[cabfpub] Ballot 190: Domain Validation

Jeremy Rowley jeremy.rowley at digicert.com
Mon Apr 3 20:13:53 MST 2017


This is the revised domain validation ballot based on the feedback received
at and after the face to face. Looking for either additional comments or two
endorsers.

Jeremy

-----

Revised Validation Requirements

Purpose of Ballot: The purpose of this ballot is to 1) re-introduce the
methods removed in ballot 180-182 because of IPR concerns, 2) clarify some
issues with the .well-known method, 3) specify how the reuse of information
works with respect to the newly adopted methods, and 4) clarify how the
reuse of information works with respect to the amendment to BR 4.2.1.

The following motion has been proposed by Jeremy Rowley of DigiCert and
endorsed by the following CA/B Forum member representatives: Entrust
Datacard and YYYY to introduce new Final Maintenance Guidelines for the
"Baseline Requirements Certificate Policy for the Issuance and Management of
Publicly-Trusted Certificates" (Baseline Requirements).

--Motion Begins--

Ballot Section 1

1) Replace Section 3.2.2.4.1:

3.2.2.4.1 Validating the Applicant as a Domain Contact

Confirming the Applicant's control over the FQDN by validating the Applicant
is the Domain Contact directly with the Domain Name Registrar. This method
may only be used if:

1.	The CA authenticates the Applicant's identity under BR Section
3.2.2.1 and the authority of the Applicant Representative under BR Section
3.2.5, OR
2.	The CA authenticates the Applicant's identity under EV Guidelines
Section 11.2 and the agency of the Certificate Approver under EV Guidelines
Section 11.8; OR
3.	The CA is also the Domain Name Registrar, or an Affiliate of the
Registrar, of the Base Domain Name.

2) Replace Section 3.2.2.4.2:

3.2.2.4.2 Email, Fax, SMS, or Postal Mail to Domain Contact

Confirming the Applicant's control over the FQDN by sending a Random Value
via email, fax, SMS, or postal mail and then receiving a confirming response
utilizing the Random Value. The Random Value MUST be sent to an email
address, fax/SMS number, or postal mail address identified as a Domain
Contact.

Each email, fax, SMS, or postal mail MAY confirm control of multiple
Authorization Domain Names.

The CA or Delegated Third Party MAY send the email, fax, SMS, or postal mail
identified under this section to more than one recipient provided that every
recipient is identified by the Domain Name Registrar as representing the
Domain Name Registrant for every FQDN being verified using the email, fax,
SMS, or postal mail.

The Random Value SHALL be unique in each email, fax, SMS, or postal mail.

The CA or Delegated Third Party MAY resend the email, fax, SMS, or postal
mail in its entirety, including re-use of the Random Value, provided that
the communication's entire contents and recipient(s) remain unchanged.

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, in which case the CA MUST follow its CPS.

3) Replace Section 3.2.2.4.3:

3.2.2.4.3 Phone Contact with Domain Contact

Confirming the Applicant's control over the requested FQDN by calling the
Domain Name Registrant's phone number and obtaining a response confirming
the Applicant's request for validation of the FQDN. The CA or Delegated
Third Party MUST place the call to a phone number identified by the Domain
Name Registrar as the Domain Contact.

Each phone call SHALL be made to a single number and MAY confirm control of
multiple FQDNs, provided that the phone number is identified by the Domain
Registrar as a valid contact method for every Base Domain Name being
verified using the phone call.

4) Replace Section 3.2.2.4.4:

3.2.2.4.4 Constructed Email to Domain Contact

Confirm the Applicant's control over the requested FQDN by (i) sending an
email to one or more addresses created by using 'admin', 'administrator',
'webmaster', 'hostmaster', or 'postmaster' as the local part, followed by
the at-sign ("@"), followed by an Authorization Domain Name, (ii) including
a Random Value in the email, and (iii) receiving a confirming response
utilizing the Random Value.

Each email MAY confirm control of multiple FQDNs, provided the Authorization
Domain Name used in the email is an Authorization Domain Name for each FQDN
being confirmed

The Random Value SHALL be unique in each email.

The email MAY be re-sent in its entirety, including the re-use of the Random
Value, provided that its entire contents and recipient SHALL remain
unchanged.

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, in which case the CA.

5) Edit Section 3.2.2.4.6:

3.2.2.4.6 Agreed-Upon Change to Website

Confirming the Applicant's control over the requested FQDN by confirming the
presence of a Request Token or Random Value contained in the content of a
file or on a web page in the form of a meta tag one of the following under
the "/.well‐known/pki‐validation" directory, or another path registered
with IANA for the purpose of Domain Validation, on the Authorization Domain
Name that is accessible by the CA via HTTP/HTTPS over an Authorized Port.
The Request Token or Random Value MUST NOT appear in the request for the
file or web-page.  :

1. The presence of Required Website Content contained in the content of a
file or on a web page in the form of a meta tag. The entire Required Website
Content MUST NOT appear in the request used to retrieve the file or web
page, or

2. The presence of the Request Token or Request Value contained in the
content of a file or on a webpage in the form of a meta tag where the
Request Token or Random Value MUST NOT appear in the request.

If a Random Value is used, the CA or Delegated Third Party SHALL provide a
Random Value unique to the certificate request and SHALL not use the Random
Value after the longer of (i) 30 days or (ii) if the Applicant submitted the
certificate request, the timeframe permitted for reuse of validated
information relevant to the certificate (such as in Section 3.3.1 of these
Guidelines or Section 11.14.3 of the EV Guidelines).

Note: Examples of Request Tokens include, but are not limited to: (i) a hash
of the public key; (ii) a hash of the Subject Public Key Info [X.509]; and
(iii) a hash of a PKCS#10 CSR. A Request Token may also be concatenated with
a timestamp or other data. If a CA wanted to always use a hash of a PKCS#10
CSR as a Request Token and did not want to incorporate a timestamp and did
want to allow certificate key re‐use then the applicant might use the
challenge password in the creation of a CSR with OpenSSL to ensure
uniqueness even if the subject and key are identical between subsequent
requests. This simplistic shell command produces a Request Token which has a
timestamp and a hash of a CSR. E.g. echo `date -u +%Y%m%d%H%M` `sha256sum
<r2.csr` | sed "s/[ -]//g". The script
outputs:201602251811c9c863405fe7675a3988b97664ea6baf442019e4e52fa335f406f7c5
f26cf14f

The CA should define in its CPS (or in a document referenced from the CPS)
the format of Request Tokens it accepts.

6) Add Section 3.2.2.4.7:

3.2.2.4.7 DNS Change

Confirming the Applicant's control over the requested FQDN by confirming the
presence of a Random Value or Request Token in a DNS CNAME, TXT, or CAA
record for an Authorization Domain Name or an Authorization Domain Name that
is prefixed with a label that begins with an underscore character.

If a Random Value is used, the CA or Delegated Third Party SHALL provide a
Random Value unique to the certificate request and SHALL not use the Random
Value after (i) 30 days or (ii) if the Applicant submitted the certificate
request, the timeframe permitted for reuse of validated information relevant
to the certificate (such as in Section 3.3.1 of these Guidelines or Section
11.14.3 of the EV Guidelines).

7) Add Section 3.2.2.4.8:

3.2.2.4.8 IP Address

Confirming the Applicant's control over the requested FQDN by confirming
that the Applicant controls an IP address returned from a DNS lookup for A
or AAAA records for the FQDN in accordance with section 3.2.2.5.

8) Add Section 3.2.2.4.9:

3.2.2.4.9 Test Certificate

Confirming the Applicant's control over the requested FQDN by confirming the
presence of a non‐expired Test Certificate issued by the CA on the
Authorization Domain Name and which is accessible by the CA via TLS over an
Authorized Port for the purpose of issuing a Certificate with the same
Public Key as in the Test Certificate.

9) Delete Section 3.2.2.4.11

10) Delete the definition of “Required Website Content”

11) Replace the reference to Section 3.3.1 with a reference to Section 4.2.1
in the third paragraph under Section 3.2.2.4.

12) Revised the definition of “Authorized Ports” as follows:

One of the following ports: 80 (http), 443 (http), 115 (sftp), 25 (smtp), 22
(ssh).

13) Revise the definition of Test Certificate as follows:

Test Certificate: A Certificate with a maximum validity period of 30 days
and which: (i) includes a critical extension with the specified Test
Certificate CABF OID (2.23.140.2.1), or (ii) is issued under a CA where
there are no certificate paths/chains to a root certificate subject to these
Requirements

Ballot Section 2

This provisions of Ballot Section 1 will apply only to the validation of
domain names occurring after this Ballot 190’s effective date.  Validation
of domain names that occurs before this Ballot’s effective date and the
resulting validation data may continue to be used for the periods specified
in BR 4.2.1 and EVGL 11.14.3 so long as the validations were conducted in
compliance with the BR Section 3.2.2.4 validation methods in effect at the
time of each validation.

--Motion Ends--

The procedure for approval of this Final Maintenance Guideline ballot is as
follows (exact start and end times may be adjusted to comply with applicable
Bylaws and IPR Agreement):




BALLOT 190

Status: Final Maintenance Guideline

Start time (23:00 UTC)

End time (23:00 UTC)


Discussion (7 to 14 days)






Vote for approval (7 days)






If vote approves ballot: Review Period (Chair to send Review Notice) (30
days).

If Exclusion Notice(s) filed, ballot approval is rescinded and PAG to be
created.

If no Exclusion Notices filed, ballot becomes effective at end of Review
Period.

Upon filing of Review Notice by Chair

30 days after filing of Review Notice by Chair



>From Bylaw 2.3: If the Draft Guideline Ballot is proposing a Final
Maintenance Guideline, such ballot will include a redline or comparison
showing the set of changes from the Final Guideline section(s) intended to
become a Final Maintenance Guideline, and need not include a copy of the
full set of guidelines.  Such redline or comparison shall be made against
the Final Guideline section(s) as they exist at the time a ballot is
proposed, and need not take into consideration other ballots that may be
proposed subsequently, except as provided in Bylaw Section 2.3(j).



Votes must be cast by posting an on-list reply to this thread on the Public
list.  A vote in favor of the motion must indicate a clear 'yes' in the
response. A vote against must indicate a clear 'no' in the response. A vote
to abstain must indicate a clear 'abstain' in the response. Unclear
responses will not be counted. The latest vote received from any
representative of a voting member before the close of the voting period will
be counted. Voting members are listed here:  <https://cabforum.org/members/>
https://cabforum.org/members/



In order for the motion to be adopted, two thirds or more of the votes cast
by members in the CA category and greater than 50% of the votes cast by
members in the browser category must be in favor.  Quorum is shown on
CA/Browser Forum wiki.  Under Bylaw 2.2(g), at least the required quorum
number must participate in the ballot for the ballot to be valid, either by
voting in favor, voting against, or abstaining.










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