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

Adriano Santoni adriano.santoni at staff.aruba.it
Sat Sep 30 06:48:09 UTC 2023

I fully concur with Clint Wilson.


Il 29/09/2023 17:52, Clint Wilson via Smcwg-public ha scritto:
> 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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