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Add autoclave cipher #8029

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Merged
merged 11 commits into from
Dec 18, 2022
Merged

Add autoclave cipher #8029

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8ecf498
Add autoclave cipher
VictorRS27 Dec 14, 2022
3ebfbd7
Update autoclave with the given suggestions
VictorRS27 Dec 18, 2022
820d22a
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Dec 18, 2022
4c4f557
Fixing errors
VictorRS27 Dec 18, 2022
3a2e91d
Another fixes
VictorRS27 Dec 18, 2022
b72a636
Update and rename autoclave.py to autokey.py
cclauss Dec 18, 2022
b605697
Rename gaussian_naive_bayes.py to gaussian_naive_bayes.py.broken.txt
cclauss Dec 18, 2022
05be756
Rename gradient_boosting_regressor.py to gradient_boosting_regressor.…
cclauss Dec 18, 2022
876e857
Rename random_forest_classifier.py to random_forest_classifier.py.bro…
cclauss Dec 18, 2022
cce6b5a
Rename random_forest_regressor.py to random_forest_regressor.py.broke…
cclauss Dec 18, 2022
fe83673
Rename equal_loudness_filter.py to equal_loudness_filter.py.broken.txt
cclauss Dec 18, 2022
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111 changes: 111 additions & 0 deletions ciphers/autoclave.py
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def encrypt(plaintext, key) -> str:
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Suggested change
def encrypt(plaintext, key) -> str:
def encrypt(plaintext, key) -> str:

These parameters need to be typehinted

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@cclauss cclauss Dec 15, 2022 •
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Clave is Latin for key so the more popular name for this algorithm is autokey.

Suggested change
def encrypt(plaintext, key) -> str:
”””
https://en.wikipedia.org/wiki/Autokey_cipher
> An autokey cipher (also known as the autoclave cipher) is a cipher that incorporates the message (the plaintext into the key. The key is generated from the message in some automated fashion, sometimes by selecting certain letters from the text or, more commonly, by adding a short primer key to the front of the message.
”””
def encrypt(plaintext: str, key: str) -> str:

"""
Function that encrypt a given plaintext (string)
and key (string), returning the encrypted ciphertext

@params
plaintext - a normal text to be encrypted (string)
key - a small text or word to start the replacing (sFtring)

@return
A string with the ciphertext

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Suggested change
@params
plaintext - a normal text to be encrypted (string)
key - a small text or word to start the replacing (sFtring)
@return
A string with the ciphertext

Typically, we want the parameter names to be self-documenting so this isn't really necessary

>>> encrypt("hello world", "coffee")
'jsqqs avvwo'
"""
if type(plaintext) != str:
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PEP8: Use isinstance(plaintext, str) instead of directly comparing types.

raise TypeError("plaintext must be a string")
if type(key) != str:
raise TypeError("key must be a string")

if plaintext == "":
raise ValueError("plaintext is empty")
if key == "":
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Suggested change
if plaintext == "":
raise ValueError("plaintext is empty")
if key == "":
if not plaintext:
raise ValueError("plaintext is empty")
if not key:

raise ValueError("key is empty")

key = key + plaintext
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Suggested change
key = key + plaintext
key += plaintext

plaintext = plaintext.lower()
key = key.lower()
plaintext_iterator = 0
key_iterator = 0
ciphertext = ""
while plaintext_iterator < len(plaintext):
if (
ord(plaintext[plaintext_iterator]) < 97
or ord(plaintext[plaintext_iterator]) > 122
):
ciphertext += plaintext[plaintext_iterator]
plaintext_iterator += 1
elif ord(key[key_iterator]) < 97 or ord(key[key_iterator]) > 122:
key_iterator += 1
else:
ciphertext += chr(
(
(ord(plaintext[plaintext_iterator]) - 97 + ord(key[key_iterator]))
- 97
)
% 26
+ 97
)
key_iterator += 1
plaintext_iterator += 1
return ciphertext


def decrypt(ciphertext: str, key: str) -> str:
"""
Function that decrypt a given ciphertext (string)
and key (string), returning the decrypted ciphertext

@params
ciphertext - a normal text to be decrypted (string)
key - a small text or word used to encrypt (string)

@return
A string with the ciphertext

>>> decrypt("jsqqs avvwo", "coffee")
'hello world'
"""
if type(ciphertext) != str:
raise TypeError("ciphertext must be a string")
if type(key) != str:
raise TypeError("key must be a string")

if ciphertext == "":
raise ValueError("ciphertext is empty")
if key == "":
raise ValueError("key is empty")
ciphertext_iterator = 0
key_iterator = 0
plaintext = ""
while ciphertext_iterator < len(ciphertext):
if (
ord(ciphertext[ciphertext_iterator]) < 97
or ord(ciphertext[ciphertext_iterator]) > 122
):
plaintext += ciphertext[ciphertext_iterator]
else:
plaintext += chr(
(ord(ciphertext[ciphertext_iterator]) - ord(key[key_iterator])) % 26
+ 97
)
key += chr(
(ord(ciphertext[ciphertext_iterator]) - ord(key[key_iterator])) % 26
+ 97
)
key_iterator += 1
ciphertext_iterator += 1
return plaintext


operation = int(input("Type 1 to encrypt or 2 to decrypt:"))
if operation == 1:
plaintext = str(input("Typeplaintext to be encrypted:\n"))
key = str(input("Type the key:\n"))
print(encrypt(plaintext, key))
elif operation == 2:
ciphertext = str(input("Type the ciphertext to be decrypted:\n"))
key = str(input("Type the key:\n"))
print(decrypt(ciphertext, key))
decrypt("jsqqs avvwo", "coffee")
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please move this into an if __name__ == "__main__": block