chore: establish local platform baseline

2026-08-26 06:41:54 +08:00
commit 29bdf4900f
575 changed files with 95644 additions and 0 deletions
@@ -0,0 +1,41 @@
+package main
+
+import (
+	"crypto/ed25519"
+	"crypto/sha256"
+	"encoding/base64"
+	"encoding/hex"
+	"strings"
+	"testing"
+)
+
+func TestSignFirmwareProducesVerifiableManifest(t *testing.T) {
+	content := []byte("deterministic firmware fixture")
+	result, err := signFirmware("terminal-a", "rev-b", "1.2.3", content)
+	if err != nil {
+		t.Fatal(err)
+	}
+	digest := sha256.Sum256(content)
+	if result.SHA256 != hex.EncodeToString(digest[:]) || result.Size != len(content) {
+		t.Fatalf("digest=%s size=%d", result.SHA256, result.Size)
+	}
+	for _, fragment := range []string{"model=terminal-a", "hardware_revision=rev-b", "version=1.2.3", "sha256=" + result.SHA256} {
+		if !strings.Contains(result.Manifest, fragment) {
+			t.Fatalf("manifest missing %q: %s", fragment, result.Manifest)
+		}
+	}
+	publicKey, err := base64.StdEncoding.DecodeString(result.PublicKeyBase64)
+	if err != nil {
+		t.Fatal(err)
+	}
+	signature, err := base64.StdEncoding.DecodeString(result.SignatureBase64)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !ed25519.Verify(ed25519.PublicKey(publicKey), []byte(result.Manifest), signature) {
+		t.Fatal("firmware signature did not verify")
+	}
+	if ed25519.Verify(ed25519.PublicKey(publicKey), []byte(result.Manifest+"tampered"), signature) {
+		t.Fatal("tampered manifest unexpectedly verified")
+	}
+}