dovecot - Jul 2012 - authenticate plain and utf-8 with special chars

Hi,

I experienced some problems with authenticate. 

seems like the mail clients like thunderbird send their base64 string in
ISO- encoding, which doesnt work on my dovecot setup if there are some
Umlauts

I am not able to login as 
 "?mer" for example


If I authenticate from telnet with an base64 encoded utf-8 string like
 'echo -en "\0?mer\0Start12" |base64'
everything works fine


-dovecot 2.1.7
-userdb is an openldap which queries an windows AD so results are in
utf8, I think.

any clues at which point to fix this are welcome ;)

On 2012-07-31, at 5.42, Matthias Lay <matthias.lay at securepoint.de>
wrote:
> seems like the mail clients like thunderbird send their base64 string in
> ISO- encoding, which doesnt work on my dovecot setup if there are some
> Umlauts
> 
> I am not able to login as 
> "?mer" for example
> 
> If I authenticate from telnet with an base64 encoded utf-8 string like
> 'echo -en "\0?mer\0Start12" |base64'
> everything works fine
This looks like a Thunderbird bug. SASL PLAIN uses UTF-8, not ISO-8859; see RFC
4616.

Thunderbird's bug #312593 relates to password handling, but it sounds like
there's a similar issue affecting usernames. See
https://bugzilla.mozilla.org/show_bug.cgi?id=312593. It might be worth adding a
comment there.

-- 

Matthew Powell                                          matthew at atom.net