# ownCloud Server Administration Manual

# Shibboleth Integration (Enterprise Subscription only)

## Introduction

The ownCloud Shibboleth user backend application integrates ownCloud with a Shibboleth Service Provider (SP) and allows operations in federated and single-sign-on infrastructures.

Currently supported installations are based on the native Apache integration . The individual configuration of the service provider is highly dependent on the operating system, as well as on the integration with the Identity Providers (IdP), and deserve case-by-case analysis and installation.

The ownCloud Desktop Client and mobile clients can interact with an ownCloud instance running inside a Shibboleth Service Provider by using built-in browser components for authentication against the IdP.

## Apache Configuration

This is an example configuration as installed and operated on a Linux server running the Apache Web server. These configurations are highly operating system specific and require a high degree of customization.

The ownCloud instance itself is installed in `/var/www/owncloud/`. The following aliases are defined in an Apache virtual host directive:

    # non-Shibboleth access
    Alias /owncloud /var/www/owncloud/
    # for Shibboleth access
    Alias /oc-shib /var/www/owncloud/

Further Shibboleth specific configuration as defined in `/etc/apache2/conf.d/shib.conf`:

    #
    # Load the Shibboleth module.
    #
    LoadModule mod_shib /usr/lib64/shibboleth/mod_shib_22.so

    #
    # Ensures handler will be accessible.
    #
    <Location /Shibboleth.sso>
      Satisfy Any
      Allow from all
    </Location>

    #
    # Configure the module for content.
    #
    # Shibboleth is disabled for the following location to allow non
      shibboleth webdav access
    <Location ~ "/oc-shib/remote.php/nonshib-webdav">
      Satisfy Any
      Allow from all
      AuthType None
      Require all granted
    </Location>

    # Shibboleth is disabled for the following location to allow public link
      sharing
    <Location ~
      "/oc-shib/(status.php$
      |public.php$
      |cron.php$
      |core/img/
      |index.php/apps/files_sharing/publicpreview.png$
      |index.php/apps/files/ajax/upload.php$
      |index.php/core/ajax/translations.php$
      |apps/files/templates/fileexists.html$
      |index.php/apps/files/ajax/mimeicon.php$)">
      Satisfy Any
      Allow from all
      AuthType None
      Require all granted
    </Location>

    # Shibboleth is disabled for the following location to allow public gallery
      sharing
    <Location ~
     "/oc-shib/(apps/gallery/templates/slideshow.html$
     |index.php/apps/gallery/ajax/getimages.php
     |index.php/apps/gallery/ajax/thumbnail.php
     |index.php/apps/gallery/ajax/image.php)">
      Satisfy Any
      Allow from all
      AuthType None
      Require all granted
    </Location>

    # Shibboleth is disabled for the following location to allow public link
      sharing
    <Location ~ "/oc-shib/.*\.css">
      Satisfy Any
      Allow from all
      AuthType None
      Require all granted
    </Location>

    # Shibboleth is disabled for the following location to allow public link
      sharing
    <Location ~ "/oc-shib/.*\.js">
      Satisfy Any
      Allow from all
      AuthType None
      Require all granted
    </Location>

    # Besides the exceptions above this location is now under control of
      Shibboleth
    <Location /oc-shib>
      AuthType shibboleth
      ShibRequireSession On
      ShibUseHeaders Off
      ShibExportAssertion On
      require valid-user
    </Location>

## Application Configuration

After installing and enabling the Shibboleth application there are three configuration variables to set up, depending on the data sent back by the IdP. The configuration is stored in `config.php`:

    namespace OCA\user_shibboleth {
            const SHIB_SESSION_ID = 'Shib-Session-ID';
            const SHIB_EPPN = 'eppn';
            const SHIB_EMAIL = 'eppn';
            const SHIB_DISPLAY_NAME = 'eppn';
    }

Parameter | Description
SHIB_SESSION_ID | This constant defines the name of the environment variable holding the Shibboleth session id.
SHIB_EPPN | This constant defines the name of the environment variable which holds the EPPN (eduPersonPrincipalName). This is the unique user identifier.
SHIB_EMAIL | The environment variable with this given name holds the email address of the logged-in user.
SHIB_DISPLAY_NAME | This constant defines the name of the environment variable holding the user’s display name.

## WebDAV Support

Users of standard WebDAV clients can use an alternative WebDAV Url, for example `https://cloud.example.com/remote.php/nonshib-webdav/` to log in with their username and password. The password is generated on the Personal settings page.

For provisioning purpose an OCS API has been added to revoke a generated password for a user:

Syntax: `/v1/cloud/users/{userid}/non_shib_password`

- HTTP method: DELETE

Status codes:

- 100 - successful
- 998 - user unknown

## Known Limitations

## Encryption

File encryption can not be used together with Shibboleth because the encryption requires the user’s password to unlock the private encryption key. Due to the nature of Shibboleth the user’s password is not known to the service provider. Currently, we have no solution to this limitation.

## Other Login Mechanisms

Shibboleth is not compatible with any other ownCloud user backend because the login process is handled outside of ownCloud.

You can allow other login mechanisms (e.g. LDAP or ownCloud native) by creating a second Apache virtual host configuration. This second location is not protected by Shibboleth, and you can use your other ownCloud login mechanisms.

## Session Timeout

Session timeout on Shibboleth is controlled by the IdP. It is not possible to have a session length longer than the length controlled by the IdP. In extreme cases this could result in re-login on mobile clients and desktop clients every hour.

The session timeout can be overridden in the service provider, but this requires a source code change of the Apache Shibboleth module. A patch can be provided by the ownCloud support team.