#!/usr/bin/python # -*- coding: utf-8 -*- # Copyrigt: (c) 2017, Yanis Guenane # 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. - 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 private key to use when signing the certificate signing request. - Either I(privatekey_path) or I(privatekey_content) must be specified if I(state) is C(present), but not both. type: str version_added: "2.10" 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." - This option will no longer accept unsupported values from Ansible 2.14 on. 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" return_content: description: - If set to C(yes), will return the (current or generated) CSR's content as I(csr). type: bool default: no version_added: "2.10" 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 an inline key openssl_csr: path: /etc/ssl/csr/www.ansible.com.csr privatekey_content: "{{ private_key_content }}" 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: jdoe@ansible.com 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 - Will be C(none) if the private key has been provided in I(privatekey_content). 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~ csr: description: The (current or generated) CSR's content. returned: if I(state) is C(present) and I(return_content) is C(yes) type: str version_added: "2.10" ''' 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_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.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 self.csr_bytes = None self.return_content = module.params['return_content'] 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) if self.return_content: self.csr_bytes = result 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 if self.return_content: if self.csr_bytes is None: self.csr_bytes = crypto_utils.load_file_if_exists(self.path, ignore_errors=True) result['csr'] = self.csr_bytes.decode('utf-8') if self.csr_bytes else None 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( path=self.privatekey_path, content=self.privatekey_content, passphrase=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: if self.privatekey_content is not None: content = self.privatekey_content else: with open(self.privatekey_path, 'rb') as f: content = f.read() self.privatekey = cryptography.hazmat.primitives.serialization.load_pem_private_key( content, 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: if bc_ext.critical != self.basicConstraints_critical: return False return True 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_content=dict(type='str'), 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']), return_content=dict(type='bool', default=False), ), required_together=[('authority_cert_issuer', 'authority_cert_serial_number')], required_if=[('state', 'present', ['privatekey_path', 'privatekey_content'], True)], mutually_exclusive=( ['privatekey_path', 'privatekey_content'], ), add_file_common_args=True, supports_check_mode=True, ) if module.params['version'] != 1: module.deprecate('The version option will only support allowed values from Ansible 2.14 on. ' 'Currently, only the value 1 is allowed by RFC 2986', version='2.14') 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()