This tool was created as a school project, it may be not suitable for your direct use.
Tool is trying to crack ECC with brute force. This aproach is not working in real world scenarios. Tool can be used only for small EC.
Tool can by executed through Makefile. Insert desired public key to publicKey variable.
make decipher publicKey="(0x6863aeecb4af52b068aed5c8e3bf2d7030b7c46e16609ce2ba2af1c9c54c116, 0xe69b3f636feb14eb303579a28477e0e8880fb697580c2092c57007c79cb000bd)"