Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/flask_jwt_extended/jwt_manager.py: 77%

1import datetime 

2from typing import Any 

3from typing import Callable 

4from typing import Optional 

5 

6import jwt 

7from flask import Flask 

8from jwt import DecodeError 

9from jwt import ExpiredSignatureError 

10from jwt import InvalidAudienceError 

11from jwt import InvalidIssuerError 

12from jwt import InvalidTokenError 

13from jwt import MissingRequiredClaimError 

14 

15from flask_jwt_extended.config import config 

16from flask_jwt_extended.default_callbacks import default_additional_claims_callback 

17from flask_jwt_extended.default_callbacks import default_blocklist_callback 

18from flask_jwt_extended.default_callbacks import default_decode_key_callback 

19from flask_jwt_extended.default_callbacks import default_encode_key_callback 

20from flask_jwt_extended.default_callbacks import default_expired_token_callback 

21from flask_jwt_extended.default_callbacks import default_invalid_token_callback 

22from flask_jwt_extended.default_callbacks import default_jwt_headers_callback 

23from flask_jwt_extended.default_callbacks import default_needs_fresh_token_callback 

24from flask_jwt_extended.default_callbacks import default_revoked_token_callback 

25from flask_jwt_extended.default_callbacks import default_token_verification_callback 

26from flask_jwt_extended.default_callbacks import ( 

27 default_token_verification_failed_callback, 

28) 

29from flask_jwt_extended.default_callbacks import default_unauthorized_callback 

30from flask_jwt_extended.default_callbacks import default_user_identity_callback 

31from flask_jwt_extended.default_callbacks import default_user_lookup_error_callback 

32from flask_jwt_extended.exceptions import CSRFError 

33from flask_jwt_extended.exceptions import FreshTokenRequired 

34from flask_jwt_extended.exceptions import InvalidHeaderError 

35from flask_jwt_extended.exceptions import InvalidQueryParamError 

36from flask_jwt_extended.exceptions import JWTDecodeError 

37from flask_jwt_extended.exceptions import NoAuthorizationError 

38from flask_jwt_extended.exceptions import RevokedTokenError 

39from flask_jwt_extended.exceptions import UserClaimsVerificationError 

40from flask_jwt_extended.exceptions import UserLookupError 

41from flask_jwt_extended.exceptions import WrongTokenError 

42from flask_jwt_extended.tokens import _decode_jwt 

43from flask_jwt_extended.tokens import _encode_jwt 

44from flask_jwt_extended.typing import ExpiresDelta 

45from flask_jwt_extended.typing import Fresh 

46from flask_jwt_extended.utils import current_user_context_processor 

47 

48 

49class JWTManager(object): 

50 """ 

51 An object used to hold JWT settings and callback functions for the 

52 Flask-JWT-Extended extension. 

53 

54 Instances of :class:`JWTManager` are *not* bound to specific apps, so 

55 you can create one in the main body of your code and then bind it 

56 to your app in a factory function. 

57 """ 

58 

59 def __init__( 

60 self, app: Optional[Flask] = None, add_context_processor: bool = False 

61 ) -> None: 

62 """ 

63 Create the JWTManager instance. You can either pass a flask application 

64 in directly here to register this extension with the flask app, or 

65 call init_app after creating this object (in a factory pattern). 

66 

67 :param app: 

68 The Flask Application object 

69 :param add_context_processor: 

70 Controls if `current_user` is should be added to flasks template 

71 context (and thus be available for use in Jinja templates). Defaults 

72 to ``False``. 

73 """ 

74 # Register the default error handler callback methods. These can be 

75 # overridden with the appropriate loader decorators 

76 self._decode_key_callback = default_decode_key_callback 

77 self._encode_key_callback = default_encode_key_callback 

78 self._expired_token_callback = default_expired_token_callback 

79 self._invalid_token_callback = default_invalid_token_callback 

80 self._jwt_additional_header_callback = default_jwt_headers_callback 

81 self._needs_fresh_token_callback = default_needs_fresh_token_callback 

82 self._revoked_token_callback = default_revoked_token_callback 

83 self._token_in_blocklist_callback = default_blocklist_callback 

84 self._token_verification_callback = default_token_verification_callback 

85 self._unauthorized_callback = default_unauthorized_callback 

86 self._user_claims_callback = default_additional_claims_callback 

87 self._user_identity_callback = default_user_identity_callback 

88 self._user_lookup_callback: Optional[Callable] = None 

89 self._user_lookup_error_callback = default_user_lookup_error_callback 

90 self._token_verification_failed_callback = ( 

91 default_token_verification_failed_callback 

92 ) 

93 

94 # Register this extension with the flask app now (if it is provided) 

95 if app is not None: 

96 self.init_app(app, add_context_processor) 

97 

98 def init_app(self, app: Flask, add_context_processor: bool = False) -> None: 

99 """ 

100 Register this extension with the flask app. 

101 

102 :param app: 

103 The Flask Application object 

104 :param add_context_processor: 

105 Controls if `current_user` is should be added to flasks template 

106 context (and thus be available for use in Jinja templates). Defaults 

107 to ``False``. 

108 """ 

109 # Save this so we can use it later in the extension 

110 if not hasattr(app, "extensions"): # pragma: no cover 

111 app.extensions = {} 

112 app.extensions["flask-jwt-extended"] = self 

113 

114 if add_context_processor: 

115 app.context_processor(current_user_context_processor) 

116 

117 # Set all the default configurations for this extension 

118 self._set_default_configuration_options(app) 

119 self._set_error_handler_callbacks(app) 

120 

121 def _set_error_handler_callbacks(self, app: Flask) -> None: 

122 @app.errorhandler(CSRFError) 

123 def handle_csrf_error(e): 

124 return self._unauthorized_callback(str(e)) 

125 

126 @app.errorhandler(DecodeError) 

127 def handle_decode_error(e): 

128 return self._invalid_token_callback(str(e)) 

129 

130 @app.errorhandler(ExpiredSignatureError) 

131 def handle_expired_error(e): 

132 return self._expired_token_callback(e.jwt_header, e.jwt_data) 

133 

134 @app.errorhandler(FreshTokenRequired) 

135 def handle_fresh_token_required(e): 

136 return self._needs_fresh_token_callback(e.jwt_header, e.jwt_data) 

137 

138 @app.errorhandler(MissingRequiredClaimError) 

139 def handle_missing_required_claim_error(e): 

140 return self._invalid_token_callback(str(e)) 

141 

142 @app.errorhandler(InvalidAudienceError) 

143 def handle_invalid_audience_error(e): 

144 return self._invalid_token_callback(str(e)) 

145 

146 @app.errorhandler(InvalidIssuerError) 

147 def handle_invalid_issuer_error(e): 

148 return self._invalid_token_callback(str(e)) 

149 

150 @app.errorhandler(InvalidHeaderError) 

151 def handle_invalid_header_error(e): 

152 return self._invalid_token_callback(str(e)) 

153 

154 @app.errorhandler(InvalidTokenError) 

155 def handle_invalid_token_error(e): 

156 return self._invalid_token_callback(str(e)) 

157 

158 @app.errorhandler(JWTDecodeError) 

159 def handle_jwt_decode_error(e): 

160 return self._invalid_token_callback(str(e)) 

161 

162 @app.errorhandler(NoAuthorizationError) 

163 def handle_auth_error(e): 

164 return self._unauthorized_callback(str(e)) 

165 

166 @app.errorhandler(InvalidQueryParamError) 

167 def handle_invalid_query_param_error(e): 

168 return self._invalid_token_callback(str(e)) 

169 

170 @app.errorhandler(RevokedTokenError) 

171 def handle_revoked_token_error(e): 

172 return self._revoked_token_callback(e.jwt_header, e.jwt_data) 

173 

174 @app.errorhandler(UserClaimsVerificationError) 

175 def handle_failed_token_verification(e): 

176 return self._token_verification_failed_callback(e.jwt_header, e.jwt_data) 

177 

178 @app.errorhandler(UserLookupError) 

179 def handler_user_lookup_error(e): 

180 return self._user_lookup_error_callback(e.jwt_header, e.jwt_data) 

181 

182 @app.errorhandler(WrongTokenError) 

183 def handle_wrong_token_error(e): 

184 return self._invalid_token_callback(str(e)) 

185 

186 @staticmethod 

187 def _set_default_configuration_options(app: Flask) -> None: 

188 app.config.setdefault( 

189 "JWT_ACCESS_TOKEN_EXPIRES", datetime.timedelta(minutes=15) 

190 ) 

191 app.config.setdefault("JWT_ACCESS_COOKIE_NAME", "access_token_cookie") 

192 app.config.setdefault("JWT_ACCESS_COOKIE_PATH", "/") 

193 app.config.setdefault("JWT_ACCESS_CSRF_COOKIE_NAME", "csrf_access_token") 

194 app.config.setdefault("JWT_ACCESS_CSRF_COOKIE_PATH", "/") 

195 app.config.setdefault("JWT_ACCESS_CSRF_FIELD_NAME", "csrf_token") 

196 app.config.setdefault("JWT_ACCESS_CSRF_HEADER_NAME", "X-CSRF-TOKEN") 

197 app.config.setdefault("JWT_ALGORITHM", "HS256") 

198 app.config.setdefault("JWT_COOKIE_CSRF_PROTECT", True) 

199 app.config.setdefault("JWT_COOKIE_DOMAIN", None) 

200 app.config.setdefault("JWT_COOKIE_SAMESITE", None) 

201 app.config.setdefault("JWT_COOKIE_SECURE", False) 

202 app.config.setdefault("JWT_CSRF_CHECK_FORM", False) 

203 app.config.setdefault("JWT_CSRF_IN_COOKIES", True) 

204 app.config.setdefault("JWT_CSRF_METHODS", ["POST", "PUT", "PATCH", "DELETE"]) 

205 app.config.setdefault("JWT_DECODE_ALGORITHMS", None) 

206 app.config.setdefault("JWT_DECODE_AUDIENCE", None) 

207 app.config.setdefault("JWT_DECODE_ISSUER", None) 

208 app.config.setdefault("JWT_DECODE_LEEWAY", 0) 

209 app.config.setdefault("JWT_ENCODE_AUDIENCE", None) 

210 app.config.setdefault("JWT_ENCODE_ISSUER", None) 

211 app.config.setdefault("JWT_ERROR_MESSAGE_KEY", "msg") 

212 app.config.setdefault("JWT_HEADER_NAME", "Authorization") 

213 app.config.setdefault("JWT_HEADER_TYPE", "Bearer") 

214 app.config.setdefault("JWT_IDENTITY_CLAIM", "sub") 

215 app.config.setdefault("JWT_JSON_KEY", "access_token") 

216 app.config.setdefault("JWT_PRIVATE_KEY", None) 

217 app.config.setdefault("JWT_PUBLIC_KEY", None) 

218 app.config.setdefault("JWT_QUERY_STRING_NAME", "jwt") 

219 app.config.setdefault("JWT_QUERY_STRING_VALUE_PREFIX", "") 

220 app.config.setdefault("JWT_REFRESH_COOKIE_NAME", "refresh_token_cookie") 

221 app.config.setdefault("JWT_REFRESH_COOKIE_PATH", "/") 

222 app.config.setdefault("JWT_REFRESH_CSRF_COOKIE_NAME", "csrf_refresh_token") 

223 app.config.setdefault("JWT_REFRESH_CSRF_COOKIE_PATH", "/") 

224 app.config.setdefault("JWT_REFRESH_CSRF_FIELD_NAME", "csrf_token") 

225 app.config.setdefault("JWT_REFRESH_CSRF_HEADER_NAME", "X-CSRF-TOKEN") 

226 app.config.setdefault("JWT_REFRESH_JSON_KEY", "refresh_token") 

227 app.config.setdefault("JWT_REFRESH_TOKEN_EXPIRES", datetime.timedelta(days=30)) 

228 app.config.setdefault("JWT_SECRET_KEY", None) 

229 app.config.setdefault("JWT_SESSION_COOKIE", True) 

230 app.config.setdefault("JWT_TOKEN_LOCATION", ("headers",)) 

231 app.config.setdefault("JWT_ENCODE_NBF", True) 

232 

233 def additional_claims_loader(self, callback: Callable) -> Callable: 

234 """ 

235 This decorator sets the callback function used to add additional claims 

236 when creating a JWT. The claims returned by this function will be merged 

237 with any claims passed in via the ``additional_claims`` argument to 

238 :func:`~flask_jwt_extended.create_access_token` or 

239 :func:`~flask_jwt_extended.create_refresh_token`. 

240 

241 The decorated function must take **one** argument. 

242 

243 The argument is the identity that was used when creating a JWT. 

244 

245 The decorated function must return a dictionary of claims to add to the JWT. 

246 """ 

247 self._user_claims_callback = callback 

248 return callback 

249 

250 def additional_headers_loader(self, callback: Callable) -> Callable: 

251 """ 

252 This decorator sets the callback function used to add additional headers 

253 when creating a JWT. The headers returned by this function will be merged 

254 with any headers passed in via the ``additional_headers`` argument to 

255 :func:`~flask_jwt_extended.create_access_token` or 

256 :func:`~flask_jwt_extended.create_refresh_token`. 

257 

258 The decorated function must take **one** argument. 

259 

260 The argument is the identity that was used when creating a JWT. 

261 

262 The decorated function must return a dictionary of headers to add to the JWT. 

263 """ 

264 self._jwt_additional_header_callback = callback 

265 return callback 

266 

267 def decode_key_loader(self, callback: Callable) -> Callable: 

268 """ 

269 This decorator sets the callback function for dynamically setting the JWT 

270 decode key based on the **UNVERIFIED** contents of the token. Think 

271 carefully before using this functionality, in most cases you probably 

272 don't need it. 

273 

274 The decorated function must take **two** arguments. 

275 

276 The first argument is a dictionary containing the header data of the 

277 unverified JWT. 

278 

279 The second argument is a dictionary containing the payload data of the 

280 unverified JWT. 

281 

282 The decorated function must return a *string* that is used to decode and 

283 verify the token. 

284 """ 

285 self._decode_key_callback = callback 

286 return callback 

287 

288 def encode_key_loader(self, callback: Callable) -> Callable: 

289 """ 

290 This decorator sets the callback function for dynamically setting the JWT 

291 encode key based on the tokens identity. Think carefully before using this 

292 functionality, in most cases you probably don't need it. 

293 

294 The decorated function must take **one** argument. 

295 

296 The argument is the identity used to create this JWT. 

297 

298 The decorated function must return a *string* which is the secrete key used to 

299 encode the JWT. 

300 """ 

301 self._encode_key_callback = callback 

302 return callback 

303 

304 def expired_token_loader(self, callback: Callable) -> Callable: 

305 """ 

306 This decorator sets the callback function for returning a custom 

307 response when an expired JWT is encountered. 

308 

309 The decorated function must take **two** arguments. 

310 

311 The first argument is a dictionary containing the header data of the JWT. 

312 

313 The second argument is a dictionary containing the payload data of the JWT. 

314 

315 The decorated function must return a Flask Response. 

316 """ 

317 self._expired_token_callback = callback 

318 return callback 

319 

320 def invalid_token_loader(self, callback: Callable) -> Callable: 

321 """ 

322 This decorator sets the callback function for returning a custom 

323 response when an invalid JWT is encountered. 

324 

325 This decorator sets the callback function that will be used if an 

326 invalid JWT attempts to access a protected endpoint. 

327 

328 The decorated function must take **one** argument. 

329 

330 The argument is a string which contains the reason why a token is invalid. 

331 

332 The decorated function must return a Flask Response. 

333 """ 

334 self._invalid_token_callback = callback 

335 return callback 

336 

337 def needs_fresh_token_loader(self, callback: Callable) -> Callable: 

338 """ 

339 This decorator sets the callback function for returning a custom 

340 response when a valid and non-fresh token is used on an endpoint 

341 that is marked as ``fresh=True``. 

342 

343 The decorated function must take **two** arguments. 

344 

345 The first argument is a dictionary containing the header data of the JWT. 

346 

347 The second argument is a dictionary containing the payload data of the JWT. 

348 

349 The decorated function must return a Flask Response. 

350 """ 

351 self._needs_fresh_token_callback = callback 

352 return callback 

353 

354 def revoked_token_loader(self, callback: Callable) -> Callable: 

355 """ 

356 This decorator sets the callback function for returning a custom 

357 response when a revoked token is encountered. 

358 

359 The decorated function must take **two** arguments. 

360 

361 The first argument is a dictionary containing the header data of the JWT. 

362 

363 The second argument is a dictionary containing the payload data of the JWT. 

364 

365 The decorated function must return a Flask Response. 

366 """ 

367 self._revoked_token_callback = callback 

368 return callback 

369 

370 def token_in_blocklist_loader(self, callback: Callable) -> Callable: 

371 """ 

372 This decorator sets the callback function used to check if a JWT has 

373 been revoked. 

374 

375 The decorated function must take **two** arguments. 

376 

377 The first argument is a dictionary containing the header data of the JWT. 

378 

379 The second argument is a dictionary containing the payload data of the JWT. 

380 

381 The decorated function must be return ``True`` if the token has been 

382 revoked, ``False`` otherwise. 

383 """ 

384 self._token_in_blocklist_callback = callback 

385 return callback 

386 

387 def token_verification_failed_loader(self, callback: Callable) -> Callable: 

388 """ 

389 This decorator sets the callback function used to return a custom 

390 response when the claims verification check fails. 

391 

392 The decorated function must take **two** arguments. 

393 

394 The first argument is a dictionary containing the header data of the JWT. 

395 

396 The second argument is a dictionary containing the payload data of the JWT. 

397 

398 The decorated function must return a Flask Response. 

399 """ 

400 self._token_verification_failed_callback = callback 

401 return callback 

402 

403 def token_verification_loader(self, callback: Callable) -> Callable: 

404 """ 

405 This decorator sets the callback function used for custom verification 

406 of a valid JWT. 

407 

408 The decorated function must take **two** arguments. 

409 

410 The first argument is a dictionary containing the header data of the JWT. 

411 

412 The second argument is a dictionary containing the payload data of the JWT. 

413 

414 The decorated function must return ``True`` if the token is valid, or 

415 ``False`` otherwise. 

416 """ 

417 self._token_verification_callback = callback 

418 return callback 

419 

420 def unauthorized_loader(self, callback: Callable) -> Callable: 

421 """ 

422 This decorator sets the callback function used to return a custom 

423 response when no JWT is present. 

424 

425 The decorated function must take **one** argument. 

426 

427 The argument is a string that explains why the JWT could not be found. 

428 

429 The decorated function must return a Flask Response. 

430 """ 

431 self._unauthorized_callback = callback 

432 return callback 

433 

434 def user_identity_loader(self, callback: Callable) -> Callable: 

435 """ 

436 This decorator sets the callback function used to convert an identity to 

437 a JSON serializable format when creating JWTs. This is useful for 

438 using objects (such as SQLAlchemy instances) as the identity when 

439 creating your tokens. 

440 

441 The decorated function must take **one** argument. 

442 

443 The argument is the identity that was used when creating a JWT. 

444 

445 The decorated function must return JSON serializable data. 

446 """ 

447 self._user_identity_callback = callback 

448 return callback 

449 

450 def user_lookup_loader(self, callback: Callable) -> Callable: 

451 """ 

452 This decorator sets the callback function used to convert a JWT into 

453 a python object that can be used in a protected endpoint. This is useful 

454 for automatically loading a SQLAlchemy instance based on the contents 

455 of the JWT. 

456 

457 The object returned from this function can be accessed via 

458 :attr:`~flask_jwt_extended.current_user` or 

459 :meth:`~flask_jwt_extended.get_current_user` 

460 

461 The decorated function must take **two** arguments. 

462 

463 The first argument is a dictionary containing the header data of the JWT. 

464 

465 The second argument is a dictionary containing the payload data of the JWT. 

466 

467 The decorated function can return any python object, which can then be 

468 accessed in a protected endpoint. If an object cannot be loaded, for 

469 example if a user has been deleted from your database, ``None`` must be 

470 returned to indicate that an error occurred loading the user. 

471 """ 

472 self._user_lookup_callback = callback 

473 return callback 

474 

475 def user_lookup_error_loader(self, callback: Callable) -> Callable: 

476 """ 

477 This decorator sets the callback function used to return a custom 

478 response when loading a user via 

479 :meth:`~flask_jwt_extended.JWTManager.user_lookup_loader` fails. 

480 

481 The decorated function must take **two** arguments. 

482 

483 The first argument is a dictionary containing the header data of the JWT. 

484 

485 The second argument is a dictionary containing the payload data of the JWT. 

486 

487 The decorated function must return a Flask Response. 

488 """ 

489 self._user_lookup_error_callback = callback 

490 return callback 

491 

492 def _encode_jwt_from_config( 

493 self, 

494 identity: Any, 

495 token_type: str, 

496 claims=None, 

497 fresh: Fresh = False, 

498 expires_delta: Optional[ExpiresDelta] = None, 

499 headers=None, 

500 ) -> str: 

501 header_overrides = self._jwt_additional_header_callback(identity) 

502 if headers is not None: 

503 header_overrides.update(headers) 

504 

505 claim_overrides = self._user_claims_callback(identity) 

506 if claims is not None: 

507 claim_overrides.update(claims) 

508 

509 if expires_delta is None: 

510 if token_type == "access": 

511 expires_delta = config.access_expires 

512 else: 

513 expires_delta = config.refresh_expires 

514 

515 return _encode_jwt( 

516 algorithm=config.algorithm, 

517 audience=config.encode_audience, 

518 claim_overrides=claim_overrides, 

519 csrf=config.cookie_csrf_protect, 

520 expires_delta=expires_delta, 

521 fresh=fresh, 

522 header_overrides=header_overrides, 

523 identity=self._user_identity_callback(identity), 

524 identity_claim_key=config.identity_claim_key, 

525 issuer=config.encode_issuer, 

526 json_encoder=config.json_encoder, 

527 secret=self._encode_key_callback(identity), 

528 token_type=token_type, 

529 nbf=config.encode_nbf, 

530 ) 

531 

532 def _decode_jwt_from_config( 

533 self, encoded_token: str, csrf_value=None, allow_expired: bool = False 

534 ) -> dict: 

535 unverified_claims = jwt.decode( 

536 encoded_token, 

537 algorithms=config.decode_algorithms, 

538 options={"verify_signature": False}, 

539 ) 

540 unverified_headers = jwt.get_unverified_header(encoded_token) 

541 secret = self._decode_key_callback(unverified_headers, unverified_claims) 

542 

543 kwargs = { 

544 "algorithms": config.decode_algorithms, 

545 "audience": config.decode_audience, 

546 "csrf_value": csrf_value, 

547 "encoded_token": encoded_token, 

548 "identity_claim_key": config.identity_claim_key, 

549 "issuer": config.decode_issuer, 

550 "leeway": config.leeway, 

551 "secret": secret, 

552 "verify_aud": config.decode_audience is not None, 

553 } 

554 

555 try: 

556 return _decode_jwt(**kwargs, allow_expired=allow_expired) 

557 except ExpiredSignatureError as e: 

558 # TODO: If we ever do another breaking change, don't raise this pyjwt 

559 # error directly, instead raise a custom error of ours from this 

560 # error. 

561 e.jwt_header = unverified_headers # type: ignore 

562 e.jwt_data = _decode_jwt(**kwargs, allow_expired=True) # type: ignore 

563 raise