An educational tool for studying classical cryptography schemes. Do not encrypt anything of worth with this library.

Included Ciphers:

• Caesar

• Affine (Linear)

• Substitution

• Stream

• Vigenere

• Enigma (Wehrmacht Enigma I)

Thanks to polymorphism, we can generate keys and encrypt ByteStrings without worrying much about types:

> import Crypto.Classical
> import Lens.Micro
> :set -XOverloadedStrings
> (\k -> _enigma $ encrypt k "What a great day for an attack!") . key <$> prng
"PXQS D KXSGB CFC AYK XJ DEGMON!"
> (\k -> _caesar $ encrypt k "What a great day for an attack!") . key <$> prng
"RCVO V BMZVO YVT AJM VI VOOVXF!"

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