On Sun, Jan 09, 2005 at 04:22:35PM -0500, Ofer Shezaf wrote:
> Do you think that matching extension and content type header would be
> enough? If no, are you aware of any technology to determine a file type
> according to its content?
Name : file
URL : ftp://ftp.gw.com/mirrors/pub/unix/file/
Summary : A utility for determining file types.
Description :
The file command is used to identify a particular file according to the
type of data contained by the file. File can identify many different
file types, including ELF binaries, system libraries, RPM packages, and
different graphics formats.
% file *.*
activity.png: PNG image data, 598 x 639, 8-bit/color RGB, non-interlaced
apache_chunked.nasl: ISO-8859 English text
eicar.com: ASCII text, with no line terminators
hadi.scr: MS Windows PE 32-bit Intel 80386 GUI executable
hadi.zip: Zip archive data, at least v2.0 to extract
japanesesubway.wmv: Microsoft ASF
jihlava-praha.ps: PostScript document text conforming at level 3.0
music.mp3: MP3 file with ID3 version 2.3.0 tag
Ricany-info.pdf: PDF document, version 1.4
ssl-lwp.pl: a /usr/bin/perl -w script text executable
upgrade.sh: Korn shell script text executable
Martin Mačok
ICT Security Consultant
Received on Jan 10 2005
Intro
