feat(plugin): 实现插件安全验证和审计日志功能

- 添加插件签名验证机制，支持远程证书吊销列表
- 增加插件安装时的安全检查和签名验证
- 实现插件版本存储的HMAC完整性校验
- 添加插件审计日志记录插件安装和验证事件
- 增加JS插件沙箱安全限制配置
- 添加插件商店API的签名URL字段支持
- 实现安全配置的自动刷新机制

internal/client/tunnel/version_store.go

@@ -1,15 +1,26 @@
 package tunnel
 
 import (
+	"crypto/hmac"
+	"crypto/sha256"
+	"encoding/hex"
 	"encoding/json"
+	"fmt"
 	"os"
 	"path/filepath"
 	"sync"
 )
 
+// versionStoreData 版本存储数据结构（带 HMAC）
+type versionStoreData struct {
+	Versions map[string]string `json:"versions"`
+	HMAC     string            `json:"hmac"`
+}
+
 // PluginVersionStore 插件版本存储
 type PluginVersionStore struct {
 	path     string
+	hmacKey  []byte
 	versions map[string]string // pluginName -> version
 	mu       sync.RWMutex
 }
@@ -18,6 +29,7 @@ type PluginVersionStore struct {
 func NewPluginVersionStore(dataDir string) (*PluginVersionStore, error) {
 	store := &PluginVersionStore{
 		path:     filepath.Join(dataDir, "plugin_versions.json"),
+		hmacKey:  deriveHMACKey(dataDir),
 		versions: make(map[string]string),
 	}
 	if err := store.load(); err != nil {
@@ -26,6 +38,15 @@ func NewPluginVersionStore(dataDir string) (*PluginVersionStore, error) {
 	return store, nil
 }
 
+// deriveHMACKey 从数据目录派生 HMAC 密钥
+func deriveHMACKey(dataDir string) []byte {
+	// 使用数据目录路径和机器特征派生密钥
+	hostname, _ := os.Hostname()
+	seed := fmt.Sprintf("gotunnel-version-store:%s:%s", dataDir, hostname)
+	hash := sha256.Sum256([]byte(seed))
+	return hash[:]
+}
+
 // load 从文件加载版本信息
 func (s *PluginVersionStore) load() error {
 	data, err := os.ReadFile(s.path)
@@ -35,7 +56,26 @@ func (s *PluginVersionStore) load() error {
 	if err != nil {
 		return err
 	}
-	return json.Unmarshal(data, &s.versions)
+
+	var storeData versionStoreData
+	if err := json.Unmarshal(data, &storeData); err != nil {
+		// 尝试兼容旧格式（无 HMAC）
+		if err := json.Unmarshal(data, &s.versions); err != nil {
+			return fmt.Errorf("invalid version store format: %w", err)
+		}
+		// 迁移到新格式
+		return s.save()
+	}
+
+	// 验证 HMAC
+	if !s.verifyHMAC(storeData.Versions, storeData.HMAC) {
+		// HMAC 验证失败，可能被篡改，重置版本信息
+		s.versions = make(map[string]string)
+		return fmt.Errorf("version store integrity check failed, data may be tampered")
+	}
+
+	s.versions = storeData.Versions
+	return nil
 }
 
 // save 保存版本信息到文件
@@ -44,7 +84,16 @@ func (s *PluginVersionStore) save() error {
 	if err := os.MkdirAll(dir, 0755); err != nil {
 		return err
 	}
-	data, err := json.MarshalIndent(s.versions, "", "  ")
+
+	// 计算 HMAC
+	hmacValue := s.computeHMAC(s.versions)
+
+	storeData := versionStoreData{
+		Versions: s.versions,
+		HMAC:     hmacValue,
+	}
+
+	data, err := json.MarshalIndent(storeData, "", "  ")
 	if err != nil {
 		return err
 	}
@@ -65,3 +114,17 @@ func (s *PluginVersionStore) SetVersion(name, version string) error {
 	s.versions[name] = version
 	return s.save()
 }
+
+// computeHMAC 计算版本数据的 HMAC
+func (s *PluginVersionStore) computeHMAC(versions map[string]string) string {
+	data, _ := json.Marshal(versions)
+	h := hmac.New(sha256.New, s.hmacKey)
+	h.Write(data)
+	return hex.EncodeToString(h.Sum(nil))
+}
+
+// verifyHMAC 验证 HMAC
+func (s *PluginVersionStore) verifyHMAC(versions map[string]string, expectedHMAC string) bool {
+	computed := s.computeHMAC(versions)
+	return hmac.Equal([]byte(computed), []byte(expectedHMAC))
+}