o [h @sldZddlmZddlZddlZddlmZddlmZmZddl m Z dd l m Z d Z Gd d d e ZdS) 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. )unicode_literalsN)sha1)datetime timedelta)ValidationError)CSRF) SessionCSRFcsPeZdZdZfddZddZddZdd Zed d Z ed d Z Z S)r z %Y%m%d%H%M%Scs|j|_tt||S)N)meta form_metasuperr setup_form)selfform __class__{/home/ubuntu/experiments/live_experiments/Pythonexperiments/Otree/venv/lib/python3.10/site-packages/wtforms/csrf/session.pyr szSessionCSRF.setup_formcCs|j}|jdur td|jdurtd|j}d|vr'ttd |d<|j r>| |j  |j }d|d|f}nd}|d}tj|j|dtd}d || fS) Nzs