On Thu, 27 Sep 2012 19:10:29 +0900 Carsten Haitzler (The Rasterman) <ras...@rasterman.com> wrote:
> On Wed, 26 Sep 2012 08:41:00 +0200 Sebastian Dransfeld > <s...@tango.flipp.net> said: > > > On 09/25/2012 06:01 PM, rustyBSD wrote: > > > Le 25/09/2012 15:57, Sebastian Dransfeld a écrit : > > >> Something like this (untested!!). > > > Hi, > > > I use malloc() because OpenBSD's secure rm > > > uses malloc too. > > > > > > I'm not sure mmap() is good, but I'll read some > > > documentation. > > > > > > In all cases, your patch doesn't work, as > > > eina_file_map_all() give a read access. So > > > we can't write randomized data to the file > > > (PROT_READ). > > > > True, Didn't check that. > > > > I checked the openbsd source, and they limit the size of the malloc > > and do several passes if the whole file size can't be malloc'ed. > > > > And I think mmap is fine: > > http://en.wikipedia.org/wiki/C_dynamic_memory_allocation#OpenBSD.27s_malloc > > and that's what i did. a fixed buffer of 64kb is malloced - and > random filled or 0xff filled as per before - but just written 64k at > a time. and yes - it handles the tail that may not be a full 64k too. > > here's the question... this is pretty lame security-wise. shouldn't > we be military/cia/nsa spec and overwrite it at least 7 times? :) oh > and this will probably/possible get screwed by logging fs's or flash > media that may shuffle the blocks around on write :) ie it wont help. > > anyway... why not do it 7 times and then we can say "not even the cia > can get your warez after this!" :) Borrow code from boot'n'nuke? I've used that when I've had to do secure deletions of hard drives. http://www.dban.org/ -- A big old stinking pile of genius that no one wants coz there are too many silver coated monkeys in the world.
signature.asc
Description: PGP signature
------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://ad.doubleclick.net/clk;258768047;13503038;j? http://info.appdynamics.com/FreeJavaPerformanceDownload.html
_______________________________________________ enlightenment-devel mailing list enlightenment-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/enlightenment-devel
