identity_api.cc revision 7dbb3d5cf0c15f500944d211057644d6a2f37371 
1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "chrome/browser/extensions/api/identity/identity_api.h"
6
7#include <set>
8#include <string>
9#include <utility>
10#include <vector>
11
12#include "base/lazy_instance.h"
13#include "base/prefs/pref_service.h"
14#include "base/strings/string_number_conversions.h"
15#include "base/strings/stringprintf.h"
16#include "base/values.h"
17#include "chrome/browser/app_mode/app_mode_utils.h"
18#include "chrome/browser/browser_process.h"
19#include "chrome/browser/chrome_notification_types.h"
20#include "chrome/browser/extensions/extension_function_dispatcher.h"
21#include "chrome/browser/extensions/extension_service.h"
22#include "chrome/browser/policy/browser_policy_connector.h"
23#include "chrome/browser/profiles/profile.h"
24#include "chrome/browser/signin/profile_oauth2_token_service.h"
25#include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
26#include "chrome/browser/signin/signin_global_error.h"
27#include "chrome/common/extensions/api/identity.h"
28#include "chrome/common/extensions/api/identity/oauth2_manifest_handler.h"
29#include "chrome/common/extensions/extension.h"
30#include "chrome/common/extensions/extension_manifest_constants.h"
31#include "chrome/common/pref_names.h"
32#include "chrome/common/url_constants.h"
33#include "google_apis/gaia/gaia_urls.h"
34#include "url/gurl.h"
35
36#if defined(OS_CHROMEOS)
37#include "chrome/browser/chromeos/login/user_manager.h"
38#include "chrome/browser/chromeos/settings/device_oauth2_token_service.h"
39#include "chrome/browser/chromeos/settings/device_oauth2_token_service_factory.h"
40#endif
41
42namespace extensions {
43
44namespace identity_constants {
45const char kInvalidClientId[] = "Invalid OAuth2 Client ID.";
46const char kInvalidScopes[] = "Invalid OAuth2 scopes.";
47const char kAuthFailure[] = "OAuth2 request failed: ";
48const char kNoGrant[] = "OAuth2 not granted or revoked.";
49const char kUserRejected[] = "The user did not approve access.";
50const char kUserNotSignedIn[] = "The user is not signed in.";
51const char kInteractionRequired[] = "User interaction required.";
52const char kInvalidRedirect[] = "Did not redirect to the right URL.";
53const char kOffTheRecord[] = "Identity API is disabled in incognito windows.";
54const char kPageLoadFailure[] = "Authorization page could not be loaded.";
55
56const int kCachedIssueAdviceTTLSeconds = 1;
57}  // namespace identity_constants
58
59namespace {
60
61static const char kChromiumDomainRedirectUrlPattern[] =
62    "https://%s.chromiumapp.org/";
63
64}  // namespace
65
66namespace identity = api::identity;
67
68IdentityGetAuthTokenFunction::IdentityGetAuthTokenFunction()
69    : should_prompt_for_scopes_(false),
70      should_prompt_for_signin_(false) {}
71
72IdentityGetAuthTokenFunction::~IdentityGetAuthTokenFunction() {}
73
74bool IdentityGetAuthTokenFunction::RunImpl() {
75  if (profile()->IsOffTheRecord()) {
76    error_ = identity_constants::kOffTheRecord;
77    return false;
78  }
79
80  scoped_ptr<identity::GetAuthToken::Params> params(
81      identity::GetAuthToken::Params::Create(*args_));
82  EXTENSION_FUNCTION_VALIDATE(params.get());
83  bool interactive = params->details.get() &&
84      params->details->interactive.get() &&
85      *params->details->interactive;
86
87  should_prompt_for_scopes_ = interactive;
88  should_prompt_for_signin_ = interactive;
89
90  const OAuth2Info& oauth2_info = OAuth2Info::GetOAuth2Info(GetExtension());
91
92  // Check that the necessary information is present in the manifest.
93  oauth2_client_id_ = GetOAuth2ClientId();
94  if (oauth2_client_id_.empty()) {
95    error_ = identity_constants::kInvalidClientId;
96    return false;
97  }
98
99  if (oauth2_info.scopes.size() == 0) {
100    error_ = identity_constants::kInvalidScopes;
101    return false;
102  }
103
104  // Balanced in CompleteFunctionWithResult|CompleteFunctionWithError
105  AddRef();
106
107#if defined(OS_CHROMEOS)
108  if (chromeos::UserManager::Get()->IsLoggedInAsKioskApp() &&
109      g_browser_process->browser_policy_connector()->IsEnterpriseManaged()) {
110    StartMintTokenFlow(IdentityMintRequestQueue::MINT_TYPE_NONINTERACTIVE);
111    return true;
112  }
113#endif
114
115  if (!HasLoginToken()) {
116    if (!should_prompt_for_signin_) {
117      error_ = identity_constants::kUserNotSignedIn;
118      Release();
119      return false;
120    }
121    // Display a login prompt.
122    StartSigninFlow();
123  } else {
124    StartMintTokenFlow(IdentityMintRequestQueue::MINT_TYPE_NONINTERACTIVE);
125  }
126
127  return true;
128}
129
130void IdentityGetAuthTokenFunction::CompleteFunctionWithResult(
131    const std::string& access_token) {
132  SetResult(Value::CreateStringValue(access_token));
133  SendResponse(true);
134  Release();  // Balanced in RunImpl.
135}
136
137void IdentityGetAuthTokenFunction::CompleteFunctionWithError(
138    const std::string& error) {
139  error_ = error;
140  SendResponse(false);
141  Release();  // Balanced in RunImpl.
142}
143
144void IdentityGetAuthTokenFunction::StartSigninFlow() {
145  // All cached tokens are invalid because the user is not signed in.
146  IdentityAPI* id_api =
147      extensions::IdentityAPI::GetFactoryInstance()->GetForProfile(profile_);
148  id_api->EraseAllCachedTokens();
149  // Display a login prompt. If the subsequent mint fails, don't display the
150  // login prompt again.
151  should_prompt_for_signin_ = false;
152  ShowLoginPopup();
153}
154
155void IdentityGetAuthTokenFunction::StartMintTokenFlow(
156    IdentityMintRequestQueue::MintType type) {
157  mint_token_flow_type_ = type;
158
159  // Flows are serialized to prevent excessive traffic to GAIA, and
160  // to consolidate UI pop-ups.
161  const OAuth2Info& oauth2_info = OAuth2Info::GetOAuth2Info(GetExtension());
162  std::set<std::string> scopes(oauth2_info.scopes.begin(),
163                               oauth2_info.scopes.end());
164  IdentityAPI* id_api =
165      extensions::IdentityAPI::GetFactoryInstance()->GetForProfile(profile_);
166
167  if (!should_prompt_for_scopes_) {
168    // Caller requested no interaction.
169
170    if (type == IdentityMintRequestQueue::MINT_TYPE_INTERACTIVE) {
171      // GAIA told us to do a consent UI.
172      CompleteFunctionWithError(identity_constants::kNoGrant);
173      return;
174    }
175    if (!id_api->mint_queue()->empty(
176            IdentityMintRequestQueue::MINT_TYPE_INTERACTIVE,
177            GetExtension()->id(), scopes)) {
178      // Another call is going through a consent UI.
179      CompleteFunctionWithError(identity_constants::kNoGrant);
180      return;
181    }
182  }
183  id_api->mint_queue()->RequestStart(type,
184                                     GetExtension()->id(),
185                                     scopes,
186                                     this);
187}
188
189void IdentityGetAuthTokenFunction::CompleteMintTokenFlow() {
190  IdentityMintRequestQueue::MintType type = mint_token_flow_type_;
191
192  const OAuth2Info& oauth2_info = OAuth2Info::GetOAuth2Info(GetExtension());
193  std::set<std::string> scopes(oauth2_info.scopes.begin(),
194                               oauth2_info.scopes.end());
195
196  extensions::IdentityAPI::GetFactoryInstance()->GetForProfile(
197      profile_)->mint_queue()->RequestComplete(type,
198                                               GetExtension()->id(),
199                                               scopes,
200                                               this);
201}
202
203void IdentityGetAuthTokenFunction::StartMintToken(
204    IdentityMintRequestQueue::MintType type) {
205  const OAuth2Info& oauth2_info = OAuth2Info::GetOAuth2Info(GetExtension());
206  IdentityAPI* id_api = IdentityAPI::GetFactoryInstance()->GetForProfile(
207      profile());
208  IdentityTokenCacheValue cache_entry = id_api->GetCachedToken(
209      GetExtension()->id(), oauth2_info.scopes);
210  IdentityTokenCacheValue::CacheValueStatus cache_status =
211      cache_entry.status();
212
213  if (type == IdentityMintRequestQueue::MINT_TYPE_NONINTERACTIVE) {
214    switch (cache_status) {
215      case IdentityTokenCacheValue::CACHE_STATUS_NOTFOUND:
216#if defined(OS_CHROMEOS)
217        // Always force minting token for ChromeOS kiosk app.
218        if (chromeos::UserManager::Get()->IsLoggedInAsKioskApp()) {
219          if (g_browser_process->browser_policy_connector()->
220                  IsEnterpriseManaged()) {
221            OAuth2TokenService::ScopeSet scope_set(oauth2_info.scopes.begin(),
222                                                   oauth2_info.scopes.end());
223            device_token_request_ =
224                chromeos::DeviceOAuth2TokenServiceFactory::Get()->StartRequest(
225                    scope_set, this);
226          } else {
227            gaia_mint_token_mode_ = OAuth2MintTokenFlow::MODE_MINT_TOKEN_FORCE;
228            StartLoginAccessTokenRequest();
229          }
230          return;
231        }
232#endif
233
234        if (oauth2_info.auto_approve)
235          // oauth2_info.auto_approve is protected by a whitelist in
236          // _manifest_features.json hence only selected extensions take
237          // advantage of forcefully minting the token.
238          gaia_mint_token_mode_ = OAuth2MintTokenFlow::MODE_MINT_TOKEN_FORCE;
239        else
240          gaia_mint_token_mode_ = OAuth2MintTokenFlow::MODE_MINT_TOKEN_NO_FORCE;
241        StartLoginAccessTokenRequest();
242        break;
243
244      case IdentityTokenCacheValue::CACHE_STATUS_TOKEN:
245        CompleteMintTokenFlow();
246        CompleteFunctionWithResult(cache_entry.token());
247        break;
248
249      case IdentityTokenCacheValue::CACHE_STATUS_ADVICE:
250        CompleteMintTokenFlow();
251        should_prompt_for_signin_ = false;
252        issue_advice_ = cache_entry.issue_advice();
253        StartMintTokenFlow(IdentityMintRequestQueue::MINT_TYPE_INTERACTIVE);
254        break;
255    }
256  } else {
257    DCHECK(type == IdentityMintRequestQueue::MINT_TYPE_INTERACTIVE);
258
259    if (cache_status == IdentityTokenCacheValue::CACHE_STATUS_TOKEN) {
260      CompleteMintTokenFlow();
261      CompleteFunctionWithResult(cache_entry.token());
262    } else {
263      ShowOAuthApprovalDialog(issue_advice_);
264    }
265  }
266}
267
268void IdentityGetAuthTokenFunction::OnMintTokenSuccess(
269    const std::string& access_token, int time_to_live) {
270  const OAuth2Info& oauth2_info = OAuth2Info::GetOAuth2Info(GetExtension());
271  IdentityTokenCacheValue token(access_token,
272                                base::TimeDelta::FromSeconds(time_to_live));
273  IdentityAPI::GetFactoryInstance()->GetForProfile(profile())->SetCachedToken(
274      GetExtension()->id(), oauth2_info.scopes, token);
275
276  CompleteMintTokenFlow();
277  CompleteFunctionWithResult(access_token);
278}
279
280void IdentityGetAuthTokenFunction::OnMintTokenFailure(
281    const GoogleServiceAuthError& error) {
282  CompleteMintTokenFlow();
283
284  switch (error.state()) {
285    case GoogleServiceAuthError::INVALID_GAIA_CREDENTIALS:
286    case GoogleServiceAuthError::ACCOUNT_DELETED:
287    case GoogleServiceAuthError::ACCOUNT_DISABLED:
288      extensions::IdentityAPI::GetFactoryInstance()->GetForProfile(
289          profile())->ReportAuthError(error);
290      if (should_prompt_for_signin_) {
291        // Display a login prompt and try again (once).
292        StartSigninFlow();
293        return;
294      }
295      break;
296    default:
297      // Return error to caller.
298      break;
299  }
300
301  CompleteFunctionWithError(
302      std::string(identity_constants::kAuthFailure) + error.ToString());
303}
304
305void IdentityGetAuthTokenFunction::OnIssueAdviceSuccess(
306    const IssueAdviceInfo& issue_advice) {
307  const OAuth2Info& oauth2_info = OAuth2Info::GetOAuth2Info(GetExtension());
308  IdentityAPI::GetFactoryInstance()->GetForProfile(profile())->SetCachedToken(
309      GetExtension()->id(), oauth2_info.scopes,
310      IdentityTokenCacheValue(issue_advice));
311  CompleteMintTokenFlow();
312
313  should_prompt_for_signin_ = false;
314  // Existing grant was revoked and we used NO_FORCE, so we got info back
315  // instead. Start a consent UI if we can.
316  issue_advice_ = issue_advice;
317  StartMintTokenFlow(IdentityMintRequestQueue::MINT_TYPE_INTERACTIVE);
318}
319
320void IdentityGetAuthTokenFunction::SigninSuccess() {
321  StartMintTokenFlow(IdentityMintRequestQueue::MINT_TYPE_NONINTERACTIVE);
322}
323
324void IdentityGetAuthTokenFunction::SigninFailed() {
325  CompleteFunctionWithError(identity_constants::kUserNotSignedIn);
326}
327
328void IdentityGetAuthTokenFunction::OnGaiaFlowFailure(
329    GaiaWebAuthFlow::Failure failure,
330    GoogleServiceAuthError service_error,
331    const std::string& oauth_error) {
332  CompleteMintTokenFlow();
333  std::string error;
334
335  switch (failure) {
336    case GaiaWebAuthFlow::WINDOW_CLOSED:
337      error = identity_constants::kUserRejected;
338      break;
339
340    case GaiaWebAuthFlow::INVALID_REDIRECT:
341      error = identity_constants::kInvalidRedirect;
342      break;
343
344    case GaiaWebAuthFlow::SERVICE_AUTH_ERROR:
345      error = std::string(identity_constants::kAuthFailure) +
346          service_error.ToString();
347      break;
348
349    case GaiaWebAuthFlow::OAUTH_ERROR:
350      error = MapOAuth2ErrorToDescription(oauth_error);
351      break;
352
353    case GaiaWebAuthFlow::LOAD_FAILED:
354      error = identity_constants::kPageLoadFailure;
355      break;
356
357    default:
358      NOTREACHED() << "Unexpected error from gaia web auth flow: " << failure;
359      error = identity_constants::kInvalidRedirect;
360      break;
361  }
362
363  CompleteFunctionWithError(error);
364}
365
366void IdentityGetAuthTokenFunction::OnGaiaFlowCompleted(
367    const std::string& access_token,
368    const std::string& expiration) {
369
370  int time_to_live;
371  if (!expiration.empty() && base::StringToInt(expiration, &time_to_live)) {
372    const OAuth2Info& oauth2_info = OAuth2Info::GetOAuth2Info(GetExtension());
373    IdentityTokenCacheValue token_value(
374        access_token, base::TimeDelta::FromSeconds(time_to_live));
375    IdentityAPI::GetFactoryInstance()->GetForProfile(profile())
376        ->SetCachedToken(GetExtension()->id(), oauth2_info.scopes, token_value);
377  }
378
379  CompleteMintTokenFlow();
380  CompleteFunctionWithResult(access_token);
381}
382
383void IdentityGetAuthTokenFunction::OnGetTokenSuccess(
384    const OAuth2TokenService::Request* request,
385    const std::string& access_token,
386    const base::Time& expiration_time) {
387  if (login_token_request_.get() == request) {
388    login_token_request_.reset();
389    StartGaiaRequest(access_token);
390  } else {
391    DCHECK_EQ(device_token_request_.get(), request);
392    device_token_request_.reset();
393
394    const OAuth2Info& oauth2_info = OAuth2Info::GetOAuth2Info(GetExtension());
395    IdentityTokenCacheValue token(access_token,
396                                  expiration_time - base::Time::Now());
397    IdentityAPI::GetFactoryInstance()->GetForProfile(profile())->SetCachedToken(
398        GetExtension()->id(), oauth2_info.scopes, token);
399
400    CompleteMintTokenFlow();
401    CompleteFunctionWithResult(access_token);
402  }
403}
404
405void IdentityGetAuthTokenFunction::OnGetTokenFailure(
406    const OAuth2TokenService::Request* request,
407    const GoogleServiceAuthError& error) {
408  if (login_token_request_.get() == request) {
409    login_token_request_.reset();
410  } else {
411    DCHECK_EQ(device_token_request_.get(), request);
412    device_token_request_.reset();
413  }
414
415  OnGaiaFlowFailure(GaiaWebAuthFlow::SERVICE_AUTH_ERROR, error, std::string());
416}
417
418void IdentityGetAuthTokenFunction::StartLoginAccessTokenRequest() {
419  login_token_request_ =
420      ProfileOAuth2TokenServiceFactory::GetForProfile(profile())->
421          StartRequest(OAuth2TokenService::ScopeSet(), this);
422}
423
424void IdentityGetAuthTokenFunction::StartGaiaRequest(
425    const std::string& login_access_token) {
426  DCHECK(!login_access_token.empty());
427  mint_token_flow_.reset(CreateMintTokenFlow(login_access_token));
428  mint_token_flow_->Start();
429}
430
431void IdentityGetAuthTokenFunction::ShowLoginPopup() {
432  signin_flow_.reset(new IdentitySigninFlow(this, profile()));
433  signin_flow_->Start();
434}
435
436void IdentityGetAuthTokenFunction::ShowOAuthApprovalDialog(
437    const IssueAdviceInfo& issue_advice) {
438  const OAuth2Info& oauth2_info = OAuth2Info::GetOAuth2Info(GetExtension());
439  const std::string locale = g_browser_process->local_state()->GetString(
440      prefs::kApplicationLocale);
441
442  gaia_web_auth_flow_.reset(new GaiaWebAuthFlow(
443      this, profile(), GetExtension()->id(), oauth2_info, locale));
444  gaia_web_auth_flow_->Start();
445}
446
447OAuth2MintTokenFlow* IdentityGetAuthTokenFunction::CreateMintTokenFlow(
448    const std::string& login_access_token) {
449  const OAuth2Info& oauth2_info = OAuth2Info::GetOAuth2Info(GetExtension());
450
451  OAuth2MintTokenFlow* mint_token_flow =
452      new OAuth2MintTokenFlow(
453          profile()->GetRequestContext(),
454          this,
455          OAuth2MintTokenFlow::Parameters(
456              login_access_token,
457              GetExtension()->id(),
458              oauth2_client_id_,
459              oauth2_info.scopes,
460              gaia_mint_token_mode_));
461#if defined(OS_CHROMEOS)
462  if (chrome::IsRunningInForcedAppMode()) {
463    std::string chrome_client_id;
464    std::string chrome_client_secret;
465    if (chromeos::UserManager::Get()->GetAppModeChromeClientOAuthInfo(
466           &chrome_client_id, &chrome_client_secret)) {
467      mint_token_flow->SetChromeOAuthClientInfo(chrome_client_id,
468                                                chrome_client_secret);
469    }
470  }
471#endif
472  return mint_token_flow;
473}
474
475bool IdentityGetAuthTokenFunction::HasLoginToken() const {
476  return ProfileOAuth2TokenServiceFactory::GetForProfile(profile())->
477      RefreshTokenIsAvailable();
478}
479
480std::string IdentityGetAuthTokenFunction::MapOAuth2ErrorToDescription(
481    const std::string& error) {
482  const char kOAuth2ErrorAccessDenied[] = "access_denied";
483  const char kOAuth2ErrorInvalidScope[] = "invalid_scope";
484
485  if (error == kOAuth2ErrorAccessDenied)
486    return std::string(identity_constants::kUserRejected);
487  else if (error == kOAuth2ErrorInvalidScope)
488    return std::string(identity_constants::kInvalidScopes);
489  else
490    return std::string(identity_constants::kAuthFailure) + error;
491}
492
493std::string IdentityGetAuthTokenFunction::GetOAuth2ClientId() const {
494  const OAuth2Info& oauth2_info = OAuth2Info::GetOAuth2Info(GetExtension());
495  std::string client_id = oauth2_info.client_id;
496
497  // Component apps using auto_approve may use Chrome's client ID by
498  // omitting the field.
499  if (client_id.empty() && GetExtension()->location() == Manifest::COMPONENT &&
500      oauth2_info.auto_approve) {
501    client_id = GaiaUrls::GetInstance()->oauth2_chrome_client_id();
502  }
503  return client_id;
504}
505
506IdentityRemoveCachedAuthTokenFunction::IdentityRemoveCachedAuthTokenFunction() {
507}
508
509IdentityRemoveCachedAuthTokenFunction::
510    ~IdentityRemoveCachedAuthTokenFunction() {
511}
512
513bool IdentityRemoveCachedAuthTokenFunction::RunImpl() {
514  if (profile()->IsOffTheRecord()) {
515    error_ = identity_constants::kOffTheRecord;
516    return false;
517  }
518
519  scoped_ptr<identity::RemoveCachedAuthToken::Params> params(
520      identity::RemoveCachedAuthToken::Params::Create(*args_));
521  EXTENSION_FUNCTION_VALIDATE(params.get());
522  IdentityAPI::GetFactoryInstance()->GetForProfile(profile())->EraseCachedToken(
523      GetExtension()->id(), params->details.token);
524  return true;
525}
526
527IdentityLaunchWebAuthFlowFunction::IdentityLaunchWebAuthFlowFunction() {}
528
529IdentityLaunchWebAuthFlowFunction::~IdentityLaunchWebAuthFlowFunction() {
530  if (auth_flow_)
531    auth_flow_.release()->DetachDelegateAndDelete();
532}
533
534bool IdentityLaunchWebAuthFlowFunction::RunImpl() {
535  if (profile()->IsOffTheRecord()) {
536    error_ = identity_constants::kOffTheRecord;
537    return false;
538  }
539
540  scoped_ptr<identity::LaunchWebAuthFlow::Params> params(
541      identity::LaunchWebAuthFlow::Params::Create(*args_));
542  EXTENSION_FUNCTION_VALIDATE(params.get());
543
544  GURL auth_url(params->details.url);
545  WebAuthFlow::Mode mode =
546      params->details.interactive && *params->details.interactive ?
547      WebAuthFlow::INTERACTIVE : WebAuthFlow::SILENT;
548
549  // Set up acceptable target URLs. (Does not include chrome-extension
550  // scheme for this version of the API.)
551  InitFinalRedirectURLPrefix(GetExtension()->id());
552
553  AddRef();  // Balanced in OnAuthFlowSuccess/Failure.
554
555  auth_flow_.reset(new WebAuthFlow(this, profile(), auth_url, mode));
556  auth_flow_->Start();
557  return true;
558}
559
560void IdentityLaunchWebAuthFlowFunction::InitFinalRedirectURLPrefixForTest(
561    const std::string& extension_id) {
562  InitFinalRedirectURLPrefix(extension_id);
563}
564
565void IdentityLaunchWebAuthFlowFunction::InitFinalRedirectURLPrefix(
566    const std::string& extension_id) {
567  if (final_url_prefix_.is_empty()) {
568    final_url_prefix_ = GURL(base::StringPrintf(
569        kChromiumDomainRedirectUrlPattern, extension_id.c_str()));
570  }
571}
572
573void IdentityLaunchWebAuthFlowFunction::OnAuthFlowFailure(
574    WebAuthFlow::Failure failure) {
575  switch (failure) {
576    case WebAuthFlow::WINDOW_CLOSED:
577      error_ = identity_constants::kUserRejected;
578      break;
579    case WebAuthFlow::INTERACTION_REQUIRED:
580      error_ = identity_constants::kInteractionRequired;
581      break;
582    case WebAuthFlow::LOAD_FAILED:
583      error_ = identity_constants::kPageLoadFailure;
584      break;
585    default:
586      NOTREACHED() << "Unexpected error from web auth flow: " << failure;
587      error_ = identity_constants::kInvalidRedirect;
588      break;
589  }
590  SendResponse(false);
591  Release();  // Balanced in RunImpl.
592}
593
594void IdentityLaunchWebAuthFlowFunction::OnAuthFlowURLChange(
595    const GURL& redirect_url) {
596  if (redirect_url.GetWithEmptyPath() == final_url_prefix_) {
597    SetResult(Value::CreateStringValue(redirect_url.spec()));
598    SendResponse(true);
599    Release();  // Balanced in RunImpl.
600  }
601}
602
603IdentityTokenCacheValue::IdentityTokenCacheValue()
604    : status_(CACHE_STATUS_NOTFOUND) {
605}
606
607IdentityTokenCacheValue::IdentityTokenCacheValue(
608    const IssueAdviceInfo& issue_advice) : status_(CACHE_STATUS_ADVICE),
609                                           issue_advice_(issue_advice) {
610  expiration_time_ = base::Time::Now() + base::TimeDelta::FromSeconds(
611      identity_constants::kCachedIssueAdviceTTLSeconds);
612}
613
614IdentityTokenCacheValue::IdentityTokenCacheValue(
615    const std::string& token, base::TimeDelta time_to_live)
616    : status_(CACHE_STATUS_TOKEN),
617      token_(token) {
618  base::TimeDelta zero_delta;
619  if (time_to_live < zero_delta)
620    time_to_live = zero_delta;
621
622  expiration_time_ = base::Time::Now() + time_to_live;
623}
624
625IdentityTokenCacheValue::~IdentityTokenCacheValue() {
626}
627
628IdentityTokenCacheValue::CacheValueStatus
629    IdentityTokenCacheValue::status() const {
630  if (is_expired())
631    return IdentityTokenCacheValue::CACHE_STATUS_NOTFOUND;
632  else
633    return status_;
634}
635
636const IssueAdviceInfo& IdentityTokenCacheValue::issue_advice() const {
637  return issue_advice_;
638}
639
640const std::string& IdentityTokenCacheValue::token() const {
641  return token_;
642}
643
644bool IdentityTokenCacheValue::is_expired() const {
645  return status_ == CACHE_STATUS_NOTFOUND ||
646      expiration_time_ < base::Time::Now();
647}
648
649const base::Time& IdentityTokenCacheValue::expiration_time() const {
650  return expiration_time_;
651}
652
653IdentityAPI::IdentityAPI(Profile* profile)
654    : profile_(profile),
655      error_(GoogleServiceAuthError::NONE),
656      initialized_(false) {
657}
658
659IdentityAPI::~IdentityAPI() {
660}
661
662void IdentityAPI::Initialize() {
663  SigninGlobalError::GetForProfile(profile_)->AddProvider(this);
664  ProfileOAuth2TokenServiceFactory::GetForProfile(profile_)->AddObserver(this);
665
666  initialized_ = true;
667}
668
669IdentityMintRequestQueue* IdentityAPI::mint_queue() {
670    return &mint_queue_;
671}
672
673void IdentityAPI::SetCachedToken(const std::string& extension_id,
674                                 const std::vector<std::string> scopes,
675                                 const IdentityTokenCacheValue& token_data) {
676  std::set<std::string> scopeset(scopes.begin(), scopes.end());
677  TokenCacheKey key(extension_id, scopeset);
678
679  CachedTokens::iterator it = token_cache_.find(key);
680  if (it != token_cache_.end() && it->second.status() <= token_data.status())
681    token_cache_.erase(it);
682
683  token_cache_.insert(std::make_pair(key, token_data));
684}
685
686void IdentityAPI::EraseCachedToken(const std::string& extension_id,
687                                   const std::string& token) {
688  CachedTokens::iterator it;
689  for (it = token_cache_.begin(); it != token_cache_.end(); ++it) {
690    if (it->first.extension_id == extension_id &&
691        it->second.status() == IdentityTokenCacheValue::CACHE_STATUS_TOKEN &&
692        it->second.token() == token) {
693      token_cache_.erase(it);
694      break;
695    }
696  }
697}
698
699void IdentityAPI::EraseAllCachedTokens() {
700  token_cache_.clear();
701}
702
703const IdentityTokenCacheValue& IdentityAPI::GetCachedToken(
704    const std::string& extension_id, const std::vector<std::string> scopes) {
705  std::set<std::string> scopeset(scopes.begin(), scopes.end());
706  TokenCacheKey key(extension_id, scopeset);
707  return token_cache_[key];
708}
709
710const IdentityAPI::CachedTokens& IdentityAPI::GetAllCachedTokens() {
711  return token_cache_;
712}
713
714void IdentityAPI::ReportAuthError(const GoogleServiceAuthError& error) {
715  error_ = error;
716  SigninGlobalError::GetForProfile(profile_)->AuthStatusChanged();
717}
718
719void IdentityAPI::Shutdown() {
720  if (!initialized_)
721    return;
722
723  SigninGlobalError::GetForProfile(profile_)->RemoveProvider(this);
724  ProfileOAuth2TokenServiceFactory::GetForProfile(profile_)->
725      RemoveObserver(this);
726
727  initialized_ = false;
728}
729
730static base::LazyInstance<ProfileKeyedAPIFactory<IdentityAPI> >
731    g_factory = LAZY_INSTANCE_INITIALIZER;
732
733// static
734ProfileKeyedAPIFactory<IdentityAPI>* IdentityAPI::GetFactoryInstance() {
735  return &g_factory.Get();
736}
737
738GoogleServiceAuthError IdentityAPI::GetAuthStatus() const {
739  return error_;
740}
741
742void IdentityAPI::OnRefreshTokenAvailable(const std::string& account_id) {
743  error_ = GoogleServiceAuthError::AuthErrorNone();
744}
745
746template <>
747void ProfileKeyedAPIFactory<IdentityAPI>::DeclareFactoryDependencies() {
748  DependsOn(ExtensionSystemFactory::GetInstance());
749  // Need dependency on ProfileOAuth2TokenServiceFactory because it owns
750  // the SigninGlobalError instance.
751  DependsOn(ProfileOAuth2TokenServiceFactory::GetInstance());
752}
753
754IdentityAPI::TokenCacheKey::TokenCacheKey(const std::string& extension_id,
755                                          const std::set<std::string> scopes)
756    : extension_id(extension_id),
757      scopes(scopes) {
758}
759
760IdentityAPI::TokenCacheKey::~TokenCacheKey() {
761}
762
763bool IdentityAPI::TokenCacheKey::operator<(
764    const IdentityAPI::TokenCacheKey& rhs) const {
765  if (extension_id < rhs.extension_id)
766    return true;
767  else if (rhs.extension_id < extension_id)
768    return false;
769
770  return scopes < rhs.scopes;
771}
772
773}  // namespace extensions
774