66 lines
2.0 KiB
Python
66 lines
2.0 KiB
Python
"""
|
|
Author: Willow Behar
|
|
Date Created: 10/16/20
|
|
Description: A Caesar Cipher coding challenge given by the Crunix Club"
|
|
"""
|
|
|
|
import sys
|
|
|
|
def main():
|
|
#Get Key
|
|
if "-k" in sys.argv:
|
|
key_flag_location = sys.argv.index("-k")
|
|
key = int(sys.argv[key_flag_location + 1])
|
|
if "-E" in sys.argv:
|
|
#Get String
|
|
encrypt_flag_location = sys.argv.index("-E")
|
|
encrypt_string = str(sys.argv[encrypt_flag_location + 1])
|
|
#Encrypt
|
|
print(Encrypt(key, encrypt_string))
|
|
if "-D" in sys.argv:
|
|
#Get String
|
|
decrypt_flag_location = sys.argv.index("-D")
|
|
decrypt_string = sys.argv[decrypt_flag_location + 1]
|
|
#Decrypt
|
|
print(Decrypt(key, decrypt_string))
|
|
if "-h" in sys.argv:
|
|
#Help
|
|
print("Help")
|
|
|
|
def Encrypt(key, phrase):
|
|
new_string = ""
|
|
for letter in phrase:
|
|
letter_value = ord(letter)
|
|
#Lowercase
|
|
if 97 <= letter_value <= 122:
|
|
letter_value += key
|
|
if letter_value > 122:
|
|
while letter_value > 122:
|
|
offset = letter_value - 122
|
|
letter_value = 96 + offset
|
|
if letter_value < 97:
|
|
while letter_value < 97:
|
|
offset = letter_value - 97
|
|
letter_value = 123 + offset
|
|
new_string += chr(letter_value)
|
|
#Uppercase
|
|
elif 65 <= letter_value <= 90:
|
|
letter_value += key
|
|
if letter_value > 90:
|
|
while letter_value > 90:
|
|
offset = letter_value - 90
|
|
letter_value = 64 + offset
|
|
if letter_value < 65:
|
|
while letter_value < 65:
|
|
offset = letter_value - 65
|
|
letter_value = 91 + offset
|
|
new_string += chr(letter_value)
|
|
else:
|
|
new_string += letter
|
|
return new_string
|
|
|
|
def Decrypt(key, phrase):
|
|
return Encrypt(-key, phrase)
|
|
|
|
if __name__ == "__main__":
|
|
main() |