caesars_cipher_python

Caesar's cipher encryption, decryption & cracking tools
git clone git://mcdim.xyz/caesars_cipher_python.git
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cde.py (877B)

      1 # Python implementation of the Caesar cipher (decryption script)#
      2 # MCD 2020 #
      3 import sys
      4 
      5 alphabet_doubled = ["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z","a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]
      6 
      7 def decrypt():
      8 	de_text = ""
      9 	for character in en_text:
     10 		count = 0
     11 		for alph_car in alphabet_doubled[:26]:
     12 			count = count + 1
     13 			if alph_car == character:
     14 				de_text = de_text + alphabet_doubled[count+value+26]
     15 				break
     16 			elif count >= 26:
     17 				de_text = de_text + character
     18 	
     19 	print(de_text)
     20 
     21 if( len(sys.argv) > 2 ):
     22 	value = - (int(sys.argv[1]) + 1)
     23 	en_text = sys.argv[2].lower()
     24 	try:
     25 		decrypt()
     26 	except:
     27 	        print("Terminated.")
     28 else:
     29 	print("Usage: python cde.py [VALUE] [EN_TEXT]")
     30 	print("Example: python cde.py 4 \'lipps\'")
     31 	exit(0)