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Groups > linux.kernel > #1508022
| From | Jean-Francois Moine <moinejf@free.fr> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH] nvmem: sunxi-sid: SID content is not a valid source of randomness |
| Date | 2016-10-25 09:20 +0200 |
| Message-ID | <sw4bE-2p1-13@gated-at.bofh.it> (permalink) |
| References | <sv506-48d-5@gated-at.bofh.it> <svTSW-43c-5@gated-at.bofh.it> <sw2Mx-1nM-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Tue, 25 Oct 2016 07:38:55 +0200 LABBE Corentin <clabbe.montjoie@gmail.com> wrote: > > On Sat, Oct 22, 2016 at 03:53:28PM +0200, Corentin Labbe wrote: > > > Since SID's content is constant over reboot, > > > > That's not true, at least not across all the Allwinner SoCs, and > > especially not on the A10 and A20 that this driver supports. > > > > On my cubieboard2 (A20) > hexdump -C /sys/devices/platform/soc\@01c00000/1c23800.eeprom/sunxi-sid0/nvmem > 00000000 16 51 66 83 80 48 50 72 56 54 48 48 03 c2 75 72 |.Qf..HPrVTHH..ur| > 00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| > * > 00000100 16 51 66 83 80 48 50 72 56 54 48 48 03 c2 75 72 |.Qf..HPrVTHH..ur| > 00000110 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| > * > 00000200 > cubiedev ~ # reboot > cubiedev ~ # hexdump -C /sys/devices/platform/soc\@01c00000/1c23800.eeprom/sunxi-sid0/nvmem > 00000000 16 51 66 83 80 48 50 72 56 54 48 48 03 c2 75 72 |.Qf..HPrVTHH..ur| > 00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| > * > 00000100 16 51 66 83 80 48 50 72 56 54 48 48 03 c2 75 72 |.Qf..HPrVTHH..ur| > 00000110 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| > * > 00000200 > > So clearly for me its constant. Even after power off/power on? -- Ken ar c'hentañ | ** Breizh ha Linux atav! ** Jef | http://moinejf.free.fr/
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[PATCH] nvmem: sunxi-sid: SID content is not a valid source of randomness Corentin Labbe <clabbe.montjoie@gmail.com> - 2016-10-22 16:00 +0200
Re: [PATCH] nvmem: sunxi-sid: SID content is not a valid source of randomness Maxime Ripard <maxime.ripard@free-electrons.com> - 2016-10-24 22:20 +0200
Re: [PATCH] nvmem: sunxi-sid: SID content is not a valid source of randomness LABBE Corentin <clabbe.montjoie@gmail.com> - 2016-10-25 07:50 +0200
Re: [PATCH] nvmem: sunxi-sid: SID content is not a valid source of randomness Jean-Francois Moine <moinejf@free.fr> - 2016-10-25 09:20 +0200
Re: [PATCH] nvmem: sunxi-sid: SID content is not a valid source of randomness Maxime Ripard <maxime.ripard@free-electrons.com> - 2016-10-27 00:20 +0200
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