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AuthzForce XACML响应不确定

[英]AuthzForce XACML Response is Indeterminate

 原文  2018-01-25 12:22:33  2   2    java/ security/ authorization/ xacml/ authzforce

问题描述

I am exploring Authzforce XACML3.0 and I have been running into issues. 我正在探索Authzforce XACML3.0，并且遇到了问题。 I keep getting my responses as indeterminate. 我的回答一直不确定。 Below is my setup and the Exception trace which it throws. 以下是我的设置及其引发的异常跟踪。 Any help is appreciated. 任何帮助表示赞赏。

Request File: 请求文件： 

<?xml version="1.0" encoding="utf-8"?>
<Request  ReturnPolicyIdList="false" CombinedDecision="false" xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">
    <Attribute IncludeInResult="false" AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id">
      <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Julius Hibbert</AttributeValue>
    </Attribute>
    <Attribute IncludeInResult="false" AttributeId="urn:oasis:names:tc:xacml:2.0:conformance-test:age">
      <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#integer">45</AttributeValue>
    </Attribute>
    <Attribute IncludeInResult="false" AttributeId="urn:oasis:names:tc:xacml:2.0:conformance-test:age">
      <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#integer">46</AttributeValue>
    </Attribute>
  </Attributes>
  <Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource">
    <Attribute IncludeInResult="false" AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id">
      <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#anyURI">http://medico.com/record/patient/BartSimpson</AttributeValue>
    </Attribute>
  </Attributes>
  <Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action">
    <Attribute IncludeInResult="false" AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id">
      <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">read</AttributeValue>
    </Attribute>
  </Attributes>
  <Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:environment" />
</Request>

Policy File: 政策档案： 

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<Policy xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" PolicyId="urn:oasis:names:tc:xacml:2.0:conformance-test:IIA1:policy"
    RuleCombiningAlgId="urn:oasis:names:tc:xacml:3.0:rule-combining-algorithm:deny-overrides"
    Version="1.0">
    <Description>
        Policy for Conformance Test IIA011.
    </Description>
    <Target />
    <Rule Effect="Permit"
        RuleId="urn:oasis:names:tc:xacml:2.0:conformance-test:IIA1:rule">
        <Description>
            Anyone who is 45 integer years old may perform any
            action on any resource.
        </Description>
        <Condition>
            <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:integer-equal">
                <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:integer-one-and-only">
                    <AttributeDesignator
                        AttributeId="urn:oasis:names:tc:xacml:2.0:conformance-test:age"
                        Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject"
                        DataType="http://www.w3.org/2001/XMLSchema#integer" MustBePresent="false" />
                </Apply>
                <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#integer">45</AttributeValue>
            </Apply>
        </Condition>
    </Rule>
</Policy>

PDP Config File: PDP配置文件： 

<?xml version="1.0" encoding="UTF-8"?>
<pdp xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://authzforce.github.io/core/xmlns/pdp/6.0" version="6.0.0">
    <rootPolicyProvider id="rootPolicyProvider" xsi:type="StaticRootPolicyProvider" policyLocation="policy.xml" />
</pdp>

Exception Trace: 异常跟踪： 

org.ow2.authzforce.core.pdp.api.IndeterminateEvaluationException: Function urn:oasis:names:tc:xacml:1.0:function:integer-equal: indeterminate arg
    at org.ow2.authzforce.core.pdp.api.func.BaseFirstOrderFunctionCall$EagerSinglePrimitiveTypeEval.evaluate(BaseFirstOrderFunctionCall.java:662)
    at org.ow2.authzforce.core.pdp.api.func.BaseFirstOrderFunctionCall.evaluate(BaseFirstOrderFunctionCall.java:359)
    at org.ow2.authzforce.core.pdp.impl.expression.ApplyExpressions$VariableApplyExpression.evaluate(ApplyExpressions.java:87)
    at org.ow2.authzforce.core.pdp.impl.rule.ConditionEvaluators$BooleanExpressionEvaluator.evaluate(ConditionEvaluators.java:94)
    at org.ow2.authzforce.core.pdp.impl.rule.RuleEvaluator.evaluate(RuleEvaluator.java:535)
    at org.ow2.authzforce.core.pdp.impl.combining.CombiningAlgEvaluators$RulesWithSameEffectEvaluator.evaluate(CombiningAlgEvaluators.java:134)
    at org.ow2.authzforce.core.pdp.impl.policy.PolicyEvaluators$BaseTopLevelPolicyElementEvaluator.evaluate(PolicyEvaluators.java:764)
    at org.ow2.authzforce.core.pdp.impl.policy.PolicyEvaluators$BaseTopLevelPolicyElementEvaluator.evaluate(PolicyEvaluators.java:881)
    at org.ow2.authzforce.core.pdp.impl.policy.RootPolicyEvaluators$StaticView.findAndEvaluate(RootPolicyEvaluators.java:190)
    at org.ow2.authzforce.core.pdp.impl.BasePdpEngine$IndividualDecisionRequestEvaluator.evaluateInNewContext(BasePdpEngine.java:685)
    at org.ow2.authzforce.core.pdp.impl.BasePdpEngine$NonCachingIndividualDecisionRequestEvaluator.evaluate(BasePdpEngine.java:730)
    at org.ow2.authzforce.core.pdp.impl.BasePdpEngine.evaluate(BasePdpEngine.java:984)
    at org.ow2.authzforce.core.pdp.api.io.BasePdpEngineAdapter.evaluate(BasePdpEngineAdapter.java:128)
    at org.ow2.authzforce.core.pdp.api.io.BasePdpEngineAdapter.evaluate(BasePdpEngineAdapter.java:149)
    at XACMLTester.main(XACMLTester.java:29)
Caused by: org.ow2.authzforce.core.pdp.api.IndeterminateEvaluationException: Indeterminate arg #0
    at org.ow2.authzforce.core.pdp.api.func.BaseFirstOrderFunctionCall.evalPrimitiveArgs(BaseFirstOrderFunctionCall.java:94)
    at org.ow2.authzforce.core.pdp.api.func.BaseFirstOrderFunctionCall.access$200(BaseFirstOrderFunctionCall.java:53)
    at org.ow2.authzforce.core.pdp.api.func.BaseFirstOrderFunctionCall$EagerSinglePrimitiveTypeEval.evaluate(BaseFirstOrderFunctionCall.java:658)
    ... 14 more
Caused by: org.ow2.authzforce.core.pdp.api.IndeterminateEvaluationException: Function urn:oasis:names:tc:xacml:1.0:function:integer-one-and-only: Invalid arg #0: empty bag or bag size > 1. Required: one and only one value in bag.
    at org.ow2.authzforce.core.pdp.api.func.FirstOrderBagFunctions$SingletonBagToPrimitive.<init>(FirstOrderBagFunctions.java:82)
    at org.ow2.authzforce.core.pdp.api.func.FirstOrderBagFunctions.getFunctions(FirstOrderBagFunctions.java:554)
    at org.ow2.authzforce.core.pdp.impl.func.StandardFunction.getRegistry(StandardFunction.java:901)
    at org.ow2.authzforce.core.pdp.impl.PdpEngineConfiguration.<init>(PdpEngineConfiguration.java:286)
    at org.ow2.authzforce.core.pdp.impl.PdpEngineConfiguration.getInstance(PdpEngineConfiguration.java:479)
    at org.ow2.authzforce.core.pdp.impl.PdpEngineConfiguration.getInstance(PdpEngineConfiguration.java:519)
    at org.ow2.authzforce.core.pdp.impl.PdpEngineConfiguration.getInstance(PdpEngineConfiguration.java:551)
    at org.ow2.authzforce.core.pdp.impl.PdpEngineConfiguration.getInstance(PdpEngineConfiguration.java:687)
    at org.ow2.authzforce.core.pdp.impl.PdpEngineConfiguration.getInstance(PdpEngineConfiguration.java:704)
    at XACMLTester.main(XACMLTester.java:23)

The Exception says that the Bag is either empty or more than 1 but i do not see that as the problem as I am providing the data as needed. 例外情况表示袋子是空的或大于1，但我认为这是问题，因为我正在根据需要提供数据。 Any help is appreciated 任何帮助表示赞赏

2 个解决方案

解决方案1
 0 已采纳  2018-01-25 16:56:56

This is quite simple. 这很简单。 You are sending 2 ages. 您要传送2个年龄。 You need to send one age only. 您只需要发送一个年龄。 Try the following: 请尝试以下操作： 

<xacml-ctx:Request ReturnPolicyIdList="false" CombinedDecision="false" xmlns:xacml-ctx="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17">
   <xacml-ctx:Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource" >
      <xacml-ctx:Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:resource:resource-id" IncludeInResult="false">
         <xacml-ctx:AttributeValue DataType="http://www.w3.org/2001/XMLSchema#anyURI">http://medico.com/record/patient/BartSimpson</xacml-ctx:AttributeValue>
      </xacml-ctx:Attribute>
   </xacml-ctx:Attributes>
   <xacml-ctx:Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:environment" >
   </xacml-ctx:Attributes>
   <xacml-ctx:Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" >
      <xacml-ctx:Attribute AttributeId="urn:oasis:names:tc:xacml:2.0:conformance-test:age" IncludeInResult="false">
         <xacml-ctx:AttributeValue DataType="http://www.w3.org/2001/XMLSchema#integer">45</xacml-ctx:AttributeValue>
      </xacml-ctx:Attribute>
      <xacml-ctx:Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id" IncludeInResult="false">
         <xacml-ctx:AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Julius Hibbert</xacml-ctx:AttributeValue>
      </xacml-ctx:Attribute>
   </xacml-ctx:Attributes>
   <xacml-ctx:Attributes Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action" >
      <xacml-ctx:Attribute AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id" IncludeInResult="false">
         <xacml-ctx:AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">read</xacml-ctx:AttributeValue>
      </xacml-ctx:Attribute>
   </xacml-ctx:Attributes>
</xacml-ctx:Request>

解决方案2
 0  2018-01-28 23:36:55

David is right. 大卫是对的。 For your own understanding on how the policy evaluation works, the root cause message in the exception stacktrace says that arg #0 , ie the first (and only) argument passed to the function integer-one-and-only , which is a bag, does NOT have one and only value as it should, ie it is either empty or has more than one . 为了让您自己了解策略评估的工作原理，异常stacktrace中的根本原因消息指出arg＃0 ，即，第一个（也是唯一一个）传递给函数integer-one-and-only的参数 ，这是一个袋子，没有唯一应有的值，即它为空或具有多个 。

Indeed, in your Policy, you define this argument as an AttributeDesignator, ie the bag of values of attribute ...:conformance-test:age ; 实际上，在您的策略中，您将此参数定义为AttributeDesignator，即属性...：conformance-test：age的值袋； and in your Request, you are giving 2 different values to this attribute. 并且在您的请求中，您为此属性指定了2个不同的值。 So the AttributeDesignator evaluates to a bag of 2 values, which is not valid for the function integer-one-and-only . 因此，AttributeDesignator的结果为2个值的袋，这对于函数integer-one-and-only无效。 It is too much. 实在是太多了。

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