Check whether a zip file is protected by password in Objective-C/iPhone?

Question

Hello friends,

I'm using lib ZipArchive to unzip file on iPhone, it works pretty well, however I met a issue about checking if a zip file is protected by password.

I'm wondering if there's a function to check whether a zip file is protected by password before unzipping, but I didn't get lucky to find an api for that. So does anyone who know how to check it in Objective-C/iPhone or any API in ZipArchive I can use.

Any help would be greatly appreciated.

Answer 1

You can check central directory in archive, and see if encryption bit is set there. However, you will need to read some documentation regarding zip file format.