From f2b2b81ca7227b3f9cbee2b7e9e5f6ff4e2867e8 Mon Sep 17 00:00:00 2001
From: Jesse Luehrs <doy@tozt.net>
Date: Thu, 16 Oct 2014 13:07:32 -0400
Subject: add ssl support

---
 termcast_server/termcast.py | 97 +++++++++++++++++++++++++++++++++++----------
 1 file changed, 75 insertions(+), 22 deletions(-)

(limited to 'termcast_server/termcast.py')

diff --git a/termcast_server/termcast.py b/termcast_server/termcast.py
index f99971d..a2318d6 100644
--- a/termcast_server/termcast.py
+++ b/termcast_server/termcast.py
@@ -1,6 +1,7 @@
 import time
 import json
 import re
+import ssl
 
 import vt100
 
@@ -132,27 +133,26 @@ class Handler(object):
         return ret
 
 class Connection(object):
-    def __init__(self, client, connection_id, publisher):
+    def __init__(self, client, connection_id, publisher, pemfile):
         self.client = client
         self.connection_id = connection_id
         self.publisher = publisher
+        self.pemfile = pemfile
         self.viewers = 0
+        self.context = None
 
     def run(self):
-        buf = b''
-        while len(buf) < 1024 and b"\n" not in buf:
-            buf += self.client.recv(1024)
-
-        pos = buf.find(b"\n")
-        if pos == -1:
+        auth = self._readline()
+        if auth is None:
             print("no authentication found")
             return
+        print(auth)
 
-        auth = buf[:pos]
-        if auth[-1:] == b"\r":
-            auth = auth[:-1]
-
-        buf = buf[pos+1:]
+        if auth == b"starttls":
+            if not self._starttls():
+                print("TLS connection failed")
+                return
+            auth = self._readline()
 
         m = auth_re.match(auth)
         if m is None:
@@ -163,16 +163,7 @@ class Connection(object):
         self.name = m.group(1)
         self.client.send(b"hello, " + self.name + b"\n")
 
-        extra_data = {}
-        m = extra_data_re.match(buf)
-        if m is not None:
-            try:
-                extra_data_json = m.group(1).decode('utf-8')
-                extra_data = json.loads(extra_data_json)
-            except Exception as e:
-                print("failed to parse metadata: %s" % e, file=sys.stderr)
-                pass
-            buf = buf[len(m.group(0)):]
+        extra_data, buf = self._try_read_metadata()
 
         if "geometry" in extra_data:
             self.handler = Handler(
@@ -234,3 +225,65 @@ class Connection(object):
             "total_time": self.handler.total_time(),
             "viewers": self.viewers,
         }
+
+    def _readline(self):
+        buf = b''
+        while len(buf) < 1024 and b"\n" not in buf:
+            buf += self.client.recv(1)
+
+        pos = buf.find(b"\n")
+        if pos == -1:
+            return
+
+        line = buf[:pos]
+        if line[-1:] == b"\r":
+            line = line[:-1]
+
+        return line
+
+    def _starttls(self):
+        if self.context is None:
+            self.context = ssl.create_default_context(
+                purpose=ssl.Purpose.CLIENT_AUTH
+            )
+            self.context.load_cert_chain(certfile=self.pemfile)
+        try:
+            self.client = self.context.wrap_socket(
+                self.client, server_side=True
+            )
+        except Exception as e:
+            print('*** TLS connection failed: ' + str(e))
+            return False
+
+        return True
+
+    def _try_read_metadata(self):
+        buf = b''
+        while len(buf) < 6:
+            more = self.client.recv(6 - len(buf))
+            if len(more) > 0:
+                buf += more
+            else:
+                return {}, buf
+
+        if buf != b'\033]499;':
+            return {}, buf
+
+        while len(buf) < 4096 and b"\007" not in buf:
+            buf += self.client.recv(1)
+
+        if b"\007" not in buf:
+            return {}, buf
+
+        extra_data = {}
+        m = extra_data_re.match(buf)
+        if m is not None:
+            try:
+                extra_data_json = m.group(1).decode('utf-8')
+                extra_data = json.loads(extra_data_json)
+            except Exception as e:
+                print("failed to parse metadata: %s" % e, file=sys.stderr)
+                pass
+            buf = buf[len(m.group(0)):]
+
+        return extra_data, buf
-- 
cgit v1.2.3-54-g00ecf