Difference between revisions of "Authentication/SAML"

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== Set up Zimbra SP in SimpleSAMLphp ==
 
== Set up Zimbra SP in SimpleSAMLphp ==
  
In SAML terms applications are called Service Providers or SP’s. The service that provides your user database and takes care of your authentication is in SAML terms called Identity Provider or IDP. Usually you only have one IDP and as many SP’s as you have applications. In this example we will set-up Zimbra as a SAML SP and use SimpleSAMLphp as IDP. This is the configuration needed on SimpleSAMLphp (in <code>/etc/simplesamlphp/metadata/saml20-sp-remote.php</code>):
+
See the following links that are updated regularly:
  
<pre>    $metadata['https://zm-zimbra9.barrydegraaff.tk/service/extension/samlreceiver'] = array(
+
https://blog.zimbra.com/2021/03/updated-saml-for-zimbra-now-supports-single-log-out/
        'simplesaml.attributes'    =&gt; true,
+
https://blog.zimbra.com/2021/05/zimbra-skillz-zimbra-with-on-premises-single-sign-on-using-simplesamlphp/
            'debug' =&gt; TRUE,
+
https://blog.zimbra.com/2020/02/zimbra-and-single-sign-on-using-saml/
            'AssertionConsumerService' =&gt; 'https://zm-zimbra9.barrydegraaff.tk/service/extension/samlreceiver',
+
https://github.com/Zimbra/keycloak
            'SingleLogoutService' =&gt; 'https://zm-zimbra9.barrydegraaff.tk/service/extension/samlslo',
 
            'NameIDFormat' =&gt; 'urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress',
 
            'authproc' =&gt; array (
 
                    10 =&gt; array(
 
            'class' =&gt; 'saml:AttributeNameID',
 
            'attribute' =&gt; 'emailAddress',
 
            'Format' =&gt; 'urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress',
 
              ),
 
          )
 
    );</pre>
 
You will also need to get the X.509 public certificate that is used for signing the SAML request from th IDP to Zimbra. You will need to download it and save it on your Zimbra server. This guide will assume you store your cert in <code>/tmp/idpcert.pem</code>, don’t forget to <code>chown zimbra:zimbra /tmp/idpcert.pem</code>. If you followed the SimpleSAMLphp setup guide you can find the certificate at <code>/etc/simplesamlphp/cert/server.crt</code>.
 
 
 
=== Set up Zimbra ===
 
 
 
Add the file <code>/opt/zimbra/conf/saml/saml-config.properties</code> to configure SAML in Zimbra add the contents:
 
 
 
<pre>    # Issuer
 
    saml_sp_entity_id=https://zm-zimbra9.barrydegraaff.tk/service/extension/samlreceiver
 
    # Login receiver for the service provider
 
    saml_acs=https://zm-zimbra9.barrydegraaff.tk/service/extension/samlreceiver
 
    # Name ID format for the IDP to use in the SAMLResponse
 
    saml_name_id_format=urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress
 
    # Date format for issue instant
 
    saml_date_format_instant=yyyy-MM-dd'T'HH:mm:ss'Z'
 
    # Identity provider login endpoint for redirect method
 
    saml_redirect_login_destination=https://saml.barrydegraaff.tk/simplesaml/saml2/idp/SSOService.php?spentityid=https://zm-zimbra9.barrydegraaff.tk/service/extension/samlreceiver
 
    # Identity provider login endpoint for POST method
 
    saml_post_login_destination=
 
    # Identity provider logout endpoint for redirect method
 
    saml_redirect_logout_destination=https://saml.barrydegraaff.tk/simplesaml/saml2/idp/SingleLogoutService.php
 
    # Identity provider logout endpoint for POST method
 
    saml_post_logout_destination=
 
    # Logout redirect page if we are the landing page logout endpoint
 
    saml_landing_logout_redirect_url=/
 
    # Disable the audience path check
 
    saml_skip_audience_restriction=true
 
    # URL to send the user with error_code, error_msg query params. Default results in HTTP error code pages.
 
    saml_error_redirect_url=
 
    # The SAML logout document encoding, and SAML login receiver parameter encoding.
 
    saml_document_encoding=ASCII
 
    # Set to true to disable the audience path check.
 
    saml_skip_audience_restriction=false
 
    # The redirect location to send the user if their Zimbra account is not active.
 
    saml_inactive_account_redirect_url</pre>
 
From the command line as user root copy the samlextn.jar and set up the IDP certificate like this:
 
 
 
<pre>mkdir /opt/zimbra/lib/ext/saml
 
cp /opt/zimbra/extensions-network-extra/saml/samlextn.jar /opt/zimbra/lib/ext/saml/
 
su zimbra
 
cat /tmp/idpcert.pem |xargs -0 zmprov md exampledomain.com zimbraMyoneloginSamlSigningCert
 
zmprov mcf zimbraCsrfRefererCheckEnabled FALSE
 
zmmailboxdctl restart</pre>
 
=== Single logout ===
 
 
 
In case you need to support SLO initiated from the IDP you need the SLO url: https://zimbraserver.example.com/service/extension/samlslo
 
 
 
Also if you want to trigger the IDP to log-out when the user clicks logout in Zimbra you have to configure Zimbra to use this log-out url: https://zimbraserver.example.com/service/extension/samllogout.
 
 
 
=== Create users ===
 
 
 
Your user accounts must be manually created in Zimbra and be available in your IDP user database. It is important that the E-mail attribute in your IDP is set exactly the same as the Zimbra account name. Or the user will not be able to log-in. If it does not work run a <code>tail -f /opt/zimbra/log/*</code> while doing the authentication request and dig through to log to find out what the issue may be. Keywords to grep for: SAML, Audience and assertion.
 
 
 
=== Configurable Properties saml-config.properties ===
 
 
 
The samlextn.jar uses a property file located at: <code>${zimbra_home}/conf/saml/saml-config.properties</code>.
 
 
 
The following properties are supported:
 
 
 
{|
 
!width="10%"| Key
 
!width="37%"| Description
 
!width="24%"| Default
 
!width="27%"| Optional
 
|-
 
| saml_sp_entity_id
 
| Issuer
 
|
 
|
 
|-
 
| saml_acs
 
| Login receiver for the service provider
 
|
 
|
 
|-
 
| saml_redirect_login_destination
 
| Identity provider login endpoint for redirect method
 
|
 
|
 
|-
 
| saml_redirect_logout_destination
 
| Identity provider logout endpoint for redirect method
 
|
 
|
 
|-
 
| saml_post_login_destination
 
| Identity provider login endpoint for POST method (unused)
 
|
 
| √
 
|-
 
| saml_post_logout_destination
 
| Identity provider logout endpoint for POST method (unused)
 
|
 
| √
 
|-
 
| saml_name_id_format
 
| Name ID format for the IDP to use in the SAMLResponse
 
| <code>urn:oasis:names:tc:SAML:1.1:nameid-format:unspecified</code>
 
| √
 
|-
 
| saml_date_format_instant
 
| Date format for issue instant
 
| <code>yyyy-MM-dd'T'HH:mm:ss'Z'</code>
 
| √
 
|-
 
| saml_error_redirect_url
 
| URL to send the user with <code>error_code</code>, <code>error_msg</code> query params. Default results in HTTP error code pages.
 
|
 
| √
 
|-
 
| saml_landing_logout_redirect_url
 
| Logout redirect landing page if we are the last logout service.
 
| <code>/</code>
 
| √
 
|-
 
| saml_document_encoding
 
| The SAML logout document encoding, and SAML login receiver parameter encoding.
 
| <code>ASCII</code>
 
| √
 
|-
 
| saml_skip_audience_restriction
 
| Set to true to disable the audience path check.
 
| <code>false</code>
 
| √
 
|-
 
| saml_inactive_account_redirect_url
 
| The redirect location to send the user if their Zimbra account is not active.
 
| <code>/service/extension/samllogout</code>
 
| √
 
|}
 
  
 
{{Article Footer|Zimbra 9|02/22/2021}}
 
{{Article Footer|Zimbra 9|02/22/2021}}

Revision as of 13:05, 17 June 2022

Zimbra Single Sign-On using SAML with SimpleSAMLphp

   KB 20404        Last updated on 2022-06-17  




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ZCS 9.0 Article ZCS 9.0

Did you know that Zimbra support SAML single sign on? SAML is an open standard that allows you to have a single login page for all applications in your organization. SAML is a Zimbra Network Edition feature. Once you have set-up your SAML portal you can easily add Multi Factor Authentication.

Set up Zimbra SP in SimpleSAMLphp

See the following links that are updated regularly:

https://blog.zimbra.com/2021/03/updated-saml-for-zimbra-now-supports-single-log-out/ https://blog.zimbra.com/2021/05/zimbra-skillz-zimbra-with-on-premises-single-sign-on-using-simplesamlphp/ https://blog.zimbra.com/2020/02/zimbra-and-single-sign-on-using-saml/ https://github.com/Zimbra/keycloak

Verified Against: Zimbra 9 Date Created: 02/22/2021
Article ID: https://wiki.zimbra.com/index.php?title=Authentication/SAML Date Modified: 2022-06-17



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