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我正在尝试构建一个策略，该策略将从请求中接收属性列表和属性，检查单个属性是否在列表中并基于此进行许可。我还是一个新手，所以我可能忽略了一些东西。

我想出的是一个稍加修改的XACML 类型的包包。

当单独使用 WSO2 TryIt 工具进行评估时，结果为 Permit。如果这是服务器上唯一启用的策略，也会发生同样的事情。如果我启用其他策略，它会以 Indeterminate/Couldn't find AttributeDesignator 属性响应。

当我提出符合其他政策的请求时，同样的情况也不会发生。其他策略返回预期结果，尽管没有一个包含列表。

为什么它会这样做，我该如何减轻它？

政策：

<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>

随之而来的请求：

<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>

不确定的反应：

<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>

启用后使服务器出现此问题的示例策略和请求：

<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>

请求：

<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>
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1 回答 1

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这确实很奇怪。如果我将第一个策略导入Axiomatics策略创作工具（免责声明：我为 Axiomatics 工作）并使用模拟功能，我会得到预期的结果。

仿真表明评估遵循如下路径：

在此处输入图像描述

我不确定您为什么会在您身边看到您所描述的行为。我不确定的一件事是您说“如果我启用其他策略”时的意思，您是否从第一个策略中引用了第二个策略？

于 2015-09-02T04:00:29.767 回答