Checking password protected file

[gpsushil]

How can we check the file is password protected file or not. File can be office 2003 or office 2007 or pdf or archives.

[helios]

You're mixing up (at least) four completely different formats. Why do you need to do this?

[gpsushil]

I want to check all type of files which are password protected in a given drive. My application will list all the files which are password protected. I don't think there's generic soultion to this but type wise it should have some mechanism to check.

[helios]

First you'll need to better define your objective. Decide carefully what formats you want to search. For example, "archive" is too broad: ZIP, 7z, RAR, ARC, ACE, ar, and I could go on.

After that, just research each format and find interfaces so you can check whether a file is encrypted or not.