[vox-tech] unzip producing output that is garbage

[Richard Mancusi]

Newer versions of PKZIP have included an AES encryption module in
addition to the standard (and open) PKZIP algorithm. Perhaps the
archive is using that system, rendering it unreadable to the other
programs?  Following is an old link whose info may not still be valid.

Source: http://www.eweek.com/article2/0,1895,1257562,00.asp

Rich



On 4/9/06, Dylan Beaudette <dylan.beaudette at gmail.com> wrote:
> Howdy,
>
> downloaded some data from the seamless.usgs.gov website, only to find that the
> ZIP archives that it delivered expanded to garbage!
>
> running `file` on all of the contents returned "data", when other types should
> have been recognized. Also, a tiff file that was included in the archive is
> not being recognized as a tiff in any program. Text files have extra garbage
> near the top of the files.
>
> Any thoughts on what could be causing this?
>
> I have tried `unzip -b`  as well, trying to force the un-archiving of the tiff
> file as binary, but without luck.
>
> Any thoughts/ ideas?
>
> Thanks!
>
> --
> Dylan Beaudette
> Soils and Biogeochemistry Graduate Group
> University of California at Davis
> 530.754.7341
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