proof of concept jwt auth

music/api/api.py

@@ -7,7 +7,7 @@ import json
 import logging
 from datetime import datetime
 
-from music.api.decorators import login_required, login_or_basic_auth, \
+from music.api.decorators import login_or_jwt, login_required, login_or_basic_auth, \
     admin_required, cloud_task, validate_json, validate_args, spotify_link_required
 from music.cloud import queue_run_user_playlist, offload_or_run_user_playlist
 from music.cloud.tasks import update_all_user_playlists, update_playlists
@@ -46,9 +46,9 @@ def all_playlists_route(user=None):
 
 
 @blueprint.route('/playlist', methods=['GET', 'DELETE'])
-@login_or_basic_auth
+@login_or_jwt
 @validate_args(('name', str))
-def playlist_get_delete_route(user=None):
+def playlist_get_delete_route(auth=None,user=None):
 
     playlist = user.get_playlist(request.args['name'], raise_error=False)
 

music/api/decorators.py

@@ -4,6 +4,7 @@ import logging
 from flask import session, request, jsonify
 
 from music.model.user import User
+from music.auth.jwt_keys import validate_key
 
 logger = logging.getLogger(__name__)
 
@@ -30,6 +31,19 @@ def is_basic_authed():
     return False, None
 
 
+def is_jwt_authed():
+    if request.headers.get('Authorization', None):
+
+        unparsed = request.headers.get('Authorization')
+
+        if unparsed.startswith('Bearer '):
+
+            token = validate_key(unparsed.removeprefix('Bearer ').strip())
+
+            if token is not None:
+                return token
+
+
 def login_required(func):
     @functools.wraps(func)
     def login_required_wrapper(*args, **kwargs):
@@ -42,6 +56,48 @@ def login_required(func):
     return login_required_wrapper
 
 
+def login_or_jwt(func):
+    @functools.wraps(func)
+    def login_or_jwt_wrapper(*args, **kwargs):
+        if is_logged_in():
+            user = User.collection.filter('username', '==', session['username'].strip().lower()).get()
+            return func(*args, user=user, **kwargs)
+        else:
+            token = is_jwt_authed()
+            if token is not None:
+                user = User.collection.filter('username', '==', token['sub'].strip().lower()).get()
+                
+                if user is not None:
+                    return func(*args, auth=token, user=user, **kwargs)
+                else:
+                    logger.warning(f'user {token["sub"]} not found')
+                    return jsonify({'error': f'user {token["sub"]} not found'}), 404
+            else:
+                logger.warning('user not authorised')
+                return jsonify({'error': 'not authorised'}), 401
+
+    return login_or_jwt_wrapper
+
+def jwt_required(func):
+    @functools.wraps(func)
+    def jwt_required_wrapper(*args, **kwargs):
+        
+        token = is_jwt_authed()
+        if token is not None:
+            user = User.collection.filter('username', '==', token['sub'].strip().lower()).get()
+
+            if user is not None:
+                return func(*args, auth=token, user=user, **kwargs)
+            else:
+                logger.warning(f'user {token["sub"]} not found')
+                return jsonify({'error': f'user {token["sub"]} not found'}), 404
+        else:
+            logger.warning('user not authorised')
+            return jsonify({'error': 'not authorised'}), 401
+
+    return jwt_required_wrapper
+
+
 def login_or_basic_auth(func):
     @functools.wraps(func)
     def login_or_basic_auth_wrapper(*args, **kwargs):

music/auth/auth.py

@@ -1,7 +1,8 @@
-from flask import Blueprint, session, flash, request, redirect, url_for, render_template
+from flask import Blueprint, session, flash, request, redirect, url_for, render_template, jsonify
 from werkzeug.security import generate_password_hash
 from music.model.user import User
 from music.model.config import Config
+from music.auth.jwt_keys import generate_key
 
 from urllib.parse import urlencode, urlunparse
 import datetime
@@ -68,6 +69,44 @@ def logout():
     flash('logged out')
     return redirect(url_for('index'))
 
+@blueprint.route('/token', methods=['POST'])
+def jwt_token():
+    """Generate JWT
+
+    Returns:
+        HTTP Response: token request on POST
+    """
+
+    request_json = request.get_json()
+
+    username = request_json.get('username', None)
+    password = request_json.get('password', None)
+
+    if username is None or password is None:
+        return jsonify({"message": 'username and password fields required', "status": "error"}), 400
+
+    user = User.collection.filter('username', '==', username.strip().lower()).get()
+
+    if user is None:
+        return jsonify({"message": 'user not found', "status": "error"}), 404
+
+    if user.check_password(password):
+        if user.locked:
+            logger.warning(f'locked account token attempt {username}')
+            return jsonify({"message": 'user locked', "status": "error"}), 403
+
+        user.last_login = datetime.datetime.utcnow()
+        user.update()
+
+        logger.info(f'generating token for {username}')
+
+        token = generate_key(user)
+
+        return jsonify({"token": token, "status": "success"}), 200
+    else:
+        logger.warning(f'failed token attempt {username}')
+        return jsonify({"message": 'authentication failed', "status": "error"}), 401
+
 
 @blueprint.route('/register', methods=['GET', 'POST'])
 def register():

music/auth/jwt_keys.py

@@ -0,0 +1,41 @@
+from ctypes import Union
+from datetime import timedelta, datetime, timezone
+import jwt
+from music.model.user import User
+from music.model.config import Config
+
+def get_jwt_secret_key() -> str:
+
+    config = Config.collection.get("config/music-tools")
+    
+    if config.jwt_secret_key is None or len(config.jwt_secret_key) == 0:
+        raise KeyError("no jwt secret key found")
+
+    return config.jwt_secret_key
+
+def generate_key(user: User, timeout: datetime | timedelta = timedelta(minutes=60)) -> str:
+
+    if isinstance(timeout, timedelta):
+        exp = timeout + datetime.now(tz=timezone.utc)
+    else:
+        exp = timeout
+
+    payload = {
+        "exp": exp,
+        "iss": "mixonomer-api",
+        "sub": user.username
+    }
+
+    return jwt.encode(payload, get_jwt_secret_key(), algorithm="HS512")
+
+def validate_key(key: str) -> dict:
+
+    try:
+        decoded = jwt.decode(key, get_jwt_secret_key(), algorithms=["HS512"], options={
+            "require": ["exp", "sub"]
+        })
+
+        return decoded
+
+    except Exception as e:
+        pass

music/model/config.py

@@ -19,3 +19,4 @@ class Config(Model):
     """Determines whether playlist and tag update operations are done by Cloud Tasks or Functions
     """
     secret_key = TextField()
+    jwt_secret_key = TextField()

poetry.lock

@@ -462,6 +462,20 @@ python-versions = "*"
 [package.dependencies]
 pyasn1 = ">=0.4.6,<0.5.0"
 
+[[package]]
+name = "pyjwt"
+version = "2.4.0"
+description = "JSON Web Token implementation in Python"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.extras]
+tests = ["coverage[toml] (==5.0.4)", "pytest (>=6.0.0,<7.0.0)"]
+docs = ["zope.interface", "sphinx-rtd-theme", "sphinx"]
+dev = ["pre-commit", "mypy", "coverage[toml] (==5.0.4)", "pytest (>=6.0.0,<7.0.0)", "cryptography (>=3.3.1)", "zope.interface", "sphinx-rtd-theme", "sphinx"]
+crypto = ["cryptography (>=3.3.1)"]
+
 [[package]]
 name = "pylint"
 version = "2.14.5"
@@ -655,7 +669,7 @@ python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
 [metadata]
 lock-version = "1.1"
 python-versions = "~3.10"
-content-hash = "e3a9a1b705fe06227a9e09263b2e84aa6ee1bc6e41096732f06715a109daca4e"
+content-hash = "740e615c75f16d1d097c47b49a18fc3487be9541f257d5181d198693feb87380"
 
 [metadata.files]
 astroid = [
@@ -958,6 +972,10 @@ pyasn1-modules = [
     {file = "pyasn1_modules-0.2.8-py3.6.egg", hash = "sha256:cbac4bc38d117f2a49aeedec4407d23e8866ea4ac27ff2cf7fb3e5b570df19e0"},
     {file = "pyasn1_modules-0.2.8-py3.7.egg", hash = "sha256:c29a5e5cc7a3f05926aff34e097e84f8589cd790ce0ed41b67aed6857b26aafd"},
 ]
+pyjwt = [
+    {file = "PyJWT-2.4.0-py3-none-any.whl", hash = "sha256:72d1d253f32dbd4f5c88eaf1fdc62f3a19f676ccbadb9dbc5d07e951b2b26daf"},
+    {file = "PyJWT-2.4.0.tar.gz", hash = "sha256:d42908208c699b3b973cbeb01a969ba6a96c821eefb1c5bfe4c390c01d67abba"},
+]
 pylint = [
     {file = "pylint-2.14.5-py3-none-any.whl", hash = "sha256:fabe30000de7d07636d2e82c9a518ad5ad7908590fe135ace169b44839c15f90"},
     {file = "pylint-2.14.5.tar.gz", hash = "sha256:487ce2192eee48211269a0e976421f334cf94de1806ca9d0a99449adcdf0285e"},

pyproject.toml

@@ -21,6 +21,7 @@ google-cloud-logging = "^3.2.1"
 google-cloud-pubsub = "^2.13.4"
 google-cloud-tasks = "^2.10.0"
 requests = "^2.28.1"
+PyJWT = "^2.4.0"
 
 spotframework = { git = "https://github.com/Sarsoo/spotframework.git" }
 fmframework = { git = "https://github.com/Sarsoo/pyfmframework.git" }

tests/test_auth.py

@@ -0,0 +1,33 @@
+from ast import Assert
+from time import sleep
+import unittest
+from datetime import timedelta
+
+from music.model.user import User
+from music.auth.jwt_keys import generate_key, validate_key
+
+class TestAuth(unittest.TestCase):
+
+    def test_encode_decode(self):
+        
+        test_user = User.collection.filter('username', '==', "test").get()
+
+        key = generate_key(test_user, timedelta(minutes=10))
+
+        decoded = validate_key(key)
+
+        self.assertEqual(decoded["sub"], test_user.username)
+
+    def test_timeout(self):
+        
+        test_user = User.collection.filter('username', '==', "test").get()
+
+        key = generate_key(test_user, timedelta(seconds=2))
+
+        decoded = validate_key(key)
+        self.assertIsNotNone(decoded)
+
+        sleep(2.5)
+
+        decoded = validate_key(key)
+        self.assertIsNone(decoded)