<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;
mso-ligatures:none;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal>Hello all:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>If widely supported, should we consider documenting this in the S/MIME BR?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Best, Stephen<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> Smcwg-public <smcwg-public-bounces@cabforum.org> <b>On Behalf Of </b>Clint Wilson via Smcwg-public<br><b>Sent:</b> Friday, September 29, 2023 12:52 PM<br><b>To:</b> Ben Wilson <bwilson@mozilla.com>; SMIME Certificate Working Group <smcwg-public@cabforum.org><br><b>Subject:</b> Re: [Smcwg-public] Fields for S/MIME CSRs<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hi all,<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>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 <i>may</i> 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.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>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.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Cheers,<o:p></o:p></p></div><div><p class=MsoNormal>-Clint<o:p></o:p></p><div><p class=MsoNormal><br><br><o:p></o:p></p><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal>On Sep 29, 2023, at 8:27 AM, Ben Wilson via Smcwg-public <<a href="mailto:smcwg-public@cabforum.org">smcwg-public@cabforum.org</a>> wrote:<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><div><p class=MsoNormal>All,<o:p></o:p></p></div><div><p class=MsoNormal>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?<o:p></o:p></p></div><div><p class=MsoNormal>Thanks,<o:p></o:p></p></div><div><p class=MsoNormal>Ben<o:p></o:p></p></div></div><p class=MsoNormal>_______________________________________________<br>Smcwg-public mailing list<br><a href="mailto:Smcwg-public@cabforum.org">Smcwg-public@cabforum.org</a><br><a href="https://url.avanan.click/v2/___https:/lists.cabforum.org/mailman/listinfo/smcwg-public___.YXAzOmRpZ2ljZXJ0OmE6bzo0ODEzZjE5MTQ3NmQzMzBiY2EzZTg1MTAwNWYzODA0NTo2OjgzYjE6YjY4YzcwZWIwNTgwZmY3MmVlMjljNzM5Yzg0YmE4OWMyYTUwMDJmODE3NWY5ZTBjOWI5NzFiZjllODc2YjMwMjp0OkY">https://url.avanan.click/v2/___https://lists.cabforum.org/mailman/listinfo/smcwg-public___.YXAzOmRpZ2ljZXJ0OmE6bzo0ODEzZjE5MTQ3NmQzMzBiY2EzZTg1MTAwNWYzODA0NTo2OjgzYjE6YjY4YzcwZWIwNTgwZmY3MmVlMjljNzM5Yzg0YmE4OWMyYTUwMDJmODE3NWY5ZTBjOWI5NzFiZjllODc2YjMwMjp0OkY</a><o:p></o:p></p></div></blockquote></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>