[cabfpub] Ballot 105 Technical Constraints for Subordinate Certificate Authorities yielding broader and safer PKI adoption.

[kirk_hall at trendmicro.com]

In reading Ballot 105, our technical team has a question about Section 9.7, particularly this paragraph


If the Subordinate CA Certificate includes the id-kp-serverAuth extended key usage, then the Subordinate CA MUST include the Name Constraints X.509v3 extension with constraints on dNSName, iPAddress and DirectoryName as follows:-



(a) For each dNSName in permittedSubtrees, the CA MUST confirm that the Applicant has registered the dNSName or has been authorized by the domain registrant to act on the registrant's behalf in line with the verification practices of section 11.1



(b) For each iPAddress range in permittedSubtrees, the CA MUST confirm that the Applicant has been assigned the iPAddress range or has been authorized by the assigner to act on the assignee's behalf.



(c) For each DirectoryName in permittedSubtrees the CA MUST confirm the Applicants and/or Subsidiary's Organizational name and location such that end entity certificates issued from the subordinate CA will be in compliancy with section 9.2.4 and 9.2.5.

The wording "then the Subordinate CA MUST include the Name Constraints X.509v3 extension" is not clear as to whether the constraints are applied to the sub CA certificate or to an EE certificate the sub CA is going to issue.  Should it read "then the Subordinate CA *certificate* MUST include the Name Constraints X.509v3 extension ***" for clarity?  Is that the intention?


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