[unicast]

Just tuning in here, may be missing context, but this seems like something
that should be on m.d.s.p?

On Jan 12, 2017 12:52 PM, "Gervase Markham via Public" <public@cabforum.org>
wrote:

> Here's v4. I've decided to leave the email situation unchanged for now,
> in the name of getting the SSL situation put to bed. We can address it
> in a different discussion.
>
> This is the same as v3 except it allows the issuance of SHA-1
> intermediates to add EKUs so that they can be used in chains meeting the
> other requirements (a fix for a problem Bruce pointed out).
>
> <quote>
> CAs may only sign SHA-1 hashes over end-entity certificates which chain
> up to roots in Mozilla's program if all the following are true:
>
> 1) The end-entity certificate:
> * is not within the scope of the Baseline Requirements;
> * contains an EKU extension which does not contain either of the id-kp-
>   serverAuth or anyExtendedKeyUsage key purposes;
> * has at least 64 bits of entropy from a CSPRNG in the serial number.
>
> 2) The issuing intermediate:
> * contains an EKU extension which does not contain either of the id-kp-
>   serverAuth or anyExtendedKeyUsage key purposes;
> * has a pathlen:0 constraint.
>
> CAs may only sign SHA-1 hashes over issuing intermediates which chain
> up to roots in Mozilla's program if the certificate to be signed is a
> duplicate of an existing SHA-1 intermediate certificate with the only
> change being the addition of an EKU to meet the requirements outlined
> above.
>
> CAs may only sign SHA-1 hashes over OCSP responses if the signing
> certificate contains an EKU extension which contains only the
> id-kp-ocspSigning EKU.
>
> CAs may only sign SHA-1 hashes over CRLs for roots and intermediates
> which have issued SHA-1 certificates.
>
> CAs may not sign SHA-1 hashes over other data, including CT
> pre-certificates.
> </quote>
>
> Gerv
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