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Re: Ncat Wildcard Matching rules
From: David Fifield <david () bamsoftware com>
Date: Thu, 18 Jun 2009 09:13:53 -0600

On Thu, Jun 18, 2009 at 04:09:52PM +0100, Rob Nicholls wrote:
On Thu, 18 Jun 2009 08:55:11 -0600, David Fifield <david () bamsoftware com>
wrote:
On Thu, Jun 18, 2009 at 09:08:37AM +0100, Rob Nicholls wrote:
On Wed, 17 Jun 2009 12:03:03 -0600, David Fifield
<david () bamsoftware com>
wrote:
How common are these wildcard certificates in practice? Does anybody
run
an SSL site with one of them?

I don't use a wildcard certificate on my own website, but I've tested a
number of clients in the last few years that have used them on theirs.
So
they're not uncommon.

Are they the kind that would be handled by a single leftmost wildcard,
nothing fancier?

Yes, I don't think I've ever seen anything other than a single leftmost
wildcard.

I've also seen wildcard certificates that have a Subject Alternative Name
of the domain itself (as a certificate for *.domain.tld isn't valid for any
sites hosted at https://domain.tld), but that's about as exotic as I can
remember. I presume whatever code handles SANs would also cope with a
wildcard with SANs.

Yeah, Ncat already looks at the alternative names, and I suppose we
would use the same matching for those and the common name, unless
there's a reason not to.

David Fifield

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