The work we are undertaking within WildFly we have some cases where
mechanisms require a modifiable store but these are fairly limited.
On 15/10/15 19:05, Rudy De Busscher wrote:
> Hi All,
>
> Is my assumption correct that (in most cases) you would use the
> 'read-only identity store' to determine the correctness of the credentials?
>
> Is the use of CDI.current() then the only option to get a reference to
> the store, or what is the relation between these 2 concepts.
>
>
> best regards
> Rudy
>
>
> On 15 October 2015 at 13:13, arjan tijms <arjan.tijms_at_gmail.com
> <mailto:arjan.tijms_at_gmail.com>> wrote:
>
> Hi
>
> On Thu, Oct 15, 2015 at 3:45 AM, Alex Kosowski
> <alex.kosowski_at_oracle.com <mailto:alex.kosowski_at_oracle.com>> wrote:
> > A. Standardize a simple authenticator, by simplifying JASPIC SAM usage:
>
> +1 on this, of course ;)
>
>
> > Install a SAM programmatically using a single method call (e.g.
> > Jaspic.registerServerAuthModule)
>
> This is by itself pretty straightforward. In the simplest version this
> method takes an instance of the SAM and registers that single instance
> as the one and only SAM for the Servlet container.
>
> An example of that can be seen here:
> https://github.com/javaee-samples/javaee7-samples/blob/master/jaspic/common/src/main/java/org/javaee7/jaspic/common/JaspicUtils.java#L23
>
> Many projects out there in the wild that I've seen use highly
> similar code.
>
> There are two things to keep in mind for this variant:
>
> 1. The SAM here is a plain class. It can -use- the CDI API via
> CDI.current(), but is itself not a CDI bean (it's not injectable or
> scoped)
>
> 2. Following 1, but perhaps good to mention explicitly; there's only a
> single instance of the SAM and it has to be thread-safe. Just like a
> Servlet. The "handler" that it gets from the container is thead-safe
> though.
>
> An alternative (or additional) approach is that the input paramater is
> a Class<T>, and we'll promise to obtain a reference to that class
> using CDI.
>
>
>
> > Install a SAM using an Annotation (e.g. @Authenticator(<SAM class>,
> > <options>) )
>
> Instead of @Authenticator it may be better to use the term
> @AuthenticationMechanism here, as "authenticator" is yet another term
> and even one that's unfortunately ambiguous in its existing usage
> (some servers use this term for what we now call an "identity store').
>
> Just like with the identity store, I think we have two variants here
> for the annotation;
>
> 1. Making an application provided SAM directly available
> 2. Registering a SAM that was provided by a library (or, who knows,
> the spec later on)
>
> Example of the first variant:
>
> @ApplicationScoped
> @AuthenticationMechanism
> public class BasicAuthModule extends HttpServerAuthModule {
>
> @Inject
> private IdentityStore identityStore;
>
> @Override
> public AuthStatus validateHttpRequest(HttpServletRequest request,
> HttpServletResponse response, HttpMsgContext httpMsgContext) throws
> AuthException {
>
> // get credendials, use identityStore, get authresult back
>
> if (httpMsgContext.isProtected()) {
> response.setHeader("WWW-Authenticate", "Basic realm=\"test
> realm:\"");
> return httpMsgContext.responseUnAuthorized();
> }
>
> return httpMsgContext.doNothing();
> }
> }
>
> The @AuthenticationMechanism may even be omitted if we say that just
> like with the IdentityStore there should only be one injectable
> "HttpServerAuthModule" on the classpath.
>
>
>
> > Simplify SAM development for servlet based authentication (e.g.
> > HttpServerAuthModule, HttpMessageContext)
>
> To sum up for those who haven't read all the issues; this is basically
> what HttpServlet is to GenericServlet.
>
> In my prototype HttpServerAuthModule is a base class that actual
> authentication modules have to extend. This wasn't done because of any
> architectural preference for base classes, but just because it was
> easy to prototype.
>
> One note about HttpMessageContext; this is a convenience object that
> can be used within a SAM, but only within a SAM. As such it's just
> like FacesContext in JSF or a ServletContext or even
> HttpServletRequest in Servlet. All those objects should not be used
> arbitrarily, but of course only within the context where they are
> valid.
>
> Kind regards,
> Arjan Tijms
>
>