Re: jitterentropy_rng on armv5 embedded target

2020-05-08 Thread Stephan Mueller
Am Freitag, 8. Mai 2020, 14:26:41 CEST schrieb Alexander Dahl: Hi Alexander, > Hello, > > Am Freitag, 8. Mai 2020, 14:22:02 CEST schrieb Stephan Mueller: > > Am Freitag, 8. Mai 2020, 14:17:25 CEST schrieb Alexander Dahl: > > > Okay and DRBG has nothing to do with /dev/random ? > > > > Nope, it

Re: jitterentropy_rng on armv5 embedded target

2020-05-08 Thread Alexander Dahl
Hello, Am Freitag, 8. Mai 2020, 14:22:02 CEST schrieb Stephan Mueller: > Am Freitag, 8. Mai 2020, 14:17:25 CEST schrieb Alexander Dahl: > > Okay and DRBG has nothing to do with /dev/random ? > > Nope, it is used as part of the kernel crypto API and its use cases. > > > Then where do the random >

Re: jitterentropy_rng on armv5 embedded target

2020-05-08 Thread Stephan Mueller
Am Freitag, 8. Mai 2020, 14:17:25 CEST schrieb Alexander Dahl: Hi Alexander, > > > If so, then how is it supposed to be set up? > > > > It is intended for in-kernel purposes (namely to seed its DRBG). > > Okay and DRBG has nothing to do with /dev/random ? Nope, it is used as part of the kernel

Re: jitterentropy_rng on armv5 embedded target

2020-05-08 Thread Alexander Dahl
Hello, Stephan, Am Freitag, 8. Mai 2020, 13:58:14 CEST schrieb Stephan Mueller: > > (Although those daemons would solve my problem, I currently try > > to avoid them, because memory on my platform is very restricted and every > > additional running userspace process costs at least around 1 MB.) >

Re: jitterentropy_rng on armv5 embedded target

2020-05-08 Thread Stephan Mueller
Am Freitag, 8. Mai 2020, 13:40:08 CEST schrieb Alexander Dahl: Hi Alexander, > Hello, > > after upgrading OpenSSL to 1.1.1g on an armv5 based embedded target I had a > deeper look into entropy generation for that device and stumbled over the in > kernel 'jitterentropy_rng' module. > > As far as

jitterentropy_rng on armv5 embedded target

2020-05-08 Thread Alexander Dahl
Hello, after upgrading OpenSSL to 1.1.1g on an armv5 based embedded target I had a deeper look into entropy generation for that device and stumbled over the in kernel 'jitterentropy_rng' module. As far as I understood it's supposed to do the same as the well known 'haveged' or the userspace da