Let's switch from the low-level SHA256 APIs to EVP APIs. The former are
deprecated on OpenSSL 3.0, the latter are supported both by old
OpenSSL and by OpenSSL 3.0, hence are the better choice.
Fixes: #20775
It's not "const", it can change any time if people change the fs, and we
don#t send out notifications for it. Hence don't claim it was const.
(Otherwise clients might cache it, but they should not)
Prompted-by: #20792
According to the various man pages of "resolvconf" the -u switch is for:
"-u Just run the update scripts (if updating is enabled)."
"-u Force resolvconf to update all its subscribers. resolvconf does not
update the subscribers when adding a resolv.conf that matches what
it already has for that interface."
We have no "subscribers", we ourselves are the only "subscriber" we
support. Hence it's probably better to ignore such a request and make it
a NOP, then to fail.
Fixes: #20748
Currently `systemd-sysctl` binary is used in `systemd-sysctl.service`
which is mostly configured as `oneshot`. There are situations where one
would like to use systemd to maintain Sysctl configurations on a host,
using a configuration managers such as Chef or Puppet, by apply
configurations every X duration.
The problem with using `systemd-sysctl` is that it writes all the Sysctl
settings, even if the values for those settings have not changed. From
experience, we have observed that some Sysctl settings cause actions in
the kernel upon writing(like dropping caches) which in turn cause
undesired side effects.
This patch tries to minimize such side effects by comparing values
before writing.
Also,
- drop unnecessary +1 from buffer size, as IF_NAMESIZE or IFNAMSIZ
includes the nul at the end.
- format_ifname() does not update buffer on failure,
- introduces format_ifname_alloc(), FORMAT_IFNAME(), and their friends.
Getting certificates for dm-verity roothash signing into the trusted
kernel keychain is a royal PITA (means recompiling or rebooting with
shim), hence let's add a minimal userspace PKCS7 validation as well.
The mechanism is really simple and compatible with the verification the
kernel does. The only difference is that the certificates are searched
in /etc/verity.d/*.crt (and similar dirs in /usr/lib/, …).
We'll first try validation by passing the PKCS#7 data to the kernel, but
if that doesn't work we'll see if one of the certificates found that way
works and then attempt to attach the image without passing the PKCS#7
data to the kernel.
This makes it very easy to have fully validated GPT disk images. For
example, just copy the 'mkosi.secure-boot.crt' file you have in your
mkosi build dir to /etc/verity.d/ and things should just work.
The field is not owned by us (even though is in our JSON objects) but by
the LUKS2 spec. Hence let's handle this a bit more gracefully: let's not
get confused by it, just warn and skip over it.
Fixes: #20847
Lennart Poettering
Anita Zhang
Yu Watanabe
Luca Boccassi
Antony Deepak Thomas
Frantisek Sumsal
Hans de Goede
Albert Brox
Daan De Meyer