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Add running key cipher #10834

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Merged
merged 5 commits into from
Oct 29, 2023
Merged

Add running key cipher #10834

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960ff5d
Add running key cipher
ArshdeepSingh98 Oct 23, 2023
0de53b9
update running key cipher add doctests and hints
ArshdeepSingh98 Oct 23, 2023
1bf84c4
Add test case
ArshdeepSingh98 Oct 23, 2023
ed55cfc
Update return value
ArshdeepSingh98 Oct 23, 2023
d41b9da
range(len()) is almost always a hint to use enumerate()
cclauss Oct 29, 2023
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39 changes: 39 additions & 0 deletions ciphers/running_key_cipher.py
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def running_key_encrypt(key, plaintext):
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As there is no test file in this pull request nor any test function or class in the file ciphers/running_key_cipher.py, please provide doctest for the function running_key_encrypt

Please provide return type hint for the function: running_key_encrypt. If the function does not return a value, please provide the type hint as: def function() -> None:

Please provide type hint for the parameter: key

Please provide type hint for the parameter: plaintext

plaintext = plaintext.replace(" ", "").upper()
key = key.replace(" ", "").upper()
key_length = len(key)
ciphertext = []

for i in range(len(plaintext)):
p = ord(plaintext[i]) - ord("A")
k = ord(key[i % key_length]) - ord("A")
c = (p + k) % 26
ciphertext.append(chr(c + ord("A")))

return "".join(ciphertext)


def running_key_decrypt(key, ciphertext):
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As there is no test file in this pull request nor any test function or class in the file ciphers/running_key_cipher.py, please provide doctest for the function running_key_decrypt

Please provide return type hint for the function: running_key_decrypt. If the function does not return a value, please provide the type hint as: def function() -> None:

Please provide type hint for the parameter: key

Please provide type hint for the parameter: ciphertext

ciphertext = ciphertext.replace(" ", "").upper()
key = key.replace(" ", "").upper()
key_length = len(key)
plaintext = []

for i in range(len(ciphertext)):
c = ord(ciphertext[i]) - ord("A")
k = ord(key[i % key_length]) - ord("A")
p = (c - k) % 26
plaintext.append(chr(p + ord("A")))

return "".join(plaintext)


if __name__ == "__main__":
key = "How does the duck know that? said Victor"
plaintext = input("Enter the plaintext: ").upper()
encrypted_text = running_key_encrypt(key, plaintext)
decrypted_text = running_key_decrypt(key, encrypted_text)

print("\nPlaintext:", plaintext)
print("Encrypted:", encrypted_text)
print("Decrypted:", decrypted_text)