Trying to steer NixOS users away from reporting bugs to the upstream,
when they don't have the capacity to support bugs that could be the
result of our downstreaming setup.
this adds support for software defined radio (SDR) devices by SDRplay.
SDRplay provides an unfree binary library and api-service as well
as a MIT licensed adapter library for SoapySDR for integration
with many popular SDR applications.
Enforce UMask on the systemd unit to restrict the permissions of files
created. Especially the homeserver signing key should not be world
readable, and media is served through synapse itself, so no other user
needs access to these files.
Use a prestart chmod to fixup the permissions on the signing key.
In newer versions of Nix (at least on 2.4pre20201102_550e11f) the
`extra-` prefix for config options received a special meaning and the
option `extra-sandbox-paths` isn't recognized anymore. This commit fixes
it.
It doesn't cause a behavior change when using older versions of Nix but
does cause an extra newline to appear in the config, thus changing the
hash.
Using `replace-literal` to insert secrets leaks the secrets through
the `replace-literal` process' `/proc/<pid>/cmdline`
file. `replace-secret` solves this by reading the secret straight from
the file instead, which also simplifies the code a bit.
ssm-agent expects files in /etc/amazon/ssm. The pkg substitutes a location in
the nix store for those default files, but if we ever want to adjust this
configuration on NixOS, we'd need the ability to modify that file.
This change to the nixos module writes copies of the default files from the nix
store to /etc/amazon/ssm. Future versions can add config, but right now this
would allow users to at least write out a text value to
environment.etc."amazon/ssm/amazon-ssm-agent.json".text to provide
their own config.
Since v2021.5.0 home-assistant uses the ifaddr library in the zeroconf
component to enumerate network interfaces via netlink. Since discovery
is all over the place lets allow AF_NETLINK unconditionally.
It also relies on pyroute2 now, which additionally tries to access files
in /proc/net, so we relax ProtectProc a bit by default as well.
This leaves us with these options unsecured:
✗ PrivateNetwork= Service has access to the host's network 0.5
✗ RestrictAddressFamilies=~AF_(INET|INET6) Service may allocate Internet sockets 0.3
✗ DeviceAllow= Service has a device ACL with some special devices 0.1
✗ IPAddressDeny= Service does not define an IP address allow list 0.2
✗ PrivateDevices= Service potentially has access to hardware devices 0.2
✗ PrivateUsers= Service has access to other users 0.2
✗ SystemCallFilter=~@resources System call allow list defined for service, and @resources is included (e.g. ioprio_set is allowed) 0.2
✗ RestrictAddressFamilies=~AF_NETLINK Service may allocate netlink sockets 0.1
✗ RootDirectory=/RootImage= Service runs within the host's root directory 0.1
✗ SupplementaryGroups= Service runs with supplementary groups 0.1
✗ RestrictAddressFamilies=~AF_UNIX Service may allocate local sockets 0.1
✗ ProcSubset= Service has full access to non-process /proc files (/proc subset=) 0.1
→ Overall exposure level for home-assistant.service: 1.6 OK 🙂
