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- #!/usr/bin/python
- import random
- import sys
- #genera la llave con numeros random
- def get_randkey(texto):
- a='0'
- b='9'
- for i in range(0,len(texto)-1):
- a += '0'
- b += '9'
- key = random.randint(int(a), int(b))
- return str(key)
- #utiliza xor para cifrar y descifrar el texto
- def crypt_decrypt(texto, key):
- cipher_text = ""
- for char in texto:
- for ch in key:
- char = chr(ord(char)^ ord(ch))
- cipher_text += char
- return (cipher_text)
- def main():
- while True:
- print """
- 1. Encrypt
- 2. Decrypt
- 3. Change key
- 4. Exit
- --->
- """
- opcion=raw_input()
- if(opcion=='1'):
- texto = raw_input("Message: ")
- key = get_randkey(texto)
- texto = crypt_decrypt(texto,key)
- print "Key: ", key
- print "Encrypted message:\n", texto
- elif(opcion=='2'):
- texto = crypt_decrypt(texto,key)
- print "Decrypted message:\n", texto
- elif(opcion=='3'):
- key = get_randkey(texto)
- print key
- elif(opcion=='4'):
- sys.exit()
- main()
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