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1 | <?php |
2 | /** |
3 | * Primary authentication provider interface |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License as published by |
7 | * the Free Software Foundation; either version 2 of the License, or |
8 | * (at your option) any later version. |
9 | * |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | * GNU General Public License for more details. |
14 | * |
15 | * You should have received a copy of the GNU General Public License along |
16 | * with this program; if not, write to the Free Software Foundation, Inc., |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
18 | * http://www.gnu.org/copyleft/gpl.html |
19 | * |
20 | * @file |
21 | * @ingroup Auth |
22 | */ |
23 | |
24 | namespace MediaWiki\Auth; |
25 | |
26 | use MediaWiki\User\User; |
27 | use StatusValue; |
28 | use Wikimedia\Rdbms\IDBAccessObject; |
29 | |
30 | /** |
31 | * A primary authentication provider is responsible for associating the submitted |
32 | * authentication data with a MediaWiki account. |
33 | * |
34 | * When multiple primary authentication providers are configured for a site, they |
35 | * act as alternatives; the first one that recognizes the data will handle it, |
36 | * and further primary providers are not called (although they all get a chance |
37 | * to prevent actions). |
38 | * |
39 | * For login, the PrimaryAuthenticationProvider takes form data and determines |
40 | * which authenticated user (if any) corresponds to that form data. It might |
41 | * do this on the basis of a username and password in that data, or by |
42 | * interacting with an external authentication service (e.g. using OpenID), |
43 | * or by some other mechanism. |
44 | * |
45 | * (A PrimaryAuthenticationProvider would not be appropriate for something like |
46 | * HTTP authentication, OAuth, or SSL client certificates where each HTTP |
47 | * request contains all the information needed to identify the user. In that |
48 | * case you'll want to be looking at a \MediaWiki\Session\SessionProvider |
49 | * instead.) |
50 | * |
51 | * For account creation, the PrimaryAuthenticationProvider takes form data and |
52 | * stores some authentication details which will allow it to verify a login by |
53 | * that user in the future. This might for example involve saving it in the |
54 | * database in a table that can be joined to the user table, or sending it to |
55 | * some external service for account creation, or authenticating the user with |
56 | * some remote service and then recording that the remote identity is linked to |
57 | * the local account. |
58 | * The creation of the local user (i.e. calling User::addToDatabase()) is handled |
59 | * by AuthManager once the primary authentication provider returns a PASS |
60 | * from begin/continueAccountCreation; do not try to do it yourself. |
61 | * |
62 | * For account linking, the PrimaryAuthenticationProvider verifies the user's |
63 | * identity at some external service (typically by redirecting the user and |
64 | * asking the external service to verify) and then records which local account |
65 | * is linked to which remote accounts. It should keep track of this and be able |
66 | * to enumerate linked accounts via getAuthenticationRequests(ACTION_REMOVE). |
67 | * |
68 | * This interface also provides methods for changing authentication data such |
69 | * as passwords, and callbacks that are invoked after login / account creation |
70 | * / account linking succeeded or failed. |
71 | * |
72 | * @ingroup Auth |
73 | * @since 1.27 |
74 | * @see https://www.mediawiki.org/wiki/Manual:SessionManager_and_AuthManager |
75 | */ |
76 | interface PrimaryAuthenticationProvider extends AuthenticationProvider { |
77 | /** Provider can create accounts */ |
78 | public const TYPE_CREATE = 'create'; |
79 | /** Provider can link to existing accounts elsewhere */ |
80 | public const TYPE_LINK = 'link'; |
81 | /** Provider cannot create or link to accounts */ |
82 | public const TYPE_NONE = 'none'; |
83 | |
84 | /** |
85 | * @inheritDoc |
86 | * |
87 | * Of the requests returned by this method, exactly one should have |
88 | * {@link AuthenticationRequest::$required} set to REQUIRED. |
89 | */ |
90 | public function getAuthenticationRequests( $action, array $options ); |
91 | |
92 | /** |
93 | * Start an authentication flow |
94 | * |
95 | * @param AuthenticationRequest[] $reqs |
96 | * @return AuthenticationResponse Expected responses: |
97 | * - PASS: The user is authenticated. Secondary providers will now run. |
98 | * - FAIL: The user is not authenticated. Fail the authentication process. |
99 | * - ABSTAIN: These $reqs are not handled. Some other primary provider may handle it. |
100 | * - UI: The $reqs are accepted, no other primary provider will run. |
101 | * Additional AuthenticationRequests are needed to complete the process. |
102 | * - REDIRECT: The $reqs are accepted, no other primary provider will run. |
103 | * Redirection to a third party is needed to complete the process. |
104 | */ |
105 | public function beginPrimaryAuthentication( array $reqs ); |
106 | |
107 | /** |
108 | * Continue an authentication flow |
109 | * @param AuthenticationRequest[] $reqs |
110 | * @return AuthenticationResponse Expected responses: |
111 | * - PASS: The user is authenticated. Secondary providers will now run. |
112 | * - FAIL: The user is not authenticated. Fail the authentication process. |
113 | * - UI: Additional AuthenticationRequests are needed to complete the process. |
114 | * - REDIRECT: Redirection to a third party is needed to complete the process. |
115 | */ |
116 | public function continuePrimaryAuthentication( array $reqs ); |
117 | |
118 | /** |
119 | * Post-login callback |
120 | * |
121 | * This will be called at the end of any login attempt, regardless of whether this provider was |
122 | * the one that handled it. It will not be called for unfinished login attempts that fail by |
123 | * the session timing out. |
124 | * |
125 | * @param User|null $user User that was attempted to be logged in, if known. |
126 | * This may become a "UserValue" in the future, or User may be refactored |
127 | * into such. |
128 | * @param AuthenticationResponse $response Authentication response that will be returned |
129 | * (PASS or FAIL) |
130 | */ |
131 | public function postAuthentication( $user, AuthenticationResponse $response ); |
132 | |
133 | /** |
134 | * Test whether the named user exists |
135 | * |
136 | * Single-sign-on providers can use this to reserve a username for autocreation. |
137 | * |
138 | * @param string $username MediaWiki username |
139 | * @param int $flags Bitfield of IDBAccessObject::READ_* constants |
140 | * @return bool |
141 | */ |
142 | public function testUserExists( $username, $flags = IDBAccessObject::READ_NORMAL ); |
143 | |
144 | /** |
145 | * Test whether the named user can authenticate with this provider |
146 | * |
147 | * Should return true if the provider has any data for this user which can be used to |
148 | * authenticate it, even if the user is temporarily prevented from authentication somehow. |
149 | * |
150 | * @param string $username MediaWiki username |
151 | * @return bool |
152 | */ |
153 | public function testUserCanAuthenticate( $username ); |
154 | |
155 | /** |
156 | * Normalize the username for authentication |
157 | * |
158 | * Any two inputs that would result in the same user being authenticated |
159 | * should return the same string here, while inputs that would result in |
160 | * different users should return different strings. |
161 | * |
162 | * If possible, the best thing to do here is to return the canonicalized |
163 | * name of the local user account that would be used. If not, return |
164 | * something that would be invalid as a local username (e.g. wrap an email |
165 | * address in "<>", or append "#servicename" to the username passed to a |
166 | * third-party service). |
167 | * |
168 | * If the provider doesn't use a username at all in its |
169 | * AuthenticationRequests, return null. If the name is syntactically |
170 | * invalid, it's probably best to return null. |
171 | * |
172 | * @param string $username |
173 | * @return string|null |
174 | */ |
175 | public function providerNormalizeUsername( $username ); |
176 | |
177 | /** |
178 | * Revoke the user's credentials |
179 | * |
180 | * This may cause the user to no longer exist for the provider, or the user |
181 | * may continue to exist in a "disabled" state. |
182 | * |
183 | * The intention is that the named account will never again be usable for |
184 | * normal login (i.e. there is no way to undo the revocation of access). |
185 | * |
186 | * @param string $username |
187 | */ |
188 | public function providerRevokeAccessForUser( $username ); |
189 | |
190 | /** |
191 | * Determine whether a property can change |
192 | * @see AuthManager::allowsPropertyChange() |
193 | * @param string $property |
194 | * @return bool |
195 | */ |
196 | public function providerAllowsPropertyChange( $property ); |
197 | |
198 | /** |
199 | * Validate a change of authentication data (e.g. passwords) |
200 | * |
201 | * Return StatusValue::newGood( 'ignored' ) if you don't support this |
202 | * AuthenticationRequest type. |
203 | * |
204 | * @param AuthenticationRequest $req |
205 | * @param bool $checkData If false, $req hasn't been loaded from the |
206 | * submission so checks on user-submitted fields should be skipped. |
207 | * $req->username is considered user-submitted for this purpose, even |
208 | * if it cannot be changed via $req->loadFromSubmission. |
209 | * @return StatusValue |
210 | */ |
211 | public function providerAllowsAuthenticationDataChange( |
212 | AuthenticationRequest $req, $checkData = true |
213 | ); |
214 | |
215 | /** |
216 | * Change or remove authentication data (e.g. passwords) |
217 | * |
218 | * If $req was returned for AuthManager::ACTION_CHANGE, the corresponding |
219 | * credentials should result in a successful login in the future. |
220 | * |
221 | * If $req was returned for AuthManager::ACTION_REMOVE, the corresponding |
222 | * credentials should no longer result in a successful login. |
223 | * |
224 | * It can be assumed that providerAllowsAuthenticationDataChange with $checkData === true |
225 | * was called before this, and passed. This method should never fail (other than throwing an |
226 | * exception). |
227 | * |
228 | * @param AuthenticationRequest $req |
229 | */ |
230 | public function providerChangeAuthenticationData( AuthenticationRequest $req ); |
231 | |
232 | /** |
233 | * Fetch the account-creation type |
234 | * @return string One of the TYPE_* constants |
235 | */ |
236 | public function accountCreationType(); |
237 | |
238 | /** |
239 | * Determine whether an account creation may begin |
240 | * |
241 | * Called from AuthManager::beginAccountCreation() |
242 | * |
243 | * @note No need to test if the account exists, AuthManager checks that |
244 | * @param User $user User being created (not added to the database yet). |
245 | * This may become a "UserValue" in the future, or User may be refactored |
246 | * into such. |
247 | * @param User $creator User doing the creation. This may become a |
248 | * "UserValue" in the future, or User may be refactored into such. |
249 | * @param AuthenticationRequest[] $reqs |
250 | * @return StatusValue |
251 | */ |
252 | public function testForAccountCreation( $user, $creator, array $reqs ); |
253 | |
254 | /** |
255 | * Start an account creation flow |
256 | * @param User $user User being created (not added to the database yet). |
257 | * This may become a "UserValue" in the future, or User may be refactored |
258 | * into such. |
259 | * @param User $creator User doing the creation. This may become a |
260 | * "UserValue" in the future, or User may be refactored into such. |
261 | * @param AuthenticationRequest[] $reqs |
262 | * @return AuthenticationResponse Expected responses: |
263 | * - PASS: The user may be created. Secondary providers will now run. |
264 | * - FAIL: The user may not be created. Fail the creation process. |
265 | * - ABSTAIN: These $reqs are not handled. Some other primary provider may handle it. |
266 | * - UI: The $reqs are accepted, no other primary provider will run. |
267 | * Additional AuthenticationRequests are needed to complete the process. |
268 | * - REDIRECT: The $reqs are accepted, no other primary provider will run. |
269 | * Redirection to a third party is needed to complete the process. |
270 | */ |
271 | public function beginPrimaryAccountCreation( $user, $creator, array $reqs ); |
272 | |
273 | /** |
274 | * Continue an account creation flow |
275 | * @param User $user User being created (not added to the database yet). |
276 | * This may become a "UserValue" in the future, or User may be refactored |
277 | * into such. |
278 | * @param User $creator User doing the creation. This may become a |
279 | * "UserValue" in the future, or User may be refactored into such. |
280 | * @param AuthenticationRequest[] $reqs |
281 | * @return AuthenticationResponse Expected responses: |
282 | * - PASS: The user may be created. Secondary providers will now run. |
283 | * - FAIL: The user may not be created. Fail the creation process. |
284 | * - UI: Additional AuthenticationRequests are needed to complete the process. |
285 | * - REDIRECT: Redirection to a third party is needed to complete the process. |
286 | */ |
287 | public function continuePrimaryAccountCreation( $user, $creator, array $reqs ); |
288 | |
289 | /** |
290 | * Post-creation callback |
291 | * |
292 | * Called after the user is added to the database, before secondary |
293 | * authentication providers are run. Only called if this provider was the one that issued |
294 | * a PASS. |
295 | * |
296 | * @param User $user User being created (has been added to the database now). |
297 | * This may become a "UserValue" in the future, or User may be refactored |
298 | * into such. |
299 | * @param User $creator User doing the creation. This may become a |
300 | * "UserValue" in the future, or User may be refactored into such. |
301 | * @param AuthenticationResponse $response PASS response returned earlier |
302 | * @return string|null 'newusers' log subtype to use for logging the |
303 | * account creation. If null, either 'create' or 'create2' will be used |
304 | * depending on $creator. |
305 | */ |
306 | public function finishAccountCreation( $user, $creator, AuthenticationResponse $response ); |
307 | |
308 | /** |
309 | * Post-creation callback |
310 | * |
311 | * This will be called at the end of any account creation attempt, regardless of whether this |
312 | * provider was the one that handled it. It will not be called if the account creation process |
313 | * results in a session timeout (possibly after a successful user creation, while a secondary |
314 | * provider is waiting for a response). |
315 | * |
316 | * @param User $user User that was attempted to be created. |
317 | * This may become a "UserValue" in the future, or User may be refactored |
318 | * into such. |
319 | * @param User $creator User doing the creation. This may become a |
320 | * "UserValue" in the future, or User may be refactored into such. |
321 | * @param AuthenticationResponse $response Authentication response that will be returned |
322 | * (PASS or FAIL) |
323 | */ |
324 | public function postAccountCreation( $user, $creator, AuthenticationResponse $response ); |
325 | |
326 | /** |
327 | * Determine whether an account may be created |
328 | * |
329 | * @param User $user User being created (not added to the database yet). |
330 | * This may become a "UserValue" in the future, or User may be refactored |
331 | * into such. |
332 | * @param bool|string $autocreate False if this is not an auto-creation, or |
333 | * the source of the auto-creation passed to AuthManager::autoCreateUser(). |
334 | * @param array $options |
335 | * - flags: (int) Bitfield of IDBAccessObject::READ_* constants, default IDBAccessObject::READ_NORMAL |
336 | * - creating: (bool) If false (or missing), this call is only testing if |
337 | * a user could be created. If set, this is for actually creating an account. |
338 | * If set and $autocreate is false, it's guaranteed to be followed by a call to |
339 | * testForAccountCreation(). In this case, the provider might return |
340 | * StatusValue::newGood() here and let the later call to |
341 | * testForAccountCreation() do a more thorough test. |
342 | * - canAlwaysAutocreate: (bool) If true the session provider is exempt from |
343 | * autocreate user permissions checks. |
344 | * @return StatusValue |
345 | */ |
346 | public function testUserForCreation( $user, $autocreate, array $options = [] ); |
347 | |
348 | /** |
349 | * Post-auto-creation callback |
350 | * @param User $user User being created (has been added to the database now). |
351 | * This may become a "UserValue" in the future, or User may be refactored |
352 | * into such. |
353 | * @param string $source The source of the auto-creation passed to |
354 | * AuthManager::autoCreateUser(). |
355 | */ |
356 | public function autoCreatedAccount( $user, $source ); |
357 | |
358 | /** |
359 | * Start linking an account to an existing user |
360 | * @param User $user User being linked. |
361 | * This may become a "UserValue" in the future, or User may be refactored |
362 | * into such. |
363 | * @param AuthenticationRequest[] $reqs |
364 | * @return AuthenticationResponse Expected responses: |
365 | * - PASS: The user is linked. |
366 | * - FAIL: The user is not linked. Fail the linking process. |
367 | * - ABSTAIN: These $reqs are not handled. Some other primary provider may handle it. |
368 | * - UI: The $reqs are accepted, no other primary provider will run. |
369 | * Additional AuthenticationRequests are needed to complete the process. |
370 | * - REDIRECT: The $reqs are accepted, no other primary provider will run. |
371 | * Redirection to a third party is needed to complete the process. |
372 | */ |
373 | public function beginPrimaryAccountLink( $user, array $reqs ); |
374 | |
375 | /** |
376 | * Continue linking an account to an existing user |
377 | * @param User $user User being linked. |
378 | * This may become a "UserValue" in the future, or User may be refactored |
379 | * into such. |
380 | * @param AuthenticationRequest[] $reqs |
381 | * @return AuthenticationResponse Expected responses: |
382 | * - PASS: The user is linked. |
383 | * - FAIL: The user is not linked. Fail the linking process. |
384 | * - UI: Additional AuthenticationRequests are needed to complete the process. |
385 | * - REDIRECT: Redirection to a third party is needed to complete the process. |
386 | */ |
387 | public function continuePrimaryAccountLink( $user, array $reqs ); |
388 | |
389 | /** |
390 | * Post-link callback |
391 | * |
392 | * This will be called at the end of any account linking attempt, regardless of whether this |
393 | * provider was the one that handled it. |
394 | * |
395 | * @param User $user User that was attempted to be linked. |
396 | * This may become a "UserValue" in the future, or User may be refactored |
397 | * into such. |
398 | * @param AuthenticationResponse $response Authentication response that will be returned |
399 | * (PASS or FAIL) |
400 | */ |
401 | public function postAccountLink( $user, AuthenticationResponse $response ); |
402 | |
403 | } |