From another thread :

On Tue, 2012-11-27 at 22:47 +0100, Niels Möller wrote: ...

For lack of more authoritative test vectors, adding a couple of testvectors generated by python-pbkdf2, to the nettle testsuite would be nice.

Attached is a patch that tries to validate the Nettle PBKDF2-HMAC-SHA512 implementation with a few values generated with python-pbkdf2 from https://www.dlitz.net/software/python-pbkdf2/.

I also conducted 300,000 semi-random tests comparing the Nettle digest with corresponding OpenSSL digests, using QuickCheck-like testing, with good results. I did not use python-pbkdf2 checks for these, because frankly they were too slow.

In case anyone is interested, I'm attaching the QC test too. Quick instructions for that one would be to install 'qc' from git://github.com/dbravender/qc.git, my python-ndnkdf from https://github.com/fredrikt/python-ndnkdf and then do

$ nosetests -d qc-test.py

/Fredrik