diff options
Diffstat (limited to 'auth')
| -rw-r--r-- | auth/refresh.go | 118 | ||||
| -rw-r--r-- | auth/router.go | 11 |
2 files changed, 124 insertions, 5 deletions
diff --git a/auth/refresh.go b/auth/refresh.go new file mode 100644 index 0000000..6a77a78 --- /dev/null +++ b/auth/refresh.go @@ -0,0 +1,118 @@ +/* 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 auth + +import ( + "context" + "github.com/MikunoNaka/OpenBills-server/database" + "github.com/MikunoNaka/OpenBills-server/user" + "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" + "go.mongodb.org/mongo-driver/mongo" + "net/http" + "time" +) + +var db *mongo.Collection = database.DB.Collection("Users") + +var ( + 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") + 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.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.User + if err := db.FindOne(context.TODO(), bson.M{"_id": id}).Decode(&u); err != nil { + return "", 0, user.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, user.Session{Name: sessionName, Token: token}) + db.UpdateOne(context.TODO(), bson.M{"_id": id}, bson.D{{"$set", u}}) + + return token, expiresAt, nil +} diff --git a/auth/router.go b/auth/router.go index 9fa03b7..9782915 100644 --- a/auth/router.go +++ b/auth/router.go @@ -19,6 +19,7 @@ package auth import ( "github.com/MikunoNaka/OpenBills-server/user" + "github.com/MikunoNaka/OpenBills-server/util" "github.com/gin-gonic/gin" "log" "net/http" @@ -27,16 +28,16 @@ import ( func Routes(route *gin.Engine) { r := route.Group("/auth") { - r.POST("/login", user.checkPassword(), func(ctx *gin.Context) { + r.POST("/login", user.CheckPassword(), func(ctx *gin.Context) { user := ctx.MustGet("user").(user.User) - accessToken, err := user.newAccessToken(user.Id.Hex()) + accessToken, err := util.NewAccessToken(user.Id.Hex()) if err != nil { log.Printf("Error while generating new access token: %v", err) ctx.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"message": "Internal Server Error (cannot login)"}) } - refreshToken, expiresAt, err := user.newRefreshToken(user.Id.Hex()) + refreshToken, expiresAt, err := newRefreshToken(user.Id.Hex()) if err != nil { log.Printf("Error while generating new refresh token: %v", err) ctx.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"message": "Internal Server Error (cannot login)"}) @@ -46,9 +47,9 @@ func Routes(route *gin.Engine) { ctx.JSON(http.StatusOK, gin.H{"accessToken": accessToken}) }) - r.POST("/refresh", user.verifyRefreshToken(), func(ctx *gin.Context) { + r.POST("/refresh", verifyRefreshToken(), func(ctx *gin.Context) { u := ctx.MustGet("user").(user.User) - accessToken, err := util.newAccessToken(u.Id.Hex()) + accessToken, err := util.NewAccessToken(u.Id.Hex()) if err != nil { log.Printf("Error while generating new access token: %v", err) ctx.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"message": "Internal Server Error (cannot refresh session)"}) |