this is not a buflen, it is an outlen. refs #696
be more pedantic in checking the written size of the digest (refs #696)
Merge pull request #697 from reaperhulk/hmac-fix

Fix HMAC finalize buflen issue
Merge pull request #698 from reaperhulk/hash-fix

Be more pedantic in checking the written size of the hash digest
add RSA verification support
Add PSS support to RSA sign/verify
some kwargs for pss tests
review comments from previous PR applied to this one
add a check for an error I can't reproduce outside the CI infra
even more terrible debugging
c'mon
...
flailin'
debugging on travis is great
why not
consume error off the stack since this function pushes errors