FW: AttributeFinderModule is not called and PDP don't work with myattribute designators

[Sara Sánchez <sarasanchez1980@hotmail.es>]

Hi all,

My problem with the use of Sun's XACML Implementation is that my DesignatorPDP.java (i think) don't recognize the attributedesignator that i have implementated and the policies cannot be correctly validated.

I explain my development:

1. The request that the PDP is going to receive have as subject:

  <Subject>
    <Attribute AttributeId="userName/subject#user"
               DataType="http://www.w3.org/2001/XMLSchema#string">
     <AttributeValue>Beatriz</AttributeValue>
     
   </Attribute>
 
 <Attribute AttributeId="babyName/subject#baby"
               DataType="http://www.w3.org/2001/XMLSchema#string">
     <AttributeValue>baby 1</AttributeValue>
     
   </Attribute>
  </Subject>

2. The policy that i have created need to use userName/subject#user, babyName/subject#baby and urn:oasis:names:tc:xacml:1.0:resource:resource-id with attribute designators. I think that here, i don't have problem.

3. I have read that if i need to use attribute designators, i have to create a class that implements AttributeFinderModule. i did it. One for the attributeDesignator userName/subject#user and other for babyName/subject#baby (i implemented one class too but don't work). I think that my implementation in this point is correct. (I put supportedIds, designatorsTypes, true for isdesignatorsupported and for findAttribute i check that the call is correct and, later, i look for the subject attribute in the context)

4. my PDP is very similar to the SimplePDP that Sun's implementation includes but I add the attribute modules in the attribute finder and initialize the pdp with pdp = new PDP(new PDPConfig(attributeFinder, policyFinder, null)); I always use the constructor: "public DesignatorPDP(String [] policyFiles) throws Exception" similar to SimplePDP.java.

For evaluate my development, i use the SimplePDP way. It's:

    public ResponseCtx evaluate(String requestFile) throws IOException, ParsingException  {
        // setup the request based on the file
        RequestCtx request =
            RequestCtx.getInstance(new FileInputStream(requestFile));

              
        // evaluate the request
        return pdp.evaluate(request);
             
    }



This is my implementation and changes. I don't know why when i try to use it, this doesn't work. I do the next:
             //Try create PDP with policies
            DesignatorPDP pdp = new DesignatorPDP(policyFilesPaths);
           
             //Evaluate request in pdp
            ResponseCtx response = pdp.evaluate(requestFile);

The response that i obtain is incorrect and the attribute modules that i have created are not called. so i don't know what values use the PDP for validate the policies but i think they are incorrect.

Have i forgotten some step in my development? I'm desperate with my tests. i don't know what more prove.

Thanks,

Sara

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