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List:       kmail-devel
Subject:    [Bug 84355] New: SMTP-AUTH: Interop Problem with the "PLAIN"
From:       Lars Uffmann <lu-kdebugs () cachescrubber ! org>
Date:       2004-07-02 9:34:10
Message-ID: 20040702093410.29469.qmail () ktown ! kde ! org
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http://bugs.kde.org/show_bug.cgi?id=84355      
           Summary: SMTP-AUTH: Interop Problem with the "PLAIN" Auth-Mech
                    (RFC2595)
           Product: kmail
           Version: unspecified
          Platform: unspecified
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: kmail-devel kde org
        ReportedBy: lu-kdebugs cachescrubber org


Version:           KMail 1.6.2 (using KDE KDE 3.2.3)
Installed from:    I Don't Know

RFC2595 (TLS/PLAIN Auth-mech) and SASL in general use the concept of an authorization \
id vs. authentication id.

initial authentication data for PLAIN is:

> > > RFC2595
message = [authorize-id] NUL authenticate-id NUL password

The client sends the authorization identity (identity to
   login as), followed by a US-ASCII NUL character, followed by the
   authentication identity (identity whose password will be used),
   followed by a US-ASCII NUL character, followed by the clear-text
   password.

The client may leave the authorization identity empty to
   indicate that it is the same as the authentication identity.
<<<

KMail (>=1.6.2) sends:

username NUL username NUL password

which seems OK when reading rfc2595.

However, some Servers behave different if the authorization identity is not NUL. So \
it might be better for interoperability to just issue

NUL username NUL password

when no proxy authorization is requested.
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