AuthZForce PDP 未按预期运行

Question

我已扩展策略集以包含新策略，这意味着我已将目标添加到策略以确保请求以正确的策略为目标。

这里是策略集 xacml:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<PolicySet xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17"  PolicySetId="P1" Version="1.3" PolicyCombiningAlgId="urn:oasis:names:tc:xacml:3.0:policy-combining-algorithm:deny-overrides">
<Description>CD Governance PolicySet</Description>
<Target/>
<Policy PolicyId="urn:oasis:names:tc:xacml:1.0:date-in:july:policy" RuleCombiningAlgId="urn:oasis:names:tc:xacml:3.0:rule-combining-algorithm:deny-overrides" Version="01">
    <Description>Reject if the Date is July Policy</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">freezeCheck</AttributeValue>
                    <AttributeDesignator
                        AttributeId="urn:oasis:names:tc:xacml:1.0:date-in:july:target-check"
                        DataType="http://www.w3.org/2001/XMLSchema#string"
                        Category="urn:oasis:names:tc:xacml:1.0:subject-category:resource"
                        MustBePresent="false"
                        />
                </Match>
            </AllOf>
        </AnyOf>
    </Target>
    <Rule RuleId="urn:oasis:names:tc:xacml:1.0:date-not-in:july:rule" Effect="Permit">
     <Condition>
        <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:and">
            <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:not" >
                <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:date-is-in">
                    <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:date-one-and-only">
                        <AttributeDesignator 
                            AttributeId="urn:oasis:names:tc:xacml:1.0:date-in:july:current-date" 
                            DataType="http://www.w3.org/2001/XMLSchema#date" 
                            MustBePresent="true"
                            Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" />
                    </Apply>
                    <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:date-bag">
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2017-07-01</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-02</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-03</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-04</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-05</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-06</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-07</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-08</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-09</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-10</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-11</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-12</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-13</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-14</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-15</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-16</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-17</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-18</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-19</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-20</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-21</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-22</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-23</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-24</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-25</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-26</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-27</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-28</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-29</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-30</AttributeValue>
                        <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-31</AttributeValue>
                    </Apply>
                </Apply>
            </Apply>
        </Apply>
       </Condition>
    </Rule>
    <Rule RuleId="urn:oasis:names:tc:xacml:1.0:date-in:july:rule" Effect="Deny">
     <Condition>    
        <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:date-is-in">
           <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:date-one-and-only">
              <AttributeDesignator AttributeId="urn:oasis:names:tc:xacml:1.0:date-in:july:current-date" DataType="http://www.w3.org/2001/XMLSchema#date" MustBePresent="true"
                 Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" />
           </Apply>
           <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:date-bag">
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2017-07-01</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-02</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-03</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-04</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-05</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-06</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-07</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-08</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-09</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-10</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-11</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-12</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-13</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-14</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-15</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-16</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-17</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-18</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-19</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-20</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-21</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-22</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-23</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-24</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-25</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-26</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-27</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-28</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-29</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-30</AttributeValue>
              <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2002-07-31</AttributeValue>
           </Apply>
        </Apply>
     </Condition>
  </Rule>
</Policy>
<Policy PolicyId="urn:oasis:names:tc:xacml:1.0:app-in:prod:policy" RuleCombiningAlgId="urn:oasis:names:tc:xacml:3.0:rule-combining-algorithm:deny-overrides" Version="01">
    <Description>Reject if the Application is not allowed in Production Policy</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">prod</AttributeValue>
                    <AttributeDesignator
                        AttributeId="urn:oasis:names:tc:xacml:1.0:environment"
                        DataType="http://www.w3.org/2001/XMLSchema#string"
                        Category="urn:oasis:names:tc:xacml:1.0:subject-category:resource"
                        MustBePresent="true"
                        />
                </Match>
            </AllOf>
        </AnyOf>
    </Target>
    <Rule RuleId="urn:oasis:names:tc:xacml:1.0:app-not-in:prod:rule" Effect="Deny">
        <Condition>
            <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:and">
                <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:not" >
                    <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-is-in">
                        <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-one-and-only">
                            <AttributeDesignator 
                                AttributeId="urn:oasis:names:tc:xacml:1.0:production:apps" 
                                DataType="http://www.w3.org/2001/XMLSchema#string" 
                                MustBePresent="true"
                                Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" />
                        </Apply>
                        <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-bag">
                            <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">CRM</AttributeValue>
                            <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">SAP</AttributeValue>
                            <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Customer Portal</AttributeValue>
                        </Apply>
                    </Apply>
                </Apply>
            </Apply>
        </Condition>
    </Rule>
    <Rule RuleId="urn:oasis:names:tc:xacml:1.0:app-in:prod:rule" Effect="Permit">
        <Condition>    
            <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-is-in">
                <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-one-and-only">
                    <AttributeDesignator 
                        AttributeId="urn:oasis:names:tc:xacml:1.0:production:apps" 
                        DataType="http://www.w3.org/2001/XMLSchema#string" 
                        MustBePresent="true"
                        Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" />
                </Apply>
                <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-bag">
                    <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">CRM</AttributeValue>
                    <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">SAP</AttributeValue>
                    <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Customer Portal</AttributeValue>
                </Apply>
            </Apply>
        </Condition>
    </Rule>
</Policy>
</PolicySet>

因此，当我想检查第二个策略（Prod 中是否允许应用程序）时，我发送如下请求：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Request xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17"
 CombinedDecision="false" ReturnPolicyIdList="true">
    <Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:resource">
        <Attribute IncludeInResult="false"
                 AttributeId="urn:oasis:names:tc:xacml:1.0:environment">
            <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">prod</AttributeValue>
        </Attribute>
    </Attributes>
    <Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">
        <Attribute IncludeInResult="false"
                 AttributeId="urn:oasis:names:tc:xacml:1.0:production:apps">
            <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">SAP1</AttributeValue>
        </Attribute>
    </Attributes>
</Request>

哪个 returns 我期望的是：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Response xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" xmlns:ns2="http://authzforce.github.io/rest-api-model/xmlns/authz/5" xmlns:ns3="http://www.w3.org/2005/Atom" xmlns:ns4="http://authzforce.github.io/pap-dao-flat-file/xmlns/properties/3.6" xmlns:ns5="http://authzforce.github.io/core/xmlns/pdp/5.0">
    <Result>
        <Decision>Deny</Decision>
        <PolicyIdentifierList>
            <PolicyIdReference Version="01">urn:oasis:names:tc:xacml:1.0:app-in:prod:policy</PolicyIdReference>
            <PolicySetIdReference Version="1.3">P1</PolicySetIdReference>
        </PolicyIdentifierList>
    </Result>
</Response>

到目前为止一切顺利.... 但是当我发送这个时：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Request xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17"
 CombinedDecision="false" ReturnPolicyIdList="true">
    <Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:resource">
        <Attribute IncludeInResult="false"
                 AttributeId="urn:oasis:names:tc:xacml:1.0:date-in:july:target-check">
            <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">freezeCheck</AttributeValue>
        </Attribute>
    </Attributes>
    <Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">
        <Attribute IncludeInResult="false"
                 AttributeId="urn:oasis:names:tc:xacml:1.0:date-in:july:current-date">
            <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2017-08-01</AttributeValue>
        </Attribute>
    </Attributes>
</Request>

我没有得到与第一个类似的回应（但得到了许可），我得到了这个：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Response xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" xmlns:ns2="http://authzforce.github.io/rest-api-model/xmlns/authz/5" xmlns:ns3="http://www.w3.org/2005/Atom" xmlns:ns4="http://authzforce.github.io/pap-dao-flat-file/xmlns/properties/3.6" xmlns:ns5="http://authzforce.github.io/core/xmlns/pdp/5.0">
    <Result>
        <Decision>Indeterminate</Decision>
        <Status>
            <StatusCode Value="urn:oasis:names:tc:xacml:1.0:status:missing-attribute"/>
            <StatusMessage>Error evaluating &lt;Target&gt;/&lt;AnyOf&gt;#0</StatusMessage>
        </Status>
        <PolicyIdentifierList>
            <PolicyIdReference Version="01">urn:oasis:names:tc:xacml:1.0:date-in:july:policy</PolicyIdReference>
            <PolicyIdReference Version="01">urn:oasis:names:tc:xacml:1.0:app-in:prod:policy</PolicyIdReference>
            <PolicySetIdReference Version="1.3">P1</PolicySetIdReference>
        </PolicyIdentifierList>
    </Result>
</Response>

现在您可能认为政策定义不正确，所以我发送了这个：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Request xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17"
 CombinedDecision="false" ReturnPolicyIdList="true">
    <Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:resource">
        <Attribute IncludeInResult="false"
                 AttributeId="urn:oasis:names:tc:xacml:1.0:date-in:july:target-check">
            <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">freezeCheck</AttributeValue>
        </Attribute>
    </Attributes>
    <Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">
        <Attribute IncludeInResult="false"
                 AttributeId="urn:oasis:names:tc:xacml:1.0:date-in:july:current-date">
            <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#date">2017-07-01</AttributeValue>
        </Attribute>
    </Attributes>
</Request>

我得到了预期的结果 - 拒绝，没有目标丢失错误：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Response xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" xmlns:ns2="http://authzforce.github.io/rest-api-model/xmlns/authz/5" xmlns:ns3="http://www.w3.org/2005/Atom" xmlns:ns4="http://authzforce.github.io/pap-dao-flat-file/xmlns/properties/3.6" xmlns:ns5="http://authzforce.github.io/core/xmlns/pdp/5.0">
    <Result>
        <Decision>Deny</Decision>
        <PolicyIdentifierList>
            <PolicyIdReference Version="01">urn:oasis:names:tc:xacml:1.0:date-in:july:policy</PolicyIdReference>
            <PolicySetIdReference Version="1.3">P1</PolicySetIdReference>
        </PolicyIdentifierList>
    </Result>
</Response>

所以为什么 PDP 对这个政策感到困惑（在我看来，它与另一个正常工作的一样......是的，当应用程序在政策列表中时，我得到了许可）？

为什么它认为目标的属性完全缺失（而不是只有错误的值）？为什么要对条件属性执行此操作？

Answer 1

正如 StatusCode/StatusMessage/PolicyIdentifierList 所说，由于缺少评估策略目标（第一个 AnyOf）所需的属性 urn:oasis:names:tc:xacml:1.0:app-in:prod:policy，您会得到一个不确定的决定。由于 MustBePresent=true 在这个 Target/AnyOf 中的 AttributeDesignator 上，如果在请求上下文中没有匹配的属性（并且我假设没有启用属性提供者），它被认为是一个错误。实际上，您的第二个请求中 Category="urn:oasis:names:tc:xacml:1.0:subject-category:resource" 中没有属性 AttributeId="urn:oasis:names:tc:xacml:1.0:environment"。因此，要么在请求中提供此类属性，要么设置 MustBePresent=false（或更改 AttributeDesignator），具体取决于您的需要。

顺便说一句，请尽可能使用 standard identifiers，以免我们在查看您的政策时感到困惑；例如标准资源类别标识符是 urn:oasis:names:tc:xacml:3.0:attribute-category:resource（不是 urn:oasis:names:tc:xacml:1.0:subject-category:resource）。

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