#!/usr/bin/python
# -*- coding: utf-8 -*-
# Copyright: (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>
# Copyright: (c) 2012, Jayson Vantuyl <jayson@aggressive.ly>
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
from __future__ import absolute_import, division, print_function
__metaclass__ = type
ANSIBLE_METADATA = {'metadata_version': '1.1',
'status': ['preview'],
'supported_by': 'core'}
DOCUMENTATION = '''
---
module: apt_key
author:
- Jayson Vantuyl (@jvantuyl)
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:
description:
- The identifier of the key.
- Including this allows check mode to correctly report the changed state.
- If specifying a subkey's id be aware that apt-key does not understand how to remove keys via a subkey id. Specify the primary key's id instead.
- This parameter is required when C(state) is set to C(absent).
data:
description:
- The keyfile contents to add to the keyring.
file:
description:
- The path to a keyfile on the remote server to add to the keyring.
keyring:
description:
- The full path to specific keyring file in /etc/apt/trusted.gpg.d/
version_added: "1.3"
url:
description:
- The URL to retrieve key from.
keyserver:
description:
- The keyserver to retrieve key from.
version_added: "1.6"
state:
description:
- Ensures that the key is present (added) or absent (revoked).
choices: [ absent, present ]
default: present
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.
type: bool
default: 'yes'
'''
EXAMPLES = '''
- name: Add an apt key by id from a keyserver
apt_key:
keyserver: keyserver.ubuntu.com
id: 36A1D7869245C8950F966E92D8576A8BA88D21E9
- name: 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
- name: 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
- name: Remove a Apt specific signing key, leading 0x is valid
apt_key:
id: 0x473041FA
state: absent
# Use armored file since utf-8 string is expected. Must be of "PGP PUBLIC KEY BLOCK" type.
- name: Add a key from a file on the Ansible server.
apt_key:
data: "{{ lookup('file', 'apt.asc') }}"
state: present
- name: 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
- name: Add Apt signing key on remote server to keyring
apt_key:
id: 473041FA
file: /tmp/apt.gpg
state: present
'''
# FIXME: standardize into module_common
from traceback import format_exc
from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils._text import to_native
from ansible.module_utils.urls import fetch_url
apt_key_bin = None
def find_needed_binaries(module):
global apt_key_bin
apt_key_bin = module.get_bin_path('apt-key', required=True)
# FIXME: Is there a reason that gpg and grep are checked? Is it just
# cruft or does the apt .deb package not require them (and if they're not
# installed, /usr/bin/apt-key fails?)
module.get_bin_path('gpg', required=True)
module.get_bin_path('grep', required=True)
def parse_key_id(key_id):
"""validate the key_id and break it into segments
:arg key_id: The key_id as supplied by the user. A valid key_id will be
8, 16, or more hexadecimal chars with an optional leading ``0x``.
:returns: The portion of key_id suitable for apt-key del, the portion
suitable for comparisons with --list-public-keys, and the portion that
can be used with --recv-key. If key_id is long enough, these will be
the last 8 characters of key_id, the last 16 characters, and all of
key_id. If key_id is not long enough, some of the values will be the
same.
* apt-key del <= 1.10 has a bug with key_id != 8 chars
* apt-key adv --list-public-keys prints 16 chars
* apt-key adv --recv-key can take more chars
"""
# Make sure the key_id is valid hexadecimal
int(key_id, 16)
key_id = key_id.upper()
if key_id.startswith('0X'):
key_id = key_id[2:]
key_id_len = len(key_id)
if (key_id_len != 8 and key_id_len != 16) and key_id_len <= 16:
raise ValueError('key_id must be 8, 16, or 16+ hexadecimal characters in length')
short_key_id = key_id[-8:]
fingerprint = key_id
if key_id_len > 16:
fingerprint = key_id[-16:]
return short_key_id, fingerprint, key_id
def all_keys(module, keyring, short_format):
if keyring:
cmd = "%s --keyring %s adv --list-public-keys --keyid-format=long" % (apt_key_bin, keyring)
else:
cmd = "%s adv --list-public-keys --keyid-format=long" % apt_key_bin
(rc, out, err) = module.run_command(cmd)
results = []
lines = to_native(out).split('\n')
for line in lines:
if (line.startswith("pub") or line.startswith("sub")) and "expired" not in line:
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, keyring, keyserver, key_id):
if keyring:
cmd = "%s --keyring %s adv --no-tty --keyserver %s --recv %s" % (apt_key_bin, keyring, keyserver, key_id)
else:
cmd = "%s adv --no-tty --keyserver %s --recv %s" % (apt_key_bin, keyserver, key_id)
for retry in range(5):
lang_env = dict(LANG='C', LC_ALL='C', LC_MESSAGES='C')
(rc, out, err) = module.run_command(cmd, environ_update=lang_env)
if rc == 0:
break
else:
# Out of retries
if rc == 2 and 'not found on keyserver' in out:
msg = 'Key %s not found on keyserver %s' % (key_id, keyserver)
module.fail_json(cmd=cmd, msg=msg)
else:
msg = "Error fetching key %s from keyserver: %s" % (key_id, keyserver)
module.fail_json(cmd=cmd, msg=msg, rc=rc, stdout=out, stderr=err)
return True
def add_key(module, keyfile, keyring, data=None):
if data is not None:
if keyring:
cmd = "%s --keyring %s add -" % (apt_key_bin, keyring)
else:
cmd = "%s add -" % apt_key_bin
(rc, out, err) = module.run_command(cmd, data=data, check_rc=True, binary_data=True)
else:
if keyring:
cmd = "%s --keyring %s add %s" % (apt_key_bin, keyring, keyfile)
else:
cmd = "%s add %s" % (apt_key_bin, 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 = '%s --keyring %s del %s' % (apt_key_bin, keyring, key_id)
else:
cmd = '%s del %s' % (apt_key_bin, key_id)
(rc, out, err) = module.run_command(cmd, check_rc=True)
return True
def main():
module = AnsibleModule(
argument_spec=dict(
id=dict(type='str'),
url=dict(type='str'),
data=dict(type='str'),
file=dict(type='path'),
key=dict(type='str'),
keyring=dict(type='path'),
validate_certs=dict(type='bool', default=True),
keyserver=dict(type='str'),
state=dict(type='str', default='present', choices=['absent', 'present']),
),
supports_check_mode=True,
mutually_exclusive=(('data', 'filename', 'keyserver', 'url'),),
)
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
fingerprint = short_key_id = key_id
short_format = False
if key_id:
try:
short_key_id, fingerprint, key_id = parse_key_id(key_id)
except ValueError:
module.fail_json(msg='Invalid key_id', id=key_id)
if len(fingerprint) == 8:
short_format = True
find_needed_binaries(module)
keys = all_keys(module, keyring, short_format)
return_values = {}
if state == 'present':
if fingerprint and fingerprint in keys:
module.exit_json(changed=False)
elif fingerprint and fingerprint not in keys and module.check_mode:
# TODO: Someday we could go further -- write keys out to
# a temporary file and then extract the key id from there via gpg
# to decide if the key is installed or not.
module.exit_json(changed=True)
else:
if not filename and not data and not keyserver:
data = download_key(module, url)
if filename:
add_key(module, filename, keyring)
elif keyserver:
import_key(module, keyring, 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 fingerprint and fingerprint not 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 fingerprint in keys:
if module.check_mode:
module.exit_json(changed=True)
# we use the "short" id: key_id[-8:], short_format=True
# it's a workaround for https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1481871
if remove_key(module, short_key_id, keyring):
keys = all_keys(module, keyring, short_format)
if fingerprint in keys:
module.fail_json(msg="apt-key del did not return an error but the key was not removed (check that the id is correct and *not* a subkey)",
id=key_id)
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)
if __name__ == '__main__':
main()