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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>
79 lines
1.8 KiB
Python
79 lines
1.8 KiB
Python
import random
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import sys
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LETTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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def main():
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message = input("Enter message: ")
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key = "LFWOAYUISVKMNXPBDCRJTQEGHZ"
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resp = input("Encrypt/Decrypt [e/d]: ")
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checkValidKey(key)
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if resp.lower().startswith("e"):
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mode = "encrypt"
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translated = encryptMessage(key, message)
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elif resp.lower().startswith("d"):
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mode = "decrypt"
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translated = decryptMessage(key, message)
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print("\n{}ion: \n{}".format(mode.title(), translated))
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def checkValidKey(key: str) -> None:
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keyList = list(key)
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lettersList = list(LETTERS)
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keyList.sort()
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lettersList.sort()
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if keyList != lettersList:
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sys.exit("Error in the key or symbol set.")
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def encryptMessage(key: str, message: str) -> str:
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"""
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>>> encryptMessage('LFWOAYUISVKMNXPBDCRJTQEGHZ', 'Harshil Darji')
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'Ilcrism Olcvs'
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"""
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return translateMessage(key, message, "encrypt")
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def decryptMessage(key: str, message: str) -> str:
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"""
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>>> decryptMessage('LFWOAYUISVKMNXPBDCRJTQEGHZ', 'Ilcrism Olcvs')
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'Harshil Darji'
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"""
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return translateMessage(key, message, "decrypt")
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def translateMessage(key: str, message: str, mode: str) -> str:
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translated = ""
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charsA = LETTERS
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charsB = key
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if mode == "decrypt":
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charsA, charsB = charsB, charsA
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for symbol in message:
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if symbol.upper() in charsA:
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symIndex = charsA.find(symbol.upper())
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if symbol.isupper():
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translated += charsB[symIndex].upper()
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else:
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translated += charsB[symIndex].lower()
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else:
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translated += symbol
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return translated
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def getRandomKey():
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key = list(LETTERS)
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random.shuffle(key)
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return "".join(key)
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if __name__ == "__main__":
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main()
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