Re: Name Constraints, was Re: [caops-wg] Re: ca signing policy file

David Chadwick writes:

Can anyone give me evidence of support or non-support of commercial CAs for the name constraints extension?

Well, in the recent past, no commercial client software supported name constraints, so whether commercial CAs supported them or not was a moot point. Well worse than that, since it's a critical extension. Your CA would be useless. openssl doesn't support it, so that makes use of name constraints in the web &c world pretty much impossible. I am not sure whether recent Windows products can; it would make sense that they do, because of cross-signing support, but I don't know.