From: "Iruatã Souza" <iru.muzgo@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] using tls-psk cipher suits vs roll our own handshake
Date: Thu, 24 Dec 2015 17:09:09 +0000 [thread overview]
Message-ID: <CABJnqBRxTnt5AZvVLsZEsmWvVswJNidruO_FkWHaXg5cshnzoA@mail.gmail.com> (raw)
In-Reply-To: <71b465e856dfbd4b3ce36c3a3ae6bf03@felloff.net>
5) seems to much effort to do right/securely, no?
On Thu, Dec 24, 2015 at 4:45 PM, <cinap_lenrek@felloff.net> wrote:
> plan9 currently uses the shared secret from the authentication
> process with ssl and rc4 cipher for encrypting traffic for
> exportfs and the cpu services (pushssl()). the cipher can be
> changed by the client by providing command line parameters,
> tho there is no real negotiation going on. if the server
> doesnt like the cipher from the client, the connection just
> breaks.
>
> when switching to tls, we have a few options:
>
> 1) do as we do with ssl, client sends what cipher and hash alg
> it wants as a string before calling pushtls().
>
> 2) use fixed cipher like chacha20/poly1305 aead unconditionally.
>
> 3) use fixed cipher initially, and after that, renegotiate
> cipher (devtls can change secrets and ciphers inband).
>
> 4) use standard tls handshake with PSK cipher suits.
>
> 5) make our own little cipher negotiation handshake protocol.
>
> suggestions?
>
> --
> cinap
>
next prev parent reply other threads:[~2015-12-24 17:09 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-24 16:45 cinap_lenrek
2015-12-24 17:09 ` Iruatã Souza [this message]
2015-12-24 23:49 ` cinap_lenrek
2015-12-25 2:34 ` Alex Weber
2015-12-25 3:03 ` cinap_lenrek
2015-12-29 18:34 ` Charles Forsyth
2015-12-29 18:35 ` Charles Forsyth
2016-01-03 4:03 ` cinap_lenrek
2015-12-29 20:31 ` Kenny Lasse Hoff Levinsen
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