package utils import ( "errors" "os" "time" "github.com/golang-jwt/jwt/v4" ) type JWTClaim struct { Username string `json:"username"` Email string `json:"email"` jwt.RegisteredClaims } func GenerateJWT(email string, username string) (tokenString string, err error) { expirationTime := time.Now().Add(24 * time.Hour) claims := &JWTClaim{ Email: email, Username: username, RegisteredClaims: jwt.RegisteredClaims{ ExpiresAt: jwt.NewNumericDate(expirationTime), }, } token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims) tokenString, err = token.SignedString([]byte(os.Getenv("JWT_SECRET"))) return } func ValidateToken(signedToken string) (err error) { token, err := jwt.ParseWithClaims( signedToken, &JWTClaim{}, func(token *jwt.Token) (interface{}, error) { return []byte(os.Getenv("JWT_SECRET")), nil }, ) if err != nil { return } claims, ok := token.Claims.(*JWTClaim) if !ok { err = errors.New("couldn't parse claims") return } if claims.ExpiresAt.Unix() < jwt.NewNumericDate(time.Now().Local()).Unix() { err = errors.New("token expired") return } return }