Round Trip Encryption w/Python

RTencrypt.txt

pip install cryptography

-----------------


from cryptography.fernet import Fernet
from cryptography.hazmat.primitives import hashes
from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
import base64
import os

# Generate a key using a password and a random salt
password = b"password"
salt = os.urandom(16)

kdf = PBKDF2HMAC(
    algorithm=hashes.SHA256(),
    length=32,
    salt=salt,
    iterations=100000,
)

key = base64.urlsafe_b64encode(kdf.derive(password))

# Create a Fernet instance using the generated key
cipher_suite = Fernet(key)

# Read the contents of the file you want to encrypt
with open("input_file.txt", "rb") as file:
    file_data = file.read()

# Encrypt the file data
encrypted_data = cipher_suite.encrypt(file_data)

# Write the encrypted data to a new file
with open("encrypted_file.txt", "wb") as file:
    file.write(encrypted_data)
	
--------------------

from cryptography.fernet import Fernet
import base64

# Read the contents of the encrypted file
with open("encrypted_file.txt", "rb") as file:
    encrypted_data = file.read()

# Generate the key using the same password and salt that was used to encrypt the file
password = b"password"
salt = os.urandom(16)

kdf = PBKDF2HMAC(
    algorithm=hashes.SHA256(),
    length=32,
    salt=salt,
    iterations=100000,
)

key = base64.urlsafe_b64encode(kdf.derive(password))

# Create a Fernet instance using the generated key
cipher_suite = Fernet(key)

# Decrypt the encrypted data
decrypted_data = cipher_suite.decrypt(encrypted_data)

# Write the decrypted data to a new file
with open("decrypted_file.txt", "wb") as file:
    file.write(decrypted_data)