I was unable to get cowpatty working with a packet capture that actually
contains a four-way handshake of a WPA session.
I got it working like this:
First, download cowpatty 4.6 right here, within the source directory of cowpatty.
Extract cowpatty and apply this patch using these instructions
Then build couwpatty just with 'make' and 'make install'.
I created a test setup with a known password. However, this patched
version did not find the passphrase using a dictionary file.
I then used genpmk to create a precomputed hash database like this:
genpmk -f ./aircrack-ng-1.0/test/password.lst -d hashes -s default
Please note that I added the correct passphrase to this password list to
make sure that cowpatty works.
Finally, using the -d option on the hash file, cowpatty
managed to crack the PSK.
ng.org/index.php?PHPSESSID=9e79f0ff83630bbe6c870b1a9aeef63c&topic=5867.0
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