SAML 2.0 Based SSO with Active Directory Federation Services (ADFS) and mod_shib
Before you can setup SAML 2.0 based Single Sign-On with Active Directory Federation Services (ADFS) and mod_shib, ask your ADFS admin for the relevant server URLs. These are:
Then, make sure that the web server is accessible with a trusted certificate:
$ sudo a2enmod ssl $ sudo a2ensite default-ssl $ sudo service apache2 restart
Firstly, install mod_shib. You can do this using the following command:
$ sudo apt-get install libapache2-mod_shib2
This will install packages needed for mod_shib, including
Then, generate certificates for the
shibd daemon by running the following command:
The metadata provided by ADFS cannot be automatically imported, and must be cleaned up before using it with the file based
To do so, use
adfs2fed.php, as in the following command:
php apps/user_shibboleth/tools/adfs2fed.php \ https://<ADFS server FQDN>/FederationMetadata/2007-06/FederationMetadata.xml \ <AD-Domain> > /etc/shibboleth/filtered-metadata.xml
Next, you need to configure
To do this, in
<ApplicationDefaults entityID="https://<owncloud server FQDN>/login/saml" REMOTE_USER="eppn upn">
<SSO entityID="https://<ADFS server FQDN>/<URI>/"> SAML2 </SSO>
https://<owncloud server FQDN>/Shibboleth.sso/Metadata shibd exposes the metadata that is needed by ADFS to add the SP as a Relying party.
This part needs to be done by an ADFS administrator. Let him do his job while you continue with the Apache configuration below.
See step 2 in AD FS 2.0 Step-by-Step Guide.
If you have control over ADFS make it send the
Group by adding the following LDAP claim rule:
User Principal Nameto
Token Groups - Unqualified Namesand map it to
<Attributes xmlns="urn:mace:shibboleth:2.0:attribute-map" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <Attribute name="http://schemas.xmlsoap.org/ws/2005/05/identity/claims/upn" id="upn"/> </Attributes>
That will make the
userPrincipalName available as the environment variable
To protect ownCloud with shibboleth you need to protect the URL with a mod_shib based
we recommend protecting only the login page.
When the app is enabled and ownCloud is protected by mod_shib, due to the Apache 2 configuration, you should be forced to authenticate against an ADFS.
After a successful authentication you will be redirected to the ownCloud login page, where you can login as the administrator.
Double check you have a valid SAML session by browsing to
https://<owncloud server FQDN>/Shibboleth.sso/Session.
In the "User Authentication" settings for Shibboleth the
upn environment variables will be filled with the authenticated user’s
userPrincipalName in the "Server Environment" section.
uid and set the app mode to 'SSO Only' by running:
occ shibboleth:mode ssoonly occ shibboleth:mapping -u upn
displayName and email are only relevant for
Add Claims in ADFS and map them in the
attribute-map.xml if needed.
Close the browser tab to kill the session.
https://<owncloud server FQDN>again.
You should be logged in automatically.
Close the tab or delete the cookies to log out.
To make the logout work see the Logout section in this document.
On the ADFS Server:
Add "Windows Authentication" to the "Service" → "Authentication Methods" for "Intranet"
Run the following Powershell script for Firefox:
# Save the list of currently supported browser user-agents to a variable $browsers=Get-ADFSProperties | Select -ExpandProperty WIASupportedUseragents # Add Mozilla/5.0 user-agent to the list $browsers+="Mozilla/5.0" # Apply the new list Set-ADFSProperties -WIASupportedUseragents $browsers # Turn off Extended Protection #Set-ADFSProperties –ExtendedProtectionTokenCheck None # Restart the AD FS service Restart-Service ADFSsrv
On the Windows client:
For Internet Explorer, Edge, and Chrome
In the "Internet Settings" → "Security" → "Local Intranet"
Click on "Sites"
Click on "Advanced"
Add your ADFS machine with
https://<ADFS server FQDN>/and click OK.
Click on "customize level"
Find "User Authentication"
Check "Automatic login only for Intranet zone"
Accept the warning
network.negotiate-auth.trusted-urisand set it to the FQDN of your ADFS server
network.automatic-ntlm-auth.trusted-urisand set it to the FQDN of your ADFS server
Now if you logged into the domain and open your ownCloud server in the browser of your choice you should get directly to your ownCloud files without a login.
/etc/shibboleth/shibd.logger, set the overall behavior to debug:
# set overall behavior log4j.rootCategory=DEBUG, shibd_log, warn_log [...]
After a restart
/var/log/shibbloeth/shibd.log will show the parsed SAML requests and also which claims / attributes were found and mapped, or why not.
For Chrome there is a SAML Chrome Panel that allows checking the SAML messages in the developer tools reachable via F12.
For Firefox there is SAML tracer
In the Network tab of the developer extension make sure that "preserve logs" is enabled in order to see the redirects without wiping the existing network requests
In SAML scenarios the session is held on the SP as well as the IdP. Killing the SP session will redirect you to the IdP where you are still logged in, causing another redirect that creates a new SP session, making logout impossible. Killing only the IdP session will allow you to use the SP session until it expires.
There are multiple ways to deal with this:
By default ownCloud shows a popup telling the user to close the browser tab. That kills the SP session. If the whole browser is closed the IdP may still use a Kerberos-based authentication to provide SSO in effect making logout impossible.
Hide the logout action in the personal menu via CSS. This forces users to log out at the IdP.
In upcoming versions the clients will use OAuth2 to obtain a device specific token to prevent session expiry, making the old