Split OpenSSL backend into separate files (cipher contexts)

refs #1171
It's also `primitives.ciphers`, so I think `ciphers` probably makes sense?


On Tue, Jun 24, 2014 at 9:07 PM, Paul Kehrer <notifications@github.com>
wrote:

> In cryptography/hazmat/backends/openssl/backend.py:
>
> >  )
> >  from cryptography.hazmat.backends.interfaces import (
> >      CMACBackend, CipherBackend, DSABackend, EllipticCurveBackend, HMACBackend,
> >      HashBackend, PBKDF2HMACBackend, PKCS8SerializationBackend, RSABackend,
> >      TraditionalOpenSSLSerializationBackend
> >  )
> > +from cryptography.hazmat.backends.openssl.cipher import (
>
> I have no preference other than to say I named the hash one "hashes".
> Maybe that means this should be ciphers?
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/pyca/cryptography/pull/1177/files#r14168371>.
>



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