encryption Directory Reference

Files
	caesar.c
	Implementation of Caesar cipher.
	caesar.h
	Caesar cipher encryption and decryption.
	main.c
	CLI for Caesar / Vigenère / XOR ciphers + SHA-256 hashing.
	sha256.c
	SHA-256 implementation per FIPS 180-4.
	sha256.h
	Pure-C SHA-256 implementation, written from the FIPS 180-4 spec.
	vigenere.c
	vigenere.h
	Vigenère cipher — polyalphabetic shift keyed by a string.
	xor_cipher.c
	xor_cipher.h
	XOR stream cipher — repeating key.