VBScript to Secure Copy files

[ingerulandrei]

Hello

My name is Andrei, and I need some help please. Note that my knowledge about VBscript is very limited.
My problem: I have to copy some jpg/xls files from one location to another (automated script/batch).
But security is essential: I want to make sure that what is copied is actually what it is supposed to be (jpg or xls, not a .exe file renamed, or other files).

Any sort of information is highly appreciated,

Thank you very much,

Andrei

 

[josver]

You'll have to do a binary read of the first bytes of the file, and check the contents for markers the format is supposed to have.
For instance, a .gif starts with GIF, jpeg has TFIF in the first ten bytes etcetera. You'll have to find a list of file extensions and their marker end code that in.

Read this :

http://www.cs.uwec.edu/mics/CD image/papers/paper7.pdf

It talks about magic bytes, which is what I mean