/usr/share/pyshared/radicale/auth/PAM.py is in python-radicale 0.8-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 | # -*- coding: utf-8 -*-
#
# This file is part of Radicale Server - Calendar Server
# Copyright © 2011 Henry-Nicolas Tourneur
#
# This library is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Radicale. If not, see <http://www.gnu.org/licenses/>.
"""
PAM authentication.
Authentication based on the ``pam-python`` module.
"""
import grp
import pam
import pwd
from .. import config, log
GROUP_MEMBERSHIP = config.get("auth", "pam_group_membership")
def is_authenticated(user, password):
"""Check if ``user``/``password`` couple is valid."""
# Check whether the user exists in the PAM system
try:
pwd.getpwnam(user).pw_uid
except KeyError:
log.LOGGER.debug("User %s not found" % user)
return False
else:
log.LOGGER.debug("User %s found" % user)
# Check whether the group exists
try:
members = grp.getgrnam(GROUP_MEMBERSHIP).gr_mem
except KeyError:
log.LOGGER.debug(
"The PAM membership required group (%s) doesn't exist" %
GROUP_MEMBERSHIP)
return False
# Check whether the user belongs to the required group
for member in members:
if member == user:
log.LOGGER.debug(
"The PAM user belongs to the required group (%s)" %
GROUP_MEMBERSHIP)
# Check the password
if pam.authenticate(user, password):
return True
else:
log.LOGGER.debug("Wrong PAM password")
break
else:
log.LOGGER.debug(
"The PAM user doesn't belong to the required group (%s)" %
GROUP_MEMBERSHIP)
return False
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