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16 commits

Author SHA1 Message Date
nicoo 39383a8494 nixos/rngd: Remove module entirely, leave an explaination 
Per @shlevy's request on #96092.
 2021-02-21 01:32:50 +01:00
nicoo e64d3f60fb nixos/modules/security/rngd: Disable by default 
`rngd` seems to be the root cause for slow boot issues, and its functionality is
redundant since kernel v3.17 (2014), which introduced a `krngd` task (in kernel
space) that takes care of pulling in data from hardware RNGs:

> commit be4000bc4644d027c519b6361f5ae3bbfc52c347
> Author: Torsten Duwe <duwe@lst.de>
> Date:   Sat Jun 14 23:46:03 2014 -0400
>
>     hwrng: create filler thread
>
>     This can be viewed as the in-kernel equivalent of hwrngd;
>     like FUSE it is a good thing to have a mechanism in user land,
>     but for some reasons (simplicity, secrecy, integrity, speed)
>     it may be better to have it in kernel space.
>
>     This patch creates a thread once a hwrng registers, and uses
>     the previously established add_hwgenerator_randomness() to feed
>     its data to the input pool as long as needed. A derating factor
>     is used to bias the entropy estimation and to disable this
>     mechanism entirely when set to zero.

Closes: #96067
 2020-09-09 21:51:25 -04:00
worldofpeace fa76150235 nixos/rngd: fix clean shutdown 
It seems disabling DefaultDependencies
removes these implicit dependencies [0] that
we needed for shutdown to happen cleanly.

Fixes #80871

[0]: https://www.freedesktop.org/software/systemd/man/systemd.service.html#Default%20Dependencies
 2020-02-23 18:53:52 -05:00
Daniel Frank d14ba1e1ad
security.rngd: start rngd during early boot to reduce entropy starvation due to encrypted swap and remove PrivateTmp to avoid a circular dependency 2020-02-08 12:29:13 +01:00
Will Dietz e5d049e469 rngd: harden service config, from arch 2019-05-07 22:53:09 -05:00
Will Dietz b809071ffb rngd: add option to run w/debug flag 
Added while testing if adding hardening
directives to the service blocked access
to various sources, might be useful in the future.
 2019-05-06 23:44:38 -05:00
Gabriel Ebner 20078fd5b2 nixos/rngd: do not pass --version flag 2018-11-05 10:41:38 +01:00
Renaud deacd0bd73
nixos/rngd: fix exec flags and udev rules 
TPM1.2 support has been dropped in rng-tools v6.5
see caef8cce97

rngd won't access /dev/tpm0 anymore and the "--no-tpm=1" option is now unrecognised
 2018-10-28 17:31:35 +01:00
Renaud b2f6aa0069
nixos/rngd: use new name pkgs.rng-tools 
Instead of pkgs.rng_tools which is now an alias
 2018-10-24 13:46:08 +02:00
Scott R. Parish a560223119 rngd: update modalias to match cpu type 
It looks like the cpu type part of modalias might have changed, my
systems (4.4.20 and 4.7.2) show something like the following:

```
cpu:type:x86,ven0000fam0006mod003F:feature:,0000,0001,0002,0003,0004,0005,0006,0007,0008,0009,000B,000C,000D,000E,000F,0010,0011,0013,0017,0018,0019,001A,001C,002B,0034,003B,003D,0068,006F,0070,0072,0074,0075,0076,007D,0080,0081,0089,008C,008D,0091,0093,0094,0095,0096,0097,0098,0099,009A,009B,009C,009D,009E,009F,00C0,00C5,0120,0123,0125,0127,0128,0129,012A,0140
```

Update the rngd modalias rule to match this so udev properly has
systemd start rngd.
 2016-09-17 18:36:57 -07:00
Nikolay Amiantov dbc0395b2b nixos/rngd: some fixes 2015-01-06 17:27:07 +03:00
Alexander Kjeldaas baf4faeddc Only disable TPM access by rngd when tcsd is enabled. 2014-04-22 14:05:09 +02:00
Alexander Kjeldaas 64311899db Don't let rngd read /dev/tpm0. 
Only one process can interact with the TPM module and
that process should be tcsd.  The tpm_rng kernel module
should instead be loaded and /dev/hwrnd be used to
read the TPM random generator.
Also, log which random generator devices are used by
rngd on startup.
 2014-04-22 14:05:09 +02:00
Eelco Dolstra 29027fd1e1 Rewrite ‘with pkgs.lib’ -> ‘with lib’ 
Using pkgs.lib on the spine of module evaluation is problematic
because the pkgs argument depends on the result of module
evaluation. To prevent an infinite recursion, pkgs and some of the
modules are evaluated twice, which is inefficient. Using ‘with lib’
prevents this problem.
 2014-04-14 16:26:48 +02:00
Eelco Dolstra 408b8b5725 Add lots of missing option types 2013-10-30 18:47:43 +01:00
Eelco Dolstra 5c1f8cbc70 Move all of NixOS to nixos/ in preparation of the repository merge 2013-10-10 13:28:20 +02:00
Renamed from modules/security/rngd.nix (Browse further)