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# Copyright 2016 Canonical Limited.
#
# This file is part of charm-helpers.
#
# charm-helpers is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License version 3 as
# published by the Free Software Foundation.
#
# charm-helpers 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with charm-helpers. If not, see <http://www.gnu.org/licenses/>.
from charmhelpers.contrib.hardening.audits.file import (
DirectoryPermissionAudit,
TemplatedFile,
)
from charmhelpers.contrib.hardening.host import TEMPLATES_DIR
from charmhelpers.contrib.hardening import utils
def get_audits():
"""Get OS hardening security limits audits.
:returns: dictionary of audits
"""
audits = []
settings = utils.get_settings('os')
# Ensure that the /etc/security/limits.d directory is only writable
# by the root user, but others can execute and read.
audits.append(DirectoryPermissionAudit('/etc/security/limits.d',
user='root', group='root',
mode=0o755))
# If core dumps are not enabled, then don't allow core dumps to be
# created as they may contain sensitive information.
if not settings['security']['kernel_enable_core_dump']:
audits.append(TemplatedFile('/etc/security/limits.d/10.hardcore.conf',
SecurityLimitsContext(),
template_dir=TEMPLATES_DIR,
user='root', group='root', mode=0o0440))
return audits
class SecurityLimitsContext(object):
def __call__(self):
settings = utils.get_settings('os')
ctxt = {'disable_core_dump':
not settings['security']['kernel_enable_core_dump']}
return ctxt
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