Thank you very much for pointing to the sources, Frank! Let me have a look at them, then...
On Wed, Mar 3, 2010 at 3:53 PM, Frank Warmerdam <warmer...@pobox.com> wrote: > Yilmaz Arslanoglu wrote: >> >> Hi all; >> >> One of our customer wants to share their data which is in ESRI Shapefile >> format. >> However, they also would like to limit the usage of this data such >> that the contents >> will be utilized only through our software, and not for any other >> purposes. >> >> Does anybody have a suggestion about how this could be achieved ? >> Does GDAL have any related encryption based support, and is there any >> GDAL supported encrypted vector formats that we can convert it into? > > Yilmaz, > > There are no encrypted GDAL or OGR formats that come to mind. > > My suggestion is that you encrypt the shapefile(s) using some > generic encryption and then implement a VSI*L filesystem handler > for /vsiyilmazencrypt/ that would decrypt the data on the fly as > it is read. > > The VSI*L file access layer provides for library and application > supplied custom file io handlers. There are several examples of > implementations in gdal/port including cpl_vsil_subfile.cpp and > cpl_vsil_mem.cpp and cpl_vsil_unix_stdio_64.cpp. > > I'm sure a good search on encryption libraries will turn up various > options for encryption libraries. > > Best regards, > -- > ---------------------------------------+-------------------------------------- > I set the clouds in motion - turn up | Frank Warmerdam, > warmer...@pobox.com > light and sound - activate the windows | http://pobox.com/~warmerdam > and watch the world go round - Rush | Geospatial Programmer for Rent > > _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
