86 lines
3.3 KiB
Python
86 lines
3.3 KiB
Python
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# -*- encoding: utf8 -*-
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#
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# The Qubes OS Project, http://www.qubes-os.org
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#
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# Copyright (C) 2017 Marek Marczykowski-Górecki
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# <marmarek@invisiblethingslab.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program 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 General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, see <http://www.gnu.org/licenses/>.
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import argparse
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import logging
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import logging.handlers
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import sys
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import qubespolicy
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parser = argparse.ArgumentParser(description="Evaluate qrexec policy")
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parser.add_argument("--assume-yes-for-ask", action="store_true",
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dest="assume_yes_for_ask", default=False,
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help="Allow run of service without confirmation if policy say 'ask'")
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parser.add_argument("--just-evaluate", action="store_true",
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dest="just_evaluate", default=False,
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help="Do not run the service, only evaluate policy; "
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"retcode=0 means 'allow'")
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parser.add_argument('domain_id', metavar='src-domain-id',
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help='Source domain ID (Xen ID or similar, not Qubes ID)')
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parser.add_argument('domain', metavar='src-domain-name',
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help='Source domain name')
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parser.add_argument('target', metavar='dst-domain-name',
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help='Target domain name')
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parser.add_argument('service_name', metavar='service-name',
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help='Service name')
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parser.add_argument('process_ident', metavar='process-ident',
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help='Qrexec process identifier - for connecting data channel')
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def main(args=None):
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args = parser.parse_args(args)
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# Add source domain information, required by qrexec-client for establishing
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# connection
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caller_ident = args.process_ident + "," + args.domain + "," + args.domain_id
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log = logging.getLogger('qubespolicy')
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log.setLevel(logging.INFO)
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handler = logging.handlers.SysLogHandler(address='/dev/log')
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log.addHandler(handler)
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log_prefix = 'qrexec: {}: {} -> {}: '.format(
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args.service_name, args.domain, args.target)
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try:
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system_info = qubespolicy.get_system_info()
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except qubespolicy.QubesMgmtException as e:
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log.error(log_prefix + 'error getting system info: ' + str(e))
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return 1
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try:
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policy = qubespolicy.Policy(args.service_name)
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action = policy.evaluate(system_info, args.domain, args.target)
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if action.action == qubespolicy.Action.ask:
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#(... ask the user, see action.targets_for_ask ...)
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# TODO: this is placeholder
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#action.handle_user_response(response, target_chosen_by_user)
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action.handle_user_response(False)
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log.info(log_prefix + 'allowed')
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action.execute(caller_ident)
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except qubespolicy.PolicySyntaxError as e:
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log.error(log_prefix + 'error loading policy: ' + str(e))
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return 1
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except qubespolicy.AccessDenied as e:
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log.info(log_prefix + 'denied: ' + str(e))
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return 1
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return 0
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if __name__ == '__main__':
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sys.exit(main())
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