I have a friend. He has a problem. He forgets his archive password. So, he asks me to help him. This is my experience.
Okay, firstly I've never studied this sector, for about 3 years. But, I still remember it. I had him look for crack software. He gave me rarcrack-0.2. I never heard it before.
Maybe, you have known this software. Rarcrack-0.2 build on C Language. You know that C language is the simple one. I don't know where he get it. He gave me in archive packed. as usual, I extract it first.
After extract it, I found the C code. I debug and built it. This is the main page link
OK, happy cracking!