From f1d9b1a291c31b1e11ae13419c5e4679352232ab Mon Sep 17 00:00:00 2001
From: Timotej Lazar <timotej.lazar@araneo.si>
Date: Tue, 4 Jul 2023 22:47:41 +0200
Subject: First commit

Heavily amended.
---
 fauxsign.py | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100755 fauxsign.py

(limited to 'fauxsign.py')

diff --git a/fauxsign.py b/fauxsign.py
new file mode 100755
index 0000000..c2c2349
--- /dev/null
+++ b/fauxsign.py
@@ -0,0 +1,78 @@
+#!/usr/bin/env python3
+
+import argparse
+import http.server
+import json
+import pathlib
+import ssl
+import urllib.parse
+
+import lxml
+import signxml
+
+version = '2.2.9.276'
+identifier = 'f8e5f470-bcff-4c50-8fd6-ccfa2fea12d6'
+
+def sign(xml, key, cert):
+    original = lxml.etree.fromstring(xml)
+    signed = signxml.XMLSigner().sign(original, key=key, cert=cert)
+    return ('<?xml version="1.0" encoding="UTF-8" standalone="no" ?>' +
+            lxml.etree.tostring(signed, encoding='unicode'))
+
+class Handler(http.server.BaseHTTPRequestHandler):
+    def reply(self, data):
+        self.send_response(200)
+        self.send_header('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept')
+        self.send_header('Access-Control-Allow-Methods', 'POST,GET,OPTIONS')
+        self.send_header('Access-Control-Allow-Origin', '*')
+        self.send_header('Access-Control-Allow-Private-Network', 'true')
+        self.end_headers()
+        self.wfile.write(json.dumps(data).encode())
+
+    def do_GET(self):
+        url = urllib.parse.urlparse(self.path)
+        match url.path:
+            case '/version':
+                self.reply({'identifier': identifier, 'version': version})
+
+    def do_POST(self):
+        url = urllib.parse.urlparse(self.path)
+        match url.path:
+            case '/updateLicense':
+                self.reply({'error': 1, 'errorMessage': 'OK'})
+            case '/signXML':
+                length = int(self.headers['content-length'])
+                data = json.loads(self.rfile.read(length).decode())
+                xml = data['bytes'][0].removeprefix('XML:').encode()
+                print(f'{self.headers.get("origin", "unknown")} wants to sign:\n{xml}\nConfirm?', end=' ')
+                if input() in ('y', 'yes'):
+                    signed = sign(xml, key=self.server.user_key, cert=self.server.user_cert)
+                    self.reply({
+                        'error': 1,
+                        'errorMessage': '',
+                        'filename': '',
+                        'result': signed,
+                        'signatures': [],
+                        'timestamps': []
+                    })
+                else:
+                    self.reply({'error': -1, 'errorMessage': 'aborted'})
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser(description='Fake the proXSign® application.')
+    parser.add_argument('-k', '--user-key', type=open, required=True, help='key file')
+    parser.add_argument('-c', '--user-cert', type=open, required=True, help='certificate file')
+    parser.add_argument('-K', '--app-key', type=pathlib.Path, required=True, help='app key file')
+    parser.add_argument('-C', '--app-cert', type=pathlib.Path, required=True, help='app certificate file')
+    parser.add_argument('-p', '--port', type=int, default=14972, help='port to listen on')
+    args = parser.parse_args()
+
+    tls_context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
+    tls_context.check_hostname = False
+    tls_context.load_cert_chain(keyfile=args.app_key, certfile=args.app_cert)
+
+    httpd = http.server.HTTPServer(('localhost', args.port), Handler)
+    httpd.user_key = args.user_key.read()
+    httpd.user_cert = args.user_cert.read()
+    httpd.socket = tls_context.wrap_socket(httpd.socket, server_side=True)
+    httpd.serve_forever()
-- 
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