From 60bde7d382f11da942ec4f0ba03f66196eafd0ae Mon Sep 17 00:00:00 2001
From: Isidro Arias <isidro.arias@wslw.es>
Date: Tue, 14 Nov 2023 17:16:16 +0100
Subject: [PATCH] GeneralDedCiphering

---
 dlms_cosem/connection.py                        |  1 +
 dlms_cosem/protocol/xdlms/__init__.py           |  1 +
 dlms_cosem/protocol/xdlms/general_ded_cipher.py | 12 ++++++++++++
 3 files changed, 14 insertions(+)
 create mode 100644 dlms_cosem/protocol/xdlms/general_ded_cipher.py

diff --git a/dlms_cosem/connection.py b/dlms_cosem/connection.py
index f230544..207a1b2 100644
--- a/dlms_cosem/connection.py
+++ b/dlms_cosem/connection.py
@@ -36,6 +36,7 @@ class XDlmsApduFactory:
         40: xdlms.GlobalCipherInitiateResponse,
         216: xdlms.ExceptionResponse,
         219: xdlms.GeneralGlobalCipher,
+        220: xdlms.GeneralDedCipher,
         # ACSE APDUs:
         96: acse.ApplicationAssociationRequest,
         97: acse.ApplicationAssociationResponse,
diff --git a/dlms_cosem/protocol/xdlms/__init__.py b/dlms_cosem/protocol/xdlms/__init__.py
index ff759e1..b8ed85d 100644
--- a/dlms_cosem/protocol/xdlms/__init__.py
+++ b/dlms_cosem/protocol/xdlms/__init__.py
@@ -11,6 +11,7 @@
 from dlms_cosem.protocol.xdlms.data_notification import DataNotification
 from dlms_cosem.protocol.xdlms.exception_response import ExceptionResponse
 from dlms_cosem.protocol.xdlms.general_global_cipher import GeneralGlobalCipher
+from dlms_cosem.protocol.xdlms.general_ded_cipher import GeneralDedCipher
 from dlms_cosem.protocol.xdlms.get import (
     GetRequestFactory,
     GetRequestNext,
diff --git a/dlms_cosem/protocol/xdlms/general_ded_cipher.py b/dlms_cosem/protocol/xdlms/general_ded_cipher.py
new file mode 100644
index 0000000..43a9f6e
--- /dev/null
+++ b/dlms_cosem/protocol/xdlms/general_ded_cipher.py
@@ -0,0 +1,12 @@
+from dlms_cosem.protocol.xdlms.base import AbstractXDlmsApdu
+from dlms_cosem.protocol.xdlms.general_global_cipher import GeneralGlobalCipher
+
+# TODO: move implementation from GeneralGlobalCipher to KeySpecificCiphering
+KeySpecificCipher = type(
+    "KeySpecificCipher", (AbstractXDlmsApdu,), dict(GeneralGlobalCipher.__dict__)
+)
+
+
+class GeneralDedCipher(KeySpecificCipher):
+    TAG = 220
+    NAME = "general-ded-cipher"