Re: [openssl-dev] [RFC PATCH] doc/ssl: describe the possible DoS via repeated SSL session re-negotiation

2016-08-11 Thread Sebastian Andrzej Siewior
On 2016-08-11 18:04:41 [+0200], Hubert Kario wrote: > On Thursday, 11 August 2016 13:50:53 CEST Sebastian Andrzej Siewior wrote: > > On 2016-08-11 11:34:24 [+0200], Hubert Kario wrote: > > > it all depends on the environment, in some renegotiation is completely > > > unnecessary (public HTTP

Re: [openssl-dev] [RFC PATCH] doc/ssl: describe the possible DoS via repeated SSL session re-negotiation

2016-08-11 Thread Hubert Kario
On Thursday, 11 August 2016 13:50:53 CEST Sebastian Andrzej Siewior wrote: > On 2016-08-11 11:34:24 [+0200], Hubert Kario wrote: > > it all depends on the environment, in some renegotiation is completely > > unnecessary (public HTTP servers without client certificate based > > authentication), in

Re: [openssl-dev] [RFC PATCH] doc/ssl: describe the possible DoS via repeated SSL session re-negotiation

2016-08-11 Thread Sebastian Andrzej Siewior
On 2016-08-11 11:34:24 [+0200], Hubert Kario wrote: > it all depends on the environment, in some renegotiation is completely > unnecessary (public HTTP servers without client certificate based > authentication), in others just client-initiated renegotiation is needed > (typical configuration

Re: [openssl-dev] [RFC PATCH] doc/ssl: describe the possible DoS via repeated SSL session re-negotiation

2016-08-11 Thread Hubert Kario
On Tuesday, 9 August 2016 21:51:32 CEST Sebastian Andrzej Siewior wrote: > On 2016-08-09 19:26:44 [+], Viktor Dukhovni wrote: > > On Tue, Aug 09, 2016 at 09:18:58PM +0200, Sebastian Andrzej Siewior wrote: > > > I don't really know what I am supposed to do with this information. Do > > > you

Re: [openssl-dev] [RFC PATCH] doc/ssl: describe the possible DoS via repeated SSL session re-negotiation

2016-08-08 Thread Viktor Dukhovni
On Mon, Aug 08, 2016 at 08:57:26PM +0200, Sebastian Andrzej Siewior wrote: > This is a computation attack and unfortunately the way a SSL handshake > works. I understand that this `feature' is part of the TLS specification > and I am not trying to nuke from openssl. Instead I would like to >