NAME

       Authen::CAS::Client - Provides an easy-to-use interface for authentication using JA-SIG's Central
       Authentication Service

SYNOPSIS

         use Authen::CAS::Client;

         my $cas = Authen::CAS::Client->new( 'https://example.com/cas' );

         # generate an HTTP redirect to the CAS login URL
         my $r = HTTP::Response->new( 302 );
         $r->header( Location => $cas->login_url );

         # generate an HTTP redirect to the CAS logout URL
         my $r = HTTP::Response->new( 302 );
         $r->header( Location => $cas->logout_url );

         # validate a service ticket (CAS v1.0)
         my $r = $cas->validate( $service, $ticket );
         if( $r->is_success ) {
           print "User authenticated as: ", $r->user, "\n";
         }

         # validate a service ticket (CAS v2.0)
         my $r = $cas->service_validate( $service, $ticket );
         if( $r->is_success ) {
           print "User authenticated as: ", $r->user, "\n";
         }

         # validate a service/proxy ticket (CAS v2.0)
         my $r = $cas->proxy_validate( $service, $ticket );
         if( $r->is_success ) {
           print "User authenticated as: ", $r->user, "\n";
           print "Proxied through:\n";
           print "  $_\n"
             for $r->proxies;
         }

         # validate a service ticket and request a proxy ticket (CAS v2.0)
         my $r = $cas->service_validate( $server, $ticket, pgtUrl => $url );
         if( $r->is_success ) {
           print "User authenticated as: ", $r->user, "\n";

           unless( defined $r->iou ) {
             print "Service validation for proxying failed\n";
           }
           else {
             print "Proxy granting ticket IOU: ", $r->iou, "\n";

             ...
             # map IOU to proxy granting ticket via request to pgtUrl
             ...

             $r = $cas->proxy( $pgt, $target_service );
             if( $r->is_success ) {
               print "Proxy ticket issued: ", $r->proxy_ticket, "\n";
             }
           }
         }

DESCRIPTION

       The Authen::CAS::Client module provides a simple interface for authenticating users using JA-SIG's CAS
       protocol.  Both CAS v1.0 and v2.0 are supported.

METHODS

   new $url [, %args]
       "new()" creates an instance of an "Authen::CAS::Client" object.  $url refers to the CAS server's base
       URL.  %args may contain the following optional parameter:

       fatal => $boolean

       If this argument is true, the CAS client will "die()" when an error occurs and $@ will contain the error
       message.  Otherwise an "Authen::CAS::Client::Response::Error" object will be returned.  See
       Authen::CAS::Client::Response for more detail on response objects.

   login_url $service [, %args]
       "login_url()" returns the CAS server's login URL which can be used to redirect users to start the
       authentication process.  $service is the service identifier that will be used during validation requests.
       %args may contain the following optional parameters:

       renew => $boolean

       This causes the CAS server to force a user to re-authenticate even if an SSO session is already present
       for that user.

       gateway => $boolean

       This causes the CAS server to only rely on SSO sessions for authentication.  If an SSO session is not
       available for the current user, validation will result in a failure.

   logout_url [%args]
       "logout_url()" returns the CAS server's logout URL which can be used to redirect users to end
       authenticated sessions.  %args may contain the following optional parameter:

       url => $url

       If present, the CAS server will present the user with a link to the given URL once the user has logged
       out.

   validate $service, $ticket [, %args]
       "validate()" attempts to validate a service ticket using the CAS v1.0 protocol.  $service is the service
       identifier that was passed to the CAS server during the login process.  $ticket is the service ticket
       that was received after a successful authentication attempt.  Returns an appropriate
       Authen::CAS::Client::Response object.  %args may contain the following optional parameter:

       renew => $boolean

       This will cause the CAS server to respond with a failure if authentication validation was done via a CAS
       SSO session.

   service_validate $service, $ticket [, %args]
       "service_validate()" attempts to validate a service ticket using the CAS v2.0 protocol.  This is similar
       to "validate()", but allows for greater flexibility when there is a need for proxying authentication to
       back-end services.  The $service and $ticket parameters are the same as above.  Returns an appropriate
       Authen::CAS::Client::Response object.  %args may contain the following optional parameters:

       renew => $boolean

       This will cause the CAS server to respond with a failure if authentication validation was done via a CAS
       SSO session.

       pgtUrl => $url

       This tells the CAS server that a proxy ticket needs to be issued for proxying authentication to a back-
       end service.  $url corresponds to a callback URL that the CAS server will use to verify the service's
       identity.  Per the CAS specification, this URL must be HTTPS.  If this verification fails, normal
       validation will occur, but a proxy granting ticket IOU will not be issued.

       Also note that this call will block until the CAS server completes its service verification attempt.  The
       returned proxy granting ticket IOU can then be used to retrieve the proxy granting ticket that was passed
       as a parameter to the given URL.

   proxy_validate $service, $ticket [, %args]
       "proxy_validate()" is almost identical in operation to "service_validate()" except that both service
       tickets and proxy tickets can be used for validation and a list of proxies will be provided if proxied
       authentication has been used.  The $service and $ticket parameters are the same as above.  Returns an
       appropriate Authen::CAS::Client::Response object.  %args may contain the following optional parameters:

       renew => $boolean

       This is the same as described above.

       pgtUrl => $url

       This is the same as described above.

   proxy $pgt, $target
       "proxy()" is used to retrieve a proxy ticket that can be passed to a back-end service for proxied
       authentication.  $pgt is the proxy granting ticket that was passed as a parameter to the "pgtUrl"
       specified in either "service_validate()" or "proxy_validate()".  $target is the service identifier for
       the back-end system that will be using the returned proxy ticket for validation.  Returns an appropriate
       Authen::CAS::Client::Response object.

BUGS

       None are known at this time, but if you find one, please feel free to submit a report to the author.

AUTHOR

       jason hord <pravus@cpan.org>

SEE ALSO

       Authen::CAS::Client::Response

       More information about CAS can be found at JA-SIG's CAS homepage: <http://www.ja-sig.org/products/cas/>

LICENSE

       This software is information.  It is subject only to local laws of physics.

perl v5.36.0                                       2022-10-13                           Authen::CAS::Client(3pm)