On Tue, Sep 28, 2004 at 10:55:39AM +0200, Tomasz Ostrowski wrote: > I have written a quick and dirty checking for corrupt jpeg files in > mimedefang-filter. It uses program "djpeg", which should be in most > Linux and Unices distributions, to convert the file to bitmap writing > in /dev/null. It lets the file in, if it manages to successfully convert > it, or rejects it otherwise. > > It should catch the latest JPEG virus. At least it catches the sample > I have found here: > http://www.easynews.com/virus.html > > ################################################################### > # New function: check for corrupted JPEG files > sub filter_corrupt_jpeg ($) { > my($entity) = @_; > > if (re_match($entity, '\.jp(e?)g$') ) { > my $bh = $entity->bodyhandle(); > if (defined($bh)) { > my $path = $bh->path(); > if (defined($path)) { > my($code, $category, $action) = > run_virus_scanner( "djpeg -fast -dither none -grayscale -scale > 1/8 -outfile /dev/null $path" ); > ... FYI on the Amavis ml, someone provided a code for a custom JPEG av_scanner (without using an external command such as djpeg : see the top of : http://www.daleenterprise.com/tools/
SL/ --- Stephane Lentz AES TSC _______________________________________________ Visit http://www.mimedefang.org and http://www.canit.ca MIMEDefang mailing list [EMAIL PROTECTED] http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
