pam-ussh allows authorizing using an SSH certificate stored in your
SSH agent, in a similar manner to pam-ssh-agent-auth, but for
certificates rather than raw public keys.
In issue #157787 @martined wrote:
Trying to use confinement on packages providing their systemd units
with systemd.packages, for example mpd, fails with the following
error:
system-units> ln: failed to create symbolic link
'/nix/store/...-system-units/mpd.service': File exists
This is because systemd-confinement and mpd both provide a mpd.service
file through systemd.packages. (mpd got updated that way recently to
use upstream's service file)
To address this, we now place the unit file containing the bind-mounted
paths of the Nix closure into a drop-in directory instead of using the
name of a unit file directly.
This does come with the implication that the options set in the drop-in
directory won't apply if the main unit file is missing. In practice
however this should not happen for two reasons:
* The systemd-confinement module already sets additional options via
systemd.services and thus we should get a main unit file
* In the unlikely event that we don't get a main unit file regardless
of the previous point, the unit would be a no-op even if the options
of the drop-in directory would apply
Another thing to consider is the order in which those options are
merged, since systemd loads the files from the drop-in directory in
alphabetical order. So given that we have confinement.conf and
overrides.conf, the confinement options are loaded before the NixOS
overrides.
Since we're only setting the BindReadOnlyPaths option, the order isn't
that important since all those paths are merged anyway and we still
don't lose the ability to reset the option since overrides.conf comes
afterwards.
Fixes: https://github.com/NixOS/nixpkgs/issues/157787
Signed-off-by: aszlig <aszlig@nix.build>
C's assert macro only works when NDEBUG is undefined. Previously
NDEBUG was undefined incorrectly which meant that the assert
macros in wrapper.c did not work.
The `nix.*` options, apart from options for setting up the
daemon itself, currently provide a lot of setting mappings
for the Nix daemon configuration. The scope of the mapping yields
convience, but the line where an option is considered essential
is blurry. For instance, the `extra-sandbox-paths` mapping is
provided without its primary consumer, and the corresponding
`sandbox-paths` option is also not mapped.
The current system increases the maintenance burden as maintainers have to
closely follow upstream changes. In this case, there are two state versions
of Nix which have to be maintained collectively, with different options
avaliable.
This commit aims to following the standard outlined in RFC 42[1] to
implement a structural setting pattern. The Nix configuration is encoded
at its core as key-value pairs which maps nicely to attribute sets, making
it feasible to express in the Nix language itself. Some existing options are
kept such as `buildMachines` and `registry` which present a simplified interface
to managing the respective settings. The interface is exposed as `nix.settings`.
Legacy configurations are mapped to their corresponding options under `nix.settings`
for backwards compatibility.
Various options settings in other nixos modules and relevant tests have been
updated to use structural setting for consistency.
The generation and validation of the configration file has been modified to
use `writeTextFile` instead of `runCommand` for clarity. Note that validation
is now mandatory as strict checking of options has been pushed down to the
derivation level due to freeformType consuming unmatched options. Furthermore,
validation can not occur when cross-compiling due to current limitations.
A new option `publicHostKey` was added to the `buildMachines`
submodule corresponding to the base64 encoded public host key settings
exposed in the builder syntax. The build machine generation was subsequently
rewritten to use `concatStringsSep` for better performance by grouping
concatenations.
[1] - https://github.com/NixOS/rfcs/blob/master/rfcs/0042-config-option.md
SUID wrappers really shouldn't be enabled by default, unless a consumer
relies on them. So in my opinion this falls upon the desktop
environments if needed or a user to explicltly enable this if wanted.
Most desktop environments and services like CUPS already enable polkit
by default, that should really be sufficient.
When running e.g. `aa-genprof` get error:
> ERROR: Syntax Error: Unknown line found in file /etc/apparmor.d/abstractions/pam line 26:
> r /nix/store/XXXXX.pam,mr /nix/store/XXXXX-linux-pam-1.5.1/lib/security/pam_filter/*,
So add an explicit newline as concatMapStringsSep only adds them
between.
In the process I also found that the CapabilityBoundingSet
was restricting the service from listening on port 80, and
the AmbientCapabilities was ineffective. Fixed appropriately.
- Added defaultText for all inheritable options.
- Add docs on using new defaults option to configure
DNS validation for all domains.
- Update DNS docs to show using a service to configure
rfc2136 instead of manual steps.
Allows configuring many default settings for certificates,
all of which can still be overridden on a per-cert basis.
Some options have been moved into .defaults from security.acme,
namely email, server, validMinDays and renewInterval. These
changes will not break existing configurations thanks to
mkChangedOptionModule.
With this, it is also now possible to configure DNS-01 with
web servers whose virtualHosts utilise enableACME. The only
requirement is you set `acmeRoot = null` for each vhost.
The test suite has been revamped to cover these additions
and also to generally make it easier to maintain. Test config
for apache and nginx has been fully standardised, and it
is now much easier to add a new web server if it follows
the same configuration patterns as those two. I have also
optimised the use of switch-to-configuration which should
speed up testing.
Closes#129838
It is possible for the CA to revoke a cert that has not yet
expired. We must run lego to validate this before expiration,
but we must still ignore failures on unexpired certs to retain
compatibility with #85794
Also changed domainHash logic such that a renewal will only
be attempted at all if domains are unchanged, and do a full
run otherwises. Resolves#147540 but will be partially
reverted when go-acme/lego#1532 is resolved + available.
ClosesNixOS/nixpkgs#108237
When a user first adds an ACME cert to their configuration,
it's likely to fail to renew due to DNS misconfig. This is
non-fatal for other services since selfsigned certs are
(usually) put in place to let dependant services start.
Tell the user about this in the logs, and exit 2 for
differentiation purposes.
selfsignedDeps is already appended to the after and wants
of a cert's renewal service, making these redundant.
You can see this if you run the following command:
systemctl list-dependencies --all --reverse acme-selfsigned-mydomain.com.service
This is horrible if you want to debug failures that happened during
system switches but your 30-ish acme clients spam the log with the same
messages over and over again.
ClosesNixOS/nixpkgs#147348
I was able to reproduce this intermittently in the
test suite during the tests for HTTPd. Adding
StartLimitIntervalSec=0 to disable rate limiting
for these services works fine. I added it anywhere
there was a ConditionPathExists.
This should mirror the behavior we implement for sudo: The TERMINFO and
TERMINFO_DIRS variables are inherited from the normal user's
environment, so terminfo files installed in the user's profile can be
found by ncurses applications running as root.
pam_mkhomedir should create homedirs with the same umask as the rest
of the system. Currently it creates homedirs with go+rx which makes
it readable for other non-privileged users.
nixos-rebuild test causes pam_mount to prompt for a password when running with
an encrypted home:
building '/nix/store/p6bflh7n5zy2dql8l45mix9qnzq65hbk-nixos-system-mildred-18.09.git.98592c5da79M.drv'...
activating the configuration...
setting up /etc...
reenter password for pam_mount:
(mount.c:68): Messages from underlying mount program:
(mount.c:72): crypt_activate_by_passphrase: File exists
(pam_mount.c:522): mount of /dev/mapper/vg0-lv_home_peter failed
kbuildsycoca5 running...
This change makes pam_mount not prompt. It still tries to remount (and fails in
the process) but that message can be ignored.
Fixes: #44586
The cacert package can now generate p11-kit-compatible output itself,
as well as generating the correct set of outputs for fully-joined
and unbundled "traditional" outputs (in standard PEM and
OpenSSL-compatible formats).
Since 7a10478ea7, all /var except
/var/lib/acme gets mounted in a read-only fashion. This behavior
breaks the existing acme deployments having a webroot set outside of
/var/lib/acme.
Collecting the webroots and adding them to the paths read/write
mounted to the systemd service runtime tree.
Fixes#139310
Moving the service before multi-user.target (so the `hardened` test
continue to work the way it did before) can result in locking the kernel
too early. It's better to lock it a bit later and changing the test to
wait specifically for the disable-kernel-module-loading.service.
Add a shell script that checks if the paths of all wrapped programs
actually exist to catch mistakes. This only checks for Nix store paths,
which are always expected to exist at build time.
To keep backward compatibility and have a typing would require making
all options null by default, adding a defaultText containing the actual
value, write the default value logic based on `!= null` and replacing
the nulls laters. This pretty much defeats the point of having used
a submodule type.
The security.wrappers option is morally a set of submodules but it's
actually (un)typed as a generic attribute set. This is bad for several
reasons:
1. Some of the "submodule" option are not document;
2. the default values are not documented and are chosen based on
somewhat bizarre rules (issue #23217);
3. It's not possible to override an existing wrapper due to the
dumb types.attrs.merge strategy;
4. It's easy to make mistakes that will go unnoticed, which is
really bad given the sensitivity of this module (issue #47839).
This makes the option a proper set of submodule and add strict types and
descriptions to every sub-option. Considering it's not yet clear if the
way the default values are picked is intended, this reproduces the current
behavior, but it's now documented explicitly.
bind mounting directories into the nix-store breaks nix commands.
In particular it introduces character devices that are not supported
by nix-store as valid files in the nix store. Use `/var/empty` instead
which is designated for these kind of use cases. We won't create any
files beause of the tmpfs mounted.
Currently, we hardcode the use of --http.webroot, even if no webroot is
configured. This has the effect of disabling the built-in server.
Co-authored-by: Chris Forno <jekor@jekor.com>
Reusing the same private/public key on renewal has two issues:
- some providers don't accept to sign the same public key
again (Buypass Go SSL)
- keeping the same private key forever partly defeats the purpose of
renewing the certificate often
Therefore, let's remove this option. People wanting to keep the same
key can set extraLegoRenewFlags to `[ --reuse-key ]` to keep the
previous behavior. Alternatively, we could put this as an option whose
default value is true.
According to the ABNF grammar for PEM files described in [RFC
7468][1], an eol character (i.e. a newline) is not mandatory after the
posteb line (i.e. "-----END CERTIFICATE-----" in the case of
certificates).
This commit makes our CA certificate bundler expression account for
the possibility that files in config.security.pki.certificateFiles
might not have final newlines, by using `awk` instead of `cat` to
concatenate them. (`awk` prints a final newline from each input file
even if the file doesn't end with a newline.)
[1]: https://datatracker.ietf.org/doc/html/rfc7468#section-3
As per #121293, I ensured the UMask is set correctly
and removed any unnecessary chmod/chown/chgrp commands.
The test suite already partially covered permissions
checking but I added an extra check for the selfsigned
cert permissions.
Currently if fprintd is enabled, pam will ask for fingerprint
regardless of other configured authentication modules (e.g. yubikey).
This change make fingerprint the last resort of authentication before asking for password.
