Michael,
I do as you mention, drop the four character prefix "sip:" and hash the AOR.

Julian Cain

On Jan 16, 2010, at 12:14 PM, Michael Chen wrote:

> Hi,
> 
> In the current sip-03 draft, the access policy is USER-NODE-MATCH, which 
> requires the AOR matches the rfc822Name in the X509v3 certificate (section 
> 10.3 of base-06 draft).
> 
> rfc822Name is in the format of "n...@domain", so the usual SIP AOR format 
> "sip:n...@domain" is not a valid rfc822Name for the X509v3 certificate. 
> Therefore, when obtaining the Resource ID from a SIP AOR, the input to the 
> hashing function must skip the "sip:" prefix.
> 
> I just want all the principals to verify this and may be noted for 
> implementers in the draft.
> 
> Thanks
> 
> --Michael
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