KEYCLOAK-3318 Documentation for parameters forwarding from adapter. More docs for prompt and max_age

SUMMARY.adoc

@@ -29,6 +29,7 @@
       ... link:topics/oidc/java/adapter-context.adoc[Security Context]
       ... link:topics/oidc/java/adapter_error_handling.adoc[Error Handling]
       ... link:topics/oidc/java/logout.adoc[Logout]
+      ... link:topics/oidc/java/params_forwarding.adoc[Parameters Forwarding]
       ... link:topics/oidc/java/multi-tenancy.adoc[Multi Tenancy]
       ... link:topics/oidc/java/application-clustering.adoc[Application Clustering]
 

topics/oidc/java/params_forwarding.adoc

@@ -0,0 +1,32 @@
+
+==== Parameters Forwarding
+
+The {{book.project.name}}  initial authorization endpoint request has support for various parameters. Most of the parameters are described in
+http://openid.net/specs/openid-connect-core-1_0.html#AuthorizationEndpoint[OIDC specification] . Some parameters are added automatically by adapter based
+on the adapter configuration. However there are also few parameters, which can be added on per-invocation basis. When you open the secured application URI,
+the particular parameter will be forwarded to the {{book.project.name}} authorization endpoint.
+
+For example, if you request offline token, then you can open the secured application URI with the `scope` parameter like:
+
+[source]
+----
+http://myappserver/mysecuredapp?scope=offline_access
+----
+
+and the parameter `scope=offline_access` will be automatically forwarded to the {{book.project.name}} authorization endpoint.
+
+The supported parameters are actually:
+
+* scope
+
+* prompt
+
+* max_age
+
+* login_hint
+
+* kc_idp_hint
+
+Most of the parameters are described in the http://openid.net/specs/openid-connect-core-1_0.html#AuthorizationEndpoint[OIDC specification].
+The only exception is parameter `kc_idp_hint`, which is specific to {{book.project.name}} and contains the name of Identity provider to automatically use.
+More info in {{book.adminguide.link}}[{{book.adminguide.name}}] in `Identity Brokering` section.

topics/oidc/javascript-adapter.adoc

@@ -255,7 +255,8 @@ Redirects to login form on (options is an optional object with redirectUri and/o
 Options is an Object, where: 
 
 * redirectUri - Specifies the uri to redirect to after login.
-* prompt - By default the login screen is displayed if the user is not logged-in to {{book.project.name}}. To only authenticate to the application if the user is already logged-in and not display the login page if the user is not logged-in, set this option to `none`.
+* prompt - By default the login screen is displayed if the user is not logged-in to {{book.project.name}}. To only authenticate to the application if the user is already logged-in and not display the login page if the user is not logged-in, set this option to `none`. To always require re-authentication and ignore SSO, set this option to `login` .
+* maxAge - Used just if user is already authenticated. Specifies maximum time since the authentication of user happened. If user is already authenticated for longer time than `maxAge`, the SSO is ignored and he will need to re-authenticate again.
 * loginHint - Used to pre-fill the username/email field on the login form.
 * action - If value is 'register' then user is redirected to registration page, otherwise to login page.
 * locale - Specifies the desired locale for the UI.
@@ -264,10 +265,7 @@ Options is an Object, where:
 
 Returns the URL to login form on (options is an optional object with redirectUri and/or prompt fields).
 
-Options is an Object, where: 
-
-* redirectUri - Specifies the uri to redirect to after login.
-* prompt - Can be set to 'none' to check if the user is logged in already (if not logged in, a login form is not displayed).
+Options is an Object, which supports same options like the function `login` .
 
 ====== logout(options)