add recap and refs
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rohttptls.py
33
rohttptls.py
@ -246,8 +246,8 @@ def tls_server_handler():
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ctx = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
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# Remember what i said about best default and not shooting
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# ourselves in the foot. Well Firefox, does a stupid thing
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# during TLS handshake and declares it supports. SSLv3
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# ourselves in the foot. Well Firefox/Gevent/Python, does a stupid thing
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# during TLS handshake one and declares it supports. SSLv3
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# Which has been considered hopelessly broken since 2014.
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# Mozilla's own security people even said so at the time.
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# See References. Anyway Setting the minimum and maximum
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@ -360,18 +360,19 @@ else:
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daemon_main()
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# To recap we just did a bunch of work, for no user visible change
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# This is not a bad thing, often the first drafts of programs.
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# Will fit the requirements of the moment. But when the requirements
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# change the program must be adapted to fit.
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# This process of iteration and redesign,
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# is called "paying down technical debt", and it should be done whenever
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# possible.
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#
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# And we've just moved up to the second level of the 7 story mountain
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# Yay us.
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#
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# Now for the recap, today we learned how TLS works from the server's
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# Perspective. We learned that python has secure defaults and you
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# should use them unless there's a problem.
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# We also learned that firefox may have a problem, and being explicit
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# about the TLS versions we support fixed that issue.
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# This problem is more likely a bug in gevent, if I had to guess
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# Stay tuned for Part 6 where we will, finally break up
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# with Rick Astley.
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# Cheers
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# References
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# Robustness Principal (Devopedia): https://devopedia.org/postel-s-law
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# IETF RFC 9112 HTTP/1.1 https://datatracker.ietf.org/doc/html/rfc9112
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#
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# Python's SSL Module docs: https://docs.python.org/3/library/ssl.html#ssl.create_default_context
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# End of SSLv3: https://blog.mozilla.org/security/2014/10/14/the-poodle-attack-and-the-end-of-ssl-3-0/
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