diff --git a/metropolis/test/launch/swtpm.go b/metropolis/test/launch/swtpm.go
new file mode 100644
index 0000000..fa5cb78
--- /dev/null
+++ b/metropolis/test/launch/swtpm.go
@@ -0,0 +1,186 @@
+package launch
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"sort"
+	"strings"
+
+	"github.com/bazelbuild/rules_go/go/runfiles"
+
+	"source.monogon.dev/osbase/test/launch"
+)
+
+// A TPMFactory manufactures virtual TPMs using swtpm.
+//
+// A factory has an assigned state directory into which it will write per-factory
+// data (like CA certificates and keys). Each manufactured TPM also has a state
+// directory, which is first generated on manufacturing, and then passed to an
+// swtpm instance.
+type TPMFactory struct {
+	stateDir string
+}
+
+// NewTPMFactory creates a new TPM factory at a given state path. The state path
+// is a directory used to persist TPM factory data. It will be created if needed,
+// and can be reused across TPM factories (but not used in parallel).
+func NewTPMFactory(stateDir string) (*TPMFactory, error) {
+	if err := os.MkdirAll(stateDir, 0744); err != nil {
+		return nil, fmt.Errorf("could not create state directory: %w", err)
+	}
+
+	f := &TPMFactory{
+		stateDir: stateDir,
+	}
+
+	if err := os.MkdirAll(f.caDir(), 0700); err != nil {
+		return nil, fmt.Errorf("could not create CA state directory: %w", err)
+	}
+	err := writeSWTPMConfig(f.localCAConfPath(), map[string]string{
+		"statedir":   f.caDir(),
+		"signingkey": filepath.Join(f.caDir(), "signkey.pem"),
+		"issuercert": filepath.Join(f.caDir(), "issuercert.pem"),
+		"certserial": filepath.Join(f.caDir(), "certserial"),
+	})
+	if err != nil {
+		return nil, err
+	}
+	return f, nil
+}
+
+func (f *TPMFactory) caDir() string {
+	return filepath.Join(f.stateDir, "ca")
+}
+
+func (f *TPMFactory) localCAConfPath() string {
+	return filepath.Join(f.caDir(), "swtpm-localca.conf")
+}
+
+func (f *TPMFactory) localCAOptionsPath() string {
+	return filepath.Join(f.caDir(), "swtpm-localca.options")
+}
+
+func (f *TPMFactory) swtpmConfPath() string {
+	return filepath.Join(f.stateDir, "swtpm.conf")
+}
+
+// writeSWTPMConfig serializes a key/value config file for swtpm tools into a
+// path.
+func writeSWTPMConfig(path string, data map[string]string) error {
+	var keys []string
+	for k := range data {
+		keys = append(keys, k)
+	}
+	sort.Strings(keys)
+
+	f, err := os.Create(path)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+	for _, k := range keys {
+		if _, err := fmt.Fprintf(f, "%s = %s\n", k, data[k]); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// A TPMPlatform defines a platform that a TPM is part of. This will usually be
+// some kind of device, in this case a virtual device.
+type TPMPlatform struct {
+	Manufacturer string
+	Version      string
+	Model        string
+}
+
+// Manufacture builds a new TPM for a given platform at a path. The path points
+// to a directory that will be created if it doens't exist yet, and can be passed
+// to swtpm to actually emulate the created TPM.
+func (f *TPMFactory) Manufacture(ctx context.Context, path string, platform *TPMPlatform) error {
+	launch.Log("Starting to manufacture TPM for %s... (%+v)", path, platform)
+
+	// Path to state file. Used to make sure Manufacture runs only once.
+	permall := filepath.Join(path, "tpm2-00.permall")
+
+	if _, err := os.Stat(permall); err == nil {
+		launch.Log("Skipping manufacturing TPM for %s, already exists", path)
+		return nil
+	}
+
+	// Find all tools.
+	swtpm, err := runfiles.Rlocation("swtpm/swtpm")
+	if err != nil {
+		return fmt.Errorf("could not find swtpm: %w", err)
+	}
+	swtpmSetup, err := runfiles.Rlocation("swtpm/swtpm_setup")
+	if err != nil {
+		return fmt.Errorf("could not find swtpm_setup: %w", err)
+	}
+	swtpmLocalca, err := runfiles.Rlocation("swtpm/swtpm_localca")
+	if err != nil {
+		return fmt.Errorf("could not find swtpm_localca: %w", err)
+	}
+	swtpmCert, err := runfiles.Rlocation("_main/metropolis/test/swtpm/swtpm_cert/swtpm_cert_/swtpm_cert")
+	if err != nil {
+		return fmt.Errorf("could not find swtpm_cert: %w", err)
+	}
+	certtool, err := runfiles.Rlocation("_main/metropolis/test/swtpm/certtool/certtool_/certtool")
+	if err != nil {
+		return fmt.Errorf("could not find certtool: %w", err)
+	}
+
+	// Prepare swtpm-localca.options.
+	options := []string{
+		"--platform-manufacturer " + platform.Manufacturer,
+		"--platform-version " + platform.Version,
+		"--platform-model " + platform.Model,
+		"",
+	}
+	err = os.WriteFile(f.localCAOptionsPath(), []byte(strings.Join(options, "\n")), 0600)
+	if err != nil {
+		return fmt.Errorf("could not write local options: %w", err)
+	}
+
+	// Prepare swptm.conf.
+	err = writeSWTPMConfig(f.swtpmConfPath(), map[string]string{
+		"create_certs_tool":         swtpmLocalca,
+		"create_certs_tool_config":  f.localCAConfPath(),
+		"create_certs_tool_options": f.localCAOptionsPath(),
+	})
+	if err != nil {
+		return fmt.Errorf("could not write swtpm.conf: %w", err)
+	}
+
+	if err := os.MkdirAll(path, 0700); err != nil {
+		return fmt.Errorf("could not make output path: %w", err)
+	}
+	cmd := exec.CommandContext(ctx, swtpmSetup,
+		"--tpm", fmt.Sprintf("%s socket", swtpm),
+		"--tpmstate", path,
+		"--create-ek-cert",
+		"--create-platform-cert",
+		"--allow-signing",
+		"--tpm2",
+		"--display",
+		"--pcr-banks", "sha1,sha256,sha384,sha512",
+		"--config", f.swtpmConfPath())
+	cmd.Env = append(cmd.Env, fmt.Sprintf("PATH=%s:%s", filepath.Dir(swtpmCert), filepath.Dir(certtool)))
+	cmd.Env = append(cmd.Env, "MONOGON_LIBTPMS_ACKNOWLEDGE_UNSAFE=yes")
+	if out, err := cmd.CombinedOutput(); err != nil {
+		log.Printf("Manufacturing TPM for %s failed: swtm_setup: %s", path, out)
+		return fmt.Errorf("swtpm_setup failed: %w", err)
+	}
+
+	if _, err := os.Stat(permall); os.IsNotExist(err) {
+		log.Printf("Manufacturing TPM for %s failed: state file did not get created", path)
+		return fmt.Errorf("%s did not get created during TPM manufacture", permall)
+	}
+
+	launch.Log("Successfully manufactured TPM for %s", path)
+	return nil
+}