So, da bin ich nochmal. In der Zwischenzeit habe ich einen Wink in die
richtige Richtung bekommen. Wir haben das uns überlassene Script ein
wenig modifiziert. Es gibt nun im Verzeichnis
/Kernel/System/CustomerAuth ein neues Perl Modul, welches folgenden
Aufbau hat:

# --
# Kernel/System/CustomerAuth/XYZAuth.pm - provides the single sign on
# Copyright (C) 2001-2004 Martin Edenhofer <[EMAIL PROTECTED]>
# --
# $Id: HTTPBasicAuth.pm,v 1.2 2004/08/10 10:31:56 martin Exp $
# --
# This software comes with ABSOLUTELY NO WARRANTY. For details, see
# the enclosed file COPYING for license information (GPL). If you
# did not receive this file, see http://www.gnu.org/licenses/gpl.txt.
# --

package Kernel::System::CustomerAuth::XYZAuth;

use strict;
use DBI;

use vars qw($VERSION);
$VERSION = '$Revision: 1.2 $';
$VERSION =~ s/^\$.*:\W(.*)\W.+?$/$1/;

# --
sub new {
    my $Type = shift;
    my %Param = @_;

    # allocate new hash for object
    my $Self = {};
    bless ($Self, $Type);

    # check needed objects
    foreach (qw(LogObject ConfigObject DBObject)) {
        $Self->{$_} = $Param{$_} || die "No $_!";
    }

    # Debug 0=off 1=on
    $Self->{Debug} = 0;
    $Self->{Type} =
$Self->{ConfigObject}->Get('Customer::AuthModule::XYZAuth::Type');

    # Im Moment wird nur MySQL unterstützt
    if ($Self->{Type} ne 'mysql')
    {
        $Self->{Type} = 'mysql';
    }

    $Self->{Host} =
$Self->{ConfigObject}->Get('Customer::AuthModule::XYZAuth::Host');
    $Self->{Port} =
$Self->{ConfigObject}->Get('Customer::AuthModule::XYZAuth::Port');

    if ($Self->{Port} eq '')
    {
        $Self->{Port} = 3306;
    }

    $Self->{Database} =
$Self->{ConfigObject}->Get('Customer::AuthModule::XYZAuth::Database');
    $Self->{User} =
$Self->{ConfigObject}->Get('Customer::AuthModule::XYZAuth::User');
    $Self->{Password} =
$Self->{ConfigObject}->Get('Customer::AuthModule::XYZAuth::Password');

    $Self->{DSN} =
"DBI:".$Self->{Type}.":database=".$Self->{Database}.":host=".$Self->{Hos
t}.":port=".$Self->{Port};

    return $Self;
}
# --
sub GetOption {
    my $Self = shift;
    my %Param = @_;
    # check needed stuff
    if (!$Param{What}) {
        $Self->{LogObject}->Log(Priority => 'error', Message => "Need
What!");
        return;
    }
    # module options
    my %Option = (
        PreAuth => 1,
    );
    # return option
    return $Option{$Param{What}};
}
# --
sub Auth {
    my $Self = shift;
    my %Param = @_;
    my $sth;
    my $dbh;
    my $sql;
    my @row;
    my $ValidUser;
    my $RemoteAddr = $ENV{REMOTE_ADDR} || 'Got no REMOTE_ADDR env!';
    # check needed stuff
    if (!$Param{sid}) {
        $Self->{LogObject}->Log(Priority => 'error', Message => "Need
Session ID!");
        return;
    }
    # do some lookups in other sources

    # Sitzungsschlüssel analysieren und in DB den eingeloggten LDAP-User
holen

    if ($dbh = DBI->connect($Self->{DSN}, $Self->{User},
$Self->{Password}))
    {
        $sql    =       "SELECT user FROM session_data WHERE
sid='".$Param{sid}."'";
        $sth    =       $dbh->prepare($sql);

        if ($sth->execute())
        {
            if (@row = $sth->fetchrow_array())
            {
                $ValidUser = $row[0];
            }
            else
            {
                $ValidUser = '';
            }
        }
        else
        {
            $ValidUser = 'ERROR';
        }
    }
    else
    {
        $ValidUser = 'ERROR';
    }

    # return valid user
    if ($ValidUser eq 'ERROR')
    {
        $Self->{LogObject}->Log(
            Priority => 'notice',
            Message => "User: Database error while
authenticating!(REMOTE_ADDR: $RemoteAddr).",
        );
        return;
    }
    elsif ($ValidUser)
    {
        my $User = $ValidUser;
        $Self->{LogObject}->Log(
            Priority => 'notice',
            Message => "User: $ValidUser authentification ok
(REMOTE_ADDR: $RemoteAddr).",
        );
        return $ValidUser;
    }
    else
    {
        $Self->{LogObject}->Log(
            Priority => 'notice',
            Message => "User: No valid user found!(REMOTE_ADDR:
$RemoteAddr).",
        );
        return;
    }

    if ($dbh)
    {
        $dbh->disconnect();
    }
}
# --

1;

In der Config.pm haben wir dazu folgende Erweiterungen gemacht:

# Customer-Autorisierung über Intranet
$Self->{'Customer::AuthModule'} =
'Kernel::System::CustomerAuth::XYZAuth';
$Self->{'Customer::AuthModule::XYZAuth::Type'} = 'mysql';
$Self->{'Customer::AuthModule::XYZAuth::Host'} = 'localhost';
$Self->{'Customer::AuthModule::XYZAuth::Port'} = '3306';
$Self->{'Customer::AuthModule::XYZAuth::Database'} = 'db';
$Self->{'Customer::AuthModule::XYZAuth::User'} = 'user';
$Self->{'Customer::AuthModule::XYZAuth::Password'} = 'pw';

Die Übergabe des Session-Keys aus dem Intranet erfolgt so:

https://localhost/otrs/customer.pl?sid=2fdfc3ba498b78aa45f627e0e604932b

Allerdings passiert nach der Übergabe der sid folgendes:

if (!$Param{sid}) {
        $Self->{LogObject}->Log(Priority => 'error', Message => "Need
Session ID!");
        return;
    }

sid ist trotz des URL-Parameters leer. Es kann als auch kein User in
unserer MySQL-DB gesucht werden. Hat jemand eine Idee, warum OTRS nichts
von der sid weiß?

Viele Grüße

Stéphane Martin
WebTrio GmbH

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