WSO2身份服务器 - 将请求中的多个属性发送到WSO2IS中的自定义策略信息点(PIP)

时间:2017-03-08 13:10:34

标签: authorization wso2is xacml abac alfa

我正在使用WSO2IS 5.3.0,我已按照本网站上的说明进行操作:https://docs.wso2.com/display/IS530/Writing+a+Custom+Policy+Info+Point

我已经成功实现了自定义PIP属性查找器(KMarketJDBCAttributeFinder),到目前为止还不错。我遇到的问题是我想发送多个属性,但是AttributeFinder只选择一个。接下来,我的政策和要求:

XACML政策:

<Policy xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17"
        xmlns:xacml="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17"
        PolicyId="My-Custom-Policy"
        RuleCombiningAlgId="urn:oasis:names:tc:xacml:1.0:rule-combining-algorithm:first-applicable"
        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">subj-id</AttributeValue>
        <AttributeDesignator
                MustBePresent="false"
                Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject"
                AttributeId="urn:oasis:names:tc:xacml:1.0:subject:subject-id"
                DataType="http://www.w3.org/2001/XMLSchema#string"/>
      </Match>
    </AllOf>
  </AnyOf>
</Target>
<Rule RuleId="rule1" Effect="Permit">
  <Target>
    <AnyOf>
      <AllOf>
        <Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
          <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">action-value</AttributeValue>
          <AttributeDesignator
                  MustBePresent="false"
                  Category="urn:oasis:names:tc:xacml:3.0:attribute-category:action"
                  AttributeId="urn:oasis:names:tc:xacml:1.0:action:action-id"
                  DataType="http://www.w3.org/2001/XMLSchema#string"/>
        </Match>
      </AllOf>
    </AnyOf>
  </Target>
  <Condition>
    <Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:any-of">
      <Function FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-equal"/>
      <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">some-value-returned-by-custom-pip-finder-jar</AttributeValue>
      <AttributeDesignator
              Category="urn:oasis:names:tc:xacml:3.0:attribute-category:resource"
              AttributeId="urn:my:custom:id:data-one"
              DataType="http://www.w3.org/2001/XMLSchema#string"
              MustBePresent="false"/>
    </Apply>
  </Condition>
</Rule>
<Rule RuleId="rule2" Effect="Deny"/>
</Policy>

XACML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: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">subj-id</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">action-value</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">re-src-id</AttributeValue>
        </Attribute>
        <Attribute AttributeId="urn:my:custom:id:data-one" IncludeInResult="false">
            <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">data-one</AttributeValue>
        </Attribute>
        <Attribute AttributeId="urn:my:custom:id:data-two" IncludeInResult="false">
            <AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">data-two</AttributeValue>
        </Attribute>
    </Attributes>
</Request>

如您所见,我将三个属性作为资源类别的一部分发送;但是当我调试代码时,我只看到其中一个属性被拾取(其他属性被忽略)

此外,根据请求和政策,我使用了海关属性ID:urn:my:custom:id:data-oneurn:my:custom:id:data-two

¿如何发送多个属性(不使用“多个请求”选项,我只发送一个请求)并确认我的自定义attributeFinder PIP扩展正确获取了所有属性?

1 个答案:

答案 0 :(得分:0)

分析负责从请求中获取属性的Abstract类的代码,创建属性包的方法只选择一个;这就是我的测试不起作用的方式。

我找到的解决方案是创建自己的抽象类,实现类PIPAttributeFinder并从请求中获取所有属性:

... (other code)

    List<String> resourceList = new ArrayList<String>();

    EvaluationResult resource = evaluationCtx.getAttribute(new URI("http://www.w3.org/2001/XMLSchema#string"), new URI("urn:oasis:names:tc:xacml:1.0:resource:resource-id"), issuer, new URI("urn:oasis:names:tc:xacml:3.0:attribute-category:resource"));
    if (resource != null && resource.getAttributeValue() != null && resource.getAttributeValue().isBag()) {
        key = (BagAttribute) resource.getAttributeValue();
        if (key.size() > 0) {
            Iterator iterator = key.iterator();
            String encodeAttribute = "";
            while(iterator.hasNext()) {
                AttributeValue attributeValue = (AttributeValue)iterator.next();
                encodeAttribute = attributeValue.encode();
                resourceList.add(encodeAttribute);
            }
            if (log.isDebugEnabled()) {
                log.debug(String.format("Finding attributes for the resource %1$s", new Object[]{encodeAttribute}));
            }
            resourceId = "empty-value";
        }
    }

... (other code)

    attributeValues = this.getAttributeValues(subjectId, resourceId, resourceList, actionId, environmentId, attributeId.toString(), issuer);

... (other code)

请记住,您需要修改方法getAttributeValues

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