A simple Python module that uses the Fernet secure algorithm to encrypt your Python objects with just one line of code.
Simply install using the Python package manager:
pip install friendlycrypto
from friendlycrypto import Cryptographer
with open('img.png', 'rb') as original_f:
# Loads some file in a 'read-bytes' mode.
original_data = original_f.read()
# Encoding the password string into a bytes-string.
key = input("Key for encryption: ").encode('utf8')
# Encrypt the data using the 'Cryptographer' object
grapher = Cryptographer()
encrypted = grapher.encrypt(original_data, key)
with open('img.png.encrypted', 'wb') as encrypted_f:
# Write the encrypted data back into a new file.
encrypted_f.write(encrypted)
from friendlycrypto import FriendlyCryptographer
# The data can be any Python object!
# For this example, we are using a simple dict with strings.
data = {
'user1': 'password',
'user2': 'another-password',
}
# Encoding the password string into a bytes-string.
key = input("Key for encryption: ").encode('utf8')
# Encrypt the data using the 'FriendlyCryptographer' object
grapher = FriendlyCryptographer()
encrypted = grapher.encrypt(data, key)
with open('data.encrypted', 'wb') as encrypted_f:
# Write the encrypted data back into a new file.
encrypted_f.write(encrypted)
The Cryptographer
and FriendlyCryptographer
objects share an init
method
with two additional arguments:
Should be a bytes-string (recommended to be at least 16 bytes long). Those bytes are added to the encrypted data to add additional randomness and uniqueness to your database. The salt shouldn't be stored with the database. generate using the os.urandom function.
Read more about the salt in hashing.
The module uses a key derivation function to convert the given password bytes into a fixed-length bytes string. Each iteration of the function takes time to compute, and thus a larger number of iterations makes it harder for attackers to just guess every option.
The recommended and default value is 100_000
, and on my computer it takes
approximately 0.1 seconds to compute.