Is it possible to use container-managed authentication with password salting?
I know how to set up vanilla container-managed security that uses form authentication and uses digested passwords (say, SHA-256). Something like this:
web.xml
<login-config>
<auth-method>FORM</auth-method>
<realm-name>jdbc</realm-name>
<form-login-config>
<form-login-page>/login.jsf</form-login-page>
<form-error-page>/login-error.jsf</form-error-page>
</form-login-config>
</login-config>
login.xhtml
<form action="j_security_check">
<p><label>
Username:<br/>
<input type="text" name="j_username" />
</label></p>
<p><label>
Password:<br/>
<input type="password" name="j_password" />
</label></p>
<p>
<button type="submit">Submit</button>
</p>
</form>
Pretty darn simple - but what I'd really like to be able to do is salt the password with a global salt an开发者_开发技巧d the username. Yes, I am aware that this isn't ideal but right now, I'm just building a proof-of-concept.
Can the container (GlassFish 3, in this case) do this for me, or do I have to write my own login filter? I've done it before (for J2EE applications) but my gut tells me that there's got to be a tighter way to do it now that I'm using Java EE 6.
I get the feeling you're looking for a quick (& potentially dirty?) way to modify the build-in authentication provider.
The proper way to go is to implement your own Java Authentication Service Provider for the new JASPIC API (JSR-196). It is more laborious, but this method lets you roll your implementation any way you like it, and it should be compatible with any Java EE 6 application server.
For a basic authentication scheme with password salting, implementing such a provider should be pretty straightforward. You will have to think about managing users and passwords, but one solution could be to let your provider re-use the users defined in the Glassfish authentication realms, so that you only have to manage the custom salted passwords yourself.
There's a nice tutorial for WebSphere, which you should be able to adapt for Glassfish here.
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