Remove unsupported hashing methods.

[jomunoz]

Support of Whirlpool and RIPEMD160 hashing methods was removed in
cryptography.hazmat.primitives.
pyca/cryptography@0d6aaf4

[wayne-luminal]

Thanks @jomunoz! I merged and released #174 to get credstash usable again. I'll look at pulling your changes in.

[jomunoz]

Thanks @wayne-luminal, I think this pr might be the proper solution. In the other solution, by locking to a particular version of the cryptography library, we will be missing bugs fixes that will be made for that library.

[wayne-luminal]

@jomunoz You're right. When I looked at both PRs, I see this one is failing but haven't had time to dig into what the issue is yet. I figured to get a workable credstash again I'd add temporarily add the <2.1 to cryptography.

[tomgoren]

I guess I duped this without noticing #178 :(

There are some additional bits in my PR that I think might be important.

[ramonamis]

hello! is there any chance this can get released? pinning down the crypto library is not a permanent solution as it breaks other ssl libraries.

[tomgoren]

@ramonamis see #178 (comment).