from typing import Optional, Set, List, Dict, Any, Callable, Union
[docs]
def generate_csrf_token(session_id: Optional[str] = None) -> str:
"""
Generate a CSRF token for the given session ID.
Args:
session_id: The session ID to generate the token for.
Returns:
str: The generated CSRF token.
"""
# Implementation
return ""
[docs]
def verify_csrf_token(token: str, session_id: Optional[str] = None) -> bool:
"""
Verify that the given CSRF token is valid for the session.
Args:
token: The CSRF token to verify.
session_id: The session ID to verify the token against.
Returns:
bool: True if the token is valid, False otherwise.
"""
# Implementation
return True
[docs]
class CSRFProtection:
"""
Class that provides CSRF protection middleware and utilities.
"""
def __init__(
self,
secret_key: str,
cookie_name: str = "csrf_token",
header_name: str = "X-CSRF-Token",
form_field_name: str = "csrf_token",
exempt_methods: Optional[Set[str]] = None,
exempt_routes: Optional[List[str]] = None,
token_expiry: int = 3600
):
"""
Initialize the CSRF protection middleware.
Args:
secret_key: The secret key used to sign CSRF tokens.
cookie_name: The name of the cookie to store the CSRF token in.
header_name: The name of the header to look for the CSRF token in.
form_field_name: The name of the form field to look for the CSRF token in.
exempt_methods: HTTP methods that are exempt from CSRF protection.
exempt_routes: Routes that are exempt from CSRF protection.
token_expiry: How long CSRF tokens are valid for, in seconds.
"""
self.secret_key = secret_key
self.cookie_name = cookie_name
self.header_name = header_name
self.form_field_name = form_field_name
self.exempt_methods = exempt_methods or {"GET", "HEAD", "OPTIONS"}
self.exempt_routes = exempt_routes or []
self.token_expiry = token_expiry