'''
How do I get this code to fail and give me the following message?:
Key = 99
Error: Key is not Found!
I am given the following, and need to fill in anything with a #TODO:
'''
'''Caesar Cipher Encryption function'''
def caesar_cipher_encrypt(text, key, a):
text = text.upper()
encrypted_Text = ""
for i in text:
if i in a:
index = (a.find(i) + key) % len(a)
encrypted_Text = encrypted_Text + a[index]
else:
encrypted_Text = encrypted_Text + i
return encrypted_Text
'''Caesar Cipher Decrypt function'''
def caesar_cipher_decrypt(text, key, a):
text = text.upper()
decrypted_Text = ""
for i in text:
if i in a:
index = (a.find(i) - key) % len(a)
decrypted_Text = decrypted_Text + a[index]
else:
decrypted_Text = decrypted_Text + i
return decrypted_Text
'''
TODO Create a function called caesar_hack( text, a, check ) that takes a Caesar Cipher encrypted message, an alphabet list, and the original message in main.
This function will attempt to hack an encrypted message. Use a nested for loop to find the key between 0 & 25.
Check where the letter is found in the alphabet list based on the encrypted text letter sent to this function.
Check if the decrypted message is the same as the original message.
# If a key is found , return the key value and the decrypted message.
If not found return 99 as the key and "Error: Key not found!" as the message.
'''
def caesar_hack(text, a, check):
for i in range(0,25):
decrpt_text = caesar_cipher_decrypt(text, i, a)
if decrpt_text.lower() == check.lower():
return i, decrpt_text
return 99,"Error: Key not found!"
if __name__ == "__main__":
alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
text = "This is a secret message"
shift = int(input()) #Number between 1 & 25
encrypted_data = caesar_cipher_encrypt(text, shift, alphabet)
print('Brute Force Hack Attempt: ')
print ('Encrypted Message: ', encrypted_data)
'''
# TODO: Add a call to caesar_hack (encrypted_data, alphabet, text) return it to two variables k (key) & h (hacked message)
k, h = caesar_hack (encrypted_data, alphabet, text)
if k == 99:
print(h)
else:
print("Successful Attempt found! Key =",k)
print("Secret message:",h)
# TODO: If k == 99 print the returned message
# Else - print 'Successful Attempt found! Key =' k variable
# Add a print 'Secret message:' h variable '''