On Jul 27, 2005, at 11:28 PM, william(at)elan.net wrote:
On Wed, 27 Jul 2005, Arvel Hathcock wrote:
I should like to ask how querying for TXT records constitutes
"using DNS in an incorrect manner".
TXT was an extra record not really for formal "protocol" use,
basicly a commentary field. Correct way in DNS is to have RR for
specific use.
Section 3.3.14 of RFC 1035 does say:
The semantics of the text depends on the domain where it is found.
Since these TXT records are to be found under _domainkey.domain, I
think this is a reasonable use of TXT.
On a related note, I do not see in dkim_base that multiple character
strings in TXT records are to be concatenated before parsing. This
is not such a big deal, but I don't see any harm in explicitly
specifying it. I was thinking of suggesting that each character
string be treated as a separate tag-list to work around issues with
semicolons, but that would most likely screw up the public key as it
is likely to span more than one character string.
It might be worth adding to Appendix C that some DNS servers will
require the record to be explicitly broken up into multiple character
strings and that simple cutting and pasting of the public key may not
be sufficient.
-andy