId(
+      multi_user_util::GetAccountIdFromProfile(profile_));
+  DCHECK(!device_id.empty());
+
+  base::DictionaryValue request_data;
+  request_data.SetString(kLoginScopedToken, access_token);
+  request_data.SetString(kDeviceType, kDeviceTypeArc);
+  request_data.SetString(kDeviceId, device_id);
+  std::string request_string;
+  base::JSONWriter::Write(request_data, &request_string);
+
+  DCHECK(!auth_endpoint_.empty());
+  auth_code_fetcher_ = net::URLFetcher::Create(0, GURL(auth_endpoint_),
+                                               net::URLFetcher::POST, this);
+  auth_code_fetcher_->SetRequestContext(request_context_getter_);
+  auth_code_fetcher_->SetUploadData(kContentTypeJSON, request_string);
+  auth_code_fetcher_->SetLoadFlags(net::LOAD_DISABLE_CACHE |
+                                   net::LOAD_BYPASS_CACHE);
+  auth_code_fetcher_->SetAutomaticallyRetryOnNetworkChanges(
+      kGetAuthCodeNetworkRetry);
+  auth_code_fetcher_->SetExtraRequestHeaders(kGetAuthCodeHeaders);
+  auth_code_fetcher_->Start();
+}
+
+void ArcAuthCodeFetcher::OnGetTokenFailure(
+    const OAuth2TokenService::Request* request,
+    const GoogleServiceAuthError& error) {
+  VLOG(2) << "Failed to get LST " << error.ToString() << ".";
+  ResetFetchers();
+
+  delegate_->OnAuthCodeFailed();
+}
+
+void ArcAuthCodeFetcher::OnURLFetchComplete(const net::URLFetcher* source) {
+  const int response_code = source->GetResponseCode();
+  std::string json_string;
+  source->GetResponseAsString(&json_string);
+
+  ResetFetchers();
+
+  if (response_code != net::HTTP_OK) {
+    VLOG(2) << "Server returned wrong response code: " << response_code << ".";
+    delegate_->OnAuthCodeFailed();
+    return;
+  }
+
+  JSONStringValueDeserializer deserializer(json_string);
+  std::string error_msg;
+  std::unique_ptr<base::Value> auth_code_info =
+      deserializer.Deserialize(nullptr, &error_msg);
+  if (!auth_code_info) {
+    VLOG(2) << "Unable to deserialize auth code json data: " << error_msg
+            << ".";
+    delegate_->OnAuthCodeFailed();
+    return;
+  }
+
+  std::unique_ptr<base::DictionaryValue> auth_code_dictionary =
+      base::DictionaryValue::From(std::move(auth_code_info));
+  if (!auth_code_dictionary) {
+    NOTREACHED();
+    delegate_->OnAuthCodeFailed();
+    return;
+  }
+
+  std::string auth_code;
+  if (!auth_code_dictionary->GetString(kToken, &auth_code) ||
+      auth_code.empty()) {
+    VLOG(2) << "Response does not contain auth code.";
+    delegate_->OnAuthCodeFailed();
+    return;
+  }
+
+  delegate_->OnAuthCodeSuccess(auth_code);
+}
+
+void ArcAuthCodeFetcher::ResetFetchers() {
+  login_token_request_.reset();
+  auth_code_fetcher_.reset();
+}
+
+}  // namespace arc