Location of configuration file parameter UsernamePassword Login Handler

[Marco Zanini]

Hi to all,
I'm developing an extension of shibboleth for the LoginHandler and I want
to use jaas authentication. For this reason, I'm looking at the code of
UsernamePassword LoginHandler but I cannot understand where the jaas
configuration file is read.In the Jaas documentation, linked by the
shibboleth wiki (
http://docs.oracle.com/javase/1.5.0/docs/guide/security/jaas/tutorials/LoginConfigFile.html)
I cannot find relevant information. It suggest to tell java the location of
the configuration file trought the command line or the java.security file
but I didn't nor of these two and UsernamePassword LoginHandler works great
anyway! The problem is that my Handler, which for authentication has the
same code, cannot find the configuration file. How can I do?

In handler.xml we can specify configuration file as a parameter but then I
cannot see where in the code this parameter is acquired,
UsernamePasswordLoginHandler takes as input "servletUrl".

Many thanks,
Marco
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