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This file is part of Logtalk https://logtalk.org/ SPDX-FileCopyrightText: 1998-2023 Paulo Moura <pmoura@logtalk.org> SPDX-License-Identifier: Apache-2.0

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

% start by loading the non-patched vault objects:

| ?- logtalk_load(complements_restrict(vaults)). ...

% open the "my_vault" vault using the correct password:

| ?- my_vault::open('!"#$%&/()='). yes

% any other password will be rejected; for example:

| ?- my_vault::open('abc123'). no

% now load the "hacker" complementing category:

| ?- logtalk_load(complements_restrict(hacker)). ...

% try the hacker replaced password and fail miserably:

| ?- my_vault::open('1234567890'). You have been hacked by SmartPants! no

% the correct, original, password is still the only one capable % of opening the vault, despite the hacker messages:

| ?- my_vault::open('!"#$%&/()='). You have been hacked by SmartPants! yes