JWT Authorization

middleware/requireAuth.go

@@ -0,0 +1,57 @@
+package middleware
+
+import (
+	"fmt"
+	"tugas1/initializers"
+
+	"net/http"
+	"os"
+	"time"
+	"tugas1/models"
+
+	"github.com/gin-gonic/gin"
+	"github.com/golang-jwt/jwt/v4"
+)
+
+func RequireAuth(c *gin.Context) {
+	// Get the cookie off req
+	tokenString, err := c.Cookie("Authorization")
+
+	if err != nil {
+		c.AbortWithStatus(http.StatusUnauthorized)
+	}
+
+	// Parse takes the token string and a function for looking up the key. The latter is especially
+
+	token, err := jwt.Parse(tokenString, func(token *jwt.Token) (interface{}, error) {
+		if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
+			return nil, fmt.Errorf("Unexpected signing method: %v", token.Header["alg"])
+		}
+
+		// hmacSampleSecret is a []byte containing your secret, e.g. []byte("my_secret_key")
+		return []byte(os.Getenv("SECRET")), nil
+	})
+
+	if claims, ok := token.Claims.(jwt.MapClaims); ok && token.Valid {
+		// Check the exp
+		if float64(time.Now().Unix()) > claims["exp"].(float64) {
+			c.AbortWithStatus(http.StatusUnauthorized)
+		}
+
+		// Find the user with token sub
+		var user models.Post
+		initializers.DB.First(&user, claims["sub"])
+
+		if user.ID == 0 {
+
+		}
+		// Attach to req
+		c.Set("user", user)
+
+		// Continue
+		c.Next()
+	} else {
+		c.AbortWithStatus(http.StatusUnauthorized)
+	}
+
+}