4b98e30307
Add charmhelpers.contrib.hardening and calls to install, config-changed, upgrade-charm and update-status hooks. Also add new config option to allow one or more hardening modules to be applied at runtime. Change-Id: Icf48829e010d35d7d7a4ccd547eae6a8c511c04e
56 lines
2.1 KiB
Python
56 lines
2.1 KiB
Python
# Copyright 2016 Canonical Limited.
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#
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# This file is part of charm-helpers.
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#
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# charm-helpers is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License version 3 as
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# published by the Free Software Foundation.
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#
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# charm-helpers is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with charm-helpers. If not, see <http://www.gnu.org/licenses/>.
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from charmhelpers.contrib.hardening.audits.file import (
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DirectoryPermissionAudit,
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TemplatedFile,
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)
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from charmhelpers.contrib.hardening.host import TEMPLATES_DIR
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from charmhelpers.contrib.hardening import utils
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def get_audits():
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"""Get OS hardening security limits audits.
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:returns: dictionary of audits
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"""
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audits = []
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settings = utils.get_settings('os')
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# Ensure that the /etc/security/limits.d directory is only writable
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# by the root user, but others can execute and read.
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audits.append(DirectoryPermissionAudit('/etc/security/limits.d',
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user='root', group='root',
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mode=0o755))
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# If core dumps are not enabled, then don't allow core dumps to be
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# created as they may contain sensitive information.
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if not settings['security']['kernel_enable_core_dump']:
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audits.append(TemplatedFile('/etc/security/limits.d/10.hardcore.conf',
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SecurityLimitsContext(),
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template_dir=TEMPLATES_DIR,
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user='root', group='root', mode=0o0440))
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return audits
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class SecurityLimitsContext(object):
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def __call__(self):
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settings = utils.get_settings('os')
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ctxt = {'disable_core_dump':
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not settings['security']['kernel_enable_core_dump']}
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return ctxt
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