The Dr Quine project consists in writing programs capable of printing themselves. It’s an exercise in self-replication. The name comes from the philosopher Willard Van Orman Quine, who gave his name to the concept of quine in computer science. Why this project is both fun… and a real headache There’s something unique about the Dr Quine project: from a utilitarian point of view, it serves no purpose, yet it’s extremely instructive. ...
This program is a libsodium-based encryption/decryption tool for sensitive files using the XChaCha20-Poly1305 algorithm. It simulates ransomware behavior in a controlled way: it encrypts or decrypts files in a specific folder depending on their extension. Functionality Generate random key and encrypt file Check if my file is encrypted Wannacry extensions The stockholm program implements a file-targeting strategy similar to that used by the WannaCry ransomware: It encrypts only files whose extension appears in a specific list of sensitive formats, such as .doc, .xls, .pdf, .jpg, .zip etc. ...
Create a simplified reimplementation of the UNIX ping command, which sends ICMP packets to an IP address and measures the response time. Doing this project to reimplement the ping command in C allowed me to delve into the lower layers of network operation, in particular the ICMP protocol. Unlike using ready-made tools or high-level libraries, here I had to manually build network packets and manage sockets directly Understanding the ICMP protocol: by constructing the ICMP headers myself (type, code, checksum), I better understood the structure and role of the ECHO_REQUEST and ECHO_REPLY messages. ...