On Sun, Feb 22, 2015 at 07:58:19PM -0800, Jim Schaad wrote:
> I am on a case sensitive receiving domain.
> There are two recipients - JimSch and jimsch on the domain.
> jimsch has a record but JimSch does not.
> I now try and send mail to JimSch but get a key for jimsch.
You forgot to hash the tag with the case-folded name.
Speaking of which, IIRC neither the OPENPGPKEY nor the SMIMEA draft
explicitly mentions what to do about quoted localparts:
"Sam.Jr."@example.com
The localpart is not a dot-atom, and thus requires double-quotes.
My contention is that in this case the input to SHA2-224 MUST
include the quotes:
SHA2-224("Sam.Jr.")
not
SHA2-224("Sam.Jr.")
In this case the simplest tagging scheme is:
JimSch - unfolded hash input
jimsch@lowercase - folded hash input
any email address of the form:
"jimsch@lowercase"@example.com
would be hashed together with the quotes!
I don't have a pointer to my original proposal handy,
check the archives. It is something along these lines.
--
Viktor.
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