Jivin Jeff Garzik lays it down ... > Evgeniy Polyakov wrote: > >On Thu, 2005-03-24 at 14:27 +1000, David McCullough wrote: > > > >>Hi all, > >> > >>Here is a small patch for 2.6.11 that adds a routine: > >> > >> add_true_randomness(__u32 *buf, int nwords); > >> > >>so that true random number generator device drivers can add a entropy > >>to the system. Drivers that use this can be found in the latest release > >>of ocf-linux, an asynchronous crypto implementation for linux based on > >>the *BSD Cryptographic Framework. > >> > >> http://ocf-linux.sourceforge.net/ > >> > >>Adding this can dramatically improve the performance of /dev/random on > >>small embedded systems which do not generate much entropy. > > > > > >People will not apply any kind of such changes. > >Both OCF and acrypto already handle all RNG cases - no need for any kind > >of userspace daemon or entropy (re)injection mechanism. > >Anyone who want to use HW randomness may use OCF/acrypto mechanism. > >For example here is patch to enable acrypto support for hw_random.c > >It is very simple and support only upto 4 bytes request, of course it > >is > >not interested for anyone, but it is only 2-minutes example: > > If you want to add entropy to the kernel entropy pool from hardware RNG, > you should use the userland daemon, which detects non-random (broken) > hardware and provides throttling, so that RNG data collection does not > consume 100% CPU. > > If you want to use the hardware RNG directly, it's simple: just open > /dev/hw_random. > > Hardware RNG should not go kernel->kernel without adding FIPS tests and > such.
For reference, the RNG on the Safenet I am using this with is FIPS140 certified. I believe the HIFN part is also but I place the doc that says so. Cheers, Davidm -- David McCullough, [EMAIL PROTECTED] Ph:+61 7 34352815 http://www.SnapGear.com Custom Embedded Solutions + Security Fx:+61 7 38913630 http://www.uCdot.org - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
