listappnames.html

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<TITLE>Listing the Login Modules of an Entry in the Current Login Configuration
(Java Developers Almanac Example)
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    <A HREF="../index.html">List of Packages</A>
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    <B><A HREF="../javax.security.auth.login/pkg.html">javax.security.auth.login</A></B><font color="#666666" SIZE="-2">
        &nbsp;[3 examples]
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  <h3>
    e507.  
    Listing the Login Modules of an Entry in the Current Login Configuration</h3>

This example retrieves the login modules of a login-application entry
in the current login configuration.


<pre>
    Configuration config = Configuration.getConfiguration();
    
    // Get the login modules
    AppConfigurationEntry[] loginModuleEntries = config.getAppConfigurationEntry(<font color="#0066ff"><i>"AppName"</i></font>);
    if (loginModuleEntries == null) {
        // There are no entries for the specified login-app name
    }
    
    // List the login modules
    for (int i=0; i&lt;loginModuleEntries.length; i++) {
        // Get login module name
        String name = loginModuleEntries[i].getLoginModuleName();
    
        // Get login module flag
        AppConfigurationEntry.LoginModuleControlFlag flag
            = loginModuleEntries[i].getControlFlag();
    
        if (flag == AppConfigurationEntry.LoginModuleControlFlag.OPTIONAL) {
            // The login module is not required to succeed.
            // Whether it succeeds or not, the next login module is invoked.
        } else if (flag == AppConfigurationEntry.LoginModuleControlFlag.REQUIRED) {
            // The login module is required to succeed.
            // Whether it succeeds or not, the next login module is invoked.
        } else if (flag == AppConfigurationEntry.LoginModuleControlFlag.REQUISITE) {
            // The login module is required to succeed. If it succeeds, the next
            // login module is invoked; otherwise, authentication fails and
            // no more login modules are invoked.
        } else if (flag == AppConfigurationEntry.LoginModuleControlFlag.SUFFICIENT) {
            // If this login module succeeds, authentication succeeds and no
            // more login modules are invoked
        }
    }
</pre>
Here's a sample of a login configuration file:

<pre>
    AppName {
        com.sun.security.auth.module.NTLoginModule required;
        MyLoginModule1 requisite;
        MyLoginModule2 sufficient;
        MyLoginModule3 optional;
    };
</pre>
The login configuration file is specified at the command line:

<pre>
    &gt; java -Djava.security.auth.login.config=<font color="#0066ff"><i>myconfig.config</i></font> <font color="#0066ff"><i>MyApp</i></font>

</pre>
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            &nbsp;Related Examples
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e508. <a class="eglink" href="GetLogin.html?l=rel">
    Getting the Login Name of the Currently Logged-In User
</a>
<br>

e509. <a class="eglink" href="HandleCb.html?l=rel">
    Handling the Callbacks from a Login Module
</a>
<br>


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