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# -*- coding: utf-8 -*- |
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# Copyright 2018 Telefonica S.A. |
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# Copyright 2018 ALTRAN Innovación S.L. |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); you may |
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# not use this file except in compliance with the License. You may obtain |
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# a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
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# License for the specific language governing permissions and limitations |
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# under the License. |
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# |
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# For those usages not covered by the Apache License, Version 2.0 please |
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# contact: esousa@whitestack.com or glavado@whitestack.com |
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## |
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|
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""" |
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AuthconnInternal implements implements the connector for |
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OSM Internal Authentication Backend and leverages the RBAC model |
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""" |
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__author__ = ( |
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"Pedro de la Cruz Ramos <pdelacruzramos@altran.com>, " |
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"Alfonso Tierno <alfonso.tiernosepulveda@telefoncia.com" |
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) |
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__date__ = "$06-jun-2019 11:16:08$" |
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import logging |
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import re |
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|
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from osm_nbi.authconn import ( |
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Authconn, |
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AuthException, |
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AuthconnConflictException, |
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) # , AuthconnOperationException |
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from osm_common.dbbase import DbException |
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from osm_nbi.base_topic import BaseTopic |
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from osm_nbi.validation import is_valid_uuid |
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from time import time, sleep |
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from http import HTTPStatus |
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from uuid import uuid4 |
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from hashlib import sha256 |
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from copy import deepcopy |
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from random import choice as random_choice |
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class AuthconnInternal(Authconn): |
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token_time_window = 2 # seconds |
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token_delay = 1 # seconds to wait upon second request within time window |
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|
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users_collection = "users" |
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roles_collection = "roles" |
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projects_collection = "projects" |
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tokens_collection = "tokens" |
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|
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def __init__(self, config, db, role_permissions): |
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Authconn.__init__(self, config, db, role_permissions) |
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self.logger = logging.getLogger("nbi.authenticator.internal") |
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self.db = db |
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# self.msg = msg |
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# self.token_cache = token_cache |
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# To be Confirmed |
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self.sess = None |
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|
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def validate_token(self, token): |
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""" |
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Check if the token is valid. |
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:param token: token to validate |
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:return: dictionary with information associated with the token: |
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"_id": token id |
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"project_id": project id |
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"project_name": project name |
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"user_id": user id |
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"username": user name |
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"roles": list with dict containing {name, id} |
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"expires": expiration date |
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If the token is not valid an exception is raised. |
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""" |
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|
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try: |
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if not token: |
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raise AuthException( |
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"Needed a token or Authorization HTTP header", |
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http_code=HTTPStatus.UNAUTHORIZED, |
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) |
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now = time() |
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# get from database if not in cache |
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# if not token_info: |
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token_info = self.db.get_one(self.tokens_collection, {"_id": token}) |
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if token_info["expires"] < now: |
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raise AuthException( |
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"Expired Token or Authorization HTTP header", |
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http_code=HTTPStatus.UNAUTHORIZED, |
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) |
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return token_info |
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except DbException as e: |
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if e.http_code == HTTPStatus.NOT_FOUND: |
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raise AuthException( |
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"Invalid Token or Authorization HTTP header", |
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http_code=HTTPStatus.UNAUTHORIZED, |
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) |
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else: |
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raise |
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except AuthException: |
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raise |
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except Exception: |
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self.logger.exception( |
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"Error during token validation using internal backend" |
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) |
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raise AuthException( |
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"Error during token validation using internal backend", |
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http_code=HTTPStatus.UNAUTHORIZED, |
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) |
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|
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def revoke_token(self, token): |
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""" |
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Invalidate a token. |
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:param token: token to be revoked |
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""" |
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try: |
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# self.token_cache.pop(token, None) |
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self.db.del_one(self.tokens_collection, {"_id": token}) |
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return True |
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except DbException as e: |
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if e.http_code == HTTPStatus.NOT_FOUND: |
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raise AuthException( |
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"Token '{}' not found".format(token), http_code=HTTPStatus.NOT_FOUND |
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) |
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else: |
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# raise |
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exmsg = "Error during token revocation using internal backend" |
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self.logger.exception(exmsg) |
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raise AuthException(exmsg, http_code=HTTPStatus.UNAUTHORIZED) |
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def validate_user(self, user, password): |
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""" |
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Validate username and password via appropriate backend. |
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:param user: username of the user. |
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:param password: password to be validated. |
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""" |
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user_rows = self.db.get_list( |
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self.users_collection, {BaseTopic.id_field("users", user): user} |
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) |
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user_content = None |
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if user_rows: |
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user_content = user_rows[0] |
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salt = user_content["_admin"]["salt"] |
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shadow_password = sha256( |
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password.encode("utf-8") + salt.encode("utf-8") |
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).hexdigest() |
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if shadow_password != user_content["password"]: |
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user_content = None |
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return user_content |
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def authenticate(self, credentials, token_info=None): |
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""" |
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Authenticate a user using username/password or previous token_info plus project; its creates a new token |
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:param credentials: dictionary that contains: |
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username: name, id or None |
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password: password or None |
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project_id: name, id, or None. If None first found project will be used to get an scope token |
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other items are allowed and ignored |
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:param token_info: previous token_info to obtain authorization |
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:return: the scoped token info or raises an exception. The token is a dictionary with: |
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_id: token string id, |
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username: username, |
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project_id: scoped_token project_id, |
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project_name: scoped_token project_name, |
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expires: epoch time when it expires, |
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""" |
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|
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now = time() |
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user_content = None |
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user = credentials.get("username") |
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password = credentials.get("password") |
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project = credentials.get("project_id") |
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# Try using username/password |
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if user: |
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user_content = self.validate_user(user, password) |
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if not user_content: |
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raise AuthException( |
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"Invalid username/password", http_code=HTTPStatus.UNAUTHORIZED |
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) |
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if not user_content.get("_admin", None): |
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raise AuthException( |
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"No default project for this user.", |
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http_code=HTTPStatus.UNAUTHORIZED, |
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) |
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elif token_info: |
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user_rows = self.db.get_list( |
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self.users_collection, {"username": token_info["username"]} |
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) |
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if user_rows: |
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user_content = user_rows[0] |
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else: |
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raise AuthException("Invalid token", http_code=HTTPStatus.UNAUTHORIZED) |
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else: |
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raise AuthException( |
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"Provide credentials: username/password or Authorization Bearer token", |
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http_code=HTTPStatus.UNAUTHORIZED, |
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) |
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# Delay upon second request within time window |
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if ( |
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now - user_content["_admin"].get("last_token_time", 0) |
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< self.token_time_window |
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): |
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sleep(self.token_delay) |
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# user_content["_admin"]["last_token_time"] = now |
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# self.db.replace("users", user_content["_id"], user_content) # might cause race conditions |
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self.db.set_one( |
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self.users_collection, |
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{"_id": user_content["_id"]}, |
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{"_admin.last_token_time": now}, |
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) |
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|
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token_id = "".join( |
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random_choice( |
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"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789" |
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) |
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for _ in range(0, 32) |
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) |
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# projects = user_content.get("projects", []) |
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prm_list = user_content.get("project_role_mappings", []) |
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|
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if not project: |
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project = prm_list[0]["project"] if prm_list else None |
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if not project: |
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raise AuthException( |
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"can't find a default project for this user", |
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http_code=HTTPStatus.UNAUTHORIZED, |
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) |
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|
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projects = [prm["project"] for prm in prm_list] |
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|
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proj = self.db.get_one( |
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self.projects_collection, {BaseTopic.id_field("projects", project): project} |
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) |
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project_name = proj["name"] |
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project_id = proj["_id"] |
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if project_name not in projects and project_id not in projects: |
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raise AuthException( |
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"project {} not allowed for this user".format(project), |
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http_code=HTTPStatus.UNAUTHORIZED, |
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) |
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# TODO remove admin, this vill be used by roles RBAC |
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if project_name == "admin": |
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token_admin = True |
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else: |
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token_admin = proj.get("admin", False) |
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|
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# add token roles |
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roles = [] |
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roles_list = [] |
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for prm in prm_list: |
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if prm["project"] in [project_id, project_name]: |
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role = self.db.get_one( |
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self.roles_collection, |
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{BaseTopic.id_field("roles", prm["role"]): prm["role"]}, |
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) |
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rid = role["_id"] |
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if rid not in roles: |
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rnm = role["name"] |
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roles.append(rid) |
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roles_list.append({"name": rnm, "id": rid}) |
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if not roles_list: |
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rid = self.db.get_one(self.roles_collection, {"name": "project_admin"})[ |
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"_id" |
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] |
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roles_list = [{"name": "project_admin", "id": rid}] |
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|
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new_token = { |
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"issued_at": now, |
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"expires": now + 3600, |
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"_id": token_id, |
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"id": token_id, |
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"project_id": proj["_id"], |
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"project_name": proj["name"], |
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"username": user_content["username"], |
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"user_id": user_content["_id"], |
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"admin": token_admin, |
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"roles": roles_list, |
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} |
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|
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self.db.create(self.tokens_collection, new_token) |
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return deepcopy(new_token) |
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|
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def get_role_list(self, filter_q={}): |
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""" |
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Get role list. |
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|
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:return: returns the list of roles. |
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""" |
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return self.db.get_list(self.roles_collection, filter_q) |
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|
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def create_role(self, role_info): |
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""" |
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Create a role. |
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|
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:param role_info: full role info. |
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:return: returns the role id. |
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:raises AuthconnOperationException: if role creation failed. |
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""" |
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# TODO: Check that role name does not exist ? |
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rid = str(uuid4()) |
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role_info["_id"] = rid |
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rid = self.db.create(self.roles_collection, role_info) |
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return rid |
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|
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def delete_role(self, role_id): |
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""" |
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Delete a role. |
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|
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:param role_id: role identifier. |
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:raises AuthconnOperationException: if role deletion failed. |
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""" |
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rc = self.db.del_one(self.roles_collection, {"_id": role_id}) |
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self.db.del_list(self.tokens_collection, {"roles.id": role_id}) |
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return rc |
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|
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def update_role(self, role_info): |
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""" |
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Update a role. |
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|
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:param role_info: full role info. |
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:return: returns the role name and id. |
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:raises AuthconnOperationException: if user creation failed. |
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""" |
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rid = role_info["_id"] |
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self.db.set_one(self.roles_collection, {"_id": rid}, role_info) |
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return {"_id": rid, "name": role_info["name"]} |
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|
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def create_user(self, user_info): |
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""" |
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Create a user. |
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|
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:param user_info: full user info. |
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:return: returns the username and id of the user. |
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""" |
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BaseTopic.format_on_new(user_info, make_public=False) |
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salt = uuid4().hex |
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user_info["_admin"]["salt"] = salt |
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present = time() |
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if not user_info["username"] == "admin": |
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if self.config.get("pwd_expiry_check"): |
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user_info["_admin"]["modified_time"] = present |
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user_info["_admin"]["expire_time"] = present |
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if "password" in user_info: |
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user_info["password"] = sha256( |
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|
user_info["password"].encode("utf-8") + salt.encode("utf-8") |
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).hexdigest() |
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# "projects" are not stored any more |
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if "projects" in user_info: |
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del user_info["projects"] |
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self.db.create(self.users_collection, user_info) |
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return {"username": user_info["username"], "_id": user_info["_id"]} |
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|
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def update_user(self, user_info): |
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""" |
| 376 |
|
Change the user name and/or password. |
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|
|
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|
:param user_info: user info modifications |
| 379 |
|
""" |
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0 |
uid = user_info["_id"] |
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old_pwd = user_info.get("old_password") |
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user_data = self.db.get_one( |
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|
self.users_collection, {BaseTopic.id_field("users", uid): uid} |
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) |
| 385 |
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if old_pwd: |
| 386 |
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salt = user_data["_admin"]["salt"] |
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shadow_password = sha256( |
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old_pwd.encode("utf-8") + salt.encode("utf-8") |
| 389 |
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).hexdigest() |
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if shadow_password != user_data["password"]: |
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raise AuthconnConflictException( |
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|
"Incorrect password", http_code=HTTPStatus.CONFLICT |
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) |
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BaseTopic.format_on_edit(user_data, user_info) |
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# User Name |
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usnm = user_info.get("username") |
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if usnm: |
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user_data["username"] = usnm |
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# If password is given and is not already encripted |
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pswd = user_info.get("password") |
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if pswd and ( |
| 402 |
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len(pswd) != 64 or not re.match("[a-fA-F0-9]*", pswd) |
| 403 |
|
): # TODO: Improve check? |
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salt = uuid4().hex |
| 405 |
0 |
if "_admin" not in user_data: |
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user_data["_admin"] = {} |
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user_data["_admin"]["salt"] = salt |
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user_data["password"] = sha256( |
| 409 |
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pswd.encode("utf-8") + salt.encode("utf-8") |
| 410 |
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).hexdigest() |
| 411 |
0 |
if not user_data["username"] == "admin": |
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if self.config.get("pwd_expiry_check"): |
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present = time() |
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0 |
if self.config.get("days"): |
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0 |
expire = present + 86400 * self.config.get("days") |
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user_data["_admin"]["modified_time"] = present |
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user_data["_admin"]["expire_time"] = expire |
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# Project-Role Mappings |
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|
# TODO: Check that user_info NEVER includes "project_role_mappings" |
| 420 |
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if "project_role_mappings" not in user_data: |
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0 |
user_data["project_role_mappings"] = [] |
| 422 |
0 |
for prm in user_info.get("add_project_role_mappings", []): |
| 423 |
0 |
user_data["project_role_mappings"].append(prm) |
| 424 |
0 |
for prm in user_info.get("remove_project_role_mappings", []): |
| 425 |
0 |
for pidf in ["project", "project_name"]: |
| 426 |
0 |
for ridf in ["role", "role_name"]: |
| 427 |
0 |
try: |
| 428 |
0 |
user_data["project_role_mappings"].remove( |
| 429 |
|
{"role": prm[ridf], "project": prm[pidf]} |
| 430 |
|
) |
| 431 |
0 |
except KeyError: |
| 432 |
0 |
pass |
| 433 |
0 |
except ValueError: |
| 434 |
0 |
pass |
| 435 |
0 |
idf = BaseTopic.id_field("users", uid) |
| 436 |
0 |
self.db.set_one(self.users_collection, {idf: uid}, user_data) |
| 437 |
0 |
if user_info.get("remove_project_role_mappings"): |
| 438 |
0 |
idf = "user_id" if idf == "_id" else idf |
| 439 |
0 |
self.db.del_list(self.tokens_collection, {idf: uid}) |
| 440 |
|
|
| 441 |
1 |
def delete_user(self, user_id): |
| 442 |
|
""" |
| 443 |
|
Delete user. |
| 444 |
|
|
| 445 |
|
:param user_id: user identifier. |
| 446 |
|
:raises AuthconnOperationException: if user deletion failed. |
| 447 |
|
""" |
| 448 |
0 |
self.db.del_one(self.users_collection, {"_id": user_id}) |
| 449 |
0 |
self.db.del_list(self.tokens_collection, {"user_id": user_id}) |
| 450 |
0 |
return True |
| 451 |
|
|
| 452 |
1 |
def get_user_list(self, filter_q=None): |
| 453 |
|
""" |
| 454 |
|
Get user list. |
| 455 |
|
|
| 456 |
|
:param filter_q: dictionary to filter user list by: |
| 457 |
|
name (username is also admitted). If a user id is equal to the filter name, it is also provided |
| 458 |
|
other |
| 459 |
|
:return: returns a list of users. |
| 460 |
|
""" |
| 461 |
0 |
filt = filter_q or {} |
| 462 |
0 |
if "name" in filt: # backward compatibility |
| 463 |
0 |
filt["username"] = filt.pop("name") |
| 464 |
0 |
if filt.get("username") and is_valid_uuid(filt["username"]): |
| 465 |
|
# username cannot be a uuid. If this is the case, change from username to _id |
| 466 |
0 |
filt["_id"] = filt.pop("username") |
| 467 |
0 |
users = self.db.get_list(self.users_collection, filt) |
| 468 |
0 |
project_id_name = {} |
| 469 |
0 |
role_id_name = {} |
| 470 |
0 |
for user in users: |
| 471 |
0 |
prms = user.get("project_role_mappings") |
| 472 |
0 |
projects = user.get("projects") |
| 473 |
0 |
if prms: |
| 474 |
0 |
projects = [] |
| 475 |
|
# add project_name and role_name. Generate projects for backward compatibility |
| 476 |
0 |
for prm in prms: |
| 477 |
0 |
project_id = prm["project"] |
| 478 |
0 |
if project_id not in project_id_name: |
| 479 |
0 |
pr = self.db.get_one( |
| 480 |
|
self.projects_collection, |
| 481 |
|
{BaseTopic.id_field("projects", project_id): project_id}, |
| 482 |
|
fail_on_empty=False, |
| 483 |
|
) |
| 484 |
0 |
project_id_name[project_id] = pr["name"] if pr else None |
| 485 |
0 |
prm["project_name"] = project_id_name[project_id] |
| 486 |
0 |
if prm["project_name"] not in projects: |
| 487 |
0 |
projects.append(prm["project_name"]) |
| 488 |
|
|
| 489 |
0 |
role_id = prm["role"] |
| 490 |
0 |
if role_id not in role_id_name: |
| 491 |
0 |
role = self.db.get_one( |
| 492 |
|
self.roles_collection, |
| 493 |
|
{BaseTopic.id_field("roles", role_id): role_id}, |
| 494 |
|
fail_on_empty=False, |
| 495 |
|
) |
| 496 |
0 |
role_id_name[role_id] = role["name"] if role else None |
| 497 |
0 |
prm["role_name"] = role_id_name[role_id] |
| 498 |
0 |
user["projects"] = projects # for backward compatibility |
| 499 |
0 |
elif projects: |
| 500 |
|
# user created with an old version. Create a project_role mapping with role project_admin |
| 501 |
0 |
user["project_role_mappings"] = [] |
| 502 |
0 |
role = self.db.get_one( |
| 503 |
|
self.roles_collection, |
| 504 |
|
{BaseTopic.id_field("roles", "project_admin"): "project_admin"}, |
| 505 |
|
) |
| 506 |
0 |
for p_id_name in projects: |
| 507 |
0 |
pr = self.db.get_one( |
| 508 |
|
self.projects_collection, |
| 509 |
|
{BaseTopic.id_field("projects", p_id_name): p_id_name}, |
| 510 |
|
) |
| 511 |
0 |
prm = { |
| 512 |
|
"project": pr["_id"], |
| 513 |
|
"project_name": pr["name"], |
| 514 |
|
"role_name": "project_admin", |
| 515 |
|
"role": role["_id"], |
| 516 |
|
} |
| 517 |
0 |
user["project_role_mappings"].append(prm) |
| 518 |
|
else: |
| 519 |
0 |
user["projects"] = [] |
| 520 |
0 |
user["project_role_mappings"] = [] |
| 521 |
|
|
| 522 |
0 |
return users |
| 523 |
|
|
| 524 |
1 |
def get_project_list(self, filter_q={}): |
| 525 |
|
""" |
| 526 |
|
Get role list. |
| 527 |
|
|
| 528 |
|
:return: returns the list of projects. |
| 529 |
|
""" |
| 530 |
0 |
return self.db.get_list(self.projects_collection, filter_q) |
| 531 |
|
|
| 532 |
1 |
def create_project(self, project_info): |
| 533 |
|
""" |
| 534 |
|
Create a project. |
| 535 |
|
|
| 536 |
|
:param project: full project info. |
| 537 |
|
:return: the internal id of the created project |
| 538 |
|
:raises AuthconnOperationException: if project creation failed. |
| 539 |
|
""" |
| 540 |
0 |
pid = self.db.create(self.projects_collection, project_info) |
| 541 |
0 |
return pid |
| 542 |
|
|
| 543 |
1 |
def delete_project(self, project_id): |
| 544 |
|
""" |
| 545 |
|
Delete a project. |
| 546 |
|
|
| 547 |
|
:param project_id: project identifier. |
| 548 |
|
:raises AuthconnOperationException: if project deletion failed. |
| 549 |
|
""" |
| 550 |
0 |
idf = BaseTopic.id_field("projects", project_id) |
| 551 |
0 |
r = self.db.del_one(self.projects_collection, {idf: project_id}) |
| 552 |
0 |
idf = "project_id" if idf == "_id" else "project_name" |
| 553 |
0 |
self.db.del_list(self.tokens_collection, {idf: project_id}) |
| 554 |
0 |
return r |
| 555 |
|
|
| 556 |
1 |
def update_project(self, project_id, project_info): |
| 557 |
|
""" |
| 558 |
|
Change the name of a project |
| 559 |
|
|
| 560 |
|
:param project_id: project to be changed |
| 561 |
|
:param project_info: full project info |
| 562 |
|
:return: None |
| 563 |
|
:raises AuthconnOperationException: if project update failed. |
| 564 |
|
""" |
| 565 |
0 |
self.db.set_one( |
| 566 |
|
self.projects_collection, |
| 567 |
|
{BaseTopic.id_field("projects", project_id): project_id}, |
| 568 |
|
project_info, |
| 569 |
|
) |
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