13. Application Plugins

privacyIDEA comes with application plugins. These are plugins for applications like PAM, OTRS, Apache2, FreeRADIUS, ownCloud or simpleSAMLphp which enable these application to authenticate users against privacyIDEA.

You may also write your own application plugin or connect your own application to privacyIDEA. This is quite simple using a REST API Validate endpoints.

13.1. Pluggable Authentication Module

The PAM module of privacyIDEA directly communicates with the privacyIDEA server via the API. The PAM module also supports offline authentication. In this case you need to configure an offline machine application. (See Offline)

You can install the PAM module with a ready made Debian package for Ubuntu or just use the source code file. It is a python module, that requires pam-python.

The configuration could look like this:

... pam_python.so /path/to/privacyidea_pam.py
url=https://localhost prompt=privacyIDEA_Authentication

The URL parameter defaults to https://localhost. You can also add the parameters realm= and debug.

If you want to disable certificate validation, which you should not do in a productive environment, you can use the parameter nosslverify.

A new parameter cacerts= lets you define a CA Cert-Bundle file, that contains the trusted certificate authorities in PEM format.

The default behaviour is to trigger an online authentication request. If the request was successful, the user is logged in. If the request was done with a token defined for offline authentication, then in addition all offline information is passed to the client and cached on the client so that the token can be used to authenticate without the privacyIDEA server available.

13.1.1. try_first_pass

Starting with version 2.8 privacyidea_pam supports try_first_pass. In this case the password that exists in the PAM stack will be sent to privacyIDEA. If this password is successfully validated, than the user is logged in without additional requests. If the password is not validated by privacyIDEA, the user is asked for an additional OTP value.

Note

This can be used in conjunction with the passthru policy. In this case users with no tokens will be able to login with only the password in the PAM stack.

Read more about how to use PAM to do OTP with OpenVPN.

13.2. Using pam_yubico

If you are using yubikey tokens you might also use pam_yubico. You can use Yubikey tokens for two more or less distinct applications. The first is using privacyideas PAM module as described above. In this case privacyidea handles the policies for user access and password validation. This works fine, when you only use privacyidea for token validation.

The second mode is using the standard PAM module for yubikeys from Yubico pam_yubico to handle the token validation. The upside ist that you can use the PAM module included with you distribution, but there are downsides as well.

  • You can’t set a token PIN in privacyidea, because pam_yubico tries to use the token PIN entered by the user as a system password (which is likely to fail), i.e. the PIN will be stripped by pam_yubico and will not reach the privacyIDEA system.
  • Setting the policy which tokens are valid for which users is done either in ~/.yubico/authorized_keys or in the file given by the authfile option in the PAM configuration. The api server will only validate the token, but not check any kind of policy.

You can work around the restrictions by using a clever combination of tokentype yubikey and yubico as follows:

  • enroll a yubikey token with yubikey_mass_enroll --mode YUBICO.
  • do not set a token password.
  • do not assign the token to a user.
  • please make a note of yubikey.prefix (12 characters starting with vv).

Now the token can be used with pam_yubico, but will not allow any user access in privacyidea. If you want to use the token with pam_yubico see the manual page for details. You’ll want something like the following in your PAM config:

auth required pam_yubico.so id=<apiid> key=<API key> \
     urllist=https://<privacyidea-server>/ttype/yubikey authfile=/etc/yubikeys/authorized_yubikeys

The file /etc/yubikeys/authorized_yubikeys contains a line for each user with the username and the allowed tokens delimited by ”:”, for example:

<username>:<serial number1>:<prefix1>:<prefix2>

... doc/configuration/tokenconfig, add yubikey.rst to describe how to configure Client ID/apiid and API key

Now create a second token representing the Yubikey, but this time use the Yubico Cloud mode. Go to Tokens -> Enroll Token and select Yubico Cloud mode. Enter the 12 characters prefix you noted above and assign this token to a user and possibly set a token PIN. It would be nice to have the the serial number of the UBCM token correspond to the UBAM token, but this is right now not possible with the WebUI.

In the WebUI, test the UBAM token without a Token PIN, test the UBCM token with the stored Token PIN, and check the token info afterwards. Check the yubikey token via /ttype/yubikey, for example with:

ykclient –debug –url https://<privacyidea>/ttype/yubikey –apikey “<API key>” “apiid” <otp>

There should be successful authentications (count_auth_success), but no failures.

13.3. FreeRADIUS Plugin

If you want to install the FreeRADIUS Plugin on Ubuntu 14.04 LTS this can be easily done, since there is a ready made package (see FreeRADIUS).

If you want to run your FreeRADIUS server on another distribution, you may download the module at [1].

Then you need to configure your FreeRADIUS site and the perl module. The latest FreeRADIUS plugin uses the /validate/check REST API of privacyIDEA.

You need to configure the perl module in FreeRADIUS modules/perl to look something like this:

perl {
    module = /usr/share/privacyidea/freeradius/privacyidea_radius.pm
}

Your freeradius enabled site config should contain something like this:

authenticate {
     Auth-Type Perl {
        perl
     }
     digest
     unix
}

While you define the default authenticate type to be Perl in the users file:

DEFAULT Auth-Type := Perl

Note

The privacyIDEA module uses other perl modules that were not thread safe in the past. So in case you are using old perl dependencies and are experiencing thread problems, please start FreeRADIUS with the -t switch. (Everything works fine with Ubuntu 14.04 and Debian 7.)

You can test the RADIUS setup using a command like this:

echo "User-Name=user, Password=password" | radclient -sx yourRadiusServer \
   auth topsecret

Note

Do not forget to configure the clients.conf accordingly.

Read more about Radius and Realms or RADIUS plugin configuration.

13.4. Microsoft NPS server

You can also use the Microsoft Network Protection Server with privacyIDEA. A full featured integration guide can be found at the NetKnights webpage [6].

13.5. simpleSAMLphp Plugin

You can install the plugin for simpleSAMLphp on Ubuntu 14.04 LTS (see SimpleSAMLphp) or on any other distribution using the source files from [2].

Follow the simpleSAMLphp instructions to configure your authsources.php. A usual configuration will look like this:

'example-privacyidea' => array(
    'privacyidea:privacyidea',

    /*
     * The name of the privacyidea server and the protocol
     * A port can be added by a colon
     * Required.
     */
    'privacyideaserver' => 'https://your.server.com',

    /*
     * Check if the hostname matches the name in the certificate
     * Optional.
     */
    'sslverifyhost' => False,

    /*
     * Check if the certificate is valid, signed by a trusted CA
     * Optional.
     */
    'sslverifypeer' => False,

    /*
     * The realm where the user is located in.
     * Optional.
     */
    'realm' => '',

    /*
     * This is the translation from privacyIDEA attribute names to
     * SAML attribute names.
     */
     'attributemap' => array('username' => 'samlLoginName',
                             'surname' => 'surName',
                             'givenname' => 'givenName',
                             'email' => 'emailAddress',
                             'phone' => 'telePhone',
                             'mobile' => 'mobilePhone',
                             ),
),

13.6. TYPO3

You can install the privacyIDEA extension from the TYPO3 Extension Repository. The privacyIDEA extension is easily configured.

privacyIDEA Server URL

This is the URL of your privacyIDEA installation. You do not need to add the path validate/check. Thus the URL for a common installation would be https://yourServer/.

Check certificate

Whether the validity of the SSL certificate should be checked or not.

Warning

If the SSL certificate is not checked, the authentication request could be modified and the answer to the request can be modified, easily granting access to an attacker.

Enable privacyIDEA for backend users

If checked, a user trying to authenticate at the backend, will need to authenticate against privacyIDEA.

Enable privacyIDEA for frontend users

If checked, a user trying to authenticate at the frontend, will need to authenticate against privacyIDEA.

Pass to other authentication module

If the authentication at privacyIDEA fails, the credential the user entered will be verified against the next authentication module.

This can come in handy, if you are setting up the system and if you want to avoid locking yourself out.

Anyway, in a productive environment you probably want to uncheck this feature.

13.7. OTRS

There are two plugins for OTRS. For OTRS version 4.0 and higher use privacyIDEA-4_0.pm.

This perl module needs to be installed to the directory Kernel/System/Auth.

On Ubuntu 14.04 LTS you can also install the module using the PPA repository and installing:

apt-get install privacyidea-otrs

To activate the OTP authentication you need to add the following to Kernel/Config.pm:

$Self->{'AuthModule'} = 'Kernel::System::Auth::privacyIDEA';
$Self->{'AuthModule::privacyIDEA::URL'} = \
        "https://localhost/validate/check";
$Self->{'AuthModule::privacyIDEA::disableSSLCheck'} = "yes";

Note

As mentioned earlier you should only disable the checking of the SSL certificate if you are in a test environment. For productive use you should never disable the SSL certificate checking.

Note

This plugin requires, that you also add the path validate/check to the URL.

13.8. Apache2

The Apache plugin uses mod_wsgi and redis to provide a basic authentication on Apache2 side and validating the credentials against privacyIDEA.

On Ubuntu 14.04 LTS you can easily install the module from the PPA repository by issuing:

apt-get install privacyidea-apache-client

To activate the OTP authentication on a “Location” or “Directory” you need to configure Apache2 like this:

<Directory /var/www/html/secretdir>
     AuthType Basic
     AuthName "Protected Area"
     AuthBasicProvider wsgi
     WSGIAuthUserScript /usr/share/pyshared/privacyidea_apache.py
     Require valid-user
</Directory>

Note

Basic Authentication sends the base64 encoded password on each request. So the browser will send the same one time password with each reqeust. Thus the authentication module needs to cache the password as the successful authentication. Redis is used for caching the password.

Warning

As redis per default is accessible by every user on the machine, you need to use this plugin with caution! Every user on the machine can access the redis database to read the passwords of the users. The cached credentials are stored as pbkdf2+sha512 hash.

13.9. NGINX

The NGINX plugin uses the internal scripting language lua of the NGINX webserver and redis as caching backend to provide basic authentication against privacyIDEA.

On Ubuntu 14.04 LTS or Debian Jessi 8 you can easyly install the module by installing the following packages:

nginx-extras lua-nginx-redis lua-cjson redis-server

You can retrieve the nginx plugin here: [5]

To activate the OTP authentication on a “Location” you need to include the lua script that basically verifies the given credentials against the caching backend. New authentications will be sent to a different (internal) location via subrequest which points to the privacyIDEA authentication backend (via proxy_pass).

For the basic configuration you need to include the following lines to your location block

location / {
# additional plugin configuration goes here # access_by_lua_file ‘privacyidea.lua’;

} location /privacyidea-validate-check {

}

You can customize the authentication plugin by setting some of the following variables in the secured location block:

# redis host:port
# set $privacyidea_redis_host "127.0.0.1";
set $privacyidea_redis_post 6379;

# how long are accepted authentication allowed to be cached
# if expired, the user has to reauthenticate
set $privacyidea_ttl 900;

# privacyIDEA realm. leave empty == default
set $privacyidea_realm 'somerealm'; # (optional)

# pointer to the internal validation proxy pass
set $privacyidea_uri "/privacyidea-validate-check";

# the http realm presented to the user
set $privacyidea_http_realm "Secure zone (use PIN + OTP)";

Note

Basic Authentication sends the base64 encoded password on each request. So the browser will send the same one time password with each reqeust. Thus the authentication module needs to cache the password as the successful authentication. Redis is used for caching the password similar to the Apache2 plugin.

Warning

As redis per default is accessible by every user on the machine, you need to use this plugin with caution! Every user on the machine can access the redis database to read the passwords of the users. The cached credentials are stored as SHA1_HMAC hash. If you prefer a stronger hashing method feel free to extend the given password_hash/verify functions using additional lua libraries (for example by using lua-resty-string).

13.10. ownCloud

The ownCloud plugin is a ownCloud user backend. The directory user_privacyidea needs to be copied to your owncloud apps directory.

../_images/owncloud.png

Activating the ownCloud plugin

You can then activate the privacyIDEA ownCloud plugin by checking Use privacyIDEA to authenticate the users. All users now need to be known to privacyIDEA and need to authenticate using the second factor enrolled in privacyIDEA - be it an OTP token, Google Authenticator or SMS/Smartphone.

Checking Also allow users to authenticate with their normal passwords. lets the user choose if he wants to authenticate with the OTP token or with his original password from the original user backend.

Note

At the moment using a desktop client with a one time password is not supported.

ownCloud 9.1 and Nextcloud 10 come with a new two factor framework. The new privacyIDEA ownCloud App allows you to add a second factor, that is centrally managed by privacyIDEA to the ownCloud or Nextcloud installation.

The ownCloud privacyIDEA App is available here [8].

The App requires a subscription file to work for more than ten users. You can
get the subscription file at NetKnights [9].

13.11. Django

You can add two factor authentication with privacyIDEA to Django using this Django plugin. See django.

You can simple add PrivacyIDEA class to AUTHENTICATION_BACKENDS settings of Django.

13.12. OpenVPN

Read more about how to use OpenVPN with privacyidea at OTP with OpenVPN.

13.13. Windows

13.13.1. Credential Provider

The privacyIDEA Credential Provider adds two factor authentication to the Windows desktop or Terminal server. See http://privacyidea-credential-provider.readthedocs.io

13.13.2. Provider Class

There is a dot Net provider class, which you can use to integrate privacyIDEA authentication into other products and worflows. See https://github.com/sbidy/privacyIDEA_dotnetProvider