I worked with the below policy and i am unable to understand the XACML Response.
The policy which i am using is
<Policy xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" PolicyId="TestPolicy" RuleCombiningAlgId="urn:oasis:names:tc:xacml:1.0:rule-combining-algorithm:first-applicable" Version="1.0">
<Target>
<AnyOf>
<AllOf>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">foo1</AttributeValue>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
</Match>
</AllOf>
<AllOf>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">foo2</AttributeValue>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
</Match>
</AllOf>
</AnyOf>
</Target>
<Rule Effect="Permit" RuleId="Rule-1">
<Condition>
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:and">
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-at-least-one-member-of">
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-bag">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">read</AttributeValue>
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">write</AttributeValue>
</Apply>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
</Apply>
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-at-least-one-member-of">
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-bag">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">bob1</AttributeValue>
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">bob2</AttributeValue>
</Apply>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
</Apply>
</Apply>
</Condition>
</Rule>
<Rule Effect="Deny" RuleId="Deny-Rule"/>
</Policy>
XACML Request
<Request xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" CombinedDecision="false" ReturnPolicyIdList="true">
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" IncludeInResult="true">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">read</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" IncludeInResult="true">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">write</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">bob2</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id" IncludeInResult="true">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">index.jsp</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id" IncludeInResult="true">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Descendants</AttributeValue>
</Attribute>
</Attributes>
</Request>
XACML Response
<Response xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17">
<Result>
<Decision>Permit</Decision>
<Status>
<StatusCode Value="urn:oasis:names:tc:xacml:1.0:status:ok"/>
</Status>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id" IncludeInResult="true">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">foo2</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" IncludeInResult="true">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">read</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id" IncludeInResult="true">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">foo1</AttributeValue>
</Attribute>
</Attributes>
</Result>
<Result>
<Decision>Permit</Decision>
<Status>
<StatusCode Value="urn:oasis:names:tc:xacml:1.0:status:ok"/>
</Status>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" IncludeInResult="true">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">read</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id" IncludeInResult="true">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">foo2</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" IncludeInResult="true">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">write</AttributeValue>
</Attribute>
</Attributes>
</Result>
<Result>
<Decision>Permit</Decision>
<Status>
<StatusCode Value="urn:oasis:names:tc:xacml:1.0:status:ok"/>
</Status>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" IncludeInResult="true">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">write</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" IncludeInResult="true">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">read</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id" IncludeInResult="true">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">foo1</AttributeValue>
</Attribute>
</Attributes>
</Result>
<Result>
<Decision>Permit</Decision>
<Status>
<StatusCode Value="urn:oasis:names:tc:xacml:1.0:status:ok"/>
</Status>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" IncludeInResult="true">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">write</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id" IncludeInResult="true">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">foo1</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id" IncludeInResult="true">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">foo2</AttributeValue>
</Attribute>
</Attributes>
</Result>
</Response>
From this XACML Response i got four Result decisions as Permit ,
First Result decision is Permit and it means foo1 and foo2 resources can be READ by the user bob2 .
Second Result decision is Permit and it means foo2 resource can be READ and WRITE by the user bob2.
Third Result decision is Permit and it means foo1 resource can be READ and WRITE by the user bob2.
Fourth Result decision is Permit and it means foo1 and foo2 resources can be WRITE by the user bob2.
This is how i understood from the XACML response.Do you think my understanding is correct ? If not Please guide me how to understand the XACML Response.
I assume, you are trying the multiple decision profile with XACML 3.0. Yes you are correct. However, your given XACML request is not the correct one to provide abovr result. Therefore it is great to update it. Normally, when multiple decision profile is used, you can receive more than one results. As an example, you can as authorization for read and write actions for same request as you have done. Then XACML response contains two results. I guess you can fine more details about multiple decision profile from here
Related
I have two policies, first one should return permit, and the second should return deny, but it always returns deny to the requests.
This is the PolicySet:
<PolicySet PolicyCombiningAlgId="urn:oasis:names:tc:xacml:3.0:policy-combining-algorithm:deny-overrides" PolicySetId="http://axiomatics.com/alfa/identifier/test.testps1" Version="1.0" xmlns:xacml3="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17">
<Target/>
<Policy xmlns:xacml3="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17"
PolicyId="p2"
RuleCombiningAlgId="urn:oasis:names:tc:xacml:3.0:rule-combining-algorithm:deny-overrides"
Version="1.0">
<Target>
<AnyOf>
<AllOf>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">
C70001
</AttributeValue>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="false"/>
</Match>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">
Alise Ibrahem
</AttributeValue>
<AttributeDesignator AttributeId="subjectName" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="false"/>
</Match>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">
IT
</AttributeValue>
<AttributeDesignator AttributeId="subjectDep" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="false"/>
</Match>
</AllOf>
</AnyOf>
</Target>
<Rule Effect="Deny" RuleId="Deny_Rule">
<Target>
<AnyOf>
<AllOf>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:anyURI-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#anyURI"
>Employee</AttributeValue>
<AttributeDesignator AttributeId="subjectJob" MustBePresent="false"
Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource"
DataType="http://www.w3.org/2001/XMLSchema#anyURI"/>
</Match>
</AllOf>
</AnyOf>
<AnyOf>
<AllOf>
<Match
MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue
DataType="http://www.w3.org/2001/XMLSchema#string"
>read</AttributeValue>
<AttributeDesignator
MustBePresent="false"
Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action"
AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id"
DataType="http://www.w3.org/2001/XMLSchema#string"/>
</Match>
</AllOf>
</AnyOf>
</Target>
<AdviceExpressions>
<AdviceExpression AdviceId="not-hr-employee" AppliesTo="Deny">
<AttributeAssignmentExpression AttributeId="urn:oasis:names:tc:xacml:2.0:example:attribute:text">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">You are not allowed to get employees data</AttributeValue>
</AttributeAssignmentExpression>
</AdviceExpression>
</AdviceExpressions>
</Rule>
</Policy>
<Policy xmlns:xacml3="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" PolicyId="p1" RuleCombiningAlgId="urn:oasis:names:tc:xacml:3.0:rule-combining-algorithm:permit-overrides" Version="1.0">
<Target>
<AnyOf>
<AllOf>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">
C80001
</AttributeValue>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="false"/>
</Match>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">
Hadeel Neama
</AttributeValue>
<AttributeDesignator AttributeId="subjectName" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="false"/>
</Match>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">
HR
</AttributeValue>
<AttributeDesignator AttributeId="subjectDep" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="false"/>
</Match>
</AllOf>
</AnyOf>
</Target>
<Rule Effect="Permit" RuleId="Permit_Rule">
<Target>
<AnyOf>
<AllOf>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:anyURI-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#anyURI"
>Employee</AttributeValue>
<AttributeDesignator AttributeId="subjectJob" MustBePresent="false"
Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource"
DataType="http://www.w3.org/2001/XMLSchema#anyURI"/>
</Match>
</AllOf>
</AnyOf>
<AnyOf>
<AllOf>
<Match
MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue
DataType="http://www.w3.org/2001/XMLSchema#string"
>read</AttributeValue>
<AttributeDesignator
MustBePresent="false"
Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action"
AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id"
DataType="http://www.w3.org/2001/XMLSchema#string"/>
</Match>
</AllOf>
</AnyOf>
</Target>
</Rule>
</Policy>
</PolicySet>
XACML Request that I want it to have permit response:
<?xml version="1.0" encoding="UTF-8"?>
<Request xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" CombinedDecision="false" ReturnPolicyIdList="false">
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">read</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">C80001</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">
<Attribute AttributeId="subjectName" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Hadeel Neama</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">
<Attribute AttributeId="subjectDep" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">HR</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">
<Attribute AttributeId="subjectJob" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Employee</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource">
<Attribute AttributeId="subjectJob" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Employee</AttributeValue>
</Attribute>
</Attributes>
</Request>
Request that I want it to have permit response:
<Request xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" CombinedDecision="false" ReturnPolicyIdList="false">
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">read</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">C70001</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-Name" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Alise Ibrahem</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subjectDep" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">IT</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subjectJob" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Employee</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource">
<Attribute AttributeId="subjectJob" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Employee</AttributeValue>
</Attribute>
</Attributes>
</Request>
Response to the both of requests:
<?xml version="1.0" encoding="UTF-8"?>
<Response xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17"><Result><Decision>Deny</Decision><Status><StatusCode Value="urn:oasis:names:tc:xacml:1.0:status:ok"/></Status><AssociatedAdvice><Advice AdviceId="not-hr-employee" ><AttributeAssignment AttributeId="urn:oasis:names:tc:xacml:2.0:example:attribute:text" DataType="http://www.w3.org/2001/XMLSchema#string">
You are not allowed to get employees data</AttributeAssignment>
</Advice></AssociatedAdvice></Result><Result><Decision>Deny</Decision><Status><StatusCode Value="urn:oasis:names:tc:xacml:1.0:status:ok"/></Status><AssociatedAdvice><Advice AdviceId="not-hr-employee" ><AttributeAssignment AttributeId="urn:oasis:names:tc:xacml:2.0:example:attribute:text" DataType="http://www.w3.org/2001/XMLSchema#string">
You are not allowed to get employees data</AttributeAssignment>
</Advice></AssociatedAdvice></Result><Result><Decision>Deny</Decision><Status><StatusCode Value="urn:oasis:names:tc:xacml:1.0:status:ok"/></Status><AssociatedAdvice><Advice AdviceId="not-hr-employee" ><AttributeAssignment AttributeId="urn:oasis:names:tc:xacml:2.0:example:attribute:text" DataType="http://www.w3.org/2001/XMLSchema#string">
You are not allowed to get employees data</AttributeAssignment>
</Advice></AssociatedAdvice></Result><Result><Decision>Deny</Decision><Status><StatusCode Value="urn:oasis:names:tc:xacml:1.0:status:ok"/></Status><AssociatedAdvice><Advice AdviceId="not-hr-employee" ><AttributeAssignment AttributeId="urn:oasis:names:tc:xacml:2.0:example:attribute:text" DataType="http://www.w3.org/2001/XMLSchema#string">
You are not allowed to get employees data</AttributeAssignment>
</Advice></AssociatedAdvice></Result></Response>
===========================================================
Result is "Deny"
Advice :
You are not allowed to get employees data
This is ALFA code:
namespace test {
import Attributes.*
policy testpolicy {
target clause subjectId == "C80001"
and subjectName=="Hadeel Neama"
and subjectDep=="HR"
and subjectJob=="Employee"
apply permitOverrides
rule {
target clause job=="Employee"
and actionId == "read"
permit
}
}
}
and this's the condition that I added it to the rule:
condition subjectDep=="HR"
I just don't know why all the tries with condition fail!
I've tried this condition in Deny_Rule:
<Condition>
<Apply FunctionId="urn:oasis:names:tc:xacml:3.0:function:any-of-any">
<Function FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-equal"/>
<AttributeDesignator AttributeId="subjectDep" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="false"/>
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">
HR
</AttributeValue>
</Apply>
</Condition>
but when I send a request, it returns:
مار 13, 2019 8:32:08 م org.wso2.balana.finder.PolicyFinder findPolicy
INFO: No applicable policies were found for the request
مار 13, 2019 8:32:08 م org.wso2.balana.finder.PolicyFinder findPolicy
INFO: No applicable policies were found for the request
مار 13, 2019 8:32:08 م org.wso2.balana.finder.PolicyFinder findPolicy
INFO: No applicable policies were found for the request
مار 13, 2019 8:32:08 م org.wso2.balana.finder.PolicyFinder findPolicy
INFO: No applicable policies were found for the request
======================== XACML Response ===================
<Response xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17"><Result><Decision>NotApplicable</Decision><Status><StatusCode Value="urn:oasis:names:tc:xacml:1.0:status:ok"/></Status></Result><Result><Decision>NotApplicable</Decision><Status><StatusCode Value="urn:oasis:names:tc:xacml:1.0:status:ok"/></Status></Result><Result><Decision>NotApplicable</Decision><Status><StatusCode Value="urn:oasis:names:tc:xacml:1.0:status:ok"/></Status></Result><Result><Decision>NotApplicable</Decision><Status><StatusCode Value="urn:oasis:names:tc:xacml:1.0:status:ok"/></Status></Result></Response>
===========================================================
Result is "Deny"
Even if I just wrote:
<Condition/>
!!!
Still a few issues to fix:
In the Policy, replace...
xmlns:xacml3="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17"
... with simply this (make xacml the default namespace like in your Request):
xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17"
Replace function anyURI-equal with string-equal
Replace datatype anyURI with string
Remove all trailing/leading newlines or blank spaces around AttributeValues that should not be there (I suspect your XML editor messed up, remember the strings are matched as is with string-equal, incl. newlines and whitespaces around, no whitespace collapse here)
In the end, here is the valid Policy:
<?xml version="1.0" encoding="UTF-8"?>
<PolicySet xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" PolicyCombiningAlgId="urn:oasis:names:tc:xacml:3.0:policy-combining-algorithm:deny-overrides" PolicySetId="http://axiomatics.com/alfa/identifier/test.testps1" Version="1.0">
<Target />
<Policy PolicyId="p2" RuleCombiningAlgId="urn:oasis:names:tc:xacml:3.0:rule-combining-algorithm:deny-overrides" Version="1.0">
<Target>
<AnyOf>
<AllOf>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">C70001</AttributeValue>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="false" />
</Match>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Alise Ibrahem</AttributeValue>
<AttributeDesignator AttributeId="subjectName" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="false" />
</Match>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">IT</AttributeValue>
<AttributeDesignator AttributeId="subjectDep" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="false" />
</Match>
</AllOf>
</AnyOf>
</Target>
<Rule Effect="Deny" RuleId="Deny_Rule">
<Target>
<AnyOf>
<AllOf>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Employee</AttributeValue>
<AttributeDesignator AttributeId="subjectJob" MustBePresent="false" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource" DataType="http://www.w3.org/2001/XMLSchema#string" />
</Match>
</AllOf>
</AnyOf>
<AnyOf>
<AllOf>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">read</AttributeValue>
<AttributeDesignator MustBePresent="false" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action" AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" DataType="http://www.w3.org/2001/XMLSchema#string" />
</Match>
</AllOf>
</AnyOf>
</Target>
<AdviceExpressions>
<AdviceExpression AdviceId="not-hr-employee" AppliesTo="Deny">
<AttributeAssignmentExpression AttributeId="urn:oasis:names:tc:xacml:2.0:example:attribute:text">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">You are not allowed to get employees data</AttributeValue>
</AttributeAssignmentExpression>
</AdviceExpression>
</AdviceExpressions>
</Rule>
</Policy>
<Policy PolicyId="p1" RuleCombiningAlgId="urn:oasis:names:tc:xacml:3.0:rule-combining-algorithm:permit-overrides" Version="1.0">
<Target>
<AnyOf>
<AllOf>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">C80001</AttributeValue>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="false" />
</Match>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Hadeel Neama</AttributeValue>
<AttributeDesignator AttributeId="subjectName" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="false" />
</Match>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">HR</AttributeValue>
<AttributeDesignator AttributeId="subjectDep" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="false" />
</Match>
</AllOf>
</AnyOf>
</Target>
<Rule Effect="Permit" RuleId="Permit_Rule">
<Target>
<AnyOf>
<AllOf>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Employee</AttributeValue>
<AttributeDesignator AttributeId="subjectJob" MustBePresent="false" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource" DataType="http://www.w3.org/2001/XMLSchema#string" />
</Match>
</AllOf>
</AnyOf>
<AnyOf>
<AllOf>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">read</AttributeValue>
<AttributeDesignator MustBePresent="false" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action" AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" DataType="http://www.w3.org/2001/XMLSchema#string" />
</Match>
</AllOf>
</AnyOf>
</Target>
</Rule>
</Policy>
</PolicySet>
--EDIT 2019-03-30--
The issue with your Requests is that you have multiple <Attributes ...> in the same Category access-subject and this is interpreted by Balana as requesting multiple decisions according to Multiple Decision Profile of XACML (see 3.3 Repeated <Attributes> categories), which is not what you want. To fix it, group all subject attributes together in one <Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">...
So here is the fixed request:
<Request xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" CombinedDecision="false" ReturnPolicyIdList="false">
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">read</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">C80001</AttributeValue>
</Attribute>
<Attribute AttributeId="subjectName" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Hadeel Neama</AttributeValue>
</Attribute>
<Attribute AttributeId="subjectDep" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">HR</AttributeValue>
</Attribute>
<Attribute AttributeId="subjectJob" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Employee</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource">
<Attribute AttributeId="subjectJob" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Employee</AttributeValue>
</Attribute>
</Attributes>
</Request>
Hitting this Policy with this fixed request (Hadeel Neama in HR) returns Permit, which is what you expect.
In the second Request, there is a mistake on the subjectName attribute: replace wrong AttributeId urn:oasis:names:tc:xacml:1.0:subject:subject-Name with subjectName to match the AttributeId in the Policy.
With this extra fix, the second Request (Alise Ibrahem in IT department) returns Deny.
Validated with AuthzForce.
I have a XACML 3.0 policy defined like this:
<?xml version="1.0" encoding="UTF-8"?>
<Policy
xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17"
xmlns:xacml="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17 http://docs.oasis-open.org/xacml/3.0/xacml-core-v3-schema-wd-17.xsd" PolicyId="Proposal-Rules" RuleCombiningAlgId="urn:oasis:names:tc:xacml:1.0:rule-combining-algorithm:deny-overrides" Version="1.0">
<Description>Policy for any proposal.</Description>
<PolicyDefaults>
<XPathVersion>http://www.w3.org/TR/1999/REC-xpath-19991116</XPathVersion>
</PolicyDefaults>
<Target />
<Rule Effect="Permit" RuleId="ApproveProposalByDepartmentChair-Rule13a">
<Description>"Department Chair" can "Approve" a "Whole Proposal" when ApprovedByDepartmentChair = READYFORAPPROVAL and where condition check all department chairs are not approved.</Description>
<Target>
<AnyOf>
<AllOf>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Department Chair</AttributeValue>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:subject:position.title" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="false" />
</Match>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Whole Proposal</AttributeValue>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:resource:proposal.section" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="false" />
</Match>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">READYFORAPPROVAL</AttributeValue>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:resource:ApprovedByDepartmentChair" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="false" />
</Match>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Approve</AttributeValue>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:action:proposal.action" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="false" />
</Match>
</AllOf>
</AnyOf>
</Target>
<Condition>
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:boolean-equal">
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:boolean-one-and-only">
<AttributeSelector MustBePresent="false" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource" Path="//ak:signedByAllChairs/text()" DataType="http://www.w3.org/2001/XMLSchema#boolean"/>
</Apply>
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#boolean">false</AttributeValue>
</Apply>
</Condition>
</Rule>
</Policy>
My XACML request looks like this with an extra AttributeId="group" containing value "Computer Engineering".
<Request xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" CombinedDecision="false" ReturnPolicyIdList="false">
<Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:subject:position.title" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Department Chair</AttributeValue>
</Attribute>
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:subject:group" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Computer Engineering</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource">
<Content>
<record xmlns:ak="http://akpower.org">
<proposal>
<signedByAllChairs>false</signedByAllChairs>
</proposal>
</record>
</Content>
<Attribute AttributeId="urn:oasis:names:tc:xacml:3.0:content-selector" IncludeInResult="false">
<AttributeValue XPathCategory="urn:oasis:names:tc:xacml:3.0:attribute-category:resource" DataType="urn:oasis:names:tc:xacml:3.0:data-type:xpathExpression">//ak:record/ak:proposal</AttributeValue>
</Attribute>
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:resource:ApprovedByDepartmentChair" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">READYFORAPPROVAL</AttributeValue>
</Attribute>
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:resource:proposal.section" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Whole Proposal</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:action:proposal.action" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Approve</AttributeValue>
</Attribute>
</Attributes>
</Request>
I was hoping the PEP going to return NotApplicable but on contrary it returns following response: with PERMIT
Even though the defined Policy Rule doesn't contain any Attribute called "group" as Rule Target whereas the request is sending "group" attribute with value "Computer Engineering" and even it is returning match and PERMIT response!
<Response xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17">
<Result>
<Decision>Permit</Decision>
<Status>
<StatusCode Value="urn:oasis:names:tc:xacml:1.0:status:ok" />
</Status>
</Result>
</Response>
Is there something I am missing? I could not figure it out. I am currently using Balana as PEP implementation for my application.
I have now managed to import your policy inside the Axiomatics Policy Administration Point.
Basic Issues
You had several mistakes:
Your XPath expressions uses a prefix ak: (Path="//ak:signedByAllChairs/text()") but the XPath doesn't contain the definition for ak:
The AttributeSelector is marked as a boolean but text() in XPath returns a string, not a boolean. You need to change to string.
The XML snippet part of the XACML request <Content/> does not actually use the ak: prefix. It does define a namespace with that prefix but never uses it.
Representation of the policy in APS
Simulating the policy
I simulated your policy and did not get a Permit back. I get Indeterminate. Here is the evaluation trace. There must be something wrong in WSO2 IS or you forgot to deploy the new policy.
Now, if I clean up the XML you send to have exactly this:
<record xmlns:ak="http://akpower.org">
<proposal>
<signedByAllChairs>false</signedByAllChairs>
</proposal>
</record>
then I get Permit back from the policy.
I'm trying to build a policy that would receive from the request a list of attributes and an attribute, check if the single attribute is inside the list and permit based on that. I'm still a newbie, so I might have overlooked something.
What I've come up with is a slightly modified version of XACML type for bags.
When evaluated with the WSO2 TryIt tool by itself, the result is Permit. Same thing happens if this is the only enabled policy on the server. If I enable other policies it responds with Indeterminate/Couldn't find AttributeDesignator attribute.
The same does not happen when I make requests that hit other policies. Other policies returns the expected results, although none include lists.
Why does it do that and how can I mitigate it?
Policy:
<xacml3:Policy xmlns:xacml3="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" PolicyId="county-based-3" RuleCombiningAlgId="urn:oasis:names:tc:xacml:1.0:rule-combining-algorithm:first-applicable" Version="1.0">
<xacml3:Description></xacml3:Description>
<xacml3:Target>
<xacml3:AnyOf>
<xacml3:AllOf>
<xacml3:Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<xacml3:AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">bay</xacml3:AttributeValue>
<xacml3:AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"></xacml3:AttributeDesignator>
</xacml3:Match>
</xacml3:AllOf>
</xacml3:AnyOf>
</xacml3:Target>
<xacml3:Rule Effect="Permit" RuleId="http://axiomatics.com/alfa/identifier/stackoverflow.example.checkGroup">
<xacml3:Description></xacml3:Description>
<xacml3:Target></xacml3:Target>
<xacml3:Condition>
<xacml3:Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-at-least-one-member-of">
<xacml3:AttributeDesignator AttributeId="test:xacml:1.0:county" DataType="http://www.w3.org/2001/XMLSchema#string" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource" MustBePresent="false"></xacml3:AttributeDesignator>
<xacml3:AttributeDesignator AttributeId="test:xacml:1.0:counties" DataType="http://www.w3.org/2001/XMLSchema#string" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" MustBePresent="false"></xacml3:AttributeDesignator>
</xacml3:Apply>
</xacml3:Condition>
</xacml3:Rule>
<xacml3:Rule Effect="Deny" RuleId="deny-rule"></xacml3:Rule>
</xacml3:Policy>
The request that goes with it:
<Request xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" CombinedDecision="false" ReturnPolicyIdList="true">
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource">
<Attribute AttributeId="test:xacml:1.0:county" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">travis</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">
<Attribute AttributeId="test:xacml:1.0:counties" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">travis</AttributeValue>
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">brazoria</AttributeValue>
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">dallas</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">bay</AttributeValue>
</Attribute>
</Attributes>
</Request>
Indeterminate response:
<Response xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17">
<Result>
<Decision>Indeterminate</Decision>
<Status>
<StatusCode Value="urn:oasis:names:tc:xacml:1.0:status:processing-error"/>
<StatusMessage>Couldn't find AttributeDesignator attribute</StatusMessage>
</Status>
</Result>
</Response>
An example Policy and Request that, when enabled, make the server exhibit this problem:
<Policy xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" PolicyId="TestingStuff" RuleCombiningAlgId="urn:oasis:names:tc:xacml:3.0:rule-combining-algorithm:deny-overrides" Version="1.0">
<Target>
<AnyOf>
<AllOf>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-regexp-match">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">creaky</AttributeValue>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
</Match>
</AllOf>
</AnyOf>
</Target>
<Rule Effect="Permit" RuleId="Stuff">
<Target>
<AnyOf>
<AllOf>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">grease</AttributeValue>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
</Match>
</AllOf>
<AllOf>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">break</AttributeValue>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
</Match>
</AllOf>
</AnyOf>
</Target>
<Condition>
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:or">
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-one-and-only">
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
</Apply>
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">someHuman</AttributeValue>
</Apply>
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-one-and-only">
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
</Apply>
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Martin</AttributeValue>
</Apply>
</Apply>
</Condition>
<AdviceExpressions>
<AdviceExpression AdviceId="role" AppliesTo="Permit">
<AttributeAssignmentExpression AttributeId="role">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">mechanic</AttributeValue>
</AttributeAssignmentExpression>
</AdviceExpression>
</AdviceExpressions>
</Rule>
</Policy>
The request:
<Request xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" CombinedDecision="false" ReturnPolicyIdList="false">
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">grease</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Martin</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">creaky</AttributeValue>
</Attribute>
</Attributes>
</Request>
That is weird indeed. If I import the first policy into Axiomatics policy authoring tool (disclaimer: I work for Axiomatics) and use the simulation feature, I get the results as expected.
The simulation shows that the evaluation follows the path as shown:
I am not sure why you are seeing the behaviour you described, at your side. One thing I am not sure of is what you meant when you said "If I enable other policies" Do you reference this second policy from within the first?
first I would like to mention that this certainly a novice question, but I was looking for hours now and I do not have an answer.
I just started trying XACML for academic purposes. I use the editor provided with wso2-is to write some policies and to evaluate them against some requests.
I created this policy to express that the subject u can read or write from a resource d
<Policy xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" PolicyId="test-bis" RuleCombiningAlgId="urn:oasis:names:tc:xacml:3.0:rule-combining-algorithm:deny-overrides" Version="1.0">
<Target/>
<Rule Effect="Permit" RuleId="read-or-write">
<Target>
<AnyOf>
<AllOf>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">d</AttributeValue>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
</Match>
</AllOf>
</AnyOf>
</Target>
<Condition>
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:and">
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-at-least-one-member-of">
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-bag">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">read</AttributeValue>
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">write</AttributeValue>
</Apply>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
</Apply>
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:any-of">
<Function FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-equal"/>
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">u</AttributeValue>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
</Apply>
</Apply>
</Condition>
</Rule>
<Rule Effect="Deny" RuleId="deny"/>
</Policy>
While matching to this simple request "Can u read from d" I got not applicable as result !
Here is the request:
<Request xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" CombinedDecision="false" ReturnPolicyIdList="false">
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">read</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">u</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">d</AttributeValue>
</Attribute>
</Attributes>
</Request>
Anyone can help me on understanding what I'm doing wrong?
Thank you all!
I tested the policy and the request you sent in the Axiomatics Policy Server (disclaimer: I work for Axiomatics). The answer should in fact be Deny. Both rules triggered. You combined the rules inside a policy with a deny-overrides combining algorithm which means that Deny wins over Permit.
You can see below a screenshot of the policy simulation in APS which shows both rules being triggered and the second rule winning over the first one.
If you are interested in understanding combining algorithms better, here's the "truth table" for deny-overrides:
As you are getting "Not Applicable" it seems that your policy is either not enabled in WSO2 IS or not promoted to PDP for testing. Just check if the policy is enabled and promoted to PDP for test. You may also test the policy without promoting to PDP but in both the cases it should be in enabled mode.
I tried your policy in WSo2 IS 4.0.0 and its giving "Deny". And yes as David mentioned its because your policy combining algorithm is "deny-overrides" which is always getting "Deny" as per your default rule as below:
<Rule Effect="Deny" RuleId="deny"/>
So either you need to make your policy combining algorithm as "permit-overrides" or drop the last rule.
Yuor Request is fine and here's the Policy for your Reqirement.
<Policy xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" PolicyId="9f654de2-06d3-45c9-bb7f-947c9a9b247a" RuleCombiningAlgId="urn:oasis:names:tc:xacml:1.0:rule-combining-algorithm:first-applicable" Version="1.0">
<Target>
<AnyOf>
<AllOf>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">d</AttributeValue>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:resource:root-resource-id" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
</Match>
</AllOf>
</AnyOf>
</Target>
<Rule Effect="Permit" RuleId="Rule_write">
<Condition>
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:and">
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-at-least-one-member-of">
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-bag">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">write</AttributeValue>
</Apply>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
</Apply>
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-at-least-one-member-of">
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-bag">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">u</AttributeValue>
</Apply>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
</Apply>
</Apply>
</Condition>
</Rule>
<Rule Effect="Permit" RuleId="Rule_read">
<Condition>
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:and">
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-at-least-one-member-of">
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-bag">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">read</AttributeValue></Apply>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
</Apply><Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-at-least-one-member-of">
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-bag">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">u</AttributeValue></Apply>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"/>
</Apply>
</Apply>
</Condition>
</Rule>
<Rule Effect="Deny" RuleId="Rule_Deny_All"/>
</Policy>
Can we specify two actions in a same XACML request?
This question comes from the following example. I want to do the following:
Define a policy like: U can use READ OR WRITE functions from a resource D (example of policy is available at this previous post
Define a request like: U wants to use READ AND DELETE (or any other not permitted actions)
Get as response: deny
So here is the request:
<Request xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" CombinedDecision="false" ReturnPolicyIdList="false">
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">read</AttributeValue>
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">delete</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">u</AttributeValue>
</Attribute>
</Attributes>
<Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource">
<Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id" IncludeInResult="false">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">d</AttributeValue>
</Attribute>
</Attributes>
</Request>
So again the question, can we have such XACML request (i.e. U asks from read and delete at the same time)?
Yes.. you can send two attribute values. But i guess, this would result Permit, as your policy has been written with string-at-least-one-member-of function. This function just verify whether there are at least one match. As read action is matched, Policy returns with Permit. I guess, you can use subset function to achieve this. Please see following policy.. This would work for your requirement.
<Policy xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" PolicyId="test-bis" RuleCombiningAlgId="urn:oasis:names:tc:xacml:3.0:rule-combining-algorithm:permit-overrides" Version="1.0">
<Target></Target>
<Rule Effect="Permit" RuleId="read-or-write">
<Target>
<AnyOf>
<AllOf>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">d</AttributeValue>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"></AttributeDesignator>
</Match>
</AllOf>
</AnyOf>
</Target>
<Condition>
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:and">
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-subset">
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"></AttributeDesignator>
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-bag">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">read</AttributeValue>
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">write</AttributeValue>
</Apply>
</Apply>
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:any-of">
<Function FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-equal"></Function>
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">u</AttributeValue>
<AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"></AttributeDesignator>
</Apply>
</Apply>
</Condition>
</Rule>
<Rule Effect="Deny" RuleId="deny"></Rule>
</Policy>