On Wed, Sep 18, 2013 at 08:47:17PM +0000, Viktor Dukhovni wrote: > On Wed, Sep 18, 2013 at 08:04:04PM +0100, Ben Laurie wrote: > > > > This is only realistic with DANE TLSA (certificate usage 2 or 3), > > > and thus will start to be realistic for SMTP next year (provided > > > DNSSEC gets off the ground) with the release of Postfix 2.11, and > > > with luck also a DANE-capable Exim release. > > > > What's wrong with name-constrained intermediates? > > X.509 name constraints (critical extensions in general) typically > don't work.
And public CAs don't generally sell intermediate CAs with name constraints. Rather undercuts their business model. -- Viktor. _______________________________________________ The cryptography mailing list cryptography@metzdowd.com http://www.metzdowd.com/mailman/listinfo/cryptography