我正在尝试在WSO2中探索XACML。我在WSO2 IS 5.3.0中使用以下政策
<Policy xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" PolicyId="InStorePolicy" 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-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">access</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"></AttributeDesignator>
</Match>
</AllOf>
</AnyOf>
</Target>
<Rule Effect="Permit" RuleId="Rule_for_employee">
<Target>
<AnyOf>
<AllOf>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Employee</AttributeValue>
<AttributeDesignator AttributeId="http://test.org/claim/role" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"></AttributeDesignator>
</Match>
</AllOf>
<AllOf>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Manager</AttributeValue>
<AttributeDesignator AttributeId="http://wso2.org/claims/role" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"></AttributeDesignator>
</Match>
</AllOf>
</AnyOf>
</Target>
<Condition>
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-at-least-one-member-of">
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-bag">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">private/support</AttributeValue>
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">private/team</AttributeValue>
</Apply>
<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"></AttributeDesignator>
</Apply>
</Condition>
</Rule>
<Rule Effect="Permit" RuleId="Rule_for_manager">
<Target>
<AnyOf>
<AllOf>
<Match MatchId="urn:oasis:names:tc:xacml:1.0:function:string-equal">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">Manager</AttributeValue>
<AttributeDesignator AttributeId="http://wso2.org/claims/role" Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject" DataType="http://www.w3.org/2001/XMLSchema#string" MustBePresent="true"></AttributeDesignator>
</Match>
</AllOf>
</AnyOf>
</Target>
<Condition>
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-at-least-one-member-of">
<Apply FunctionId="urn:oasis:names:tc:xacml:1.0:function:string-bag">
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">private</AttributeValue>
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">private/business</AttributeValue>
<AttributeValue DataType="http://www.w3.org/2001/XMLSchema#string">private/leadership</AttributeValue>
</Apply>
<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"></AttributeDesignator>
</Apply>
</Condition>
</Rule>
<Rule Effect="Deny" RuleId="Rule_deny_all"></Rule>
</Policy>
我创建了具有Manager和Employee角色的用户。但是,当我使用&#39; Tryit&#39;时,如果使用以下值,我会得到&#34; Indeterminate&#34;
行动:访问, 主题:employee1, 资源:/ private / team
另外,我得到了&#34;无法找到AttributeDesignator属性&#34;服务器控制台中的错误。我无法找到更多细节。
有人可以帮我理解这个问题吗?
-Albie Morken
答案 0 :(得分:1)
我使用Axiomatics Policy Server尝试了您的策略,我相信我可能找到了您的问题的根本原因。您的部分属性标记为MustBePresent
。这是一个可选标志,如果设置为true,如果您的属性没有值,则会使评估返回Indeterminate。
以下是授予访问权限的三种不同方式:
stringAtLeastOneMemberOf(stringBag("private/support" , "private/team") , Attributes.resource.resource_id ) AND "access" == Attributes.action.action_id AND "Employee" == http://test.org/claim/role
"Manager" == http://wso2.org/claims/role AND stringAtLeastOneMemberOf(stringBag("private/support" , "private/team") , Attributes.resource.resource_id ) AND "access" == Attributes.action.action_id
"Manager" == http://wso2.org/claims/role AND "access" == Attributes.action.action_id AND stringAtLeastOneMemberOf(stringBag("private" , "private/business" , "private/leadership") , Attributes.resource.resource_id )
上面的表示法使用ALFA,即授权的缩写语言。
这是您的政策在政策编辑器中的样子。
您的政策BTW中有一些奇怪的事情:
MustBePresent
。我通常不这样做,但这可能是一种偏好。以下内容比前者更容易阅读。
以下示例利用XACML的JSON配置文件(Wikipedia | Blog post)
{
"Request": {
"AccessSubject": {
"Attribute": [
{
"AttributeId": "http://test.org/claim/role",
"Value": "Employee"
}
]
},
"Resource": {
"Attribute": [
{
"AttributeId": "urn:oasis:names:tc:xacml:1.0:resource:resource-id",
"Value": "private/support"
}
]
},
"Action": {
"Attribute": [
{
"AttributeId": "urn:oasis:names:tc:xacml:1.0:action:action-id",
"Value": "access"
}
]
},
"Environment": {
"Attribute": []
}
}
}
匹配响应
{
"Response" : {
"Decision" : "Permit",
"Status" : {
"StatusCode" : {
"Value" : "urn:oasis:names:tc:xacml:1.0:status:ok",
"StatusCode" : {
"Value" : "urn:oasis:names:tc:xacml:1.0:status:ok"
}
}
}
}
}