check master key after importing the cached session

Author: mdulaney

tests/test_ssl.py

@@ -2200,20 +2200,40 @@ def test_session_success(self):
             b"\xa7\x9c\xcd\x9b\x87\xbb\xb3\xdc\xf6\x76\x70\xf9\xc0\xdd\xf4\xef"
         )
 
+        master_key = (
+            b"\x0f\xb2\x51\xe3\x15\x60\x2d\xef\x6e\x6d\xd2\x94\x2d\xe5\x37\x96"
+            b"\x72\xfa\xce\xb0\x39\xcc\x8d\xdf\xab\x32\xcc\x75\x0c\x66\xf9\xfd"
+            b"\xef\xbc\xc6\x2a\x8f\x9c\x35\x16\xfd\x4d\x38\xd9\xf9\xeb\x1d\xe4"
+        )
+
         session_data = (
-            b"\x30\x71\x02\x01\x01\x02\x02\x03\x03\x04\x02\xc0\x30\x04\x20" +
-            session_id +
-            b"\x04\x30\x0f\xb2\x51\xe3\x15\x60\x2d\xef\x6e\x6d\xd2\x94\x2d\xe5" +
-            b"\x37\x96\x72\xfa\xce\xb0\x39\xcc\x8d\xdf\xab\x32\xcc\x75\x0c\x66" +
-            b"\xf9\xfd\xef\xbc\xc6\x2a\x8f\x9c\x35\x16\xfd\x4d\x38\xd9\xf9\xeb" +
-            b"\x1d\xe4\xa1\x06\x02\x04\x66\xec\x4c\x2d\xa2\x04\x02\x02\x02\x58" +
-            b"\xa4\x02\x04\x00"
+            # sequence length=0x71
+            b"\x30\x71"
+            # integer (version)
+            b"\x02\x01\x01"
+            # integer (SSL version)
+            b"\x02\x02\x03\x03"
+            # octet-string (cipher suite)
+            b"\x04\x02\xc0\x30"
+            # octet-string length=0x20 (session id)
+            b"\x04\x20" + session_id +
+            # octet-string length=0x30 (master secret)
+            b"\x04\x30" + master_key +
+            # application (1), integer (time)
+            b"\xa1\x06\x02\x04" + b"\x66\xec\x4c\x2d" +
+            # application (2), integer (timeout)
+            b"\xa2\x04\x02\x02" + b"\x02\x58" +
+            # application (4), octet-string (session id context)
+            b"\xa4\x02\x04" + b"\x00"
         )
         serverSocket, clientSocket = socket_pair()
 
         client = loopback_client_factory(clientSocket, session_data=session_data)
         server = loopback_server_factory(serverSocket, session_data=session_data)
 
+        assert client.master_key() == master_key
+        assert server.master_key() == master_key
+
         handshake(client, server)
 
         client.send(b"hello world")