96 lines
2.8 KiB
Python
96 lines
2.8 KiB
Python
"""
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Author: Willow Behar
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Date Created: 10/16/20
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Description: A Caesar Cipher coding challenge given by the Crunix Club"
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"""
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import sys
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import random
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help_text = """
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NAME
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wcc - Willow Caesar Cipher
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SYNOPSIS
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wcc -k [Cyper Key (Int)] [ENCRYPTION FLAG] [STRING]
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DESCRIPTION
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Encrypt or Decrypt a string using a Caesar Cipher (Warning: Does not change special characters)
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-E
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Encrypts String
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-D
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Decrypts String
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-h
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Prints Help Screen
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AUTHOR
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Written by Willow Behar.
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LICENSING
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GPLv3
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"""
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def main():
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#Help
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if "-h" in sys.argv:
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print(help_text)
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#Get Key
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if "-k" in sys.argv:
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#Find key flag location
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key_flag_location = sys.argv.index("-k")
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#Get Key Integer
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key = int(sys.argv[key_flag_location + 1])
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else:
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#Randomly generate a key
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key = random.randint(0, 100)
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print("Key:", key)
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if "-E" in sys.argv:
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#Get Encrypt Flag Location
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encrypt_flag_location = sys.argv.index("-E")
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#Get String to encrypt
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encrypt_string = str(sys.argv[encrypt_flag_location + 1])
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#Encrypt
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print(Encrypt(key, encrypt_string))
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elif "-D" in sys.argv:
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#Get Decrypt flag location
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decrypt_flag_location = sys.argv.index("-D")
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#Get String
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decrypt_string = sys.argv[decrypt_flag_location + 1]
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#Decrypt
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print(Decrypt(key, decrypt_string))
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else:
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print(help_text)
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def Encrypt(key, phrase):
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new_string = ""
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for letter in phrase:
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letter_value = ord(letter)
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#Lowercase
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if 97 <= letter_value <= 122:
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letter_value += key
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if letter_value > 122:
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while letter_value > 122:
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offset = letter_value - 122
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letter_value = 96 + offset
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if letter_value < 97:
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while letter_value < 97:
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offset = letter_value - 97
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letter_value = 123 + offset
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new_string += chr(letter_value)
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#Uppercase
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elif 65 <= letter_value <= 90:
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letter_value += key
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if letter_value > 90:
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while letter_value > 90:
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offset = letter_value - 90
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letter_value = 64 + offset
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if letter_value < 65:
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while letter_value < 65:
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offset = letter_value - 65
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letter_value = 91 + offset
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new_string += chr(letter_value)
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else:
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new_string += letter
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return new_string
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def Decrypt(key, phrase):
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return Encrypt(-key, phrase)
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if __name__ == "__main__":
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main() |