2015-06-15 0:43 GMT+08:00 Greg KH :
> On Sun, Jun 14, 2015 at 12:49:55PM -0300, Cristian Rodríguez wrote:
>>
>> El jun. 14, 2015 10:21, "cee1" escribió:
>> >
>> > Hi all,
>> >
>> > Why we need to read/save random seed? Can it be read from /dev/random each
>> time?
>>
>> Because the kernel is borke
On Wed, 17.06.15 17:38, Reindl Harald (h.rei...@thelounge.net) wrote:
> * the purpose of systemd-random-seed.service is to seed
> /dev/random realy at boot so that other services like
> sshd, vpn, webservers have a random source
>
> * seed /dev/random *followed* by suck it out again like
>
Am 17.06.2015 um 17:08 schrieb cee1:
2015-06-17 22:03 GMT+08:00 Lennart Poettering :
On Wed, 17.06.15 20:21, cee1 (fykc...@gmail.com) wrote:
What I means is:
1. Load a saved seed to /dev/urandom.
2. The service read /dev/random, which will block until kernel thinks
there's enough entropy - t
On Thu, 18.06.15 00:00, cee1 (fykc...@gmail.com) wrote:
> First it seeds /dev/urandom
> Second, seed /dev/random will not increase the entropy without using
> ioctl (please see
> https://www.mail-archive.com/systemd-devel@lists.freedesktop.org/msg32555.html)
>
> Though, some other services may re
2015-06-17 23:38 GMT+08:00 Reindl Harald :
>
>
> Am 17.06.2015 um 17:08 schrieb cee1:
>>
>> 2015-06-17 22:03 GMT+08:00 Lennart Poettering :
>>>
>>> On Wed, 17.06.15 20:21, cee1 (fykc...@gmail.com) wrote:
What I means is:
1. Load a saved seed to /dev/urandom.
2. The service
B1;4002;0cOn Wed, 17.06.15 23:45, cee1 (fykc...@gmail.com) wrote:
> 2015-06-17 23:15 GMT+08:00 Lennart Poettering :
> >> That don't mean blocking boot, but a service, let's say
> >> systemd-random-seed.service:
> >> 1. systemd-random-seed.service loads a seed from disk to /dev/urandom
> >> 2. syst
2015-06-17 23:15 GMT+08:00 Lennart Poettering :
>> That don't mean blocking boot, but a service, let's say
>> systemd-random-seed.service:
>> 1. systemd-random-seed.service loads a seed from disk to /dev/urandom
>> 2. systemd-random-seed.service tells systemd "I'm ready" (sd_notify())
>> 3. Instead
On Wed, 17.06.15 23:08, cee1 (fykc...@gmail.com) wrote:
> 2015-06-17 22:03 GMT+08:00 Lennart Poettering :
> > On Wed, 17.06.15 20:21, cee1 (fykc...@gmail.com) wrote:
> >>
> >> What I means is:
> >> 1. Load a saved seed to /dev/urandom.
> >> 2. The service read /dev/random, which will block until k
2015-06-17 22:03 GMT+08:00 Lennart Poettering :
> On Wed, 17.06.15 20:21, cee1 (fykc...@gmail.com) wrote:
>>
>> What I means is:
>> 1. Load a saved seed to /dev/urandom.
>> 2. The service read /dev/random, which will block until kernel thinks
>> there's enough entropy - then the Random Number shoul
On Wed, 17.06.15 16:04, Reindl Harald (h.rei...@thelounge.net) wrote:
> >Please keep such comments to yourself or you will be
> >moderated again
>
> you threaten everytime you personally don't agree is a better style?
Congratulations, I just put you back on moderation.
Lennart
--
Lennart Poet
On Wed, 17.06.15 20:21, cee1 (fykc...@gmail.com) wrote:
> 2015-06-17 16:40 GMT+08:00 Reindl Harald :
> >
> > Am 17.06.2015 um 05:06 schrieb cee1:
> >>
> >> 2015-06-16 0:21 GMT+08:00 Lennart Poettering :
> >>>
> >>> On Mon, 15.06.15 23:33, cee1 (fykc...@gmail.com) wrote:
>
> Hi,
>
>
Am 17.06.2015 um 14:51 schrieb Kay Sievers:
On Wed, Jun 17, 2015 at 2:28 PM, Reindl Harald wrote:
Am 17.06.2015 um 14:21 schrieb cee1:
2015-06-17 16:40 GMT+08:00 Reindl Harald :
systemd-random-seed.service will load the "seed on disk" to
/dev/urandom, and save a "seed" to disk when shutdow
On Wed, Jun 17, 2015 at 2:28 PM, Reindl Harald wrote:
>
> Am 17.06.2015 um 14:21 schrieb cee1:
>>
>> 2015-06-17 16:40 GMT+08:00 Reindl Harald :
systemd-random-seed.service will load the "seed on disk" to
/dev/urandom, and save a "seed" to disk when shutdown, right?
The art
Am 17.06.2015 um 14:21 schrieb cee1:
2015-06-17 16:40 GMT+08:00 Reindl Harald :
systemd-random-seed.service will load the "seed on disk" to
/dev/urandom, and save a "seed" to disk when shutdown, right?
The article at http://www.2uo.de/myths-about-urandom/ suggests us
saving the seed as soon as
2015-06-17 16:40 GMT+08:00 Reindl Harald :
>
> Am 17.06.2015 um 05:06 schrieb cee1:
>>
>> 2015-06-16 0:21 GMT+08:00 Lennart Poettering :
>>>
>>> On Mon, 15.06.15 23:33, cee1 (fykc...@gmail.com) wrote:
Hi,
I maybe got confused.
First, systemd-random-seed.service will sa
Am 17.06.2015 um 05:06 schrieb cee1:
2015-06-16 0:21 GMT+08:00 Lennart Poettering :
On Mon, 15.06.15 23:33, cee1 (fykc...@gmail.com) wrote:
Hi,
I maybe got confused.
First, systemd-random-seed.service will save a "seed" from
/dev/urandom when shutdown, and load that "seed" to /dev/urandom wh
2015-06-16 0:21 GMT+08:00 Lennart Poettering :
> On Mon, 15.06.15 23:33, cee1 (fykc...@gmail.com) wrote:
>
>> Hi,
>>
>> I maybe got confused.
>>
>> First, systemd-random-seed.service will save a "seed" from
>> /dev/urandom when shutdown, and load that "seed" to /dev/urandom when
>> next boot up.
>>
On Mon, 15.06.15 23:33, cee1 (fykc...@gmail.com) wrote:
> Hi,
>
> I maybe got confused.
>
> First, systemd-random-seed.service will save a "seed" from
> /dev/urandom when shutdown, and load that "seed" to /dev/urandom when
> next boot up.
>
> My questions are:
> 1. Can we not save a seed, but l
On Mon, Jun 15, 2015 at 12:33 PM, cee1 wrote:
> Hi,
>
> I maybe got confused.
>
> First, systemd-random-seed.service will save a "seed" from
> /dev/urandom when shutdown, and load that "seed" to /dev/urandom when
> next boot up.
>
> My questions are:
> 1. Can we not save a seed, but load a seed th
Hi,
I maybe got confused.
First, systemd-random-seed.service will save a "seed" from
/dev/urandom when shutdown, and load that "seed" to /dev/urandom when
next boot up.
My questions are:
1. Can we not save a seed, but load a seed that is read from **
/dev/random ** to ** /dev/urandom **?
2. Savi
On Jun 14, 2015 10:11 AM, "Cristian Rodríguez" <
cristian.rodrig...@opensuse.org> wrote:
>
> On Sun, Jun 14, 2015 at 1:43 PM, Greg KH
wrote:
> > On Sun, Jun 14, 2015 at 12:49:55PM -0300, Cristian Rodríguez wrote:
>
>
> Las time I checked , it required this userspace help even when the
> machine ha
On Sun, Jun 14, 2015 at 6:45 PM, Greg KH wrote:
> On Sun, Jun 14, 2015 at 02:11:53PM -0300, Cristian Rodríguez wrote:
>> On Sun, Jun 14, 2015 at 1:43 PM, Greg KH wrote:
>> > On Sun, Jun 14, 2015 at 12:49:55PM -0300, Cristian Rodríguez wrote:
>> >>
>> >> El jun. 14, 2015 10:21, "cee1" escribió:
>
On Sun, Jun 14, 2015 at 02:11:53PM -0300, Cristian Rodríguez wrote:
> On Sun, Jun 14, 2015 at 1:43 PM, Greg KH wrote:
> > On Sun, Jun 14, 2015 at 12:49:55PM -0300, Cristian Rodríguez wrote:
> >>
> >> El jun. 14, 2015 10:21, "cee1" escribió:
> >> >
> >> > Hi all,
> >> >
> >> > Why we need to read/
On Sun, 14.06.15 14:11, Cristian Rodríguez (cristian.rodrig...@opensuse.org)
wrote:
> On Sun, Jun 14, 2015 at 1:43 PM, Greg KH wrote:
> > On Sun, Jun 14, 2015 at 12:49:55PM -0300, Cristian Rodríguez wrote:
> >>
> >> El jun. 14, 2015 10:21, "cee1" escribió:
> >> >
> >> > Hi all,
> >> >
> >> > Wh
On Sun, Jun 14, 2015 at 1:43 PM, Greg KH wrote:
> On Sun, Jun 14, 2015 at 12:49:55PM -0300, Cristian Rodríguez wrote:
>>
>> El jun. 14, 2015 10:21, "cee1" escribió:
>> >
>> > Hi all,
>> >
>> > Why we need to read/save random seed? Can it be read from /dev/random each
>> time?
>>
>> Because the ke
On Sun, Jun 14, 2015 at 12:49:55PM -0300, Cristian Rodríguez wrote:
>
> El jun. 14, 2015 10:21, "cee1" escribió:
> >
> > Hi all,
> >
> > Why we need to read/save random seed? Can it be read from /dev/random each
> time?
>
> Because the kernel is borked and still is needs to be fed of entropy at
El jun. 14, 2015 10:21, "cee1" escribió:
>
> Hi all,
>
> Why we need to read/save random seed? Can it be read from /dev/random
each time?
Because the kernel is borked and still is needs to be fed of entropy at
system startup by user space. Please read the random man page.
I agree we shouldn't ha
On Sun, Jun 14, 2015 at 4:21 PM, cee1 wrote:
> Hi all,
>
> Why we need to read/save random seed? Can it be read from /dev/random each
> time?
Well, that would sorta defeat the point.
The random seed isn't for systemd's use. On boot, it is *written to*
/dev/random,
not read from it. Early durin
Hi all,
Why we need to read/save random seed? Can it be read from /dev/random each time?
--
Regards,
- cee1
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