> I have the CAS (3.5) inspektr audits logging to a file. I have been given a
> requirement to show the WHY a credential is considered bad; i.e. either a
> bad username or a bad password.

That is impossible for some authentication handlers.  For example an
LDAP bind simply produces error code 49, from which you cannot
distinguish between unknown username, invalid password, or both.  I
suppose you could determine a non-existent user if you perform and
LDAP search and it returns 0 results, but there are other cases for
which it's simply not possible to distinguish.  LDAP is the
authentication backend with which I'm most familiar, but I'm fairly
certain it's true generally.

M

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