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// Copyright (c) 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 "chrome/browser/extensions/api/identity/gaia_web_auth_flow.h"
#include "base/bind.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_piece.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/trace_event/trace_event.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/signin/chrome_device_id_helper.h"
#include "chrome/browser/signin/identity_manager_factory.h"
#include "components/signin/public/identity_manager/identity_manager.h"
#include "components/signin/public/identity_manager/ubertoken_fetcher.h"
#include "google_apis/gaia/gaia_auth_fetcher.h"
#include "google_apis/gaia/gaia_urls.h"
#include "net/base/escape.h"
namespace extensions {
GaiaWebAuthFlow::GaiaWebAuthFlow(Delegate* delegate,
Profile* profile,
const ExtensionTokenKey* token_key,
const std::string& oauth2_client_id,
const std::string& locale)
: delegate_(delegate),
profile_(profile),
account_id_(token_key->account_id) {
TRACE_EVENT_ASYNC_BEGIN2("identity",
"GaiaWebAuthFlow",
this,
"extension_id",
token_key->extension_id,
"account_id",
token_key->account_id);
const char kOAuth2RedirectPathFormat[] = "/%s";
const char kOAuth2AuthorizeFormat[] =
"?response_type=token&approval_prompt=force&authuser=0&"
"client_id=%s&"
"scope=%s&"
"origin=chrome-extension://%s/&"
"redirect_uri=%s:/%s&"
"hl=%s";
// Additional parameters to pass if device_id is enabled.
const char kOAuth2AuthorizeFormatDeviceIdAddendum[] =
"&device_id=%s&"
"device_type=chrome";
std::vector<base::StringPiece> scopes(token_key->scopes.begin(),
token_key->scopes.end());
std::vector<base::StringPiece> client_id_parts = base::SplitStringPiece(
oauth2_client_id, ".", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
std::reverse(client_id_parts.begin(), client_id_parts.end());
redirect_scheme_ = base::JoinString(client_id_parts, ".");
std::string signin_scoped_device_id;
if (profile_)
signin_scoped_device_id = GetSigninScopedDeviceIdForProfile(profile_);
redirect_path_prefix_ = base::StringPrintf(kOAuth2RedirectPathFormat,
token_key->extension_id.c_str());
std::string oauth2_authorize_params = base::StringPrintf(
kOAuth2AuthorizeFormat,
oauth2_client_id.c_str(),
net::EscapeUrlEncodedData(base::JoinString(scopes, " "), true).c_str(),
token_key->extension_id.c_str(),
redirect_scheme_.c_str(),
token_key->extension_id.c_str(),
locale.c_str());
if (!signin_scoped_device_id.empty()) {
oauth2_authorize_params += base::StringPrintf(
kOAuth2AuthorizeFormatDeviceIdAddendum,
net::EscapeUrlEncodedData(signin_scoped_device_id, true).c_str());
}
auth_url_ = GaiaUrls::GetInstance()->oauth2_auth_url().Resolve(
oauth2_authorize_params);
}
GaiaWebAuthFlow::~GaiaWebAuthFlow() {
TRACE_EVENT_ASYNC_END0("identity", "GaiaWebAuthFlow", this);
if (web_flow_)
web_flow_.release()->DetachDelegateAndDelete();
}
void GaiaWebAuthFlow::Start() {
auto* identity_manager = IdentityManagerFactory::GetForProfile(profile_);
ubertoken_fetcher_ = identity_manager->CreateUbertokenFetcherForAccount(
account_id_,
base::BindOnce(&GaiaWebAuthFlow::OnUbertokenFetchComplete,
base::Unretained(this)),
gaia::GaiaSource::kChrome, profile_->GetURLLoaderFactory(),
/*bound_to_channel_id=*/false);
}
void GaiaWebAuthFlow::OnUbertokenFetchComplete(GoogleServiceAuthError error,
const std::string& token) {
if (error != GoogleServiceAuthError::AuthErrorNone()) {
TRACE_EVENT_ASYNC_STEP_PAST1("identity", "GaiaWebAuthFlow", this,
"OnUbertokenFetchComplete", "error",
error.ToString());
DVLOG(1) << "OnUbertokenFetchComplete failure: " << error.error_message();
delegate_->OnGaiaFlowFailure(GaiaWebAuthFlow::SERVICE_AUTH_ERROR, error,
std::string());
return;
}
TRACE_EVENT_ASYNC_STEP_PAST0("identity", "GaiaWebAuthFlow", this,
"OnUbertokenFetchComplete");
const char kMergeSessionQueryFormat[] = "?uberauth=%s&"
"continue=%s&"
"source=appsv2";
std::string merge_query = base::StringPrintf(
kMergeSessionQueryFormat,
net::EscapeUrlEncodedData(token, true).c_str(),
net::EscapeUrlEncodedData(auth_url_.spec(), true).c_str());
GURL merge_url(
GaiaUrls::GetInstance()->merge_session_url().Resolve(merge_query));
web_flow_ = CreateWebAuthFlow(merge_url);
web_flow_->Start();
}
void GaiaWebAuthFlow::OnAuthFlowFailure(WebAuthFlow::Failure failure) {
GaiaWebAuthFlow::Failure gaia_failure;
switch (failure) {
case WebAuthFlow::WINDOW_CLOSED:
gaia_failure = GaiaWebAuthFlow::WINDOW_CLOSED;
break;
case WebAuthFlow::LOAD_FAILED:
DVLOG(1) << "OnAuthFlowFailure LOAD_FAILED";
gaia_failure = GaiaWebAuthFlow::LOAD_FAILED;
break;
default:
NOTREACHED() << "Unexpected error from web auth flow: " << failure;
gaia_failure = GaiaWebAuthFlow::LOAD_FAILED;
break;
}
TRACE_EVENT_ASYNC_STEP_PAST1("identity",
"GaiaWebAuthFlow",
this,
"OnAuthFlowFailure",
"error",
gaia_failure);
delegate_->OnGaiaFlowFailure(
gaia_failure,
GoogleServiceAuthError(GoogleServiceAuthError::NONE),
std::string());
}
void GaiaWebAuthFlow::OnAuthFlowURLChange(const GURL& url) {
TRACE_EVENT_ASYNC_STEP_PAST0("identity",
"GaiaWebAuthFlow",
this,
"OnAuthFlowURLChange");
const char kOAuth2RedirectAccessTokenKey[] = "access_token";
const char kOAuth2RedirectErrorKey[] = "error";
const char kOAuth2ExpiresInKey[] = "expires_in";
// The format of the target URL is:
// reversed.oauth.client.id:/extensionid#access_token=TOKEN
if (url.scheme() == redirect_scheme_ && !url.has_host() && !url.has_port() &&
base::StartsWith(url.GetContent(), redirect_path_prefix_,
base::CompareCase::SENSITIVE) &&
url.has_ref()) {
web_flow_.release()->DetachDelegateAndDelete();
std::string fragment = url.ref();
base::StringPairs pairs;
base::SplitStringIntoKeyValuePairs(fragment, '=', '&', &pairs);
std::string access_token;
std::string error;
std::string expiration;
for (auto it = pairs.begin(); it != pairs.end(); ++it) {
if (it->first == kOAuth2RedirectAccessTokenKey)
access_token = it->second;
else if (it->first == kOAuth2RedirectErrorKey)
error = it->second;
else if (it->first == kOAuth2ExpiresInKey)
expiration = it->second;
}
if (access_token.empty() && error.empty()) {
delegate_->OnGaiaFlowFailure(
GaiaWebAuthFlow::INVALID_REDIRECT,
GoogleServiceAuthError(GoogleServiceAuthError::NONE),
std::string());
} else if (!error.empty()) {
delegate_->OnGaiaFlowFailure(
GaiaWebAuthFlow::OAUTH_ERROR,
GoogleServiceAuthError(GoogleServiceAuthError::NONE),
error);
} else {
delegate_->OnGaiaFlowCompleted(access_token, expiration);
}
}
}
void GaiaWebAuthFlow::OnAuthFlowTitleChange(const std::string& title) {
// On the final page the title will be "Loading <redirect-url>".
// Treat it as though we'd really been redirected to <redirect-url>.
const char kRedirectPrefix[] = "Loading ";
std::string prefix(kRedirectPrefix);
if (base::StartsWith(title, prefix, base::CompareCase::SENSITIVE)) {
GURL url(title.substr(prefix.length(), std::string::npos));
if (url.is_valid())
OnAuthFlowURLChange(url);
}
}
std::unique_ptr<WebAuthFlow> GaiaWebAuthFlow::CreateWebAuthFlow(GURL url) {
return std::unique_ptr<WebAuthFlow>(
new WebAuthFlow(this, profile_, url, WebAuthFlow::INTERACTIVE));
}
} // namespace extensions
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