rfc4310bis 03 AD Feedback

All,

One of the items for the AD review of rfc4310bis is below.  I want to bring
this up to the list for feedback, since this is text from the original RFC.

>>       An OPTIONAL <secDNS:maxSigLife> element that indicates a child's
>>       preference for the number of seconds after signature generation
>>       when the parent's signature on the DS information provided by the
>>       child will expire.  A client SHOULD specify the same <secDNS:
>>       maxSigLife> value for all <secDNS:dsData> elements associated with
>>       a domain.  If the <secDNS:maxSigLife> is not present, or if
>>       multiple <secDNS:maxSigLife> values are requested, the default
>>       signature expiration policy of the server operator (as determined
>>       using an out-of-band mechanism) applies.
> 
> I am slightly surprised that the latter is not an error condition.
> But if this what people have implemented, then Ok.

So the question is around specifying different secDNS:maxSigLife values for
the secDNS:dsData (DS Data Interface) or secDNS:keyData (Key Data
Interface).  The RFC recommends (SHOULD) that the client use the same
secDNS:maxSigLife value, but does not mandate it.  The question is whether
the server signature expiration policy should apply when the client does
specify multiple values for a domain and the server accepts it.  It makes
more sense to me that the server should return an error if passing a
different secDNS:maxSigLife will result in the default being applied by the
server.  If an error is returned, I would propose returning 2306, since it
would be up to the server policy to have a single signature expiration
across all DS or keys of a domain.  If it¹s not up to server policy, then
the draft should use MUST instead of SHOULD for the client and the server
should return an error like 2305 ³Object association prohibits operation² or
2004 ³Parameter value range error².  I don¹t believe either 2305 or 2004
match the error exactly, but I guess I would lean towards 2004.  Any
opinions on which error code to use?

Please reply to the list or to me privately related to your preference on
this feedback.  

Thanks,

-- 


JG 

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James F. Gould
Principal Software Engineer
VeriSign Naming Services
[email protected]
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