initial commit

http/middleware/jwt.go

@@ -0,0 +1,82 @@
+package middleware
+
+import (
+	"github.com/golang-jwt/jwt/v5"
+	"net/http"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	log "github.com/sirupsen/logrus"
+	"rkkvm/config"
+)
+
+type Token struct {
+	Username string `json:"username"`
+	jwt.RegisteredClaims
+}
+
+const (
+	ExpireDuration = 31 * 24 * time.Hour // Month
+)
+
+func CheckToken() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		conf := config.Get()
+
+		if !conf.Auth {
+			c.Next()
+			return
+		}
+
+		var cookieName string
+		if conf.NanoKVMUISupport {
+			cookieName = "nano-kvm-token"
+		} else {
+			cookieName = "auth-token"
+		}
+		cookie, err := c.Cookie(cookieName)
+		if err == nil {
+			_, err = ParseJWT(cookie)
+			if err == nil {
+				c.Next()
+				return
+			}
+		}
+
+		c.JSON(http.StatusUnauthorized, "unauthorized")
+		c.Abort()
+	}
+}
+
+func GenerateJWT(username string) (string, error) {
+	cfg := config.Get()
+
+	claims := Token{
+		Username: username,
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(time.Now().Add(ExpireDuration)),
+		},
+	}
+
+	t := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+
+	return t.SignedString([]byte(cfg.AuthSecret))
+}
+
+func ParseJWT(jwtToken string) (*Token, error) {
+	cfg := config.Get()
+
+	t, err := jwt.ParseWithClaims(jwtToken, &Token{}, func(token *jwt.Token) (interface{}, error) {
+		return []byte(cfg.AuthSecret), nil
+	})
+	if err != nil {
+		log.Debugf("parse jwt error: %s", err)
+		return nil, err
+	}
+
+	if claims, ok := t.Claims.(*Token); ok && t.Valid {
+		return claims, nil
+	} else {
+		return nil, err
+	}
+}