Re: STS and lockCA

2009-11-12 Thread Adam Barth
On Wed, Nov 11, 2009 at 7:25 AM, Bil Corry b...@corry.biz wrote: Would LockCA prevent the site from loading if it encountered a new cert from the same CA? My understanding is that it would not.  Or are you talking about a site that wants to switch CAs and is using LockCA? I think Gervase

Re: STS and lockCA

2009-11-12 Thread Gervase Markham
On 11/11/09 15:25, Bil Corry wrote: Would LockCA prevent the site from loading if it encountered a new cert from the same CA? No. Hence the name - lock _CA_. :-P (BTW, I'm not subscribed to public-webapps; you'll need to CC me on any conversation you want me in.) Or are you talking about a

Re: STS and lockCA

2009-11-11 Thread Adam Barth
On Tue, Nov 10, 2009 at 7:40 PM, Bil Corry b...@corry.biz wrote: Gervase Markham wrote on 10/01/2009 5:51 PM: I therefore propose a simple extension to the STS standard; a single token to be appended to the end of the header: lockCA One idea to consider, especially for lockCA, is to somehow

Re: STS and lockCA

2009-11-11 Thread Devdatta
One idea to consider, especially for lockCA, is to somehow denote that STS should expire at the same time as the cert, perhaps by omitting max-age or allowing max-age=cert, etc. This will prevent accidentally causing STS to last longer or shorter than the cert expiration, especially

Re: STS and lockCA

2009-11-11 Thread Gervase Markham
On 11/11/09 08:57, Adam Barth wrote: Why do we need a browser mechanism for that? It seems like the site can easily compute whatever max-age value it wishes to set. Not to mention the fact that you normally don't actually want the LockCA to expire at exactly the same time as the cert, because

Re: STS and lockCA

2009-11-11 Thread Bil Corry
Gervase Markham wrote on 11/11/2009 6:28 AM: On 11/11/09 08:57, Adam Barth wrote: Why do we need a browser mechanism for that? It seems like the site can easily compute whatever max-age value it wishes to set. Not to mention the fact that you normally don't actually want the LockCA to

Re: STS and lockCA

2009-11-10 Thread Bil Corry
Gervase Markham wrote on 10/01/2009 5:51 PM: I therefore propose a simple extension to the STS standard; a single token to be appended to the end of the header: lockCA One idea to consider, especially for lockCA, is to somehow denote that STS should expire at the same time as the cert,

Re: STS and lockCA

2009-10-03 Thread Gervase Markham
On 02/10/09 23:54, Hodges, Jeff wrote: Instead of adding them all in v1, we should allow / encourage this kind of experimentation by defining a forwards-compatible grammar for the STS header. Agreed, see the thread entitled more flexible ABNF for STS? That would be a great thing :-) I

Re: STS and lockCA

2009-10-02 Thread Adam Barth
This is an interesting proposal. It addresses a different threat model than the core STS proposal (because you assume the attacker has a valid certificate for victim.com). I think we should resist expanding the scope of the core STS proposal. There are many different kinds of tokens one could

STS and lockCA

2009-10-01 Thread Gervase Markham
Dear public-webapps, I would like to propose a small extension to the current draft specification for Strict Transport Security. http://lists.w3.org/Archives/Public/www-archive/2009Sep/att-0051/draft-hodges-strict-transport-sec-05.plain.html The Problem --- At the moment, if one CA