o Df @shdZddlZddlZddlmZddlmZddlmZddlmZdd l m Z d Z Gd d d e Z dS) a A provided CSRF implementation which puts CSRF data in a session. This can be used fairly comfortably with many `request.session` type objects, including the Werkzeug/Flask session store, Django sessions, and potentially other similar objects which use a dict-like API for storing session keys. The basic concept is a randomly generated value is stored in the user's session, and an hmac-sha1 of it (along with an optional expiration time, for extra security) is used as the value of the csrf_token. If this token validates with the hmac of the random value + expiration time, and the expiration time is not passed, the CSRF validation will pass. N)datetime) timedelta)sha1)ValidationError)CSRF) SessionCSRFcsPeZdZdZfddZddZddZdd Zed d Z ed d Z Z S)r z %Y%m%d%H%M%Scs|j|_t|S)N)meta form_metasuper setup_form)selfform __class__M/home/ubuntu/webapp/venv/lib/python3.10/site-packages/wtforms/csrf/session.pyr s zSessionCSRF.setup_formcCs|j}|jdur td|jdurtd|j}d|vr'ttd |d<|j r>| |j  |j }d|d|}nd}|d}tj|j|dtd}|d | S) Nzs