Re: Problems with IMAP4S LOGIN command

Am 09.07.2009 13:48, schrieb Simon Horman:

> On Thu, Jul 02, 2009 at 03:10:39PM +0200, TOPdesk Systeembeheer ([email protected]) wrote:
>> Hi everybody,
>>
>> Since an upgrade to our backend IMAPS server (Zarafa 6.20.7), we have some trouble authenticating via our perdition IMAP4S proxy (version 1.17-7etch1). I've enabled debug and connection logging, and I see that the LOGIN command is splitted in 3 lines instead of sending the whole command in one. Is that normal? Can I configure it somewhere?
> 
> Hi,
> 
> Sorry for the delay, I have been away.
> 
> its a while since I wrote that section of the code, so forgive me if I am a
> little lose with the terminology surrounding it. The IMAP specification
> allows for two different login formats. A simple one-line format. And a
> slightly more complex multi-line format. The advantage of the latter being
> that it can cope with any character in the username and password, as
> opposed to the simple format which, for instance, doesn't allow for spaces
> in the username.
> 
> For this reason perdition always uses the more complex format when talking
> to real servers - it saves having to detect if the short format can be used
> or not. Unfortunately it seems that your IMAP daemon doesn't support this
> format (as indeed early versions of perdition did not).
> 
> Are you in a position to modify the perdition code?  If so, it would be
> good to see if changing to the short-format resolves your problem.  The
> relevant code is in imap4_out_authenticate() in perdition/imap4_out.c
> 
> If that works, I guess it would be good to provide an option to tell
> perdition to use the short format - and perhaps return and appropriate
> error if the username and login supplied can't use the short format.
> 
> Alternatively, if my diagnosis is correct, it might be good
> to get this fixed in your IMAP daemon.

Dear Simon,

today I crossed the exact same problem using perdition as a DMZ proxy in
front of a Zarafa gateway IMAP server.

Can you tell us to which RFC you are refering? In RFC3501 for IMAP
version 4rev1 I see just the "<prefix> login username password" syntax.
Especially 6.2.3. is about the LOGIN command.

I am willing to make an RFE against Zarafa if I can point to an RFC.
Though I think RFC3501 is still the standard and perdition lacks a
standard IMAP login method from that point of view.

Best regards

Alexander

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