Mojolicious::Plugin::GSSAPI - Provide Kerberos authentication.


 use Mojolicious::Lite;

 plugin 'GSSAPI';

 get '/' => sub ($c) {
    my $user = $c->gssapi_auth or return;
    $c->render(text=>'hello '.$user);


The `Mojolicious::Plugin::GSSAPI` plugin lets you use kerberos authentication in your mojo app. The plugin uses the GSSAPI module for the heavy lifting.

If you want to use kerberos to SSO in a webproxy, use the web_proxy_mode option:

 plugin 'GSSAPI',web_proxy_mode => 1;

The included example script shows how to use the plugin to implement Kerberos SSO authentication for a Mojolicious::Lite web application.

If your machine is not yet part of the AD Domain, get it added to the ad server especially the dns entry including reveres lookup is important.

Then, make sure the /etc/resolv.conf or /etc/systemd/resolved.conf points to your ad server.

For some reason it seems best to have the ad server also added to your /etc/hosts file.

Add the ad `realm` to the /etc/krb5.conf file

    default_realm = MY-AD.DOMAIN

Now use the `adcli` tool to join the AD domain and add a `http` service entry.

 adcli join \
    --login-type user \
    --login-user Administrator \
    --domain-controller \
    --service-name http

If you do not have the Administrator password for your AD server, you may also get a 'one-time-password' from your friendly ad admin person to join your machine to the AD domain.

And now about actually testing the plugin:

 $ perl Makefile.PL
 $ make 3rd
 $ sudo ./eg/ deamon

The sudo in the example above is necessary for the app to be able to read information from the /etc/krb5.keytab. You could also provide the demo with a copy of the file and use export KRB5CCNAME=/opt/demo/my.keytab to tell the demo where to find the keytab file.

For your browser todo kerberos sso, you will have to let it know that your test machine is part of the 'realm'. On windows this is done by adding the name of your linux box to "Internet Properties -> Security -> Local intranet -> Sites -> Advanced"


Copyright OETIKER+PARTNER AG 2021. All rights reserved.


This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.


Tobias Oetiker <>


 2021-03-22 to 0.1.0 initial version