Signature error in golang version 1.18.3 #214
Description
Problem
I set up a simple login and authentication function in my application. It works fine in golang version 1.18.2 but when I updated to 1.18.3, the ParseWithClaim function always returns signature error and it works fine after I used golang version 1.18.2 again.
Environment
OS=Ubuntu 20.04.4 (WSL 2)
Go=1.18.3
IDE=VSCode
github.com/golang-jwt/jwt=v3.2.2+incompatible
github.com/joho/godotenv=v1.4.0
Codes
.env
SECRET_KEY="secret" jwt.go
func GenerateToken(userEmail string, userType string, userID uint) (string, error) { var secretKey = os.Getenv("SECRET_KEY") claims := CustomClaim{ userEmail, userType, int(userID), jwt.StandardClaims{ IssuedAt: jwt.TimeFunc().Unix(), }, } setupToken := jwt.NewWithClaims(jwt.SigningMethodHS256, claims) token, err := setupToken.SignedString([]byte(secretKey)) return token, err } func ValidateUserToken(tokenString string) (jwt.Claims, string) { var secretKey = os.Getenv("SECRET_KEY") highestType := os.Getenv("HIGHEST_TYPE") commonType := os.Getenv("COMMON_TYPE") unauthenticatedMessage := "Unauthenticated" customClaim := &CustomClaim{} _, err := jwt.ParseWithClaims(tokenString, customClaim, func(t *jwt.Token) (interface{}, error) { return []byte(secretKey), nil }) if err != nil { fmt.Println(err, "error in function ValidateToken in jwt.go") return nil, unauthenticatedMessage } else { if customClaim.UserType == highestType || customClaim.UserType == commonType { return customClaim, "" } else { return nil, unauthenticatedMessage } } } main.go
func main() { err := godotenv.Load(".env") if err != nil { log.Fatalf("Some error occured. Err: %s", err) } else { C.Config() R.NewRoutes().Run() } } Notes
I forgot to copy and past the error printed in the terminal but if I remembered correctly it says signature error. I printed out the secretKey that was used from .env and it was the same thing. So, it's not the dotenv problem in my understanding