1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
|
#!/usr/bin/python
# -*- coding: utf-8 -*-
#
# (c) 2017, Yanis Guenane <yanis+ansible@guenane.org>
# 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': '1.0',
'status': ['preview'],
'supported_by': 'community'}
DOCUMENTATION = '''
---
module: openssl_csr
author: "Yanis Guenane (@Spredzy)"
version_added: "2.4"
short_description: Generate OpenSSL Certificate Signing Request (CSR)
description:
- "This module allows one to (re)generates OpenSSL certificate signing requests.
It uses the pyOpenSSL python library to interact with openssl. This module supports
the subjectAltName as well as the keyUsage and extendedKeyUsage extensions.
Note: At least one of commonName or subjectAltName must be specified.
This module uses file common arguments to specify generated file permissions."
requirements:
- "python-pyOpenSSL"
options:
state:
required: false
default: "present"
choices: [ present, absent ]
description:
- Whether the certificate signing request should exist or not, taking action if the state is different from what is stated.
digest:
required: false
default: "sha256"
description:
- Digest used when signing the certificate signing request with the private key
privatekey_path:
required: true
description:
- Path to the privatekey to use when signing the certificate signing request
privatekey_passphrase:
required: false
description:
- The passphrase for the privatekey.
version_added: "2.4"
version:
required: false
default: 3
description:
- Version of the certificate signing request
force:
required: false
default: False
choices: [ True, False ]
description:
- Should the certificate signing request be forced regenerated by this ansible module
path:
required: true
description:
- Name of the folder in which the generated OpenSSL certificate signing request will be written
countryName:
required: false
aliases: [ 'C' ]
description:
- countryName field of the certificate signing request subject
stateOrProvinceName:
required: false
aliases: [ 'ST' ]
description:
- stateOrProvinceName field of the certificate signing request subject
localityName:
required: false
aliases: [ 'L' ]
description:
- localityName field of the certificate signing request subject
organizationName:
required: false
aliases: [ 'O' ]
description:
- organizationName field of the certificate signing request subject
organizationalUnitName:
required: false
aliases: [ 'OU' ]
description:
- organizationalUnitName field of the certificate signing request subject
commonName:
required: false
aliases: [ 'CN' ]
description:
- commonName field of the certificate signing request subject
emailAddress:
required: false
aliases: [ 'E' ]
description:
- emailAddress field of the certificate signing request subject
subjectAltName:
required: false
description:
- SAN extension to attach to the certificate signing request
- This can either be a 'comma separated string' or a YAML list.
subjectAltName_critical:
required: false
description:
- Should the subjectAltName extension be considered as critical
keyUsage:
required: false
description:
- This defines the purpose (e.g. encipherment, signature, certificate signing)
of the key contained in the certificate.
- This can either be a 'comma separated string' or a YAML list.
keyUsage_critical:
required: false
description:
- Should the keyUsage extension be considered as critical
extendedKeyUsage:
required: false
aliases: [ 'extKeyUsage' ]
description:
- Additional restrictions (e.g. client authentication, server authentication)
on the allowed purposes for which the public key may be used.
- This can either be a 'comma separated string' or a YAML list.
extendedKeyUsage_critical:
required: false
aliases: [ 'extKeyUsage_critical' ]
description:
- Should the extkeyUsage extension be considered as critical
notes:
- "If the certificate signing request already exists it will be checked whether subjectAltName,
keyUsage and extendedKeyUsage only contain the requested values and if the request was signed
by the given private key"
'''
EXAMPLES = '''
# Generate an OpenSSL Certificate Signing Request
- openssl_csr:
path: /etc/ssl/csr/www.ansible.com.csr
privatekey_path: /etc/ssl/private/ansible.com.pem
commonName: www.ansible.com
# 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
commonName: www.ansible.com
# 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
countryName: FR
organizationName: Ansible
emailAddress: jdoe@ansible.com
commonName: www.ansible.com
# 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
subjectAltName: 'DNS:www.ansible.com,DNS:m.ansible.com'
# Force re-generate an OpenSSL Certificate Signing Request
- openssl_csr:
path: /etc/ssl/csr/www.ansible.com.csr
privatekey_path: /etc/ssl/private/ansible.com.pem
force: True
commonName: www.ansible.com
# 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
commonName: www.ansible.com
keyUsage:
- digitlaSignature
- keyAgreement
extKeyUsage:
- clientAuth
'''
RETURN = '''
privatekey:
description: Path to the TLS/SSL private key the CSR was generated for
returned: changed or success
type: string
sample: /etc/ssl/private/ansible.com.pem
filename:
description: Path to the generated Certificate Signing Request
returned: changed or success
type: string
sample: /etc/ssl/csr/www.ansible.com.csr
subject:
description: A dictionnary of the subject attached to the CSR
returned: changed or success
type: list
sample: {'CN': 'www.ansible.com', 'O': 'Ansible'}
subjectAltName:
description: The alternative names this CSR is valid for
returned: changed or success
type: list
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
sample: [ 'digitalSignature', 'keyAgreement' ]
extendedKeyUsage:
description: Additional restriction on the public key purposes
returned: changed or success
type: list
sample: [ 'clientAuth' ]
'''
import os
from ansible.module_utils import crypto as crypto_utils
from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils._text import to_native
try:
from OpenSSL import crypto
except ImportError:
pyopenssl_found = False
else:
pyopenssl_found = True
class CertificateSigningRequestError(crypto_utils.OpenSSLObjectError):
pass
class CertificateSigningRequest(crypto_utils.OpenSSLObject):
def __init__(self, module):
super(CertificateSigningRequest, 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['subjectAltName']
self.subjectAltName_critical = module.params['subjectAltName_critical']
self.keyUsage = module.params['keyUsage']
self.keyUsage_critical = module.params['keyUsage_critical']
self.extendedKeyUsage = module.params['extendedKeyUsage']
self.extendedKeyUsage_critical = module.params['extendedKeyUsage_critical']
self.request = None
self.privatekey = None
self.subject = {
'C': module.params['countryName'],
'ST': module.params['stateOrProvinceName'],
'L': module.params['localityName'],
'O': module.params['organizationName'],
'OU': module.params['organizationalUnitName'],
'CN': module.params['commonName'],
'emailAddress': module.params['emailAddress'],
}
if not self.subjectAltName:
self.subjectAltName = ['DNS:%s' % self.subject['CN']]
self.subject = dict((k, v) for k, v in self.subject.items() if v)
def generate(self, module):
'''Generate the certificate signing request.'''
if not self.check(module, perms_required=False) or self.force:
req = crypto.X509Req()
req.set_version(self.version)
subject = req.get_subject()
for (key, value) in self.subject.items():
if value is not None:
setattr(subject, key, value)
altnames = ', '.join(self.subjectAltName)
extensions = [crypto.X509Extension(b"subjectAltName", self.subjectAltName_critical, altnames.encode('ascii'))]
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')))
req.add_extensions(extensions)
req.set_pubkey(self.privatekey)
req.sign(self.privatekey, self.digest)
self.request = req
try:
csr_file = open(self.path, 'wb')
csr_file.write(crypto.dump_certificate_request(crypto.FILETYPE_PEM, self.request))
csr_file.close()
except (IOError, OSError) as exc:
raise CertificateSigningRequestError(exc)
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
def check(self, module, perms_required=True):
"""Ensure the resource is in its desired state."""
state_and_perms = super(CertificateSigningRequest, self).check(module, perms_required)
self.privatekey = crypto_utils.load_privatekey(self.privatekey_path, self.privatekey_passphrase)
def _check_subject(csr):
subject = csr.get_subject()
for (key, value) in self.subject.items():
if getattr(subject, key, None) != value:
return False
return True
def _check_subjectAltName(extensions):
altnames_ext = next((ext for ext in extensions if ext.get_short_name() == b'subjectAltName'), '')
altnames = [altname.strip() for altname in str(altnames_ext).split(',')]
# apperently 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)
altnames = [name if not name.startswith('IP Address:') else "IP:" + name.split(':', 1)[1] for name in altnames]
if self.subjectAltName:
if set(altnames) != set(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, long):
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 = [usage.strip() for usage in str(usages_ext[0]).split(',')]
expected = [long[usage] if usage in long else usage for usage in expected]
return current == expected and usages_ext[0].get_critical() == critical
def _check_keyUsage(extensions):
return _check_keyUsage_(extensions, b'keyUsage', self.keyUsage, self.keyUsage_critical, crypto_utils.keyUsageLong)
def _check_extenededKeyUsage(extensions):
return _check_keyUsage_(extensions, b'extendedKeyUsage', self.extendedKeyUsage, self.extendedKeyUsage_critical, crypto_utils.extendedKeyUsageLong)
def _check_extensions(csr):
extensions = csr.get_extensions()
return _check_subjectAltName(extensions) and _check_keyUsage(extensions) and _check_extenededKeyUsage(extensions)
def _check_signature(csr):
try:
return csr.verify(self.privatekey)
except crypto.Error:
return False
if not state_and_perms:
return False
csr = crypto_utils.load_certificate_request(self.path)
return _check_subject(csr) and _check_extensions(csr) and _check_signature(csr)
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,
'changed': self.changed
}
return result
def main():
module = AnsibleModule(
argument_spec=dict(
state=dict(default='present', choices=['present', 'absent'], type='str'),
digest=dict(default='sha256', type='str'),
privatekey_path=dict(require=True, type='path'),
privatekey_passphrase=dict(type='str', no_log=True),
version=dict(default='3', type='int'),
force=dict(default=False, type='bool'),
path=dict(required=True, type='path'),
countryName=dict(aliases=['C'], type='str'),
stateOrProvinceName=dict(aliases=['ST'], type='str'),
localityName=dict(aliases=['L'], type='str'),
organizationName=dict(aliases=['O'], type='str'),
organizationalUnitName=dict(aliases=['OU'], type='str'),
commonName=dict(aliases=['CN'], type='str'),
emailAddress=dict(aliases=['E'], type='str'),
subjectAltName=dict(type='list'),
subjectAltName_critical=dict(default=False, type='bool'),
keyUsage=dict(type='list'),
keyUsage_critical=dict(default=False, type='bool'),
extendedKeyUsage=dict(aliases=['extKeyUsage'], type='list'),
extendedKeyUsage_critical=dict(default=False, aliases=['extKeyUsage_critical'], type='bool'),
),
add_file_common_args=True,
supports_check_mode=True,
required_one_of=[['commonName', 'subjectAltName']],
)
if not pyopenssl_found:
module.fail_json(msg='the python pyOpenSSL module is required')
base_dir = os.path.dirname(module.params['path'])
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)
csr = CertificateSigningRequest(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)
try:
csr.generate(module)
except (CertificateSigningRequestError, crypto_utils.OpenSSLObjectError) as exc:
module.fail_json(msg=to_native(exc))
else:
if module.check_mode:
result = csr.dump()
result['changed'] = os.path.exists(module.params['path'])
module.exit_json(**result)
try:
csr.remove()
except (CertificateSigningRequestError, crypto_utils.OpenSSLObjectError) as exc:
module.fail_json(msg=to_native(exc))
result = csr.dump()
module.exit_json(**result)
if __name__ == "__main__":
main()
|