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161 lines
6.5 KiB
Markdown
161 lines
6.5 KiB
Markdown
## Configure EGroupware for SSO via SAML with Univention
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### SAML IdP need to be enabled, see [UCS Manual about login](https://docs.software-univention.de/manual/5.0/en/central-management-umc/login.html#central-management-umc-login)
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* ```ucs-sso.<domain>``` need to resolve to one or more primary or secondary domain controllers
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* if you use LetsEncrypt, you should add the above domain to your certificate
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* UCS config registry variable ```portal/auth-mode``` has to be set to ```saml```
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* portal server needs to be restarted: ```systemctl restart univention-portal-server.service```
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### EGroupware needs to be configured for SAML via Setup (```https://egw.example.org/egroupware/setup/```)
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* Login into setup with user ```admin``` and the password from ```/var/lib/egroupware/egroupware-docker-install.log```
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* Go to [Edit current configuration]
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<html>
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<table border="0" align="center" cellspacing="0" width="90%">
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<tbody>
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<tr class="th">
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<td colspan="2"><b>If using SAML 2.0 / Shibboleth / SimpleSAMLphp:</b></td>
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</tr>
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<tr class="row_off">
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<td>Label to display as option on login page:<br>or leave empty and select SAML as authentication type above for single sign on</td>
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<td>Test SSO</td>
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</tr>
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<tr class="row_on">
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<td>Identity Provider:<br>You can specify multiple IdP on separate lines.</td>
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<td>https://ucs.example.org/simplesamlphp/saml2/idp/metadata.php</td>
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</tr>
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<tr class="row_off">
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<td>
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Metadata:<br/>
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refresh [ just now v]
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</td>
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<td>
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https://ucs.example.org/simplesamlphp/saml2/idp/metadata.php
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</td>
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</tr>
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<tr class="row_on">
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<td>Certificate Metadata is signed with: (Will be downloaded once, unless changed.)</td>
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<td>
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https://ucs.example.org/simplesamlphp/saml2/idp/certificate
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</td>
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</tr>
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<tr class="row_off">
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<td>Result data to use as username:</td>
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<td>
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[ uid v]
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</td>
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</tr>
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<tr class="row_on">
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<td>Result data to add or remove extra membership:</td>
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<td>
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[ eduPersonAffiliation v]
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</td>
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</tr>
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<tr class="row_off">
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<td>Result values (comma-separated) and group-name to add or remove:</td>
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<td>
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Staff<br/>
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Teachers
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</td>
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</tr>
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<tr class="row_on">
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<td>Allow SAML logins to join existing accounts:<br>(Requires SAML optional on login page and user to specify username and password)</td>
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<td>
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[ No v]
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</td>
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</tr>
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<tr class="row_off">
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<td>Match SAML usernames to existing ones (use strings or regular expression):</td>
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<td>
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</td>
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</tr>
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<tr class="row_on" height="25">
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<td>Some information for the own Service Provider metadata:</td>
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<td><a href="/egroupware/saml/module.php/saml/sp/metadata.php/default-sp">Metadata URL</a></td>
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</tr>
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<tr class="row_off">
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<td>Name for Service Provider:</td>
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<td>EGroupware</td>
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</tr>
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<tr class="row_on">
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<td>Technical contact:</td>
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<td>
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Ralf Becker<br/>
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rb@egroupware.org
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</td>
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</tr>
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</tbody></table>
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</html>
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> For Univention the Metadata-URL is also the ID of the IdP!
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### Configure EGroupware as service-provide in your UCS domain: **Domain > LDAP directory > SAML service provider**
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* Add: Type: SAML service provider
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```
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X Service provider activation status
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Service provider identifier: https://egw.example.org/egroupware/saml/module.php/saml/sp/metadata.php/default-sp
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Respond to this service provider URL after login: https://egw.example.org/egroupware/saml/module.php/saml/sp/saml2-acs.php/default-sp
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Single logout URL for this service provider: https://egw.example.org/egroupware/saml/module.php/saml/sp/saml2-logout.php/default-sp
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Format of NameID attribute:
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Name of the attribute that is used as NameID: uid
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Name of the organization for this service provider: EGroupware
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Description of this service provider:
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X Enable signed Logouts
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```
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* After saving the above, you have to edit the `Extended Settings` of your new Service Provide
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```
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X Allow transfering LDAP attributes to the Service Provider
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LDAP Attribute Name: uid
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LDAP Attribute Name: mailPrimaryAddress
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LDAP Attribute Name: givenName
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LDAP Attribute Name: sn
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```
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* If you want an automatic SAML SingleSignOn, eg. by clicking on an EGroupware tile in the portal,
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you need to switch in Setup > Site configuration ```Authentication``` to ```SAML``` and remove the
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```Test SSO``` label from the beginning of the SAML configuration.
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* To be able to use a password login in the above case, you need to add the following to your DB:
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```sql
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INSERT INTO egw_config VALUES ('phpgwapi', 'univention_discovery', 'true');
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```
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Clear the cache and use the following URL: ```https://example.org/egroupware/login.php?auth=univention```
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* Some useful links
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* [How does Single Sign-on work?](https://www.univention.com/blog-en/2021/08/how-does-single-sign-on-work-with-saml-and-openidconnect/)
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* [Reconfigure UCS Single Sign On](https://help.univention.com/t/reconfigure-ucs-single-sign-on/16161)
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* [Create an SSO Login for Applications to Groups](https://www.univention.com/blog-en/2020/07/sso-login-for-groups/)
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* [Adding a new external service provider](https://docs.software-univention.de/manual/5.0/en/domain-ldap/saml.html#domain-saml-additional-serviceprovider)
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### Configure EMail access without password
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> EGroupware normally use the session password to authenticate with the mail-server / Dovecot. If you use SSO (single sign on), EGroupware does not know your password and therefore can not pass it to the mail server.
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* login via ssh as user root to your mailserver
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* note the password from /etc/dovecot/master-users (secretpassword in the example below)
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```
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dovecotadmin:{PLAIN}secretpassword::::::
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```
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* add the following line to your /etc/dovecot/global-acls
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```shell
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echo "* user=dovecotadmin lra" >> /etc/dovecot/global-acls
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doveadm reload
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```
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* login with a user that has EGroupware admin rights
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* go to **Administration**, right-click on a user and select **mail-account**
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* in IMAP tab fill in the credentials:
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```
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Admin user: dovecotadmin
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Password: secretpassword
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X Use admin credentials to connect without a session-password, e.g. for SSO
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```
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> Currently, there are two bugs, you need to work around:
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> 1. EGroupware checks the above user/password as an IMAP user, so you need to additionally create him as UCS user with mail, in order to be able to store the dialog.
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> 2. The account you use for testing, must NOT have any additional personal mail accounts, as you get an error in that case, when you open the mail app.
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* log out and in again with SSO and check everything works
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