identity_api.h revision e5d81f57cb97b3b6b7fccc9c5610d21eb81db09d 
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#ifndef CHROME_BROWSER_EXTENSIONS_API_IDENTITY_IDENTITY_API_H_
6#define CHROME_BROWSER_EXTENSIONS_API_IDENTITY_IDENTITY_API_H_
7
8#include <map>
9#include <set>
10#include <string>
11#include <utility>
12#include <vector>
13
14#include "base/memory/ref_counted.h"
15#include "base/memory/weak_ptr.h"
16#include "base/observer_list.h"
17#include "chrome/browser/extensions/api/identity/account_tracker.h"
18#include "chrome/browser/extensions/api/identity/extension_token_key.h"
19#include "chrome/browser/extensions/api/identity/gaia_web_auth_flow.h"
20#include "chrome/browser/extensions/api/identity/identity_mint_queue.h"
21#include "chrome/browser/extensions/api/identity/identity_signin_flow.h"
22#include "chrome/browser/extensions/api/identity/web_auth_flow.h"
23#include "chrome/browser/extensions/chrome_extension_function.h"
24#include "chrome/browser/signin/signin_global_error.h"
25#include "extensions/browser/browser_context_keyed_api_factory.h"
26#include "google_apis/gaia/oauth2_mint_token_flow.h"
27#include "google_apis/gaia/oauth2_token_service.h"
28
29class GoogleServiceAuthError;
30class MockGetAuthTokenFunction;
31
32namespace content {
33class BrowserContext;
34}
35
36namespace extensions {
37
38class GetAuthTokenFunctionTest;
39class MockGetAuthTokenFunction;
40
41namespace identity_constants {
42extern const char kInvalidClientId[];
43extern const char kInvalidScopes[];
44extern const char kAuthFailure[];
45extern const char kNoGrant[];
46extern const char kUserRejected[];
47extern const char kUserNotSignedIn[];
48extern const char kInteractionRequired[];
49extern const char kInvalidRedirect[];
50extern const char kOffTheRecord[];
51extern const char kPageLoadFailure[];
52extern const char kCanceled[];
53}  // namespace identity_constants
54
55class IdentityTokenCacheValue {
56 public:
57  IdentityTokenCacheValue();
58  explicit IdentityTokenCacheValue(const IssueAdviceInfo& issue_advice);
59  IdentityTokenCacheValue(const std::string& token,
60                          base::TimeDelta time_to_live);
61  ~IdentityTokenCacheValue();
62
63  // Order of these entries is used to determine whether or not new
64  // entries supercede older ones in SetCachedToken.
65  enum CacheValueStatus {
66    CACHE_STATUS_NOTFOUND,
67    CACHE_STATUS_ADVICE,
68    CACHE_STATUS_TOKEN
69  };
70
71  CacheValueStatus status() const;
72  const IssueAdviceInfo& issue_advice() const;
73  const std::string& token() const;
74  const base::Time& expiration_time() const;
75
76 private:
77  bool is_expired() const;
78
79  CacheValueStatus status_;
80  IssueAdviceInfo issue_advice_;
81  std::string token_;
82  base::Time expiration_time_;
83};
84
85class IdentityAPI : public BrowserContextKeyedAPI,
86                    public AccountTracker::Observer {
87 public:
88  typedef std::map<ExtensionTokenKey, IdentityTokenCacheValue> CachedTokens;
89
90  class ShutdownObserver {
91   public:
92    virtual void OnShutdown() = 0;
93  };
94
95  explicit IdentityAPI(content::BrowserContext* context);
96  virtual ~IdentityAPI();
97
98  // Request serialization queue for getAuthToken.
99  IdentityMintRequestQueue* mint_queue();
100
101  // Token cache
102  void SetCachedToken(const ExtensionTokenKey& key,
103                      const IdentityTokenCacheValue& token_data);
104  void EraseCachedToken(const std::string& extension_id,
105                        const std::string& token);
106  void EraseAllCachedTokens();
107  const IdentityTokenCacheValue& GetCachedToken(const ExtensionTokenKey& key);
108
109  const CachedTokens& GetAllCachedTokens();
110
111  void ReportAuthError(const GoogleServiceAuthError& error);
112  GoogleServiceAuthError GetAuthStatusForTest() const;
113
114  // BrowserContextKeyedAPI implementation.
115  virtual void Shutdown() OVERRIDE;
116  static BrowserContextKeyedAPIFactory<IdentityAPI>* GetFactoryInstance();
117
118  // AccountTracker::Observer implementation:
119  virtual void OnAccountAdded(const AccountIds& ids) OVERRIDE;
120  virtual void OnAccountRemoved(const AccountIds& ids) OVERRIDE;
121  virtual void OnAccountSignInChanged(const AccountIds& ids,
122                                      bool is_signed_in) OVERRIDE;
123
124  void AddShutdownObserver(ShutdownObserver* observer);
125  void RemoveShutdownObserver(ShutdownObserver* observer);
126
127 private:
128  friend class BrowserContextKeyedAPIFactory<IdentityAPI>;
129
130  // BrowserContextKeyedAPI implementation.
131  static const char* service_name() { return "IdentityAPI"; }
132  static const bool kServiceIsNULLWhileTesting = true;
133
134  content::BrowserContext* browser_context_;
135  IdentityMintRequestQueue mint_queue_;
136  CachedTokens token_cache_;
137  AccountTracker account_tracker_;
138  ObserverList<ShutdownObserver> shutdown_observer_list_;
139};
140
141template <>
142void BrowserContextKeyedAPIFactory<IdentityAPI>::DeclareFactoryDependencies();
143
144// identity.getAuthToken fetches an OAuth 2 function for the
145// caller. The request has three sub-flows: non-interactive,
146// interactive, and sign-in.
147//
148// In the non-interactive flow, getAuthToken requests a token from
149// GAIA. GAIA may respond with a token, an error, or "consent
150// required". In the consent required cases, getAuthToken proceeds to
151// the second, interactive phase.
152//
153// The interactive flow presents a scope approval dialog to the
154// user. If the user approves the request, a grant will be recorded on
155// the server, and an access token will be returned to the caller.
156//
157// In some cases we need to display a sign-in dialog. Normally the
158// profile will be signed in already, but if it turns out we need a
159// new login token, there is a sign-in flow. If that flow completes
160// successfully, getAuthToken proceeds to the non-interactive flow.
161class IdentityGetAuthTokenFunction : public ChromeAsyncExtensionFunction,
162                                     public GaiaWebAuthFlow::Delegate,
163                                     public IdentityMintRequestQueue::Request,
164                                     public OAuth2MintTokenFlow::Delegate,
165                                     public IdentitySigninFlow::Delegate,
166                                     public OAuth2TokenService::Consumer,
167                                     public IdentityAPI::ShutdownObserver {
168 public:
169  DECLARE_EXTENSION_FUNCTION("identity.getAuthToken",
170                             EXPERIMENTAL_IDENTITY_GETAUTHTOKEN);
171
172  IdentityGetAuthTokenFunction();
173
174 protected:
175  virtual ~IdentityGetAuthTokenFunction();
176
177 private:
178  FRIEND_TEST_ALL_PREFIXES(GetAuthTokenFunctionTest,
179                           ComponentWithChromeClientId);
180  FRIEND_TEST_ALL_PREFIXES(GetAuthTokenFunctionTest,
181                           ComponentWithNormalClientId);
182  FRIEND_TEST_ALL_PREFIXES(GetAuthTokenFunctionTest, InteractiveQueueShutdown);
183  FRIEND_TEST_ALL_PREFIXES(GetAuthTokenFunctionTest, NoninteractiveShutdown);
184  friend class MockGetAuthTokenFunction;
185
186  // ExtensionFunction:
187  virtual bool RunImpl() OVERRIDE;
188
189  // Helpers to report async function results to the caller.
190  void StartAsyncRun();
191  void CompleteAsyncRun(bool success);
192  void CompleteFunctionWithResult(const std::string& access_token);
193  void CompleteFunctionWithError(const std::string& error);
194
195  // Initiate/complete the sub-flows.
196  void StartSigninFlow();
197  void StartMintTokenFlow(IdentityMintRequestQueue::MintType type);
198  void CompleteMintTokenFlow();
199
200  // IdentityMintRequestQueue::Request implementation:
201  virtual void StartMintToken(IdentityMintRequestQueue::MintType type) OVERRIDE;
202
203  // OAuth2MintTokenFlow::Delegate implementation:
204  virtual void OnMintTokenSuccess(const std::string& access_token,
205                                  int time_to_live) OVERRIDE;
206  virtual void OnMintTokenFailure(
207      const GoogleServiceAuthError& error) OVERRIDE;
208  virtual void OnIssueAdviceSuccess(
209      const IssueAdviceInfo& issue_advice) OVERRIDE;
210
211  // IdentitySigninFlow::Delegate implementation:
212  virtual void SigninSuccess() OVERRIDE;
213  virtual void SigninFailed() OVERRIDE;
214
215  // GaiaWebAuthFlow::Delegate implementation:
216  virtual void OnGaiaFlowFailure(GaiaWebAuthFlow::Failure failure,
217                                 GoogleServiceAuthError service_error,
218                                 const std::string& oauth_error) OVERRIDE;
219  virtual void OnGaiaFlowCompleted(const std::string& access_token,
220                                   const std::string& expiration) OVERRIDE;
221
222  // OAuth2TokenService::Consumer implementation:
223  virtual void OnGetTokenSuccess(const OAuth2TokenService::Request* request,
224                                 const std::string& access_token,
225                                 const base::Time& expiration_time) OVERRIDE;
226  virtual void OnGetTokenFailure(const OAuth2TokenService::Request* request,
227                                 const GoogleServiceAuthError& error) OVERRIDE;
228
229  // IdentityAPI::ShutdownObserver implementation:
230  virtual void OnShutdown() OVERRIDE;
231
232  // Starts a login access token request.
233  virtual void StartLoginAccessTokenRequest();
234
235#if defined(OS_CHROMEOS)
236  // Starts a login access token request for device robot account. This method
237  // will be called only in enterprise kiosk mode in ChromeOS.
238  virtual void StartDeviceLoginAccessTokenRequest();
239#endif
240
241  // Starts a mint token request to GAIA.
242  void StartGaiaRequest(const std::string& login_access_token);
243
244  // Methods for invoking UI. Overridable for testing.
245  virtual void ShowLoginPopup();
246  virtual void ShowOAuthApprovalDialog(const IssueAdviceInfo& issue_advice);
247  // Caller owns the returned instance.
248  virtual OAuth2MintTokenFlow* CreateMintTokenFlow(
249      const std::string& login_access_token);
250
251  // Checks if there is a master login token to mint tokens for the extension.
252  virtual bool HasLoginToken() const;
253
254  // Maps OAuth2 protocol errors to an error message returned to the
255  // developer in chrome.runtime.lastError.
256  std::string MapOAuth2ErrorToDescription(const std::string& error);
257
258  std::string GetOAuth2ClientId() const;
259
260  bool should_prompt_for_scopes_;
261  IdentityMintRequestQueue::MintType mint_token_flow_type_;
262  scoped_ptr<OAuth2MintTokenFlow> mint_token_flow_;
263  OAuth2MintTokenFlow::Mode gaia_mint_token_mode_;
264  bool should_prompt_for_signin_;
265
266  scoped_ptr<ExtensionTokenKey> token_key_;
267  std::string oauth2_client_id_;
268  // When launched in interactive mode, and if there is no existing grant,
269  // a permissions prompt will be popped up to the user.
270  IssueAdviceInfo issue_advice_;
271  scoped_ptr<GaiaWebAuthFlow> gaia_web_auth_flow_;
272  scoped_ptr<IdentitySigninFlow> signin_flow_;
273  scoped_ptr<OAuth2TokenService::Request> login_token_request_;
274};
275
276class IdentityRemoveCachedAuthTokenFunction
277    : public ChromeSyncExtensionFunction {
278 public:
279  DECLARE_EXTENSION_FUNCTION("identity.removeCachedAuthToken",
280                             EXPERIMENTAL_IDENTITY_REMOVECACHEDAUTHTOKEN)
281  IdentityRemoveCachedAuthTokenFunction();
282
283 protected:
284  virtual ~IdentityRemoveCachedAuthTokenFunction();
285
286  // SyncExtensionFunction implementation:
287  virtual bool RunImpl() OVERRIDE;
288};
289
290class IdentityLaunchWebAuthFlowFunction : public ChromeAsyncExtensionFunction,
291                                          public WebAuthFlow::Delegate {
292 public:
293  DECLARE_EXTENSION_FUNCTION("identity.launchWebAuthFlow",
294                             EXPERIMENTAL_IDENTITY_LAUNCHWEBAUTHFLOW);
295
296  IdentityLaunchWebAuthFlowFunction();
297
298  // Tests may override extension_id.
299  void InitFinalRedirectURLPrefixForTest(const std::string& extension_id);
300
301 private:
302  virtual ~IdentityLaunchWebAuthFlowFunction();
303  virtual bool RunImpl() OVERRIDE;
304
305  // WebAuthFlow::Delegate implementation.
306  virtual void OnAuthFlowFailure(WebAuthFlow::Failure failure) OVERRIDE;
307  virtual void OnAuthFlowURLChange(const GURL& redirect_url) OVERRIDE;
308  virtual void OnAuthFlowTitleChange(const std::string& title) OVERRIDE {}
309
310  // Helper to initialize final URL prefix.
311  void InitFinalRedirectURLPrefix(const std::string& extension_id);
312
313  scoped_ptr<WebAuthFlow> auth_flow_;
314  GURL final_url_prefix_;
315};
316
317}  // namespace extensions
318
319#endif  // CHROME_BROWSER_EXTENSIONS_API_IDENTITY_IDENTITY_API_H_
320