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59 lines
2.4 KiB
Python
59 lines
2.4 KiB
Python
#
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# This file is part of pretix (Community Edition).
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#
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# Copyright (C) 2014-2020 Raphael Michel and contributors
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# Copyright (C) 2020-2021 rami.io GmbH and contributors
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#
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# This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
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# Public License as published by the Free Software Foundation in version 3 of the License.
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#
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# ADDITIONAL TERMS APPLY: Pursuant to Section 7 of the GNU Affero General Public License, additional terms are
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# applicable granting you additional permissions and placing additional restrictions on your usage of this software.
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# Please refer to the pretix LICENSE file to obtain the full terms applicable to this work. If you did not receive
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# this file, see <https://pretix.eu/about/en/license>.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
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# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Affero General Public License along with this program. If not, see
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# <https://www.gnu.org/licenses/>.
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#
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import hashlib
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import time
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from django.conf import settings
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class SessionInvalid(Exception):
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pass
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class SessionReauthRequired(Exception):
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pass
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def get_user_agent_hash(request):
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return hashlib.sha256(request.headers['User-Agent'].encode()).hexdigest()
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def assert_session_valid(request):
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if not settings.PRETIX_LONG_SESSIONS or not request.session.get('pretix_auth_long_session', False):
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last_used = request.session.get('pretix_auth_last_used', time.time())
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if time.time() - request.session.get('pretix_auth_login_time',
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time.time()) > settings.PRETIX_SESSION_TIMEOUT_ABSOLUTE:
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request.session['pretix_auth_login_time'] = 0
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raise SessionInvalid()
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if time.time() - last_used > settings.PRETIX_SESSION_TIMEOUT_RELATIVE:
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raise SessionReauthRequired()
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if 'User-Agent' in request.headers:
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if 'pinned_user_agent' in request.session:
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if request.session.get('pinned_user_agent') != get_user_agent_hash(request):
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raise SessionInvalid()
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else:
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request.session['pinned_user_agent'] = get_user_agent_hash(request)
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request.session['pretix_auth_last_used'] = int(time.time())
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return True
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