How do i check image is .tif while uploading

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I want to upload .tif images .how do i validate the upload from some one who can upload .exe file by changing its extension to .tif.Is any way to avoid such attack in vb.net.
thank you..

Posted 27-Aug-12 1:07am

vishal_h

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Manas Bhardwaj · Answer 1 · 2012-08-27T01:14:00

Solution 1

TIFF can be detected by peeking at first bytes http://local.wasp.uwa.edu.au/~pbourke/dataformats/tiff/

The first 8 bytes forms the header. The first two bytes of which is either "II" for little endian byte ordering or "MM" for big endian byte ordering.

Posted 27-Aug-12 1:14am

Manas Bhardwaj

Comments

__TR__ 27-Aug-12 7:18am

My 5!

Manas Bhardwaj 27-Aug-12 7:21am

thx1

vishal_h 27-Aug-12 7:39am

Is there any example for this in vb.net..

Manas Bhardwaj 27-Aug-12 8:35am

there should be many on internet. :)

Prasad_Kulkarni 27-Aug-12 8:17am

5'ed :D

Manas Bhardwaj 27-Aug-12 8:35am

thx