[Smcwg-public] [External Sender] Re: [EXTERNAL]-Re: Fields for S/MIME CSRs

Adriano Santoni adriano.santoni at staff.aruba.it
Mon Oct 2 06:57:16 UTC 2023

Not necessarily: the email address can be transmitted to the CA as a 
separate datum.

Indeed, I would say that this is preferable because it allows syntax 
checking on the email address without even starting to look at the CSR, 
from which in my opinion only the public key should be taken.


Il 29/09/2023 21:21, Ben Wilson via Smcwg-public ha scritto:
> NOTICE: Pay attention - external email - Sender is 
> 0100018ae263a9a7-3e84e260-b7d7-43c5-85cb-d1425682cb27-000000 at amazonses.com 
> Shouldn't at least the email address be included, and verified, of 
> course, by the CA?
> On Fri, Sep 29, 2023, 11:35 AM Pedro FUENTES <pfuentes at wisekey.com> wrote:
>     +1
>>     Le 29 sept. 2023 à 17:52, Clint Wilson via Smcwg-public
>>     <smcwg-public at cabforum.org> a écrit :
>>     Hi all,
>>     In my opinion, CSRs should really be limited to conveying the
>>     public key and a proof of possession of the private key; the
>>     fields included therein /may/ act as confirmatory signals for a
>>     CA, but shouldn’t be directly relied upon e.g. to generate a
>>     tbsCertificate. Rather, the values placed in fields of a
>>     tbsCertificate should originate from the CA’s validated data
>>     store to ensure that the only paths for data to become part of a
>>     signed certificate are through static configurations (e.g.
>>     signatureAlgorithm) or known-validated data.
>>     There’s plenty of nuance we can discuss as well, but generally
>>     speaking I believe it’s bad practice to rely on fields in the CSR.
>>     Cheers,
>>     -Clint
>>>     On Sep 29, 2023, at 8:27 AM, Ben Wilson via Smcwg-public
>>>     <smcwg-public at cabforum.org> wrote:
>>>     All,
>>>     I'm interested in gathering information from Certificate Issuers
>>>     about the kind of information that they would like to
>>>     collect/extract from the CSRs they receive from S/MIME
>>>     certificate applicants. This information could be used to refine
>>>     a system to generate CSRs that result in certificates compliant
>>>     with the various profiles defined in the S/MIME BRs.
>>>     Alternatively, what is the minimum amount of information that
>>>     CAs might expect to obtain from CSRs? In other words, which
>>>     fields should a CSR generator integrated with a Certificate
>>>     Consumer's software support?
>>>     Thanks,
>>>     Ben
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