do not return if client IP is not allowed in login API response

Signed-off-by: Nicola Murino <[email protected]>

internal/httpd/internal_test.go

@@ -2115,7 +2115,7 @@ func TestProxyHeaders(t *testing.T) {
 	rr := httptest.NewRecorder()
 	testServer.Config.Handler.ServeHTTP(rr, req)
 	assert.Equal(t, http.StatusUnauthorized, rr.Code)
-	assert.Contains(t, rr.Body.String(), "login from IP 127.0.0.1 not allowed")
+	assert.NotContains(t, rr.Body.String(), "login from IP 127.0.0.1 not allowed")
 
 	req.RemoteAddr = testIP
 	rr = httptest.NewRecorder()

internal/httpd/server.go

@@ -530,7 +530,7 @@ func (s *httpdServer) handleWebAdminTwoFactorPost(w http.ResponseWriter, r *http
 		return
 	}
 	if err := verifyCSRFToken(r.Form.Get(csrfFormToken), ipAddr); err != nil {
-		err = handleDefenderEventLoginFailed(ipAddr, err)
+		handleDefenderEventLoginFailed(ipAddr, err) //nolint:errcheck
 		s.renderTwoFactorPage(w, r, util.NewI18nError(err, util.I18nErrorInvalidCSRF), ipAddr)
 		return
 	}
@@ -948,9 +948,10 @@ func (s *httpdServer) getToken(w http.ResponseWriter, r *http.Request) {
 	ipAddr := util.GetIPFromRemoteAddress(r.RemoteAddr)
 	admin, err := dataprovider.CheckAdminAndPass(username, password, ipAddr)
 	if err != nil {
-		err = handleDefenderEventLoginFailed(ipAddr, err)
+		handleDefenderEventLoginFailed(ipAddr, err) //nolint:errcheck
 		w.Header().Set(common.HTTPAuthenticationHeader, basicRealm)
-		sendAPIResponse(w, r, err, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
+		sendAPIResponse(w, r, dataprovider.ErrInvalidCredentials, http.StatusText(http.StatusUnauthorized),
+			http.StatusUnauthorized)
 		return
 	}
 	if admin.Filters.TOTPConfig.Enabled {