上传初始版，功能未经任何测试，仅为基本框架，目前为完全不可用状态

backend/utils/auth.go

@@ -0,0 +1,92 @@
+package utils
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/golang-jwt/jwt/v5"
+	"golang.org/x/crypto/bcrypt"
+)
+
+// JWTClaims JWT声明结构体
+type JWTClaims struct {
+	UserID   uint   `json:"user_id"`
+	Username string `json:"username"`
+	IsAdmin  bool   `json:"is_admin"`
+	jwt.RegisteredClaims
+}
+
+// GenerateToken 生成JWT令牌
+func GenerateToken(userID uint, username string, isAdmin bool, secretKey string, expireTime time.Duration) (string, error) {
+	// 创建声明
+	claims := JWTClaims{
+		UserID:   userID,
+		Username: username,
+		IsAdmin:  isAdmin,
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(time.Now().Add(expireTime)),
+			IssuedAt:  jwt.NewNumericDate(time.Now()),
+			NotBefore: jwt.NewNumericDate(time.Now()),
+		},
+	}
+
+	// 创建令牌
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+
+	// 签名令牌
+	tokenString, err := token.SignedString([]byte(secretKey))
+	if err != nil {
+		return "", err
+	}
+
+	return tokenString, nil
+}
+
+// ParseToken 解析JWT令牌
+func ParseToken(tokenString string, secretKey string) (*JWTClaims, error) {
+	// 解析令牌
+	token, err := jwt.ParseWithClaims(tokenString, &JWTClaims{}, func(token *jwt.Token) (interface{}, error) {
+		// 验证签名方法
+		if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
+			return nil, fmt.Errorf("unexpected signing method: %v", token.Header["alg"])
+		}
+
+		return []byte(secretKey), nil
+	})
+
+	if err != nil {
+		return nil, err
+	}
+
+	// 验证令牌并获取声明
+	if claims, ok := token.Claims.(*JWTClaims); ok && token.Valid {
+		return claims, nil
+	}
+
+	return nil, fmt.Errorf("invalid token")
+}
+
+// HashPassword 密码加密
+func HashPassword(password string) (string, error) {
+	hash, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
+	if err != nil {
+		return "", err
+	}
+
+	return string(hash), nil
+}
+
+// VerifyPassword 密码验证
+func VerifyPassword(hashedPassword, password string) error {
+	return bcrypt.CompareHashAndPassword([]byte(hashedPassword), []byte(password))
+}
+
+// GenerateRandomString 生成随机字符串
+func GenerateRandomString(length int) string {
+	const charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+	randomBytes := make([]byte, length)
+	for i := range randomBytes {
+		randomBytes[i] = charset[time.Now().UnixNano()%int64(len(charset))]
+	}
+	return string(randomBytes)
+}