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// Copyright 2013 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 "components/policy/core/common/cloud/cloud_policy_client_registration_helper.h"
#include <memory>
#include "base/bind.h"
#include "base/callback_helpers.h"
#include "base/logging.h"
#include "base/time/time.h"
#include "base/values.h"
#include "build/build_config.h"
#include "components/policy/core/common/cloud/client_data_delegate.h"
#include "components/policy/core/common/cloud/dm_auth.h"
#include "components/signin/public/identity_manager/access_token_fetcher.h"
#include "components/signin/public/identity_manager/access_token_info.h"
#include "components/signin/public/identity_manager/identity_manager.h"
#include "components/signin/public/identity_manager/scope_set.h"
#include "google_apis/gaia/gaia_constants.h"
#include "google_apis/gaia/gaia_urls.h"
#include "google_apis/gaia/google_service_auth_error.h"
#include "services/network/public/cpp/shared_url_loader_factory.h"
namespace policy {
// The key under which the hosted-domain value is stored in the UserInfo
// response.
const char kGetHostedDomainKey[] = "hd";
typedef base::OnceCallback<void(const std::string&)> StringCallback;
// This class fetches an OAuth2 token scoped for the userinfo and DM services.
class CloudPolicyClientRegistrationHelper::IdentityManagerHelper {
public:
IdentityManagerHelper() = default;
void FetchAccessToken(signin::IdentityManager* identity_manager,
const CoreAccountId& account_id,
StringCallback callback);
private:
void OnAccessTokenFetchComplete(GoogleServiceAuthError error,
signin::AccessTokenInfo token_info);
StringCallback callback_;
std::unique_ptr<signin::AccessTokenFetcher> access_token_fetcher_;
};
void CloudPolicyClientRegistrationHelper::IdentityManagerHelper::
FetchAccessToken(signin::IdentityManager* identity_manager,
const CoreAccountId& account_id,
StringCallback callback) {
DCHECK(!access_token_fetcher_);
// The caller must supply a username.
DCHECK(!account_id.empty());
DCHECK(identity_manager->HasAccountWithRefreshToken(account_id));
callback_ = std::move(callback);
signin::ScopeSet scopes;
scopes.insert(GaiaConstants::kDeviceManagementServiceOAuth);
scopes.insert(GaiaConstants::kGoogleUserInfoEmail);
access_token_fetcher_ = identity_manager->CreateAccessTokenFetcherForAccount(
account_id, "cloud_policy", scopes,
base::BindOnce(&CloudPolicyClientRegistrationHelper::
IdentityManagerHelper::OnAccessTokenFetchComplete,
base::Unretained(this)),
signin::AccessTokenFetcher::Mode::kImmediate);
}
void CloudPolicyClientRegistrationHelper::IdentityManagerHelper::
OnAccessTokenFetchComplete(GoogleServiceAuthError error,
signin::AccessTokenInfo token_info) {
DCHECK(access_token_fetcher_);
access_token_fetcher_.reset();
if (error.state() == GoogleServiceAuthError::NONE)
std::move(callback_).Run(token_info.token);
else
std::move(callback_).Run("");
}
CloudPolicyClientRegistrationHelper::CloudPolicyClientRegistrationHelper(
CloudPolicyClient* client,
enterprise_management::DeviceRegisterRequest::Type registration_type)
: client_(client), registration_type_(registration_type) {
DCHECK(client_);
}
CloudPolicyClientRegistrationHelper::~CloudPolicyClientRegistrationHelper() {
// Clean up any pending observers in case the browser is shutdown while
// trying to register for policy.
if (client_)
client_->RemoveObserver(this);
}
void CloudPolicyClientRegistrationHelper::StartRegistration(
signin::IdentityManager* identity_manager,
const CoreAccountId& account_id,
base::OnceClosure callback) {
DVLOG(1) << "Starting registration process with account_id";
DCHECK(!client_->is_registered());
callback_ = std::move(callback);
client_->AddObserver(this);
identity_manager_helper_ = std::make_unique<IdentityManagerHelper>();
identity_manager_helper_->FetchAccessToken(
identity_manager, account_id,
base::BindOnce(&CloudPolicyClientRegistrationHelper::OnTokenFetched,
base::Unretained(this)));
}
void CloudPolicyClientRegistrationHelper::StartRegistrationWithEnrollmentToken(
const std::string& token,
const std::string& client_id,
const ClientDataDelegate& client_data_delegate,
base::OnceClosure callback) {
DVLOG(1) << "Starting registration process with enrollment token";
DCHECK(!client_->is_registered());
callback_ = std::move(callback);
client_->AddObserver(this);
client_->RegisterWithToken(token, client_id, client_data_delegate);
}
void CloudPolicyClientRegistrationHelper::OnTokenFetched(
const std::string& access_token) {
identity_manager_helper_.reset();
if (access_token.empty()) {
DLOG(WARNING) << "Could not fetch access token for "
<< GaiaConstants::kDeviceManagementServiceOAuth;
RequestCompleted();
return;
}
// Cache the access token to be used after the GetUserInfo call.
oauth_access_token_ = access_token;
DVLOG(1) << "Fetched new scoped OAuth token:" << oauth_access_token_;
// Now we've gotten our access token - contact GAIA to see if this is a
// hosted domain.
user_info_fetcher_ =
std::make_unique<UserInfoFetcher>(this, client_->GetURLLoaderFactory());
user_info_fetcher_->Start(oauth_access_token_);
}
void CloudPolicyClientRegistrationHelper::OnGetUserInfoFailure(
const GoogleServiceAuthError& error) {
DVLOG(1) << "Failed to fetch user info from GAIA: " << error.state();
user_info_fetcher_.reset();
RequestCompleted();
}
void CloudPolicyClientRegistrationHelper::OnGetUserInfoSuccess(
const base::DictionaryValue* data) {
user_info_fetcher_.reset();
if (!data->FindKey(kGetHostedDomainKey)) {
DVLOG(1) << "User not from a hosted domain - skipping registration";
RequestCompleted();
return;
}
DVLOG(1) << "Registering CloudPolicyClient for user from hosted domain";
// The user is from a hosted domain, so it's OK to register the
// CloudPolicyClient and make requests to DMServer.
if (client_->is_registered()) {
// Client should not be registered yet.
NOTREACHED();
RequestCompleted();
return;
}
// Kick off registration of the CloudPolicyClient with our newly minted
// oauth_access_token_.
client_->Register(
CloudPolicyClient::RegistrationParameters(
registration_type_, enterprise_management::DeviceRegisterRequest::
FLAVOR_USER_REGISTRATION),
std::string() /* client_id */, oauth_access_token_);
}
void CloudPolicyClientRegistrationHelper::OnPolicyFetched(
CloudPolicyClient* client) {
// Ignored.
}
void CloudPolicyClientRegistrationHelper::OnRegistrationStateChanged(
CloudPolicyClient* client) {
DVLOG(1) << "Client registration succeeded";
DCHECK_EQ(client, client_);
DCHECK(client->is_registered());
RequestCompleted();
}
void CloudPolicyClientRegistrationHelper::OnClientError(
CloudPolicyClient* client) {
DVLOG(1) << "Client registration failed";
DCHECK_EQ(client, client_);
RequestCompleted();
}
void CloudPolicyClientRegistrationHelper::RequestCompleted() {
if (client_) {
client_->RemoveObserver(this);
// |client_| may be freed by the callback so clear it now.
client_ = nullptr;
std::move(callback_).Run();
}
}
} // namespace policy
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