--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/connectors/ERPC/PSK_Adapter.py	Wed Jan 17 22:09:32 2024 +0100
@@ -0,0 +1,61 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# This file is part of Beremiz, a Integrated Development Environment for
+# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.
+#
+# Copyright (C) 2019: Edouard TISSERANT
+#
+# See COPYING file for copyrights details.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+
+"""
+The TLS-PSK adapter that handles SSL connections instead of regular sockets,
+but using Pre Shared Keys instead of Certificates
+"""
+
+import socket
+import ssl
+
+try:
+    import sslpsk
+except ImportError as e:
+    sslpsk = None
+
+from erpc.transport import TCPTransport
+
+class SSLPSKClientTransport(TCPTransport):
+    def __init__(self, host, port, psk):
+        """ overrides TCPTransport's __init__ to wrap socket in SSl wrapper """
+        super(TCPTransport, self).__init__()
+        self._host = host
+        self._port = port
+        self._isServer = isServer
+        self._sock = None
+
+        if sslpsk is None:
+             raise ImportError("sslpsk module is not available")
+
+        raw_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        raw_sock.setsockopt(socket.SOL_TCP, socket.TCP_NODELAY, 1)
+        raw_sock.connect((self._host, self._port))
+        self._sock = sslpsk.wrap_socket(
+                raw_sock, psk=psk, server_side=False,
+                ciphers="PSK-AES256-CBC-SHA",  # available in openssl 1.0.2
+                ssl_version=ssl.PROTOCOL_TLSv1)
+
+