SM4-CBC

A C implementation of SM4-CBC, whose behavior is identical to the SM4-CBC algorithm on CyberChef

How to use it?

Clone this repo in your local system, navigate to the repo directory.

To change the KEY, IV and working mode(decrypt/encrypt), please modify the csgo.sh, where you can easily find these three.

To change the input content, please modify the input file src/in.txt. While it has the .txt suffix, you can actually put any type of content in it, whether text or binary, because the program works with bytes.

If you want to use another C Compiler, feel free to change the Makefile, then don't forget to run make clean afterward.

Finally, to compile and run this program, type:

chmod +x ./csgo.sh
./csgo.sh

You will then find the new src/out.txt, which contains the encrypted content, and src/back.txt, which is the decrypted output of src/back.txt.