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+--- Thread: Encrypt and decrypt in python using own fixed key (/thread-36432.html)
Encrypt and decrypt in python using own fixed key - SriRajesh - Feb-19-2022
Hi I want to encrypt an d decrypt. But I want to use fixed defined key for example: key = "Abcd123". Can some one help how to do it. Thanks in advance. I use below code.
from cryptography.fernet import Fernet
message = "I am python"
key = Fernet.generate_key()
fernet = Fernet(key)
encMessage = fernet.encrypt(message.encode())
print("original string: ", message)
print("encrypted string: ", encMessage)
decMessage = fernet.decrypt(encMessage).decode()
print("decrypted string: ", decMessage)
RE: Encrypt and decrypt in python using own fixed key - dboxall123 - Feb-19-2022
Hi. I can't say that I've ever used the cryptography module, but I got this and modified this from the cryptography website:
import base64
import os
from cryptography.fernet import Fernet
from cryptography.hazmat.primitives import hashes
from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
salt = os.urandom(16)
kdf = PBKDF2HMAC(
algorithm=hashes.SHA256(),
length=32,
salt=salt,
iterations=390000,
)
message = b"I am python"
password = b"Abcd123"
key = base64.urlsafe_b64encode(kdf.derive(password))
f = Fernet(key)
encMessage = f.encrypt(message)
print(encMessage)
decMessage = f.decrypt(encMessage)
print(decMessage.decode('utf-8'))
RE: Encrypt and decrypt in python using own fixed key - SriRajesh - Feb-20-2022
(Feb-19-2022, 01:03 PM)dboxall123 Wrote: Hi. I can't say that I've ever used the cryptography module, but I got this and modified this from the cryptography website:
import base64 import os from cryptography.fernet import Fernet from cryptography.hazmat.primitives import hashes from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC salt = os.urandom(16) kdf = PBKDF2HMAC( algorithm=hashes.SHA256(), length=32, salt=salt, iterations=390000, ) message = b"I am python" password = b"Abcd123" key = base64.urlsafe_b64encode(kdf.derive(password)) f = Fernet(key) encMessage = f.encrypt(message) print(encMessage) decMessage = f.decrypt(encMessage) print(decMessage.decode('utf-8'))
It show error:
TypeError:__init__() missing 1 positional argument:'backend'
RE: Encrypt and decrypt in python using own fixed key - dboxall123 - Feb-20-2022
It's working perfectly here. Post the complete error.