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This PR allows an option for systemd exec units to enable UTS namespaces
but not restrict changing hostname via seccomp. Thus, units can change
hostname without affecting the host. This is useful for OS-like
containers running as units where they should have freedom to change
their container hostname if they want, but not the host's hostname.
Fixes: #30348
RestrictNamespaces= would accept "time" but would not actually apply
seccomp filters e.g. systemd-run -p RestrictNamespaces=time unshare -T true
should fail but it succeeded.
This commit actually enables time namespace seccomp filtering.
We'd silently skip devices which don't have the feature in the list.
This looked wrong esp. if no devices were suitable. Instead, list them
and show which ones are usable.
$ build/systemd-cryptenroll --fido2-device=list
PATH MANUFACTURER PRODUCT HMAC SECRET
/dev/hidraw7 Yubico YubiKey OTP+FIDO+CCID ✓
/dev/hidraw10 Yubico Security Key by Yubico ✗
/dev/hidraw5 Yubico Security Key by Yubico ✗
/dev/hidraw9 Yubico Yubikey 4 OTP+U2F+CCID ✗
This allows an option for systemd exec units to enable UTS namespaces
but not restrict changing hostname via seccomp. Thus, units can change
hostname without affecting the host.
Fixes: #30348
Migrating ProtectHostname to enum will set the stage for adding more
properties like ProtectHostname=private in future commits.
In addition, we add PrivateHostnameEx property to dbus API which uses
string instead of boolean.
Some ambiguity (e.g., same-named man pages in multiple volumes)
makes it impossible to fully automate this, but the following
Python snippet (run inside the man/ directory of the systemd repo)
helped to generate the sed command lines (which were subsequently
manually reviewed, run and the false positives reverted):
from pathlib import Path
import lxml
from lxml import etree as ET
man2vol: dict[str, str] = {}
man2citerefs: dict[str, list] = {}
for file in Path(".").glob("*.xml"):
tree = ET.parse(file, lxml.etree.XMLParser(recover=True))
meta = tree.find("refmeta")
if meta is not None:
title = meta.findtext("refentrytitle")
if title is not None:
vol = meta.findtext("manvolnum")
if vol is not None:
man2vol[title] = vol
citerefs = list(tree.iter("citerefentry"))
if citerefs:
man2citerefs[title] = citerefs
for man, refs in man2citerefs.items():
for ref in refs:
title = ref.findtext("refentrytitle")
if title is not None:
has = ref.findtext("manvolnum")
try:
should_have = man2vol[title]
except KeyError: # Non-systemd man page reference? Ignore.
continue
if has != should_have:
print(
f"sed -i '\\|<citerefentry><refentrytitle>{title}"
f"</refentrytitle><manvolnum>{has}</manvolnum>"
f"</citerefentry>|s|<manvolnum>{has}</manvolnum>|"
f"<manvolnum>{should_have}</manvolnum>|' {man}.xml"
)
Let's gather generic key/certificate operations in a new tool
systemd-keyutil instead of spreading them across various special purpose
tools.
Fixes#35087
Let's gather generic key/certificate operations in a new tool
systemd-keyutil instead of spreading them across various special
purpose tools.
Fixes#35087
In the troff output, this doesn't seem to make any difference. But in the
html output, the whitespace is sometimes preserved, creating an additional
gap before the following content. Drop it everywhere to avoid this.
This verb writes a public key to stdout extracted from either a public key
path, from a certificate (path or provider) or from a private key (path,
engine, provider). We'll use this in ukify to get rid of the use of the
python cryptography module to convert a private key or certificate to a
public key.
This allows loading the X.509 certificate from an OpenSSL provider
instead of a file system path. This allows loading certficates directly
from hardware tokens instead of having to export them to a file on
disk first.
Currently in mkosi and ukify we use sbsigntools to do secure boot
signing. This has multiple issues:
- sbsigntools is practically unmaintained, sbvarsign is completely
broken with the latest gnu-efi when built without -fshort-wchar and
upstream has completely ignored my bug report about this.
- sbsigntools only supports openssl engines and not the new providers
API.
- sbsigntools doesn't allow us to cache hardware token pins in the
kernel keyring like we do nowadays when we sign stuff ourselves in
systemd-repart or systemd-measure
There are alternative tools like sbctl and pesign but these do not
support caching hardware token pins in the kernel keyring either.
To get around the issues with sbsigntools, let's introduce our own
tool systemd-sbsign to do secure boot signing. This allows us to
take advantage of our own openssl infra so that hardware token pins
are cached in the kernel keyring as expected and we get openssl
provider support as well.
We used both, in fact "Devicetree" was more common. But we have a general rule
that we capitalize all words in names and also we have a DeviceTree=
configuration setting, which we cannot change. If we use two different
spelllings, this will make it harder for people to use the correct one in
config files. So use the "DeviceTree" spelling everywhere.
The text added for .dtbauto/.hwids was very hard to grok. This rewords it to be
proper English. No semantic changes are intended.
When updating this, I noticed that the interaction of multi-profile UKIs and
dtb autoselection is very unclear, a FIXME is added.
