From 68629768cbb7c86fd4b118e7d555450297f3fb8a Mon Sep 17 00:00:00 2001
From: Vidhu Kant Sharma <vidhukant@vidhukant.xyz>
Date: Sun, 29 Jan 2023 20:45:43 +0530
Subject: moved refresh mechanism to package auth

---
 user/refresh.go | 117 --------------------------------------------------------
 1 file changed, 117 deletions(-)
 delete mode 100644 user/refresh.go

(limited to 'user/refresh.go')

diff --git a/user/refresh.go b/user/refresh.go
deleted file mode 100644
index 72a7655..0000000
--- a/user/refresh.go
+++ /dev/null
@@ -1,117 +0,0 @@
-/* OpenBills-server - Server for libre billing software OpenBills-web
- * Copyright (C) 2022  Vidhu Kant Sharma <vidhukant@vidhukant.xyz>
-
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
-
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
-
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-package user
-
-import (
-	"context"
-	"errors"
-	"fmt"
-	"github.com/MikunoNaka/OpenBills-server/util"
-	"github.com/gin-gonic/gin"
-	"github.com/golang-jwt/jwt/v4"
-	"go.mongodb.org/mongo-driver/bson"
-	"go.mongodb.org/mongo-driver/bson/primitive"
-	"net/http"
-	"time"
-)
-
-var (
-	errUserNotFound error = errors.New("user does not exist")
-	refreshSecret   []byte
-)
-
-func init() {
-	conf := util.GetConfig().Crypto
-	refreshSecret = []byte(conf.RefreshTokenSecret)
-}
-
-// middleware to check refresh token
-func verifyRefreshToken() gin.HandlerFunc {
-	return func(ctx *gin.Context) {
-		refreshToken, err := ctx.Cookie("refreshToken")
-		fmt.Println(refreshToken)
-		if err == nil {
-			token, err := jwt.ParseWithClaims(refreshToken, &jwt.StandardClaims{}, func(token *jwt.Token) (interface{}, error) {
-				return []byte(refreshSecret), nil
-			})
-			if err != nil { // invalid token
-				ctx.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"message": "invalid token"})
-			} else { // valid token
-				// convert id from string to ObjectID
-				id, _ := primitive.ObjectIDFromHex(token.Claims.(*jwt.StandardClaims).Issuer)
-
-				// check if user exists
-				var u User
-				if err := db.FindOne(context.TODO(), bson.M{"_id": id}).Decode(&u); err != nil {
-					ctx.AbortWithStatusJSON(http.StatusNotFound, gin.H{"message": "user not found"})
-				} else {
-					// check if this refreshToken is in DB
-					for _, i := range u.Sessions {
-						if i.Token == refreshToken {
-							ctx.Set("user", u)
-							ctx.Next()
-						}
-					}
-					ctx.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"message": "refresh token expired"})
-				}
-			}
-		} else {
-			// invalid Authorization header
-			ctx.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"message": "not logged in"})
-		}
-	}
-}
-
-/*
- * the refresh token has a long lifespan and is stored in
- * the database in case it needs to be revoked.
- *
- * this can be stored as an HTTP only cookie and will be used
- * when creating a new access token
- *
- * I'm using a different secret key for refresh tokens
- * for enhanced security
- */
-func newRefreshToken(userId string) (string, int64, error) {
-	// convert id from string to ObjectID
-	id, _ := primitive.ObjectIDFromHex(userId)
-
-	// check if user exists
-	var u User
-	if err := db.FindOne(context.TODO(), bson.M{"_id": id}).Decode(&u); err != nil {
-		return "", 0, errUserNotFound
-	}
-
-	// generate refresh token
-	expiresAt := time.Now().Add(time.Hour * 12).Unix()
-	claims := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.StandardClaims{
-		Issuer:    userId,
-		ExpiresAt: expiresAt,
-	})
-	token, err := claims.SignedString(refreshSecret)
-	if err != nil {
-		return "", expiresAt, err
-	}
-
-	// store refresh token in db with unique session name for ease in identification
-	sessionName := time.Now().Format("01-02-2006.15:04:05") + "-" + u.UserName
-	u.Sessions = append(u.Sessions, Session{Name: sessionName, Token: token})
-	db.UpdateOne(context.TODO(), bson.M{"_id": id}, bson.D{{"$set", u}})
-
-	return token, expiresAt, nil
-}
-- 
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