The PicketLink Service Provider relies on the PicketLink Identity Provider to assert information about a user via an electronic user credential, leaving the service provider to manage access control and dissemination based on a trusted set of user credential assertions.
Please have a look at the PicketLink Quickstarts to obtain service provider applications. The quickstarts are useful resources where you can get configuration files.
The best way to create your own Service Provider implementation is using one of the examples provided by the PicketLink Quickstarts.
You should also take a look at the following documentations: