Configuring Resource Adapter Security (The Java EE 6 Tutorial)

The Java EE 6 Tutorial

Configuring Resource Adapter Security

A resource adapter is a system-level software component that typically implements network connectivity to an external resource manager. A resource adapter can extend the functionality of the Java EE platform either by implementing one of the Java EE standard service APIs, such as a JDBC driver, or by defining and implementing a resource adapter for a connector to an external application system. Resource adapters can also provide services that are entirely local, perhaps interacting with native resources. Resource adapters interface with the Java EE platform through the Java EE service provider interfaces (Java EE SPI). A resource adapter that uses the Java EE SPIs to attach to the Java EE platform will be able to work with all Java EE products.

To configure the security settings for a resource adapter, you need to edit the resource adapter descriptor file, ra.xml. Here is an example of the part of an ra.xml file that configures the following security properties for a resource adapter:

<authentication-mechanism>
    <authentication-mechanism-type>
        BasicPassword
    </authentication-mechanism-type>
    <credential-interface>
        javax.resource.spi.security.PasswordCredential
    </credential-interface>
</authentication-mechanism>
<reauthentication-support>false</reauthentication-support>

You can find out more about the options for configuring resource adapter security by reviewing as-install/lib/dtds/connector_1_0.dtd. You can configure the following elements in the resource adapter deployment descriptor file:

Authentication mechanisms: Use the authentication-mechanism element to specify an authentication mechanism supported by the resource adapter. This support is for the resource adapter, not for the underlying EIS instance.

There are two supported mechanism types:
- BasicPassword, which supports the following interface:
```
javax.resource.spi.security.PasswordCredential
```
- Kerbv5, which supports the following interface:
```
javax.resource.spi.security.GenericCredential
```
  The GlassFish Server does not currently support this mechanism type.
Reauthentication support: Use the reauthentication-support element to specify whether the resource adapter implementation supports reauthentication of existing Managed-Connection instances. Options are true or false.
Security permissions: Use the security-permission element to specify a security permission that is required by the resource adapter code. Support for security permissions is optional and is not supported in the current release of the GlassFish Server. You can, however, manually update the server.policy file to add the relevant permissions for the resource adapter.

The security permissions listed in the deployment descriptor are different from those required by the default permission set as specified in the connector specification.

For more information on the implementation of the security permission specification, visit http://download.oracle.com/javase/6/docs/technotes/guides/security/PolicyFiles.html#FileSyntax.

In addition to specifying resource adapter security in the ra.xml file, you can create a security map for a connector connection pool to map an application principal or a user group to a back-end EIS principal. The security map is usually used if one or more EIS back-end principals are used to execute operations (on the EIS) initiated by various principals or user groups in the application.