prevent password changing for ldap users (they get redirected to the ldap self service instead)
parent
f48f78997c
commit
734bed2092
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@ -10,6 +10,7 @@ from flask_security import Security, SQLAlchemyUserDatastore, auth_required, has
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from flask_security.models import fsqla_v2 as fsqla
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from flask_security.forms import LoginForm, Required, PasswordField
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from flask_security.utils import find_user
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from flask_security.views import change_password
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from flask_mail import Mail
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from email_validator import validate_email
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@ -162,7 +163,7 @@ def create_application(config):
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pass
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class User(db.Model, fsqla.FsUserMixin):
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username = db.Column(db.String(255))
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pass
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# LDAP
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ldap_server = ldap3.Server(config.ldap_url)
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@ -228,45 +229,61 @@ def create_application(config):
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# search for user in the current database
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user = find_user(self.email.data)
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if user is not None:
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# if a user is found we use that username for LDAP authentication
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username = user.username
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# if a user is found we check if it is associated with LDAP or with the local database
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if user.has_role('local'):
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# try authorizing locally using Flask security user datastore
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authorized = super(ExtendedLoginForm, self).validate()
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if authorized:
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logger.info(f"User with credentials '{self.email.data}' authorized through local database")
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else:
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# run LDAP authorization
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# if the authorization succeeds we also get the new_user_data dict which contains information about
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# the user's permissions etc.
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authorized, new_user_data = validate_ldap(user.username, self.password.data)
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if authorized:
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logger.info(f"User with credentials '{self.email.data}' authorized through LDAP")
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# update permissions and password/email to stay up to date for login with no network connection
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user.email = new_user_data['email']
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user.password = new_user_data['password']
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for role in new_user_data['roles']:
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user_datastore.add_role_to_user(user, role)
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user_datastore.commit()
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self.user = user
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else:
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self.password.errors = ['Invalid password']
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else:
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# this means there is no user with that email in the database
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# we assume that the username was entered instead of an email and use that for authentication with LDAP
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username = self.email.data
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# run LDAP authorization
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# if the authorization succeeds we also get the new_user_data dict which contains information about the
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# user's permissions etc.
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authorized, new_user_data = validate_ldap(username, self.password.data)
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if authorized:
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if user is None:
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# if there was no user in the database before we create a new user
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user_datastore.create_user(username=new_user_data['username'], email=new_user_data['email'],
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password=new_user_data['password'], roles=new_user_data['roles'])
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logger.info(f"New admin user '{new_user_data['username']} <{new_user_data['email']}>' created after"
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" successful LDAP authorization")
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else: # for existing users we update permissions and password/email to stay up to date
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user.email = new_user_data['email']
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user.password = new_user_data['password']
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for role in new_user_data['roles']:
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user_datastore.add_role_to_user(user, role)
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user_datastore.commit()
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self.user = find_user(self.email.data)
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logger.info(f"User with credentials '{self.email.data}' authorized through LDAP")
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if not authorized:
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# try authorizing locally using Flask security user datastore
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authorized = super(ExtendedLoginForm, self).validate()
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# try LDAP authorization and create a new user if it succeeds
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authorized, new_user_data = validate_ldap(username, self.password.data)
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if authorized:
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logger.info(f"User with credentials '{self.email.data}' authorized through local database")
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# if there was no user in the database before we create a new user
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self.user = user_datastore.create_user(username=new_user_data['username'], email=new_user_data['email'],
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password=new_user_data['password'], roles=new_user_data['roles'])
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user_datastore.commit()
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logger.info(f"New admin user '{new_user_data['username']} <{new_user_data['email']}>' created after"
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" successful LDAP authorization")
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# if any of the authorization methods is successful we authorize the user
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return authorized
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# we override the change_password view from flask security to only allow local users to change their passwords
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# LDAP users should use the LDAP self service for changing passwords
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# this route needs to be defined before the Flask Security setup
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@app.route('/change', methods=['GET', 'POST'])
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@auth_required()
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def change_pw():
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if current_user.has_role('local'):
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# local users can change their password
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return change_password()
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else:
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# LDAP users get redirected to the LDAP self service
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return redirect('https://ldap.imaginaerraum.de/')
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# Setup Flask-Security
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user_datastore = SQLAlchemyUserDatastore(db, User, Role)
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security = Security(app, user_datastore, login_form=ExtendedLoginForm)
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@ -686,29 +703,35 @@ def create_application(config):
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else:
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# store data for new admins in memory s.t. the file can be deleted afterwards
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with open(config.admin_file) as f:
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for i, d in enumerate(f.readlines()):
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try:
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user, email, pw = d.split()
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validate_email(email)
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new_admin_data.append({'username': user, 'email': email, 'password': pw})
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except Exception as e:
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print(
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f"Error while parsing line {i} in admin config file. Config file should contain lines of "
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f"'<username> <email> <password>\\n'\n Exception: {e}\nAdmin account could not be created.")
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for i, line in enumerate(f.readlines()):
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if not line.strip().startswith('#'):
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try:
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user, email, pw = line.split()
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validate_email(email)
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new_admin_data.append({'username': user, 'email': email, 'password': pw})
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except Exception as e:
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print(
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f"Error while parsing line {i} in admin config file. Config file should contain lines of "
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f"'<username> <email> <password>\\n'\n Exception: {e}\nAdmin account could not be created.")
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# create admin users (only if they don't exists already)
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def create_super_admins(new_admin_data):
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db.create_all()
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super_admin_role = user_datastore.find_or_create_role('super_admin') # root admin = can create other admins
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admin_role = user_datastore.find_or_create_role('admin') # 'normal' admin
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local_role = user_datastore.find_or_create_role('local') # LDAP user or local user
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for d in new_admin_data:
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if user_datastore.find_user(email=d['email'], username=d['username']) is None:
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logger.info(f"New super admin user created with username '{d['username']}' and email '{d['email']}'")
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roles = [super_admin_role, admin_role]
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if not d['password'] == 'LDAP':
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roles.append(local_role)
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logger.info(f"New super admin user created with username '{d['username']}' and email '{d['email']}', roles = {[r.name for r in roles]}")
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# create new admin (only if admin does not already exist)
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new_admin = user_datastore.create_user(email=d['email'], username=d['username'],
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password=hash_password(d['password']),
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roles=[super_admin_role, admin_role])
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roles=roles)
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db.session.commit()
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create_super_admins(new_admin_data)
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