我正在尝试构建一个策略,该策略将从请求中接收一个属性列表和一个属性,检查单个属性是否在列表中,并根据该列表进行许可。我还是个新手,所以我可能忽略了什么。
我想出的是一个略微修改过的XACML type for bags版本。
当使用WSO2 TryIt工具本身进行评估时,结果为Permit。如果这是服务器上唯一启用的策略,也会发生同样的情况。如果我启用其他策略,它会响应不确定/找不到AttributeDesignator属性。
当我发出命中其他策略的请求时,不会发生同样的情况。其他策略返回预期的结果,尽管没有任何策略包含列表。
为什么它会这样做,我如何减轻它?
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>不确定的响应:
<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>一个示例策略和请求,在启用时,会使服务器出现此问题:
<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>发布于 2015-09-02 12:00:30
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:

我不确定为什么你会在你身边看到你所描述的行为。有一件事我不确定,那就是你说的“如果我启用其他策略”是什么意思,你是从第一个策略中引用第二个策略的吗?
https://stackoverflow.com/questions/32327327
复制相似问题