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Re: [ecf-dev] user authentication and user dependent services
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Hi Peter,
On 6/29/2015 4:11 AM, Peter Hermsdorf wrote:
Hi,
I have a use case, where a client/consumer needs to authenticate at
the server/provider and the actual service implementation on the
server needs the authentication information (at least the username)
when called.
My current solution is to make the username part of the API. eg.
String myService(String username, String otherparameters);
But it would be nice to have access to the actual Authentication
information of the caller to use them.
So that I understand: What you mean by 'authentication information' is
the information passed by the client to the server upon initial
connection, correct?
I have implemented a custom HostContainerSelector which registers a
IConnectHandlerPolicy to handle to authentication. But I have no idea
on how to access them in my service implementation (probably I need to
call some ECF API....)
Do you somehow store/maintain the association between the client (i.e.
the clientID) and the authentication information? If you do, then you
should be able to access this information later (i.e. when the remote
call is made).
The use case is access control, eg. depending on your username/login
you can "see" different content. When making the username part of the
API a authenticated client could pretend being someone else by just
calling the service with a different username.
I could imagine a kind of wrapper code on server side which intercept
the service call and "substitutes" the username in the service call
before the actual service is called. This would have the benefit of
decoupling this authentication/user handling stuff from the actual
service implementation. (the service wouldn't need to know anything
about ECF and user management)
Thanks for any hints and ideas!
If I've understood your use case correctly (above questions), then I can
think of a couple of approaches. One that I've done myself is to have
some other OSGi service for storing/retrieving the association between
the clientID and the username/pw/auth info. Then you could store that
association away upon connect/disconnect (or at some other point in the
protocol...e.g. if you have some other login service), and then look it
up/check it in response to a remote call. There is a way with existing
API to get the clientID/fromID for every remote call.
Another way would be to keep the above association info not as a
separate service but as some state on the host container. Perhaps not
as clean IMHO, but possibly serviceable.
There are other ways, but before going further let's make sure I'm
understanding you correctly.
Thanks,
Scott
