Re: [PATCH v5 0/7] /dev/random - a new approach

Am Dienstag, 21. Juni 2016, 14:22:48 schrieb Austin S. Hemmelgarn: Hi Austin, > On 2016-06-21 12:28, Stephan Mueller wrote: > > Am Dienstag, 21. Juni 2016, 12:03:56 schrieb Austin S. Hemmelgarn: > > > > Hi Austin, > > > >> On 2016-06-21 03:32, Stephan Mueller wrote: > >>> Am Dienstag, 21. Juni

Re: [PATCH v5 0/7] /dev/random - a new approach

Am Dienstag, 21. Juni 2016, 14:22:48 schrieb Austin S. Hemmelgarn: Hi Austin, > On 2016-06-21 12:28, Stephan Mueller wrote: > > Am Dienstag, 21. Juni 2016, 12:03:56 schrieb Austin S. Hemmelgarn: > > > > Hi Austin, > > > >> On 2016-06-21 03:32, Stephan Mueller wrote: > >>> Am Dienstag, 21. Juni

Re: [PATCH v5 0/7] /dev/random - a new approach

On 2016-06-21 12:28, Stephan Mueller wrote: Am Dienstag, 21. Juni 2016, 12:03:56 schrieb Austin S. Hemmelgarn: Hi Austin, On 2016-06-21 03:32, Stephan Mueller wrote: Am Dienstag, 21. Juni 2016, 09:12:07 schrieb Nikos Mavrogiannopoulos: Hi Nikos, On Mon, Jun 20, 2016 at 5:43 PM, Stephan

Re: [PATCH v5 0/7] /dev/random - a new approach

On 2016-06-21 12:28, Stephan Mueller wrote: Am Dienstag, 21. Juni 2016, 12:03:56 schrieb Austin S. Hemmelgarn: Hi Austin, On 2016-06-21 03:32, Stephan Mueller wrote: Am Dienstag, 21. Juni 2016, 09:12:07 schrieb Nikos Mavrogiannopoulos: Hi Nikos, On Mon, Jun 20, 2016 at 5:43 PM, Stephan

Re: [PATCH v5 0/7] /dev/random - a new approach

On 2016-06-21 03:32, Stephan Mueller wrote: Am Dienstag, 21. Juni 2016, 09:12:07 schrieb Nikos Mavrogiannopoulos: Hi Nikos, On Mon, Jun 20, 2016 at 5:43 PM, Stephan Mueller wrote: Personally, I don't really use /dev/random, nor would I recommend it for most application

Re: [PATCH v5 0/7] /dev/random - a new approach

Am Dienstag, 21. Juni 2016, 12:03:56 schrieb Austin S. Hemmelgarn: Hi Austin, > On 2016-06-21 03:32, Stephan Mueller wrote: > > Am Dienstag, 21. Juni 2016, 09:12:07 schrieb Nikos Mavrogiannopoulos: > > > > Hi Nikos, > > > >> On Mon, Jun 20, 2016 at 5:43 PM, Stephan Mueller

Re: [PATCH v5 0/7] /dev/random - a new approach

On 2016-06-21 03:32, Stephan Mueller wrote: Am Dienstag, 21. Juni 2016, 09:12:07 schrieb Nikos Mavrogiannopoulos: Hi Nikos, On Mon, Jun 20, 2016 at 5:43 PM, Stephan Mueller wrote: Personally, I don't really use /dev/random, nor would I recommend it for most application programmers. At

Re: [PATCH v5 0/7] /dev/random - a new approach

Am Dienstag, 21. Juni 2016, 12:03:56 schrieb Austin S. Hemmelgarn: Hi Austin, > On 2016-06-21 03:32, Stephan Mueller wrote: > > Am Dienstag, 21. Juni 2016, 09:12:07 schrieb Nikos Mavrogiannopoulos: > > > > Hi Nikos, > > > >> On Mon, Jun 20, 2016 at 5:43 PM, Stephan Mueller > > > > wrote: >

Re: [PATCH v5 0/7] /dev/random - a new approach

Am Dienstag, 21. Juni 2016, 09:12:07 schrieb Nikos Mavrogiannopoulos: Hi Nikos, > On Mon, Jun 20, 2016 at 5:43 PM, Stephan Mueller wrote: > >> Personally, I don't really use /dev/random, nor would I recommend it > >> for most application programmers. At this point,

Re: [PATCH v5 0/7] /dev/random - a new approach

Am Dienstag, 21. Juni 2016, 09:12:07 schrieb Nikos Mavrogiannopoulos: Hi Nikos, > On Mon, Jun 20, 2016 at 5:43 PM, Stephan Mueller wrote: > >> Personally, I don't really use /dev/random, nor would I recommend it > >> for most application programmers. At this point, getrandom(2) really > >> is

Re: [PATCH v5 0/7] /dev/random - a new approach

On Mon, Jun 20, 2016 at 5:43 PM, Stephan Mueller wrote: >> Personally, I don't really use /dev/random, nor would I recommend it >> for most application programmers. At this point, getrandom(2) really >> is the preferred interface unless you have some very specialized >>

Re: [PATCH v5 0/7] /dev/random - a new approach

On Mon, Jun 20, 2016 at 5:43 PM, Stephan Mueller wrote: >> Personally, I don't really use /dev/random, nor would I recommend it >> for most application programmers. At this point, getrandom(2) really >> is the preferred interface unless you have some very specialized >> needs. > I fully agree.

Re: [PATCH v5 0/7] /dev/random - a new approach

Am Dienstag, 21. Juni 2016, 01:12:55 schrieb Theodore Ts'o: Hi Theodore, > On Mon, Jun 20, 2016 at 09:00:49PM +0200, Stephan Mueller wrote: > > The time stamp maintenance is the exact cause for the correlation: one HID > > event triggers: > > > > - add_interrupt_randomness which takes high-res

Re: [PATCH v5 0/7] /dev/random - a new approach

Am Dienstag, 21. Juni 2016, 01:12:55 schrieb Theodore Ts'o: Hi Theodore, > On Mon, Jun 20, 2016 at 09:00:49PM +0200, Stephan Mueller wrote: > > The time stamp maintenance is the exact cause for the correlation: one HID > > event triggers: > > > > - add_interrupt_randomness which takes high-res

Re: [PATCH v5 0/7] /dev/random - a new approach

On Mon, Jun 20, 2016 at 09:00:49PM +0200, Stephan Mueller wrote: > > The time stamp maintenance is the exact cause for the correlation: one HID > event triggers: > > - add_interrupt_randomness which takes high-res time stamp, Jiffies and some > pointers > > - add_input_randomness which takes

Re: [PATCH v5 0/7] /dev/random - a new approach

On Mon, Jun 20, 2016 at 09:00:49PM +0200, Stephan Mueller wrote: > > The time stamp maintenance is the exact cause for the correlation: one HID > event triggers: > > - add_interrupt_randomness which takes high-res time stamp, Jiffies and some > pointers > > - add_input_randomness which takes

Re: [PATCH v5 0/7] /dev/random - a new approach

> With that being said, wouldn't it make sense to: > > - Get rid of the entropy heuristic entirely and just assume a fixed value of > entropy for a given event? What does that gain you? You can always impose an upper bound, but *some* evidence that it's not a metronome is nice to have. > -

Re: [PATCH v5 0/7] /dev/random - a new approach

> With that being said, wouldn't it make sense to: > > - Get rid of the entropy heuristic entirely and just assume a fixed value of > entropy for a given event? What does that gain you? You can always impose an upper bound, but *some* evidence that it's not a metronome is nice to have. > -

Re: [PATCH v5 0/7] /dev/random - a new approach

Am Montag, 20. Juni 2016, 14:44:03 schrieb George Spelvin: Hi George, > > With that being said, wouldn't it make sense to: > > > > - Get rid of the entropy heuristic entirely and just assume a fixed value > > of entropy for a given event? > > What does that gain you? You can always impose an

Re: [PATCH v5 0/7] /dev/random - a new approach

Am Montag, 20. Juni 2016, 14:44:03 schrieb George Spelvin: Hi George, > > With that being said, wouldn't it make sense to: > > > > - Get rid of the entropy heuristic entirely and just assume a fixed value > > of entropy for a given event? > > What does that gain you? You can always impose an

Re: [PATCH v5 0/7] /dev/random - a new approach

Am Montag, 20. Juni 2016, 11:28:38 schrieb Theodore Ts'o: Hi Theodore, > On Mon, Jun 20, 2016 at 07:51:59AM +0200, Stephan Mueller wrote: > > - Correlation of noise sources: as outlined in [1] chapter 1, the three > > noise sources of the legacy /dev/random implementation have a high > >

Re: [PATCH v5 0/7] /dev/random - a new approach

Am Montag, 20. Juni 2016, 11:28:38 schrieb Theodore Ts'o: Hi Theodore, > On Mon, Jun 20, 2016 at 07:51:59AM +0200, Stephan Mueller wrote: > > - Correlation of noise sources: as outlined in [1] chapter 1, the three > > noise sources of the legacy /dev/random implementation have a high > >

Re: [PATCH v5 0/7] /dev/random - a new approach

On Mon, Jun 20, 2016 at 07:51:59AM +0200, Stephan Mueller wrote: > > - Correlation of noise sources: as outlined in [1] chapter 1, the three noise > sources of the legacy /dev/random implementation have a high correlation. > Such > correlation is due to the fact that a HID/disk event at the

Re: [PATCH v5 0/7] /dev/random - a new approach

On Mon, Jun 20, 2016 at 07:51:59AM +0200, Stephan Mueller wrote: > > - Correlation of noise sources: as outlined in [1] chapter 1, the three noise > sources of the legacy /dev/random implementation have a high correlation. > Such > correlation is due to the fact that a HID/disk event at the

Re: [PATCH v5 0/7] /dev/random - a new approach

Hi! > > On Sun 2016-06-19 17:58:41, Stephan Mueller wrote: > > > Hi Herbert, Ted, > > > > > > The following patch set provides a different approach to /dev/random which > > > I call Linux Random Number Generator (LRNG) to collect entropy within the > > > Linux kernel. The main improvements

Re: [PATCH v5 0/7] /dev/random - a new approach

Hi! > > On Sun 2016-06-19 17:58:41, Stephan Mueller wrote: > > > Hi Herbert, Ted, > > > > > > The following patch set provides a different approach to /dev/random which > > > I call Linux Random Number Generator (LRNG) to collect entropy within the > > > Linux kernel. The main improvements

Re: [PATCH v5 0/7] /dev/random - a new approach

Am Sonntag, 19. Juni 2016, 21:36:14 schrieb Pavel Machek: Hi Pavel, > On Sun 2016-06-19 17:58:41, Stephan Mueller wrote: > > Hi Herbert, Ted, > > > > The following patch set provides a different approach to /dev/random which > > I call Linux Random Number Generator (LRNG) to collect entropy

Re: [PATCH v5 0/7] /dev/random - a new approach

Am Sonntag, 19. Juni 2016, 21:36:14 schrieb Pavel Machek: Hi Pavel, > On Sun 2016-06-19 17:58:41, Stephan Mueller wrote: > > Hi Herbert, Ted, > > > > The following patch set provides a different approach to /dev/random which > > I call Linux Random Number Generator (LRNG) to collect entropy

Re: [PATCH v5 0/7] /dev/random - a new approach

On Sun, Jun 19, 2016 at 3:36 PM, Pavel Machek wrote: >> The following patch set provides a different approach to /dev/random ... > > Dunno. It is very similar to existing rng, AFAICT. I do not think so. A lot of the basic principles are the same of course, but Stephan is

Re: [PATCH v5 0/7] /dev/random - a new approach

On Sun, Jun 19, 2016 at 3:36 PM, Pavel Machek wrote: >> The following patch set provides a different approach to /dev/random ... > > Dunno. It is very similar to existing rng, AFAICT. I do not think so. A lot of the basic principles are the same of course, but Stephan is suggesting some real

Re: [PATCH v5 0/7] /dev/random - a new approach

On Sun 2016-06-19 17:58:41, Stephan Mueller wrote: > Hi Herbert, Ted, > > The following patch set provides a different approach to /dev/random which > I call Linux Random Number Generator (LRNG) to collect entropy within the > Linux > kernel. The main improvements compared to the legacy

Re: [PATCH v5 0/7] /dev/random - a new approach

On Sun 2016-06-19 17:58:41, Stephan Mueller wrote: > Hi Herbert, Ted, > > The following patch set provides a different approach to /dev/random which > I call Linux Random Number Generator (LRNG) to collect entropy within the > Linux > kernel. The main improvements compared to the legacy

[PATCH v5 0/7] /dev/random - a new approach

Hi Herbert, Ted, The following patch set provides a different approach to /dev/random which I call Linux Random Number Generator (LRNG) to collect entropy within the Linux kernel. The main improvements compared to the legacy /dev/random is to provide sufficient entropy during boot time as well as

[PATCH v5 0/7] /dev/random - a new approach

Hi Herbert, Ted, The following patch set provides a different approach to /dev/random which I call Linux Random Number Generator (LRNG) to collect entropy within the Linux kernel. The main improvements compared to the legacy /dev/random is to provide sufficient entropy during boot time as well as