Add osmo-ras.py Server for RAM over HTTP

Change-Id: Ib8fdc8f00f0b5bcd3365eca49b611328343a7edb

osmo-ras.py

@@ -0,0 +1,46 @@
+#!/usr/bin/env python3
+
+# Remote Application Server for Remote Application Management over HTTP
+# See Amendment B of the GlobalPlatform Card Specification v2.2
+#
+# (C) 2025 sysmocom s.f.m.c.
+# Author: Daniel Willmann <dwillmann@sysmocom.de>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from http.server import HTTPServer, SimpleHTTPRequestHandler
+from ssl import PROTOCOL_TLS_SERVER, SSLContext, TLSVersion
+
+
+context = SSLContext(PROTOCOL_TLS_SERVER)
+context.maximum_version = TLSVersion.TLSv1_2
+CIPHERS_1_0 = "TLS_PSK_WITH_3DES_EDE_CBC_SHA,TLS_PSK_WITH_AES_128_CBC_SHA,TLS_PSK_WITH_NULL_SHA"
+CIPHERS_1_2 = "TLS_PSK_WITH_AES_128_CBC_SHA256,TLS_PSK_WITH_NULL_SHA256"
+context.set_ciphers(CIPHERS_1_2)
+
+# A table using the identity of the client:
+psk_table = { 'ClientId_1': bytes.fromhex('c0ffee'),
+              'ClientId_2': bytes.fromhex('facade')
+}
+
+def get_psk(ident):
+    """ Get the PSK for the client """
+    print(f"Get PSK for {ident}")
+    return psk_table.get(ident, b'')
+
+context.set_psk_server_callback(get_psk)
+
+server = HTTPServer(("0.0.0.0", 8080), SimpleHTTPRequestHandler)
+server.socket = context.wrap_socket(server.socket, server_side=True)
+server.serve_forever()