[issue9211] Cannot close socket after ssl handshake failed

Christian Hager report at bugs.python.org
Fri Jul 9 11:21:34 CEST 2010

New submission from Christian Hager <metakaram at gmail.com>:

When running a SSL socket server in Python 2.5 or 2.6 (didn't try with newer versions), new connections are setup with "ssl.wrap_socket()". Everything works fine if I connect a client with SSL, but if I just telnet to the server it's not possible to close the socket anymore (receiving data works fine through the non-ssl socket though).

I get a SSL exception like this: "SSLError: [Errno 1] _ssl.c:480: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol". After that I am not able to close the socket, but still can send data on the non-ssl-wrapped socket. How would I close this now open non-ssl socket?

Simplified code:

read_sockets,write_sockets,error_sockets = select.select(CONNECTION_LIST,[],[])
for sock in read_sockets:
    if sock == server_socket:
        newsock, addr = server_socket.accept()

        # SSL Setup
            sslsock = ssl.wrap_socket(newsock, server_side=True, certfile="../cert.pem", keyfile="../cert.pem")
            print "ssl handshake failed"

                newsock.send("bye\r\n") # succeeds
                newsock.close()         # doesn't work

components: IO
messages: 109697
nosy: metachris
priority: normal
severity: normal
status: open
title: Cannot close socket after ssl handshake failed
versions: Python 2.5, Python 2.6

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