Update login routine (remember me working)

cps/MyLoginManager.py

@@ -19,12 +19,12 @@
 #
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
+import ast
+import hashlib
 
+from .cw_login import LoginManager
+from flask import session
 
-from .cw_login import LoginManager, confirm_login
-from flask import session, current_app
-from .cw_login.utils import decode_cookie
-from .cw_login.signals import user_loaded_from_cookie
 
 
 class MyLoginManager(LoginManager):
@@ -36,19 +36,5 @@ class MyLoginManager(LoginManager):
             return super(). _session_protection_failed()
         return False
 
-    def _load_user_from_remember_cookie(self, cookie):
+
-        user_id = decode_cookie(cookie)
-        if user_id is not None:
-            session["_user_id"] = user_id
-            session["_fresh"] = False
-            user = None
-            if self._user_callback:
-                user = self._user_callback(user_id, None, None)
-            if user is not None:
-                app = current_app._get_current_object()
-                user_loaded_from_cookie.send(app, user=user)
-                # if session was restored from remember me cookie make login valid
-                confirm_login()
-                return user
-        return None
 

cps/cw_login/login_manager.py

@@ -1,5 +1,6 @@
 from datetime import datetime
 from datetime import timedelta
+import hashlib
 
 from flask import abort
 from flask import current_app
@@ -9,6 +10,8 @@ from flask import has_app_context
 from flask import redirect
 from flask import request
 from flask import session
+from itsdangerous import URLSafeSerializer
+from flask.json.tag import TaggedJSONSerializer
 
 from .config import AUTH_HEADER_NAME
 from .config import COOKIE_DURATION
@@ -32,8 +35,7 @@ from .signals import user_needs_refresh
 from .signals import user_unauthorized
 from .utils import _create_identifier
 from .utils import _user_context_processor
-from .utils import decode_cookie
+from .utils import confirm_login
-from .utils import encode_cookie
 from .utils import expand_login_view
 from .utils import login_url as make_login_url
 from .utils import make_next_param
@@ -323,7 +325,7 @@ class LoginManager:
         if self._user_callback is None and self._request_callback is None:
             raise Exception(
                 "Missing user_loader or request_loader. Refer to "
-                "http://flask-login.readthedocs.io/#how-it-works "
+                "https://flask-login.readthedocs.io/#how-it-works "
                 "for more info."
             )
 
@@ -361,7 +363,8 @@ class LoginManager:
             elif header_name in request.headers:
                 header = request.headers[header_name]
                 user = self._load_user_from_header(header)
-
+        if not user:
+            self._update_request_context_with_user()
         return self._update_request_context_with_user(user)
 
     def _session_protection_failed(self):
@@ -393,16 +396,32 @@ class LoginManager:
         return False
 
     def _load_user_from_remember_cookie(self, cookie):
-        user_id = decode_cookie(cookie)
+        signer_kwargs = dict(
-        if user_id is not None:
+            key_derivation="hmac", digest_method=staticmethod(hashlib.sha1)
-            session["_user_id"] = user_id
+        )
+        try:
+            remember_dict = URLSafeSerializer(
+                current_app.secret_key,
+                salt="remember",
+                serializer=TaggedJSONSerializer(),
+                signer_kwargs=signer_kwargs,
+            ).loads(cookie)
+        except Exception:
+            return None
+
+        if remember_dict['user'] is not None:
+            session["_user_id"] = remember_dict['user']
+            if "_random" not in session:
+                session["_random"] = remember_dict['random']
             session["_fresh"] = False
             user = None
             if self._user_callback:
-                user = self._user_callback(user_id)
+                user = self._user_callback(remember_dict['user'], session["_random"], None)
             if user is not None:
                 app = current_app._get_current_object()
                 user_loaded_from_cookie.send(app, user=user)
+                # if session was restored from remember me cookie make login valid
+                confirm_login()
                 return user
         return None
 
@@ -461,7 +480,17 @@ class LoginManager:
             duration = config.get("REMEMBER_COOKIE_DURATION", COOKIE_DURATION)
 
         # prepare data
-        data = encode_cookie(str(session["_user_id"]))
+        max_age = int(current_app.permanent_session_lifetime.total_seconds())
+        signer_kwargs = dict(
+            key_derivation="hmac", digest_method=staticmethod(hashlib.sha1)
+        )
+        # save
+        data = URLSafeSerializer(
+            current_app.secret_key,
+            salt="remember",
+            serializer=TaggedJSONSerializer(),
+            signer_kwargs=signer_kwargs,
+        ).dumps({"user":session["_user_id"], "random":session["_random"]})
 
         if isinstance(duration, int):
             duration = timedelta(seconds=duration)

cps/ub.py

@@ -74,10 +74,9 @@ def store_user_session():
     _user = flask_session.get('_user_id', "")
     _id = flask_session.get('_id', "")
     _random = flask_session.get('_random', "")
-
     if flask_session.get('_user_id', ""):
         try:
-            if not check_user_session(_user, _id):
+            if not check_user_session(_user, _id, _random):
                 expiry = int((datetime.datetime.now()  + datetime.timedelta(days=31)).timestamp())
                 user_session = User_Sessions(_user, _id, _random, expiry)
                 session.add(user_session)
@@ -103,10 +102,12 @@ def delete_user_session(user_id, session_key):
         log.exception(ex)
 
 
-def check_user_session(user_id, session_key):
+def check_user_session(user_id, session_key, random):
     try:
         found = session.query(User_Sessions).filter(User_Sessions.user_id==user_id,
-                                                    User_Sessions.session_key==session_key).one_or_none()
+                                                    User_Sessions.session_key==session_key,
+                                                    User_Sessions.random == random,
+                                                    ).one_or_none()
         if found is not None:
             new_expiry = int((datetime.datetime.now()  + datetime.timedelta(days=31)).timestamp())
             if new_expiry - found.expiry > 86400:
@@ -614,10 +615,13 @@ def migrate_Database(_session):
 def clean_database(_session):
     # Remove expired remote login tokens
     now = datetime.datetime.now()
+    try:
         _session.query(RemoteAuthToken).filter(now > RemoteAuthToken.expiration).\
             filter(RemoteAuthToken.token_type != 1).delete()
         _session.commit()
-
+    except exc.OperationalError:  # Database is not writeable
+        print('Settings database is not writeable. Exiting...')
+        sys.exit(2)
 
 
 # Save downloaded books per user in calibre-web's own database

cps/usermanagement.py

@@ -40,7 +40,6 @@ def verify_password(username, password):
         if user.name.lower() == "guest":
             if config.config_anonbrowse == 1:
                 return user
-        limiter.check()
         if config.config_login_type == constants.LOGIN_LDAP and services.ldap:
             login_result, error = services.ldap.bind_user(user.name, password)
             if login_result:
@@ -48,7 +47,9 @@ def verify_password(username, password):
                 return user
             if error is not None:
                 log.error(error)
-        elif check_password_hash(str(user.password), password):
+        else:
+            limiter.check()
+            if check_password_hash(str(user.password), password):
                 [limiter.limiter.storage.clear(k.key) for k in limiter.current_limits]
                 return user
     ip_address = request.headers.get('X-Forwarded-For', request.remote_addr)
@@ -127,10 +128,14 @@ def load_user_from_reverse_proxy_header(req):
 @lm.user_loader
 def load_user(user_id, random, session_key):
     user = ub.session.query(ub.User).filter(ub.User.id == int(user_id)).first()
-    if random and session_key:
+    if session_key:
         entry = ub.session.query(ub.User_Sessions).filter(ub.User_Sessions.random == random,
                                                           ub.User_Sessions.session_key == session_key).first()
         if not entry or entry.user_id != user.id:
             return None
+    elif random:
+        entry = ub.session.query(ub.User_Sessions).filter(ub.User_Sessions.random == random).first()
+        if not entry or entry.user_id != user.id:
+            return None
     return user