​Within the tenant story, when the SP is enable SAAS, is that possible to
use logged in user's tenant specific XACML policy to use as authorization
policy in above framework instead of using SP's tenant XACML policy ? ​

*Harsha Thirimanna*
Associate Tech Lead | WSO2

Email: hars...@wso2.com
Mob: +94715186770
Blog: http://harshathirimanna.blogspot.com/
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On Wed, Oct 19, 2016 at 1:20 AM, Pulasthi Mahawithana <pulast...@wso2.com>

> Hi All,
> As per the current implementation of the Identity Server's authentication
> framework, it does not provide any OOTB authorization mechanism for the
> service providers. We are going to provide this capability to Identity
> server so that the users can be authorized to service providers using rules
> based on user attributes, userstore, time of the day, etc.
> Following is the proposed sequence for the implementation.
> [image: Inline image 1]
> The existing authentication flow is kept as is until the authentication
> steps are completed and authentication result decided. At the
> AuthenticationRequestHandler (after authentication) if the authentication
> is success, we will be calling an AuthorizationHandler with the
> authentication context. AuthenticationHandler is responsible for evaluating
> the configured policies and responding back whether the user is authorized
> or not. If the authorization is not required or handled by the SP
> itself, we'll be providing the capability of bypassing the authorization
> step per service provider .
> The default implementation of the AuthorizationHandler will be using the
> IS's XACML engine for authorization. It will send a XACML request to the
> PDP and the request will be evaluated against the policies published to the
> PDP. Admins can write XACML policies and publish them to allow/deny the
> users logging into SPs based on those policies.
> Also, to retrieve the basic authentication context values (such as SP
> Name, authenticated user's username/userstore/tenant) we will provide a
> default PIP. In case any complex or derived attributes are needed we can
> retrieve them by writing a custom PIP and use them in the policies.
> Please share your thoughts and suggestions.
> --
> *Pulasthi Mahawithana*
> Senior Software Engineer
> WSO2 Inc., http://wso2.com/
> Mobile: +94-71-5179022
> Blog: http://blog.pulasthi.org
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