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9d745b6156
* updating DIRECTORY.md
* updating DIRECTORY.md
* Fixed accidental commit of file I have't touched
* fixup! Format Python code with psf/black push
* updating DIRECTORY.md
* updating DIRECTORY.md
* Fixed some suggested coding style issues
* Update rsa_key_generator.py
* Update rsa_key_generator.py
Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
Co-authored-by: John Law <johnlaw.po@gmail.com>
111 lines
3.6 KiB
Python
111 lines
3.6 KiB
Python
alphabet = {
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"A": ("ABCDEFGHIJKLM", "NOPQRSTUVWXYZ"),
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"B": ("ABCDEFGHIJKLM", "NOPQRSTUVWXYZ"),
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"C": ("ABCDEFGHIJKLM", "ZNOPQRSTUVWXY"),
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"D": ("ABCDEFGHIJKLM", "ZNOPQRSTUVWXY"),
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"E": ("ABCDEFGHIJKLM", "YZNOPQRSTUVWX"),
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"F": ("ABCDEFGHIJKLM", "YZNOPQRSTUVWX"),
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"G": ("ABCDEFGHIJKLM", "XYZNOPQRSTUVW"),
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"H": ("ABCDEFGHIJKLM", "XYZNOPQRSTUVW"),
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"I": ("ABCDEFGHIJKLM", "WXYZNOPQRSTUV"),
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"J": ("ABCDEFGHIJKLM", "WXYZNOPQRSTUV"),
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"K": ("ABCDEFGHIJKLM", "VWXYZNOPQRSTU"),
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"L": ("ABCDEFGHIJKLM", "VWXYZNOPQRSTU"),
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"M": ("ABCDEFGHIJKLM", "UVWXYZNOPQRST"),
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"N": ("ABCDEFGHIJKLM", "UVWXYZNOPQRST"),
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"O": ("ABCDEFGHIJKLM", "TUVWXYZNOPQRS"),
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"P": ("ABCDEFGHIJKLM", "TUVWXYZNOPQRS"),
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"Q": ("ABCDEFGHIJKLM", "STUVWXYZNOPQR"),
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"R": ("ABCDEFGHIJKLM", "STUVWXYZNOPQR"),
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"S": ("ABCDEFGHIJKLM", "RSTUVWXYZNOPQ"),
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"T": ("ABCDEFGHIJKLM", "RSTUVWXYZNOPQ"),
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"U": ("ABCDEFGHIJKLM", "QRSTUVWXYZNOP"),
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"V": ("ABCDEFGHIJKLM", "QRSTUVWXYZNOP"),
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"W": ("ABCDEFGHIJKLM", "PQRSTUVWXYZNO"),
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"X": ("ABCDEFGHIJKLM", "PQRSTUVWXYZNO"),
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"Y": ("ABCDEFGHIJKLM", "OPQRSTUVWXYZN"),
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"Z": ("ABCDEFGHIJKLM", "OPQRSTUVWXYZN"),
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}
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def generate_table(key: str) -> [(str, str)]:
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"""
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>>> generate_table('marvin') # doctest: +NORMALIZE_WHITESPACE
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[('ABCDEFGHIJKLM', 'UVWXYZNOPQRST'), ('ABCDEFGHIJKLM', 'NOPQRSTUVWXYZ'),
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('ABCDEFGHIJKLM', 'STUVWXYZNOPQR'), ('ABCDEFGHIJKLM', 'QRSTUVWXYZNOP'),
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('ABCDEFGHIJKLM', 'WXYZNOPQRSTUV'), ('ABCDEFGHIJKLM', 'UVWXYZNOPQRST')]
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"""
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return [alphabet[char] for char in key.upper()]
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def encrypt(key: str, words: str) -> str:
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"""
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>>> encrypt('marvin', 'jessica')
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'QRACRWU'
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"""
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cipher = ""
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count = 0
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table = generate_table(key)
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for char in words.upper():
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cipher += get_opponent(table[count], char)
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count = (count + 1) % len(table)
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return cipher
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def decrypt(key: str, words: str) -> str:
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"""
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>>> decrypt('marvin', 'QRACRWU')
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'JESSICA'
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"""
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return encrypt(key, words)
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def get_position(table: [(str, str)], char: str) -> (int, int) or (None, None):
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"""
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>>> table = [
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... ('ABCDEFGHIJKLM', 'UVWXYZNOPQRST'), ('ABCDEFGHIJKLM', 'NOPQRSTUVWXYZ'),
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... ('ABCDEFGHIJKLM', 'STUVWXYZNOPQR'), ('ABCDEFGHIJKLM', 'QRSTUVWXYZNOP'),
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... ('ABCDEFGHIJKLM', 'WXYZNOPQRSTUV'), ('ABCDEFGHIJKLM', 'UVWXYZNOPQRST')]
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>>> get_position(table, 'A')
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(None, None)
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"""
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if char in table[0]:
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row = 0
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else:
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row = 1 if char in table[1] else -1
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return (None, None) if row == -1 else (row, table[row].index(char))
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def get_opponent(table: [(str, str)], char: str) -> str:
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"""
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>>> table = [
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... ('ABCDEFGHIJKLM', 'UVWXYZNOPQRST'), ('ABCDEFGHIJKLM', 'NOPQRSTUVWXYZ'),
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... ('ABCDEFGHIJKLM', 'STUVWXYZNOPQR'), ('ABCDEFGHIJKLM', 'QRSTUVWXYZNOP'),
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... ('ABCDEFGHIJKLM', 'WXYZNOPQRSTUV'), ('ABCDEFGHIJKLM', 'UVWXYZNOPQRST')]
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>>> get_opponent(table, 'A')
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'A'
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"""
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row, col = get_position(table, char.upper())
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if row == 1:
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return table[0][col]
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else:
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return table[1][col] if row == 0 else char
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if __name__ == "__main__":
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import doctest
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doctest.testmod() # Fist ensure that all our tests are passing...
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"""
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ENTER KEY: marvin
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ENTER TEXT TO ENCRYPT: jessica
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ENCRYPTED: QRACRWU
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DECRYPTED WITH KEY: JESSICA
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"""
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key = input("ENTER KEY: ").strip()
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text = input("ENTER TEXT TO ENCRYPT: ").strip()
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cipher_text = encrypt(key, text)
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print(f"ENCRYPTED: {cipher_text}")
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print(f"DECRYPTED WITH KEY: {decrypt(key, cipher_text)}")
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