---
name: "Lemonldap::NG::Portal::Auth"
section: "3pm"
platform: "linux"
package: "liblemonldap-ng-portal-perl"
version: "2.21.2+ds-1+deb13u3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/Lemonldap::NG::Portal::Auth"
---

# Lemonldap::NG::Portal::Auth(3pm)

Writing authentication modules for LemonLDAP::NG.

## NAME

Lemonldap:NG::Portal::Auth - Writing authentication modules for LemonLDAP::NG.

## SYNOPSIS

```
  package Lemonldap::NG::Portal::Auth::My;

  use strict;
  use Mouse;
  # Add constants used by this module
  use Lemonldap::NG::Portal::Main::Constants qw(PE_OK);

  our $VERSION = '0.1';

  # Directive provides by Mouse
  extends 'Lemonldap::NG::Portal::Main::Auth';
  sub init {
      ...
  }

  sub extractFormInfo {
      my ( $self, $req ) = @_;
      ...
  }

  sub authenticate {
      my ( $self, $req ) = @_;
      ...
  }

  sub setAuthSessionInfo {
      my ( $self, $req ) = @_;
      ...
  }

  sub authLogout {
      my ( $self, $req ) = @_;
      ...
  }

  sub getDisplayType {
      return ...;
  }

  1;
```

## DESCRIPTION

Lemonldap::NG::Portal::Main::Auth must be used to build Lemonldap::NG authentication modules. Authentication modules are independent objects that are instantiated by Lemonldap::NG portal. They must provide methods described below.

## METHODS

### Accessors and methods provided by Lemonldap::NG::Portal::Main::Auth

- p: portal object

  - conf: configuration hash (as reference)

  - logger alias for p-\>logger accessor

  - userLogger alias for p-\>userLogger accessor

  - error: alias for p-\>error method

  - authnLevel: Lemonldap::NG authentication level

  *"Routes" management*

Like each module that inherits from Lemonldap::NG::Portal::Plugin, Lemonldap::NG::Portal::Main::Auth provides URI path functions:

- addAuthRoute: wrapper to Lemonldap::NG::Handler::PSGI::Try **addAuthRoute()** method

  - addUnauthRoute: wrapper to Lemonldap::NG::Handler::PSGI::Try **addUnauthRoute()** method

  Example:

```
  sub init {
      ...
      $self->addAuthRoute( saml => { proxy => "proxySub" }, [ 'GET', 'POST' ] );
      ...
  }
  sub proxySub {
      my ( $self, $req ) = @_;
      ...
      # This sub must return a PSGI response. Example
      return [ 302, [ Location => 'http://x.y/' ], [] ];
  }
```

This means that requests http://auth.../saml/proxy will be given to **proxySub()** method.

### Methods that must be provided by an authentication module

***init()***

Method launched after object creation (after each configuration reload). It must return a true value if authentication module is ready, false else.

*Methods called at each request*

All these methods must return a Lemonldap::NG::Portal::Main::Constants value. They are called with one argument: a Lemonldap::NG::Portal::Main::Request object.

Note: if you want to change **process()** next steps, you just have to change `$req`-\>steps array.

extractFormInfo($req)

First authentication method called during authentication process. It must set `$req`-\>user that will be used by the userDB object to get user information.

authenticate($req)

Last method called during authentication process.

setAuthSessionInfo($req)

Method that must at least set `$req`-\>{sessionInfo}-\>{authenticationLevel} to an integer that indicates the strong of authentication.

Proposed levels:

- 1: low level

  - 2: web form level

  - 3: session based level (Kerberos for example)

  - 5: strong authentication

  authForce($req)

authLogout($req)

## LOGGING

Logging is provided by `$self`-\>logger and `$self`-\>userLogger. The following rules must be applied:

- logger-\>debug: technical debugging messages

  - logger-\>info: simple technical information

  - logger-\>notice: technical information that could interest administrators

  - logger-\>warn: technical warning

  - logger-\>error: error that must be reported to administrator

  - userLogger-\>info: simple information about user's action

  - userLogger-\>notice: information that may be registered (auth success,...)

  - userLogger-\>warn: bad action of a user (auth failure). Auth/Combination transform it to "info" when another authentication scheme is available

  - userLogger-\>error: bad action of a user that must be reported, (even if another backend is available with Combination)

  ## AUTHORS

- LemonLDAP::NG team \<http://lemonldap-ng.org/team\>

  ## BUG REPORT

Use OW2 system to report bug or ask for features: \<https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/issues\>

## DOWNLOAD

Lemonldap::NG is available at \<https://lemonldap-ng.org/download\>

## COPYRIGHT AND LICENSE

See COPYING file for details.

This library is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program.  If not, see \<http://www.gnu.org/licenses/\>.