Introduce action to increase dovecot DH parameters size

Originally required by centos2alma since we upgrade
rouncube during the converion process

pleskdistup/actions/__init__.py

@@ -3,6 +3,7 @@
 from .common_checks import *
 from .common import *
 from .distupgrade import *
+from .emails import *
 from .extensions import *
 from .mariadb import *
 from .packages import *

pleskdistup/actions/emails.py

@@ -0,0 +1,54 @@
+# Copyright 2023-2024. WebPros International GmbH. All rights reserved.
+import json
+import subprocess
+
+from pleskdistup.common import action, log, util
+
+
+class SetMinDovecotDhParamSize(action.ActiveAction):
+    dhparam_size: int
+
+    def __init__(self, dhparam_size: int):
+        self.name = "increase Dovecot DH parameters size to 2048 bits"
+        self.dhparam_size = dhparam_size
+
+    def _is_required(self) -> bool:
+        proc = subprocess.run(
+            ["/usr/sbin/plesk", "sbin", "sslmng", "--show-config"],
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+            universal_newlines=True,
+        )
+        if proc.returncode != 0:
+            log.warn(f"Failed to get ssl configuration by plesk sslmng: {proc.stdout}\n{proc.stderr}")
+            return False
+
+        try:
+            sslmng_config = json.loads(proc.stdout)
+            if int(sslmng_config["effective"]["dovecot"]["dhparams_size"]) >= self.dhparam_size:
+                return False
+        except json.JSONDecodeError:
+            log.warn(f"Failed to parse plesk sslmng results: {proc.stdout}")
+            return False
+
+        return True
+
+    def _prepare_action(self) -> action.ActionResult:
+        return action.ActionResult()
+
+    def _post_action(self) -> action.ActionResult:
+        util.logged_check_call(
+            [
+                "/usr/sbin/plesk", "sbin", "sslmng",
+                "--service", "dovecot",
+                "--strong-dh",
+                f"--dhparams-size={self.dhparam_size}",
+            ]
+        )
+        return action.ActionResult()
+
+    def _revert_action(self) -> action.ActionResult:
+        return action.ActionResult()
+
+    def estimate_post_time(self) -> int:
+        return 5