/bethela

A command line tool for file encryption and decryption (AES256-CBC)

Primary LanguageC++MIT LicenseMIT

bethela - CLI file cryptography

Ubuntu

A simple terminal command line tool for encryption & decryption of any files, currently supports Vigenere, AES128-CBC, AES192-CBC and AES256-CBC ciphers.

The program can also use hardware acceleration technology for AES ciphers using AES-NI (Intel and AMD CPUs) and ARM-neon (armv8, aarch64 CPUs) intrinsics.

Install in Linux

  • Requirement:
    • make
    • compiler that can compile with or above C++17

  1. Clone the repo

    git clone --recurse-submodules https://github.com/mrdcvlsc/bethela
git submodule update --init --recursive
cd bethela

  2. Compile the program

    Example:

    make compile CXX=clang++ VERSION=aesni TYPE=release

    This table shows what values you can pass to a dflag during compilation to alter the compilation behaviour.

    If a variable flag is not specified, the first value in the table below are taken as the default values.

    Variable Value
    CXX g++, clang++
    TYPE release, debug, debug_threads
    VERSION portable, aesni, neon
    LINK dynamic, static

    aesni - will enable hardware acceleration technology AES-NI when compiling for x86-64 Intel and/or AMD CPUs.

    neon - will enable hardware acceleration technology in ARM when compiling for ARM armv8/aarch64 CPUs.

  3. Install the program to usr/local/bin (for linux)

    make install

    To Uninstall the program in usr/local/bin (for linux), use the command below

    make uninstall

Generate a key file:

bethela --generate key_filename key_size_in_bytes

The key size should be a positive number greater than 0

Encrypt/Decrypt with replace

Adding -replace command when encrypting/decrypting will replace the old files with the encrypted/decrypted files.

Vigenere Cipher

Requires any key file sizes.

bethela --encrypt-replace keyfile file1 file2 ... fileN
bethela --decrypt-replace keyfile file1.bthl file2.bthl ... fileN.bthl

AES-128

Requires a 128-bit key, or 16 byte key file size.

bethela --enc-AES128-replace keyfile file1 file2 ... fileN
bethela --dec-AES128-replace keyfile file1.bthl file2.bthl ... fileN.bthl

AES-192

Requires a 192-bit key, or 24 byte key file size.

bethela --enc-AES192-replace keyfile file1 file2 ... fileN
bethela --dec-AES192-replace keyfile file1.bthl file2.bthl ... fileN.bthl

AES-256

Requires a 256-bit key, or 32 byte key file size.

bethela --enc-AES256-replace keyfile file1 file2 ... fileN
bethela --dec-AES256-replace keyfile file1.bthl file2.bthl ... fileN.bthl

Help flag

bethela --help

External Libraries

  • AES - for AES encryption with hardware acceleration support.
  • BytePadding - for simple padding operations.
  • BlockCipherModes - for block cipher encryption modes.