sbz/keygen

This repository is a nostalgia toy. It is an X11 desktop program that imitates the small 'keygen' applications that pirate scene groups used to ship with cracked software in the 1990s. You run it on Linux or FreeBSD, a window pops up with a title, an image background, and a Generate button. Click the button and it prints a fake 16-character key in the classic XXXX-XXXX-XXXX-XXXX format. There is also chiptune music playing in the background, which the README admits is most of the fun. The author is upfront that the program does not actually unlock anything: 'Keygen are totally useless now because we are free and use Free Software,' the README says. The 'keys' are produced with the C standard library's rand() function seeded from the current time and have no connection to any real software. It is a piece of retro UI that just happens to look like the old keygens. Building it needs a C compiler (GCC or clang) and several development libraries: X11, libxft for font rendering, libjpeg for the background image, libmpg123 for MP3 playback, and ALSA on Linux or the Open Sound System on FreeBSD for actual sound output. To render Japanese kanji on screen, the README points to the KanjiStrokeOrders font from a specific website. After the dependencies are in place, a plain make builds it and ./keygen runs it. Inside the window, a few keys change behavior at runtime. Q or Escape quits, S changes the background image to another file in the img/ folder, M mutes the sound, and N picks a different MP3 from the music collection. The README links to the source of the chiptune music (Fesliyan Studios, royalty free) and notes that the project is mostly meant to be looked at and listened to, not used. The repository has 14 stars and is written in C. There is no networking, no license terms quoted in the README, and no claim of cryptographic strength. It is a small graphical curiosity, a samurai-themed wink at the warez scene of decades past.