Enabling SAML SP-Initiated web single sign-on (SSO) | IBM Maximo

This task assumes that you have enabled your system to use the SAML web SSO feature. If you have not done this yet, see Enabling your system to use the SAML websingle sign-on (SSO) feature.

This task provides an example class and the steps to configure SP-initiated SSO.

Develop a SAML authentication request provider that implements the com.ibm.wsspi.security.web.saml.AuthnRequestProvider interface.

The com.ibm.wsspi.security.web.saml.AuthnRequestProvider class is found in the was_public.jar file in the (was_home)/dev directory.

The com.ibm.ws.wssecurity.saml.common.util.UTC class used in this sample can be found in the (was_home)/plugins directory.

The method getAuthnRequest(HttpServletRequest req, String errorMsg, String acsUrl, ArrayList<String> ssoUrls) must return a map that includes four entries with the following keys:

AuthnRequestProvider.SSO_URL

The SAML identity provider's Single-Sign-On URL.

AuthnRequestProvider.RELAY_STATE

The relayState as defined by the SAML Web Browser single-sign-on profile.

AuthnRequestProvider.REQUEST_ID

The value for this key must match the ID attribute's value in the AuthnRequest message.

AuthnRequestProvider.AUTHN_REQUEST

A Base64 encoded AuthnRequest message as defined in the spec. Your code is responsible for generating the AuthnRequest message.

You have to change your code as per your SSO URL you generated from Meta data.

import java.util.ArrayList;
                import java.util.HashMap;
                import javax.servlet.http.HttpServletRequest;
                import com.ibm.websphere.security.NotImplementedException;
                import com.ibm.ws.wssecurity.saml.common.util.UTC;
                import com.ibm.wsspi.security.web.saml.AuthnRequestProvider;
                .........

                public HashMap <String, String> getAuthnRequest(HttpServletRequest req, String errorMsg,
               String acsUrl, ArrayList<String> ssoUrls)
            throws NotImplementedException {
      
            //create map with following keys
            HashMap <String, String> map = new HashMap <String, String>();
          
            String ssoUrl = "https://example.com/saml20/Login";
            map.put(AuthnRequestProvider.SSO_URL, ssoUrl);

            String relayState = generateRandom();
            map.put(AuthnRequestProvider.RELAY_STATE, relayState);

            String requestId = generateRandom();
            map.put(AuthnRequestProvider.REQUEST_ID, requestId);
           
            //create AuthnRequest                       
            String authnMessage = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
                   +"<samlp:AuthnRequest xmlns:samlp=\"urn:oasis:names:tc:SAML:2.0:protocol\" "
                   +"ID=\""+requestID+"\" Version=\"2.0\" "
                   + "IssueInstant=\"" +UTC.format(new java.util.Date())+ "\" ForceAuthn=\"false\" IsPassive=\"false\""
                   + "ProtocolBinding=\"urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST\" "
                   + "AssertionConsumerServiceURL=\"" +acs+"\" "
                   + "Destination=\"" +destination +"\"> "
                   + "<saml:Issuer xmlns:saml=\"urn:oasis:names:tc:SAML:2.0:assertion\">"
                   + issuer
                   +"</saml:Issuer> <samlp:NameIDPolicy"
                   +"Format=\"urn:oasis:names:tc:SAML:2.0:nameid-format:transient\""
                   +"SPNameQualifier=\"mysp\""
                   +"AllowCreate=\"true\" /> <samlp:RequestedAuthnContext Comparison=\"exact\"> "
                   +"<saml:AuthnContextClassRef xmlns:saml=\"urn:oasis:names:tc:SAML:2.0:assertion\">"
                     +"urn:oasis:names:tc:SAML:2.0:ac:classes:</samlp:RequestedAuthnContext> </samlp:AuthnRequest>";

            map.put(AuthnRequestProvider.AUTHN_REQUEST, authnMessage);
                return map;
            }
             private String generateRandom() {
             //implement code that generates a random alpha numeric String that is unique
             //each time it is invoked and cannot be easily predicted (like a counter)
             }

Put a jar file that contains your custom class in the (WAS_HOME)/lib/ext directory.

Configure the SAML web SSO to use your AuthnRequest message.

Log on to the WebSphere Application Server administrative console.
 
Click Security > Global security.
 
Expand Web and SIP security and click Trust association.
 
Click Interceptors.
 
Click com.ibm.ws.security.web.saml.ACSTrustAssociationInterceptor
 
For Custom properties,
click new, then complete the following custom property information,
where id is what you assigned to the SSO Service Provider (SP) for which you want this property to apply:

Name: sso_<id>.sp.login.error.page
Value: The class name of your custom AuthnRequestProvider implementation.


For More Info please visit : IBM Knowledge center 

SAML web single sign-on