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HOWTO Install and Configure a Shibboleth IdP v4.x on Debian-Ubuntu Linux with Apache2 + Jetty9

Table of Contents

  1. Requirements
    1. Hardware
    2. Other
  2. Software that will be installed
  3. Notes
  4. Install Instructions
    1. Install software requirements
    2. Configure the environment
    3. Install Shibboleth Identity Provider v4.x
    4. Install Jetty 9 Web Server
  5. Configuration Instructions
    1. Configure Jetty
    2. Configure SSL on Apache2 (front-end of Jetty)
    3. Configure Shibboleth Identity Provider Storage
      1. Strategy A - Default (HTML Local Storage, Encryption GCM, No Database) - Recommended
      2. Strategy B - JPA Storage Service - using a database
    4. Configure the Directory (openLDAP or AD) Connection
    5. Configure Shibboleth Identity Provider to release the persistent NameID
      1. Strategy A - Computed mode (Default) - Recommended
      2. Strategy B - Stored mode - using a database
    6. Configure the attribute resolver (sample)
    7. Configure Shibboleth Identity Provider to release the eduPersonTargetedID
      1. Strategy A - Computed mode - using the computed persistent NameID - Recommended
      2. Strategy B - Stored mode - using a database
    8. Configure the attribute resolution with Attribute Registry
    9. Configure Shibboleth IdP Logging
    10. Translate IdP messages into the preferred language
    11. Disable SAML1 Deprecated Protocol
    12. Secure cookies and other IDP data
    13. Configure Attribute Filter Policy to release attributes to Federated Resources
  6. Register the IdP on the IDEM Test Federation
  7. Appendix A: Enable Consent Module: Attribute Release + Terms of Use Consent
  8. Appendix B: Import persistent-id from a previous database
  9. Appendix C: Useful logs to find problems
  10. Appendix D: Connect an SP with the IdP
  11. Utilities
  12. Useful Documentation
  13. Authors

Requirements

Hardware

  • CPU: 2 Core (64 bit)
  • RAM: 4 GB
  • HDD: 20 GB
  • OS: Debian 10 / Ubuntu 18.04 / Ubuntu 20.04

Other

  • SSL Credentials: HTTPS Certificate & Key
  • Logo:
    • size: 80x60 px (or other that respect the aspect-ratio)
    • format: PNG
    • style: with a transparent background
  • Favicon:
    • size: 16x16 px (or other that respect the aspect-ratio)
    • format: PNG
    • style: with a transparent background

Software that will be installed

  • ca-certificates
  • ntp
  • vim
  • Amazon Corretto 11 JDK
  • jetty 9.4.x
  • apache2 (>= 2.4)
  • openssl
  • gnupg
  • libservlet3.1-java
  • liblogback-java
  • default-mysql-server (if JPAStorageService is used)
  • libmariadb-java (if JPAStorageService is used)
  • libcommons-dbcp-java (if JPAStorageService is used)
  • libcommons-pool-java (if JPAStorageService is used)

Notes

This HOWTO uses example.org and idp.example.org to provide this guide with example values.

Please remember to replace all occurencences of the example.org value with the IdP domain name and idp.example.org value with the Full Qualified Name of the Identity Provider.

Install Instructions

Install software requirements

  1. Become ROOT:

    • sudo su -
  2. Change the default mirror to the GARR (only for italian institutions) ones on /etc/apt/sources.list (OPTIONAL):

    • debian.mirror.garr.it (Debian)
    • ubuntu.mirror.garr.it (Ubuntu)

    Debian Mirror List: https://www.debian.org/mirror/list
    Ubuntu Mirror List: https://launchpad.net/ubuntu/+archivemirrors

  3. Update packages:

    apt update && apt-get upgrade -y --no-install-recommends
  4. Install the required packages:

    apt install vim wget gnupg ca-certificates openssl apache2 ntp libservlet3.1-java liblogback-java --no-install-recommends
  5. Install Amazon Corretto JDK:

    wget -O- https://apt.corretto.aws/corretto.key | sudo apt-key add -
    
    apt-get install software-properties-common
    
    add-apt-repository 'deb https://apt.corretto.aws stable main'
    
    apt-get update; sudo apt-get install -y java-11-amazon-corretto-jdk
    
    java -version
  6. Check that Java is working:

    update-alternatives --config java

    (It will return something like this "There is only one alternative in link group java (providing /usr/bin/java):" )

Configure the environment

  1. Become ROOT:

    • sudo su -
  2. Be sure that your firewall is not blocking the traffic on port 443 and 80 for the IdP server.

  3. Set the IdP hostname:

    (ATTENTION: Replace idp.example.org with your IdP Full Qualified Domain Name and <HOSTNAME> with the IdP hostname)

    • vim /etc/hosts

      <YOUR SERVER IP ADDRESS> idp.example.org <HOSTNAME>
    • hostnamectl set-hostname <HOSTNAME>

  4. Set the variable JAVA_HOME in /etc/environment:

    • Set JAVA_HOME:
      echo 'JAVA_HOME=/usr/lib/jvm/java-11-amazon-corretto' > /etc/environment
      
      source /etc/environment
      
      export JAVA_HOME=/usr/lib/jvm/java-11-amazon-corretto
      
      echo $JAVA_HOME

Install Shibboleth Identity Provider v4.x

The Identity Provider (IdP) is responsible for user authentication and providing user information to the Service Provider (SP). It is located at the home organization, which is the organization which maintains the user's account. It is a Java Web Application that can be deployed with its WAR file.

  1. Become ROOT:

    • sudo su -
  2. Download the Shibboleth Identity Provider v4.x.y (replace '4.x.y' with the latest version found here):

    • cd /usr/local/src
    • wget http://shibboleth.net/downloads/identity-provider/4.x.y/shibboleth-identity-provider-4.x.y.tar.gz
    • tar -xzf shibboleth-identity-provider-4.*.tar.gz
  3. Run the installer install.sh:

    According to NSA and NIST, RSA with 3072 bit-modulus is the minimum to protect up to TOP SECRET over than 2030.

    • cd /usr/local/src/shibboleth-identity-provider-4.*/bin

    • bash install.sh -Didp.host.name=$(hostname -f) -Didp.keysize=3072

      ATTENTION: Replace the default value of 'Attribute Scope' with the domain name of your institution.

      Buildfile: /usr/local/src/shibboleth-identity-provider-4.x.y/bin/build.xml
      
      install:
      Source (Distribution) Directory (press <enter> to accept default): [/usr/local/src/shibboleth-identity-provider-4.x.y] ?
      Installation Directory: [/opt/shibboleth-idp] ?
      Backchannel PKCS12 Password: ###PASSWORD-FOR-BACKCHANNEL###
      Re-enter password:           ###PASSWORD-FOR-BACKCHANNEL###
      Cookie Encryption Key Password: ###PASSWORD-FOR-COOKIE-ENCRYPTION###
      Re-enter password:              ###PASSWORD-FOR-COOKIE-ENCRYPTION###
      SAML EntityID: [https://idp.example.org/idp/shibboleth] ?
      Attribute Scope: [example.org] ?

      By starting from this point, the variable idp.home refers to the directory: /opt/shibboleth-idp

      Save the ###PASSWORD-FOR-BACKCHANNEL### value somewhere to be able to find it when you need it.

      The ###PASSWORD-FOR-COOKIE-ENCRYPTION### will be saved into /opt/shibboleth-idp/credentials/secrets.properties as idp.sealer.storePassword and idp.sealer.keyPassword value.

Install Jetty 9 Web Server

Jetty is a Web server and a Java Servlet container. It will be used to run the IdP application through its WAR file.

  1. Become ROOT:

    • sudo su -
  2. Download and Extract Jetty:

    cd /usr/local/src
    
    wget https://repo1.maven.org/maven2/org/eclipse/jetty/jetty-distribution/9.4.43.v20210629/jetty-distribution-9.4.43.v20210629.tar.gz
    
    tar xzvf jetty-distribution-9.4.43.v20210629.tar.gz
  3. Create the jetty-src folder as a symbolic link. It will be useful for future Jetty updates:

    ln -nsf jetty-distribution-9.4.43.v20210629 jetty-src
  4. Create the system user jetty that can run the web server (without home directory):

    useradd -r -M jetty
  5. Create your custom Jetty configuration that overrides the default one and will survive upgrades:

    mkdir /opt/jetty
    
    wget https://registry.idem.garr.it/idem-conf/shibboleth/IDP4/jetty/start.ini -O /opt/jetty/start.ini
  6. Create the TMPDIR directory used by Jetty:

    mkdir /opt/jetty/tmp ; chown jetty:jetty /opt/jetty/tmp
    
    chown -R jetty:jetty /opt/jetty /usr/local/src/jetty-src
  7. Create the Jetty Log's folder:

    mkdir /var/log/jetty
    
    mkdir /opt/jetty/logs
    
    chown jetty:jetty /var/log/jetty /opt/jetty/logs
  8. Configure /etc/default/jetty:

    sudo bash -c 'cat > /etc/default/jetty <<EOF
    JETTY_HOME=/usr/local/src/jetty-src
    JETTY_BASE=/opt/jetty
    JETTY_USER=jetty
    JETTY_START_LOG=/var/log/jetty/start.log
    TMPDIR=/opt/jetty/tmp
    EOF'
  9. Create the service loadable from command line:

    cd /etc/init.d
    
    ln -s /usr/local/src/jetty-src/bin/jetty.sh jetty
    
    update-rc.d jetty defaults
  10. Check if all settings are OK:

    • service jetty check (Jetty NOT running)
    • service jetty start
    • service jetty check (Jetty running pid=XXXX)

    If you receive an error likes "Job for jetty.service failed because the control process exited with error code. See "systemctl status jetty.service" and "journalctl -xe" for details.", try this:

    • rm /var/run/jetty.pid
    • systemctl start jetty.service

Configuration Instructions

Configure Jetty

  1. Become ROOT:

    • sudo su -
  2. Configure the IdP Context Descriptor:

    mkdir /opt/jetty/webapps
    
    sudo bash -c 'cat > /opt/jetty/webapps/idp.xml <<EOF
    <Configure class="org.eclipse.jetty.webapp.WebAppContext">
      <Set name="war"><SystemProperty name="idp.home"/>/war/idp.war</Set>
      <Set name="contextPath">/idp</Set>
      <Set name="extractWAR">false</Set>
      <Set name="copyWebDir">false</Set>
      <Set name="copyWebInf">true</Set>
      <Set name="persistTempDirectory">false</Set>
    </Configure>
    EOF'
  3. Make the jetty user owner of IdP main directories:

    cd /opt/shibboleth-idp
    
    chown -R jetty logs/ metadata/ credentials/ conf/ war/
  4. Restart Jetty:

    • systemctl restart jetty.service

Configure SSL on Apache2 (front-end of Jetty)

The Apache HTTP Server will be configured as a reverse proxy and it will be used for SSL offloading.

  1. Become ROOT:

    • sudo su -
  2. Create the DocumentRoot:

    mkdir /var/www/html/$(hostname -f)
    
    sudo chown -R www-data: /var/www/html/$(hostname -f)
    
    echo '<h1>It Works!</h1>' > /var/www/html/$(hostname -f)/index.html
  3. Create the Virtualhost file (please pay attention: you need to edit this file and customize it, check the initial comment inside of it):

    wget https://registry.idem.garr.it/idem-conf/shibboleth/IDP4/apache2/idp.example.org.conf -O /etc/apache2/sites-available/$(hostname -f).conf
  4. Put SSL credentials in the right place:

    • HTTPS Server Certificate (Public Key) inside /etc/ssl/certs
    • HTTPS Server Key (Private Key) inside /etc/ssl/private
    • Add CA Cert into /etc/ssl/certs
      • If you use GARR TCS or GEANT TCS:

        wget -O /etc/ssl/certs/GEANT_OV_RSA_CA_4.pem https://crt.sh/?d=2475254782
        
        wget -O /etc/ssl/certs/SectigoRSAOrganizationValidationSecureServerCA.crt https://crt.sh/?d=924467857
        
        cat /etc/ssl/certs/SectigoRSAOrganizationValidationSecureServerCA.crt >> /etc/ssl/certs/GEANT_OV_RSA_CA_4.pem
        
        rm /etc/ssl/certs/SectigoRSAOrganizationValidationSecureServerCA.crt
      • If you use ACME (Let's Encrypt):

        • ln -s /etc/letsencrypt/live/<SERVER_FQDN>/chain.pem /etc/ssl/certs/ACME-CA.pem
  5. Configure the right privileges for the SSL Certificate and Key used by HTTPS:

    chmod 400 /etc/ssl/private/$(hostname -f).key
    
    chmod 644 /etc/ssl/certs/$(hostname -f).crt

    ($(hostname -f) will provide your IdP Full Qualified Domain Name)

  6. Enable the required Apache2 modules and the virtual hosts:

    a2enmod proxy_http ssl headers alias include negotiation
    
    a2ensite $(hostname -f).conf
    
    a2dissite 000-default.conf default-ssl
    
    systemctl restart apache2.service
  7. Check that IdP metadata is available on:

    • https://idp.example.org/idp/shibboleth
  8. Verify the strength of your IdP's machine on:

Configure Shibboleth Identity Provider Storage

Shibboleth Documentation reference: https://wiki.shibboleth.net/confluence/display/IDP4/StorageConfiguration

The IdP provides a number of general-purpose storage facilities that can be used by core subsystems like session management and consent.

Strategy A - Default (HTML Local Storage, Encryption GCM, No Database) - Recommended

The HTML Local Storage requires JavaScript be enabled because reading and writing to the client requires an explicit page be rendered. Note that this feature is safe to enable globally. The implementation is written to check for this capability in each client, and to back off to cookies. The default configuration generates encrypted assertions that a large percentage of non-Shibboleth SPs are going to be unable to decrypt, resulting a wide variety of failures and error messages. Some old Shibboleth SPs or software running on old Operating Systems will also fail to work.

If you don't change anything, the IdP stores data in a browser session cookie or HTML local storage and encrypt his assertions with AES-GCM encryption algorithm.

The IDEM Federation Operators collect a list of Service Providers that don't support the new default encryption algorithm and provide a solution here (Italian only).

See the configuration files and the Shibboleth documentation for details.

Check IdP Status:

  • bash /opt/shibboleth-idp/bin/status.sh

Proceed with Configure the Directory (openLDAP or AD) Connection

Strategy B - JPA Storage Service - using a database

This Storage service will memorize User Consent data on persistent database SQL.

  1. Become ROOT:

    • sudo su -
  2. Install required packages:

    • apt install default-mysql-server libmariadb-java libcommons-dbcp-java libcommons-pool-java --no-install-recommends
  3. Activate MariaDB database service:

    • systemctl start mariadb.service
  4. Address several security concerns in a default MariaDB installation (if it is not already done):

    • mysql_secure_installation
  5. (OPTIONAL) MySQL DB Access without password:

    • vim /root/.my.cnf

      [client]
      user=root
      password=##ROOT-DB-PASSWORD-CHANGEME##
      
  6. Create StorageRecords table on storageservice database:

    • wget https://registry.idem.garr.it/idem-conf/shibboleth/IDP4/db/shib-ss-db.sql -O /root/shib-ss-db.sql
    • fill missing data on shib-ss-db.sql before import
    • mysql -u root < /root/shib-ss-db.sql
    • systemctl restart mariadb.service
  7. Rebuild IdP with the needed libraries:

    • cd /opt/shibboleth-idp
    • ln -s /usr/share/java/mariadb-java-client.jar edit-webapp/WEB-INF/lib
    • ln -s /usr/share/java/commons-dbcp.jar edit-webapp/WEB-INF/lib
    • ln -s /usr/share/java/commons-pool.jar edit-webapp/WEB-INF/lib
    • bin/build.sh
  8. Enable JPA Storage Service:

    • vim /opt/shibboleth-idp/conf/global.xml

      and add the following directives to the tail, just before the last </beans> tag:

      <!-- DB-independent Configuration -->
      
      <bean id="storageservice.JPAStorageService" 
            class="org.opensaml.storage.impl.JPAStorageService"
            p:cleanupInterval="%{idp.storage.cleanupInterval:PT10M}"
            c:factory-ref="storageservice.JPAStorageService.EntityManagerFactory"/>
      
      <bean id="storageservice.JPAStorageService.EntityManagerFactory"
            class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
            <property name="packagesToScan" value="org.opensaml.storage.impl"/>
            <property name="dataSource" ref="storageservice.JPAStorageService.DataSource"/>
            <property name="jpaVendorAdapter" ref="storageservice.JPAStorageService.JPAVendorAdapter"/>
            <property name="jpaDialect">
               <bean class="org.springframework.orm.jpa.vendor.HibernateJpaDialect" />
            </property>
      </bean>
      
      <!-- DB-dependent Configuration -->
      
      <bean id="storageservice.JPAStorageService.JPAVendorAdapter" 
            class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
            <property name="database" value="MYSQL" />
      </bean>
      
      <!-- Bean to store IdP data unrelated with persistent identifiers on 'storageservice' database -->
      
      <bean id="storageservice.JPAStorageService.DataSource"
            class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" lazy-init="true"
            p:driverClassName="org.mariadb.jdbc.Driver"
            p:url="jdbc:mysql://localhost:3306/storageservice?autoReconnect=true"
            p:username="###_SS-USERNAME-CHANGEME_###"
            p:password="###_SS-DB-USER-PASSWORD-CHANGEME_###"
            p:maxActive="10"
            p:maxIdle="5"
            p:maxWait="15000"
            p:testOnBorrow="true"
            p:validationQuery="select 1"
            p:validationQueryTimeout="5" />

      ⚠️ IMPORTANT:

      remember to change "###_SS-USERNAME-CHANGEME_###" and "###_SS-DB-USER-PASSWORD-CHANGEME_###" with your DB user and password data

  9. Set the consent storage service to the JPA storage service:

    • vim /opt/shibboleth-idp/conf/idp.properties

      idp.consent.StorageService = storageservice.JPAStorageService
  10. Restart Jetty to apply the changes:

    • systemctl restart jetty.service
  11. Check IdP Status:

    • bash /opt/shibboleth-idp/bin/status.sh
  12. Proceed with Configure the Directory (openLDAP or AD) Connection

Configure the Directory (openLDAP or AD) Connection

  1. Become ROOT:

    • sudo su -
  2. Install ldap-utils package:

    • apt install ldap-utils
  3. Check that you can reach the Directory from your IDP server:

    • For OpenLDAP:

      ldapsearch -x -h <LDAP-SERVER-FQDN-OR-IP> -D 'cn=idpuser,ou=system,dc=example,dc=org' -w '<IDPUSER-PASSWORD>' -b 'ou=people,dc=example,dc=org' '(uid=<USERNAME>)'

      UTILITY FOR OPENLDAP ADMINISTRATOR:

      • slapcat | grep dn

        • the baseDN (-b parameter) ==> ou=people,dc=example,dc=org (branch containing the registered users)
        • the bindDN (-D parameter) ==> cn=idpuser,ou=system,dc=example,dc=org (distinguished name for the user that can made queries on the LDAP)
      • (uid=<USERNAME>) == (uid=$resolutionContext.principal) searchFilter into conf/ldap.properties file

    • For Active Directory:

      ldapsearch -x -h <AD-SERVER-FQDN-OR-IP> -D 'CN=idpuser,CN=Users,DC=ad,DC=example,DC=org' -w '<IDPUSER-PASSWORD>' -b 'CN=Users,DC=ad,DC=example,DC=org' '(sAMAccountName=<USERNAME>)'

      (sAMAccountName=<USERNAME>) ==> (sAMAccountName=$resolutionContext.principal) searchFilter (conf/ldap.properties)

  4. Connect the openLDAP to the IdP to allow the authentication of the users:

    • For OpenLDAP:

      • Solution 1 - LDAP + STARTTLS:

        • vim /opt/shibboleth-idp/credentials/secrets.properties

          # Default access to LDAP authn and attribute stores. 
          idp.authn.LDAP.bindDNCredential              = ###IDPUSER_PASSWORD###
          idp.attribute.resolver.LDAP.bindDNCredential = %{idp.authn.LDAP.bindDNCredential:undefined}
        • vim /opt/shibboleth-idp/conf/ldap.properties

          The ldap.example.org have to be replaced with the FQDN of the LDAP server.

          The idp.authn.LDAP.baseDN and idp.authn.LDAP.bindDN have to be replaced with the right value.

          The idp.attribute.resolver.LDAP.exportAttributes list MUST contains the attribute chosen for the persistent-id generation (idp.persistentId.sourceAttribute)

          idp.authn.LDAP.authenticator = bindSearchAuthenticator
          idp.authn.LDAP.ldapURL = ldap://ldap.example.org
          idp.authn.LDAP.useStartTLS = true
          idp.authn.LDAP.sslConfig = certificateTrust
          idp.authn.LDAP.trustCertificates = %{idp.home}/credentials/ldap-server.crt
          # List of attributes to request during authentication
          idp.authn.LDAP.returnAttributes = passwordExpirationTime,loginGraceRemaining
          idp.authn.LDAP.baseDN = ou=people,dc=example,dc=org
          idp.authn.LDAP.subtreeSearch = false
          idp.authn.LDAP.bindDN = cn=idpuser,ou=system,dc=example,dc=org
          # The userFilter is used to locate a directory entry to bind against for LDAP authentication.
          idp.authn.LDAP.userFilter = (uid={user})
          
          # LDAP attribute configuration, see attribute-resolver.xml
          # Note, this likely won't apply to the use of legacy V2 resolver configurations
          idp.attribute.resolver.LDAP.ldapURL             = %{idp.authn.LDAP.ldapURL}
          idp.attribute.resolver.LDAP.connectTimeout      = %{idp.authn.LDAP.connectTimeout:PT3S}
          idp.attribute.resolver.LDAP.responseTimeout     = %{idp.authn.LDAP.responseTimeout:PT3S}
          idp.attribute.resolver.LDAP.baseDN              = %{idp.authn.LDAP.baseDN:undefined}
          idp.attribute.resolver.LDAP.bindDN              = %{idp.authn.LDAP.bindDN:undefined}
          idp.attribute.resolver.LDAP.useStartTLS         = %{idp.authn.LDAP.useStartTLS:true}
          idp.attribute.resolver.LDAP.trustCertificates   = %{idp.authn.LDAP.trustCertificates:undefined}
          # The searchFilter is is used to find user attributes from an LDAP source
          idp.attribute.resolver.LDAP.searchFilter        = (uid=$resolutionContext.principal)
          # List of attributes produced by the Data Connector that should be directly exported as resolved IdPAttributes without requiring any <AttributeDefinition>
          idp.attribute.resolver.LDAP.exportAttributes    = ### List space-separated of attributes to retrieve directly from the directory ###
        • Paste the content of OpenLDAP certificate into /opt/shibboleth-idp/credentials/ldap-server.crt

        • Configure the right owner/group with:

          chown jetty:root /opt/shibboleth-idp/credentials/ldap-server.crt ; chmod 600 /opt/shibboleth-idp/credentials/ldap-server.crt
        • Restart Jetty to apply the changes:

          • systemctl restart jetty.service
        • Check IdP Status:

          • bash /opt/shibboleth-idp/bin/status.sh
        • Proceed with Configure Shibboleth Identity Provider to release the persistent NameID

      • Solution 2 - LDAP + TLS:

        • vim /opt/shibboleth-idp/credentials/secrets.properties

          # Default access to LDAP authn and attribute stores. 
          idp.authn.LDAP.bindDNCredential              = ###IDPUSER_PASSWORD###
          idp.attribute.resolver.LDAP.bindDNCredential = %{idp.authn.LDAP.bindDNCredential:undefined}
        • vim /opt/shibboleth-idp/conf/ldap.properties

          The ldap.example.org have to be replaced with the FQDN of the LDAP server.

          The idp.authn.LDAP.baseDN and idp.authn.LDAP.bindDN have to be replaced with the right value.

          The idp.attribute.resolver.LDAP.exportAttributes list MUST contains the attribute chosen for the persistent-id generation (idp.persistentId.sourceAttribute)

          idp.authn.LDAP.authenticator = bindSearchAuthenticator
          idp.authn.LDAP.ldapURL = ldaps://ldap.example.org
          idp.authn.LDAP.useStartTLS = false
          idp.authn.LDAP.sslConfig = certificateTrust
          idp.authn.LDAP.trustCertificates = %{idp.home}/credentials/ldap-server.crt
          # List of attributes to request during authentication
          idp.authn.LDAP.returnAttributes = passwordExpirationTime,loginGraceRemaining
          idp.authn.LDAP.baseDN = ou=people,dc=example,dc=org
          idp.authn.LDAP.subtreeSearch = false
          idp.authn.LDAP.bindDN = cn=idpuser,ou=system,dc=example,dc=org
          # The userFilter is used to locate a directory entry to bind against for LDAP authentication.
          idp.authn.LDAP.userFilter = (uid={user})
          
          # LDAP attribute configuration, see attribute-resolver.xml
          # Note, this likely won't apply to the use of legacy V2 resolver configurations
          idp.attribute.resolver.LDAP.ldapURL             = %{idp.authn.LDAP.ldapURL}
          idp.attribute.resolver.LDAP.connectTimeout      = %{idp.authn.LDAP.connectTimeout:PT3S}
          idp.attribute.resolver.LDAP.responseTimeout     = %{idp.authn.LDAP.responseTimeout:PT3S}
          idp.attribute.resolver.LDAP.baseDN              = %{idp.authn.LDAP.baseDN:undefined}
          idp.attribute.resolver.LDAP.bindDN              = %{idp.authn.LDAP.bindDN:undefined}
          idp.attribute.resolver.LDAP.useStartTLS         = %{idp.authn.LDAP.useStartTLS:true}
          idp.attribute.resolver.LDAP.trustCertificates   = %{idp.authn.LDAP.trustCertificates:undefined}
          # The searchFilter is used to find user attributes from an LDAP source
          idp.attribute.resolver.LDAP.searchFilter        = (uid=$resolutionContext.principal)
          # List of attributes produced by the Data Connector that should be directly exported as resolved IdPAttributes without requiring any <AttributeDefinition>
          idp.attribute.resolver.LDAP.exportAttributes    = ### List space-separated of attributes to retrieve directly from the directory ###
        • Paste the content of OpenLDAP certificate into /opt/shibboleth-idp/credentials/ldap-server.crt

        • Configure the right owner/group with:

          chown jetty:root /opt/shibboleth-idp/credentials/ldap-server.crt ; chmod 600 /opt/shibboleth-idp/credentials/ldap-server.crt
        • Restart Jetty to apply the changes:

          • systemctl restart jetty.service
        • Check IdP Status:

          • bash /opt/shibboleth-idp/bin/status.sh
        • Proceed with Configure Shibboleth Identity Provider to release the persistent NameID

      • Solution 3 - plain LDAP:

        • vim /opt/shibboleth-idp/credentials/secrets.properties

          # Default access to LDAP authn and attribute stores. 
          idp.authn.LDAP.bindDNCredential              = ###IDPUSER_PASSWORD###
          idp.attribute.resolver.LDAP.bindDNCredential = %{idp.authn.LDAP.bindDNCredential:undefined}
        • vim /opt/shibboleth-idp/conf/ldap.properties

          The ldap.example.org have to be replaced with the FQDN of the LDAP server.

          The idp.authn.LDAP.baseDN and idp.authn.LDAP.bindDN have to be replaced with the right value.

          The idp.attribute.resolver.LDAP.exportAttributes list MUST contains the attribute chosen for the persistent-id generation (idp.persistentId.sourceAttribute)

          idp.authn.LDAP.authenticator = bindSearchAuthenticator
          idp.authn.LDAP.ldapURL = ldap://ldap.example.org
          idp.authn.LDAP.useStartTLS = false
          # List of attributes to request during authentication
          idp.authn.LDAP.returnAttributes = passwordExpirationTime,loginGraceRemaining
          idp.authn.LDAP.baseDN = ou=people,dc=example,dc=org
          idp.authn.LDAP.subtreeSearch = false
          idp.authn.LDAP.bindDN = cn=idpuser,ou=system,dc=example,dc=org
          # The userFilter is used to locate a directory entry to bind against for LDAP authentication.
          idp.authn.LDAP.userFilter = (uid={user})
          
          # LDAP attribute configuration, see attribute-resolver.xml
          # Note, this likely won't apply to the use of legacy V2 resolver configurations
          idp.attribute.resolver.LDAP.ldapURL             = %{idp.authn.LDAP.ldapURL}
          idp.attribute.resolver.LDAP.connectTimeout      = %{idp.authn.LDAP.connectTimeout:PT3S}
          idp.attribute.resolver.LDAP.responseTimeout     = %{idp.authn.LDAP.responseTimeout:PT3S}
          idp.attribute.resolver.LDAP.baseDN              = %{idp.authn.LDAP.baseDN:undefined}
          idp.attribute.resolver.LDAP.bindDN              = %{idp.authn.LDAP.bindDN:undefined}
          idp.attribute.resolver.LDAP.useStartTLS         = %{idp.authn.LDAP.useStartTLS:true}
          idp.attribute.resolver.LDAP.trustCertificates   = %{idp.authn.LDAP.trustCertificates:undefined}
          # The searchFilter is is used to find user attributes from an LDAP source
          idp.attribute.resolver.LDAP.searchFilter        = (uid=$resolutionContext.principal)
          # List of attributes produced by the Data Connector that should be directly exported as resolved IdPAttributes without requiring any <AttributeDefinition>
          idp.attribute.resolver.LDAP.exportAttributes    = ### List space-separated of attributes to retrieve directly from the directory ###
        • Restart Jetty to apply the changes:

          • systemctl restart jetty.service
        • Check IdP Status:

          • bash /opt/shibboleth-idp/bin/status.sh
        • Proceed with Configure Shibboleth Identity Provider to release the persistent NameID

    • For Active Directory:

      • Solution 1 - AD + STARTTLS:

        • vim /opt/shibboleth-idp/credentials/secrets.properties

          # Default access to LDAP authn and attribute stores. 
          idp.authn.LDAP.bindDNCredential              = ###IDPUSER_PASSWORD###
          idp.attribute.resolver.LDAP.bindDNCredential = %{idp.authn.LDAP.bindDNCredential:undefined}
        • vim /opt/shibboleth-idp/conf/ldap.properties

          The ldap.example.org have to be replaced with the FQDN of the LDAP server.

          The idp.authn.LDAP.baseDN and idp.authn.LDAP.bindDN have to be replaced with the right value.

          The idp.attribute.resolver.LDAP.exportAttributes list MUST contains the attribute chosen for the persistent-id generation (idp.persistentId.sourceAttribute)

          idp.authn.LDAP.authenticator = bindSearchAuthenticator
          idp.authn.LDAP.ldapURL = ldap://ldap.example.org
          idp.authn.LDAP.useStartTLS = true
          idp.authn.LDAP.sslConfig = certificateTrust
          idp.authn.LDAP.trustCertificates = %{idp.home}/credentials/ldap-server.crt
          # List of attributes to request during authentication
          idp.authn.LDAP.returnAttributes = passwordExpirationTime,loginGraceRemaining
          idp.authn.LDAP.baseDN = CN=Users,DC=ad,DC=example,DC=org
          idp.authn.LDAP.subtreeSearch = false
          idp.authn.LDAP.bindDN = CN=idpuser,CN=Users,DC=ad,DC=example,DC=org
          # The userFilter is used to locate a directory entry to bind against for LDAP authentication.
          idp.authn.LDAP.userFilter = (sAMAccountName={user})
          
          # LDAP attribute configuration, see attribute-resolver.xml
          # Note, this likely won't apply to the use of legacy V2 resolver configurations
          idp.attribute.resolver.LDAP.ldapURL             = %{idp.authn.LDAP.ldapURL}
          idp.attribute.resolver.LDAP.connectTimeout      = %{idp.authn.LDAP.connectTimeout:PT3S}
          idp.attribute.resolver.LDAP.responseTimeout     = %{idp.authn.LDAP.responseTimeout:PT3S}
          idp.attribute.resolver.LDAP.baseDN              = %{idp.authn.LDAP.baseDN:undefined}
          idp.attribute.resolver.LDAP.bindDN              = %{idp.authn.LDAP.bindDN:undefined}
          idp.attribute.resolver.LDAP.useStartTLS         = %{idp.authn.LDAP.useStartTLS:true}
          idp.attribute.resolver.LDAP.trustCertificates   = %{idp.authn.LDAP.trustCertificates:undefined}
          # The searchFilter is is used to find user attributes from an LDAP source
          idp.attribute.resolver.LDAP.searchFilter        = (sAMAccountName=$resolutionContext.principal)
          # List of attributes produced by the Data Connector that should be directly exported as resolved IdPAttributes without requiring any <AttributeDefinition>
          idp.attribute.resolver.LDAP.exportAttributes    = ### List space-separated of attributes to retrieve directly from the directory ###
        • Paste the content of OpenLDAP certificate into /opt/shibboleth-idp/credentials/ldap-server.crt

        • Configure the right owner/group with:

          chown jetty:root /opt/shibboleth-idp/credentials/ldap-server.crt ; chmod 600 /opt/shibboleth-idp/credentials/ldap-server.crt
        • Restart Jetty to apply the changes:

          • systemctl restart jetty.service
        • Check IdP Status:

          • bash /opt/shibboleth-idp/bin/status.sh
        • Proceed with Configure Shibboleth Identity Provider to release the persistent NameID

      • Solution 2: AD + TLS:

        • vim /opt/shibboleth-idp/credentials/secrets.properties

          # Default access to LDAP authn and attribute stores. 
          idp.authn.LDAP.bindDNCredential              = ###IDPUSER_PASSWORD###
          idp.attribute.resolver.LDAP.bindDNCredential = %{idp.authn.LDAP.bindDNCredential:undefined}
        • vim /opt/shibboleth-idp/conf/ldap.properties

          The ldap.example.org have to be replaced with the FQDN of the LDAP server.

          The idp.authn.LDAP.baseDN and idp.authn.LDAP.bindDN have to be replaced with the right value.

          The idp.attribute.resolver.LDAP.exportAttributes list MUST contains the attribute chosen for the persistent-id generation (idp.persistentId.sourceAttribute)

          idp.authn.LDAP.authenticator = bindSearchAuthenticator
          idp.authn.LDAP.ldapURL = ldaps://ldap.example.org
          idp.authn.LDAP.useStartTLS = false
          idp.authn.LDAP.sslConfig = certificateTrust
          idp.authn.LDAP.trustCertificates = %{idp.home}/credentials/ldap-server.crt
          # List of attributes to request during authentication
          idp.authn.LDAP.returnAttributes = passwordExpirationTime,loginGraceRemaining
          idp.authn.LDAP.baseDN = CN=Users,DC=ad,DC=example,DC=org
          idp.authn.LDAP.subtreeSearch = false         
          idp.authn.LDAP.bindDN = CN=idpuser,CN=Users,DC=ad,DC=example,DC=org
          # The userFilter is used to locate a directory entry to bind against for LDAP authentication.
          idp.authn.LDAP.userFilter = (sAMAccountName={user})
          
          # LDAP attribute configuration, see attribute-resolver.xml
          # Note, this likely won't apply to the use of legacy V2 resolver configurations
          idp.attribute.resolver.LDAP.ldapURL             = %{idp.authn.LDAP.ldapURL}
          idp.attribute.resolver.LDAP.connectTimeout      = %{idp.authn.LDAP.connectTimeout:PT3S}
          idp.attribute.resolver.LDAP.responseTimeout     = %{idp.authn.LDAP.responseTimeout:PT3S}
          idp.attribute.resolver.LDAP.baseDN              = %{idp.authn.LDAP.baseDN:undefined}
          idp.attribute.resolver.LDAP.bindDN              = %{idp.authn.LDAP.bindDN:undefined}
          idp.attribute.resolver.LDAP.useStartTLS         = %{idp.authn.LDAP.useStartTLS:true}
          idp.attribute.resolver.LDAP.trustCertificates   = %{idp.authn.LDAP.trustCertificates:undefined}
          # The searchFilter is is used to find user attributes from an LDAP source
          idp.attribute.resolver.LDAP.searchFilter        = (sAMAccountName=$resolutionContext.principal)
          # List of attributes produced by the Data Connector that should be directly exported as resolved IdPAttributes without requiring any <AttributeDefinition>
          idp.attribute.resolver.LDAP.exportAttributes    = ### List space-separated of attributes to retrieve directly from the directory ###
        • Paste the content of OpenLDAP certificate into /opt/shibboleth-idp/credentials/ldap-server.crt

        • Configure the right owner/group with:

          chown jetty:root /opt/shibboleth-idp/credentials/ldap-server.crt ; chmod 600 /opt/shibboleth-idp/credentials/ldap-server.crt
        • Restart Jetty to apply the changes:

          • systemctl restart jetty.service
        • Check IdP Status:

          • bash /opt/shibboleth-idp/bin/status.sh
        • Proceed with Configure Shibboleth Identity Provider to release the persistent NameID

      • Solution 3 - plain AD:

        • vim /opt/shibboleth-idp/credentials/secrets.properties

          # Default access to LDAP authn and attribute stores. 
          idp.authn.LDAP.bindDNCredential              = ###IDPUSER_PASSWORD###
          idp.attribute.resolver.LDAP.bindDNCredential = %{idp.authn.LDAP.bindDNCredential:undefined}
        • vim /opt/shibboleth-idp/conf/ldap.properties

          The ldap.example.org have to be replaced with the FQDN of the LDAP server.

          The idp.authn.LDAP.baseDN and idp.authn.LDAP.bindDN have to be replaced with the right value.

          The idp.attribute.resolver.LDAP.exportAttributes list MUST contains the attribute chosen for the persistent-id generation (idp.persistentId.sourceAttribute)

          idp.authn.LDAP.authenticator = bindSearchAuthenticator
          idp.authn.LDAP.ldapURL = ldap://ldap.example.org
          idp.authn.LDAP.useStartTLS = false
          # List of attributes to request during authentication
          idp.authn.LDAP.returnAttributes = passwordExpirationTime,loginGraceRemaining
          idp.authn.LDAP.baseDN = CN=Users,DC=ad,DC=example,DC=org
          idp.authn.LDAP.subtreeSearch = false
          idp.authn.LDAP.bindDN = CN=idpuser,CN=Users,DC=ad,DC=example,DC=org
          # The userFilter is used to locate a directory entry to bind against for LDAP authentication.
          idp.authn.LDAP.userFilter = (sAMAccountName={user})
          
          # LDAP attribute configuration, see attribute-resolver.xml
          # Note, this likely won't apply to the use of legacy V2 resolver configurations
          idp.attribute.resolver.LDAP.ldapURL             = %{idp.authn.LDAP.ldapURL}
          idp.attribute.resolver.LDAP.connectTimeout      = %{idp.authn.LDAP.connectTimeout:PT3S}
          idp.attribute.resolver.LDAP.responseTimeout     = %{idp.authn.LDAP.responseTimeout:PT3S}
          idp.attribute.resolver.LDAP.baseDN              = %{idp.authn.LDAP.baseDN:undefined}
          idp.attribute.resolver.LDAP.bindDN              = %{idp.authn.LDAP.bindDN:undefined}
          idp.attribute.resolver.LDAP.useStartTLS         = %{idp.authn.LDAP.useStartTLS:true}
          idp.attribute.resolver.LDAP.trustCertificates   = %{idp.authn.LDAP.trustCertificates:undefined}
          # The searchFilter is is used to find user attributes from an LDAP source
          idp.attribute.resolver.LDAP.searchFilter        = (sAMAccountName=$resolutionContext.principal)
          # List of attributes produced by the Data Connector that should be directly exported as resolved IdPAttributes without requiring any <AttributeDefinition>
          idp.attribute.resolver.LDAP.exportAttributes    = ### List space-separated of attributes to retrieve directly from the directory ###
        • Restart Jetty to apply the changes:

          • systemctl restart jetty.service
        • Check IdP Status:

          • bash /opt/shibboleth-idp/bin/status.sh
        • Proceed with Configure Shibboleth Identity Provider to release the persistent NameID

Configure Shibboleth Identity Provider to release the persistent NameID

Shibboleth Documentation reference: https://wiki.shibboleth.net/confluence/display/IDP4/PersistentNameIDGenerationConfiguration

SAML 2.0 (but not SAML 1.x) defines a kind of NameID called a "persistent" identifier that every SP receives for the IdP users. This part will teach you how to release the "persistent" identifiers with a database (Stored Mode) or without it (Computed Mode).

By default, a transient NameID will always be released to the Service Provider if the persistent one is not requested.

Strategy A - Computed mode (Default) - Recommended

  1. Become ROOT:

    • sudo su -
  2. Enable the generation of the computed persistent-id with:

    • vim /opt/shibboleth-idp/conf/saml-nameid.properties

      The sourceAttribute MUST be an attribute, or a list of comma-separated attributes, that uniquely identify the subject of the generated persistent-id.

      The sourceAttribute MUST be Stable, Permanent and Not-reassignable attribute.

      # ... other things ...#
      # OpenLDAP has the UserID into "uid" attribute
      idp.persistentId.sourceAttribute = uid
      
      # Active Directory has the UserID into "sAMAccountName"
      #idp.persistentId.sourceAttribute = sAMAccountName
      # ... other things ...#
      
      # BASE64 will match Shibboleth V2 values, we recommend BASE32 encoding for new installs.
      idp.persistentId.encoding = BASE32
      idp.persistentId.generator = shibboleth.ComputedPersistentIdGenerator
    • vim /opt/shibboleth-idp/conf/saml-nameid.xml

      • Uncomment the line:

        <ref bean="shibboleth.SAML2PersistentGenerator" />
    • vim /opt/shibboleth-idp/credentials/secrets.properties

      idp.persistentId.salt = ### result of command 'openssl rand -base64 36' ###
  3. Restart Jetty to apply the changes:

    • systemctl restart jetty.service
  4. Check IdP Status:

    • bash /opt/shibboleth-idp/bin/status.sh
  5. Proceed with Configure the attribute resolver (sample)

Strategy B - Stored mode - using a database

  1. Become ROOT:

    • sudo su -
  2. Install required packages:

    • apt install default-mysql-server libmariadb-java libcommons-dbcp-java libcommons-pool-java --no-install-recommends
  3. Activate MariaDB database service:

    • systemctl start mariadb.service
  4. Address several security concerns in a default MariaDB installation (if it is not already done):

    • mysql_secure_installation
  5. (OPTIONAL) MySQL DB Access without password:

    • vim /root/.my.cnf

      [client]
      user=root
      password=##ROOT-DB-PASSWORD-CHANGEME##
      
  6. Create shibpid table on shibboleth database.

    • wget https://registry.idem.garr.it/idem-conf/shibboleth/IDP4/db/shib-pid-db.sql -O /root/shib-pid-db.sql
    • fill missing data on shib-pid-db.sql before import
    • mysql -u root < shib-pid-db.sql
    • systemctl restart mariadb.service
  7. Rebuild IdP with the needed libraries:

    • cd /opt/shibboleth-idp
    • ln -s /usr/share/java/mariadb-java-client.jar edit-webapp/WEB-INF/lib
    • ln -s /usr/share/java/commons-dbcp.jar edit-webapp/WEB-INF/lib
    • ln -s /usr/share/java/commons-pool.jar edit-webapp/WEB-INF/lib
    • bin/build.sh
  8. Enable Persistent Identifier's store:

    • vim /opt/shibboleth-idp/conf/global.xml

      and add the following directives to the tail, just before the last </beans> tag:

      <!-- Bean to store persistent-id on 'shibboleth' database -->
      
      <bean id="MyDataSource"
            class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" lazy-init="true"
            p:driverClassName="org.mariadb.jdbc.Driver"
            p:url="jdbc:mysql://localhost:3306/shibboleth?autoReconnect=true"
            p:username="###_SHIB-USERNAME-CHANGEME_###"
            p:password="###_SHIB-DB-USER-PASSWORD-CHANGEME_###"
            p:maxActive="10"
            p:maxIdle="5"
            p:maxWait="15000"
            p:testOnBorrow="true"
            p:validationQuery="select 1"
            p:validationQueryTimeout="5" />

      ⚠️ IMPORTANT:

      remember to change "###_SHIB-USERNAME-CHANGEME_###" and "###_SHIB-DB-USER-PASSWORD-CHANGEME_###" with your DB user and password data

  9. Enable the generation of the persistent-id:

    • vim /opt/shibboleth-idp/conf/saml-nameid.properties

      The sourceAttribute MUST be an attribute, or a list of comma-separated attributes, that uniquely identify the subject of the generated persistent-id.

      The sourceAttribute MUST be Stable, Permanent and Not-reassignable attribute.

      # ... other things ...#
      # OpenLDAP has the UserID into "uid" attribute
      idp.persistentId.sourceAttribute = uid
      
      # Active Directory has the UserID into "sAMAccountName"
      #idp.persistentId.sourceAttribute = sAMAccountName
      
      # BASE64 will match Shibboleth V2 values, we recommend BASE32 encoding for new installs.
      idp.persistentId.encoding = BASE32
      # ... other things ...#
      idp.persistentId.generator = shibboleth.StoredPersistentIdGenerator
      # ... other things ...#
      idp.persistentId.dataSource = MyDataSource
      # ... other things ...#
    • vim /opt/shibboleth-idp/credentials/secrets.properties

      idp.persistentId.salt = ### result of command 'openssl rand -base64 36'###
    • Enable the SAML2PersistentGenerator:

      • vim /opt/shibboleth-idp/conf/saml-nameid.xml

        • Uncomment the line:

          <ref bean="shibboleth.SAML2PersistentGenerator" />
      • vim /opt/shibboleth-idp/conf/c14n/subject-c14n.xml

        • Uncomment the line:

          <ref bean="c14n/SAML2Persistent" />
      • (OPTIONAL) vim /opt/shibboleth-idp/conf/c14n/subject-c14n.properties

        • Transform each letter of username, before storing in into the database, to Lowercase or Uppercase by setting the proper constant:

          # Simple username -> principal name c14n
          idp.c14n.simple.lowercase = true
          #idp.c14n.simple.uppercase = false
          idp.c14n.simple.trim = true
          
  10. Restart Jetty to apply the changes:

    • systemctl restart jetty.service
  11. Check IdP Status:

    • bash /opt/shibboleth-idp/bin/status.sh
  12. Proceed with Configure the attribute resolver (sample)

Configure the attribute resolver (sample)

The attribute resolver contains attribute definitions and data connectors that collect information from a variety of sources, combine and transform it, and produce a final collection of IdPAttribute objects, which are an internal representation of user data not specific to SAML or any other supported identity protocol.

  1. Download the sample attribute resolver provided by IDEM GARR AAI Federation Operators (OpenLDAP / Active Directory compliant):

    • wget https://registry.idem.garr.it/idem-conf/shibboleth/IDP4/attribute-resolver-v4-idem-sample.xml -O /opt/shibboleth-idp/conf/attribute-resolver.xml

      If you decide to use the Solutions plain LDAP/AD, remove or comment the following directives from your Attribute Resolver file:

      Line 1:  useStartTLS="%{idp.attribute.resolver.LDAP.useStartTLS:true}"
      Line 2:  trustFile="%{idp.attribute.resolver.LDAP.trustCertificates}"
    • Configure the right owner:

      • chown jetty /opt/shibboleth-idp/conf/attribute-resolver.xml
  2. Restart Jetty to apply the changes:

    • systemctl restart jetty.service
  3. Check IdP Status:

    • bash /opt/shibboleth-idp/bin/status.sh

Configure Shibboleth Identity Provider to release the eduPersonTargetedID

eduPersonTargetedID is an abstracted version of the SAML V2.0 Name Identifier format of "urn:oasis:names:tc:SAML:2.0:nameid-format:persistent".

To be able to follow these steps, you need to have followed the previous steps on "persistent" NameID generation.

Strategy A - Computed mode - using the computed persistent NameID - Recommended

  1. Check to have the following <AttributeDefinition> and the <DataConnector> into the attribute-resolver.xml:

    • vim /opt/shibboleth-idp/conf/attribute-resolver.xml

      <!-- ...other things ... -->
      
      <!--  AttributeDefinition for eduPersonTargetedID - Computed Mode  -->
      
      <AttributeDefinition xsi:type="SAML2NameID" nameIdFormat="urn:oasis:names:tc:SAML:2.0:nameid-format:persistent" id="eduPersonTargetedID">
          <InputDataConnector ref="computed" attributeNames="computedId" />
      </AttributeDefinition>
      
      <!-- ... other things... -->
      
      <!--  Data Connector for eduPersonTargetedID - Computed Mode  -->
      
      <DataConnector id="computed" xsi:type="ComputedId"
          generatedAttributeID="computedId"
          salt="%{idp.persistentId.salt}"
          algorithm="%{idp.persistentId.algorithm:SHA}"
          encoding="%{idp.persistentId.encoding:BASE32}">
      
          <InputDataConnector ref="myLDAP" attributeNames="%{idp.persistentId.sourceAttribute}" />
      
      </DataConnector>
  2. Create the custom eduPersonTargetedID.properties file:

    • wget https://registry.idem.garr.it/idem-conf/shibboleth/IDP4/attributes/custom/eduPersonTargetedID.properties -O /opt/shibboleth-idp/conf/attributes/custom/eduPersonTargetedID.properties
  3. Set proper owner/group with:

    • chown jetty:root /opt/shibboleth-idp/conf/attributes/custom/eduPersonTargetedID.properties
  4. Restart Jetty to apply the changes:

    • systemctl restart jetty.service
  5. Check IdP Status:

    • bash /opt/shibboleth-idp/bin/status.sh
  6. Proceed with Configure the attribute resolution with Attribute Registry

Strategy B - Stored mode - using the persistent NameID database

  1. Check to have the following <AttributeDefinition> and the <DataConnector> into the attribute-resolver.xml:

    • vim /opt/shibboleth-idp/conf/attribute-resolver.xml

      <!-- ...other things ... -->
      
      <!--  AttributeDefinition for eduPersonTargetedID - Stored Mode  -->
      
      <AttributeDefinition xsi:type="SAML2NameID" nameIdFormat="urn:oasis:names:tc:SAML:2.0:nameid-format:persistent" id="eduPersonTargetedID">
          <InputDataConnector ref="stored" attributeNames="storedId" />
      </AttributeDefinition>
      
      <!-- ... other things... -->
      
      <!--  Data Connector for eduPersonTargetedID - Stored Mode  -->
      
      <DataConnector id="stored" xsi:type="StoredId"
         generatedAttributeID="storedId"
         salt="%{idp.persistentId.salt}"
         queryTimeout="0">
      
         <InputDataConnector ref="myLDAP" attributeNames="%{idp.persistentId.sourceAttribute}" />
      
         <BeanManagedConnection>MyDataSource</BeanManagedConnection>
      </DataConnector>
  2. Create the custom eduPersonTargetedID.properties file:

    • wget https://registry.idem.garr.it/idem-conf/shibboleth/IDP4/attributes/custom/eduPersonTargetedID.properties -O /opt/shibboleth-idp/conf/attributes/custom/eduPersonTargetedID.properties
  3. Set proper owner/group with:

    • chown jetty:root /opt/shibboleth-idp/conf/attributes/custom/eduPersonTargetedID.properties
  4. Restart Jetty to apply the changes:

    • systemctl restart jetty.service
  5. Check IdP Status:

    • bash /opt/shibboleth-idp/bin/status.sh
  6. Proceed with Configure the attribute resolution with Attribute Registry

Configure the attribute resolution with Attribute Registry

File(s): conf/attribute-registry.xml, conf/attributes/default-rules.xml, conf/attribute-resolver.xml, conf/attributes/custom/

  1. Become ROOT:

    • sudo su -
  2. Download schac.xml into the right location:

    • wget https://registry.idem.garr.it/idem-conf/shibboleth/IDP4/attributes/schac.xml -O /opt/shibboleth-idp/conf/attributes/schac.xml
  3. Set the proper owner/group with:

    • chown jetty:root /opt/shibboleth-idp/conf/attributes/schac.xml
  4. Change the default-rules.xml to include the new schac.xml file in the list:

    • vim /opt/shibboleth-idp/conf/attributes/default-rules.xml

          <!-- ...other things ... -->
      
          <import resource="inetOrgPerson.xml" />
          <import resource="eduPerson.xml" />
          <import resource="eduCourse.xml" />
          <import resource="samlSubject.xml" />
          <import resource="schac.xml" />
      </beans>

Configure Shibboleth IdP Logging

Enrich IDP logs with the authentication error occurred on LDAP:

  • sed -i '/^    <logger name="org.ldaptive".*/a \\n    <!-- Logs on LDAP user authentication - ADDED BY IDEM HOWTO -->' /opt/shibboleth-idp/conf/logback.xml
  • sed -i '/^    <!-- Logs on LDAP user authentication - ADDED BY IDEM HOWTO -->/a \ \ \ \ \<logger name="org.ldaptive.auth.Authenticator" level="INFO" />' /opt/shibboleth-idp/conf/logback.xml

Translate IdP messages into preferred language

Translate the IdP messages in your language:

  • Get the files translated in your language from Shibboleth page
  • Put 'messages_XX.properties' downloaded file into /opt/shibboleth-idp/messages directory
  • Restart Jetty to apply the changes with systemctl restart jetty.service

Disable SAML1 Deprecated Protocol

  1. Modify the IdP metadata to enable only the SAML2 protocol:

    The <AttributeAuthorityDescriptor> role is needed ONLY IF you have SPs that use AttributeQuery to request attributes to your IdP.

    Shibboleth documentation reference: https://wiki.shibboleth.net/confluence/display/IDP4/SecurityAndNetworking#SecurityAndNetworking-AttributeQuery

    • vim /opt/shibboleth-idp/metadata/idp-metadata.xml

      - Remove completely the initial default comment
      
      <EntityDescriptor> Section:
        - Remove `validUntil` XML attribute.
      
      <IDPSSODescriptor> Section:
        - Remove completely the comment containing <mdui:UIInfo>. 
          You will add it on the "IDEM Entity Registry", the web application provided by the IDEM GARR AAI to manage metadata.
      
        - Remove the endpoint:
          <ArtifactResolutionService Binding="urn:oasis:names:tc:SAML:1.0:bindings:SOAP-binding" Location="https://idp.example.org:8443/idp/profile/SAML1/SOAP/ArtifactResolution" index="1"/>
          (and modify the index value of the next one to “1”)
      
        - Remove comment from SingleLogoutService endpoints
      
        - Between the last <SingleLogoutService> and the first <SingleSignOnService> endpoints add these 2 lines:
          <NameIDFormat>urn:oasis:names:tc:SAML:2.0:nameid-format:transient</NameIDFormat>
          <NameIDFormat>urn:oasis:names:tc:SAML:2.0:nameid-format:persistent</NameIDFormat>
      
          (because the IdP installed with this guide will release transient NameID, by default, and persistent NameID if requested.)
      
        - Remove the endpoint: 
          <SingleSignOnService Binding="urn:mace:shibboleth:1.0:profiles:AuthnRequest" Location="https://idp.example.org/idp/profile/Shibboleth/SSO"/>
      
        - Remove all ":8443" from the existing URL (such port is not used anymore)
      
      <AttributeAuthorityDescriptor> Section (Remember what was said at the beginning of this section):
        - From the list "protocolSupportEnumeration" replace the value:
          - urn:oasis:names:tc:SAML:1.1:protocol
          with:
          - urn:oasis:names:tc:SAML:2.0:protocol
      
        - Uncomment:
          <AttributeService Binding="urn:oasis:names:tc:SAML:2.0:bindings:SOAP" Location="https://idp.example.org/idp/profile/SAML2/SOAP/AttributeQuery"/>
      
        - Remove the endpoint: 
          <AttributeService Binding="urn:oasis:names:tc:SAML:1.0:bindings:SOAP-binding" Location="https://idp.example.org:8443/idp/profile/SAML1/SOAP/AttributeQuery"/>
      
        - Remove the comment starting with "If you uncomment..."
      
        - Remove all ":8443" from the existing URL (such port is not used anymore)
  2. Check that the metadata is available on:

    • https://idp.example.org/idp/shibboleth

Secure cookies and other IDP data

Shibboleth Documentation reference: https://wiki.shibboleth.net/confluence/display/IDP4/SecretKeyManagement

The default configuration of the IdP relies on a component called a "DataSealer" which in turn uses an AES secret key to secure cookies and certain other data for the IdPs own use. This key must never be shared with anybody else, and must be copied to every server node making up a cluster. The Java "JCEKS" keystore file stores secret keys instead of public/private keys and certificates and a parallel file tracks the key version number.

These instructions will regularly update the secret key (and increase its version) and provide you the capability to push it to cluster nodes and continually maintain the secrecy of the key.

  1. Download updateIDPsecrets.sh into the right location:

    • wget https://registry.idem.garr.it/idem-conf/shibboleth/IDP4/updateIDPsecrets.sh -O /opt/shibboleth-idp/bin/updateIDPsecrets.sh
  2. Provide the right privileges to the script:

    • sudo chmod +x /opt/shibboleth-idp/bin/updateIDPsecrets.sh
  3. Create the CRON script to run it:

    • sudo vim /etc/cron.daily/updateIDPsecrets

      #!/bin/bash
      
      /opt/shibboleth-idp/bin/updateIDPsecrets.sh
  4. Provide the right privileges to the script:

    • sudo chmod +x /etc/cron.daily/updateIDPsecrets
  5. Confirm that the script will be run daily with (you should see your script in the command output):

    • sudo run-parts --test /etc/cron.daily
  6. (OPTIONAL) Add the following properties to conf/idp.properties if you need to set different values than defaults:

    • idp.sealer._count - Number of earlier keys to keep (default 30)
    • idp.sealer._sync_hosts - Space separated list of hosts to scp the sealer files to (default generate locally)

Configure Attribute Filter Policy to release attributes to Federated Resources

Follow these steps ONLY IF your organization is connected to the GARR Network

  1. Become ROOT:

    • sudo su -
  2. Create the directory "tmp/httpClientCache" used by "shibboleth.FileCachingHttpClient":

    • mkdir -p /opt/shibboleth-idp/tmp/httpClientCache ; chown jetty /opt/shibboleth-idp/tmp/httpClientCache
  3. Modify your services.xml:

    • vim /opt/shibboleth-idp/conf/services.xml

      and add the following two beans on the top of the file, under the first <beans> TAG, only one time:

      <bean id="MyHTTPClient" parent="shibboleth.FileCachingHttpClientFactory"
            p:connectionTimeout="PT30S"
            p:connectionRequestTimeout="PT30S"
            p:socketTimeout="PT30S"
            p:cacheDirectory="%{idp.home}/tmp/httpClientCache" />
      
      <bean id="IdemAttributeFilterFull" class="net.shibboleth.ext.spring.resource.FileBackedHTTPResource"
            c:client-ref="MyHTTPClient"
            c:url="https://registry.idem.garr.it/idem-conf/shibboleth/IDP4/idem-attribute-filter-v4-full.xml"
            c:backingFile="%{idp.home}/conf/idem-attribute-filter-v4-full.xml"/>

      and enrich the "AttributeFilterResources" list with "IdemAttributeFilterFull":

      <!-- ...other things... -->
      
      <util:list id ="shibboleth.AttributeFilterResources">
          <value>%{idp.home}/conf/attribute-filter.xml</value>
          <ref bean="IdemAttributeFilterFull"/>
      </util:list>
      
      <!-- ...other things... -->
  4. Restart Jetty to apply the changes:

    • systemctl restart jetty.service
  5. Check IdP Status:

    • bash /opt/shibboleth-idp/bin/status.sh

Register the IdP on the IDEM Test Federation

Follow these steps ONLY IF your organization is connected to the GARR Network

  1. Register you IdP metadata on IDEM Entity Registry (your entity have to be approved by an IDEM Federation Operator before become part of IDEM Test Federation):

    • https://registry.idem.garr.it/
  2. Configure the IdP to retrieve the Federation Metadata:

    • Retrieve the Federation Certificate used to verify signed metadata:

      • wget https://md.idem.garr.it/certs/idem-signer-20241118.pem -O /opt/shibboleth-idp/metadata/federation-cert.pem
    • Check the validity:

      • cd /opt/shibboleth-idp/metadata

      • openssl x509 -in federation-cert.pem -fingerprint -sha1 -noout

        (sha1: D1:68:6C:32:A4:E3:D4:FE:47:17:58:E7:15:FC:77:A8:44:D8:40:4D)

      • openssl x509 -in federation-cert.pem -fingerprint -md5 -noout

        (md5: 48:3B:EE:27:0C:88:5D:A3:E7:0B:7C:74:9D:24:24:E0)

    • vim /opt/shibboleth-idp/conf/metadata-providers.xml

      and add before the last </MetadataProvider> this piece of code:

      <!-- IDEM Test Federation -->
      <MetadataProvider
         id="URLMD-IDEM-Federation"
         xsi:type="FileBackedHTTPMetadataProvider"
         backingFile="%{idp.home}/metadata/idem-test-metadata-sha256.xml"
         metadataURL="http://md.idem.garr.it/metadata/idem-test-metadata-sha256.xml">
      
         <!--
             Verify the signature on the root element of the metadata aggregate using a trusted metadata signing certificate.
         -->
         <MetadataFilter xsi:type="SignatureValidation" requireSignedRoot="true" certificateFile="${idp.home}/metadata/federation-cert.pem"/>   
      
         <!--
             Require a validUntil XML attribute on the root element and make sure its value is no more than 10 days into the future.
         -->
         <MetadataFilter xsi:type="RequiredValidUntil" maxValidityInterval="P10D"/>
      
         <!-- 
             Consume only SP in the metadata aggregate
         -->
         <MetadataFilter xsi:type="EntityRoleWhiteList">
           <RetainedRole>md:SPSSODescriptor</RetainedRole>
         </MetadataFilter>
      </MetadataProvider>
  3. Reload service with id shibboleth.MetadataResolverService to retrieve the Federation Metadata:

    • bash /opt/shibboleth-idp/bin/reload-service.sh -id shibboleth.MetadataResolverService
  4. Check that your IdP release at least eduPersonScopedAffiliation, eduPersonTargetedID and a saml2:NameID transient/persistent to the testing SP provided by IDEM:

    • bash /opt/shibboleth-idp/bin/aacli.sh -n <USERNAME> -r https://sp.example.org/shibboleth --saml2

      (the command will have a transient NameID into the Subject of the assertion)

    • bash /opt/shibboleth-idp/bin/aacli.sh -n <USERNAME> -r https://sp.aai-test.garr.it/shibboleth --saml2

      (the command will have a persistent NameID into the Subject of the assertion)

  5. Wait that your IdP Metadata is approved by an IDEM Federation Operator into the metadata stream and the next steps provided by the operator itself.

  6. Follow the instructions provided by IDEM.

Appendix A: Enable Consent Module: Attribute Release + Terms of Use Consent

Shibboleth Documentation reference: https://wiki.shibboleth.net/confluence/display/IDP4/ConsentConfiguration

The IdP includes the ability to require user consent to attribute release, as well as presenting a "terms of use" message prior to completing a login to a service, a simpler "static" form of consent.

  1. Move to the Shibboleth IdP dir:

    • cd /opt/shibboleth-idp
  2. Load Consent Module:

    • bin/module.sh -t idp.intercept.Consent || bin/module.sh -e idp.intercept.Consent
  3. Enable Consent Module by editing conf/relying-party.xml with the right postAuthenticationFlows:

    • <bean parent="SAML2.SSO" p:postAuthenticationFlows="attribute-release" /> - to enable only Attribute Release Consent
    • <bean parent="SAML2.SSO" p:postAuthenticationFlows="#{ {'terms-of-use', 'attribute-release'} }" /> - to enable both
  4. Restart Jetty:

    • sudo systemctl restart jetty.service

Appendix B: Import persistent-id from a previous database

Follow these steps ONLY IF your need to import persistent-id database from another IdP

  1. Become ROOT:

    • sudo su -
  2. Create a DUMP of shibpid table from the previous DB shibboleth on the OLD IdP:

    • cd /tmp
    • mysqldump --complete-insert --no-create-db --no-create-info -u root -p shibboleth shibpid > /tmp/shibboleth_shibpid.sql
  3. Move the /tmp/shibboleth_shibpid.sql of old IdP into /tmp/shibboleth_shibpid.sql on the new IdP.

  4. Import the content of /tmp/shibboleth_shibpid.sql into database of the new IDP:

    • cd /tmp ; mysql -u root -p shibboleth < /tmp/shibboleth_shibpid.sql
  5. Delete /tmp/shibboleth_shibpid.sql:

    • rm /tmp/shibboleth_shibpid.sql

Appendix C: Useful logs to find problems

Follow this if you need to find a problem of your IdP.

  1. Jetty Logs:

    • cd /opt/jetty/logs
    • ls -l *.stderrout.log
  2. Shibboleth IdP Logs:

    • cd /opt/shibboleth-idp/logs
    • Audit Log: vim idp-audit.log
    • Consent Log: vim idp-consent-audit.log
    • Warn Log: vim idp-warn.log
    • Process Log: vim idp-process.log

Appendix D: Connect an SP with the IdP

Shibboleth Documentation Reference:

Follow these steps IF your organization IS NOT connected to the GARR Network or IF you need to connect directly a Shibboleth Service Provider.

  1. Connect the SP to the IdP by adding its metadata on the metadata-providers.xml configuration file:

    • vim /opt/shibboleth-idp/conf/metadata-providers.xml

      <MetadataProvider id="HTTPMetadata"
                        xsi:type="FileBackedHTTPMetadataProvider"
                        backingFile="%{idp.home}/metadata/sp-metadata.xml"
                        metadataURL="https://sp.example.org/Shibboleth.sso/Metadata"
                        failFastInitialization="false"/>
  2. Adding an AttributeFilterPolicy on the conf/attribute-filter.xml file:

    • wget https://registry.idem.garr.it/idem-conf/shibboleth/IDP4/idem-example-arp.txt -O /opt/shibboleth-idp/conf/example-arp.txt
      
      cat /opt/shibboleth-idp/conf/example-arp.txt
    • copy and paste the content into /opt/shibboleth-idp/conf/attribute-filter.xml before the last element </AttributeFilterPolicyGroup>.

    • Make sure to change "### SP-ENTITYID ###" of the text pasted with the entityID of the Service Provider to connect with the Identity Provider installed.

  3. Restart Jetty to apply changes:

    • systemctl restart jetty.service

Utilities

  • AACLI: Useful to understand which attributes will be released to the federated resources

    • export JAVA_HOME=/usr/lib/jvm/java-11-amazon-corretto
    • bash /opt/shibboleth-idp/bin/aacli.sh -n <USERNAME> -r <ENTITYID-SP> --saml2
  • Customize IdP Login page with the institutional logo:

    1. Replace the images found inside /opt/shibboleth-idp/edit-webapp/images without renaming them.

    2. Rebuild IdP war file:

      • cd /opt/shibboleth-idp/bin ; ./build.sh
    3. Restart Jetty:

      • sudo systemctl restart jetty.service

Useful Documentation

Authors

Original Author