add checks to user update processing

controllers/user.go

@@ -331,7 +331,18 @@ func updateUser(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-Type", "application/json")
 	var params = mux.Vars(r)
 	// start here
+	jwtUser, _, isadmin, err := logic.VerifyJWT(r.Header.Get("Authorization"))
+	if err != nil {
+		logger.Log(0, "verifyJWT error", err.Error())
+		logic.ReturnErrorResponse(w, r, logic.FormatError(err, "internal"))
+		return
+	}
 	username := params["username"]
+	if username != jwtUser && !isadmin {
+		logger.Log(0, "non-admin user", jwtUser, "attempted to update user", username)
+		logic.ReturnErrorResponse(w, r, logic.FormatError(errors.New("not authorizied"), "unauthorized"))
+		return
+	}
 	user, err := logic.GetUser(username)
 	if err != nil {
 		logger.Log(0, username,
@@ -354,6 +365,11 @@ func updateUser(w http.ResponseWriter, r *http.Request) {
 		logic.ReturnErrorResponse(w, r, logic.FormatError(err, "badrequest"))
 		return
 	}
+	if userchange.IsAdmin && !isadmin {
+		logger.Log(0, "non-admin user", jwtUser, "attempted get admin privilages")
+		logic.ReturnErrorResponse(w, r, logic.FormatError(errors.New("not authorizied"), "unauthorized"))
+		return
+	}
 	userchange.Networks = nil
 	user, err = logic.UpdateUser(&userchange, user)
 	if err != nil {

logic/jwts.go

@@ -3,6 +3,7 @@ package logic
 import (
 	"errors"
 	"fmt"
+	"strings"
 	"time"
 
 	"github.com/golang-jwt/jwt/v4"
@@ -101,6 +102,18 @@ func CreateUserJWT(username string, networks []string, isadmin bool) (response s
 	return "", err
 }
 
+// VerifyJWT verifies Auth Header
+func VerifyJWT(bearerToken string) (username string, networks []string, isadmin bool, err error) {
+	token := ""
+	tokenSplit := strings.Split(bearerToken, " ")
+	if len(tokenSplit) > 1 {
+		token = tokenSplit[1]
+	} else {
+		return "", nil, false, errors.New("invalid auth header")
+	}
+	return VerifyUserToken(token)
+}
+
 // VerifyUserToken func will used to Verify the JWT Token while using APIS
 func VerifyUserToken(tokenString string) (username string, networks []string, isadmin bool, err error) {
 	claims := &models.UserClaims{}