Python/ciphers/simple_substitution_cipher.py at master · ivan53/Python · GitHub

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importrandom
importsys

LETTERS="ABCDEFGHIJKLMNOPQRSTUVWXYZ"


defmain() ->None:
message=input("Enter message: ")
key="LFWOAYUISVKMNXPBDCRJTQEGHZ"
resp=input("Encrypt/Decrypt [e/d]: ")

check_valid_key(key)

ifresp.lower().startswith("e"):
mode="encrypt"
translated=encrypt_message(key, message)
elifresp.lower().startswith("d"):
mode="decrypt"
translated=decrypt_message(key, message)

print(f"\n{mode.title()}ion: \n{translated}")


defcheck_valid_key(key: str) ->None:
key_list=list(key)
letters_list=list(LETTERS)
key_list.sort()
letters_list.sort()

ifkey_list!=letters_list:
sys.exit("Error in the key or symbol set.")


defencrypt_message(key: str, message: str) ->str:
"""
 >>> encrypt_message('LFWOAYUISVKMNXPBDCRJTQEGHZ', 'Harshil Darji')
 'Ilcrism Olcvs'
 """
returntranslate_message(key, message, "encrypt")


defdecrypt_message(key: str, message: str) ->str:
"""
 >>> decrypt_message('LFWOAYUISVKMNXPBDCRJTQEGHZ', 'Ilcrism Olcvs')
 'Harshil Darji'
 """
returntranslate_message(key, message, "decrypt")


deftranslate_message(key: str, message: str, mode: str) ->str:
translated=""
chars_a=LETTERS
chars_b=key

ifmode=="decrypt":
chars_a, chars_b=chars_b, chars_a

forsymbolinmessage:
ifsymbol.upper() inchars_a:
sym_index=chars_a.find(symbol.upper())
ifsymbol.isupper():
translated+=chars_b[sym_index].upper()
else:
translated+=chars_b[sym_index].lower()
else:
translated+=symbol

returntranslated


defget_random_key() ->str:
key=list(LETTERS)
random.shuffle(key)
return"".join(key)


if__name__=="__main__":
main()
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importrandom
importsys

LETTERS="ABCDEFGHIJKLMNOPQRSTUVWXYZ"


defmain() ->None:
message=input("Enter message: ")
key="LFWOAYUISVKMNXPBDCRJTQEGHZ"
resp=input("Encrypt/Decrypt [e/d]: ")

check_valid_key(key)

ifresp.lower().startswith("e"):
mode="encrypt"
translated=encrypt_message(key, message)
elifresp.lower().startswith("d"):
mode="decrypt"
translated=decrypt_message(key, message)

print(f"\n{mode.title()}ion: \n{translated}")


defcheck_valid_key(key: str) ->None:
key_list=list(key)
letters_list=list(LETTERS)
key_list.sort()
letters_list.sort()

ifkey_list!=letters_list:
sys.exit("Error in the key or symbol set.")


defencrypt_message(key: str, message: str) ->str:
"""
 >>> encrypt_message('LFWOAYUISVKMNXPBDCRJTQEGHZ', 'Harshil Darji')
 'Ilcrism Olcvs'
 """
returntranslate_message(key, message, "encrypt")


defdecrypt_message(key: str, message: str) ->str:
"""
 >>> decrypt_message('LFWOAYUISVKMNXPBDCRJTQEGHZ', 'Ilcrism Olcvs')
 'Harshil Darji'
 """
returntranslate_message(key, message, "decrypt")


deftranslate_message(key: str, message: str, mode: str) ->str:
translated=""
chars_a=LETTERS
chars_b=key

ifmode=="decrypt":
chars_a, chars_b=chars_b, chars_a

forsymbolinmessage:
ifsymbol.upper() inchars_a:
sym_index=chars_a.find(symbol.upper())
ifsymbol.isupper():
translated+=chars_b[sym_index].upper()
else:
translated+=chars_b[sym_index].lower()
else:
translated+=symbol

returntranslated


defget_random_key() ->str:
key=list(LETTERS)
random.shuffle(key)
return"".join(key)


if__name__=="__main__":
main()
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importrandom
importsys

LETTERS="ABCDEFGHIJKLMNOPQRSTUVWXYZ"


defmain() ->None:
message=input("Enter message: ")
key="LFWOAYUISVKMNXPBDCRJTQEGHZ"
resp=input("Encrypt/Decrypt [e/d]: ")

check_valid_key(key)

ifresp.lower().startswith("e"):
mode="encrypt"
translated=encrypt_message(key, message)
elifresp.lower().startswith("d"):
mode="decrypt"
translated=decrypt_message(key, message)

print(f"\n{mode.title()}ion: \n{translated}")


defcheck_valid_key(key: str) ->None:
key_list=list(key)
letters_list=list(LETTERS)
key_list.sort()
letters_list.sort()

ifkey_list!=letters_list:
sys.exit("Error in the key or symbol set.")


defencrypt_message(key: str, message: str) ->str:
"""
 >>> encrypt_message('LFWOAYUISVKMNXPBDCRJTQEGHZ', 'Harshil Darji')
 'Ilcrism Olcvs'
 """
returntranslate_message(key, message, "encrypt")


defdecrypt_message(key: str, message: str) ->str:
"""
 >>> decrypt_message('LFWOAYUISVKMNXPBDCRJTQEGHZ', 'Ilcrism Olcvs')
 'Harshil Darji'
 """
returntranslate_message(key, message, "decrypt")


deftranslate_message(key: str, message: str, mode: str) ->str:
translated=""
chars_a=LETTERS
chars_b=key

ifmode=="decrypt":
chars_a, chars_b=chars_b, chars_a

forsymbolinmessage:
ifsymbol.upper() inchars_a:
sym_index=chars_a.find(symbol.upper())
ifsymbol.isupper():
translated+=chars_b[sym_index].upper()
else:
translated+=chars_b[sym_index].lower()
else:
translated+=symbol

returntranslated


defget_random_key() ->str:
key=list(LETTERS)
random.shuffle(key)
return"".join(key)


if__name__=="__main__":
main()
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importrandom
importsys

LETTERS="ABCDEFGHIJKLMNOPQRSTUVWXYZ"


defmain() ->None:
message=input("Enter message: ")
key="LFWOAYUISVKMNXPBDCRJTQEGHZ"
resp=input("Encrypt/Decrypt [e/d]: ")

check_valid_key(key)

ifresp.lower().startswith("e"):
mode="encrypt"
translated=encrypt_message(key, message)
elifresp.lower().startswith("d"):
mode="decrypt"
translated=decrypt_message(key, message)

print(f"\n{mode.title()}ion: \n{translated}")


defcheck_valid_key(key: str) ->None:
key_list=list(key)
letters_list=list(LETTERS)
key_list.sort()
letters_list.sort()

ifkey_list!=letters_list:
sys.exit("Error in the key or symbol set.")


defencrypt_message(key: str, message: str) ->str:
"""
 >>> encrypt_message('LFWOAYUISVKMNXPBDCRJTQEGHZ', 'Harshil Darji')
 'Ilcrism Olcvs'
 """
returntranslate_message(key, message, "encrypt")


defdecrypt_message(key: str, message: str) ->str:
"""
 >>> decrypt_message('LFWOAYUISVKMNXPBDCRJTQEGHZ', 'Ilcrism Olcvs')
 'Harshil Darji'
 """
returntranslate_message(key, message, "decrypt")


deftranslate_message(key: str, message: str, mode: str) ->str:
translated=""
chars_a=LETTERS
chars_b=key

ifmode=="decrypt":
chars_a, chars_b=chars_b, chars_a

forsymbolinmessage:
ifsymbol.upper() inchars_a:
sym_index=chars_a.find(symbol.upper())
ifsymbol.isupper():
translated+=chars_b[sym_index].upper()
else:
translated+=chars_b[sym_index].lower()
else:
translated+=symbol

returntranslated


defget_random_key() ->str:
key=list(LETTERS)
random.shuffle(key)
return"".join(key)


if__name__=="__main__":
main()
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importrandom
importsys

LETTERS="ABCDEFGHIJKLMNOPQRSTUVWXYZ"


defmain() ->None:
message=input("Enter message: ")
key="LFWOAYUISVKMNXPBDCRJTQEGHZ"
resp=input("Encrypt/Decrypt [e/d]: ")

check_valid_key(key)

ifresp.lower().startswith("e"):
mode="encrypt"
translated=encrypt_message(key, message)
elifresp.lower().startswith("d"):
mode="decrypt"
translated=decrypt_message(key, message)

print(f"\n{mode.title()}ion: \n{translated}")


defcheck_valid_key(key: str) ->None:
key_list=list(key)
letters_list=list(LETTERS)
key_list.sort()
letters_list.sort()

ifkey_list!=letters_list:
sys.exit("Error in the key or symbol set.")


defencrypt_message(key: str, message: str) ->str:
"""
 >>> encrypt_message('LFWOAYUISVKMNXPBDCRJTQEGHZ', 'Harshil Darji')
 'Ilcrism Olcvs'
 """
returntranslate_message(key, message, "encrypt")


defdecrypt_message(key: str, message: str) ->str:
"""
 >>> decrypt_message('LFWOAYUISVKMNXPBDCRJTQEGHZ', 'Ilcrism Olcvs')
 'Harshil Darji'
 """
returntranslate_message(key, message, "decrypt")


deftranslate_message(key: str, message: str, mode: str) ->str:
translated=""
chars_a=LETTERS
chars_b=key

ifmode=="decrypt":
chars_a, chars_b=chars_b, chars_a

forsymbolinmessage:
ifsymbol.upper() inchars_a:
sym_index=chars_a.find(symbol.upper())
ifsymbol.isupper():
translated+=chars_b[sym_index].upper()
else:
translated+=chars_b[sym_index].lower()
else:
translated+=symbol

returntranslated


defget_random_key() ->str:
key=list(LETTERS)
random.shuffle(key)
return"".join(key)


if__name__=="__main__":
main()
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importrandom
importsys

LETTERS="ABCDEFGHIJKLMNOPQRSTUVWXYZ"


defmain() ->None:
message=input("Enter message: ")
key="LFWOAYUISVKMNXPBDCRJTQEGHZ"
resp=input("Encrypt/Decrypt [e/d]: ")

check_valid_key(key)

ifresp.lower().startswith("e"):
mode="encrypt"
translated=encrypt_message(key, message)
elifresp.lower().startswith("d"):
mode="decrypt"
translated=decrypt_message(key, message)

print(f"\n{mode.title()}ion: \n{translated}")


defcheck_valid_key(key: str) ->None:
key_list=list(key)
letters_list=list(LETTERS)
key_list.sort()
letters_list.sort()

ifkey_list!=letters_list:
sys.exit("Error in the key or symbol set.")


defencrypt_message(key: str, message: str) ->str:
"""
 >>> encrypt_message('LFWOAYUISVKMNXPBDCRJTQEGHZ', 'Harshil Darji')
 'Ilcrism Olcvs'
 """
returntranslate_message(key, message, "encrypt")


defdecrypt_message(key: str, message: str) ->str:
"""
 >>> decrypt_message('LFWOAYUISVKMNXPBDCRJTQEGHZ', 'Ilcrism Olcvs')
 'Harshil Darji'
 """
returntranslate_message(key, message, "decrypt")


deftranslate_message(key: str, message: str, mode: str) ->str:
translated=""
chars_a=LETTERS
chars_b=key

ifmode=="decrypt":
chars_a, chars_b=chars_b, chars_a

forsymbolinmessage:
ifsymbol.upper() inchars_a:
sym_index=chars_a.find(symbol.upper())
ifsymbol.isupper():
translated+=chars_b[sym_index].upper()
else:
translated+=chars_b[sym_index].lower()
else:
translated+=symbol

returntranslated


defget_random_key() ->str:
key=list(LETTERS)
random.shuffle(key)
return"".join(key)


if__name__=="__main__":
main()
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importrandom
importsys

LETTERS="ABCDEFGHIJKLMNOPQRSTUVWXYZ"


defmain() ->None:
message=input("Enter message: ")
key="LFWOAYUISVKMNXPBDCRJTQEGHZ"
resp=input("Encrypt/Decrypt [e/d]: ")

check_valid_key(key)

ifresp.lower().startswith("e"):
mode="encrypt"
translated=encrypt_message(key, message)
elifresp.lower().startswith("d"):
mode="decrypt"
translated=decrypt_message(key, message)

print(f"\n{mode.title()}ion: \n{translated}")


defcheck_valid_key(key: str) ->None:
key_list=list(key)
letters_list=list(LETTERS)
key_list.sort()
letters_list.sort()

ifkey_list!=letters_list:
sys.exit("Error in the key or symbol set.")


defencrypt_message(key: str, message: str) ->str:
"""
 >>> encrypt_message('LFWOAYUISVKMNXPBDCRJTQEGHZ', 'Harshil Darji')
 'Ilcrism Olcvs'
 """
returntranslate_message(key, message, "encrypt")


defdecrypt_message(key: str, message: str) ->str:
"""
 >>> decrypt_message('LFWOAYUISVKMNXPBDCRJTQEGHZ', 'Ilcrism Olcvs')
 'Harshil Darji'
 """
returntranslate_message(key, message, "decrypt")


deftranslate_message(key: str, message: str, mode: str) ->str:
translated=""
chars_a=LETTERS
chars_b=key

ifmode=="decrypt":
chars_a, chars_b=chars_b, chars_a

forsymbolinmessage:
ifsymbol.upper() inchars_a:
sym_index=chars_a.find(symbol.upper())
ifsymbol.isupper():
translated+=chars_b[sym_index].upper()
else:
translated+=chars_b[sym_index].lower()
else:
translated+=symbol

returntranslated


defget_random_key() ->str:
key=list(LETTERS)
random.shuffle(key)
return"".join(key)


if__name__=="__main__":
main()
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importrandom
importsys

LETTERS="ABCDEFGHIJKLMNOPQRSTUVWXYZ"


defmain() ->None:
message=input("Enter message: ")
key="LFWOAYUISVKMNXPBDCRJTQEGHZ"
resp=input("Encrypt/Decrypt [e/d]: ")

check_valid_key(key)

ifresp.lower().startswith("e"):
mode="encrypt"
translated=encrypt_message(key, message)
elifresp.lower().startswith("d"):
mode="decrypt"
translated=decrypt_message(key, message)

print(f"\n{mode.title()}ion: \n{translated}")


defcheck_valid_key(key: str) ->None:
key_list=list(key)
letters_list=list(LETTERS)
key_list.sort()
letters_list.sort()

ifkey_list!=letters_list:
sys.exit("Error in the key or symbol set.")


defencrypt_message(key: str, message: str) ->str:
"""
 >>> encrypt_message('LFWOAYUISVKMNXPBDCRJTQEGHZ', 'Harshil Darji')
 'Ilcrism Olcvs'
 """
returntranslate_message(key, message, "encrypt")


defdecrypt_message(key: str, message: str) ->str:
"""
 >>> decrypt_message('LFWOAYUISVKMNXPBDCRJTQEGHZ', 'Ilcrism Olcvs')
 'Harshil Darji'
 """
returntranslate_message(key, message, "decrypt")


deftranslate_message(key: str, message: str, mode: str) ->str:
translated=""
chars_a=LETTERS
chars_b=key

ifmode=="decrypt":
chars_a, chars_b=chars_b, chars_a

forsymbolinmessage:
ifsymbol.upper() inchars_a:
sym_index=chars_a.find(symbol.upper())
ifsymbol.isupper():
translated+=chars_b[sym_index].upper()
else:
translated+=chars_b[sym_index].lower()
else:
translated+=symbol

returntranslated


defget_random_key() ->str:
key=list(LETTERS)
random.shuffle(key)
return"".join(key)


if__name__=="__main__":
main()