#!/usr/bin/python
# -*- coding: utf-8 -*-
# Copyright: (c) 2016, 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_publickey
version_added: "2.3"
short_description: Generate an OpenSSL public key from its private key.
description:
- This module allows one to (re)generate OpenSSL public keys from their private keys.
- Keys are generated in PEM or OpenSSH format.
- 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. When I(format) is C(OpenSSH),
the C(cryptography) backend has to be used. Please note that the PyOpenSSL backend
was deprecated in Ansible 2.9 and will be removed in Ansible 2.13."
requirements:
- Either cryptography >= 1.2.3 (older versions might work as well)
- Or pyOpenSSL >= 16.0.0
- Needs cryptography >= 1.4 if I(format) is C(OpenSSH)
author:
- Yanis Guenane (@Spredzy)
- Felix Fontein (@felixfontein)
options:
state:
description:
- Whether the public key should exist or not, taking action if the state is different from what is stated.
type: str
default: present
choices: [ absent, present ]
force:
description:
- Should the key be regenerated even it it already exists.
type: bool
default: no
format:
description:
- The format of the public key.
type: str
default: PEM
choices: [ OpenSSH, PEM ]
version_added: "2.4"
path:
description:
- Name of the file in which the generated TLS/SSL public key will be written.
type: path
required: true
privatekey_path:
description:
- Path to the TLS/SSL private key from which to generate the public key.
- Required if I(state) is C(present).
type: path
privatekey_passphrase:
description:
- The passphrase for the private key.
type: str
version_added: "2.4"
backup:
description:
- Create a backup file including a timestamp so you can get the original
public key back if you overwrote it with a different one by accident.
type: bool
default: no
version_added: "2.8"
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.
type: str
default: auto
choices: [ auto, cryptography, pyopenssl ]
version_added: "2.9"
extends_documentation_fragment:
- files
seealso:
- module: openssl_certificate
- module: openssl_csr
- module: openssl_dhparam
- module: openssl_pkcs12
- module: openssl_privatekey
'''
EXAMPLES = r'''
- name: Generate an OpenSSL public key in PEM format
openssl_publickey:
path: /etc/ssl/public/ansible.com.pem
privatekey_path: /etc/ssl/private/ansible.com.pem
- name: Generate an OpenSSL public key in OpenSSH v2 format
openssl_publickey:
path: /etc/ssl/public/ansible.com.pem
privatekey_path: /etc/ssl/private/ansible.com.pem
format: OpenSSH
- name: Generate an OpenSSL public key with a passphrase protected private key
openssl_publickey:
path: /etc/ssl/public/ansible.com.pem
privatekey_path: /etc/ssl/private/ansible.com.pem
privatekey_passphrase: ansible
- name: Force regenerate an OpenSSL public key if it already exists
openssl_publickey:
path: /etc/ssl/public/ansible.com.pem
privatekey_path: /etc/ssl/private/ansible.com.pem
force: yes
- name: Remove an OpenSSL public key
openssl_publickey:
path: /etc/ssl/public/ansible.com.pem
privatekey_path: /etc/ssl/private/ansible.com.pem
state: absent
'''
RETURN = r'''
privatekey:
description: Path to the TLS/SSL private key the public key was generated from.
returned: changed or success
type: str
sample: /etc/ssl/private/ansible.com.pem
format:
description: The format of the public key (PEM, OpenSSH, ...).
returned: changed or success
type: str
sample: PEM
filename:
description: Path to the generated TLS/SSL public key file.
returned: changed or success
type: str
sample: /etc/ssl/public/ansible.com.pem
fingerprint:
description:
- The fingerprint of the public key. Fingerprint will be generated for each hashlib.algorithms available.
- Requires PyOpenSSL >= 16.0 for meaningful output.
returned: changed or success
type: dict
sample:
md5: "84:75:71:72:8d:04:b5:6c:4d:37:6d:66:83:f5:4c:29"
sha1: "51:cc:7c:68:5d:eb:41:43:88:7e:1a:ae:c7:f8:24:72:ee:71:f6:10"
sha224: "b1:19:a6:6c:14:ac:33:1d:ed:18:50:d3:06:5c:b2:32:91:f1:f1:52:8c:cb:d5:75:e9:f5:9b:46"
sha256: "41:ab:c7:cb:d5:5f:30:60:46:99:ac:d4:00:70:cf:a1:76:4f:24:5d:10:24:57:5d:51:6e:09:97:df:2f:de:c7"
sha384: "85:39:50:4e:de:d9:19:33:40:70:ae:10:ab:59:24:19:51:c3:a2:e4:0b:1c:b1:6e:dd:b3:0c:d9:9e:6a:46:af:da:18:f8:ef:ae:2e:c0:9a:75:2c:9b:b3:0f:3a:5f:3d"
sha512: "fd:ed:5e:39:48:5f:9f:fe:7f:25:06:3f:79:08:cd:ee:a5:e7:b3:3d:13:82:87:1f:84:e1:f5:c7:28:77:53:94:86:56:38:69:f0:d9:35:22:01:1e:a6:60:...:0f:9b"
backup_file:
description: Name of backup file created.
returned: changed and if I(backup) is C(yes)
type: str
sample: /path/to/publickey.pem.2019-03-09@11:22~
'''
import os
import traceback
from distutils.version import LooseVersion
MINIMAL_PYOPENSSL_VERSION = '16.0.0'
MINIMAL_CRYPTOGRAPHY_VERSION = '1.2.3'
MINIMAL_CRYPTOGRAPHY_VERSION_OPENSSH = '1.4'
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
CRYPTOGRAPHY_IMP_ERR = None
try:
import cryptography
from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives import serialization as crypto_serialization
CRYPTOGRAPHY_VERSION = LooseVersion(cryptography.__version__)
except ImportError:
CRYPTOGRAPHY_IMP_ERR = traceback.format_exc()
CRYPTOGRAPHY_FOUND = False
else:
CRYPTOGRAPHY_FOUND = True
from ansible.module_utils import crypto as crypto_utils
from ansible.module_utils._text import to_native, to_bytes
from ansible.module_utils.basic import AnsibleModule, missing_required_lib
class PublicKeyError(crypto_utils.OpenSSLObjectError):
pass
class PublicKey(crypto_utils.OpenSSLObject):
def __init__(self, module, backend):
super(PublicKey, self).__init__(
module.params['path'],
module.params['state'],
module.params['force'],
module.check_mode
)
self.format = module.params['format']
self.privatekey_path = module.params['privatekey_path']
self.privatekey_passphrase = module.params['privatekey_passphrase']
self.privatekey = None
self.fingerprint = {}
self.backend = backend
self.backup = module.params['backup']
self.backup_file = None
def _create_publickey(self, module):
self.privatekey = crypto_utils.load_privatekey(
self.privatekey_path,
self.privatekey_passphrase,
backend=self.backend
)
if self.backend == 'cryptography':
if self.format == 'OpenSSH':
return self.privatekey.public_key().public_bytes(
crypto_serialization.Encoding.OpenSSH,
crypto_serialization.PublicFormat.OpenSSH
)
else:
return self.privatekey.public_key().public_bytes(
crypto_serialization.Encoding.PEM,
crypto_serialization.PublicFormat.SubjectPublicKeyInfo
)
else:
try:
return crypto.dump_publickey(crypto.FILETYPE_PEM, self.privatekey)
except AttributeError as dummy:
raise PublicKeyError('You need to have PyOpenSSL>=16.0.0 to generate public keys')
def generate(self, module):
"""Generate the public key."""
if not os.path.exists(self.privatekey_path):
raise PublicKeyError(
'The private key %s does not exist' % self.privatekey_path
)
if not self.check(module, perms_required=False) or self.force:
try:
publickey_content = self._create_publickey(module)
if self.backup:
self.backup_file = module.backup_local(self.path)
crypto_utils.write_file(module, publickey_content)
self.changed = True
except crypto_utils.OpenSSLBadPassphraseError as exc:
raise PublicKeyError(exc)
except (IOError, OSError) as exc:
raise PublicKeyError(exc)
self.fingerprint = crypto_utils.get_fingerprint(
self.privatekey_path,
passphrase=self.privatekey_passphrase,
backend=self.backend,
)
file_args = module.load_file_common_arguments(module.params)
if module.set_fs_attributes_if_different(file_args, False):
self.changed = True
def check(self, module, perms_required=True):
"""Ensure the resource is in its desired state."""
state_and_perms = super(PublicKey, self).check(module, perms_required)
def _check_privatekey():
if not os.path.exists(self.privatekey_path):
return False
try:
with open(self.path, 'rb') as public_key_fh:
publickey_content = public_key_fh.read()
if self.backend == 'cryptography':
if self.format == 'OpenSSH':
# Read and dump public key. Makes sure that the comment is stripped off.
current_publickey = crypto_serialization.load_ssh_public_key(publickey_content, backend=default_backend())
publickey_content = current_publickey.public_bytes(
crypto_serialization.Encoding.OpenSSH,
crypto_serialization.PublicFormat.OpenSSH
)
else:
current_publickey = crypto_serialization.load_pem_public_key(publickey_content, backend=default_backend())
publickey_content = current_publickey.public_bytes(
crypto_serialization.Encoding.PEM,
crypto_serialization.PublicFormat.SubjectPublicKeyInfo
)
else:
publickey_content = crypto.dump_publickey(
crypto.FILETYPE_PEM,
crypto.load_publickey(crypto.FILETYPE_PEM, publickey_content)
)
except Exception as dummy:
return False
try:
desired_publickey = self._create_publickey(module)
except crypto_utils.OpenSSLBadPassphraseError as exc:
raise PublicKeyError(exc)
return publickey_content == desired_publickey
if not state_and_perms:
return state_and_perms
return _check_privatekey()
def remove(self, module):
if self.backup:
self.backup_file = module.backup_local(self.path)
super(PublicKey, self).remove(module)
def dump(self):
"""Serialize the object into a dictionary."""
result = {
'privatekey': self.privatekey_path,
'filename': self.path,
'format': self.format,
'changed': self.changed,
'fingerprint': self.fingerprint,
}
if self.backup_file:
result['backup_file'] = self.backup_file
return result
def main():
module = AnsibleModule(
argument_spec=dict(
state=dict(type='str', default='present', choices=['present', 'absent']),
force=dict(type='bool', default=False),
path=dict(type='path', required=True),
privatekey_path=dict(type='path'),
format=dict(type='str', default='PEM', choices=['OpenSSH', 'PEM']),
privatekey_passphrase=dict(type='str', no_log=True),
backup=dict(type='bool', default=False),
select_crypto_backend=dict(type='str', choices=['auto', 'pyopenssl', 'cryptography'], default='auto'),
),
supports_check_mode=True,
add_file_common_args=True,
required_if=[('state', 'present', ['privatekey_path'])],
)
minimal_cryptography_version = MINIMAL_CRYPTOGRAPHY_VERSION
if module.params['format'] == 'OpenSSH':
minimal_cryptography_version = MINIMAL_CRYPTOGRAPHY_VERSION_OPENSSH
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)
# Decision
if can_use_cryptography:
backend = 'cryptography'
elif can_use_pyopenssl:
if module.params['format'] == 'OpenSSH':
module.fail_json(
msg=missing_required_lib('cryptography >= {0}'.format(MINIMAL_CRYPTOGRAPHY_VERSION_OPENSSH)),
exception=CRYPTOGRAPHY_IMP_ERR
)
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))
if module.params['format'] == 'OpenSSH' and backend != 'cryptography':
module.fail_json(msg="Format OpenSSH requires the cryptography backend.")
if backend == 'pyopenssl':
if not PYOPENSSL_FOUND:
module.fail_json(msg=missing_required_lib('pyOpenSSL >= {0}'.format(MINIMAL_PYOPENSSL_VERSION)),
exception=PYOPENSSL_IMP_ERR)
module.deprecate('The module is using the PyOpenSSL backend. This backend has been deprecated', version='2.13')
elif backend == 'cryptography':
if not CRYPTOGRAPHY_FOUND:
module.fail_json(msg=missing_required_lib('cryptography >= {0}'.format(minimal_cryptography_version)),
exception=CRYPTOGRAPHY_IMP_ERR)
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
)
try:
public_key = PublicKey(module, backend)
if public_key.state == 'present':
if module.check_mode:
result = public_key.dump()
result['changed'] = module.params['force'] or not public_key.check(module)
module.exit_json(**result)
public_key.generate(module)
else:
if module.check_mode:
result = public_key.dump()
result['changed'] = os.path.exists(module.params['path'])
module.exit_json(**result)
public_key.remove(module)
result = public_key.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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