<div dir="ltr"><div>On today's Validation SC call, a concern was raised about the scope and timing of the addition to section 1.6.4 Conventions that describes the method to be used for computing time differences across the entire document. Since this has effects well beyond CRLs - for example, the lifetime of a random value - it was agreed that it should have a future effective date that allows time for CAs to become compliant. I've update the proposal to reflect the conclusion of this discussion:<br></div><div><br></div><div><a href="https://github.com/cabforum/servercert/compare/main...wthayer:ballot-SC52">https://github.com/cabforum/servercert/compare/main...wthayer:ballot-SC52</a></div><div><br></div><div>Please have a look and reply with any problems that you find with the new language.<br></div><div><br></div><div>Note that line 1319 will become redundant on 1-June 2022 and should be removed in a future cleanup ballot.</div><div><br></div><div>Thanks,</div><div><br></div><div>Wayne<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Oct 31, 2021 at 1:08 PM Wayne Thayer via Validation <<a href="mailto:validation@cabforum.org">validation@cabforum.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Good point Tim. I just updated the branch to state "at least every 367 days; and" to match section 4.9.10.<br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Oct 29, 2021 at 1:23 PM Tim Hollebeek <<a href="mailto:tim.hollebeek@digicert.com" target="_blank">tim.hollebeek@digicert.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang="EN-US"><div><p class="MsoNormal"><br>Line 1301: “i. once every 367 days; and”<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">I think that provision needs an “at least” as well. I don’t think we expect CAs to issue CRLs once every 367 days.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">-Tim<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><div style="border-color:currentcolor currentcolor currentcolor blue;border-style:none none none solid;border-width:medium medium medium 1.5pt;padding:0in 0in 0in 4pt"><div><div style="border-color:rgb(225,225,225) currentcolor currentcolor;border-style:solid none none;border-width:1pt medium medium;padding:3pt 0in 0in"><p class="MsoNormal"><b>From:</b> Wayne Thayer <<a href="mailto:wthayer@gmail.com" target="_blank">wthayer@gmail.com</a>> <br><b>Sent:</b> Monday, October 18, 2021 8:29 PM<br><b>To:</b> Ryan Sleevi <<a href="mailto:sleevi@google.com" target="_blank">sleevi@google.com</a>><br><b>Cc:</b> Dimitris Zacharopoulos (HARICA) <<a href="mailto:dzacharo@harica.gr" target="_blank">dzacharo@harica.gr</a>>; CABforum3 <<a href="mailto:validation@cabforum.org" target="_blank">validation@cabforum.org</a>>; Tim Hollebeek <<a href="mailto:tim.hollebeek@digicert.com" target="_blank">tim.hollebeek@digicert.com</a>><br><b>Subject:</b> Re: [cabf_validation] CRL Validity Interval Ballot<u></u><u></u></p></div></div><p class="MsoNormal"><u></u> <u></u></p><div><p class="MsoNormal">Thank you Ryan! I merged in your changes: <a href="https://github.com/cabforum/servercert/compare/main...wthayer:ballot-SC52" target="_blank">https://github.com/cabforum/servercert/compare/main...wthayer:ballot-SC52</a> <u></u><u></u></p></div><p class="MsoNormal"><u></u> <u></u></p><div><div><p class="MsoNormal">On Fri, Oct 15, 2021 at 2:12 PM Ryan Sleevi <<a href="mailto:sleevi@google.com" target="_blank">sleevi@google.com</a>> wrote:<u></u><u></u></p></div><blockquote style="border-color:currentcolor currentcolor currentcolor rgb(204,204,204);border-style:none none none solid;border-width:medium medium medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in"><div><p class="MsoNormal">Suggested edits in <a href="https://github.com/wthayer/servercert/pull/12/files" target="_blank">https://github.com/wthayer/servercert/pull/12/files</a> as PR to your branch<u></u><u></u></p></div><p class="MsoNormal"><u></u> <u></u></p><div><div><p class="MsoNormal">On Fri, Oct 15, 2021 at 4:59 PM Wayne Thayer <<a href="mailto:wthayer@gmail.com" target="_blank">wthayer@gmail.com</a>> wrote:<u></u><u></u></p></div><blockquote style="border-color:currentcolor currentcolor currentcolor rgb(204,204,204);border-style:none none none solid;border-width:medium medium medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in"><div><div><p class="MsoNormal">How does this look?<u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal"><a href="https://github.com/cabforum/servercert/compare/main...wthayer:ballot-SC52" target="_blank">https://github.com/cabforum/servercert/compare/main...wthayer:ballot-SC52</a><u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">Thanks,<u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">Wayne<u></u><u></u></p></div></div><p class="MsoNormal"><u></u> <u></u></p><div><div><p class="MsoNormal">On Thu, Oct 14, 2021 at 11:50 AM Dimitris Zacharopoulos (HARICA) <<a href="mailto:dzacharo@harica.gr" target="_blank">dzacharo@harica.gr</a>> wrote:<u></u><u></u></p></div><blockquote style="border-color:currentcolor currentcolor currentcolor rgb(204,204,204);border-style:none none none solid;border-width:medium medium medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in"><div><p class="MsoNormal" style="margin-bottom:12pt">That's my understanding too. If we are to create the "validity interval" definition, we must be clear that it is only applicable to CRLs and OCSP responses and that might be a bit challenging. Also change the term in 4.9.10 "validity interval" instead of "validity period".<br><br>Dimitris.<u></u><u></u></p><div><p class="MsoNormal">On 14/10/2021 7:34 μ.μ., Wayne Thayer wrote:<u></u><u></u></p></div><blockquote style="margin-top:5pt;margin-bottom:5pt"><div><div><p class="MsoNormal">My conclusion from this discussion is that the ballot should be updated to specify the validity interval of root CRLs and OCSP responses in days instead of months, with 397 days a SHOULD and 398 days a MUST. Ryan and Dimitris, is that correct?<u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">Shall I also create a definition for 'validity interval' and make it applicable to CRLs and OCSP responses?<u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">Thanks,<u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">Wayne<u></u><u></u></p></div></div><p class="MsoNormal"><u></u> <u></u></p><div><div><p class="MsoNormal">On Wed, Oct 13, 2021 at 8:08 AM Ryan Sleevi <<a href="mailto:sleevi@google.com" target="_blank">sleevi@google.com</a>> wrote:<u></u><u></u></p></div><blockquote style="border-color:currentcolor currentcolor currentcolor rgb(204,204,204);border-style:none none none solid;border-width:medium medium medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in"><div><div><p class="MsoNormal"><u></u> <u></u></p></div><p class="MsoNormal"><u></u> <u></u></p><div><div><p class="MsoNormal">On Wed, Oct 13, 2021 at 10:57 AM Dimitris Zacharopoulos (HARICA) <<a href="mailto:dzacharo@harica.gr" target="_blank">dzacharo@harica.gr</a>> wrote:<u></u><u></u></p></div><blockquote style="border-color:currentcolor currentcolor currentcolor rgb(204,204,204);border-style:none none none solid;border-width:medium medium medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in"><div><p class="MsoNormal" style="margin-bottom:12pt"><u></u> <u></u></p><div><p class="MsoNormal">On 13/10/2021 5:17 μ.μ., Ryan Sleevi wrote:<u></u><u></u></p></div><blockquote style="margin-top:5pt;margin-bottom:5pt"><div><div><p class="MsoNormal"><u></u> <u></u></p></div><p class="MsoNormal"><u></u> <u></u></p><div><div><p class="MsoNormal">On Wed, Oct 13, 2021 at 10:05 AM Dimitris Zacharopoulos (HARICA) <<a href="mailto:dzacharo@harica.gr" target="_blank">dzacharo@harica.gr</a>> wrote:<u></u><u></u></p></div><blockquote style="border-color:currentcolor currentcolor currentcolor rgb(204,204,204);border-style:none none none solid;border-width:medium medium medium 1pt;padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in"><div><p class="MsoNormal">4.9.7 and 4.9.10 have a nextUpdate requirement for Root CRLs and OCSP responses, and this is set for 12 months. Do we want the same level of "accuracy" as the CRL/OCSP responses of Subordinate CAs? If we do not, then we can focus on language about just the CRLs/OCSP responses issued by "online" CAs, as Wayne has already done at the proposed ballot and there is no need to make further changes to the BRs. <br><br>If I understand your position, you believe we should be specific (to the second) only for specific requirements, such as those linked to RFC 5280 (validity of a certificate, validity period of a CRL/OCSP response) and not the other cases (related to request tokens, audit reports, etc). Is that accurate?<u></u><u></u></p></div></blockquote><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">Got it. Definite misunderstanding :)<u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">To try to rephrase:<u></u><u></u></p></div><div><ul type="disc"><li class="MsoNormal">Defining a day to be 86,400 seconds (with caveats) is appropriate for Section 1.6.4 if the desire is to make this ballot a broader "date interval" cleanup rather than just the CRL cleanup<u></u><u></u></li><li class="MsoNormal">This convention cannot address the "inclusive" aspect; that will need to remain appropriate for ASN.1 types (certificates, CRLs, OCSP)<u></u><u></u></li><li class="MsoNormal">The term "validity period" refers to certificates, and comes from X.509/RFC 5280. The term "validity interval" is a term we introduced for OCSP, because CRLs and OCSP responses don't necessarily have 'validity periods' (intervals, freshness, etc are all concepts used to refer to them) <u></u><u></u></li></ul><ul type="disc"><ul type="circle"><li class="MsoNormal">Taken together with the previous bullet: This means there still needs to be definitions specific to those, and within the specific sections (long-term, this would be the relevant profiles for certificates, CRLs, and OCSP, rather than the current distributed locations)<u></u><u></u></li></ul></ul><ul type="disc"><li class="MsoNormal">Procedural controls - request tokens, audit reports, etc - still make sense to define in days<u></u><u></u></li></ul><ul type="disc"><ul type="circle"><li class="MsoNormal">However, the choice of period - 90 days vs 93 days, 397 days vs 398 days, 31 days vs 32 days - were intentionally selected to <i>allow</i> CAs to have a fixed calendrical schedule, without risk of violation.<u></u><u></u></li><li class="MsoNormal">For example, if you have a 30 day period, then over a year, you will have shifted 5 to 6 days. You won't be able to, for example, "do something on the first of every month"<u></u><u></u></li><li class="MsoNormal">The "extra day" is to make sure that if you do it at 9am on the 1st of the month prior, you (hopefully unambiguously) have until midnight of the 1st of the current month, without running afoul<u></u><u></u></li></ul></ul><div><p class="MsoNormal"><u></u> <u></u></p></div></div></div></div></blockquote><p class="MsoNormal"><br>Got it. Do you have any guidance or preference for the offline CA CRLs/OCSP responses? Should that continue to be described in months or move into something more specific?<u></u><u></u></p></div></blockquote><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">Days was/is the suggestion. Months being 30 days or 31 days has the calendrical drift issue. So 367 days = 1 year/12 months. <u></u><u></u></p></div></div></div></blockquote></div></blockquote><p class="MsoNormal"><u></u> <u></u></p></div></blockquote></div></blockquote></div></blockquote></div></div></div></div></blockquote></div>
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