Hi guys,

we use KeyInSessionSunJceCryptFactory to protected our app from CSRF, where
every user have it's own encryption key per session for URL crypting. 

Anyway,* I want to be able to detect when user uses URL from previous
session and to display some warning* or something like that.

The only thing I can think of is to catch "IllegalBlockSizeException" in
org.apache.wicket.util.crypt.AbstractCrypt.decryptUrlSafe method and rethrow
it as my ApplicationException and catch it in some RequestCycle listener...

Is there a better way?

Thanks in advance for your help

regards

Tomas

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