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"""Module with main classes related to Authentication.""" |
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import datetime |
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import getpass |
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import hashlib |
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import logging |
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import time |
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from functools import wraps |
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from http import HTTPStatus |
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import jwt |
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from flask import jsonify, request |
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from kytos.core.config import KytosConfig |
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from kytos.core.events import KytosEvent |
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__all__ = ['authenticated'] |
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LOG = logging.getLogger(__name__) |
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def authenticated(func): |
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"""Handle tokens from requests.""" |
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@wraps(func) |
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def wrapper(*args, **kwargs): |
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"""Verify the requires of token.""" |
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try: |
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content = request.headers.get("Authorization") |
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if content is None: |
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raise AttributeError |
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token = content.split("Bearer ")[1] |
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jwt.decode(token, key=Auth.get_jwt_secret()) |
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except ( |
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AttributeError, |
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IndexError, |
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jwt.ExpiredSignature, |
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jwt.exceptions.DecodeError, |
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) as exc: |
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msg = f"Token not sent or expired: {exc}" |
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return jsonify({"error": msg}), HTTPStatus.UNAUTHORIZED.value |
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return func(*args, **kwargs) |
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return wrapper |
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class Auth: |
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"""Module used to provide Kytos authentication routes.""" |
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def __init__(self, controller): |
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"""Init method of Auth class takes the parameters below. |
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Args: |
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controller(kytos.core.controller): A Controller instance. |
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""" |
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self.controller = controller |
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self.namespace = "kytos.core.auth.users" |
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if self.controller.options.create_superuser is True: |
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self._create_superuser() |
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@classmethod |
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def get_jwt_secret(cls): |
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"""Return JWT secret defined in kytos conf.""" |
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options = KytosConfig().options['daemon'] |
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return options.jwt_secret |
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@classmethod |
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def _generate_token(cls, username, time_exp): |
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"""Generate a jwt token.""" |
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return jwt.encode( |
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{ |
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'username': username, |
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'iss': "Kytos NApps Server", |
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'exp': time_exp, |
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}, |
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Auth.get_jwt_secret(), |
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algorithm='HS256', |
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) |
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def _create_superuser(self): |
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"""Create a superuser using Storehouse.""" |
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def _create_superuser_callback(_event, box, error): |
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if box and not error: |
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LOG.info("Superuser successfully created") |
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def get_username(): |
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return input("Username: ") |
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def get_email(): |
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return input("Email: ") |
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username = get_username() |
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email = get_email() |
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while True: |
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password = getpass.getpass() |
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re_password = getpass.getpass('Retype password: ') |
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if password == re_password: |
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break |
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print('Passwords do not match. Try again') |
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user = { |
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"username": username, |
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"email": email, |
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"password": hashlib.sha512(password.encode()).hexdigest(), |
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} |
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content = { |
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"namespace": self.namespace, |
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"box_id": user["username"], |
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"data": user, |
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"callback": _create_superuser_callback, |
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} |
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event = KytosEvent(name="kytos.storehouse.create", content=content) |
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self.controller.buffers.app.put(event) |
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def register_core_auth_services(self): |
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""" |
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Register /kytos/core/ services over authentication. |
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It registers create, authenticate, list all, list specific, delete and |
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update users. |
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""" |
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self.controller.api_server.register_core_endpoint( |
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"auth/login/", self._authenticate_user |
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) |
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self.controller.api_server.register_core_endpoint( |
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"auth/users/", self._list_users |
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) |
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self.controller.api_server.register_core_endpoint( |
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"auth/users/<uid>", self._list_user |
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) |
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self.controller.api_server.register_core_endpoint( |
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"auth/users/", self._create_user, methods=["POST"] |
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) |
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self.controller.api_server.register_core_endpoint( |
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"auth/users/<uid>", self._delete_user, methods=["DELETE"] |
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) |
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self.controller.api_server.register_core_endpoint( |
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"auth/users/<uid>", self._update_user, methods=["PATCH"] |
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) |
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def _authenticate_user(self): |
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"""Authenticate a user using Storehouse.""" |
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username = request.authorization["username"] |
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password = request.authorization["password"].encode() |
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try: |
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user = self._find_user(username)[0].get("data") |
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if user.get("password") != hashlib.sha512(password).hexdigest(): |
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raise KeyError |
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time_exp = datetime.datetime.utcnow() + datetime.timedelta( |
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minutes=10 |
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) |
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token = self._generate_token(username, time_exp) |
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return {"token": token.decode()}, HTTPStatus.OK.value |
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except (AttributeError, KeyError) as exc: |
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result = f"Incorrect username or password: {exc}" |
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return result, HTTPStatus.UNAUTHORIZED.value |
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def _find_user(self, uid): |
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"""Find a specific user using Storehouse.""" |
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response = {} |
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def _find_user_callback(_event, box, error): |
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nonlocal response |
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if not box: |
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response = { |
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"answer": f'User with uid {uid} not found', |
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"code": HTTPStatus.NOT_FOUND.value |
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} |
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elif error: |
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response = { |
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"answer": "User data cannot be shown", |
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"code": HTTPStatus.INTERNAL_SERVER_ERROR.value, |
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} |
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else: |
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response = { |
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"answer": {"data": box.data}, |
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"code": HTTPStatus.OK.value, |
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} |
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content = { |
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"box_id": uid, |
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"namespace": self.namespace, |
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"callback": _find_user_callback, |
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} |
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event = KytosEvent(name="kytos.storehouse.retrieve", content=content) |
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self.controller.buffers.app.put(event) |
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while True: |
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time.sleep(0.1) |
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if response: |
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break |
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return response["answer"], response["code"] |
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@authenticated |
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def _list_user(self, uid): |
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"""List a specific user using Storehouse.""" |
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answer, code = self._find_user(uid) |
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if code == HTTPStatus.OK.value: |
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del answer['data']['password'] |
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return answer, code |
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View Code Duplication |
@authenticated |
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def _list_users(self): |
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"""List all users using Storehouse.""" |
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response = {} |
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def _list_users_callback(_event, boxes, error): |
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nonlocal response |
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if error: |
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response = { |
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"answer": "Users cannot be listed", |
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"code": HTTPStatus.INTERNAL_SERVER_ERROR.value, |
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} |
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else: |
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response = { |
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"answer": {"users": boxes}, |
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"code": HTTPStatus.OK.value, |
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} |
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content = { |
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"namespace": self.namespace, |
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"callback": _list_users_callback, |
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} |
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event = KytosEvent(name="kytos.storehouse.list", content=content) |
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self.controller.buffers.app.put(event) |
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while True: |
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time.sleep(0.1) |
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if response: |
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break |
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return response["answer"], response["code"] |
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@authenticated |
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def _create_user(self): |
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"""Save a user using Storehouse.""" |
234
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1 |
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response = {} |
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236
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1 |
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def _create_user_callback(_event, box, error): |
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nonlocal response |
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238
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1 |
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if not box: |
239
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1 |
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response = { |
240
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"answer": f'User already exists', |
241
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"code": HTTPStatus.CONFLICT.value, |
242
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} |
243
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1 |
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elif error: |
244
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response = { |
245
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"answer": "User has not been created", |
246
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"code": HTTPStatus.INTERNAL_SERVER_ERROR.value, |
247
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} |
248
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else: |
249
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1 |
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response = { |
250
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"answer": "User successfully created", |
251
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"code": HTTPStatus.OK.value, |
252
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} |
253
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|
254
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1 |
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req = request.json |
255
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1 |
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password = req["password"].encode() |
256
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1 |
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data = { |
257
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"username": req["username"], |
258
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"email": req["email"], |
259
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"password": hashlib.sha512(password).hexdigest(), |
260
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} |
261
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1 |
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content = { |
262
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"namespace": self.namespace, |
263
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"box_id": data["username"], |
264
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"data": data, |
265
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"callback": _create_user_callback, |
266
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} |
267
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1 |
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event = KytosEvent(name="kytos.storehouse.create", content=content) |
268
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1 |
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self.controller.buffers.app.put(event) |
269
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1 |
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while True: |
270
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1 |
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time.sleep(0.1) |
271
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1 |
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if response: |
272
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1 |
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break |
273
|
1 |
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return response["answer"], response["code"] |
274
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|
275
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1 |
View Code Duplication |
@authenticated |
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276
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def _delete_user(self, uid): |
277
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"""Delete a user using Storehouse.""" |
278
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1 |
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response = {} |
279
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|
280
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1 |
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def _delete_user_callback(_event, box, error): |
281
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nonlocal response |
|
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282
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1 |
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if not box: |
283
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1 |
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response = { |
284
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"answer": f'User with uid {uid} not found', |
285
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"code": HTTPStatus.NOT_FOUND.value |
286
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} |
287
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1 |
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elif error: |
288
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response = { |
289
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"answer": "User has not been deleted", |
290
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"code": HTTPStatus.INTERNAL_SERVER_ERROR.value, |
291
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} |
292
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else: |
293
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1 |
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response = { |
294
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"answer": "User successfully deleted", |
295
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"code": HTTPStatus.OK.value, |
296
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} |
297
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298
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1 |
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content = { |
299
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"box_id": uid, |
300
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"namespace": self.namespace, |
301
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"callback": _delete_user_callback, |
302
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} |
303
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1 |
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event = KytosEvent(name="kytos.storehouse.delete", content=content) |
304
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1 |
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self.controller.buffers.app.put(event) |
305
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1 |
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while True: |
306
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1 |
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time.sleep(0.1) |
307
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1 |
|
if response: |
308
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1 |
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break |
309
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1 |
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return response["answer"], response["code"] |
310
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|
311
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1 |
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@authenticated |
312
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def _update_user(self, uid): |
313
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"""Update user data using Storehouse.""" |
314
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1 |
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response = {} |
315
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|
|
|
316
|
1 |
|
def _update_user_callback(_event, box, error): |
317
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|
nonlocal response |
|
|
|
|
318
|
1 |
|
if not box: |
319
|
1 |
|
response = { |
320
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|
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"answer": f'User with uid {uid} not found', |
321
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|
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"code": HTTPStatus.NOT_FOUND.value |
322
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} |
323
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1 |
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elif error: |
324
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response = { |
325
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"answer": "User has not been updated", |
326
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"code": HTTPStatus.INTERNAL_SERVER_ERROR.value, |
327
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} |
328
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else: |
329
|
1 |
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response = { |
330
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|
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"answer": "User successfully updated", |
331
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|
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"code": HTTPStatus.OK.value, |
332
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} |
333
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|
|
|
334
|
1 |
|
req = request.json |
335
|
1 |
|
allowed = ["username", "email", "password"] |
336
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|
|
|
337
|
1 |
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data = {} |
338
|
1 |
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for key, value in req.items(): |
339
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1 |
|
if key in allowed: |
340
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1 |
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data[key] = value |
341
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|
|
|
342
|
1 |
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content = { |
343
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"namespace": self.namespace, |
344
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"box_id": uid, |
345
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"data": data, |
346
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"callback": _update_user_callback, |
347
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} |
348
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1 |
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event = KytosEvent(name="kytos.storehouse.update", content=content) |
349
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1 |
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self.controller.buffers.app.put(event) |
350
|
1 |
|
while True: |
351
|
1 |
|
time.sleep(0.1) |
352
|
1 |
|
if response: |
353
|
1 |
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break |
354
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|
|
return response["answer"], response["code"] |
355
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|