I was working with fernet to encrypt. In the tests I founded that if I change the last character of the key, fernet it is able to dencrypt.
For example if the key is ZwvCXUGvnG0RvkhNszIQsQOqz8yaKjUSJpxraDVsxd4= and i type ZwvCXUGvnG0RvkhNszIQsQOqz8yaKjUSJpxraDVsxd5= instead, the program dencrypt my code. I founded this error bc i was lazy to copy a whole new key, so i decided to only change the last character. This happen with every consecuent character in the last one character of the key.
If anyone could help me i would be very thankfull
This is my code
from cryptography.fernet import Fernet
text1="""Find me and follow me through corridors, refectories and files
You must follow, leave this academic factory
You'll find me in the matinée, the dark of the matinée
It's better in the matinée, the dark of the matinée is mine
Yes, it's mine"""
def crearLLave():
key=Fernet.generate_key()
print(key.decode())
return Fernet(key)
def crearLLaveManual(llave):
try:
return Fernet(llave)
except:
again=bytes(input("Formato incorrecto "), "ascii")
return crearLLaveManual(again)
def encriptarTexto(cadena, llave):
return llave.encrypt(str.encode(cadena))
def desencriptarTexto(cadena_encriptada, llave):
try:
return llave.decrypt(cadena_encriptada).decode()
except:
cadena=bytes(input("La cámara de los secretos no se abrirá, intente de nuevo: "),"ascii")
return desencriptarTexto(cadena_encriptada, crearLLaveManual(cadena))
llave=crearLLave()
texto_encriptado=encriptarTexto(text1, llave)
print("La cadena encriptada es: ",texto_encriptado.decode())
cadenaLlave=bytes(input("Escriba la llave para desencriptar el texto: "), "ascii")
llaveManual=crearLLaveManual(cadenaLlave)
print("El texto desencriptado es: ",desencriptarTexto(texto_encriptado, llaveManual))
Console Message:
lIX2AfP-cyFRNgYgFRf3Sy3uKQ4Hrr4Lvrn12wFGo30=
La cadena encriptada es: gAAAAABjg7kdWTCIRjIrIAFk2fQg-znc1zRdrc7VaTkjcKZL1RZ2jmCjvf6NlzQ-39yxh0BMXY0FkrBTN0Ky51HiGy9cxmlbpZ7_Jwp6wml2DsMkCWf7h49EYLN8hjtpzFoiTUy7coguSXgFDBVVyucAUhgcn1EzleHJ_pKlDsyw6EnNLVBqUkmI8WYOY5NwEfCKx3UUlvV3dYDZqjeVqMX90CaAueUMtgDvcVP77tkngK7U2jfneH85bxBo8LJooenFnVeqNxwc70a8vY-GmOihnbDyAOT-GYwmLMssMP5QYDWNBnnTEmMSm4Dt-OHCvOYRyie82T6Art6PK5miinVsjsvkXpd6g343tmNSg34XMbMqgTIILXB7t6gZqdfnpUNUJ6vLfQvM4s4bYSltEEgTSIwrMUUUbA==
Escriba la llave para desencriptar el texto: lIX2AfP-cyFRNgYgFRf3Sy3uKQ4Hrr4Lvrn12wFGo31=
El texto desencriptado es: Find me and follow me through corridors, refectories and files You must follow, leave this academic factory You'll find me in the matinée, the dark of the matinée It's better in the matinée, the dark of the matinée is mine Yes, it's mine
