nixos/sudo: Add tests for sudo-rs too

Duplicated sudo's testsuite for now, as its maintainer does not with
to collaborate on testing effors; see NixOS#253876.

Environment-related tests were removed, as sudo-rs does not support
`(NO)SETENV` yet; see trifectatechfoundation/sudo-rs#760

nixos/tests/all-tests.nix

@@ -739,6 +739,7 @@ in {
   strongswan-swanctl = handleTest ./strongswan-swanctl.nix {};
   stunnel = handleTest ./stunnel.nix {};
   sudo = handleTest ./sudo.nix {};
+  sudo-rs = handleTest ./sudo-rs.nix {};
   swap-file-btrfs = handleTest ./swap-file-btrfs.nix {};
   swap-partition = handleTest ./swap-partition.nix {};
   swap-random-encryption = handleTest ./swap-random-encryption.nix {};

nixos/tests/sudo-rs.nix

@@ -0,0 +1,97 @@
+# Some tests to ensure sudo is working properly.
+{ pkgs, sudo-rs, ... }:
+let
+  inherit (pkgs.lib) mkIf optionalString;
+  password = "helloworld";
+in
+  import ./make-test-python.nix ({ lib, pkgs, ...} : {
+    name = "sudo";
+    meta.maintainers = pkgs.sudo-rs.meta.maintainers;
+
+    nodes.machine =
+      { lib, ... }:
+      {
+        environment.systemPackages = [ pkgs.faketty ];
+        users.groups = { foobar = {}; barfoo = {}; baz = { gid = 1337; }; };
+        users.users = {
+          test0 = { isNormalUser = true; extraGroups = [ "wheel" ]; };
+          test1 = { isNormalUser = true; password = password; };
+          test2 = { isNormalUser = true; extraGroups = [ "foobar" ]; password = password; };
+          test3 = { isNormalUser = true; extraGroups = [ "barfoo" ]; };
+          test4 = { isNormalUser = true; extraGroups = [ "baz" ]; };
+          test5 = { isNormalUser = true; };
+        };
+
+        security.sudo = {
+          enable = true;
+          package = sudo-rs;
+          wheelNeedsPassword = false;
+
+          extraRules = [
+            # SUDOERS SYNTAX CHECK (Test whether the module produces a valid output;
+            # errors being detected by the visudo checks.
+
+            # These should not create any entries
+            { users = [ "notest1" ]; commands = [ ]; }
+            { commands = [ { command = "ALL"; options = [ ]; } ]; }
+
+            # Test defining commands with the options syntax, though not setting any options
+            { users = [ "notest2" ]; commands = [ { command = "ALL"; options = [ ]; } ]; }
+
+
+            # CONFIGURATION FOR TEST CASES
+            { users = [ "test1" ]; groups = [ "foobar" ]; commands = [ "ALL" ]; }
+            { groups = [ "barfoo" 1337 ]; commands = [ { command = "ALL"; options = [ "NOPASSWD" ]; } ]; }
+            { users = [ "test5" ]; commands = [ { command = "ALL"; options = [ "NOPASSWD" ]; } ]; runAs = "test1:barfoo"; }
+          ];
+        };
+      };
+
+    nodes.strict = { ... }: {
+      environment.systemPackages = [ pkgs.faketty ];
+      users.users = {
+        admin = { isNormalUser = true; extraGroups = [ "wheel" ]; };
+        noadmin = { isNormalUser = true; };
+      };
+
+      security.sudo = {
+        package = sudo-rs;
+        enable = true;
+        wheelNeedsPassword = false;
+        execWheelOnly = true;
+      };
+    };
+
+    testScript =
+      ''
+        with subtest("users in wheel group should have passwordless sudo"):
+            machine.succeed('faketty -- su - test0 -c "sudo -u root true"')
+
+        with subtest("test1 user should have sudo with password"):
+            machine.succeed('faketty -- su - test1 -c "echo ${password} | sudo -S -u root true"')
+
+        with subtest("test1 user should not be able to use sudo without password"):
+            machine.fail('faketty -- su - test1 -c "sudo -n -u root true"')
+
+        with subtest("users in group 'foobar' should be able to use sudo with password"):
+            machine.succeed('faketty -- su - test2 -c "echo ${password} | sudo -S -u root true"')
+
+        with subtest("users in group 'barfoo' should be able to use sudo without password"):
+            machine.succeed("sudo -u test3 sudo -n -u root true")
+
+        with subtest("users in group 'baz' (GID 1337)"):
+            machine.succeed("sudo -u test4 sudo -n -u root echo true")
+
+        with subtest("test5 user should be able to run commands under test1"):
+            machine.succeed("sudo -u test5 sudo -n -u test1 true")
+
+        with subtest("test5 user should not be able to run commands under root"):
+            machine.fail("sudo -u test5 sudo -n -u root true")
+
+        with subtest("users in wheel should be able to run sudo despite execWheelOnly"):
+            strict.succeed('faketty -- su - admin -c "sudo -u root true"')
+
+        with subtest("non-wheel users should be unable to run sudo thanks to execWheelOnly"):
+            strict.fail('faketty -- su - noadmin -c "sudo --help"')
+      '';;
+  })

pkgs/tools/security/sudo-rs/default.nix

@@ -4,6 +4,7 @@
 , fetchpatch
 , installShellFiles
 , nix-update-script
+, nixosTests
 , pam
 , pandoc
 , rustPlatform
@@ -73,7 +74,10 @@ rustPlatform.buildRustPackage rec {
     "su::context::tests::invalid_shell"
   ];
 
-  passthru.updateScript = nix-update-script { };
+  passthru = {
+    updateScript = nix-update-script { };
+    tests = nixosTests.sudo-rs;
+  };
 
   meta = with lib; {
     description = "A memory safe implementation of sudo and su.";