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ansible/library/packaging/apt_key

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Python
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#!/usr/bin/python
# -*- coding: utf-8 -*-
# (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>
# (c) 2012, Jayson Vantuyl <jayson@aggressive.ly>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
DOCUMENTATION = '''
---
module: apt_key
author: Jayson Vantuyl & others
version_added: "1.0"
short_description: Add or remove an apt key
description:
- Add or remove an I(apt) key, optionally downloading it
notes:
- doesn't download the key unless it really needs it
- as a sanity check, downloaded key id must match the one specified
- best practice is to specify the key id and the url
options:
id:
required: false
default: none
description:
- identifier of key
data:
required: false
default: none
description:
- keyfile contents
file:
required: false
default: none
description:
- keyfile path
keyring:
required: false
default: none
description:
- path to specific keyring file in /etc/apt/trusted.gpg.d
version_added: "1.3"
url:
required: false
default: none
description:
- url to retrieve key from.
keyserver:
version_added: "1.6"
required: false
default: none
description:
- keyserver to retrieve key from.
state:
required: false
choices: [ absent, present ]
default: present
description:
- used to specify if key is being added or revoked
validate_certs:
description:
- If C(no), SSL certificates for the target url will not be validated. This should only be used
on personally controlled sites using self-signed certificates.
required: false
default: 'yes'
choices: ['yes', 'no']
'''
EXAMPLES = '''
# Add an Apt signing key, uses whichever key is at the URL
- apt_key: url=https://ftp-master.debian.org/keys/archive-key-6.0.asc state=present
# Add an Apt signing key, will not download if present
- apt_key: id=473041FA url=https://ftp-master.debian.org/keys/archive-key-6.0.asc state=present
# Remove an Apt signing key, uses whichever key is at the URL
- apt_key: url=https://ftp-master.debian.org/keys/archive-key-6.0.asc state=absent
# Remove a Apt specific signing key, leading 0x is valid
- apt_key: id=0x473041FA state=absent
# Add a key from a file on the Ansible server
- apt_key: data="{{ lookup('file', 'apt.gpg') }}" state=present
# Add an Apt signing key to a specific keyring file
- apt_key: id=473041FA url=https://ftp-master.debian.org/keys/archive-key-6.0.asc keyring=/etc/apt/trusted.gpg.d/debian.gpg state=present
'''
# FIXME: standardize into module_common
from traceback import format_exc
from re import compile as re_compile
# FIXME: standardize into module_common
from distutils.spawn import find_executable
from os import environ
from sys import exc_info
import traceback
match_key = re_compile("^gpg:.*key ([0-9a-fA-F]+):.*$")
REQUIRED_EXECUTABLES=['gpg', 'grep', 'apt-key']
def check_missing_binaries(module):
missing = [e for e in REQUIRED_EXECUTABLES if not find_executable(e)]
if len(missing):
module.fail_json(msg="binaries are missing", names=missing)
def all_keys(module, keyring, short_format):
if keyring:
cmd = "apt-key --keyring %s adv --list-public-keys --keyid-format=long" % keyring
else:
cmd = "apt-key adv --list-public-keys --keyid-format=long"
(rc, out, err) = module.run_command(cmd)
results = []
lines = out.split('\n')
for line in lines:
if line.startswith("pub"):
tokens = line.split()
code = tokens[1]
(len_type, real_code) = code.split("/")
results.append(real_code)
if short_format:
results = shorten_key_ids(results)
return results
def shorten_key_ids(key_id_list):
"""
Takes a list of key ids, and converts them to the 'short' format,
by reducing them to their last 8 characters.
"""
short = []
for key in key_id_list:
short.append(key[-8:])
return short
def download_key(module, url):
# FIXME: move get_url code to common, allow for in-memory D/L, support proxies
# and reuse here
if url is None:
module.fail_json(msg="needed a URL but was not specified")
try:
rsp, info = fetch_url(module, url)
if info['status'] != 200:
module.fail_json(msg="Failed to download key at %s: %s" % (url, info['msg']))
return rsp.read()
except Exception:
module.fail_json(msg="error getting key id from url: %s" % url, traceback=format_exc())
def import_key(module, keyserver, key_id):
cmd = "apt-key adv --keyserver %s --recv %s" % (keyserver, key_id)
(rc, out, err) = module.run_command(cmd, check_rc=True)
return True
def add_key(module, keyfile, keyring, data=None):
if data is not None:
if keyring:
cmd = "apt-key --keyring %s add -" % keyring
else:
cmd = "apt-key add -"
(rc, out, err) = module.run_command(cmd, data=data, check_rc=True, binary_data=True)
else:
if keyring:
cmd = "apt-key --keyring %s add %s" % (keyring, keyfile)
else:
cmd = "apt-key add %s" % (keyfile)
(rc, out, err) = module.run_command(cmd, check_rc=True)
return True
def remove_key(module, key_id, keyring):
# FIXME: use module.run_command, fail at point of error and don't discard useful stdin/stdout
if keyring:
cmd = 'apt-key --keyring %s del %s' % (keyring, key_id)
else:
cmd = 'apt-key del %s' % key_id
(rc, out, err) = module.run_command(cmd, check_rc=True)
return True
def main():
module = AnsibleModule(
argument_spec=dict(
id=dict(required=False, default=None),
url=dict(required=False),
data=dict(required=False),
file=dict(required=False),
key=dict(required=False),
keyring=dict(required=False),
validate_certs=dict(default='yes', type='bool'),
keyserver=dict(required=False),
state=dict(required=False, choices=['present', 'absent'], default='present')
),
supports_check_mode=True
)
key_id = module.params['id']
url = module.params['url']
data = module.params['data']
filename = module.params['file']
keyring = module.params['keyring']
state = module.params['state']
keyserver = module.params['keyserver']
changed = False
if key_id:
try:
_ = int(key_id, 16)
if key_id.startswith('0x'):
key_id = key_id[2:]
key_id = key_id.upper()
except ValueError:
module.fail_json(msg="Invalid key_id", id=key_id)
# FIXME: I think we have a common facility for this, if not, want
check_missing_binaries(module)
short_format = (key_id is not None and len(key_id) == 8)
keys = all_keys(module, keyring, short_format)
return_values = {}
if state == 'present':
if key_id and key_id in keys:
module.exit_json(changed=False)
else:
if not filename and not data and not keyserver:
data = download_key(module, url)
if key_id and key_id in keys:
module.exit_json(changed=False)
else:
if module.check_mode:
module.exit_json(changed=True)
if filename:
add_key(module, filename, keyring)
elif keyserver:
import_key(module, keyserver, key_id)
else:
add_key(module, "-", keyring, data)
changed=False
keys2 = all_keys(module, keyring, short_format)
if len(keys) != len(keys2):
changed=True
if key_id and not key_id in keys2:
module.fail_json(msg="key does not seem to have been added", id=key_id)
module.exit_json(changed=changed)
elif state == 'absent':
if not key_id:
module.fail_json(msg="key is required")
if key_id in keys:
if module.check_mode:
module.exit_json(changed=True)
if remove_key(module, key_id, keyring):
changed=True
else:
# FIXME: module.fail_json or exit-json immediately at point of failure
module.fail_json(msg="error removing key_id", **return_values)
module.exit_json(changed=changed, **return_values)
# import module snippets
from ansible.module_utils.basic import *
from ansible.module_utils.urls import *
main()
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