[Python-Dev] Controlling the cipher list for SSL connections (original) (raw)

Chris Frantz frantzcj at gmail.com
Thu Sep 10 20:04:22 CEST 2009

Bill,

I agree that it's usually better to let the SSL implementation pick the ciphers.

I have a certain device that I'd like to talk to that is running on an underpowered embedded CPU. When I let OpenSSL pick the ciphers, it chooses something like EDH-RSA-AES-SHA and takes about 3.5 seconds to finish the handshake. If I can restrict the cipher list to RSA-RC4-SHA I can reduce the handshake time to less than a second and improve the throughput of any bulk data transfer over the connection.

--Chris

On Thu, Sep 10, 2009 at 12:09 PM, Bill Janssen<janssen at parc.com> wrote:

Thanks, Chris.  Can you explain why you want to set the cipher list explicitly?  IMO, it's usually better to select a security scheme (TLS1, or SSLv3, etc.), and let the implementation pick the cipher list.

Bill Chris Frantz <frantzcj at gmail.com> wrote:

Done.

Attached to Issue 3597, which is a similar request to mine. Best Regards, --Chris

Python-Dev mailing list Python-Dev at python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/janssen%40parc.com

More information about the Python-Dev mailing list