[Dovecot] problems with auth protocol

[Timo Sirainen]

On Sep 27, 2008, at 12:17 AM, Giorgenes Gelatti wrote:

> I have a client connecting to dovecot and comunicating like this:
>
> * OK Dovecot ready.
>
> * AUTHENTICATE MYAUTH
> + base64 challange
> base64_response {NNN}
>
> * NO Invalid base64 data in continued response
>
>
> The problem is that dovecot seems to reject the response because of
> the {NNN} in the end of the string.
> If I remove the {NNN} it authenticates just fine.
>
> Any idea of whether it's standard or not?

What is the {NNN}? I've never seen that before and it's definitely  
against RFC 3501:

> The client response consists of a single line consisting of a BASE64
> encoded string.  If the client wishes to cancel an authentication  
> exchange,
> it issues a line consisting of a single "*".
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