csrf tokens and web security #141761
Replies: 5 comments
-
Hello @bily-yen, This problem typically arises due to how Flask handles sessions and cookies, especially when accessed via different domains or IP addresses. Here's why:
Solution1. Ensure Secret Key is SetThe SECRET_KEY is crucial for session management and CSRF protection.
Replace 'your_secret_key_here' with a secure, random string. 2. Configure Session Cookie DomainSet the SESSION_COOKIE_DOMAIN configuration to include your IP address.
This tells Flask to set the session cookie for the specified domain. 3. Use SERVER_NAME ConfigurationSetting SERVER_NAME helps Flask understand what domain it's running on.
Note: Setting SERVER_NAME can affect URL generation and routing, so use it carefully. 4. Update CSRF Trusted OriginsIf you're using Flask-WTF version 0.15 or newer, you can specify trusted origins for CSRF protection.
This allows CSRF tokens to be accepted from the specified IP address. |
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-
Thank you so much,i am humbled to communicate with you despite the
constraints of geographical and demographic differences, Yes,please further
scrutinize my app title the flask-web-app-tutorial and see why it is not
working for device ip incase i am unable to solve it,as a junior
developer,it is motivating to work with new people of profound experience
…On Thu, Oct 17, 2024 at 12:35 PM Tom ***@***.***> wrote:
Hello @bily-yen <https://github.com/bily-yen>,
This problem typically arises due to how Flask handles sessions and
cookies, especially when accessed via different domains or IP addresses.
Here's why:
-
Session Cookies: Flask uses cookies to manage user sessions. These
cookies are domain-specific, meaning they are tied to the domain or IP
address used to access the application.
-
CSRF Tokens: Flask-WTF (Flask's integration with WTForms) uses CSRF
tokens to protect against Cross-Site Request Forgery attacks. The CSRF
token is stored in the user's session.
-
Domain Differences: When you access your app via localhost, the
browser correctly sends the session cookie. But when you access it via your
device's IP address, the browser treats it as a different domain and may
not send or accept the session cookie, leading to the missing CSRF token
error.
Solution 1. Ensure Secret Key is Set
The SECRET_KEY is crucial for session management and CSRF protection.
app = Flask(__name__)
app.config['SECRET_KEY'] = 'your_secret_key_here'
Replace 'your_secret_key_here' with a secure, random string.
Ensure that the secret key is set before initializing any extensions like
Flask-WTF.
2. Configure Session Cookie Domain
Set the SESSION_COOKIE_DOMAIN configuration to include your IP address.
app.config['SESSION_COOKIE_DOMAIN'] = '192.168.x.x' # Replace with your actual IP
This tells Flask to set the session cookie for the specified domain.
3. Use SERVER_NAME Configuration
Setting SERVER_NAME helps Flask understand what domain it's running on.
app.config['SERVER_NAME'] = '192.168.x.x:5000' # Replace with your IP and port
Note: Setting SERVER_NAME can affect URL generation and routing, so use it
carefully.
4. Update CSRF Trusted Origins
If you're using Flask-WTF version 0.15 or newer, you can specify trusted
origins for CSRF protection.
app.config['WTF_CSRF_TRUSTED_ORIGINS'] = ['http://192.168.x.x:5000']
This allows CSRF tokens to be accepted from the specified IP address.
—
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-
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_login import LoginManager
from flask_socketio import SocketIO # Import SocketIO
import pymysql
import urllib.parse
import os
from flask_limiter import Limiter
from flask_limiter.util import get_remote_address
from logging.handlers import RotatingFileHandler
import logging
import locale
from flask_cors import CORS
from flask_wtf import CSRFProtect
from flask_migrate import Migrate
# Initialize extensions globally
db = SQLAlchemy()
login_manager = LoginManager()
csrf = CSRFProtect()
limiter = Limiter(
key_func=get_remote_address,
storage_uri='redis://localhost:6379/0'
)
socketio = SocketIO() # Initialize SocketIO
def create_app():
app = Flask(__name__)
# Load configurations
DB_USER = os.environ.get('DB_USER', 'root')
DB_PASSWORD = urllib.parse.quote(os.environ.get('MYSQL_PASSWORD',
'password'))
DB_HOST = os.environ.get('DB_HOST', 'localhost')
DB_NAME = os.environ.get('DB_NAME', 'credentials')
DB_NAME_TONERS = os.environ.get('DB_NAME_TONERS', 'toners')
SECRET_KEY = os.environ.get('FLASK_SECRET_KEY',
'your_default_secret_key')
UPLOAD_FOLDER = r'static/SPAPHOTOS' # Use a relative path for the
upload folder
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
app.config['MAX_CONTENT_LENGTH'] = 16 * 1024 * 1024
ALLOWED_EXTENSIONS = {'png', 'jpg', 'jpeg', 'gif', 'webp'}
def allowed_file(filename):
return '.' in filename and filename.rsplit('.', 1)[1].lower() in
ALLOWED_EXTENSIONS
app.config.update(
SECRET_KEY=SECRET_KEY,
DEBUG=os.environ.get('FLASK_DEBUG', 'false').lower() in ['true', '1',
't', 'y', 'yes'],
SQLALCHEMY_DATABASE_URI=f'mysql+pymysql://{DB_USER}:{DB_PASSWORD}@{
DB_HOST}/{DB_NAME}',
SQLALCHEMY_BINDS={
'toners': f'mysql+pymysql://{DB_USER}:{DB_PASSWORD}@{DB_HOST}/{
DB_NAME_TONERS}'
},
SQLALCHEMY_TRACK_MODIFICATIONS=False,
SESSION_COOKIE_SECURE=not app.debug,
SESSION_COOKIE_HTTPONLY=True,
SESSION_COOKIE_SAMESITE='Lax', # Use 'Lax' for a wider range of
scenarios
SESSION_COOKIE_DOMAIN='10.0.6.144', # Set the cookie domain
CSRF_ENABLED=True,
CSRF_COOKIE_SECURE=not app.debug,
CSRF_COOKIE_SAMESITE='Lax', # Use 'Lax' for a wider range of
scenarios
CSRF_COOKIE_DOMAIN='10.0.6.144', # Set the CSRF cookie domain
SERVER_NAME='10.0.6.144:5001', # Set the server name for routing
WTF_CSRF_TRUSTED_ORIGINS=['http://10.0.6.144:5001'], # Allow CSRF
tokens from this origin
)
# Set up logging
handler = logging.StreamHandler()
handler.setFormatter(logging.Formatter('%(asctime)s - %(name)s -
%(levelname)s - %(message)s'))
if not app.debug:
file_handler = RotatingFileHandler('app.log', maxBytes=100000,
backupCount=1)
file_handler.setLevel(logging.INFO)
file_handler.setFormatter(logging.Formatter('%(asctime)s - %(name)s
- %(levelname)s - %(message)s'))
app.logger.addHandler(file_handler)
else:
handler.setLevel(logging.DEBUG)
app.logger.addHandler(handler)
app.logger.setLevel(logging.DEBUG)
# Initialize extensions
db.init_app(app)
migrate = Migrate(app, db)
csrf.init_app(app)
login_manager.login_view = 'auth.login'
login_manager.init_app(app)
limiter.init_app(app)
# Initialize SocketIO with the Flask app
socketio.init_app(app)
# Enable CORS with credentials support
CORS(app, supports_credentials=True)
# Import blueprints and register them
from .views import views
from .auth import auth
app.register_blueprint(views, url_prefix='/')
app.register_blueprint(auth, url_prefix='/')
# Import models and create database tables
from .models import User, Note, LoanRecord
with app.app_context():
db.create_all()
# User loader for Flask-Login
@login_manager.user_loader
def load_user(user_id):
return User.query.get(int(user_id))
# Set locale for currency formatting
locale.setlocale(locale.LC_ALL, '')
def currency(value):
try:
return locale.currency(value, grouping=True)
except (ValueError, TypeError):
return value
# Register the custom currency filter
app.jinja_env.filters['currency'] = currency
return app, socketio # Return both app and socketio
with this still no progress
…On Thu, Oct 17, 2024 at 1:41 PM Bily okwaro ***@***.***> wrote:
Thank you so much,i am humbled to communicate with you despite the
constraints of geographical and demographic differences, Yes,please further
scrutinize my app title the flask-web-app-tutorial and see why it is not
working for device ip incase i am unable to solve it,as a junior
developer,it is motivating to work with new people of profound experience
On Thu, Oct 17, 2024 at 12:35 PM Tom ***@***.***> wrote:
> Hello @bily-yen <https://github.com/bily-yen>,
>
> This problem typically arises due to how Flask handles sessions and
> cookies, especially when accessed via different domains or IP addresses.
> Here's why:
>
> -
>
> Session Cookies: Flask uses cookies to manage user sessions. These
> cookies are domain-specific, meaning they are tied to the domain or IP
> address used to access the application.
> -
>
> CSRF Tokens: Flask-WTF (Flask's integration with WTForms) uses CSRF
> tokens to protect against Cross-Site Request Forgery attacks. The CSRF
> token is stored in the user's session.
> -
>
> Domain Differences: When you access your app via localhost, the
> browser correctly sends the session cookie. But when you access it via your
> device's IP address, the browser treats it as a different domain and may
> not send or accept the session cookie, leading to the missing CSRF token
> error.
>
> Solution 1. Ensure Secret Key is Set
>
> The SECRET_KEY is crucial for session management and CSRF protection.
>
> app = Flask(__name__)
> app.config['SECRET_KEY'] = 'your_secret_key_here'
>
> Replace 'your_secret_key_here' with a secure, random string.
> Ensure that the secret key is set before initializing any extensions like
> Flask-WTF.
> 2. Configure Session Cookie Domain
>
> Set the SESSION_COOKIE_DOMAIN configuration to include your IP address.
>
> app.config['SESSION_COOKIE_DOMAIN'] = '192.168.x.x' # Replace with your actual IP
>
> This tells Flask to set the session cookie for the specified domain.
> 3. Use SERVER_NAME Configuration
>
> Setting SERVER_NAME helps Flask understand what domain it's running on.
>
> app.config['SERVER_NAME'] = '192.168.x.x:5000' # Replace with your IP and port
>
> Note: Setting SERVER_NAME can affect URL generation and routing, so use
> it carefully.
> 4. Update CSRF Trusted Origins
>
> If you're using Flask-WTF version 0.15 or newer, you can specify trusted
> origins for CSRF protection.
>
> app.config['WTF_CSRF_TRUSTED_ORIGINS'] = ['http://192.168.x.x:5000']
>
> This allows CSRF tokens to be accepted from the specified IP address.
>
> —
> Reply to this email directly, view it on GitHub
> <#141761 (comment)>,
> or unsubscribe
> <https://github.com/notifications/unsubscribe-auth/BDNIPDWODMOEIZSTVJ2KAH3Z36AFJAVCNFSM6AAAAABQDHYDUGVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTAOJWHEZDQMQ>
> .
> You are receiving this because you were mentioned.Message ID:
> ***@***.***
> com>
>
|
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-
Guys help me write a financial implications for a system,i have never
really written before and i got this rare opportunity
…On Thu, Oct 17, 2024 at 2:01 PM Bily okwaro ***@***.***> wrote:
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_login import LoginManager
from flask_socketio import SocketIO # Import SocketIO
import pymysql
import urllib.parse
import os
from flask_limiter import Limiter
from flask_limiter.util import get_remote_address
from logging.handlers import RotatingFileHandler
import logging
import locale
from flask_cors import CORS
from flask_wtf import CSRFProtect
from flask_migrate import Migrate
# Initialize extensions globally
db = SQLAlchemy()
login_manager = LoginManager()
csrf = CSRFProtect()
limiter = Limiter(
key_func=get_remote_address,
storage_uri='redis://localhost:6379/0'
)
socketio = SocketIO() # Initialize SocketIO
def create_app():
app = Flask(__name__)
# Load configurations
DB_USER = os.environ.get('DB_USER', 'root')
DB_PASSWORD = urllib.parse.quote(os.environ.get('MYSQL_PASSWORD',
'password'))
DB_HOST = os.environ.get('DB_HOST', 'localhost')
DB_NAME = os.environ.get('DB_NAME', 'credentials')
DB_NAME_TONERS = os.environ.get('DB_NAME_TONERS', 'toners')
SECRET_KEY = os.environ.get('FLASK_SECRET_KEY',
'your_default_secret_key')
UPLOAD_FOLDER = r'static/SPAPHOTOS' # Use a relative path for the
upload folder
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
app.config['MAX_CONTENT_LENGTH'] = 16 * 1024 * 1024
ALLOWED_EXTENSIONS = {'png', 'jpg', 'jpeg', 'gif', 'webp'}
def allowed_file(filename):
return '.' in filename and filename.rsplit('.', 1)[1].lower() in
ALLOWED_EXTENSIONS
app.config.update(
SECRET_KEY=SECRET_KEY,
DEBUG=os.environ.get('FLASK_DEBUG', 'false').lower() in ['true',
'1', 't', 'y', 'yes'],
SQLALCHEMY_DATABASE_URI=f'mysql+pymysql://{DB_USER}:{DB_PASSWORD}@
{DB_HOST}/{DB_NAME}',
SQLALCHEMY_BINDS={
'toners': f'mysql+pymysql://{DB_USER}:{DB_PASSWORD}@{DB_HOST}/
{DB_NAME_TONERS}'
},
SQLALCHEMY_TRACK_MODIFICATIONS=False,
SESSION_COOKIE_SECURE=not app.debug,
SESSION_COOKIE_HTTPONLY=True,
SESSION_COOKIE_SAMESITE='Lax', # Use 'Lax' for a wider range of
scenarios
SESSION_COOKIE_DOMAIN='10.0.6.144', # Set the cookie domain
CSRF_ENABLED=True,
CSRF_COOKIE_SECURE=not app.debug,
CSRF_COOKIE_SAMESITE='Lax', # Use 'Lax' for a wider range of
scenarios
CSRF_COOKIE_DOMAIN='10.0.6.144', # Set the CSRF cookie domain
SERVER_NAME='10.0.6.144:5001', # Set the server name for routing
WTF_CSRF_TRUSTED_ORIGINS=['http://10.0.6.144:5001'], # Allow
CSRF tokens from this origin
)
# Set up logging
handler = logging.StreamHandler()
handler.setFormatter(logging.Formatter('%(asctime)s - %(name)s -
%(levelname)s - %(message)s'))
if not app.debug:
file_handler = RotatingFileHandler('app.log', maxBytes=100000,
backupCount=1)
file_handler.setLevel(logging.INFO)
file_handler.setFormatter(logging.Formatter('%(asctime)s -
%(name)s - %(levelname)s - %(message)s'))
app.logger.addHandler(file_handler)
else:
handler.setLevel(logging.DEBUG)
app.logger.addHandler(handler)
app.logger.setLevel(logging.DEBUG)
# Initialize extensions
db.init_app(app)
migrate = Migrate(app, db)
csrf.init_app(app)
login_manager.login_view = 'auth.login'
login_manager.init_app(app)
limiter.init_app(app)
# Initialize SocketIO with the Flask app
socketio.init_app(app)
# Enable CORS with credentials support
CORS(app, supports_credentials=True)
# Import blueprints and register them
from .views import views
from .auth import auth
app.register_blueprint(views, url_prefix='/')
app.register_blueprint(auth, url_prefix='/')
# Import models and create database tables
from .models import User, Note, LoanRecord
with app.app_context():
db.create_all()
# User loader for Flask-Login
@login_manager.user_loader
def load_user(user_id):
return User.query.get(int(user_id))
# Set locale for currency formatting
locale.setlocale(locale.LC_ALL, '')
def currency(value):
try:
return locale.currency(value, grouping=True)
except (ValueError, TypeError):
return value
# Register the custom currency filter
app.jinja_env.filters['currency'] = currency
return app, socketio # Return both app and socketio
with this still no progress
On Thu, Oct 17, 2024 at 1:41 PM Bily okwaro ***@***.***>
wrote:
> Thank you so much,i am humbled to communicate with you despite the
> constraints of geographical and demographic differences, Yes,please further
> scrutinize my app title the flask-web-app-tutorial and see why it is not
> working for device ip incase i am unable to solve it,as a junior
> developer,it is motivating to work with new people of profound experience
>
>
>
> On Thu, Oct 17, 2024 at 12:35 PM Tom ***@***.***> wrote:
>
>> Hello @bily-yen <https://github.com/bily-yen>,
>>
>> This problem typically arises due to how Flask handles sessions and
>> cookies, especially when accessed via different domains or IP addresses.
>> Here's why:
>>
>> -
>>
>> Session Cookies: Flask uses cookies to manage user sessions. These
>> cookies are domain-specific, meaning they are tied to the domain or IP
>> address used to access the application.
>> -
>>
>> CSRF Tokens: Flask-WTF (Flask's integration with WTForms) uses CSRF
>> tokens to protect against Cross-Site Request Forgery attacks. The CSRF
>> token is stored in the user's session.
>> -
>>
>> Domain Differences: When you access your app via localhost, the
>> browser correctly sends the session cookie. But when you access it via your
>> device's IP address, the browser treats it as a different domain and may
>> not send or accept the session cookie, leading to the missing CSRF token
>> error.
>>
>> Solution 1. Ensure Secret Key is Set
>>
>> The SECRET_KEY is crucial for session management and CSRF protection.
>>
>> app = Flask(__name__)
>> app.config['SECRET_KEY'] = 'your_secret_key_here'
>>
>> Replace 'your_secret_key_here' with a secure, random string.
>> Ensure that the secret key is set before initializing any extensions
>> like Flask-WTF.
>> 2. Configure Session Cookie Domain
>>
>> Set the SESSION_COOKIE_DOMAIN configuration to include your IP address.
>>
>> app.config['SESSION_COOKIE_DOMAIN'] = '192.168.x.x' # Replace with your actual IP
>>
>> This tells Flask to set the session cookie for the specified domain.
>> 3. Use SERVER_NAME Configuration
>>
>> Setting SERVER_NAME helps Flask understand what domain it's running on.
>>
>> app.config['SERVER_NAME'] = '192.168.x.x:5000' # Replace with your IP and port
>>
>> Note: Setting SERVER_NAME can affect URL generation and routing, so use
>> it carefully.
>> 4. Update CSRF Trusted Origins
>>
>> If you're using Flask-WTF version 0.15 or newer, you can specify trusted
>> origins for CSRF protection.
>>
>> app.config['WTF_CSRF_TRUSTED_ORIGINS'] = ['http://192.168.x.x:5000']
>>
>> This allows CSRF tokens to be accepted from the specified IP address.
>>
>> —
>> Reply to this email directly, view it on GitHub
>> <#141761 (comment)>,
>> or unsubscribe
>> <https://github.com/notifications/unsubscribe-auth/BDNIPDWODMOEIZSTVJ2KAH3Z36AFJAVCNFSM6AAAAABQDHYDUGVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTAOJWHEZDQMQ>
>> .
>> You are receiving this because you were mentioned.Message ID:
>> ***@***.***
>> com>
>>
>
|
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-
Hi Billy! It sounds like you're running into an issue where CSRF tokens aren't being properly generated or recognized when logging in from your device's IP. When using localhost, the session tokens are probably managed smoothly, but switching to your device's IP might require proper configuration of the session cookies. Make sure that you're setting your CSRF tokens correctly and that the IP address is properly recognized by your Flask app. Also, check your Flask session settings, especially around cross-origin access. If you're looking to deepen your understanding, web developer courses often cover topics like CSRF protection in detail. |
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Body
Hello guys,My name is billy and this is my first attempt to network with brillian people in this space.Guys i have worked with csrf tokens for the project flask-web-app-tutorial,but i get the error csrf session token is missing when i try logging in with device ip,with localhost its just works fine
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