configverify: T6198: add common helper for PKI certificate validation

The next evolutional step after adding get_config_dict(..., with_pki=True) is
to add a common verification function for the recurring task of validating SSL
certificate existance in e.g. EAPoL, OpenConnect, SSTP or HTTPS.

(cherry picked from commit 3b758d870449e92fece9e29c791b950b332e6e65)

1 files changed, 17 insertions, 35 deletions

diff --git a/src/conf_mode/vpn_openconnect.py b/src/conf_mode/vpn_openconnect.py
index 08e4fc6db..8159fedea 100755
--- a/src/conf_mode/vpn_openconnect.py
+++ b/src/conf_mode/vpn_openconnect.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 #
-# Copyright (C) 2018-2023 VyOS maintainers and contributors
+# Copyright (C) 2018-2024 VyOS maintainers and contributors
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 or later as
@@ -19,6 +19,8 @@ from sys import exit
 
 from vyos.base import Warning
 from vyos.config import Config
+from vyos.configverify import verify_pki_certificate
+from vyos.configverify import verify_pki_ca_certificate
 from vyos.pki import wrap_certificate
 from vyos.pki import wrap_private_key
 from vyos.template import render
@@ -75,7 +77,7 @@ def verify(ocserv):
     if "accounting" in ocserv:
         if "mode" in ocserv["accounting"] and "radius" in ocserv["accounting"]["mode"]:
             if not origin["accounting"]['radius']['server']:
-                raise ConfigError('Openconnect accounting mode radius requires at least one RADIUS server')
+                raise ConfigError('OpenConnect accounting mode radius requires at least one RADIUS server')
             if "authentication" not in ocserv or "mode" not in ocserv["authentication"]:
                 raise ConfigError('Accounting depends on OpenConnect authentication configuration')
             elif "radius" not in ocserv["authentication"]["mode"]:
@@ -89,12 +91,12 @@ def verify(ocserv):
                     raise ConfigError('OpenConnect authentication modes are mutually-exclusive, remove either local or radius from your configuration')
             if "radius" in ocserv["authentication"]["mode"]:
                 if not ocserv["authentication"]['radius']['server']:
-                    raise ConfigError('Openconnect authentication mode radius requires at least one RADIUS server')
+                    raise ConfigError('OpenConnect authentication mode radius requires at least one RADIUS server')
             if "local" in ocserv["authentication"]["mode"]:
                 if not ocserv.get("authentication", {}).get("local_users"):
-                    raise ConfigError('openconnect mode local required at least one user')
+                    raise ConfigError('OpenConnect mode local required at least one user')
                 if not ocserv["authentication"]["local_users"]["username"]:
-                    raise ConfigError('openconnect mode local required at least one user')
+                    raise ConfigError('OpenConnect mode local required at least one user')
                 else:
                     # For OTP mode: verify that each local user has an OTP key
                     if "otp" in ocserv["authentication"]["mode"]["local"]:
@@ -127,40 +129,20 @@ def verify(ocserv):
                     if 'default_config' not in ocserv["authentication"]["identity_based_config"]:
                         raise ConfigError('OpenConnect identity-based-config enabled but default-config not set')
         else:
-            raise ConfigError('openconnect authentication mode required')
+            raise ConfigError('OpenConnect authentication mode required')
     else:
-        raise ConfigError('openconnect authentication credentials required')
+        raise ConfigError('OpenConnect authentication credentials required')
 
     # Check ssl
     if 'ssl' not in ocserv:
-        raise ConfigError('openconnect ssl required')
+        raise ConfigError('SSL missing on OpenConnect config!')
 
-    if not ocserv['pki'] or 'certificate' not in ocserv['pki']:
-        raise ConfigError('PKI not configured')
+    if 'certificate' not in ocserv['ssl']:
+        raise ConfigError('SSL certificate missing on OpenConnect config!')
+    verify_pki_certificate(ocserv, ocserv['ssl']['certificate'])
 
-    ssl = ocserv['ssl']
-    if 'certificate' not in ssl:
-        raise ConfigError('openconnect ssl certificate required')
-
-    cert_name = ssl['certificate']
-
-    if cert_name not in ocserv['pki']['certificate']:
-        raise ConfigError('Invalid openconnect ssl certificate')
-
-    cert = ocserv['pki']['certificate'][cert_name]
-
-    if 'certificate' not in cert:
-        raise ConfigError('Missing certificate in PKI')
-
-    if 'private' not in cert or 'key' not in cert['private']:
-        raise ConfigError('Missing private key in PKI')
-
-    if 'ca_certificate' in ssl:
-        if 'ca' not in ocserv['pki']:
-            raise ConfigError('PKI not configured')
-
-        if ssl['ca_certificate'] not in ocserv['pki']['ca']:
-            raise ConfigError('Invalid openconnect ssl CA certificate')
+    if 'ca_certificate' in ocserv['ssl']:
+        verify_pki_ca_certificate(ocserv, ocserv['ssl']['ca_certificate'])
 
     # Check network settings
     if "network_settings" in ocserv:
@@ -172,7 +154,7 @@ def verify(ocserv):
         else:
             ocserv["network_settings"]["push_route"] = ["default"]
     else:
-        raise ConfigError('openconnect network settings required')
+        raise ConfigError('OpenConnect network settings required!')
 
 def generate(ocserv):
     if not ocserv:
@@ -276,7 +258,7 @@ def apply(ocserv):
                 break
             sleep(0.250)
             if counter > 5:
-                raise ConfigError('openconnect failed to start, check the logs for details')
+                raise ConfigError('OpenConnect failed to start, check the logs for details')
                 break
             counter += 1