feat(oxshibboleth): implement forceauthn in shibboleth IDP for unsolicited SSO #63

oxShibboleth/shib-oxauth-authn/src/main/java/org/gluu/idp/context/GluuScratchContext.java

@@ -70,5 +70,14 @@ public String getExtraHttpParameters() {
             return null;
         }
     }
-
+
+    public boolean hasExtraHttpParameter(final String http_param_name) {
+
+        return extraHttpParameters.get(http_param_name) != null;
+    }
+
+    public String getExtraHttpParameter(final String http_param_name) {
+
+        return extraHttpParameters.get(http_param_name);
+    }
 }

oxShibboleth/shib-oxauth-authn/src/main/java/org/gluu/idp/externalauth/OxAuthReuseResultByAcr.java

@@ -13,6 +13,7 @@
 import net.shibboleth.idp.profile.context.RelyingPartyContext;
 import net.shibboleth.idp.saml.saml2.profile.config.BrowserSSOProfileConfiguration;
 
+import org.gluu.idp.context.GluuScratchContext;
 import org.gluu.orm.util.StringHelper;
 import org.opensaml.messaging.context.navigate.ChildContextLookup;
 import org.opensaml.profile.context.ProfileRequestContext;
@@ -27,24 +28,34 @@ public class OxAuthReuseResultByAcr implements Predicate<ProfileRequestContext>
     private final Logger LOG = LoggerFactory.getLogger(OxAuthReuseResultByAcr.class);
 
     private Function<ProfileRequestContext,AuthenticationContext> authnContextLookupStrategy;
+    private Function<ProfileRequestContext,GluuScratchContext> gluuScratchContextLookupStrategy;
 
     private static final String OX_AUTH_FLOW_ID  = "authn/oxAuth";
+    private static final String FORCE_AUTHN_QUERY_PARAM = "forceAuthn_";
 
     public OxAuthReuseResultByAcr() {
 
         authnContextLookupStrategy = new ChildContextLookup<ProfileRequestContext,AuthenticationContext>(AuthenticationContext.class);
+        gluuScratchContextLookupStrategy = new ChildContextLookup<>(GluuScratchContext.class);
     }
 
     @Override
     public boolean test(ProfileRequestContext profileRequestContext) {
 
         final AuthenticationContext authnContext = authnContextLookupStrategy.apply(profileRequestContext);
+        final GluuScratchContext gScratchContext = gluuScratchContextLookupStrategy.apply(profileRequestContext);
         if(authnContext == null) {
             //In principle this should not happen 
             LOG.debug("No Authentication context found. Re-using result");
             return true;
         }
 
+        if(isForceAuthn(authnContext, gScratchContext)) {
+            // do not re-use the authentication result
+            LOG.debug("forcedAuthn enabled. Not-reusing results.");
+            return false;
+        }
+
         Map<String,AuthenticationResult> activeResultsMap = authnContext.getActiveResults();
         if(!activeResultsMap.containsKey(OX_AUTH_FLOW_ID)) {
             LOG.debug("Session does not have any authn/oxAuth results. Re-using authentication result");
@@ -102,5 +113,20 @@ private final List<String> determineAcrs(ProfileRequestContext profileRequestCon
 
         return acrs;
     }
+
+    private final boolean isForceAuthn(final AuthenticationContext authnContext, final GluuScratchContext gsContext) {
+
+        if(authnContext.isForceAuthn() && gsContext == null) {
+            return true;
+        }
+
+        final String forceauthnqueryparam = gsContext.getExtraHttpParameter(FORCE_AUTHN_QUERY_PARAM);
+        if(forceauthnqueryparam == null) {
+
+            return authnContext.isForceAuthn();
+        }
+
+        return forceauthnqueryparam.equalsIgnoreCase("true");
+    }
 
 }

oxShibboleth/shib-oxauth-authn/src/main/java/org/gluu/idp/externalauth/ShibOxAuthAuthServlet.java

@@ -86,6 +86,7 @@ public class ShibOxAuthAuthServlet extends HttpServlet {
     private final String OXAUTH_PARAM_ENTITY_ID = "entityId";
     private final String OXAUTH_PARAM_ISSUER_ID = "issuerId";
     private final String OXAUTH_PARAM_EXTRA_PARAMS = "extraParameters";
+    private final String FORCE_AUTHN_REQUEST_PARAM = "forceAuthn_";
     private final String OXAUTH_ATTRIBIUTE_SEND_END_SESSION_REQUEST = "sendEndSession";
 
     public final static String OXAUTH_ACR_USED = "acr_used";
@@ -173,7 +174,21 @@ public String getParameter(String name) {
             final String flowExecutionKey = ExternalAuthentication.startExternalAuthentication(externalRequest);
 
             // Get external authentication properties
-            final boolean force = Boolean.parseBoolean(request.getAttribute(ExternalAuthentication.FORCE_AUTHN_PARAM).toString());
+            boolean force = Boolean.parseBoolean(request.getAttribute(ExternalAuthentication.FORCE_AUTHN_PARAM).toString());
+            //override this if the forceAuthn_ request parameter is true
+            final ProfileRequestContext prContext = ExternalAuthentication.getProfileRequestContext(flowExecutionKey,request);
+            final GluuScratchContext gsContext = prContext.getSubcontext(GluuScratchContext.class);
+            if(gsContext != null && gsContext.hasExtraHttpParameter(FORCE_AUTHN_REQUEST_PARAM)) {
+                LOG.info("Force authn parameter");
+                final String forceAuthnParamValue = gsContext.getExtraHttpParameter(FORCE_AUTHN_REQUEST_PARAM);
+                if(forceAuthnParamValue.equals("true")) {
+                    force = true;
+                    LOG.info("Force authn parameter is true.");
+                }
+            }else {
+                LOG.info("No force authn parameter");
+            }
+
 
             // It's an authentication
             if (!authorizationResponse) {