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SAML Single Sign-On (SSO) for WordPress using Shibboleth-3 as IDP | Shibboleth-3 SSO Login

Shibboleth-3 Single Sign-On (SSO) login for WordPress can be achieved by using our WordPress SAML Single Sign-On(SSO) plugin. Our plugin is compatible with all the SAML compliant Identity providers. Here we will go through a step-by-step guide to configure SSO login between Wordpress site and Shibboleth-3 by considering Shibboleth-3 as IdP(Identity provider) and WordPress as SP(Service provider).

You can visit our WordPress SSO plugin to know more about the other features we provide.

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To configure Shibboleth-3 as SAML IdP with WordPress, you will need to install the miniOrange WP SAML SP SSO plugin.

Follow the following steps to configure Shibboleth-3 as IdP:

Configure Shibboleth-3 as IdP

  • In the miniOrange SAML SP SSO plugin, navigate to Service Provider Metadata tab. Here, you can find the SP metadata such as SP Entity ID and ACS (AssertionConsumerService) URL which are required to configure the Identity Provider.
Shibboleth-3 as IDP - Single Sign-On(SSO) for WordPress - Shibboleth-3 SSO Login with SAML / OAuth - WordPress SAML upload metadata

  • In conf/idp.properties, uncomment and set 'idp.encryption.optional' to true.
    eg. idp.encryption.optional = true
  • In conf/metadata-providers.xml, configure Service Provider like this 
<MetadataProvider xmlns:samlmd="urn:oasis:
names:tc:SAML:2.0:metadata" 

          id="miniOrangeInLineEntity" xsi:type="InlineMetadata
Provider"
        sortKey="1"> 

          <samlmd:EntityDescriptor ID="entity" entityID="<SP-EntityID / 
Issuer
        from Service Provider Info tab in plugin.>" 

            validUntil="2020-09-06T04:13:32Z"> 

            <samlmd:SPSSODescriptor AuthnRequests
Signed="false"
        WantAssertionsSigned="true" 

            protocolSupportEnumeration="urn:oasis:names:
tc:SAML:2.0:protocol">
        

              <samlmd:NameIDFormat> 

                urn:oasis:names:tc:SAML:
1.1:nameid-format:emailAddress
        

              </samlmd:NameIDFormat> 

            <samlmd:AssertionConsumerService
        Binding="urn:oasis:names:tc:
SAML:2.0:bindings:HTTP-POST" 

            Location="<ACS (AssertionConsumerService) URL from 
Step1 of
        the plugin under Identity Provider Tab.>" 

              index="1" /> 

            </samlmd:SPSSODescriptor> 

            </samlmd:EntityDescriptor> 

        </MetadataProvider>
  • In conf/saml-nameid.properties, uncomment and set default NameID as Email Address like this
        idp.nameid.saml2.default=urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress
  • In conf/saml-nameid-xml, search for shibboleth.SAML2NameIDGenerators. Uncomment the shibboleth.SAML2AttributeSourcedGenerator bean and comment all other ref beans
<!-- SAML 2 NameID Generation --> 

        <util:list id="shibboleth.SAML2NameIDGenerators"> 

          <!--<ref bean="shibboleth.SAML2TransientGenerator" /> --> 

          <!-->ref bean="shibboleth.SAML2PersistentGenerator" /> --> 

          <bean parent="shibboleth.SAML2AttributeSourcedGenerator" 

          p:format="urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress" 

          p:attributeSourceIds="#{ {'email'} }" /> 

        </util:list>
  • Make sure you have defined AttributeDefinition in conf/attribute-resolver.xml.
<!-- Note: AttributeDefinitionid must be same as what
 you provided in
        attributeSourceIds in conf/saml-nameid.xml --> 

        <resolver:AttributeDefinitionxsi:type="ad:Simple"
 id="email"
        sourceAttributeID="mail"> 

          <resolver:Dependency ref="ldapConnector" /> 

          <resolver:AttributeEncoderxsi:type="enc:SAML2String" 
name="email"
        friendlyName="email" /> 

        </resolver:AttributeDefinition > 



        <resolver:DataConnector id="ldapConnector"
 xsi:type="dc:LDAPDirectory"
        ldapURL="%{idp.authn.LDAP.ldapURL}" 

          baseDN="%{idp.authn.LDAP.baseDN}"
 principal="%{idp.authn.LDAP.bindDN}" 

          principalCredential="%{idp.authn.LDAP.bindDNCredential}"> 


          <dc:FilterTemplate> 

            <!-- Define you User Search Filter here --> 

            <![CDATA[
        (&(objectclass=*)
(cn=$requestContext.principalName)) ]]> 

          </dc:FilterTemplate> 
 


          <dc:ReturnAttributes>*</dc:ReturnAttributes> 

        </resolver:DataConnector>
  • Make sure you have AttributeFilterPolicy defined in conf/attribute-filter.xml.
<afp:AttributeFilterPolicy id="ldapAttributes"> 

        <afp:PolicyRequirementRulexsi:type="basic:ANY"/> 

          <afp:AttributeRuleattributeID="email"> 

            <afp:PermitValueRulexsi:type="basic:ANY"/> 

          </afp:AttributeRule> 

        </afp:AttributeFilterPolicy>
  • Restart the Shibboleth server.
  • You need to configure these endpoints in the miniOrange SAML plugin.
IDP Entity ID https://<your_domain>/idp/shibboleth
Single Login URL https://<your_domain>/idp/profile/SAML2/Redirect/SSO
Single Logout URL https://<your_domain>/idp/shibboleth
X.509 Certificate The public key certificate of your Shibboleth-3 server

You have successfully configured Shibboleth-3 as SAML IdP ( Identity Provider) for achieving Shibboleth-3 SSO login into your WordPress (WP) Site.


In the WordPress SAML SSO plugin, go to the Service Provider Setup tab of the plugin. There are two ways to configure the WordPress SSO plugin:

A. By uploading IDP metadata:

  • Click on Upload IDP metadata button.
  • Enter the Identity Provider Name
  • You can either upload a metadata file and click on Upload button or use a metadata URL and click on Fetch Metadata.
WordPress SAML SSO | Login-upload metadata

B.Manual Configuration:

  • Provide the required settings (i.e. Identity Provider Name, IDP Entity ID or Issuer, SAML Login URL, X.509 Certificate) as provided by your Identity Provider and click on the Save button.
  • Click on Test configuration to check the attributes and values sent by IDP.
WordPress SAML SSO | Test configuration

Step 3: Attribute Mapping

  • In the free plugin, only NameID is supported for Email and Username attributes of the WordPress user.
  • When a user performs SSO, the NameID value sent by the IDP will get mapped to the email and username of the WordPress user.
WordPress SAML SSO | Login-attribute mapping

In the WordPress SAML SSO plugin, go to the Service Provider Setup tab of the plugin. There are two ways to configure the WordPress SSO plugin:

A. By uploading IDP metadata:

  • Click on Upload IDP metadata button.
  • Enter the Identity Provider Name
  • You can either upload a metadata file and click on Upload button or use a metadata URL and click on Fetch Metadata.

B.Manual Configuration:

  • Provide the required settings (i.e. Identity Provider Name, IDP Entity ID or Issuer, SAML Login URL, X.509 Certificate) as provided by your Identity Provider and click on the Save button.
  • Click on Test configuration to check the attributes and values sent by IDP.
WordPress SAML SSO | Test configuration

Step 3: Attribute Mapping

  • Attribute Mapping feature allows you to map the user attributes sent by the IDP during SSO to the user attributes at WordPress.
  • In WordPress SAML plugin, go to Attribute/Role Mapping tab and fill up the following fields in Attribute Mapping section.

NOTE: If you click on Test Configuration button in Service Provider Setup tab and authenticate with your IDP, you can see a list of attributes sent by the IDP in the Attribute/Role mapping tab. This information can be used to provide the above mapping.


In the WordPress SAML SSO plugin, go to the Service Provider Setup tab of the plugin. There are two ways to configure the WordPress SSO plugin:

A. By uploading IDP metadata:

  • Click on Upload IDP metadata button.
  • Enter the Identity Provider Name
  • You can either upload a metadata file and click on Upload button or use a metadata URL and click on Fetch Metadata.
  • In the Premium plugin, you can enable auto-sync for the metadata URL which will auto-update the plugin configuration as per the IDP metadata after a set interval of time
WordPress SAML SSO | Login-enableauto scan

B.Manual Configuration:

  • Provide the required settings (i.e. Identity Provider Name, IDP Entity ID or Issuer, SAML Login URL, X.509 Certificate) as provided by your Identity Provider and click on the Save button.
  • Click on Test configuration to check the attributes and values sent by IDP.
Test configuration - WordPress SAML SSO

  • In the Premium Plugin, you can provide the SAML Logout URL to achieve Single Logout on your WordPress site.

  • Attribute Mapping feature allows you to map the user attributes sent by the IDP during SSO to the user attributes at WordPress.
  • In WordPress SAML plugin, go to Attribute/Role Mapping tab and fill up the following fields in Attribute Mapping section.
Login-attribute mapping - WordPress SAML SSO

  • Custom Attribute Mapping: This feature allows you to map any attribute sent by the IDP to the usermeta table of WordPress.
Login-attribute mapping - WordPress SAML SSO

Step 4: Role Mapping

  • In the free plugin, you can choose a Default Role which will be assigned to all the non-admin users when they perform SSO.
  • Go to Attribute/Role mapping tab and navigate to Role Mapping section.
  • Select the Default Role and click on the Update button.
WordPress SAML SSO | Login-role mapping

Step 4: Role Mapping

    In the standard plugin, you can choose a default role which will be assigned to all the non-admin users when they perform SSO.

  • Go to Attribute/Role mapping tab and navigate to Role Mapping section.
  • Select the Default Role and click on the Save button.
WordPress SAML SSO | Login-role mapping

This feature allows you to assign and manage roles of the users when they perform SSO. Along with the default WordPress roles, this is compatible with any custom roles as well.

  • From the Attribute Mapping section of the plugin, provide a mapping for the field named Group/Role. This attribute will contain the role related information sent by the IDP and will be used for Role Mapping.
  • Navigate to role mapping section and provide the mappings for the highlighted roles.
Login-role mapping - WordPress SAML SSO

  • For example, If you want a user whose Group/Role attribute value is wp-editor to be assigned as an Editor in WordPress, just provide the mapping as wp-editor in the Editor field of Role Mapping section.

Step 5: SSO settings

  • In the free plugin you can add a Single Sign-On button by enabling Add a Single Sign-On button on the WordPress Login Page toggle in Option 1.
WordPress SAML SSO | Login-SSO button

  • If your WordPress theme supports login widget, you can add a login widget to enable SP-Initiated SSO on your site.
  • Navigate to Redirection and SSO links tab and follow the given steps given under Option 2: Use a Widget to add a login widget on your site.
WordPress SAML SSO | Login-sso setting

Step 5: SSO settings

In the Standard plugin you can enable SP-initiated SSO using the following options.

  • Auto-Redirection from site: If this option is enabled, any unauthenticated user trying to access your site will get redirected to the IDP login page and after successful authentication, they will be redirected back to the same page on your site which they were trying to access.

    • Steps:

    • Go to Redirection and SSO Links tab of the plugin and navigate to Option 1: Auto - Redirection from site.
    • Enable Redirect to IDP if user not logged in [PROTECT COMPLETE SITE]option.

    WordPress SAML SSO | Login-optin 1

  • Auto-Redirection from WordPress Login: If this option is enabled, any unauthenticated user trying to access the default WordPress login page will get redirected to the IDP login page for authentication. After successful authentication, they will be redirected back to the WordPress site.

    • Steps:

    • Go to Redirection and SSO Links tab of the plugin and navigate to Option 2: Auto- Redirection from WordPress Login.
    • Enable Redirect to IDP from WordPress Login Page option.
    WordPress SAML SSO | Login-optin 2

    NOTE: Please enable the Backdoor login and note down the backdoor URL. This will allow you to access the WordPress login page in case you get locked out of the IDP.


  • SSO Links: You can add SSO links anywhere on your site using the Shortcode and Widget provided in Redirection and SSO Links tab > Option 3: SSO Links section of the plugin
    • WordPress SAML SSO | Login-optin 3

In the Premium plugin you can enable SP-initiated SSO using the following options.

  • Auto-Redirection from site: If this option is enabled, any unauthenticated user trying to access your site will get redirected to the IDP login page and after successful authentication they will be redirected back to the same page on your site which they were trying to access.

    • Steps:

    • Go to Redirection and SSO Links tab of the plugin and navigate to Option 1 : Auto-Redirection from site.
    • Enable Redirect to IDP if user not logged in [PROTECT COMPLETE SITE] option.
    Login-optin 1 - WordPress SAML SSO

  • Auto-Redirection from WordPress Login: If this option is enabled, any unauthenticated user trying to access the default WordPress login page will get redirected to the IDP login page for authentication. After successful authentication, they will be redirected back to the WordPress site.

    • Steps:

    • Go to Redirection and SSO Links tab of the plugin and navigate to Option 2: Auto-Redirection from WordPress Login.
    • Enable Redirect to IDP from WordPress Login Page option.
    Login-optin 2 - WordPress SAML SSO

    NOTE: Please enable the Backdoor login and note down the backdoor URL. This will allow you to access the WordPress login page in case you get locked out of the IDP login.


  • Login Button: You can add a customized login button anywhere on your site or WordPress login page by navigating to Option 3: Login Button section of Redirection and SSO Links tab.
Login-optin 3 - WordPress SAML SSO

  • SSO Links: You can add SSO links anywhere on your site using the Shortcode and Widget provided in Option 4: SSO Links section of Redirection and SSO Links tab.
Login-optin 4 - WordPress SAML SSO

You have successfully configured WordPress (WP) as SAML SP for achieving Shibboleth-3 SSO login into your WordPress (WP) Site.

In this Guide, you have successfully configured Shibboleth-3 SAML Single Sign-On (Shibboleth-3 SSO Login ) choosing Shibboleth-3 as IdP and WordPress as SP using miniOrange plugin-SAML Single Sign On – SSO Login. This solution ensures that you are ready to roll out secure access to your WordPress(WP) site using Shibboleth-3 login credentials within minutes.



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