[Imap-protocol] example of authentication PLAIN with imap?

[Philip Guenther]

On Fri, 25 Jan 2008, Bill Janssen wrote:
...

> So I believe that a plain authentication challenge should look something

> like this (for valid account with username "janssen", password "foo"):

>

> C: 4 authenticate plain\r\n

> S: +\r\n

> C: AGphbnNzZW4AZm9v\r\n

> S: 4 OK authenticate\r\n

>

> D'accord?


Nope.  You didn't check the syntax for a command continuation request 
response.  On page 84 of RFC 3501 we find:

continue-req    = "+" SP (resp-text / base64) CRLF

I.e., the space after the plus-sign is mandatory, even when the base64 is 
empty.  So make the first server line above:
  S: + \r\n

The rest of that looks correct to me.

As a side-note, the server should consider including in the tagged OK 
response to AUTHENTICATE a CAPABILITY response code that lists the 
capaibilities that are useful after authentication.  e.g.,

  S: 4 OK [CAPABILITY IMAP4rev1 IDLE MULTIAPPEND X-MOTTO] Authentication succeeded\r\n

(c.f. section 6.2.2p9 for details and when not bother)


Philip Guenther