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Regarding backreading (and fowrard too, honestly)... you can store files in .zip (ie not compressed at all). Some of those files could be a pretty valid .zip fi
by justsomehnguy 3y ago
Regarding backreading (and fowrard too, honestly)... you can store files in .zip (ie not compressed at all). Some of those files could be a pretty valid .zip files too. *grin*
- rhymeshot 3y agoHow about a .zip that stores a copy of itself? https://alf.nu/ZipQuine https://alf.nu/ZipQuine
- justsomehnguy 3y agoHow about zip-bombs?
- masklinn 3y agoAn other fun trick is that zip being back-read means it can be smushed together with a file that’s forwards-read, and you get a dual-format file. That was a common way to smuggle archives on image boards. pico-8 does that by design, the “cartridges” are image files, except it uses steganography to encode the program in the image instead of just smuggling.
- semi 3y agothis is also how self extracting executables work. It's just a program that extracts whatever zip file exists after the program itself. Rename it from exe to zip and you have a valid zip file that just happens to have windows executable code before the start of the zip contents