Rats modules using outdated crypto library

[botherder]

There are several modules in the rats/ folder by @kevthehermit that are using a crypto library called pycrypto, mostly for AES and DES support. Unfortunately, this library hasn't been updated since 2014 and also has a vulnerable ElGamal implementation:
https://nvd.nist.gov/vuln/detail/CVE-2018-6594

We should update these modules to make use of cryptography instead and drop pycrypto all together from our dependencies.

[ghost]

It seems that cryptography doesn't support DES, which is being used by the following Rats modules:

• nanocore
• albertino
• adwind

https://cryptography.io/en/latest/hazmat/primitives/symmetric-encryption/

Other than the lack of DES support, I can work on refactoring out as much of the pycrypto use. Might need another library (maybe M2Crypto?) for handling the DES stuff.

adwind.py:from Crypto.Cipher import ARC4, DES
albertino.py:from Crypto.Cipher import DES
arcom.py:from Crypto.Cipher import Blowfish
bluebanana.py:from Crypto.Cipher import AES
hawkeye.py-deprecated:from Crypto.Cipher import AES
jrat.py:from Crypto.Cipher import AES, DES3
lostdoor.py:from Crypto.Cipher import ARC4
nanocore.py:from Crypto.Cipher import DES, AES
predatorpain.py-deprecated:from Crypto.Cipher import AES
unrecom.py:from Crypto.Cipher import ARC4
xrat.py:from Crypto.Cipher import AES, XOR

[botherder]

@SpaceYacht that would be great.