Re: Unswappable memory needed is user space

Kev (klmitch@mit.edu)
Tue, 08 Dec 1998 18:16:46 EST

> I'm making a crypto program (under french law).
> It crypts a file and then totally erase the uncrypted by filling it with
> zero.
>
> My problem is that if the crypting process is swapped out during
> crypting, one could be able to recover parts of uncrypted file
> in swap partition.
>
> Is there a way to malloc a non swappable part of memory ?

You can use mlock() to lock pages into memory...but only as root.

-- 
Kevin L. Mitchell <klmitch@mit.edu>
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