[Servercert-wg] Ballot SC18 version 1: Phone Contact with DNS CAA Phone Contact

[Doug Beattie]

Updates from last version: Added link for redlined changes and reset review
period.

 

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Ballot SC18: Phone Contact with DNS CAA Phone Contact

Purpose of Ballot: This ballot will permit domain owners to publish phone
numbers in a DNS CAA record for the purposes of performing domain
validation.

The following motion has been proposed by Doug Beattie of GlobalSign and
endorsed Tim Hollebeek of DigiCert and Bruce Morton from Entrust.

--- MOTION BEGINS ---

This ballot modifies the "Baseline Requirements for the Issuance and
Management of Publicly-Trusted Certificates" as follows, based on Version
1.6.4. 

 

Add the following definition to section 1.6.1:

DNS CAA Phone Contact: The phone number defined in section B.1.2.

 

Add Section 3.2.2.4.17 as follows:

3.2.2.4.17 Phone Contact with DNS CAA Phone Contact 

Confirm the Applicant's control over the FQDN by calling the DNS CAA Phone
Contact's phone number and obtain a confirming response to validate the ADN.
Each phone call MAY confirm control of multiple ADNs provided that the same
DNS CAA Phone Contact phone number is listed for each ADN being verified and
they provide a confirming response for each ADN. The relevant CAA Resource
Record Set MUST be found using the search algorithm defined in RFC 6844
Section 4, as amended by Errata 5065 (Appendix A).

The CA MAY NOT be transferred or request to be transferred as this phone
number has been specifically listed for the purposes of Domain Validation.


In the event of reaching voicemail, the CA may leave the Random Value and
the ADN(s) being validated.  The Random Value MUST be returned to the CA to
approve the request.

The Random Value SHALL remain valid for use in a confirming response for no
more than 30 days from its creation. The CPS MAY specify a shorter validity
period for Random Values.  

Note: Once the FQDN has been validated using this method, the CA MAY also
issue Certificates for other FQDNs that end with all the labels of the
validated FQDN.  This method is suitable for validating Wildcard Domain
Names.

 

Add appendix section B.1.2 as follows:

B.1.2. CAA contactphone Property

SYNTAX: contactemail <rfc3966 Global Number> 

The CAA contactphone property takes a phone number as its parameter.  The
entire parameter value of the MUST be a valid Global Number as defined in
RFC 3966 section 5.1.4, or it cannot be used.  Global Numbers MUST have a
preceding + and a country code and MAY contain visual separators.

The following is an example where the holder of the domain specified the
contact property using a phone number.

$ORIGIN example.com.

    CAA 0 contactphone "+1 (555) 123-4567"

The contactphone property MAY be critical if the domain owner does not want
CAs who do not understand it to issue certificates for the domain.

--- MOTION ENDS ---

 

*** WARNING ***: USE AT YOUR OWN RISK.  THE REDLINE BELOW IS NOT THE
OFFICIAL VERSION OF THE CHANGES (CABF Bylaws, Section 2.4(a)):

 

A comparison of the changes can be found at: 

https://github.com/dougbeattie/documents/compare/master...dougbeattie:SC18-v
1-CAA-Phone-Validation

 

The procedure for approval of this ballot is as follows:

 

Discussion (7+ days)

 

Start Time: 2019-04-12   8:30 Eastern

End Time: Not before 2018-04-19   8:30 Eastern

 

Vote for approval (7 days)

 

Start Time: TBD

End Time: TBD

 

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