update

pkg/auth/jwt.go

@@ -0,0 +1,68 @@
+package auth
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"time"
+
+	"github.com/golang-jwt/jwt/v5"
+)
+
+// Claims JWT claims
+type Claims struct {
+	Username string `json:"username"`
+	jwt.RegisteredClaims
+}
+
+// JWTAuth JWT 认证管理器
+type JWTAuth struct {
+	secret     []byte
+	expiration time.Duration
+}
+
+// NewJWTAuth 创建 JWT 认证管理器
+func NewJWTAuth(secret string, expHours int) *JWTAuth {
+	if secret == "" {
+		secret = generateSecret()
+	}
+	return &JWTAuth{
+		secret:     []byte(secret),
+		expiration: time.Duration(expHours) * time.Hour,
+	}
+}
+
+// GenerateToken 生成 JWT token
+func (j *JWTAuth) GenerateToken(username string) (string, error) {
+	claims := &Claims{
+		Username: username,
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(time.Now().Add(j.expiration)),
+			IssuedAt:  jwt.NewNumericDate(time.Now()),
+			Issuer:    "gotunnel",
+		},
+	}
+
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	return token.SignedString(j.secret)
+}
+
+// ValidateToken 验证 JWT token
+func (j *JWTAuth) ValidateToken(tokenString string) (*Claims, error) {
+	token, err := jwt.ParseWithClaims(tokenString, &Claims{}, func(token *jwt.Token) (interface{}, error) {
+		return j.secret, nil
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	if claims, ok := token.Claims.(*Claims); ok && token.Valid {
+		return claims, nil
+	}
+	return nil, jwt.ErrSignatureInvalid
+}
+
+func generateSecret() string {
+	b := make([]byte, 32)
+	rand.Read(b)
+	return hex.EncodeToString(b)
+}