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| 1 | def getMode(): | |
| 2 | while True: | |
| 3 | print("Do you wish to encrypt[1] or decrypt[2]")
| |
| 4 | mode = input("Please enter '1' or '2': ")
| |
| 5 | if mode == '1' or mode == '2': | |
| 6 | return mode | |
| 7 | else: | |
| 8 | print("Invalid")
| |
| 9 | ||
| 10 | ||
| 11 | ||
| 12 | ||
| 13 | def getMessage(): | |
| 14 | message = input("message: ")
| |
| 15 | print("Message accepted")
| |
| 16 | return message | |
| 17 | ||
| 18 | ||
| 19 | ||
| 20 | def keyword(): | |
| 21 | while True: | |
| 22 | keyword = input("Keyword: ")
| |
| 23 | check = keyword.isalpha() | |
| 24 | if check == True: | |
| 25 | print("Keyword accepted!")
| |
| 26 | return keyword | |
| 27 | else: | |
| 28 | print("Keyword invalid, try again")
| |
| 29 | ||
| 30 | ||
| 31 | def makeList(): | |
| 32 | counter = 0 | |
| 33 | for char in keyword: | |
| 34 | letter = keyword[counter] | |
| 35 | letterList.append(letter) | |
| 36 | counter += 1 | |
| 37 | return letterList | |
| 38 | ||
| 39 | def crypt(): | |
| 40 | newMessage = '' | |
| 41 | counter = 0 | |
| 42 | for char in message: | |
| 43 | if char.isalpha(): | |
| 44 | num = ord(char) | |
| 45 | num2 = ord(letterList[counter]) | |
| 46 | if mode == '1': | |
| 47 | newNum = num + num2 - 64 | |
| 48 | elif mode == '2': | |
| 49 | newNum = num - num2 + 64 | |
| 50 | while newNum > ord('Z'):
| |
| 51 | newNum -= 26 | |
| 52 | while newNum < ord('A'):
| |
| 53 | newNum += 26 | |
| 54 | newChar = chr(newNum) | |
| 55 | newMessage += newChar | |
| 56 | counter += 1 | |
| 57 | if counter >= length: | |
| 58 | counter = 0 | |
| 59 | else: | |
| 60 | counter = counter | |
| 61 | else: | |
| 62 | newMessage += char | |
| 63 | return newMessage | |
| 64 | ||
| 65 | ||
| 66 | mode = getMode() | |
| 67 | message = getMessage() | |
| 68 | message = message.upper() | |
| 69 | keyword = keyword() | |
| 70 | length = len(keyword) | |
| 71 | letterList = [] | |
| 72 | ||
| 73 | letterList = makeList() | |
| 74 | newMessage = crypt() | |
| 75 | print("Your new message is", newMessage)
| |
| 76 | input("Press enter to end program") |
