netdev - Re: [PATCH net-next 3/5] tcp: Print list of TFO-keys from proc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-id: <20181217233505.GC41383@MacBook-Pro-19.local>
Date:   Mon, 17 Dec 2018 15:35:05 -0800
From:   Christoph Paasch <cpaasch@...le.com>
To:     Yuchung Cheng <ycheng@...gle.com>
Cc:     Eric Dumazet <eric.dumazet@...il.com>,
        netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        David Miller <davem@...emloft.net>
Subject: Re: [PATCH net-next 3/5] tcp: Print list of TFO-keys from proc

On 17/12/18 - 08:52:22, Yuchung Cheng wrote:
> On Sun, Dec 16, 2018 at 10:32 PM Eric Dumazet <eric.dumazet@...il.com> wrote:
> >
> >
> >
> > On 12/14/2018 02:40 PM, Christoph Paasch wrote:
> > > Print the list of the TFO-keys with a comma separated. For setting the
> > > keys, we still only allow a single one to be set.
> > >
> >
> > I wonder if some applications expecting current format could break
> > after a formatting change.
> I have the same concern as well. print the extra keys in a different
> sysctl maybe? e.g. net.ipv4.tcp_fastopen_alt_keys

True, some apps might break on that.


Having a single place where all the keys are shown is still useful as that
way the key-rotation can simply check the current keys in one place.

I'm fine with adding net.ipv4.tcp_fastopen_key_list or something like that,
if we want to keep sysctl-API stable.


Christoph