Friday, April 1, 2016

Identity Patterns with the WSO2 Identity Server
Fine-grained access control for SOAP services

Problem:
  • Access to the business services must be done in a fine-grained manner. 
  • Only the users belong to the business-admin role should be able to access foo and bar SOAP services during a weekday from 8 AM to 5 PM.
Solution:
  • Deploy WSO2 Identity Server as a XACML PDP (Policy Decision Point). 
  • Define XACML policies via the XACML PAP (Policy Administration Point) of the WSO2 Identity Server. 
  • Front the SOAP services with WSO2 ESB and represent each service a proxy service in the ESB. 
  • Engage the Entitlement mediator to the in-sequence of the proxy service, which needs to be protected. The Entitlement mediator will point to the WSO2 Identity Server’s XACML PDP. 
  • All the requests to the SOAP service will be intercepted by the Entitlement mediator and will talk to the WSO2 Identity Server’s XACML PDP to check whether the user is authorized to access the service. 
  • Authentication to the SOAP service should happen at the edge of the WSO2 ESB, prior to Entitlement mediator. 
  • If the request to the SOAP service brings certain attributes in the SOAP message itself, the Entitlement mediator can extract them from the SOAP message and add to the XACML request. 
  • Products: WSO2 Identity Server 4.0.0+, WSO2 ESB, Governance Registry 

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