Skip to content

Use systemd credentials to provision secrets for attestation server #100

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Draft
wants to merge 1 commit into
base: master
Choose a base branch
from
Draft

Use systemd credentials to provision secrets for attestation server #100

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
9 changes: 4 additions & 5 deletions nixos/attestation-server/module.nix
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -111,7 +111,9 @@ in
wantedBy = [ "multi-user.target" ];
requires = [ "network-online.target" ];

serviceConfig = {
serviceConfig = (lib.optionalAttrs (cfg.email.passwordFile != null) {
LoadCredential = "emailPassword:${cfg.email.passwordFile}";
}) // {
ExecStart = "${cfg.package}/bin/AttestationServer";
ExecStartPre = let
inherit (cfg.email) username passwordFile host port local;
Expand All @@ -120,7 +122,7 @@ in
# truncate the trailing newline (\n = char(10)) anyway.
values = lib.concatStringsSep ", " [
"('emailUsername', '${username}')"
"('emailPassword', TRIM(readfile('%S/attestation/emailPassword'), char(10)))"
"('emailPassword', TRIM(readfile('$CREDENTIALS_DIRECTORY/emailPassword'), char(10)))"
"('emailHost', '${host}')"
"('emailPort', '${toString port}')"
"('emailLocal', '${if local then "1" else "0"}')"
Expand All @@ -129,12 +131,9 @@ in
# Note the leading + on the first command. The passwordFile could be
Copy link
Collaborator

@danielfullmer danielfullmer Jun 8, 2021

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

We can remove this comment as well

# anywhere in the file system, so it has to be copied as root and
# permissions fixed to be accessible by the service.
"+${pkgs.coreutils}/bin/install -m 0640 -g keys ${passwordFile} %S/attestation/emailPassword"
''${pkgs.sqlite}/bin/sqlite3 %S/attestation/attestation.db "CREATE TABLE IF NOT EXISTS Configuration (key TEXT PRIMARY KEY NOT NULL, value NOT NULL)"''
''${pkgs.sqlite}/bin/sqlite3 %S/attestation/attestation.db "INSERT OR REPLACE INTO Configuration VALUES ${values}"''
"${pkgs.coreutils}/bin/rm -f %S/attestation/emailPassword"
];
SupplementaryGroups = [ "keys" ];

# When sending TERM, e.g. for restart, AttestationServer fails with
# this exit code.
Expand Down