litecrypt 0.2.5

Simplifying encryption

Overview

I made this library for personal use to secure some files. It provides support for both fast and highly computationally intensive encryption. Also, it includes a database integration system . This system facilitates the restoration of files to their original state if necessary, and a graphical user interface (GUI) is also included to obviate the need to write code.

Installation

pip install litecrypt

Usage

from litecrypt import CryptFile, gen_key

key = gen_key()
CryptFile('file_of_any.type', key).encrypt()
# the file is now called ==> 'file_of_any.type.crypt

The encryption process is blazingly fast by default, to make it computationally intensive

Do this

from litecrypt import CryptFile, gen_key

key = gen_key()
CryptFile('anyfile.txt',
          key=key,
          intensive_compute=True,
          iteration_rounds=10000
          ).encrypt()

Running intensive_compute with no iteration_rounds sets the rounds to 50 (minimum) by default

To decrypt simply run:

from litecrypt import CryptFile

key = 'THE_KEY_YOU_USED'
CryptFile('anyfile.txt.crypt',key=key).decrypt()

For messages:

from litecrypt import Crypt, gen_key

key = gen_key()
encrypted = Crypt('any message', key).encrypt()  # can also be a bytes message
print(encrypted)  # Check the return value

Details

Algorithm: AES-256 CBC
Layout:

+-------------+  +--------+  +------------+  +-------------+  +-------------+  +------------------+
|    HMAC     | →|   IV   | →|   Salt     | →|  Pepper     | →| Iterations  | →|     KDF ID     |  →
+-------------+  +--------+  +------------+  +-------------+  +-------------+  +------------------+
                              +------------------+
                              |   Ciphertext    ...
                              +------------------+

The main key which is a 32-byte random hex string is provided by gen_key() function.

The higher the number of iterations, the longer it takes to encrypt/decrypt.

• AES Key: 32-byte random value derived from the main key with the KDF, hashed with SHA256 (1 time or [50..100000] times based on the chosen number of iterations) mixed with the Salt.
• HMAC Key: 32-byte random value derived from the main key with the KDF, hashed with SHA256 (1 time or [50..100000] times based on the chosen number of iterations) mixed with the Pepper.
• IV: 16-byte random value.
• Salt: 16-byte random value.
• Pepper: 16-byte random value.
• Iterations: 4-byte fixed value.
• KDF ID: 4-byte fixed value used to auto-determine the Key Derivation Function (KDF) to use.
• Ciphertext: Variable size.

Supported Databases

Currently, supports MySQL, PostgresSQL and SQLite.
Check the docs for more info.

GUI

Here's how it works

https://github.com/AshGw/litecrypt/assets/126174609/190b6ab8-3f8a-4656-9525-dbaf5e56db5e

License

Litecrypt is open-source project & licensed under the MIT License.