openssl_csr: allow to specify CRL distribution endpoints (#167)

* Improve error messages for name decoding (not all names appear in SANs).

* Refactor DN parsing, add relative DN parsing code.

* Allow to specify CRL distribution points.

* Add changelog fragment.

* Fix typo.

* Make sure value argument to x509.NameAttribute is a text.

* Update changelogs/fragments/167-openssl_csr-crl-distribution-points.yml

Co-authored-by: Andrew Klychkov <aaklychkov@mail.ru>

* Add example.

Co-authored-by: Andrew Klychkov <aaklychkov@mail.ru>

changelogs/fragments/167-openssl_csr-crl-distribution-points.yml

@@ -0,0 +1,2 @@
+minor_changes:
+- "openssl_csr, openssl_csr_pipe - allow to specify CRL distribution endpoints with ``crl_distribution_points`` (https://github.com/ansible-collections/community.crypto/issues/147, https://github.com/ansible-collections/community.crypto/pull/167)."

plugins/doc_fragments/module_csr.py

@@ -260,6 +260,48 @@ options:
             - 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
+    crl_distribution_points:
+        description:
+            - Allows to specify one or multiple CRL distribution points.
+            - Only supported by the C(cryptography) backend.
+        type: list
+        elements: dict
+        suboptions:
+            full_name:
+                description:
+                    - Describes how the CRL can be retrieved.
+                    - Mutually exclusive with I(relative_name).
+                    - "Example: C(URI:https://ca.example.com/revocations.crl)."
+                type: list
+                elements: str
+            relative_name:
+                description:
+                    - Describes how the CRL can be retrieved relative to the CRL issuer.
+                    - Mutually exclusive with I(full_name).
+                    - "Example: C(/CN=example.com)."
+                    - Can only be used when cryptography >= 1.6 is installed.
+                type: list
+                elements: str
+            crl_issuer:
+                description:
+                    - Information about the issuer of the CRL.
+                type: list
+                elements: str
+            reasons:
+                description:
+                    - List of reasons that this distribution point can be used for when performing revocation checks.
+                type: list
+                elements: str
+                choices:
+                    - key_compromise
+                    - ca_compromise
+                    - affiliation_changed
+                    - superseded
+                    - cessation_of_operation
+                    - certificate_hold
+                    - privilege_withdrawn
+                    - aa_compromise
+        version_added: 1.4.0
 notes:
     - If the certificate signing request already exists it will be checked whether subjectAltName,
       keyUsage, extendedKeyUsage and basicConstraints only contain the requested values, whether

plugins/module_utils/crypto/cryptography_support.py

@@ -152,6 +152,36 @@ def _parse_hex(bytesstr):
     return data
 
 
+DN_COMPONENT_START_RE = re.compile(r'^ *([a-zA-z0-9]+) *= *')
+
+
+def _parse_dn_component(name, sep=',', sep_str='\\', decode_remainder=True):
+    m = DN_COMPONENT_START_RE.match(name)
+    if not m:
+        raise OpenSSLObjectError('cannot start part in "{0}"'.format(name))
+    oid = cryptography_name_to_oid(m.group(1))
+    idx = len(m.group(0))
+    decoded_name = []
+    if decode_remainder:
+        length = len(name)
+        while idx < length:
+            i = idx
+            while i < length and name[i] not in sep_str:
+                i += 1
+            if i > idx:
+                decoded_name.append(name[idx:i])
+                idx = i
+            while idx + 1 < length and name[idx] == '\\':
+                decoded_name.append(name[idx + 1])
+                idx += 2
+            if idx < length and name[idx] == sep:
+                break
+    else:
+        decoded_name.append(name[idx:])
+        idx = len(name)
+    return x509.NameAttribute(oid, ''.join(decoded_name)), name[idx:]
+
+
 def _parse_dn(name):
     '''
     Parse a Distinguished Name.
@@ -166,29 +196,12 @@ def _parse_dn(name):
         name = name[1:]
     sep_str = sep + '\\'
     result = []
-    start_re = re.compile(r'^ *([a-zA-z0-9]+) *= *')
     while name:
-        m = start_re.match(name)
-        if not m:
-            raise OpenSSLObjectError('Error while parsing distinguished name "{0}": cannot start part in "{1}"'.format(original_name, name))
-        oid = cryptography_name_to_oid(m.group(1))
-        idx = len(m.group(0))
-        decoded_name = []
-        length = len(name)
-        while idx < length:
-            i = idx
-            while i < length and name[i] not in sep_str:
-                i += 1
-            if i > idx:
-                decoded_name.append(name[idx:i])
-                idx = i
-            while idx + 1 < length and name[idx] == '\\':
-                decoded_name.append(name[idx + 1])
-                idx += 2
-            if idx < length and name[idx] == sep:
-                break
-        result.append(x509.NameAttribute(oid, ''.join(decoded_name)))
-        name = name[idx:]
+        try:
+            attribute, name = _parse_dn_component(name, sep=sep, sep_str=sep_str)
+        except OpenSSLObjectError as e:
+            raise OpenSSLObjectError('Error while parsing distinguished name "{0}": {1}'.format(original_name, e))
+        result.append(attribute)
         if name:
             if name[0] != sep or len(name) < 2:
                 raise OpenSSLObjectError('Error while parsing distinguished name "{0}": unexpected end of string'.format(original_name))
@@ -196,9 +209,19 @@ def _parse_dn(name):
     return result
 
 
-def cryptography_get_name(name):
+def cryptography_parse_relative_distinguished_name(rdn):
+    names = []
+    for part in rdn:
+        try:
+            names.append(_parse_dn_component(to_text(part), decode_remainder=False)[0])
+        except OpenSSLObjectError as e:
+            raise OpenSSLObjectError('Error while parsing relative distinguished name "{0}": {1}'.format(part, e))
+    return cryptography.x509.RelativeDistinguishedName(names)
+
+
+def cryptography_get_name(name, what='Subject Alternative Name'):
     '''
-    Given a name string, returns a cryptography x509.Name object.
+    Given a name string, returns a cryptography x509.GeneralName object.
     Raises an OpenSSLObjectError if the name is unknown or cannot be parsed.
     '''
     try:
@@ -216,7 +239,7 @@ def cryptography_get_name(name):
         if name.startswith('RID:'):
             m = re.match(r'^([0-9]+(?:\.[0-9]+)*)$', to_text(name[4:]))
             if not m:
-                raise OpenSSLObjectError('Cannot parse Subject Alternative Name "{0}"'.format(name))
+                raise OpenSSLObjectError('Cannot parse {what} "{name}"'.format(name=name, what=what))
             return x509.RegisteredID(x509.oid.ObjectIdentifier(m.group(1)))
         if name.startswith('otherName:'):
             # otherName can either be a raw ASN.1 hex string or in the format that OpenSSL works with.
@@ -228,9 +251,9 @@ def cryptography_get_name(name):
             # defailts on the format expected.
             name = to_text(name[10:], errors='surrogate_or_strict')
             if ';' not in name:
-                raise OpenSSLObjectError('Cannot parse Subject Alternative Name otherName "{0}", must be in the '
+                raise OpenSSLObjectError('Cannot parse {what} otherName "{name}", must be in the '
                                          'format "otherName:<OID>;<ASN.1 OpenSSL Encoded String>" or '
-                                         '"otherName:<OID>;<hex string>"'.format(name))
+                                         '"otherName:<OID>;<hex string>"'.format(name=name, what=what))
 
             oid, value = name.split(';', 1)
             b_value = serialize_asn1_string_as_der(value)
@@ -238,10 +261,10 @@ def cryptography_get_name(name):
         if name.startswith('dirName:'):
             return x509.DirectoryName(x509.Name(_parse_dn(to_text(name[8:]))))
     except Exception as e:
-        raise OpenSSLObjectError('Cannot parse Subject Alternative Name "{0}": {1}'.format(name, e))
+        raise OpenSSLObjectError('Cannot parse {what} "{name}": {error}'.format(name=name, what=what, error=e))
     if ':' not in name:
-        raise OpenSSLObjectError('Cannot parse Subject Alternative Name "{0}" (forgot "DNS:" prefix?)'.format(name))
-    raise OpenSSLObjectError('Cannot parse Subject Alternative Name "{0}" (potentially unsupported by cryptography backend)'.format(name))
+        raise OpenSSLObjectError('Cannot parse {what} "{name}" (forgot "DNS:" prefix?)'.format(name=name, what=what))
+    raise OpenSSLObjectError('Cannot parse {what} "{name}" (potentially unsupported by cryptography backend)'.format(name=name, what=what))
 
 
 def _dn_escape_value(value):
@@ -258,7 +281,7 @@ def _dn_escape_value(value):
 
 def cryptography_decode_name(name):
     '''
-    Given a cryptography x509.Name object, returns a string.
+    Given a cryptography x509.GeneralName object, returns a string.
     Raises an OpenSSLObjectError if the name is not supported.
     '''
     if isinstance(name, x509.DNSName):

plugins/module_utils/crypto/module_backends/csr.py

@@ -36,6 +36,11 @@ from ansible_collections.community.crypto.plugins.module_utils.crypto.cryptograp
     cryptography_name_to_oid,
     cryptography_key_needs_digest_for_signing,
     cryptography_parse_key_usage_params,
+    cryptography_parse_relative_distinguished_name,
+)
+
+from ansible_collections.community.crypto.plugins.module_utils.crypto.cryptography_crl import (
+    REVOCATION_REASON_MAP,
 )
 
 from ansible_collections.community.crypto.plugins.module_utils.crypto.pyopenssl_support import (
@@ -128,6 +133,7 @@ class CertificateSigningRequestBackend(object):
         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.crl_distribution_points = module.params['crl_distribution_points']
         self.csr = None
         self.privatekey = None
 
@@ -245,9 +251,10 @@ class CertificateSigningRequestBackend(object):
 # Implementation with using pyOpenSSL
 class CertificateSigningRequestPyOpenSSLBackend(CertificateSigningRequestBackend):
     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'):
+        for o in ('create_subject_key_identifier', ):
+            if module.params[o]:
+                module.fail_json(msg='You cannot use {0} with the pyOpenSSL backend!'.format(o))
+        for o in ('subject_key_identifier', 'authority_key_identifier', 'authority_cert_issuer', 'authority_cert_serial_number', 'crl_distribution_points'):
             if module.params[o] is not None:
                 module.fail_json(msg='You cannot use {0} with the pyOpenSSL backend!'.format(o))
         super(CertificateSigningRequestPyOpenSSLBackend, self).__init__(module, 'pyopenssl')
@@ -409,6 +416,39 @@ class CertificateSigningRequestPyOpenSSLBackend(CertificateSigningRequestBackend
         return _check_subject(self.existing_csr) and _check_extensions(self.existing_csr) and _check_signature(self.existing_csr)
 
 
+def parse_crl_distribution_points(module, crl_distribution_points):
+    result = []
+    for index, parse_crl_distribution_point in enumerate(crl_distribution_points):
+        try:
+            params = dict(
+                full_name=None,
+                relative_name=None,
+                crl_issuer=None,
+                reasons=None,
+            )
+            if parse_crl_distribution_point['full_name'] is not None:
+                params['full_name'] = [cryptography_get_name(name, 'full name') for name in parse_crl_distribution_point['full_name']]
+            if parse_crl_distribution_point['relative_name'] is not None:
+                try:
+                    params['relative_name'] = cryptography_parse_relative_distinguished_name(parse_crl_distribution_point['relative_name'])
+                except Exception:
+                    # If cryptography's version is < 1.6, the error is probably caused by that
+                    if CRYPTOGRAPHY_VERSION < LooseVersion('1.6'):
+                        raise OpenSSLObjectError('Cannot specify relative_name for cryptography < 1.6')
+                    raise
+            if parse_crl_distribution_point['crl_issuer'] is not None:
+                params['crl_issuer'] = [cryptography_get_name(name, 'CRL issuer') for name in parse_crl_distribution_point['crl_issuer']]
+            if parse_crl_distribution_point['reasons'] is not None:
+                reasons = []
+                for reason in parse_crl_distribution_point['reasons']:
+                    reasons.append(REVOCATION_REASON_MAP[reason])
+                params['reasons'] = frozenset(reasons)
+            result.append(cryptography.x509.DistributionPoint(**params))
+        except OpenSSLObjectError as e:
+            raise OpenSSLObjectError('Error while parsing CRL distribution point #{index}: {error}'.format(index=index, error=e))
+    return result
+
+
 # Implementation with using cryptography
 class CertificateSigningRequestCryptographyBackend(CertificateSigningRequestBackend):
     def __init__(self, module):
@@ -417,6 +457,9 @@ class CertificateSigningRequestCryptographyBackend(CertificateSigningRequestBack
         if self.version != 1:
             module.warn('The cryptography backend only supports version 1. (The only valid value according to RFC 2986.)')
 
+        if self.crl_distribution_points:
+            self.crl_distribution_points = parse_crl_distribution_points(module, self.crl_distribution_points)
+
     def generate_csr(self):
         """(Re-)Generate CSR."""
         self._ensure_private_key_loaded()
@@ -460,8 +503,8 @@ class CertificateSigningRequestCryptographyBackend(CertificateSigningRequestBack
         if self.name_constraints_permitted or self.name_constraints_excluded:
             try:
                 csr = csr.add_extension(cryptography.x509.NameConstraints(
-                    [cryptography_get_name(name) for name in self.name_constraints_permitted],
-                    [cryptography_get_name(name) for name in self.name_constraints_excluded],
+                    [cryptography_get_name(name, 'name constraints permitted') for name in self.name_constraints_permitted],
+                    [cryptography_get_name(name, 'name constraints excluded') for name in self.name_constraints_excluded],
                 ), critical=self.name_constraints_critical)
             except TypeError as e:
                 raise OpenSSLObjectError('Error while parsing name constraint: {0}'.format(e))
@@ -477,12 +520,18 @@ class CertificateSigningRequestCryptographyBackend(CertificateSigningRequestBack
         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 = [cryptography_get_name(n) for n in self.authority_cert_issuer]
+                issuers = [cryptography_get_name(n, 'authority cert issuer') 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
             )
 
+        if self.crl_distribution_points:
+            csr = csr.add_extension(
+                cryptography.x509.CRLDistributionPoints(self.crl_distribution_points),
+                critical=False
+            )
+
         digest = None
         if cryptography_key_needs_digest_for_signing(self.privatekey):
             digest = select_message_digest(self.digest)
@@ -606,8 +655,8 @@ class CertificateSigningRequestCryptographyBackend(CertificateSigningRequestBack
             current_nc_ext = _find_extension(extensions, cryptography.x509.NameConstraints)
             current_nc_perm = [str(altname) for altname in current_nc_ext.value.permitted_subtrees] if current_nc_ext else []
             current_nc_excl = [str(altname) for altname in current_nc_ext.value.excluded_subtrees] if current_nc_ext else []
-            nc_perm = [str(cryptography_get_name(altname)) for altname in self.name_constraints_permitted]
-            nc_excl = [str(cryptography_get_name(altname)) for altname in self.name_constraints_excluded]
+            nc_perm = [str(cryptography_get_name(altname, 'name constraints permitted')) for altname in self.name_constraints_permitted]
+            nc_excl = [str(cryptography_get_name(altname, 'name constraints excluded')) for altname in self.name_constraints_excluded]
             if set(nc_perm) != set(current_nc_perm) or set(nc_excl) != set(current_nc_excl):
                 return False
             if nc_perm or nc_excl:
@@ -636,7 +685,7 @@ class CertificateSigningRequestCryptographyBackend(CertificateSigningRequestBack
                 aci = None
                 csr_aci = None
                 if self.authority_cert_issuer is not None:
-                    aci = [str(cryptography_get_name(n)) for n in self.authority_cert_issuer]
+                    aci = [str(cryptography_get_name(n, 'authority cert issuer')) 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
@@ -645,12 +694,21 @@ class CertificateSigningRequestCryptographyBackend(CertificateSigningRequestBack
             else:
                 return ext is None
 
+        def _check_crl_distribution_points(extensions):
+            ext = _find_extension(extensions, cryptography.x509.CRLDistributionPoints)
+            if self.crl_distribution_points is None:
+                return ext is None
+            if not ext:
+                return False
+            return list(ext.value) == self.crl_distribution_points
+
         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) and _check_nameConstraints(extensions))
+                    _check_authority_key_identifier(extensions) and _check_nameConstraints(extensions) and
+                    _check_crl_distribution_points(extensions))
 
         def _check_signature(csr):
             if not csr.is_signature_valid:
@@ -750,6 +808,26 @@ def get_csr_argument_spec():
             authority_key_identifier=dict(type='str'),
             authority_cert_issuer=dict(type='list', elements='str'),
             authority_cert_serial_number=dict(type='int'),
+            crl_distribution_points=dict(
+                type='list',
+                elements='dict',
+                options=dict(
+                    full_name=dict(type='list', elements='str'),
+                    relative_name=dict(type='list', elements='str'),
+                    crl_issuer=dict(type='list', elements='str'),
+                    reasons=dict(type='list', elements='str', choices=[
+                        'key_compromise',
+                        'ca_compromise',
+                        'affiliation_changed',
+                        'superseded',
+                        'cessation_of_operation',
+                        'certificate_hold',
+                        'privilege_withdrawn',
+                        'aa_compromise',
+                    ]),
+                ),
+                mutually_exclusive=[('full_name', 'relative_name')]
+            ),
             select_crypto_backend=dict(type='str', default='auto', choices=['auto', 'cryptography', 'pyopenssl']),
         ),
         required_together=[

plugins/modules/openssl_csr.py

@@ -142,6 +142,21 @@ EXAMPLES = r'''
     extended_key_usage:
     - clientAuth
     subject_alt_name: otherName:1.3.6.1.4.1.311.20.2.3;UTF8:username@localhost
+
+- name: Generate an OpenSSL Certificate Signing Request with a CRL distribution point
+  community.crypto.openssl_csr:
+    path: /etc/ssl/csr/www.ansible.com.csr
+    privatekey_path: /etc/ssl/private/ansible.com.pem
+    common_name: www.ansible.com
+    crl_distribution_points:
+      - full_name:
+          - "URI:https://ca.example.com/revocations.crl"
+        crl_issuer:
+          - "URI:https://ca.example.com/"
+        reasons:
+          - key_compromise
+          - ca_compromise
+          - cessation_of_operation
 '''
 
 RETURN = r'''

plugins/modules/x509_crl.py

@@ -502,7 +502,7 @@ class CRL(OpenSSLObject):
                 result['serial_number'] = rc['serial_number']
             # All other options
             if rc['issuer']:
-                result['issuer'] = [cryptography_get_name(issuer) for issuer in rc['issuer']]
+                result['issuer'] = [cryptography_get_name(issuer, 'issuer') for issuer in rc['issuer']]
                 result['issuer_critical'] = rc['issuer_critical']
             result['revocation_date'] = get_relative_time_option(
                 rc['revocation_date'],
@@ -648,7 +648,7 @@ class CRL(OpenSSLObject):
             if entry['issuer'] is not None:
                 revoked_cert = revoked_cert.add_extension(
                     x509.CertificateIssuer([
-                        cryptography_get_name(name) for name in entry['issuer']
+                        cryptography_get_name(name, 'issuer') for name in entry['issuer']
                     ]),
                     entry['issuer_critical']
                 )

tests/integration/targets/openssl_csr/tasks/impl.yml

@@ -902,3 +902,96 @@
           ignore_errors: yes
 
   when: select_crypto_backend == 'cryptography' and cryptography_version.stdout is version('2.6', '>=')
+
+- name: "({{ select_crypto_backend }}) CRL distribution endpoints (for cryptography >= 1.6)"
+  block:
+    - name: "({{ select_crypto_backend }}) Create CSR with CRL distribution endpoints"
+      openssl_csr:
+        path: '{{ output_dir }}/csr_crl_d_e.csr'
+        privatekey_path: '{{ output_dir }}/privatekey.pem'
+        subject:
+          commonName: www.ansible.com
+        crl_distribution_points:
+          - full_name:
+              - "URI:https://ca.example.com/revocations.crl"
+            crl_issuer:
+              - "URI:https://ca.example.com/"
+            reasons:
+              - key_compromise
+              - ca_compromise
+              - cessation_of_operation
+          - relative_name:
+              - CN=ca.example.com
+            reasons:
+              - certificate_hold
+          - {}
+        select_crypto_backend: '{{ select_crypto_backend }}'
+      register: crl_distribution_endpoints_1
+
+    - name: "({{ select_crypto_backend }}) Create CSR with CRL distribution endpoints (idempotence)"
+      openssl_csr:
+        path: '{{ output_dir }}/csr_crl_d_e.csr'
+        privatekey_path: '{{ output_dir }}/privatekey.pem'
+        subject:
+          commonName: www.ansible.com
+        crl_distribution_points:
+          - full_name:
+              - "URI:https://ca.example.com/revocations.crl"
+            crl_issuer:
+              - "URI:https://ca.example.com/"
+            reasons:
+              - key_compromise
+              - ca_compromise
+              - cessation_of_operation
+          - relative_name:
+              - CN=ca.example.com
+            reasons:
+              - certificate_hold
+          - {}
+        select_crypto_backend: '{{ select_crypto_backend }}'
+      register: crl_distribution_endpoints_2
+
+    - name: "({{ select_crypto_backend }}) Create CSR with CRL distribution endpoints (change)"
+      openssl_csr:
+        path: '{{ output_dir }}/csr_crl_d_e.csr'
+        privatekey_path: '{{ output_dir }}/privatekey.pem'
+        subject:
+          commonName: www.ansible.com
+        crl_distribution_points:
+          - full_name:
+              - "URI:https://ca.example.com/revocations.crl"
+            crl_issuer:
+              - "URI:https://ca.example.com/"
+            reasons:
+              - key_compromise
+              - ca_compromise
+              - cessation_of_operation
+          - relative_name:
+              - CN=ca.example.com
+            reasons:
+              - certificate_hold
+        select_crypto_backend: '{{ select_crypto_backend }}'
+      register: crl_distribution_endpoints_3
+
+    - name: "({{ select_crypto_backend }}) Create CSR with CRL distribution endpoints (no endpoints)"
+      openssl_csr:
+        path: '{{ output_dir }}/csr_crl_d_e.csr'
+        privatekey_path: '{{ output_dir }}/privatekey.pem'
+        subject:
+          commonName: www.ansible.com
+        select_crypto_backend: '{{ select_crypto_backend }}'
+      register: crl_distribution_endpoints_4
+
+    - name: "({{ select_crypto_backend }}) Create CSR with CRL distribution endpoints"
+      openssl_csr:
+        path: '{{ output_dir }}/csr_crl_d_e.csr'
+        privatekey_path: '{{ output_dir }}/privatekey.pem'
+        subject:
+          commonName: www.ansible.com
+        crl_distribution_points:
+          - full_name:
+              - "URI:https://ca.example.com/revocations.crl"
+        select_crypto_backend: '{{ select_crypto_backend }}'
+      register: crl_distribution_endpoints_5
+
+  when: select_crypto_backend == 'cryptography' and cryptography_version.stdout is version('1.6', '>=')

tests/integration/targets/openssl_csr/tests/validate.yml

@@ -334,3 +334,13 @@
       - generate_csr_ed25519_ed448_idempotent.results[0] is not changed
       - generate_csr_ed25519_ed448_idempotent.results[1] is not changed
   when: select_crypto_backend == 'cryptography' and cryptography_version.stdout is version('2.8', '>=') and generate_csr_ed25519_ed448_privatekey is not failed
+
+- name: "({{ select_crypto_backend }}) Verify CRL distribution endpoints (for cryptography >= 1.6)"
+  assert:
+    that:
+      - crl_distribution_endpoints_1 is changed
+      - crl_distribution_endpoints_2 is not changed
+      - crl_distribution_endpoints_3 is changed
+      - crl_distribution_endpoints_4 is changed
+      - crl_distribution_endpoints_5 is changed
+  when: select_crypto_backend == 'cryptography' and cryptography_version.stdout is version('1.6', '>=')