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|
#!/usr/bin/python
# -*- coding: utf-8 -*-
# Copyright: (c) 2019, Felix Fontein <felix@fontein.de>
# 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': 'community'}
DOCUMENTATION = r'''
---
module: x509_crl
version_added: "2.10"
short_description: Generate Certificate Revocation Lists (CRLs)
description:
- This module allows one to (re)generate or update Certificate Revocation Lists (CRLs).
- Certificates on the revocation list can be either specified via serial number and (optionally) their issuer,
or as a path to a certificate file in PEM format.
requirements:
- cryptography >= 1.2
author:
- Felix Fontein (@felixfontein)
options:
state:
description:
- Whether the CRL file should exist or not, taking action if the state is different from what is stated.
type: str
default: present
choices: [ absent, present ]
mode:
description:
- Defines how to process entries of existing CRLs.
- If set to C(generate), makes sure that the CRL has the exact set of revoked certificates
as specified in I(revoked_certificates).
- If set to C(update), makes sure that the CRL contains the revoked certificates from
I(revoked_certificates), but can also contain other revoked certificates. If the CRL file
already exists, all entries from the existing CRL will also be included in the new CRL.
When using C(update), you might be interested in setting I(ignore_timestamps) to C(yes).
type: str
default: generate
choices: [ generate, update ]
force:
description:
- Should the CRL be forced to be regenerated.
type: bool
default: no
backup:
description:
- Create a backup file including a timestamp so you can get the original
CRL back if you overwrote it with a new one by accident.
type: bool
default: no
path:
description:
- Remote absolute path where the generated CRL file should be created or is already located.
type: path
required: yes
privatekey_path:
description:
- Path to the CA's private key to use when signing the CRL.
- Either I(privatekey_path) or I(privatekey_content) must be specified if I(state) is C(present), but not both.
type: path
privatekey_content:
description:
- The content of the CA's private key to use when signing the CRL.
- Either I(privatekey_path) or I(privatekey_content) must be specified if I(state) is C(present), but not both.
type: str
privatekey_passphrase:
description:
- The passphrase for the I(privatekey_path).
- This is required if the private key is password protected.
type: str
issuer:
description:
- Key/value pairs that will be present in the issuer name field of the CRL.
- If you need to specify more than one value with the same key, use a list as value.
- Required if I(state) is C(present).
type: dict
last_update:
description:
- The point in time from which this CRL can be trusted.
- Time can be specified either as relative time or as absolute timestamp.
- Time will always be interpreted as UTC.
- Valid format is C([+-]timespec | ASN.1 TIME) where timespec can be an integer
+ C([w | d | h | m | s]) (e.g. C(+32w1d2h).
- Note that if using relative time this module is NOT idempotent, except when
I(ignore_timestamps) is set to C(yes).
type: str
default: "+0s"
next_update:
description:
- "The absolute latest point in time by which this I(issuer) is expected to have issued
another CRL. Many clients will treat a CRL as expired once I(next_update) occurs."
- Time can be specified either as relative time or as absolute timestamp.
- Time will always be interpreted as UTC.
- Valid format is C([+-]timespec | ASN.1 TIME) where timespec can be an integer
+ C([w | d | h | m | s]) (e.g. C(+32w1d2h).
- Note that if using relative time this module is NOT idempotent, except when
I(ignore_timestamps) is set to C(yes).
- Required if I(state) is C(present).
type: str
digest:
description:
- Digest algorithm to be used when signing the CRL.
type: str
default: sha256
revoked_certificates:
description:
- List of certificates to be revoked.
- Required if I(state) is C(present).
type: list
elements: dict
suboptions:
path:
description:
- Path to a certificate in PEM format.
- The serial number and issuer will be extracted from the certificate.
- Mutually exclusive with I(content) and I(serial_number). One of these three options
must be specified.
type: path
content:
description:
- Content of a certificate in PEM format.
- The serial number and issuer will be extracted from the certificate.
- Mutually exclusive with I(path) and I(serial_number). One of these three options
must be specified.
type: str
serial_number:
description:
- Serial number of the certificate.
- Mutually exclusive with I(path) and I(content). One of these three options must
be specified.
type: int
revocation_date:
description:
- The point in time the certificate was revoked.
- Time can be specified either as relative time or as absolute timestamp.
- Time will always be interpreted as UTC.
- Valid format is C([+-]timespec | ASN.1 TIME) where timespec can be an integer
+ C([w | d | h | m | s]) (e.g. C(+32w1d2h).
- Note that if using relative time this module is NOT idempotent, except when
I(ignore_timestamps) is set to C(yes).
type: str
default: "+0s"
issuer:
description:
- The certificate's issuer.
- "Example: C(DNS:ca.example.org)"
type: list
elements: str
issuer_critical:
description:
- Whether the certificate issuer extension should be critical.
type: bool
default: no
reason:
description:
- The value for the revocation reason extension.
type: str
choices:
- unspecified
- key_compromise
- ca_compromise
- affiliation_changed
- superseded
- cessation_of_operation
- certificate_hold
- privilege_withdrawn
- aa_compromise
- remove_from_crl
reason_critical:
description:
- Whether the revocation reason extension should be critical.
type: bool
default: no
invalidity_date:
description:
- The point in time it was known/suspected that the private key was compromised
or that the certificate otherwise became invalid.
- Time can be specified either as relative time or as absolute timestamp.
- Time will always be interpreted as UTC.
- Valid format is C([+-]timespec | ASN.1 TIME) where timespec can be an integer
+ C([w | d | h | m | s]) (e.g. C(+32w1d2h).
- Note that if using relative time this module is NOT idempotent. This will NOT
change when I(ignore_timestamps) is set to C(yes).
type: str
invalidity_date_critical:
description:
- Whether the invalidity date extension should be critical.
type: bool
default: no
ignore_timestamps:
description:
- Whether the timestamps I(last_update), I(next_update) and I(revocation_date) (in
I(revoked_certificates)) should be ignored for idempotency checks. The timestamp
I(invalidity_date) in I(revoked_certificates) will never be ignored.
- Use this in combination with relative timestamps for these values to get idempotency.
type: bool
default: no
return_content:
description:
- If set to C(yes), will return the (current or generated) CRL's content as I(crl).
type: bool
default: no
extends_documentation_fragment:
- files
notes:
- All ASN.1 TIME values should be specified following the YYYYMMDDHHMMSSZ pattern.
- Date specified should be UTC. Minutes and seconds are mandatory.
'''
EXAMPLES = r'''
- name: Generate a CRL
x509_crl:
path: /etc/ssl/my-ca.crl
privatekey_path: /etc/ssl/private/my-ca.pem
issuer:
CN: My CA
last_update: "+0s"
next_update: "+7d"
revoked_certificates:
- serial_number: 1234
revocation_date: 20190331202428Z
issuer:
CN: My CA
- serial_number: 2345
revocation_date: 20191013152910Z
reason: affiliation_changed
invalidity_date: 20191001000000Z
- path: /etc/ssl/crt/revoked-cert.pem
revocation_date: 20191010010203Z
'''
RETURN = r'''
filename:
description: Path to the generated CRL
returned: changed or success
type: str
sample: /path/to/my-ca.crl
backup_file:
description: Name of backup file created.
returned: changed and if I(backup) is C(yes)
type: str
sample: /path/to/my-ca.crl.2019-03-09@11:22~
privatekey:
description: Path to the private CA key
returned: changed or success
type: str
sample: /path/to/my-ca.pem
issuer:
description:
- The CRL's issuer.
- Note that for repeated values, only the last one will be returned.
returned: success
type: dict
sample: '{"organizationName": "Ansible", "commonName": "ca.example.com"}'
issuer_ordered:
description: The CRL's issuer as an ordered list of tuples.
returned: success
type: list
elements: list
sample: '[["organizationName", "Ansible"], ["commonName": "ca.example.com"]]'
last_update:
description: The point in time from which this CRL can be trusted as ASN.1 TIME.
returned: success
type: str
sample: 20190413202428Z
next_update:
description: The point in time from which a new CRL will be issued and the client has to check for it as ASN.1 TIME.
returned: success
type: str
sample: 20190413202428Z
digest:
description: The signature algorithm used to sign the CRL.
returned: success
type: str
sample: sha256WithRSAEncryption
revoked_certificates:
description: List of certificates to be revoked.
returned: success
type: list
elements: dict
contains:
serial_number:
description: Serial number of the certificate.
type: int
sample: 1234
revocation_date:
description: The point in time the certificate was revoked as ASN.1 TIME.
type: str
sample: 20190413202428Z
issuer:
description: The certificate's issuer.
type: list
elements: str
sample: '["DNS:ca.example.org"]'
issuer_critical:
description: Whether the certificate issuer extension is critical.
type: bool
sample: no
reason:
description:
- The value for the revocation reason extension.
- One of C(unspecified), C(key_compromise), C(ca_compromise), C(affiliation_changed), C(superseded),
C(cessation_of_operation), C(certificate_hold), C(privilege_withdrawn), C(aa_compromise), and
C(remove_from_crl).
type: str
sample: key_compromise
reason_critical:
description: Whether the revocation reason extension is critical.
type: bool
sample: no
invalidity_date:
description: |
The point in time it was known/suspected that the private key was compromised
or that the certificate otherwise became invalid as ASN.1 TIME.
type: str
sample: 20190413202428Z
invalidity_date_critical:
description: Whether the invalidity date extension is critical.
type: bool
sample: no
crl:
description: The (current or generated) CRL's content.
returned: if I(state) is C(present) and I(return_content) is C(yes)
type: str
'''
import os
import traceback
from ansible.module_utils.compat.version import LooseVersion
from ansible.module_utils import crypto as crypto_utils
from ansible.module_utils._text import to_native, to_text
from ansible.module_utils.basic import AnsibleModule, missing_required_lib
MINIMAL_CRYPTOGRAPHY_VERSION = '1.2'
CRYPTOGRAPHY_IMP_ERR = None
try:
import cryptography
from cryptography import x509
from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives.serialization import Encoding
from cryptography.x509 import (
CertificateRevocationListBuilder,
RevokedCertificateBuilder,
NameAttribute,
Name,
)
CRYPTOGRAPHY_VERSION = LooseVersion(cryptography.__version__)
except ImportError:
CRYPTOGRAPHY_IMP_ERR = traceback.format_exc()
CRYPTOGRAPHY_FOUND = False
else:
CRYPTOGRAPHY_FOUND = True
TIMESTAMP_FORMAT = "%Y%m%d%H%M%SZ"
class CRLError(crypto_utils.OpenSSLObjectError):
pass
class CRL(crypto_utils.OpenSSLObject):
def __init__(self, module):
super(CRL, self).__init__(
module.params['path'],
module.params['state'],
module.params['force'],
module.check_mode
)
self.update = module.params['mode'] == 'update'
self.ignore_timestamps = module.params['ignore_timestamps']
self.return_content = module.params['return_content']
self.crl_content = None
self.privatekey_path = module.params['privatekey_path']
self.privatekey_content = module.params['privatekey_content']
if self.privatekey_content is not None:
self.privatekey_content = self.privatekey_content.encode('utf-8')
self.privatekey_passphrase = module.params['privatekey_passphrase']
self.issuer = crypto_utils.parse_name_field(module.params['issuer'])
self.issuer = [(entry[0], entry[1]) for entry in self.issuer if entry[1]]
self.last_update = crypto_utils.get_relative_time_option(module.params['last_update'], 'last_update')
self.next_update = crypto_utils.get_relative_time_option(module.params['next_update'], 'next_update')
self.digest = crypto_utils.select_message_digest(module.params['digest'])
if self.digest is None:
raise CRLError('The digest "{0}" is not supported'.format(module.params['digest']))
self.revoked_certificates = []
for i, rc in enumerate(module.params['revoked_certificates']):
result = {
'serial_number': None,
'revocation_date': None,
'issuer': None,
'issuer_critical': False,
'reason': None,
'reason_critical': False,
'invalidity_date': None,
'invalidity_date_critical': False,
}
path_prefix = 'revoked_certificates[{0}].'.format(i)
if rc['path'] is not None or rc['content'] is not None:
# Load certificate from file or content
try:
if rc['content'] is not None:
rc['content'] = rc['content'].encode('utf-8')
cert = crypto_utils.load_certificate(rc['path'], content=rc['content'], backend='cryptography')
try:
result['serial_number'] = cert.serial_number
except AttributeError:
# The property was called "serial" before cryptography 1.4
result['serial_number'] = cert.serial
except crypto_utils.OpenSSLObjectError as e:
if rc['content'] is not None:
module.fail_json(
msg='Cannot parse certificate from {0}content: {1}'.format(path_prefix, to_native(e))
)
else:
module.fail_json(
msg='Cannot read certificate "{1}" from {0}path: {2}'.format(path_prefix, rc['path'], to_native(e))
)
else:
# Specify serial_number (and potentially issuer) directly
result['serial_number'] = rc['serial_number']
# All other options
if rc['issuer']:
result['issuer'] = [crypto_utils.cryptography_get_name(issuer) for issuer in rc['issuer']]
result['issuer_critical'] = rc['issuer_critical']
result['revocation_date'] = crypto_utils.get_relative_time_option(
rc['revocation_date'],
path_prefix + 'revocation_date'
)
if rc['reason']:
result['reason'] = crypto_utils.REVOCATION_REASON_MAP[rc['reason']]
result['reason_critical'] = rc['reason_critical']
if rc['invalidity_date']:
result['invalidity_date'] = crypto_utils.get_relative_time_option(
rc['invalidity_date'],
path_prefix + 'invalidity_date'
)
result['invalidity_date_critical'] = rc['invalidity_date_critical']
self.revoked_certificates.append(result)
self.module = module
self.backup = module.params['backup']
self.backup_file = None
try:
self.privatekey = crypto_utils.load_privatekey(
path=self.privatekey_path,
content=self.privatekey_content,
passphrase=self.privatekey_passphrase,
backend='cryptography'
)
except crypto_utils.OpenSSLBadPassphraseError as exc:
raise CRLError(exc)
self.crl = None
try:
with open(self.path, 'rb') as f:
data = f.read()
self.crl = x509.load_pem_x509_crl(data, default_backend())
if self.return_content:
self.crl_content = data
except Exception as dummy:
self.crl_content = None
def remove(self):
if self.backup:
self.backup_file = self.module.backup_local(self.path)
super(CRL, self).remove(self.module)
def _compress_entry(self, entry):
if self.ignore_timestamps:
# Throw out revocation_date
return (
entry['serial_number'],
tuple(entry['issuer']) if entry['issuer'] is not None else None,
entry['issuer_critical'],
entry['reason'],
entry['reason_critical'],
entry['invalidity_date'],
entry['invalidity_date_critical'],
)
else:
return (
entry['serial_number'],
entry['revocation_date'],
tuple(entry['issuer']) if entry['issuer'] is not None else None,
entry['issuer_critical'],
entry['reason'],
entry['reason_critical'],
entry['invalidity_date'],
entry['invalidity_date_critical'],
)
def check(self, perms_required=True):
"""Ensure the resource is in its desired state."""
state_and_perms = super(CRL, self).check(self.module, perms_required)
if not state_and_perms:
return False
if self.crl is None:
return False
if self.last_update != self.crl.last_update and not self.ignore_timestamps:
return False
if self.next_update != self.crl.next_update and not self.ignore_timestamps:
return False
if self.digest.name != self.crl.signature_hash_algorithm.name:
return False
want_issuer = [(crypto_utils.cryptography_name_to_oid(entry[0]), entry[1]) for entry in self.issuer]
if want_issuer != [(sub.oid, sub.value) for sub in self.crl.issuer]:
return False
old_entries = [self._compress_entry(crypto_utils.cryptography_decode_revoked_certificate(cert)) for cert in self.crl]
new_entries = [self._compress_entry(cert) for cert in self.revoked_certificates]
if self.update:
# We don't simply use a set so that duplicate entries are treated correctly
for entry in new_entries:
try:
old_entries.remove(entry)
except ValueError:
return False
else:
if old_entries != new_entries:
return False
return True
def _generate_crl(self):
backend = default_backend()
crl = CertificateRevocationListBuilder()
try:
crl = crl.issuer_name(Name([
NameAttribute(crypto_utils.cryptography_name_to_oid(entry[0]), to_text(entry[1]))
for entry in self.issuer
]))
except ValueError as e:
raise CRLError(e)
crl = crl.last_update(self.last_update)
crl = crl.next_update(self.next_update)
if self.update and self.crl:
new_entries = set([self._compress_entry(entry) for entry in self.revoked_certificates])
for entry in self.crl:
decoded_entry = self._compress_entry(crypto_utils.cryptography_decode_revoked_certificate(entry))
if decoded_entry not in new_entries:
crl = crl.add_revoked_certificate(entry)
for entry in self.revoked_certificates:
revoked_cert = RevokedCertificateBuilder()
revoked_cert = revoked_cert.serial_number(entry['serial_number'])
revoked_cert = revoked_cert.revocation_date(entry['revocation_date'])
if entry['issuer'] is not None:
revoked_cert = revoked_cert.add_extension(
x509.CertificateIssuer([
crypto_utils.cryptography_get_name(name) for name in self.entry['issuer']
]),
entry['issuer_critical']
)
if entry['reason'] is not None:
revoked_cert = revoked_cert.add_extension(
x509.CRLReason(entry['reason']),
entry['reason_critical']
)
if entry['invalidity_date'] is not None:
revoked_cert = revoked_cert.add_extension(
x509.InvalidityDate(entry['invalidity_date']),
entry['invalidity_date_critical']
)
crl = crl.add_revoked_certificate(revoked_cert.build(backend))
self.crl = crl.sign(self.privatekey, self.digest, backend=backend)
return self.crl.public_bytes(Encoding.PEM)
def generate(self):
if not self.check(perms_required=False) or self.force:
result = self._generate_crl()
if self.return_content:
self.crl_content = result
if self.backup:
self.backup_file = self.module.backup_local(self.path)
crypto_utils.write_file(self.module, result)
self.changed = True
file_args = self.module.load_file_common_arguments(self.module.params)
if self.module.set_fs_attributes_if_different(file_args, False):
self.changed = True
def _dump_revoked(self, entry):
return {
'serial_number': entry['serial_number'],
'revocation_date': entry['revocation_date'].strftime(TIMESTAMP_FORMAT),
'issuer':
[crypto_utils.cryptography_decode_name(issuer) for issuer in entry['issuer']]
if entry['issuer'] is not None else None,
'issuer_critical': entry['issuer_critical'],
'reason': crypto_utils.REVOCATION_REASON_MAP_INVERSE.get(entry['reason']) if entry['reason'] is not None else None,
'reason_critical': entry['reason_critical'],
'invalidity_date':
entry['invalidity_date'].strftime(TIMESTAMP_FORMAT)
if entry['invalidity_date'] is not None else None,
'invalidity_date_critical': entry['invalidity_date_critical'],
}
def dump(self, check_mode=False):
result = {
'changed': self.changed,
'filename': self.path,
'privatekey': self.privatekey_path,
'last_update': None,
'next_update': None,
'digest': None,
'issuer_ordered': None,
'issuer': None,
'revoked_certificates': [],
}
if self.backup_file:
result['backup_file'] = self.backup_file
if check_mode:
result['last_update'] = self.last_update.strftime(TIMESTAMP_FORMAT)
result['next_update'] = self.next_update.strftime(TIMESTAMP_FORMAT)
# result['digest'] = crypto_utils.cryptography_oid_to_name(self.crl.signature_algorithm_oid)
result['digest'] = self.module.params['digest']
result['issuer_ordered'] = self.issuer
result['issuer'] = {}
for k, v in self.issuer:
result['issuer'][k] = v
result['revoked_certificates'] = []
for entry in self.revoked_certificates:
result['revoked_certificates'].append(self._dump_revoked(entry))
elif self.crl:
result['last_update'] = self.crl.last_update.strftime(TIMESTAMP_FORMAT)
result['next_update'] = self.crl.next_update.strftime(TIMESTAMP_FORMAT)
try:
result['digest'] = crypto_utils.cryptography_oid_to_name(self.crl.signature_algorithm_oid)
except AttributeError:
# Older cryptography versions don't have signature_algorithm_oid yet
dotted = crypto_utils._obj2txt(
self.crl._backend._lib,
self.crl._backend._ffi,
self.crl._x509_crl.sig_alg.algorithm
)
oid = x509.oid.ObjectIdentifier(dotted)
result['digest'] = crypto_utils.cryptography_oid_to_name(oid)
issuer = []
for attribute in self.crl.issuer:
issuer.append([crypto_utils.cryptography_oid_to_name(attribute.oid), attribute.value])
result['issuer_ordered'] = issuer
result['issuer'] = {}
for k, v in issuer:
result['issuer'][k] = v
result['revoked_certificates'] = []
for cert in self.crl:
entry = crypto_utils.cryptography_decode_revoked_certificate(cert)
result['revoked_certificates'].append(self._dump_revoked(entry))
if self.return_content:
result['crl'] = self.crl_content
return result
def main():
module = AnsibleModule(
argument_spec=dict(
state=dict(type='str', default='present', choices=['present', 'absent']),
mode=dict(type='str', default='generate', choices=['generate', 'update']),
force=dict(type='bool', default=False),
backup=dict(type='bool', default=False),
path=dict(type='path', required=True),
privatekey_path=dict(type='path'),
privatekey_content=dict(type='str'),
privatekey_passphrase=dict(type='str', no_log=True),
issuer=dict(type='dict'),
last_update=dict(type='str', default='+0s'),
next_update=dict(type='str'),
digest=dict(type='str', default='sha256'),
ignore_timestamps=dict(type='bool', default=False),
return_content=dict(type='bool', default=False),
revoked_certificates=dict(
type='list',
elements='dict',
options=dict(
path=dict(type='path'),
content=dict(type='str'),
serial_number=dict(type='int'),
revocation_date=dict(type='str', default='+0s'),
issuer=dict(type='list', elements='str'),
issuer_critical=dict(type='bool', default=False),
reason=dict(
type='str',
choices=[
'unspecified', 'key_compromise', 'ca_compromise', 'affiliation_changed',
'superseded', 'cessation_of_operation', 'certificate_hold',
'privilege_withdrawn', 'aa_compromise', 'remove_from_crl'
]
),
reason_critical=dict(type='bool', default=False),
invalidity_date=dict(type='str'),
invalidity_date_critical=dict(type='bool', default=False),
),
required_one_of=[['path', 'content', 'serial_number']],
mutually_exclusive=[['path', 'content', 'serial_number']],
),
),
required_if=[
('state', 'present', ['privatekey_path', 'privatekey_content'], True),
('state', 'present', ['issuer', 'next_update', 'revoked_certificates'], False),
],
mutually_exclusive=(
['privatekey_path', 'privatekey_content'],
),
supports_check_mode=True,
add_file_common_args=True,
)
if not CRYPTOGRAPHY_FOUND:
module.fail_json(msg=missing_required_lib('cryptography >= {0}'.format(MINIMAL_CRYPTOGRAPHY_VERSION)),
exception=CRYPTOGRAPHY_IMP_ERR)
try:
crl = CRL(module)
if module.params['state'] == 'present':
if module.check_mode:
result = crl.dump(check_mode=True)
result['changed'] = module.params['force'] or not crl.check()
module.exit_json(**result)
crl.generate()
else:
if module.check_mode:
result = crl.dump(check_mode=True)
result['changed'] = os.path.exists(module.params['path'])
module.exit_json(**result)
crl.remove()
result = crl.dump()
module.exit_json(**result)
except crypto_utils.OpenSSLObjectError as exc:
module.fail_json(msg=to_native(exc))
if __name__ == "__main__":
main()
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