Password quality?

[Kristian Köhntopp <kris () koehntopp de>]

I know how to check Unix and Windows passwords for quality - John the Ripper 
is quite an encompassing tool (http://www.openwall.com/john/).

I now need to check ssh2 and openssh private keys for policy compliance - do 
they have a password, and is it nontrivial?

Which tool am I going to use?

Kristian

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