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# -*- coding: utf-8 -*- # Ansible module to import third party repo keys to your rpm db # Copyright: (c) 2013, Héctor Acosta <hector.acosta@gazzang.com> # 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 DOCUMENTATION = ''' --- module: rpm_key author: - Hector Acosta (@hacosta) <hector.acosta@gazzang.com> short_description: Adds or removes a gpg key from the rpm db description: - Adds or removes (rpm --import) a gpg key to your rpm database. version_added: "1.3" options: key: description: - Key that will be modified. Can be a url, a file on the managed node, or a keyid if the key already exists in the database. type: str required: true state: description: - If the key will be imported or removed from the rpm db. type: str default: present choices: [ absent, present ] validate_certs: description: - If C(false) and the C(key) is a url starting with https, SSL certificates will not be validated. - This should only be used on personally controlled sites using self-signed certificates. type: bool default: 'yes' fingerprint: description: - The long-form fingerprint of the key being imported. - This will be used to verify the specified key. type: str version_added: 2.9 extends_documentation_fragment: - action_common_attributes attributes: check_mode: support: full diff_mode: support: none platform: platforms: rhel ''' EXAMPLES = ''' - name: Import a key from a url ansible.builtin.rpm_key: state: present key: http://apt.sw.be/RPM-GPG-KEY.dag.txt - name: Import a key from a file ansible.builtin.rpm_key: state: present key: /path/to/key.gpg - name: Ensure a key is not present in the db ansible.builtin.rpm_key: state: absent key: DEADB33F - name: Verify the key, using a fingerprint, before import ansible.builtin.rpm_key: key: /path/to/RPM-GPG-KEY.dag.txt fingerprint: EBC6 E12C 62B1 C734 026B 2122 A20E 5214 6B8D 79E6 ''' RETURN = r'''#''' import re import os.path import tempfile # import module snippets from ansible.module_utils.basic import AnsibleModule from ansible.module_utils.urls import fetch_url from ansible.module_utils._text import to_native def is_pubkey(string): """Verifies if string is a pubkey""" pgp_regex = ".*?(-----BEGIN PGP PUBLIC KEY BLOCK-----.*?-----END PGP PUBLIC KEY BLOCK-----).*" return bool(re.match(pgp_regex, to_native(string, errors='surrogate_or_strict'), re.DOTALL)) class RpmKey(object): def __init__(self, module): # If the key is a url, we need to check if it's present to be idempotent, # to do that, we need to check the keyid, which we can get from the armor. keyfile = None should_cleanup_keyfile = False self.module = module self.rpm = self.module.get_bin_path('rpm', True) state = module.params['state'] key = module.params['key'] fingerprint = module.params['fingerprint'] if fingerprint: fingerprint = fingerprint.replace(' ', '').upper() self.gpg = self.module.get_bin_path('gpg') if not self.gpg: self.gpg = self.module.get_bin_path('gpg2', required=True) if '://' in key: keyfile = self.fetch_key(key) keyid = self.getkeyid(keyfile) should_cleanup_keyfile = True elif self.is_keyid(key): keyid = key elif os.path.isfile(key): keyfile = key keyid = self.getkeyid(keyfile) else: self.module.fail_json(msg="Not a valid key %s" % key) keyid = self.normalize_keyid(keyid) if state == 'present': if self.is_key_imported(keyid): module.exit_json(changed=False) else: if not keyfile: self.module.fail_json(msg="When importing a key, a valid file must be given") if fingerprint: has_fingerprint = self.getfingerprint(keyfile) if fingerprint != has_fingerprint: self.module.fail_json( msg="The specified fingerprint, '%s', does not match the key fingerprint '%s'" % (fingerprint, has_fingerprint) ) self.import_key(keyfile) if should_cleanup_keyfile: self.module.cleanup(keyfile) module.exit_json(changed=True) else: if self.is_key_imported(keyid): self.drop_key(keyid) module.exit_json(changed=True) else: module.exit_json(changed=False) def fetch_key(self, url): """Downloads a key from url, returns a valid path to a gpg key""" rsp, info = fetch_url(self.module, url) if info['status'] != 200: self.module.fail_json(msg="failed to fetch key at %s , error was: %s" % (url, info['msg'])) key = rsp.read() if not is_pubkey(key): self.module.fail_json(msg="Not a public key: %s" % url) tmpfd, tmpname = tempfile.mkstemp() self.module.add_cleanup_file(tmpname) tmpfile = os.fdopen(tmpfd, "w+b") tmpfile.write(key) tmpfile.close() return tmpname def normalize_keyid(self, keyid): """Ensure a keyid doesn't have a leading 0x, has leading or trailing whitespace, and make sure is uppercase""" ret = keyid.strip().upper() if ret.startswith('0x'): return ret[2:] elif ret.startswith('0X'): return ret[2:] else: return ret def getkeyid(self, keyfile): stdout, stderr = self.execute_command([self.gpg, '--no-tty', '--batch', '--with-colons', '--fixed-list-mode', keyfile]) for line in stdout.splitlines(): line = line.strip() if line.startswith('pub:'): return line.split(':')[4] self.module.fail_json(msg="Unexpected gpg output") def getfingerprint(self, keyfile): stdout, stderr = self.execute_command([ self.gpg, '--no-tty', '--batch', '--with-colons', '--fixed-list-mode', '--with-fingerprint', keyfile ]) for line in stdout.splitlines(): line = line.strip() if line.startswith('fpr:'): # As mentioned here, # # https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=blob_plain;f=doc/DETAILS # # The description of the `fpr` field says # # "fpr :: Fingerprint (fingerprint is in field 10)" # return line.split(':')[9] self.module.fail_json(msg="Unexpected gpg output") def is_keyid(self, keystr): """Verifies if a key, as provided by the user is a keyid""" return re.match('(0x)?[0-9a-f]{8}', keystr, flags=re.IGNORECASE) def execute_command(self, cmd): rc, stdout, stderr = self.module.run_command(cmd, use_unsafe_shell=True) if rc != 0: self.module.fail_json(msg=stderr) return stdout, stderr def is_key_imported(self, keyid): cmd = self.rpm + ' -q gpg-pubkey' rc, stdout, stderr = self.module.run_command(cmd) if rc != 0: # No key is installed on system return False cmd += ' --qf "%{description}" | ' + self.gpg + ' --no-tty --batch --with-colons --fixed-list-mode -' stdout, stderr = self.execute_command(cmd) for line in stdout.splitlines(): if keyid in line.split(':')[4]: return True return False def import_key(self, keyfile): if not self.module.check_mode: self.execute_command([self.rpm, '--import', keyfile]) def drop_key(self, keyid): if not self.module.check_mode: self.execute_command([self.rpm, '--erase', '--allmatches', "gpg-pubkey-%s" % keyid[-8:].lower()]) def main(): module = AnsibleModule( argument_spec=dict( state=dict(type='str', default='present', choices=['absent', 'present']), key=dict(type='str', required=True, no_log=False), fingerprint=dict(type='str'), validate_certs=dict(type='bool', default=True), ), supports_check_mode=True, ) RpmKey(module) if __name__ == '__main__': main()