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// Copyright 2021 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/browser/signin/user_cloud_signin_restriction_policy_fetcher.h"
#include <set>
#include "base/command_line.h"
#include "base/feature_list.h"
#include "base/json/json_reader.h"
#include "base/location.h"
#include "base/metrics/histogram_functions.h"
#include "base/strings/stringprintf.h"
#include "base/threading/thread_task_runner_handle.h"
#include "components/policy/core/browser/browser_policy_connector.h"
#include "components/policy/core/common/cloud/cloud_policy_client_registration_helper.h"
#include "components/policy/core/common/features.h"
#include "components/policy/core/common/policy_switches.h"
#include "components/policy/proto/secure_connect.pb.h"
#include "components/signin/public/identity_manager/identity_manager.h"
#include "google_apis/gaia/core_account_id.h"
#include "google_apis/gaia/gaia_constants.h"
#include "net/base/load_flags.h"
#include "net/base/url_util.h"
#include "services/network/public/cpp/resource_request.h"
#include "services/network/public/cpp/simple_url_loader.h"
#include "services/network/public/mojom/url_response_head.mojom.h"
namespace policy {
namespace {
const char kAuthorizationHeaderFormat[] = "Bearer %s";
const char kJsonContentType[] = "application/json";
const char kSecureConnectApiGetManagedAccountsSigninRestrictionsUrl[] =
"https://secureconnect-pa.clients6.google.com/"
"v1:getManagedAccountsSigninRestriction";
std::unique_ptr<network::SimpleURLLoader> CreateUrlLoader(
const GURL& url,
const std::string& access_token,
net::NetworkTrafficAnnotationTag annotation) {
auto resource_request = std::make_unique<network::ResourceRequest>();
resource_request->url = url;
resource_request->method = net::HttpRequestHeaders::kGetMethod;
resource_request->load_flags = net::LOAD_DISABLE_CACHE;
resource_request->headers.SetHeader(
net::HttpRequestHeaders::kAuthorization,
base::StringPrintf(kAuthorizationHeaderFormat, access_token.c_str()));
resource_request->headers.SetHeader(net::HttpRequestHeaders::kContentType,
kJsonContentType);
resource_request->credentials_mode = network::mojom::CredentialsMode::kOmit;
auto url_loader =
network::SimpleURLLoader::Create(std::move(resource_request), annotation);
return url_loader;
}
} // namespace
UserCloudSigninRestrictionPolicyFetcher::
UserCloudSigninRestrictionPolicyFetcher(
policy::BrowserPolicyConnector* browser_policy_connector,
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory)
: browser_policy_connector_(browser_policy_connector),
url_loader_factory_(url_loader_factory) {}
UserCloudSigninRestrictionPolicyFetcher::
~UserCloudSigninRestrictionPolicyFetcher() = default;
void UserCloudSigninRestrictionPolicyFetcher::
GetManagedAccountsSigninRestriction(
signin::IdentityManager* identity_manager,
const CoreAccountId& account_id,
base::OnceCallback<void(const std::string&)> callback) {
if (!base::FeatureList::IsEnabled(
features::kEnableUserCloudSigninRestrictionPolicyFetcher)) {
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::BindOnce(std::move(callback), std::string()));
return;
}
// base::Unretained is safe here because the callback is called in the
// lifecycle of `this`.
FetchAccessToken(
identity_manager, account_id,
base::BindOnce(&UserCloudSigninRestrictionPolicyFetcher::
GetManagedAccountsSigninRestrictionInternal,
base::Unretained(this), std::move(callback)));
}
void UserCloudSigninRestrictionPolicyFetcher::FetchAccessToken(
signin::IdentityManager* identity_manager,
const CoreAccountId& account_id,
base::OnceCallback<void(const std::string&)> callback) {
DCHECK(callback);
DCHECK(!account_id.empty());
DCHECK(identity_manager->HasAccountWithRefreshToken(account_id));
DCHECK(!access_token_fetcher_);
// base::Unretained is safe here because `access_token_fetcher_` is owned by
// `this`.
access_token_fetcher_ = identity_manager->CreateAccessTokenFetcherForAccount(
account_id, /*oauth_consumer_name=*/"cloud_policy", /*scopes=*/
{GaiaConstants::kSecureConnectOAuth2Scope},
base::BindOnce(
&UserCloudSigninRestrictionPolicyFetcher::OnFetchAccessTokenResult,
base::Unretained(this), std::move(callback)),
signin::AccessTokenFetcher::Mode::kImmediate);
}
void UserCloudSigninRestrictionPolicyFetcher::OnFetchAccessTokenResult(
base::OnceCallback<void(const std::string&)> callback,
GoogleServiceAuthError error,
signin::AccessTokenInfo token_info) {
std::move(callback).Run(
error.state() == GoogleServiceAuthError::NONE ? token_info.token : "");
}
void UserCloudSigninRestrictionPolicyFetcher::
GetManagedAccountsSigninRestrictionInternal(
base::OnceCallback<void(const std::string&)> callback,
const std::string& access_token) {
net::NetworkTrafficAnnotationTag annotation =
net::DefineNetworkTrafficAnnotation(
"managed_acccount_signin_restrictions_secure_connect", R"(
semantics {
sender: "SecureConnect Service"
description:
"A request to the SecureConnect API to retrieve the value of the "
"ManagedAccountsSigninRestriction policy for the signed in user."
trigger:
"After a user signs into a managed account and if they have not "
"explicitely accepted to use a managed profile and no value for the "
"profile separation is not enforced by any machine level policy."
data:
"Gaia access token."
destination: GOOGLE_OWNED_SERVICE
}
policy {
cookies_allowed: NO
chrome_policy {
SigninInterceptionEnabled {
SigninInterceptionEnabled: false
}
}
})");
// Each url loader can only be used for one request.
url_loader_ =
CreateUrlLoader(GetSecureConnectApiGetAccountSigninRestrictionUrl(),
access_token, annotation);
// base::Unretained is safe here because `url_loader_` is owned by `this`.
url_loader_->DownloadToString(
url_loader_factory_for_testing_ == nullptr
? url_loader_factory_.get()
: url_loader_factory_for_testing_.get(),
base::BindOnce(&UserCloudSigninRestrictionPolicyFetcher::
OnManagedAccountsSigninRestrictionResult,
base::Unretained(this), std::move(callback)),
1024 * 1024 /* 1 MiB */);
}
void UserCloudSigninRestrictionPolicyFetcher::
OnManagedAccountsSigninRestrictionResult(
base::OnceCallback<void(const std::string&)> callback,
std::unique_ptr<std::string> response_body) {
std::string restriction;
std::unique_ptr<network::SimpleURLLoader> url_loader = std::move(url_loader_);
GoogleServiceAuthError error = GoogleServiceAuthError::AuthErrorNone();
absl::optional<int> response_code;
if (url_loader->ResponseInfo() && url_loader->ResponseInfo()->headers)
response_code = url_loader->ResponseInfo()->headers->response_code();
if (response_code)
base::UmaHistogramSparse(
"Enterprise.ProfileSeparation.DasherPolicyFetch.HttpResponse",
response_code.value());
base::UmaHistogramSparse(
"Enterprise.ProfileSeparation.DasherPolicyFetch.NetworkError",
url_loader->NetError());
if (url_loader->NetError() != net::OK) {
if (response_code) {
LOG(WARNING)
<< "ManagedAccountsSigninRestriction request failed with HTTP code: "
<< response_code.value();
} else {
error =
GoogleServiceAuthError::FromConnectionError(url_loader->NetError());
LOG(WARNING)
<< "ManagedAccountsSigninRestriction request failed with error: "
<< url_loader->NetError();
}
}
if (error.state() == GoogleServiceAuthError::NONE && response_body) {
auto result = base::JSONReader::Read(*response_body, base::JSON_PARSE_RFC);
if (result && result->FindStringKey("policyValue"))
restriction = *result->FindStringKey("policyValue");
else
LOG(WARNING) << "Failed to ManagedAccountsSigninRestriction response";
}
std::move(callback).Run(std::move(restriction));
}
GURL UserCloudSigninRestrictionPolicyFetcher::
GetSecureConnectApiGetAccountSigninRestrictionUrl() const {
base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
std::string url =
command_line->HasSwitch(policy::switches::kSecureConnectApiUrl) &&
browser_policy_connector_ &&
browser_policy_connector_->IsCommandLineSwitchSupported()
? command_line->GetSwitchValueASCII(
policy::switches::kSecureConnectApiUrl)
: kSecureConnectApiGetManagedAccountsSigninRestrictionsUrl;
return GURL(url);
}
} // namespace policy
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