chapter06/safe_tls.py does not work with Python 3.6 about fopnp

[brandon-rhodes]

I am confused in the other direction: about why it works without error on Python 3.4, since unknown ca seems a very reasonable response from the client since it indeed has no way to recognize the CA as a valid one. To get the client to accept the server's certificate, you need to provide the CA as the client's base trusted authority — try this and see how it behaves under Python 3.6 on your system:

$ python2.7 safe_tls.py -a ca.crt localhost 8000
Connected to host 'localhost' and port 8000
'Simple is better than complex.'

Let me know what it does, and good luck!

[song-wei]

[root@cacti geo_env]# /usr/local/python3/bin/python3.6 safe_tls.py -a ca.crt localhost 1060
Connected to host 'localhost' and port 1060
b'Simple is better than complex.'

[brandon-rhodes]

It worked — wonderful! Are there any further issues we should resolve before closing this issue, do you think?

[song-wei]

I'm ok with this chapter, you can close it. Thank you.