crypto pbkdf2 keylen: bits or bytes?

[santo74]

The api docs use 512 for the keylen:

crypto.pbkdf2('secret', 'salt', 4096, 512, 'sha256', function(err, key) {
  if (err)
    throw err;
  console.log(key.toString('hex'));  // 'c5e478d...1469e50'
});

But they don't mention whether the keylen is in bits or bytes.
Given the fact that it has a value of 512 I would expect it to be in bits, but the end result seems to generate a key of 512 bytes

Some clarification would be welcome

[kenany]

This would be fixed by #3334 I think.

[santo74]

Definitely. Apparently I missed that one during my search.

[brendanashworth]

I think this can be closed then, as it was landed in ff8fa51.