nixos/tests/systemd-cryptenroll: add basic TPM2 test

nixos/tests/all-tests.nix

@@ -429,6 +429,7 @@ in
   systemd-binfmt = handleTestOn ["x86_64-linux"] ./systemd-binfmt.nix {};
   systemd-boot = handleTest ./systemd-boot.nix {};
   systemd-confinement = handleTest ./systemd-confinement.nix {};
+  systemd-cryptenroll = handleTest ./systemd-cryptenroll.nix {};
   systemd-journal = handleTest ./systemd-journal.nix {};
   systemd-networkd = handleTest ./systemd-networkd.nix {};
   systemd-networkd-dhcpserver = handleTest ./systemd-networkd-dhcpserver.nix {};

nixos/tests/systemd-cryptenroll.nix

@@ -0,0 +1,55 @@
+import ./make-test-python.nix ({ pkgs, ... }: {
+  name = "systemd-cryptenroll";
+  meta = with pkgs.lib.maintainers; {
+    maintainers = [ ymatsiuk ];
+  };
+
+  machine = { pkgs, lib, ... }: {
+    environment.systemPackages = [ pkgs.cryptsetup ];
+    virtualisation = {
+      emptyDiskImages = [ 512 ];
+      memorySize = 1024;
+      qemu.options = [
+        "-chardev socket,id=chrtpm,path=/tmp/swtpm-sock"
+        "-tpmdev emulator,id=tpm0,chardev=chrtpm"
+        "-device tpm-tis,tpmdev=tpm0"
+      ];
+    };
+  };
+
+  testScript = ''
+    import subprocess
+    import tempfile
+
+    def start_swtpm(tpmstate):
+        subprocess.Popen(["${pkgs.swtpm}/bin/swtpm", "socket", "--tpmstate", "dir="+tpmstate, "--ctrl", "type=unixio,path=/tmp/swtpm-sock", "--log", "level=0", "--tpm2"])
+
+    with tempfile.TemporaryDirectory() as tpmstate:
+        start_swtpm(tpmstate)
+        machine.start()
+
+        # Verify the TPM device is available and accessible by systemd-cryptenroll
+        machine.succeed("test -e /dev/tpm0")
+        machine.succeed("test -e /dev/tpmrm0")
+        machine.succeed("systemd-cryptenroll --tpm2-device=list")
+
+        # Create LUKS partition
+        machine.succeed("echo -n lukspass | cryptsetup luksFormat -q /dev/vdb -")
+        # Enroll new LUKS key and bind it to Secure Boot state
+        # For more details on PASSWORD variable, check the following issue:
+        # https://github.com/systemd/systemd/issues/20955
+        machine.succeed("PASSWORD=lukspass systemd-cryptenroll --tpm2-device=auto --tpm2-pcrs=7 /dev/vdb")
+        # Add LUKS partition to /etc/crypttab to test auto unlock
+        machine.succeed("echo 'luks /dev/vdb - tpm2-device=auto' >> /etc/crypttab")
+        machine.shutdown()
+
+        start_swtpm(tpmstate)
+        machine.start()
+
+        # Test LUKS partition automatic unlock on boot
+        machine.wait_for_unit("systemd-cryptsetup@luks.service")
+        # Wipe TPM2 slot
+        machine.succeed("systemd-cryptenroll --wipe-slot=tpm2 /dev/vdb")
+  '';
+})
+