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Writing XACML 3 Policies in WSO2 Identity Server - 5

Owned by Former user (Deleted)
Dec 04, 2014
1 min read

This page addresses the following authorization requirements.

  1. The operation getEmployees in the service "http://localhost:8280/services/Customers" should only be accessed by users belonging to the group(s) admin_emps and/or admin.
  2. Requests to any other service or operation should fail.
<Policy xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" PolicyId="5" RuleCombiningAlgId="urn:oasis:names:tc:xacml:1.0:rule-combining-algorithm:first-applicable" Version="1.0">
	<Description>Test Or</Description>
	<Target></Target>
	<Rule Effect="Permit" RuleId="primary-group-emps-rule">
		<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">http://localhost:8280/services/Customers</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>
					<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
						<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">read</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"></AttributeDesignator>
					</Match>
				</AllOf>
			</AnyOf>
		</Target>
		<Condition>
			<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-at-least-one-member-of">
				<AttributeDesignator AttributeId="group" Category="urn:oasis:names:tc:xacml:3.0:group" 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">admin_emps</AttributeValue>
					<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">admin</AttributeValue>
				</Apply>
			</Apply>
		</Condition>
	</Rule>
	<Rule Effect="Deny" RuleId="deny-rule"/>
</Policy>

 

Response: Permit

<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">admin</AttributeValue>
		</Attribute>
	</Attributes>
	<Attributes Category="urn:oasis:names:tc:xacml:3.0:example-group">
		<Attribute AttributeId="group" IncludeInResult="false">
			<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">admin_emps</AttributeValue>
			<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">admin</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">http://localhost:8280/services/Customers</AttributeValue>
		</Attribute>
	</Attributes>
</Request>


Response: Permit

<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">admin</AttributeValue>
		</Attribute>
	</Attributes>
	<Attributes Category="urn:oasis:names:tc:xacml:3.0:group">
		<Attribute AttributeId="group" IncludeInResult="false">
			<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">admin_emps</AttributeValue>
			<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">admin</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">http://localhost:8280/services/Customers</AttributeValue>
		</Attribute>
	</Attributes>
</Request>