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POHow to get to the SSL/TLS internals from Python?
 

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  1. POHow to get to the SSL/TLS internals from Python?
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    <p>I am implementing the XMPP protocol in Python (2.7 and 3.2) and I found one important thing stopping me from making the implementation fully compliant. </p> <p>The current specification (<a href="http://xmpp.org/rfcs/rfc6120.html" rel="noreferrer">RFC 6120</a>) requires implementation of the SCRAM-SHA-1-PLUS SASL mechanism (<a href="http://tools.ietf.org/html/rfc5802" rel="noreferrer">RFC 5802</a>), which, in turn, requires the 'tls-unique' channel binding (<a href="http://tools.ietf.org/html/rfc5929" rel="noreferrer">RFC 5929</a>), which is defined as:</p> <blockquote> <p>Description: The first TLS Finished message sent (note: the Finished struct, not the TLS record layer message containing it) in the most recent TLS handshake of the TLS connection being bound to</p> </blockquote> <p>Python doesn't seem to provide this piece of information directly, but I know it may be obtained via the OpenSSL API, used internally by Python.</p> <p>Is there any way to get the 'SSL' pointer for a SSL socket wrapper, so I could use it via the ctypes module or from my own extension module? I cannot find anything like that with the header files installed with Python.</p> <p>Is there any third-party TLS module for Python providing such API, but keeping the general Python SSL API?</p> <p>Or is the only way to do it, to extract the SSL code from Python and bundle a patched copy of it with my own package?</p> <p><strong>Update:</strong> I have created a Python feature request for this functionality: <a href="http://bugs.python.org/issue12551" rel="noreferrer">http://bugs.python.org/issue12551</a> I am still looking for a 'ready to use' solution, though.</p>
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