Welcome to my first public project!
This is a Linux command line executable that can encrypt/decrypt files using the ChaCha encryption algorithm.
If you would like to make a contribution to this project please open up an issue and, instead of submitting code, please submit advice/resources to help me learn what I am doing incorrectly or what I could be doing better. That would help a lot!!!
Do not use this in production code! I am not a Cryptographer and only a novice at C, as such this code is probably really bad! This is just a learning project.
Encrypting a file with a random key and nonce -
chacha -r -e example.txt
Decrypting a file -
chacha -d example.txt.enc -k 000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F -n 000000000000004A00000000
Compile with your compiler of choice.
gcc -O3 main.c chacha.c chacha.h hex.c hex.h -o chacha
If you want to keep the chacha command local to your user move the binary to $HOME/.local/bin/.
cp chacha ~/.local/bin/
The binary can be installed for all users by moving the binary to /usr/local/bin/.
sudo cp chacha /usr/local/bin/
Here are a list of references that I used to guide me along with their accompanying license. I try not to copy paste code.
https://tools.ietf.org/html/rfc8439 - Main reference
The three sources below are "GPL-2.0-or-later" https://www.oryx-embedded.com/doc/chacha_8c_source.html
https://www.oryx-embedded.com/doc/chacha_8h_source.html
https://www.oryx-embedded.com/doc/cpu__endian_8h_source.html