def main():
symbols = string.ascii_lowercase
# first argument is the cipher
cipher = sys.argv[1]
# second arugment is the key
key = sys.argv[2]
# 3rd argument is the encrypt/Decrypt
mode = sys.argv[3]
# 4th argument is the input text
input_txt = sys.argv[4]
# 5th arugment is the output text
output_txt = sys.argv[5]
plainText = ''
cipherText = ''
text = open(input_txt)
if mode == 'encrypt':
plainText = text.read()
if mode == 'decrypt':
cipherText = text.read()
if cipher == 'caesar' or cipher == 'Caesar':
caesar = Caesar(key, symbols)
if mode == 'encrypt':
cipherText = open(output_txt, 'w')
cipherText.write(caesar.encrypt(plainText))
cipherText.close()
if mode == 'decrypt':
plainText = open(output_txt, 'w')
plainText.write(caesar.decrypt(cipherText))
plainText.close()
if cipher == 'playfair' or cipher == 'Playfair':
playfair = Playfair(key)
if mode == 'encrypt':
cipherText = open(output_txt, 'w')
cipherText.write(playfair.encrypt(plainText))
cipherText.close()
if mode == 'decrypt':
plainText = open(output_txt, 'w')
plainText.write(playfair.decrypt(cipherText))
plainText.close()
if cipher == 'vigenere' or cipher == 'Vigenere':
vigenere = Vigenere(key, symbols)
if mode == 'encrypt':
cipherText = open(output_txt, 'w')
cipherText.write(vigenere.encrypt(plainText))
cipherText.close()
if mode == 'decrypt':
plainText = open(output_txt, 'w')
plainText.write(vigenere.decrypt(cipherText))
plainText.close()
if cipher == 'transposition' or cipher == 'Transposition':
transposition = Transposition(key)
if mode == 'encrypt':
cipherText = open(output_txt, 'w')
cipherText.write(transposition.encrypt(plainText))
cipherText.close()
if mode == 'decrypt':
plainText = open(output_txt, 'w')
plainText.write(transposition.decrypt(cipherText))
plainText.close()
if cipher == 'railfence' or cipher == 'Railfence':
rail = RailFence(key)
if mode == 'encrypt':
cipherText = open(output_txt, 'w')
cipherText.write(rail.encrypt(plainText))
cipherText.close()
if mode == 'decrypt':
plainText = open(output_txt, 'w')
plainText.write(rail.decrypt(cipherText))
plainText.close()