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16.4. EJB Application Security

16.4.1. Security Identity
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16.4.1.1. About EJB Security Identity
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An EJB can specify an identity to use when invoking methods on other components. This is the EJB's security identity (also known as invocation identity).
By default, the EJB uses its own caller identity. The identity can alternatively be set to a specific security role. Using specific security roles is useful when you want to construct a segmented security model - for example, restricting access to a set of components to internal EJBs only.
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16.4.1.2. Set the Security Identity of an EJB
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The security identity of the EJB is specified through the <security-identity> tag in the security configuration.
By default - if no <security-identity> tag is present - the EJB's own caller identity is used.

Example 16.5. Set the security identity of an EJB to be the same as its caller

This example sets the security identity for method invocations made by an EJB to be the same as the current caller's identity. This behavior is the default if you do not specify a <security-identity> element declaration. 
<ejb-jar>
  <enterprise-beans>
	 <session>
		<ejb-name>ASessionBean</ejb-name>
		<!-- ... -->
		<security-identity>
		  <use-caller-identity/>
		</security-identity>
	 </session>
	 <!-- ... -->
  </enterprise-beans>
</ejb-jar>
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Example 16.6. Set the security identity of an EJB to a specific role

To set the security identity to a specific role, use the <run-as> and <role-name> tags inside the <security-identity> tag. 
<ejb-jar>
  <enterprise-beans>
	 <session>
		<ejb-name>RunAsBean</ejb-name>
		<!-- ... -->
		<security-identity>
		  <run-as>
			 <description>A private internal role</description>
			 <role-name>InternalRole</role-name>
		  </run-as>
		</security-identity>
	 </session>
  </enterprise-beans>
  <!-- ... -->
</ejb-jar>
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By default, when you use <run-as>, a principal named anonymous is assigned to outgoing calls. To assign a different principal, uses the <run-as-principal>. 
<session>
    <ejb-name>RunAsBean</ejb-name>
    <security-identity>
        <run-as-principal>internal</run-as-principal>
    </security-identity>
</session>
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Note

You can also use the <run-as> and <run-as-principal> elements inside a servlet element.

See also:

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