Michael DeHaan
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library/packaging/rpm_key
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library/packaging/rpm_key
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#!/usr/bin/python2
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# -*- coding: utf-8 -*-
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"""
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Ansible module to import third party repo keys to your rpm db
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(c) 2013, Héctor Acosta <hector.acosta@gazzang.com>
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This file is part of Ansible
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Ansible 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 3 of the License, or
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(at your option) any later version.
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Ansible 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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You should have received a copy of the GNU General Public License
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along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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"""
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DOCUMENTATION = '''
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---
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module: rpm_key
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author: Hector Acosta <hector.acosta@gazzang.com>
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short_description: Adds or removes a gpg key from the rpm db
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description:
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- Adds or removes (rpm --import) a gpg key to your rpm database.
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version_added: "1.3"
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options:
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key:
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required: true
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default: null
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aliases: []
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description:
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- Key that will be modified. Can be a url, a file, or a keyid if the key already exists in the database.
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state:
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required: false
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default: "present"
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choices: [present, absent]
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description:
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- Wheather the key will be imported or removed from the rpm db.
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'''
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EXAMPLES = '''
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# Example action to import a key from a url
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- rpm_key state=present key=http://apt.sw.be/RPM-GPG-KEY.dag.txt
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# Example action to import a key from a file
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- rpm_key state=present key=/path/to/key.gpg
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# Example action to ensure a key is not present in the db
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- rpm_key state=absent key=DEADB33F
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'''
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import syslog
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import os.path
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import re
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import urllib2
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import tempfile
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# Attempt to download at most 8192 bytes.
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# Should be more than enough for all keys
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MAXBYTES = 8192
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def is_pubkey(string):
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"""Verifies if string is a pubkey"""
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pgp_regex = ".*?(-----BEGIN PGP PUBLIC KEY BLOCK-----.*?-----END PGP PUBLIC KEY BLOCK-----).*"
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return re.match(pgp_regex, string, re.DOTALL)
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class RpmKey:
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def __init__(self, module):
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self.syslogging = False
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# If the key is a url, we need to check if it's present to be idempotent,
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# to do that, we need to check the keyid, which we can get from the armor.
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keyfile = None
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should_cleanup_keyfile = False
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self.module = module
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self.rpm = self.module.get_bin_path('rpm', True)
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state = module.params['state']
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key = module.params['key']
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if '://' in key:
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keyfile = self.fetch_key(key)
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keyid = self.getkeyid(keyfile)
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should_cleanup_keyfile = True
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elif is_keyid(key):
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keyid = key
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elif os.path.isfile(key):
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keyfile = key
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keyid = self.getkeyid(keyfile)
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else:
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self.module.fail_json(msg="Not a valid key %s" % key)
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keyid = self.normalize_keyid(keyid)
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if state == 'present':
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if self.is_key_imported(keyid):
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module.exit_json(changed=False)
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else:
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if not keyfile:
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self.module.fail_json(msg="When importing a key, a valid file must be given")
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self.import_key(keyfile, dryrun=module.check_mode)
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if should_cleanup_keyfile:
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self.module.cleanup(keyfile)
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module.exit_json(changed=True)
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else:
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if self.is_key_imported(keyid):
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self.drop_key(keyid, dryrun=module.check_mode)
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module.exit_json(changed=True)
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else:
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module.exit_json(changed=False)
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def fetch_key(self, url, maxbytes=MAXBYTES):
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"""Downloads a key from url, returns a valid path to a gpg key"""
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try:
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fd = urllib2.urlopen(url)
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key = fd.read(maxbytes)
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if not is_pubkey(key):
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self.module.fail_json(msg="Not a public key: %s" % url)
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tmpfd, tmpname = tempfile.mkstemp()
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tmpfile = os.fdopen(tmpfd, "w+b")
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tmpfile.write(key)
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tmpfile.close()
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return tmpname
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except urllib2.URLError, e:
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self.module.fail_json(msg=str(e))
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def normalize_keyid(self, keyid):
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"""Ensure a keyid doesn't have a leading 0x, has leading or trailing whitespace, and make sure is lowercase"""
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ret = keyid.strip().lower()
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if ret.startswith(('0x', '0X')):
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return ret[2:]
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else:
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return ret
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def getkeyid(self, keyfile):
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gpg = self.module.get_bin_path('gpg', True)
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stdout, stderr = self.execute_command([gpg, '--no-tty', '--batch', '--with-colons', '--fixed-list-mode', '--list-packets', keyfile])
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for line in stdout.splitlines():
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line = line.strip()
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if line.startswith('keyid:'):
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# We want just the last 8 characters of the keyid
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keyid = line.split(':')[1].strip()[8:]
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return keyid
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self.json_fail(msg="Unexpected gpg output")
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def is_keyid(keystr):
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"""Verifies if a key, as provided by the user is a keyid"""
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return re.match('(0x)?(0-9a-f){8}', keystr, flags=re.IGNORECASE)
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def execute_command(self, cmd):
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if self.syslogging:
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syslog.openlog('ansible-%s' % os.path.basename(__file__))
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syslog.syslog(syslog.LOG_NOTICE, 'Command %s' % '|'.join(cmd))
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rc, stdout, stderr = self.module.run_command(cmd)
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if rc != 0:
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self.module.fail_json(msg=stderr)
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return stdout, stderr
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def is_key_imported(self, keyid):
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stdout, stderr = self.execute_command([self.rpm, '-q', 'gpg-pubkey'])
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for line in stdout.splitlines():
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line = line.strip()
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if not line:
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continue
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match = re.match('gpg-pubkey-([0-9a-f]+)-([0-9a-f]+)', line)
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if not match:
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self.module.fail_json(msg="rpm returned unexpected output [%s]" % line)
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else:
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if keyid == match.group(1):
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return True
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return False
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def import_key(self, keyfile, dryrun=False):
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if not dryrun:
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self.execute_command([self.rpm, '--import', keyfile])
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def drop_key(self, key, dryrun=False):
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if not dryrun:
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self.execute_command([self.rpm, '--erase', '--allmatches', "gpg-pubkey-%s" % key])
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def main():
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module = AnsibleModule(
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argument_spec = dict(
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state=dict(default='present', choices=['present', 'absent'], type='str'),
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key=dict(required=True, type='str')
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),
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supports_check_mode=True
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)
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RpmKey(module)
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# include magic from lib/ansible/module_common.py
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#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
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main()
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