Merge pull request #3619 from vyos/mergify/bp/sagitta/pr-3610

op-mode: T6424: ipsec: honor certificate CN and CA chain during profile generation (backport #3610)

3 files changed, 41 insertions, 26 deletions

diff --git a/data/templates/ipsec/ios_profile.j2 b/data/templates/ipsec/ios_profile.j2
index a9ae1c7a9..935acbf8e 100644
--- a/data/templates/ipsec/ios_profile.j2
+++ b/data/templates/ipsec/ios_profile.j2
@@ -48,10 +48,10 @@
                 <!-- Optional, if it matches the CN of the root CA certificate (not the full subject DN) a certificate request will be sent
                      NOTE: If this is not configured make sure to configure leftsendcert=always on the server, otherwise it won't send its certificate -->
                 <key>ServerCertificateIssuerCommonName</key>
-                <string>{{ ca_cn }}</string>
+                <string>{{ ca_common_name }}</string>
                 <!-- Optional, the CN or one of the subjectAltNames of the server certificate to verify it, if not set RemoteIdentifier will be used -->
                 <key>ServerCertificateCommonName</key>
-                <string>{{ cert_cn }}</string>
+                <string>{{ cert_common_name }}</string>
                 <!-- The server is authenticated using a certificate -->
                 <key>AuthenticationMethod</key>
                 <string>Certificate</string>
@@ -83,24 +83,22 @@
                 </dict>
             </dict>
         </dict>
-{% if certs is vyos_defined %}
+{% if ca_certificates is vyos_defined %}
         <!-- This payload is optional but it provides an easy way to install the CA certificate together with the configuration -->
-{%     for cert in certs %}
-        <!-- Payload for: {{ cert.ca_cn }} -->
+{%     for ca in ca_certificates %}
+        <!-- Payload for: {{ ca.ca_name }} -->
         <dict>
             <key>PayloadIdentifier</key>
-            <string>org.{{ cert.ca_cn | lower | replace(' ', '.') | replace('_', '.') }}</string>
+            <string>org.{{ ca.ca_name | lower | replace(' ', '.') | replace('_', '.') }}</string>
             <key>PayloadUUID</key>
-            <string>{{ cert.ca_cn | generate_uuid4 }}</string>
+            <string>{{ ca.ca_name | get_uuid }}</string>
             <key>PayloadType</key>
             <string>com.apple.security.root</string>
             <key>PayloadVersion</key>
             <integer>1</integer>
             <!-- This is the Base64 (PEM) encoded CA certificate -->
             <key>PayloadContent</key>
-            <data>
-            {{ cert.ca_cert }}
-            </data>
+            <data>{{ ca.ca_chain }}</data>
         </dict>
 {%     endfor %}
 {% endif %}
diff --git a/python/vyos/template.py b/python/vyos/template.py
index cdcbdc6c3..a4fff649c 100644
--- a/python/vyos/template.py
+++ b/python/vyos/template.py
@@ -523,10 +523,17 @@ def get_esp_ike_cipher(group_config, ike_group=None):
     return ciphers
 
 @register_filter('get_uuid')
-def get_uuid(interface):
+def get_uuid(seed):
     """ Get interface IP addresses"""
-    from uuid import uuid1
-    return uuid1()
+    if seed:
+        from hashlib import md5
+        from uuid import UUID
+        tmp = md5()
+        tmp.update(seed.encode('utf-8'))
+        return str(UUID(tmp.hexdigest()))
+    else:
+        from uuid import uuid1
+        return uuid1()
 
 openvpn_translate = {
     'des': 'des-cbc',
diff --git a/src/op_mode/ikev2_profile_generator.py b/src/op_mode/ikev2_profile_generator.py
index 4ac4fb14a..169a15840 100755
--- a/src/op_mode/ikev2_profile_generator.py
+++ b/src/op_mode/ikev2_profile_generator.py
@@ -21,6 +21,10 @@ from socket import getfqdn
 from cryptography.x509.oid import NameOID
 
 from vyos.configquery import ConfigTreeQuery
+from vyos.pki import CERT_BEGIN
+from vyos.pki import CERT_END
+from vyos.pki import find_chain
+from vyos.pki import encode_certificate
 from vyos.pki import load_certificate
 from vyos.template import render_to_string
 from vyos.utils.io import ask_input
@@ -146,27 +150,33 @@ data['rfqdn'] = '.'.join(tmp)
 pki = conf.get_config_dict(pki_base, get_first_key=True)
 cert_name = data['authentication']['x509']['certificate']
 
-data['certs'] = []
+cert_data = load_certificate(pki['certificate'][cert_name]['certificate'])
+data['cert_common_name'] = cert_data.subject.get_attributes_for_oid(NameOID.COMMON_NAME)[0].value
+data['ca_common_name'] = cert_data.issuer.get_attributes_for_oid(NameOID.COMMON_NAME)[0].value
+data['ca_certificates'] = []
 
-for ca_name in data['authentication']['x509']['ca_certificate']:
-    tmp = {}
-    ca_cert = load_certificate(pki['ca'][ca_name]['certificate'])
-    cert = load_certificate(pki['certificate'][cert_name]['certificate'])
-
-
-    tmp['ca_cn'] = ca_cert.subject.get_attributes_for_oid(NameOID.COMMON_NAME)[0].value
-    tmp['cert_cn'] = cert.subject.get_attributes_for_oid(NameOID.COMMON_NAME)[0].value
-    tmp['ca_cert'] = conf.value(pki_base + ['ca', ca_name, 'certificate'])
-
-    data['certs'].append(tmp)
+loaded_ca_certs = {load_certificate(c['certificate'])
+    for c in pki['ca'].values()} if 'ca' in pki else {}
 
+for ca_name in data['authentication']['x509']['ca_certificate']:
+    loaded_ca_cert = load_certificate(pki['ca'][ca_name]['certificate'])
+    ca_full_chain = find_chain(loaded_ca_cert, loaded_ca_certs)
+    for ca in ca_full_chain:
+        tmp = {
+            'ca_name' : ca.subject.get_attributes_for_oid(NameOID.COMMON_NAME)[0].value,
+            'ca_chain' : encode_certificate(ca).replace(CERT_BEGIN, '').replace(CERT_END, '').replace('\n', ''),
+        }
+        data['ca_certificates'].append(tmp)
+
+# Remove duplicate list entries for CA certificates, as they are added by their common name
+# https://stackoverflow.com/a/9427216
+data['ca_certificates'] = [dict(t) for t in {tuple(d.items()) for d in data['ca_certificates']}]
 
 esp_proposals = conf.get_config_dict(ipsec_base + ['esp-group', data['esp_group'], 'proposal'],
                                      key_mangling=('-', '_'), get_first_key=True)
 ike_proposal = conf.get_config_dict(ipsec_base + ['ike-group', data['ike_group'], 'proposal'],
                                     key_mangling=('-', '_'), get_first_key=True)
 
-
 # This script works only for Apple iOS/iPadOS and Windows. Both operating systems
 # have different limitations thus we load the limitations based on the operating
 # system used.