On 24/01/2012 16:45, Peter Saint-Andre wrote:
On 1/24/12 2:25 AM, Brian Trammell wrote:
Hi, Alexey,
So far only one voice on the WG list, stating no need for CN-ID. However, on
thinking about it a bit further, if you happen to have an older PKI built out,
and you're still using it, you've probably got a large investment in it, and it
probably makes sense to allow you to use it for RID too...
So, I'd suggest the following language to grudgingly allow such a thing:
The use of CN-ID identifiers in certificates identifying RID systems
is NOT RECOMMENDED, and CN-ID identifiers MUST be ignored by PKI
implementations which can use DNS-ID identifiers. However, CN-ID
identifiers MAY be used when the RID consortium to which the system
belongs uses an older, existing PKI implementation.
Brian, first of all, thanks for working with us on this topic. As you
can see from the length of RFC 6125 (which didn't start out that big!),
there's more complexity here than meets the eye.
I think the mix of "NOT RECOMMENDED, MUST be ignored by some, but MAY be
used by others" might be a bit confusing to those who implement and
deploy RID. Also, RFC 6125 makes a distinction between cert generation
and cert checking, which gets obscured by the word "use". Thus I might
make the following suggestion:
The inclusion of Common Names (CN-IDs) in certificates identifying
RID systems is NOT RECOMMENDED. A PKI implementation that
understands DNS-IDs SHOULD ignore CN-IDs when checking server
certificates.
I thought RFC 6125 has a rule saying that CN-IDs are ignored in presence
of DNS-IDs? I would just rather reference RFC 6125, or at least be clear
that this is defined there (using "as specified in RFC 6125").
The rest of your proposal looks fine.
However, because many existing PKI implementations
still include CN-IDs when generating certificates, RID consortiums
might want to continue supporting them during certificate checking.
This removes the normative force from the text about existing PKI
implementations, while still encouraging use of DNS-IDs.
Let us know what you think.
Peter
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