Distributed SSL session cache

[kyprizel]

$ openssl rand -base64 48 | awk '{print "-----BEGIN SESSION TICKET
KEY-----"; print; print "-----END SESSION TICKET KEY-----"}' >>
ticket.key.new && cat ticket.key | awk 'sa==1{n++;sa=1}/-----BEGIN SESSION
TICKET KEY-----/{sa=1;X=2}{if(n<3*X){print;}}' >> ticket.key.new && mv
ticket.key.new ticket.key

store not more than X=2 old keys + new one, you can add it to cron file.

I know it's weird to use awk, but I only try to illustrate that it's not a
big problem to rotate keys with my schema ;) But you can' rotate keys with
oneliner if you use "one key per file schema" - there'll be too big
probability of mistake during nginx config parsing.


On Mon, Sep 30, 2013 at 7:31 PM, Maxim Dounin <mdounin at mdounin.ru> wrote:

> Hello!
>
> On Mon, Sep 30, 2013 at 07:14:59PM +0400, kyprizel wrote:
>
> > $ openssl rand -base64 48 | awk '{print "-----BEGIN SESSION TICKET
> > KEY-----"; print; print "-----END SESSION TICKET KEY-----"}' >>
> > ticket.key.new && cat ticket.key >> ticket.key.new && mv ticket.key.new
> > ticket.key
> >
> > There is no difference b/w binary and PEM form here, but I prefer to see
> > config files in printable characters.
>
> I would prefer printable configs as well.  But I don't really
> think that adding PEM header/footer with awk counts as a trivial
> way to do things.  It's not something an ordinary admin can do
> with at least 50% chance of getting a correct result for the first
> time.
>
> And, BTW, your key rotation lacks removing of an old key, which
> makes it unusable.  Correct implementation will require keeping
> each key in it's own file - which essentially makes "single file
> per key" aproach more natural.
>
> --
> Maxim Dounin
> http://nginx.org/en/donation.html
>
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> nginx-devel at nginx.org
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>
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