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Groups > comp.lang.python > #69978

Re: imaplib: how to specify SSL/TLS protocol version?

From Grant Edwards <invalid@invalid.invalid>
Newsgroups comp.lang.python
Subject Re: imaplib: how to specify SSL/TLS protocol version?
Date 2014-04-09 20:20 +0000
Organization PANIX Public Access Internet and UNIX, NYC
Message-ID <li4a1v$kdo$1@reader1.panix.com> (permalink)
References <li49ik$f94$1@reader1.panix.com>

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On 2014-04-09, Grant Edwards <invalid@invalid.invalid> wrote:
> Connecting to Exchange server fails like this:
>
>  File "/usr/lib64/python2.7/imaplib.py", line 1148, in __init__
>    IMAP4.__init__(self, host, port)
>  SSLError: [Errno 1] _ssl.c:1419: error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version number
>
> Experiments show that when calling ssl.wrap_socket() I have to specify
> ssl_version=PROTOCOL_TLSv1 to avoid the above error.
>
> How do I tell imaplib to use TLS1 instead of SSL3?

I'm not too keen on this approach, but monkey-patching the open()
method seems to work:

def my_imap4_ssl_open(self, host = '', port = 993):
    self.host = host
    self.port = port
    self.sock = socket.create_connection((host, port))
    self.sslobj = ssl.wrap_socket(self.sock, self.keyfile, self.certfile, ssl_version=ssl.PROTOCOL_TLSv1)
    self.file = self.sslobj.makefile('rb')

imaplib.IMAP4_SSL.open = my_imap4_ssl_open 

-- 
Grant Edwards               grant.b.edwards        Yow! I hope the
                                  at               ``Eurythmics'' practice
                              gmail.com            birth control ...

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Thread

imaplib: how to specify SSL/TLS protocol version? Grant Edwards <invalid@invalid.invalid> - 2014-04-09 20:12 +0000
  Re: imaplib: how to specify SSL/TLS protocol version? Grant Edwards <invalid@invalid.invalid> - 2014-04-09 20:20 +0000
    Re: imaplib: how to specify SSL/TLS protocol version? Tim Chase <python.list@tim.thechases.com> - 2014-04-09 15:33 -0500
      Re: imaplib: how to specify SSL/TLS protocol version? Grant Edwards <invalid@invalid.invalid> - 2014-04-09 20:55 +0000
        Re: imaplib: how to specify SSL/TLS protocol version? Grant Edwards <invalid@invalid.invalid> - 2014-04-09 21:10 +0000
          Re: imaplib: how to specify SSL/TLS protocol version? Chris Angelico <rosuav@gmail.com> - 2014-04-10 11:55 +1000
  Re: imaplib: how to specify SSL/TLS protocol version? Tim Chase <python.list@tim.thechases.com> - 2014-04-09 15:26 -0500
  Re: imaplib: how to specify SSL/TLS protocol version? Antoine Pitrou <solipsis@pitrou.net> - 2014-04-10 19:57 +0000

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