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PHP VOOT group provider

This project is a stand-alone VOOT group provider. The VOOT specification is implemented.

Features

  • HTTP Basic Authentication
  • PDO storage backend for VOOT data
  • LDAP backend for VOOT data

Requirements

If you want to have LDAP support you need to have the PHP LDAP extension installed, yum install php-ldap (Fedora) or apt-get install php5-ldap (Debian). If you want to have database support you need to have the PDO extension and the relevant platform drivers installed, yum install php-pdo (Fedora) or apt-get install php5-sqlite (Debian).

Installation

We assume you want to install in /var/www/html/php-voot-provider and that you want to access the service through http://localhost/php-voot-provider. In real deployments you of course want to use a TLS certificate.

Below are instructions to install a release or from Git. They assume you have root permissions, but of course you can also create a directory under your web server directory root with user writable permissions and run the commands as a normal user.

From Git

You need Composer to install the dependencies.

# cd /var/www/html
# git clone https://github.com/fkooman/php-voot-provider.git
# cd php-voot-provider
# php /path/to/composer.phar install

Now you can copy the default configuration file in config/voot.ini.defaults to config/voot.ini and modify it for your setup. The various configuration fields are explained. If you configure LDAP you do not need to do anything else, for the database setup see the instructions below. If you use a system with SELinux you may need to give it permission to connect to LDAP servers:

# setsebool -P httpd_can_connect_ldap=on

From Release

If you download a release you do not need to run Composer yourself as all the dependencies are already included. You can just extract the release in /var/www/html/php-voot-provider and continue.

Apache

You need to install a little Apache configuration snippet to point to the web directory inside php-voot-provider as that is where the script that provides the REST service is located.

Alias /php-voot-provider /var/www/html/php-voot-provider/web/voot.php

<Directory "/var/www/html/php-voot-provider/web">
    AllowOverride None
    Options None
</Directory>

You can place this in /etc/httpd/conf.d/php-voot-provider.conf on Fedora, or /etc/apache2/conf.d/php-voot-provider.conf on Debian.

Configuration

You can configure both a database or a LDAP as a backend.

Database

The database schema can be found in schema/db.sql. Import this into your database. SQlite3 and MySQL were tested.

You can add some additional users for testing using:

# php bin/addUsers.php

This will add some users and groups and membership information to the database. Make sure your web server can read this file. It is assumed that your database connection is setup correctly in config/voot.ini.

LDAP

It is possible to use an LDAP server as backend to retrieve group membership. It depends on your LDAP server configuration how to configure this. It is always helpful to start out with some ldapsearch commands to see what will work for your setup. Below is an example based on searching for uid:

$ ldapsearch -x -H ldap://localhost -b "ou=People,dc=example,dc=org" "(uid=fkooman)" dn

This will retrieve the distinguishedName (DN) of that entry which can then in turn be used to query for the users's groups:

$ ldapsearch -x -H ldap://localhost -b "ou=Groups,dc=example,dc=org" "(uniqueMember=uid=fkooman,ou=People,dc=example,dc=org)" cn description

This works as well on Microsoft Active Directory servers (it does need a "bind" though in the default configuration):

$ ldapsearch -H ldap://ad.example.org -b "cn=Users,dc=example,dc=org" -D "cn=Administrator,cn=Users,dc=example,dc=org" -w s3cr3t "(samAccountName=fkooman)" dn

Now to fetch the groups for the user:

$ ldapsearch -H ldap://ad.example.org -b "cn=Users,dc=example,dc=org" -D "cn=Administrator,cn=Users,dc=example,dc=org" -w s3cr3t "(member=CN=François Kooman,CN=Users,DC=example,DC=org)" cn description

This can all be configured in config/voot.ini, see the examples there for more information.

Testing User/Group Backend

To test the configuration of your LDAP/Database settings it is possible to use the BackendTest.php script in the bin/ directory. First configure LDAP or the database in config/voot.ini and then run the script like this:

$ php bin/BackendTest.php fkooman

This should return an array with the group information. If it does not work, make sure you match the configuration values with the ldapsearch commands that do work.

Testing REST API

You can then try to use the REST API with e.g. cURL:

$ curl http://localhost/php-voot-provider/groups/fkooman

This should return some JSON data with the group membership information. For querying group members you can use the following call:

$ curl http://localhost/php-voot-provider/people/fkooman/members

License

Licensed under the Apache License, Version 2.0;

http://www.apache.org/licenses/LICENSE-2.0

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