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#!/usr/libexec/platform-python
# SPDX-License-Identifier: LGPL-2.1-or-later
# Copyright (c) 2019 Red Hat, Inc.
# Copyright (c) 2019 Tomáš Mráz <tmraz@fedoraproject.org>
import argparse
import os
import sys
import warnings
import cryptopolicies
import policygenerators
RELOAD_CMD_NAME = 'reload-cmds.sh'
def eprint(*args, **kwargs):
print(*args, file=sys.stderr, **kwargs)
def parse_args():
"Parse the command line"
parser = argparse.ArgumentParser(allow_abbrev=False)
parser.add_argument('--flat', action='store_true',
help='put all the generated files in a single directory')
parser.add_argument('--test', action='store_true',
help='compare the generated config file with the existing one')
parser.add_argument('--policy', type=str, metavar='POLICY',
help='generate the specified policy only')
parser.add_argument('--reloadcmds', action='store_true',
help='also save reload cmds into reload-cmds.sh script in output directory')
parser.add_argument('--strict', action='store_true',
help='fail on warnings')
parser.add_argument('policydir',
help='a directory with base policy definition files (*.pol)')
parser.add_argument('outputdir',
help='a target directory with generated config files')
return parser.parse_args()
def save_config(cmdline, policy_name, config_name, config):
if cmdline.flat:
path = os.path.join(cmdline.outputdir, '{}-{}.txt'.format(policy_name, config_name))
else:
dirpath = os.path.join(cmdline.outputdir, policy_name)
if not os.path.isdir(dirpath):
try:
os.mkdir(dirpath)
except OSError:
eprint('Cannot create directory for policy {}'.format(policy_name))
return False
path = os.path.join(dirpath, config_name + '.txt')
if cmdline.test:
try:
with open(path, mode='r') as f:
old_config = f.read()
if old_config != config:
eprint('Config for {} for policy {} differs from the existing one'.format(config_name, policy_name))
return False
return True
except FileNotFoundError:
pass
except OSError:
eprint('Error reading generated file {}'.format(path))
return False
print('Saving config for {} for policy {}'.format(config_name, policy_name))
with open(path, mode='w') as f:
f.write(config)
print()
return True
def build_policy(cmdline, policy_name, subpolicy_names=None):
err = 0
if subpolicy_names is None:
subpolicy_names = []
try:
cp = cryptopolicies.UnscopedCryptoPolicy(policy_name,
*subpolicy_names,*subpolicy_names,
policydir=cmdline.policydir)
except ValueError as e: # TODO: catch specific thing
eprint('Error: ' + str(e))
return 1
generators = [g for g in dir(policygenerators) if 'Generator' in g]
for g in generators:
cls = policygenerators.__dict__[g]
gen = cls()
config = gen.generate_config(cp.scoped(gen.SCOPES))
if policy_name == 'EMPTY' or gen.test_config(config):
try:
name = ':'.join([policy_name, *subpolicy_names])
if not save_config(cmdline, name, gen.CONFIG_NAME, config):
err = 5
except OSError:
eprint('Error saving config for ' + gen.CONFIG_NAME)
eprint('Keeping original configuration')
err = 4
else:
eprint('Error testing config for ' + gen.CONFIG_NAME)
err = 3
return err
def save_reload_cmds(cmdline):
err = 0
generators = [g for g in dir(policygenerators) if 'Generator' in g]
path = os.path.join(cmdline.outputdir, RELOAD_CMD_NAME)
try:
with open(path, mode='w') as f:
for g in generators:
cls = policygenerators.__dict__[g]
f.write(cls.RELOAD_CMD)
except OSError:
eprint('Error saving reload cmds')
err = 6
return err
def main():
"The actual command implementation"
cmdline = parse_args()
err = 0
if cmdline.strict:
warnings.filterwarnings("error")
if cmdline.policy:
(policy_name, *subpolicy_names) = filter(None, cmdline.policy.upper().split(':'))
err = build_policy(cmdline, policy_name, subpolicy_names)
else:
with os.scandir(cmdline.policydir) as sd:
for i in sd:
if not i.name.startswith('.') and i.is_file():
(policy_name, ext) = os.path.splitext(i.name)
if ext == '.pol':
err = build_policy(cmdline, policy_name)
if err:
break
if not err and cmdline.reloadcmds:
err = save_reload_cmds(cmdline)
sys.exit(err)
# Entry point
if __name__ == "__main__":
main()