[Top] [All Lists]

Re: [ietf-dkim] [Editorial Errata Reported] RFC6376 (5260)

2018-02-08 12:07:54

Our respective ages are getting up there and my senility is setting in in earnest, so I have some sympathy along these lines, but given that you are the author of RFC 5234, you might want to check section 2.3 of that document:

   ABNF permits the specification of literal text strings directly,
   enclosed in quotation marks.  Hence:

         command     =  "command string"

   Literal text strings are interpreted as a concatenated set of
   printable characters.


      ABNF strings are case insensitive and the character set for these
      strings is US-ASCII.


         rulename = "abc"


         rulename = "aBc"

   will match "abc", "Abc", "aBc", "abC", "ABc", "aBC", "AbC", and

      To specify a rule that is case sensitive, specify the characters

RFC 7405 is also useful along these lines.

So, no error in 5322. As for the erratum below, not having ABNF for the header field does seem like a miss, though I'm not sure it should be marked as more than "Hold for document update".

Pete Resnick <>
Qualcomm Technologies, Inc. - +1 (858)651-4478

On 8 Feb 2018, at 9:30, Dave Crocker wrote:

While possibly a nice addition to the specification, including this ABNF rule does not correct an error in RFC 6376.

As for header-field name case sensitivity, that is the purview of RFC 5322, not RFC 6376.

(FWIW, it does appear that there is an error in RFC 5322, since it does not enforce case insensitity in the syntax, although it specifies -- and intends -- it in the prose.)


The following errata report has been submitted for RFC6376,
"DomainKeys Identified Mail (DKIM) Signatures".

You may review the report below and at:

Type: Editorial
Reported by: Ale <vesely(_at_)tana(_dot_)it>

Section: 3.5

Original Text

Corrected Text
DKIM-Signature = "DKIM-Signature:" tag-list

A formal definition is needed to make it explicit that this header field name is case insensitive, like all the other header field names.

This erratum is currently posted as "Reported". If necessary, please
use "Reply All" to discuss whether it should be verified or
rejected. When a decision is reached, the verifying party
can log in to change the status and edit the report, if necessary.

RFC6376 (draft-ietf-dkim-rfc4871bis-15)
Title               : DomainKeys Identified Mail (DKIM) Signatures
Publication Date    : September 2011
Author(s) : D. Crocker, Ed., T. Hansen, Ed., M. Kucherawy, Ed.
Category            : DRAFT STANDARD
Source              : Domain Keys Identified Mail
Area                : Security
Stream              : IETF
Verifying Party     : IESG

Dave Crocker
Brandenburg InternetWorking
NOTE WELL: This list operates according to