#!/usr/bin/python
# -*- coding: utf-8 -*-
# Copyrigt: (c) 2017, Yanis Guenane <[email protected]>
# 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: openssl_csr
version_added: '2.4'
short_description: Generate OpenSSL Certificate Signing Request (CSR)
description:
- This module allows one to (re)generate OpenSSL certificate signing requests.
- It uses the pyOpenSSL python library to interact with openssl. This module supports
the subjectAltName, keyUsage, extendedKeyUsage, basicConstraints and OCSP Must Staple
extensions.
- "Please note that the module regenerates existing CSR if it doesn't match the module's
options, or if it seems to be corrupt. If you are concerned that this could overwrite
your existing CSR, consider using the I(backup) option."
- The module can use the cryptography Python library, or the pyOpenSSL Python
library. By default, it tries to detect which one is available. This can be
overridden with the I(select_crypto_backend) option. Please note that the
PyOpenSSL backend was deprecated in Ansible 2.9 and will be removed in Ansible 2.13."
requirements:
- Either cryptography >= 1.3
- Or pyOpenSSL >= 0.15
author:
- Yanis Guenane (@Spredzy)
options:
state:
description:
- Whether the certificate signing request should exist or not, taking action if the state is different from what is stated.
type: str
default: present
choices: [ absent, present ]
digest:
description:
- The digest used when signing the certificate signing request with the private key.
type: str
default: sha256
privatekey_path:
description:
- The path to the private key to use when signing the certificate signing request.
- Required if I(state) is C(present).
type: path
privatekey_passphrase:
description:
- The passphrase for the private key.
- This is required if the private key is password protected.
type: str
version:
description:
- The version of the certificate signing request.
- "The only allowed value according to L(RFC 2986,https://tools.ietf.org/html/rfc2986#section-4.1)
is 1."
type: int
default: 1
force:
description:
- Should the certificate signing request be forced regenerated by this ansible module.
type: bool
default: no
path:
description:
- The name of the file into which the generated OpenSSL certificate signing request will be written.
type: path
required: true
subject:
description:
- Key/value pairs that will be present in the subject name field of the certificate signing request.
- If you need to specify more than one value with the same key, use a list as value.
type: dict
version_added: '2.5'
country_name:
description:
- The countryName field of the certificate signing request subject.
type: str
aliases: [ C, countryName ]
state_or_province_name:
description:
- The stateOrProvinceName field of the certificate signing request subject.
type: str
aliases: [ ST, stateOrProvinceName ]
locality_name:
description:
- The localityName field of the certificate signing request subject.
type: str
aliases: [ L, localityName ]
organization_name:
description:
- The organizationName field of the certificate signing request subject.
type: str
aliases: [ O, organizationName ]
organizational_unit_name:
description:
- The organizationalUnitName field of the certificate signing request subject.
type: str
aliases: [ OU, organizationalUnitName ]
common_name:
description:
- The commonName field of the certificate signing request subject.
type: str
aliases: [ CN, commonName ]
email_address:
description:
- The emailAddress field of the certificate signing request subject.
type: str
aliases: [ E, emailAddress ]
subject_alt_name:
description:
- SAN extension to attach to the certificate signing request.
- This can either be a 'comma separated string' or a YAML list.
- Values must be prefixed by their options. (i.e., C(email), C(URI), C(DNS), C(RID), C(IP), C(dirName),
C(otherName) and the ones specific to your CA)
- Note that if no SAN is specified, but a common name, the common
name will be added as a SAN except if C(useCommonNameForSAN) is
set to I(false).
- More at U(https://tools.ietf.org/html/rfc5280#section-4.2.1.6).
type: list
elements: str
aliases: [ subjectAltName ]
subject_alt_name_critical:
description:
- Should the subjectAltName extension be considered as critical.
type: bool
aliases: [ subjectAltName_critical ]
use_common_name_for_san:
description:
- If set to C(yes), the module will fill the common name in for
C(subject_alt_name) with C(DNS:) prefix if no SAN is specified.
type: bool
default: yes
version_added: '2.8'
aliases: [ useCommonNameForSAN ]
key_usage:
description:
- This defines the purpose (e.g. encipherment, signature, certificate signing)
of the key contained in the certificate.
type: list
elements: str
aliases: [ keyUsage ]
key_usage_critical:
description:
- Should the keyUsage extension be considered as critical.
type: bool
aliases: [ keyUsage_critical ]
extended_key_usage:
description:
- Additional restrictions (e.g. client authentication, server authentication)
on the allowed purposes for which the public key may be used.
type: list
elements: str
aliases: [ extKeyUsage, extendedKeyUsage ]
extended_key_usage_critical:
description:
- Should the extkeyUsage extension be considered as critical.
type: bool
aliases: [ extKeyUsage_critical, extendedKeyUsage_critical ]
basic_constraints:
description:
- Indicates basic constraints, such as if the certificate is a CA.
type: list
elements: str
version_added: '2.5'
aliases: [ basicConstraints ]
basic_constraints_critical:
description:
- Should the basicConstraints extension be considered as critical.
type: bool
version_added: '2.5'
aliases: [ basicConstraints_critical ]
ocsp_must_staple:
description:
- Indicates that the certificate should contain the OCSP Must Staple
extension (U(https://tools.ietf.org/html/rfc7633)).
type: bool
version_added: '2.5'
aliases: [ ocspMustStaple ]
ocsp_must_staple_critical:
description:
- Should the OCSP Must Staple extension be considered as critical
- Note that according to the RFC, this extension should not be marked
as critical, as old clients not knowing about OCSP Must Staple
are required to reject such certificates
(see U(https://tools.ietf.org/html/rfc7633#section-4)).
type: bool
version_added: '2.5'
aliases: [ ocspMustStaple_critical ]
select_crypto_backend:
description:
- Determines which crypto backend to use.
- The default choice is C(auto), which tries to use C(cryptography) if available, and falls back to C(pyopenssl).
- If set to C(pyopenssl), will try to use the L(pyOpenSSL,https://pypi.org/project/pyOpenSSL/) library.
- If set to C(cryptography), will try to use the L(cryptography,https://cryptography.io/) library.
- Please note that the C(pyopenssl) backend has been deprecated in Ansible 2.9, and will be removed in Ansible 2.13.
From that point on, only the C(cryptography) backend will be available.
type: str
default: auto
choices: [ auto, cryptography, pyopenssl ]
version_added: '2.8'
backup:
description:
- Create a backup file including a timestamp so you can get the original
CSR back if you overwrote it with a new one by accident.
type: bool
default: no
version_added: "2.8"
create_subject_key_identifier:
description:
- Create the Subject Key Identifier from the public key.
- "Please note that commercial CAs can ignore the value, respectively use a value of
their own choice instead. Specifying this option is mostly useful for self-signed
certificates or for own CAs."
- Note that this is only supported if the C(cryptography) backend is used!
type: bool
default: no
version_added: "2.9"
subject_key_identifier:
description:
- The subject key identifier as a hex string, where two bytes are separated by colons.
- "Example: C(00:11:22:33:44:55:66:77:88:99:aa:bb:cc:dd:ee:ff:00:11:22:33)"
- "Please note that commercial CAs ignore this value, respectively use a value of their
own choice. Specifying this option is mostly useful for self-signed certificates
or for own CAs."
- Note that this option can only be used if I(create_subject_key_identifier) is C(no).
- Note that this is only supported if the C(cryptography) backend is used!
type: str
version_added: "2.9"
authority_key_identifier:
description:
- The authority key identifier as a hex string, where two bytes are separated by colons.
- "Example: C(00:11:22:33:44:55:66:77:88:99:aa:bb:cc:dd:ee:ff:00:11:22:33)"
- If specified, I(authority_cert_issuer) must also be specified.
- "Please note that commercial CAs ignore this value, respectively use a value of their
own choice. Specifying this option is mostly useful for self-signed certificates
or for own CAs."
- Note that this is only supported if the C(cryptography) backend is used!
- The C(AuthorityKeyIdentifier) will only be added if at least one of I(authority_key_identifier),
I(authority_cert_issuer) and I(authority_cert_serial_number) is specified.
type: str
version_added: "2.9"
authority_cert_issuer:
description:
- Names that will be present in the authority cert issuer field of the certificate signing request.
- Values must be prefixed by their options. (i.e., C(email), C(URI), C(DNS), C(RID), C(IP), C(dirName),
C(otherName) and the ones specific to your CA)
- "Example: C(DNS:ca.example.org)"
- If specified, I(authority_key_identifier) must also be specified.
- "Please note that commercial CAs ignore this value, respectively use a value of their
own choice. Specifying this option is mostly useful for self-signed certificates
or for own CAs."
- Note that this is only supported if the C(cryptography) backend is used!
- The C(AuthorityKeyIdentifier) will only be added if at least one of I(authority_key_identifier),
I(authority_cert_issuer) and I(authority_cert_serial_number) is specified.
type: list
elements: str
version_added: "2.9"
authority_cert_serial_number:
description:
- The authority cert serial number.
- Note that this is only supported if the C(cryptography) backend is used!
- "Please note that commercial CAs ignore this value, respectively use a value of their
own choice. Specifying this option is mostly useful for self-signed certificates
or for own CAs."
- The C(AuthorityKeyIdentifier) will only be added if at least one of I(authority_key_identifier),
I(authority_cert_issuer) and I(authority_cert_serial_number) is specified.
type: int
version_added: "2.9"
extends_documentation_fragment:
- files
notes:
- If the certificate signing request already exists it will be checked whether subjectAltName,
keyUsage, extendedKeyUsage and basicConstraints only contain the requested values, whether
OCSP Must Staple is as requested, and if the request was signed by the given private key.
seealso:
- module: openssl_certificate
- module: openssl_dhparam
- module: openssl_pkcs12
- module: openssl_privatekey
- module: openssl_publickey
'''
EXAMPLES = r'''
- name: Generate an OpenSSL Certificate Signing Request
openssl_csr:
path: /etc/ssl/csr/www.ansible.com.csr
privatekey_path: /etc/ssl/private/ansible.com.pem
common_name: www.ansible.com
- name: Generate an OpenSSL Certificate Signing Request with a passphrase protected private key
openssl_csr:
path: /etc/ssl/csr/www.ansible.com.csr
privatekey_path: /etc/ssl/private/ansible.com.pem
privatekey_passphrase: ansible
common_name: www.ansible.com
- name: Generate an OpenSSL Certificate Signing Request with Subject information
openssl_csr:
path: /etc/ssl/csr/www.ansible.com.csr
privatekey_path: /etc/ssl/private/ansible.com.pem
country_name: FR
organization_name: Ansible
email_address: [email protected]
common_name: www.ansible.com
- name: Generate an OpenSSL Certificate Signing Request with subjectAltName extension
openssl_csr:
path: /etc/ssl/csr/www.ansible.com.csr
privatekey_path: /etc/ssl/private/ansible.com.pem
subject_alt_name: 'DNS:www.ansible.com,DNS:m.ansible.com'
- name: Generate an OpenSSL CSR with subjectAltName extension with dynamic list
openssl_csr:
path: /etc/ssl/csr/www.ansible.com.csr
privatekey_path: /etc/ssl/private/ansible.com.pem
subject_alt_name: "{{ item.value | map('regex_replace', '^', 'DNS:') | list }}"
with_dict:
dns_server:
- www.ansible.com
- m.ansible.com
- name: Force regenerate an OpenSSL Certificate Signing Request
openssl_csr:
path: /etc/ssl/csr/www.ansible.com.csr
privatekey_path: /etc/ssl/private/ansible.com.pem
force: yes
common_name: www.ansible.com
- name: Generate an OpenSSL Certificate Signing Request with special key usages
openssl_csr:
path: /etc/ssl/csr/www.ansible.com.csr
privatekey_path: /etc/ssl/private/ansible.com.pem
common_name: www.ansible.com
key_usage:
- digitalSignature
- keyAgreement
extended_key_usage:
- clientAuth
- name: Generate an OpenSSL Certificate Signing Request with OCSP Must Staple
openssl_csr:
path: /etc/ssl/csr/www.ansible.com.csr
privatekey_path: /etc/ssl/private/ansible.com.pem
common_name: www.ansible.com
ocsp_must_staple: yes
'''
RETURN = r'''
privatekey:
description: Path to the TLS/SSL private key the CSR was generated for
returned: changed or success
type: str
sample: /etc/ssl/private/ansible.com.pem
filename:
description: Path to the generated Certificate Signing Request
returned: changed or success
type: str
sample: /etc/ssl/csr/www.ansible.com.csr
subject:
description: A list of the subject tuples attached to the CSR
returned: changed or success
type: list
elements: list
sample: "[('CN', 'www.ansible.com'), ('O', 'Ansible')]"
subjectAltName:
description: The alternative names this CSR is valid for
returned: changed or success
type: list
elements: str
sample: [ 'DNS:www.ansible.com', 'DNS:m.ansible.com' ]
keyUsage:
description: Purpose for which the public key may be used
returned: changed or success
type: list
elements: str
sample: [ 'digitalSignature', 'keyAgreement' ]
extendedKeyUsage:
description: Additional restriction on the public key purposes
returned: changed or success
type: list
elements: str
sample: [ 'clientAuth' ]
basicConstraints:
description: Indicates if the certificate belongs to a CA
returned: changed or success
type: list
elements: str
sample: ['CA:TRUE', 'pathLenConstraint:0']
ocsp_must_staple:
description: Indicates whether the certificate has the OCSP
Must Staple feature enabled
returned: changed or success
type: bool
sample: false
backup_file:
description: Name of backup file created.
returned: changed and if I(backup) is C(yes)
type: str
sample: /path/to/www.ansible.com.csr.2019-03-09@11:22~
'''
import abc
import binascii
import os
import traceback
from distutils.version import LooseVersion
from ansible.module_utils import crypto as crypto_utils
from ansible.module_utils.basic import AnsibleModule, missing_required_lib
from ansible.module_utils._text import to_native, to_bytes, to_text
from ansible.module_utils.compat import ipaddress as compat_ipaddress
MINIMAL_PYOPENSSL_VERSION = '0.15'
MINIMAL_CRYPTOGRAPHY_VERSION = '1.3'
PYOPENSSL_IMP_ERR = None
try:
import OpenSSL
from OpenSSL import crypto
PYOPENSSL_VERSION = LooseVersion(OpenSSL.__version__)
except ImportError:
PYOPENSSL_IMP_ERR = traceback.format_exc()
PYOPENSSL_FOUND = False
else:
PYOPENSSL_FOUND = True
if OpenSSL.SSL.OPENSSL_VERSION_NUMBER >= 0x10100000:
# OpenSSL 1.1.0 or newer
OPENSSL_MUST_STAPLE_NAME = b"tlsfeature"
OPENSSL_MUST_STAPLE_VALUE = b"status_request"
else:
# OpenSSL 1.0.x or older
OPENSSL_MUST_STAPLE_NAME = b"1.3.6.1.5.5.7.1.24"
OPENSSL_MUST_STAPLE_VALUE = b"DER:30:03:02:01:05"
CRYPTOGRAPHY_IMP_ERR = None
try:
import cryptography
import cryptography.x509
import cryptography.x509.oid
import cryptography.exceptions
import cryptography.hazmat.backends
import cryptography.hazmat.primitives.serialization
import cryptography.hazmat.primitives.hashes
CRYPTOGRAPHY_VERSION = LooseVersion(cryptography.__version__)
except ImportError:
CRYPTOGRAPHY_IMP_ERR = traceback.format_exc()
CRYPTOGRAPHY_FOUND = False
else:
CRYPTOGRAPHY_FOUND = True
CRYPTOGRAPHY_MUST_STAPLE_NAME = cryptography.x509.oid.ObjectIdentifier("1.3.6.1.5.5.7.1.24")
CRYPTOGRAPHY_MUST_STAPLE_VALUE = b"\x30\x03\x02\x01\x05"
class CertificateSigningRequestError(crypto_utils.OpenSSLObjectError):
pass
class CertificateSigningRequestBase(crypto_utils.OpenSSLObject):
def __init__(self, module):
super(CertificateSigningRequestBase, self).__init__(
module.params['path'],
module.params['state'],
module.params['force'],
module.check_mode
)
self.digest = module.params['digest']
self.privatekey_path = module.params['privatekey_path']
self.privatekey_passphrase = module.params['privatekey_passphrase']
self.version = module.params['version']
self.subjectAltName = module.params['subject_alt_name']
self.subjectAltName_critical = module.params['subject_alt_name_critical']
self.keyUsage = module.params['key_usage']
self.keyUsage_critical = module.params['key_usage_critical']
self.extendedKeyUsage = module.params['extended_key_usage']
self.extendedKeyUsage_critical = module.params['extended_key_usage_critical']
self.basicConstraints = module.params['basic_constraints']
self.basicConstraints_critical = module.params['basic_constraints_critical']
self.ocspMustStaple = module.params['ocsp_must_staple']
self.ocspMustStaple_critical = module.params['ocsp_must_staple_critical']
self.create_subject_key_identifier = module.params['create_subject_key_identifier']
self.subject_key_identifier = module.params['subject_key_identifier']
self.authority_key_identifier = module.params['authority_key_identifier']
self.authority_cert_issuer = module.params['authority_cert_issuer']
self.authority_cert_serial_number = module.params['authority_cert_serial_number']
self.request = None
self.privatekey = None
if self.create_subject_key_identifier and self.subject_key_identifier is not None:
module.fail_json(msg='subject_key_identifier cannot be specified if create_subject_key_identifier is true')
self.backup = module.params['backup']
self.backup_file = None
self.subject = [
('C', module.params['country_name']),
('ST', module.params['state_or_province_name']),
('L', module.params['locality_name']),
('O', module.params['organization_name']),
('OU', module.params['organizational_unit_name']),
('CN', module.params['common_name']),
('emailAddress', module.params['email_address']),
]
if module.params['subject']:
self.subject = self.subject + crypto_utils.parse_name_field(module.params['subject'])
self.subject = [(entry[0], entry[1]) for entry in self.subject if entry[1]]
if not self.subjectAltName and module.params['use_common_name_for_san']:
for sub in self.subject:
if sub[0] in ('commonName', 'CN'):
self.subjectAltName = ['DNS:%s' % sub[1]]
break
if self.subject_key_identifier is not None:
try:
self.subject_key_identifier = binascii.unhexlify(self.subject_key_identifier.replace(':', ''))
except Exception as e:
raise CertificateSigningRequestError('Cannot parse subject_key_identifier: {0}'.format(e))
if self.authority_key_identifier is not None:
try:
self.authority_key_identifier = binascii.unhexlify(self.authority_key_identifier.replace(':', ''))
except Exception as e:
raise CertificateSigningRequestError('Cannot parse authority_key_identifier: {0}'.format(e))
@abc.abstractmethod
def _generate_csr(self):
pass
def generate(self, module):
'''Generate the certificate signing request.'''
if not self.check(module, perms_required=False) or self.force:
result = self._generate_csr()
if self.backup:
self.backup_file = module.backup_local(self.path)
crypto_utils.write_file(module, result)
self.changed = True
file_args = module.load_file_common_arguments(module.params)
if module.set_fs_attributes_if_different(file_args, False):
self.changed = True
@abc.abstractmethod
def _load_private_key(self):
pass
@abc.abstractmethod
def _check_csr(self):
pass
def check(self, module, perms_required=True):
"""Ensure the resource is in its desired state."""
state_and_perms = super(CertificateSigningRequestBase, self).check(module, perms_required)
self._load_private_key()
if not state_and_perms:
return False
return self._check_csr()
def remove(self, module):
if self.backup:
self.backup_file = module.backup_local(self.path)
super(CertificateSigningRequestBase, self).remove(module)
def dump(self):
'''Serialize the object into a dictionary.'''
result = {
'privatekey': self.privatekey_path,
'filename': self.path,
'subject': self.subject,
'subjectAltName': self.subjectAltName,
'keyUsage': self.keyUsage,
'extendedKeyUsage': self.extendedKeyUsage,
'basicConstraints': self.basicConstraints,
'ocspMustStaple': self.ocspMustStaple,
'changed': self.changed
}
if self.backup_file:
result['backup_file'] = self.backup_file
return result
class CertificateSigningRequestPyOpenSSL(CertificateSigningRequestBase):
def __init__(self, module):
if module.params['create_subject_key_identifier']:
module.fail_json(msg='You cannot use create_subject_key_identifier with the pyOpenSSL backend!')
for o in ('subject_key_identifier', 'authority_key_identifier', 'authority_cert_issuer', 'authority_cert_serial_number'):
if module.params[o] is not None:
module.fail_json(msg='You cannot use {0} with the pyOpenSSL backend!'.format(o))
super(CertificateSigningRequestPyOpenSSL, self).__init__(module)
def _generate_csr(self):
req = crypto.X509Req()
req.set_version(self.version - 1)
subject = req.get_subject()
for entry in self.subject:
if entry[1] is not None:
# Workaround for https://github.com/pyca/pyopenssl/issues/165
nid = OpenSSL._util.lib.OBJ_txt2nid(to_bytes(entry[0]))
if nid == 0:
raise CertificateSigningRequestError('Unknown subject field identifier "{0}"'.format(entry[0]))
res = OpenSSL._util.lib.X509_NAME_add_entry_by_NID(subject._name, nid, OpenSSL._util.lib.MBSTRING_UTF8, to_bytes(entry[1]), -1, -1, 0)
if res == 0:
raise CertificateSigningRequestError('Invalid value for subject field identifier "{0}": {1}'.format(entry[0], entry[1]))
extensions = []
if self.subjectAltName:
altnames = ', '.join(self.subjectAltName)
try:
extensions.append(crypto.X509Extension(b"subjectAltName", self.subjectAltName_critical, altnames.encode('ascii')))
except OpenSSL.crypto.Error as e:
raise CertificateSigningRequestError(
'Error while parsing Subject Alternative Names {0} (check for missing type prefix, such as "DNS:"!): {1}'.format(
', '.join(["{0}".format(san) for san in self.subjectAltName]), str(e)
)
)
if self.keyUsage:
usages = ', '.join(self.keyUsage)
extensions.append(crypto.X509Extension(b"keyUsage", self.keyUsage_critical, usages.encode('ascii')))
if self.extendedKeyUsage:
usages = ', '.join(self.extendedKeyUsage)
extensions.append(crypto.X509Extension(b"extendedKeyUsage", self.extendedKeyUsage_critical, usages.encode('ascii')))
if self.basicConstraints:
usages = ', '.join(self.basicConstraints)
extensions.append(crypto.X509Extension(b"basicConstraints", self.basicConstraints_critical, usages.encode('ascii')))
if self.ocspMustStaple:
extensions.append(crypto.X509Extension(OPENSSL_MUST_STAPLE_NAME, self.ocspMustStaple_critical, OPENSSL_MUST_STAPLE_VALUE))
if extensions:
req.add_extensions(extensions)
req.set_pubkey(self.privatekey)
req.sign(self.privatekey, self.digest)
self.request = req
return crypto.dump_certificate_request(crypto.FILETYPE_PEM, self.request)
def _load_private_key(self):
try:
self.privatekey = crypto_utils.load_privatekey(self.privatekey_path, self.privatekey_passphrase)
except crypto_utils.OpenSSLBadPassphraseError as exc:
raise CertificateSigningRequestError(exc)
def _normalize_san(self, san):
# Apparently OpenSSL returns 'IP address' not 'IP' as specifier when converting the subjectAltName to string
# although it won't accept this specifier when generating the CSR. (https://github.com/openssl/openssl/issues/4004)
if san.startswith('IP Address:'):
san = 'IP:' + san[len('IP Address:'):]
if san.startswith('IP:'):
ip = compat_ipaddress.ip_address(san[3:])
san = 'IP:{0}'.format(ip.compressed)
return san
def _check_csr(self):
def _check_subject(csr):
subject = [(OpenSSL._util.lib.OBJ_txt2nid(to_bytes(sub[0])), to_bytes(sub[1])) for sub in self.subject]
current_subject = [(OpenSSL._util.lib.OBJ_txt2nid(to_bytes(sub[0])), to_bytes(sub[1])) for sub in csr.get_subject().get_components()]
if not set(subject) == set(current_subject):
return False
return True
def _check_subjectAltName(extensions):
altnames_ext = next((ext for ext in extensions if ext.get_short_name() == b'subjectAltName'), '')
altnames = [self._normalize_san(altname.strip()) for altname in
to_text(altnames_ext, errors='surrogate_or_strict').split(',') if altname.strip()]
if self.subjectAltName:
if (set(altnames) != set([self._normalize_san(to_text(name)) for name in self.subjectAltName]) or
altnames_ext.get_critical() != self.subjectAltName_critical):
return False
else:
if altnames:
return False
return True
def _check_keyUsage_(extensions, extName, expected, critical):
usages_ext = [ext for ext in extensions if ext.get_short_name() == extName]
if (not usages_ext and expected) or (usages_ext and not expected):
return False
elif not usages_ext and not expected:
return True
else:
current = [OpenSSL._util.lib.OBJ_txt2nid(to_bytes(usage.strip())) for usage in str(usages_ext[0]).split(',')]
expected = [OpenSSL._util.lib.OBJ_txt2nid(to_bytes(usage)) for usage in expected]
return set(current) == set(expected) and usages_ext[0].get_critical() == critical
def _check_keyUsage(extensions):
usages_ext = [ext for ext in extensions if ext.get_short_name() == b'keyUsage']
if (not usages_ext and self.keyUsage) or (usages_ext and not self.keyUsage):
return False
elif not usages_ext and not self.keyUsage:
return True
else:
# OpenSSL._util.lib.OBJ_txt2nid() always returns 0 for all keyUsage values
# (since keyUsage has a fixed bitfield for these values and is not extensible).
# Therefore, we create an extension for the wanted values, and compare the
# data of the extensions (which is the serialized bitfield).
expected_ext = crypto.X509Extension(b"keyUsage", False, ', '.join(self.keyUsage).encode('ascii'))
return usages_ext[0].get_data() == expected_ext.get_data() and usages_ext[0].get_critical() == self.keyUsage_critical
def _check_extenededKeyUsage(extensions):
return _check_keyUsage_(extensions, b'extendedKeyUsage', self.extendedKeyUsage, self.extendedKeyUsage_critical)
def _check_basicConstraints(extensions):
return _check_keyUsage_(extensions, b'basicConstraints', self.basicConstraints, self.basicConstraints_critical)
def _check_ocspMustStaple(extensions):
oms_ext = [ext for ext in extensions if to_bytes(ext.get_short_name()) == OPENSSL_MUST_STAPLE_NAME and to_bytes(ext) == OPENSSL_MUST_STAPLE_VALUE]
if OpenSSL.SSL.OPENSSL_VERSION_NUMBER < 0x10100000:
# Older versions of libssl don't know about OCSP Must Staple
oms_ext.extend([ext for ext in extensions if ext.get_short_name() == b'UNDEF' and ext.get_data() == b'\x30\x03\x02\x01\x05'])
if self.ocspMustStaple:
return len(oms_ext) > 0 and oms_ext[0].get_critical() == self.ocspMustStaple_critical
else:
return len(oms_ext) == 0
def _check_extensions(csr):
extensions = csr.get_extensions()
return (_check_subjectAltName(extensions) and _check_keyUsage(extensions) and
_check_extenededKeyUsage(extensions) and _check_basicConstraints(extensions) and
_check_ocspMustStaple(extensions))
def _check_signature(csr):
try:
return csr.verify(self.privatekey)
except crypto.Error:
return False
try:
csr = crypto_utils.load_certificate_request(self.path, backend='pyopenssl')
except Exception as dummy:
return False
return _check_subject(csr) and _check_extensions(csr) and _check_signature(csr)
class CertificateSigningRequestCryptography(CertificateSigningRequestBase):
def __init__(self, module):
super(CertificateSigningRequestCryptography, self).__init__(module)
self.cryptography_backend = cryptography.hazmat.backends.default_backend()
self.module = module
if self.version != 1:
module.warn('The cryptography backend only supports version 1. (The only valid value according to RFC 2986.)')
def _generate_csr(self):
csr = cryptography.x509.CertificateSigningRequestBuilder()
try:
csr = csr.subject_name(cryptography.x509.Name([
cryptography.x509.NameAttribute(crypto_utils.cryptography_name_to_oid(entry[0]), to_text(entry[1])) for entry in self.subject
]))
except ValueError as e:
raise CertificateSigningRequestError(e)
if self.subjectAltName:
csr = csr.add_extension(cryptography.x509.SubjectAlternativeName([
crypto_utils.cryptography_get_name(name) for name in self.subjectAltName
]), critical=self.subjectAltName_critical)
if self.keyUsage:
params = crypto_utils.cryptography_parse_key_usage_params(self.keyUsage)
csr = csr.add_extension(cryptography.x509.KeyUsage(**params), critical=self.keyUsage_critical)
if self.extendedKeyUsage:
usages = [crypto_utils.cryptography_name_to_oid(usage) for usage in self.extendedKeyUsage]
csr = csr.add_extension(cryptography.x509.ExtendedKeyUsage(usages), critical=self.extendedKeyUsage_critical)
if self.basicConstraints:
params = {}
ca, path_length = crypto_utils.cryptography_get_basic_constraints(self.basicConstraints)
csr = csr.add_extension(cryptography.x509.BasicConstraints(ca, path_length), critical=self.basicConstraints_critical)
if self.ocspMustStaple:
try:
# This only works with cryptography >= 2.1
csr = csr.add_extension(cryptography.x509.TLSFeature([cryptography.x509.TLSFeatureType.status_request]), critical=self.ocspMustStaple_critical)
except AttributeError as dummy:
csr = csr.add_extension(
cryptography.x509.UnrecognizedExtension(CRYPTOGRAPHY_MUST_STAPLE_NAME, CRYPTOGRAPHY_MUST_STAPLE_VALUE),
critical=self.ocspMustStaple_critical
)
if self.create_subject_key_identifier:
csr = csr.add_extension(
cryptography.x509.SubjectKeyIdentifier.from_public_key(self.privatekey.public_key()),
critical=False
)
elif self.subject_key_identifier is not None:
csr = csr.add_extension(cryptography.x509.SubjectKeyIdentifier(self.subject_key_identifier), critical=False)
if self.authority_key_identifier is not None or self.authority_cert_issuer is not None or self.authority_cert_serial_number is not None:
issuers = None
if self.authority_cert_issuer is not None:
issuers = [crypto_utils.cryptography_get_name(n) for n in self.authority_cert_issuer]
csr = csr.add_extension(
cryptography.x509.AuthorityKeyIdentifier(self.authority_key_identifier, issuers, self.authority_cert_serial_number),
critical=False
)
digest = None
if crypto_utils.cryptography_key_needs_digest_for_signing(self.privatekey):
if self.digest == 'sha256':
digest = cryptography.hazmat.primitives.hashes.SHA256()
elif self.digest == 'sha384':
digest = cryptography.hazmat.primitives.hashes.SHA384()
elif self.digest == 'sha512':
digest = cryptography.hazmat.primitives.hashes.SHA512()
elif self.digest == 'sha1':
digest = cryptography.hazmat.primitives.hashes.SHA1()
elif self.digest == 'md5':
digest = cryptography.hazmat.primitives.hashes.MD5()
# FIXME
else:
raise CertificateSigningRequestError('Unsupported digest "{0}"'.format(self.digest))
try:
self.request = csr.sign(self.privatekey, digest, self.cryptography_backend)
except TypeError as e:
if str(e) == 'Algorithm must be a registered hash algorithm.' and digest is None:
self.module.fail_json(msg='Signing with Ed25519 and Ed448 keys requires cryptography 2.8 or newer.')
raise
return self.request.public_bytes(cryptography.hazmat.primitives.serialization.Encoding.PEM)
def _load_private_key(self):
try:
with open(self.privatekey_path, 'rb') as f:
self.privatekey = cryptography.hazmat.primitives.serialization.load_pem_private_key(
f.read(),
None if self.privatekey_passphrase is None else to_bytes(self.privatekey_passphrase),
backend=self.cryptography_backend
)
except Exception as e:
raise CertificateSigningRequestError(e)
def _check_csr(self):
def _check_subject(csr):
subject = [(crypto_utils.cryptography_name_to_oid(entry[0]), entry[1]) for entry in self.subject]
current_subject = [(sub.oid, sub.value) for sub in csr.subject]
return set(subject) == set(current_subject)
def _find_extension(extensions, exttype):
return next(
(ext for ext in extensions if isinstance(ext.value, exttype)),
None
)
def _check_subjectAltName(extensions):
current_altnames_ext = _find_extension(extensions, cryptography.x509.SubjectAlternativeName)
current_altnames = [str(altname) for altname in current_altnames_ext.value] if current_altnames_ext else []
altnames = [str(crypto_utils.cryptography_get_name(altname)) for altname in self.subjectAltName] if self.subjectAltName else []
if set(altnames) != set(current_altnames):
return False
if altnames:
if current_altnames_ext.critical != self.subjectAltName_critical:
return False
return True
def _check_keyUsage(extensions):
current_keyusage_ext = _find_extension(extensions, cryptography.x509.KeyUsage)
if not self.keyUsage:
return current_keyusage_ext is None
elif current_keyusage_ext is None:
return False
params = crypto_utils.cryptography_parse_key_usage_params(self.keyUsage)
for param in params:
if getattr(current_keyusage_ext.value, '_' + param) != params[param]:
return False
if current_keyusage_ext.critical != self.keyUsage_critical:
return False
return True
def _check_extenededKeyUsage(extensions):
current_usages_ext = _find_extension(extensions, cryptography.x509.ExtendedKeyUsage)
current_usages = [str(usage) for usage in current_usages_ext.value] if current_usages_ext else []
usages = [str(crypto_utils.cryptography_name_to_oid(usage)) for usage in self.extendedKeyUsage] if self.extendedKeyUsage else []
if set(current_usages) != set(usages):
return False
if usages:
if current_usages_ext.critical != self.extendedKeyUsage_critical:
return False
return True
def _check_basicConstraints(extensions):
bc_ext = _find_extension(extensions, cryptography.x509.BasicConstraints)
current_ca = bc_ext.value.ca if bc_ext else False
current_path_length = bc_ext.value.path_length if bc_ext else None
ca, path_length = crypto_utils.cryptography_get_basic_constraints(self.basicConstraints)
# Check CA flag
if ca != current_ca:
return False
# Check path length
if path_length != current_path_length:
return False
# Check criticality
if self.basicConstraints:
return bc_ext is not None and bc_ext.critical == self.basicConstraints_critical
else:
return bc_ext is None
def _check_ocspMustStaple(extensions):
try:
# This only works with cryptography >= 2.1
tlsfeature_ext = _find_extension(extensions, cryptography.x509.TLSFeature)
has_tlsfeature = True
except AttributeError as dummy:
tlsfeature_ext = next(
(ext for ext in extensions if ext.value.oid == CRYPTOGRAPHY_MUST_STAPLE_NAME),
None
)
has_tlsfeature = False
if self.ocspMustStaple:
if not tlsfeature_ext or tlsfeature_ext.critical != self.ocspMustStaple_critical:
return False
if has_tlsfeature:
return cryptography.x509.TLSFeatureType.status_request in tlsfeature_ext.value
else:
return tlsfeature_ext.value.value == CRYPTOGRAPHY_MUST_STAPLE_VALUE
else:
return tlsfeature_ext is None
def _check_subject_key_identifier(extensions):
ext = _find_extension(extensions, cryptography.x509.SubjectKeyIdentifier)
if self.create_subject_key_identifier or self.subject_key_identifier is not None:
if not ext or ext.critical:
return False
if self.create_subject_key_identifier:
digest = cryptography.x509.SubjectKeyIdentifier.from_public_key(self.privatekey.public_key()).digest
return ext.value.digest == digest
else:
return ext.value.digest == self.subject_key_identifier
else:
return ext is None
def _check_authority_key_identifier(extensions):
ext = _find_extension(extensions, cryptography.x509.AuthorityKeyIdentifier)
if self.authority_key_identifier is not None or self.authority_cert_issuer is not None or self.authority_cert_serial_number is not None:
if not ext or ext.critical:
return False
aci = None
csr_aci = None
if self.authority_cert_issuer is not None:
aci = [str(crypto_utils.cryptography_get_name(n)) for n in self.authority_cert_issuer]
if ext.value.authority_cert_issuer is not None:
csr_aci = [str(n) for n in ext.value.authority_cert_issuer]
return (ext.value.key_identifier == self.authority_key_identifier
and csr_aci == aci
and ext.value.authority_cert_serial_number == self.authority_cert_serial_number)
else:
return ext is None
def _check_extensions(csr):
extensions = csr.extensions
return (_check_subjectAltName(extensions) and _check_keyUsage(extensions) and
_check_extenededKeyUsage(extensions) and _check_basicConstraints(extensions) and
_check_ocspMustStaple(extensions) and _check_subject_key_identifier(extensions) and
_check_authority_key_identifier(extensions))
def _check_signature(csr):
if not csr.is_signature_valid:
return False
# To check whether public key of CSR belongs to private key,
# encode both public keys and compare PEMs.
key_a = csr.public_key().public_bytes(
cryptography.hazmat.primitives.serialization.Encoding.PEM,
cryptography.hazmat.primitives.serialization.PublicFormat.SubjectPublicKeyInfo
)
key_b = self.privatekey.public_key().public_bytes(
cryptography.hazmat.primitives.serialization.Encoding.PEM,
cryptography.hazmat.primitives.serialization.PublicFormat.SubjectPublicKeyInfo
)
return key_a == key_b
try:
csr = crypto_utils.load_certificate_request(self.path, backend='cryptography')
except Exception as dummy:
return False
return _check_subject(csr) and _check_extensions(csr) and _check_signature(csr)
def main():
module = AnsibleModule(
argument_spec=dict(
state=dict(type='str', default='present', choices=['absent', 'present']),
digest=dict(type='str', default='sha256'),
privatekey_path=dict(type='path'),
privatekey_passphrase=dict(type='str', no_log=True),
version=dict(type='int', default=1),
force=dict(type='bool', default=False),
path=dict(type='path', required=True),
subject=dict(type='dict'),
country_name=dict(type='str', aliases=['C', 'countryName']),
state_or_province_name=dict(type='str', aliases=['ST', 'stateOrProvinceName']),
locality_name=dict(type='str', aliases=['L', 'localityName']),
organization_name=dict(type='str', aliases=['O', 'organizationName']),
organizational_unit_name=dict(type='str', aliases=['OU', 'organizationalUnitName']),
common_name=dict(type='str', aliases=['CN', 'commonName']),
email_address=dict(type='str', aliases=['E', 'emailAddress']),
subject_alt_name=dict(type='list', elements='str', aliases=['subjectAltName']),
subject_alt_name_critical=dict(type='bool', default=False, aliases=['subjectAltName_critical']),
use_common_name_for_san=dict(type='bool', default=True, aliases=['useCommonNameForSAN']),
key_usage=dict(type='list', elements='str', aliases=['keyUsage']),
key_usage_critical=dict(type='bool', default=False, aliases=['keyUsage_critical']),
extended_key_usage=dict(type='list', elements='str', aliases=['extKeyUsage', 'extendedKeyUsage']),
extended_key_usage_critical=dict(type='bool', default=False, aliases=['extKeyUsage_critical', 'extendedKeyUsage_critical']),
basic_constraints=dict(type='list', elements='str', aliases=['basicConstraints']),
basic_constraints_critical=dict(type='bool', default=False, aliases=['basicConstraints_critical']),
ocsp_must_staple=dict(type='bool', default=False, aliases=['ocspMustStaple']),
ocsp_must_staple_critical=dict(type='bool', default=False, aliases=['ocspMustStaple_critical']),
backup=dict(type='bool', default=False),
create_subject_key_identifier=dict(type='bool', default=False),
subject_key_identifier=dict(type='str'),
authority_key_identifier=dict(type='str'),
authority_cert_issuer=dict(type='list', elements='str'),
authority_cert_serial_number=dict(type='int'),
select_crypto_backend=dict(type='str', default='auto', choices=['auto', 'cryptography', 'pyopenssl']),
),
required_together=[('authority_cert_issuer', 'authority_cert_serial_number')],
required_if=[('state', 'present', ['privatekey_path'])],
add_file_common_args=True,
supports_check_mode=True,
)
base_dir = os.path.dirname(module.params['path']) or '.'
if not os.path.isdir(base_dir):
module.fail_json(name=base_dir, msg='The directory %s does not exist or the file is not a directory' % base_dir)
backend = module.params['select_crypto_backend']
if backend == 'auto':
# Detection what is possible
can_use_cryptography = CRYPTOGRAPHY_FOUND and CRYPTOGRAPHY_VERSION >= LooseVersion(MINIMAL_CRYPTOGRAPHY_VERSION)
can_use_pyopenssl = PYOPENSSL_FOUND and PYOPENSSL_VERSION >= LooseVersion(MINIMAL_PYOPENSSL_VERSION)
# First try cryptography, then pyOpenSSL
if can_use_cryptography:
backend = 'cryptography'
elif can_use_pyopenssl:
backend = 'pyopenssl'
# Success?
if backend == 'auto':
module.fail_json(msg=("Can't detect any of the required Python libraries "
"cryptography (>= {0}) or PyOpenSSL (>= {1})").format(
MINIMAL_CRYPTOGRAPHY_VERSION,
MINIMAL_PYOPENSSL_VERSION))
try:
if backend == 'pyopenssl':
if not PYOPENSSL_FOUND:
module.fail_json(msg=missing_required_lib('pyOpenSSL >= {0}'.format(MINIMAL_PYOPENSSL_VERSION)),
exception=PYOPENSSL_IMP_ERR)
try:
getattr(crypto.X509Req, 'get_extensions')
except AttributeError:
module.fail_json(msg='You need to have PyOpenSSL>=0.15 to generate CSRs')
module.deprecate('The module is using the PyOpenSSL backend. This backend has been deprecated', version='2.13')
csr = CertificateSigningRequestPyOpenSSL(module)
elif backend == 'cryptography':
if not CRYPTOGRAPHY_FOUND:
module.fail_json(msg=missing_required_lib('cryptography >= {0}'.format(MINIMAL_CRYPTOGRAPHY_VERSION)),
exception=CRYPTOGRAPHY_IMP_ERR)
csr = CertificateSigningRequestCryptography(module)
if module.params['state'] == 'present':
if module.check_mode:
result = csr.dump()
result['changed'] = module.params['force'] or not csr.check(module)
module.exit_json(**result)
csr.generate(module)
else:
if module.check_mode:
result = csr.dump()
result['changed'] = os.path.exists(module.params['path'])
module.exit_json(**result)
csr.remove(module)
result = csr.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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