ansible-later/ansiblelater/rules/CheckFilePermissionMissing.py

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# Copyright (c) 2020 Sorin Sbarnea <sorin.sbarnea@gmail.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
import re
from ansiblelater.standard import StandardBase
class CheckFilePermissionMissing(StandardBase):
sid = "ANSIBLE0018"
description = "File permissions unset or incorrect"
helptext = (
"`mode` parameter should set permissions explicitly (e.g. `mode: 0644`) "
"to avoid unexpected file permissions"
)
version = "0.2"
types = ["playbook", "task", "handler"]
_modules = {
"archive",
"assemble",
"copy",
"file",
"replace",
"template",
}
_create_modules = {
"blockinfile": False,
"htpasswd": True,
"ini_file": True,
"lineinfile": False,
}
_preserve_modules = (
"copy",
"template",
)
def check(self, candidate, settings):
tasks, errors = self.get_normalized_tasks(candidate, settings)
if not errors:
for task in tasks:
if self._check_mode(task):
errors.append(self.Error(task["__line__"], self.helptext))
return self.Result(candidate.path, errors)
def _check_mode(self, task):
module = task["action"]["__ansible_module__"]
mode = task["action"].get("mode", None)
state = task["action"].get("state", "file")
if module not in self._modules and module not in self._create_modules:
return False
if mode == "preserve" and module not in self._preserve_modules:
return True
if module in self._create_modules:
create = task["action"].get("create", self._create_modules[module])
return create and mode is None
# If Jinja syntax is used state can not be validated
jinja = re.compile("{{(.*?)}}")
if jinja.findall(state):
return False
# A file that doesn't exist cannot have a mode
if state == "absent":
return False
# A symlink always has mode 0o777
if state == "link":
return False
# Recurse on a directory does not allow for an uniform mode
if task["action"].get("recurse", None):
return False
# The file module does not create anything when state==file (default)
if module == "file" and state == "file":
return False
# replace module is the only one that has a valid default preserve
# behavior, but we want to trigger rule if user used incorrect
# documentation and put "preserve", which is not supported.
if module == "replace" and mode is None:
return False
return mode is None