Coding our own little packer

[azfk]

I'm just curious about this because if we were to code our own packers, it would be a great learning experience in programming, improving our thinking skills (doing anything really), and understand how to unpack better,

I've made my own little project, I'm just going to generate a few keys and encrypt blocks of data accordingly, but I'm still stuck on how the unpacking stub works, do I code it manually beforehand and just write the code over what I'm protecting? If so that seems godawful for more complex packers like execryptor and themida so I think thats impractical, or is it an engine? If so... I would need to code my own engine?

any comments? thoughts, ideas,

will be appreciated

[atom0s]

I would highly recommend looking into the UPX source for some info and guidance.