STRLCPY/vucsa

■ ■ ■ ■ ■ ■

.gitignore

1	+	# Gradle
2	+	.gradle
3	+	gradle**
4	+	# Eclipse, Idea, ...
5	+	.settings
6	+	.idea
7	+	bin
8	+	build
9	+	doc
10	+

■ ■ ■ ■ ■ ■

CHANGELOG.md

1	+	# Changelog
2	+
3	+	All notable changes to this project will are documented in this changelog file.
4	+
5	+	## [1.0.0] - 2022-01-01
6	+	### Added
7	+	- common functionality
8	+	- server and client implementation
9	+	- 7 basic challenges
10	+	- Buffer Over-read (simulated)
11	+	- Command Execution
12	+	- SQL Injection
13	+	- Enumeration
14	+	- XML
15	+	- Horizontal Access Control
16	+	- Vertical Access Control

■ ■ ■ ■ ■ ■

LICENSE.md

1	+	### GNU GENERAL PUBLIC LICENSE
2	+
3	+	Version 3, 29 June 2007
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621	+	### How to Apply These Terms to Your New Programs
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623	+	If you develop a new program, and you want it to be of the greatest
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649	+	Also add information on how to contact you by electronic and paper
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652	+	If the program does terminal interaction, make it output a short
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658	+	under certain conditions; type `show c' for details.
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660	+	The hypothetical commands \`show w' and \`show c' should show the
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665	+	You should also get your employer (if you work as a programmer) or
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667	+	necessary. For more information on this, and how to apply and follow
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670	+	The GNU General Public License does not permit incorporating your
671	+	program into proprietary programs. If your program is a subroutine
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673	+	applications with the library. If this is what you want to do, use the
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675	+	please read <https://www.gnu.org/licenses/why-not-lgpl.html>.
676	+

■ ■ ■ ■ ■ ■

README.md

1	+	# ![Vulnerable Client-Server Application (VuCSA)](http://vucsa.warxim.com/img/logo.png)
2	+	# Vulnerable Client-Server Application (VuCSA)
3	+	Vulnerable client-server application (VuCSA) is made for learning/presenting how to perform penetration tests of non-http thick clients.
4	+	It is written in Java (with JavaFX graphical user interface).
5	+
6	+	Currently the vulnerable application contains the following challenges:
7	+	1. Buffer Over-read (simulated)
8	+	2. Command Execution
9	+	3. SQL Injection
10	+	4. Enumeration
11	+	5. XML
12	+	6. Horizontal Access Control
13	+	7. Vertical Access Control
14	+
15	+	If you want to know how to solve these challenges, take a look at the [PETEP website](http://petep.warxim.com/methodology/),
16	+	which describes how to use the open-source tool PETEP to exploit them.
17	+
18	+	Tip: Before you start hacking, do not forget to check the data structure of messages bellow.
19	+
20	+	## How to Run
21	+	In order to run the vulnerable server and client, you can use one of releases on GitHub
22	+	or run gradle assemble, which creates distribution packages (for both Windows and Unix).
23	+	These packages contain sh/bat scripts that will run the server and client using JVM.
24	+
25	+	## Project Structure
26	+	Project is divided into three modules:
27	+	- vulnerable-common - common functionality for both client and server (including protocol processing utilities)
28	+	- vulnerable-client - vulnerable client with JavaFX GUI
29	+	- vulnerable-server - vulnerable server for terminal use
30	+
31	+	## Data Structure
32	+	Messages transmitted between server and client have the following simple format:
33	+
34	+	[type][target][length][payload]
35	+	32b 32b 32b ???
36	+
37	+	These four parts have the following meaning:
38	+	- type - type of the message (used for serialization/deserialization)
39	+	- target - target handler that will receive the message
40	+	- length - length of the payload
41	+	- payload - data serialized into bytes
42	+

■ ■ ■ ■ ■ ■

build.gradle

1	+	plugins {
2	+	id 'java'
3	+	id 'application'
4	+	}
5	+
6	+	group 'com.warxim'
7	+	version '1.0'
8	+
9	+	repositories {
10	+	mavenCentral()
11	+	}
12	+
13	+	dependencies {
14	+	compile project(":vucsa-common")
15	+	compile project(":vucsa-client")
16	+	compile project(":vucsa-server")
17	+	}
18	+
19	+	distributions {
20	+	main {
21	+	distributionBaseName = "vucsa"
22	+	contents {
23	+	from("LICENSE.md") {
24	+	into ""
25	+	}
26	+
27	+	from("CHANGELOG.md") {
28	+	into ""
29	+	}
30	+
31	+	from("scripts") {
32	+	into ""
33	+	}
34	+
35	+	from("vucsa-server/server") {
36	+	into "server"
37	+	}
38	+
39	+	startScripts.onlyIf {false}
40	+	}
41	+	}
42	+	}

■ ■ ■ ■ ■ ■

scripts/client.bat

1	+	@echo off
2	+	set JAVA_EXE=java.exe
3	+	set JAVAW_EXE=javaw.exe
4	+	set DIRNAME=%~dp0
5	+	set APP_HOME=%DIRNAME%
6	+	set CMD_LINE_ARGS=%*
7	+	set DEFAULT_JVM_OPTS=
8	+	set CLASSPATH=%APP_HOME%\lib\*
9	+	set MAIN_CLASS="com.warxim.vucsa.client.Main"
10	+
11	+	rem Start Vulnerable Client with GUI (without console).
12	+	start "" /b "%JAVAW_EXE%" %DEFAULT_JVM_OPTS% -classpath "%CLASSPATH%" %MAIN_CLASS% %CMD_LINE_ARGS%
13	+

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scripts/client.sh

1	+	#!/bin/bash
2	+
3	+	JAVA="java"
4	+	APP_HOME="`pwd`"
5	+	DEFAULT_JVM_OPTS=
6	+	CMD_LINE_ARGS=$@
7	+	CLASSPATH=$APP_HOME/lib/*
8	+	MAIN_CLASS="com.warxim.vucsa.client.Main"
9	+	LOG_FILE=client.log
10	+
11	+	nohup $JAVA -cp "$CLASSPATH" $MAIN_CLASS $CMD_LINE_ARGS > $LOG_FILE &
12	+

■ ■ ■ ■ ■ ■

scripts/server.bat

1	+	@echo off
2	+	set JAVA_EXE=java.exe
3	+	set JAVAW_EXE=javaw.exe
4	+	set DIRNAME=%~dp0
5	+	set APP_HOME=%DIRNAME%
6	+	set CMD_LINE_ARGS=%*
7	+	set DEFAULT_JVM_OPTS=
8	+	set CLASSPATH=%APP_HOME%\lib\*
9	+	set MAIN_CLASS="com.warxim.vucsa.server.Main"
10	+
11	+	rem Start Vulnerable Server without GUI (let console open).
12	+	"%JAVA_EXE%" %DEFAULT_JVM_OPTS% -classpath "%CLASSPATH%" %MAIN_CLASS% %CMD_LINE_ARGS%
13	+

■ ■ ■ ■ ■ ■

scripts/server.sh

1	+	#!/bin/bash
2	+
3	+	JAVA="java"
4	+	APP_HOME="`pwd`"
5	+	DEFAULT_JVM_OPTS=
6	+	CMD_LINE_ARGS=$@
7	+	CLASSPATH=$APP_HOME/lib/*
8	+	MAIN_CLASS="com.warxim.vucsa.server.Main"
9	+	LOG_FILE=server.log
10	+
11	+	$JAVA -cp "$CLASSPATH" $MAIN_CLASS $CMD_LINE_ARGS
12	+

■ ■ ■ ■ ■ ■

settings.gradle

1	+	rootProject.name = 'VuCSA'
2	+
3	+	include 'vucsa-common'
4	+	include 'vucsa-client'
5	+	include 'vucsa-server'
6	+
7	+

■ ■ ■ ■ ■ ■

vucsa-client/build.gradle

1	+	plugins {
2	+	id 'java-library'
3	+	id 'java'
4	+	id 'eclipse'
5	+	id 'application'
6	+	id 'org.openjfx.javafxplugin' version '0.0.13'
7	+	}
8	+
9	+	javafx {
10	+	version = "11.0.2"
11	+	modules = ['javafx.controls', 'javafx.fxml', 'javafx.web']
12	+	}
13	+
14	+	group 'com.warxim'
15	+	version '1.0'
16	+	mainClassName = 'com.warxim.vucsa.client.Main'
17	+
18	+	repositories {
19	+	mavenCentral()
20	+	}
21	+
22	+	dependencies {
23	+	implementation project(':vucsa-common')
24	+
25	+	compileOnly 'org.projectlombok:lombok:1.18.24'
26	+	annotationProcessor 'org.projectlombok:lombok:1.18.24'
27	+
28	+	implementation group: 'org.openjfx', name: 'javafx-base', version: javafx.version, classifier: 'win'
29	+	implementation group: 'org.openjfx', name: 'javafx-base', version: javafx.version, classifier: 'mac'
30	+	implementation group: 'org.openjfx', name: 'javafx-base', version: javafx.version, classifier: 'linux'
31	+	implementation group: 'org.openjfx', name: 'javafx-controls', version: javafx.version, classifier: 'win'
32	+	implementation group: 'org.openjfx', name: 'javafx-controls', version: javafx.version, classifier: 'mac'
33	+	implementation group: 'org.openjfx', name: 'javafx-controls', version: javafx.version, classifier: 'linux'
34	+	implementation group: 'org.openjfx', name: 'javafx-fxml', version: javafx.version, classifier: 'win'
35	+	implementation group: 'org.openjfx', name: 'javafx-fxml', version: javafx.version, classifier: 'mac'
36	+	implementation group: 'org.openjfx', name: 'javafx-fxml', version: javafx.version, classifier: 'linux'
37	+	implementation group: 'org.openjfx', name: 'javafx-graphics', version: javafx.version, classifier: 'win'
38	+	implementation group: 'org.openjfx', name: 'javafx-graphics', version: javafx.version, classifier: 'mac'
39	+	implementation group: 'org.openjfx', name: 'javafx-graphics', version: javafx.version, classifier: 'linux'
40	+	implementation group: 'org.openjfx', name: 'javafx-media', version: javafx.version, classifier: 'win'
41	+	implementation group: 'org.openjfx', name: 'javafx-media', version: javafx.version, classifier: 'mac'
42	+	implementation group: 'org.openjfx', name: 'javafx-media', version: javafx.version, classifier: 'linux'
43	+	implementation group: 'org.openjfx', name: 'javafx-web', version: javafx.version, classifier: 'win'
44	+	implementation group: 'org.openjfx', name: 'javafx-web', version: javafx.version, classifier: 'mac'
45	+	implementation group: 'org.openjfx', name: 'javafx-web', version: javafx.version, classifier: 'linux'
46	+	}
47	+
48	+	// Export com.sun.javafx.css (for css editing)
49	+	application {
50	+	applicationDefaultJvmArgs = [
51	+	"--add-opens=javafx.graphics/com.sun.javafx.css=ALL-UNNAMED"
52	+	]
53	+	executableDir = ''
54	+	}
55	+
56	+	// Set run working directory to build/run
57	+	File runningDir = new File('build/run')
58	+	runningDir.mkdirs()
59	+	tasks.run.workingDir = runningDir

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/Bundle.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client;
18	+
19	+	import com.warxim.vucsa.client.core.ClientManager;
20	+	import lombok.Getter;
21	+
22	+	/**
23	+	* Singleton for client assets.
24	+	*/
25	+	@Getter
26	+	public final class Bundle {
27	+	/**
28	+	* Singleton instance.
29	+	*/
30	+	private static volatile Bundle instance;
31	+
32	+	/**
33	+	* Client manager
34	+	*/
35	+	private final ClientManager clientManager;
36	+
37	+	private Bundle() {
38	+	clientManager = new ClientManager();
39	+	}
40	+
41	+	/**
42	+	* Creates instance of bundle or returns existing instance if it exists.
43	+	* @return Bundle instance
44	+	*/
45	+	public static Bundle getInstance() {
46	+	if (instance == null) {
47	+	synchronized(Bundle.class) {
48	+	if (instance == null) {
49	+	instance = new Bundle();
50	+	}
51	+	}
52	+	}
53	+
54	+	return instance;
55	+	}
56	+
57	+	/**
58	+	* Destroys the bundle.
59	+	*/
60	+	public void destroy() {
61	+	// nothing to destroy
62	+	}
63	+	}

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/Main.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client;
18	+
19	+	import com.warxim.vucsa.client.gui.GuiApplication;
20	+	import com.warxim.vucsa.client.gui.GuiBundle;
21	+	import com.warxim.vucsa.client.gui.dialog.Dialogs;
22	+	import javafx.application.Application;
23	+
24	+	/**
25	+	* Main client application class.
26	+	*/
27	+	public final class Main {
28	+	public static void main(String... args) {
29	+	init();
30	+	launch();
31	+	}
32	+
33	+	/**
34	+	* Initializes GUI bundle.
35	+	*/
36	+	private static void init() {
37	+	var guiBundle = GuiBundle.getInstance();
38	+	Dialogs.setDefaultIcon(guiBundle.getLogo());
39	+	}
40	+
41	+	/**
42	+	* Launches GUI application.
43	+	*/
44	+	private static void launch() {
45	+	Application.launch(GuiApplication.class);
46	+	}
47	+
48	+	private Main() {}
49	+	}
50	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/challenge/ChallengeController.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.challenge;
18	+
19	+	import com.warxim.vucsa.client.Bundle;
20	+	import com.warxim.vucsa.common.message.Message;
21	+
22	+	/**
23	+	* Base class of challenge controllers.
24	+	*/
25	+	public abstract class ChallengeController {
26	+	/**
27	+	* Sends message using client manager.
28	+	* @param message Message to be sent
29	+	* @return {@code true} if the message has been successfully sent
30	+	*/
31	+	protected boolean sendMessage(Message message) {
32	+	var clientManager = Bundle.getInstance().getClientManager();
33	+	return clientManager.sendMessage(message);
34	+	}
35	+	}
36	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/challenge/ChallengeWrapper.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.challenge;
18	+
19	+	import com.warxim.vucsa.common.connection.listener.ConnectionListener;
20	+	import javafx.scene.Node;
21	+	import lombok.Builder;
22	+	import lombok.Value;
23	+
24	+	/**
25	+	* Wrapper for keeping JavaFX node and controller of a challenge.
26	+	*/
27	+	@Value
28	+	@Builder
29	+	public class ChallengeWrapper implements ConnectionListener {
30	+	/**
31	+	* Challenge node, which is displayed in the tab.
32	+	*/
33	+	Node node;
34	+
35	+	/**
36	+	* Controller for controlling the challenge GUI.
37	+	*/
38	+	ChallengeController controller;
39	+	}
40	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/challenge/bufferoverread/BufferOverreadController.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.challenge.bufferoverread;
18	+
19	+	import com.warxim.vucsa.client.Bundle;
20	+	import com.warxim.vucsa.client.challenge.ChallengeController;
21	+	import com.warxim.vucsa.client.gui.dialog.Dialogs;
22	+	import com.warxim.vucsa.common.ChallengeConstant;
23	+	import com.warxim.vucsa.common.message.bufferoverread.StringListMessage;
24	+	import javafx.application.Platform;
25	+	import javafx.event.ActionEvent;
26	+	import javafx.fxml.FXML;
27	+	import javafx.fxml.Initializable;
28	+	import javafx.scene.control.ContextMenu;
29	+	import javafx.scene.control.ListView;
30	+	import javafx.scene.control.MenuItem;
31	+
32	+	import java.net.URL;
33	+	import java.util.List;
34	+	import java.util.ResourceBundle;
35	+
36	+	/**
37	+	* Buffer over-read controller handles buffer over-read challenge, which uses simple echo with transformation of input
38	+	* to simulate buffer over-read vulnerability.
39	+	*/
40	+	public class BufferOverreadController extends ChallengeController implements Initializable {
41	+	private final BufferOverreadHandler handler = new BufferOverreadHandler(this);
42	+
43	+	@FXML
44	+	private ListView<String> requestInput;
45	+	@FXML
46	+	private ListView<String> responseInput;
47	+
48	+	@Override
49	+	public void initialize(URL location, ResourceBundle resources) {
50	+	initHandler();
51	+	initDefaultItems();
52	+	initContextMenu();
53	+	}
54	+
55	+	/**
56	+	* Sets items to the input component.
57	+	* @param items Items to be set
58	+	*/
59	+	public void setItems(List<String> items) {
60	+	Platform.runLater(() -> responseInput.getItems().setAll(items));
61	+	}
62	+
63	+	/**
64	+	* Sends items to server.
65	+	*/
66	+	@FXML
67	+	private void onSendClick(ActionEvent event) {
68	+	var items = requestInput.getItems();
69	+	var message = StringListMessage.builder()
70	+	.target(ChallengeConstant.BUFFER_OVERREAD_TARGET)
71	+	.items(items)
72	+	.build();
73	+	sendMessage(message);
74	+	}
75	+
76	+	/**
77	+	* Adds new item.
78	+	*/
79	+	@FXML
80	+	private void onAddItemClick(ActionEvent event) {
81	+	var maybeValue = Dialogs.createTextInputDialog("Add Item", "Value");
82	+	if (maybeValue.isEmpty()) {
83	+	return;
84	+	}
85	+	requestInput.getItems().add(maybeValue.get());
86	+	}
87	+
88	+	/**
89	+	* Removes existing item.
90	+	*/
91	+	@FXML
92	+	private void onRemoveItemClick(ActionEvent event) {
93	+	var selected = requestInput.getSelectionModel().getSelectedIndex();
94	+	if (selected < 0) {
95	+	return;
96	+	}
97	+
98	+	requestInput.getItems().remove(selected);
99	+	}
100	+
101	+	/**
102	+	* Initializes buffer over-read message handler.
103	+	*/
104	+	private void initHandler() {
105	+	Bundle.getInstance().getClientManager().registerHandler(ChallengeConstant.BUFFER_OVERREAD_TARGET, handler);
106	+	}
107	+
108	+	/**
109	+	* Initializes default items in the challenge GUI.
110	+	*/
111	+	private void initDefaultItems() {
112	+	requestInput.getItems().add("Item 1");
113	+	requestInput.getItems().add("Item 2");
114	+	requestInput.getItems().add("Item 3");
115	+	}
116	+
117	+	/**
118	+	* Initializes context menu of request input.
119	+	*/
120	+	private void initContextMenu() {
121	+	var menu = new ContextMenu();
122	+	var addItem = new MenuItem("Add");
123	+	addItem.setOnAction(this::onAddItemClick);
124	+	var removeItem = new MenuItem("Remove");
125	+	removeItem.setOnAction(this::onRemoveItemClick);
126	+
127	+	menu.getItems().add(addItem);
128	+	menu.getItems().add(removeItem);
129	+	requestInput.setContextMenu(menu);
130	+	}
131	+	}
132	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/challenge/bufferoverread/BufferOverreadHandler.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.challenge.bufferoverread;
18	+
19	+	import com.warxim.vucsa.common.connection.Connection;
20	+	import com.warxim.vucsa.common.message.Message;
21	+	import com.warxim.vucsa.common.message.MessageHandler;
22	+	import com.warxim.vucsa.common.message.bufferoverread.StringListMessage;
23	+	import lombok.RequiredArgsConstructor;
24	+
25	+	/**
26	+	* Handler for handling messages for buffer over-read challenge.
27	+	*/
28	+	@RequiredArgsConstructor
29	+	public class BufferOverreadHandler implements MessageHandler {
30	+	private final BufferOverreadController controller;
31	+
32	+	@Override
33	+	public boolean supports(Message message) {
34	+	return message instanceof StringListMessage;
35	+	}
36	+
37	+	@Override
38	+	public boolean handleMessage(Connection connection, Message message) {
39	+	controller.setItems(((StringListMessage) message).getItems());
40	+	return true;
41	+	}
42	+	}
43	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/challenge/commandexecution/CommandExecutionController.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.challenge.commandexecution;
18	+
19	+	import com.warxim.vucsa.client.Bundle;
20	+	import com.warxim.vucsa.client.challenge.ChallengeController;
21	+	import com.warxim.vucsa.common.ChallengeConstant;
22	+	import com.warxim.vucsa.common.message.commandexecution.request.PingRequest;
23	+	import javafx.application.Platform;
24	+	import javafx.beans.value.ObservableValue;
25	+	import javafx.event.ActionEvent;
26	+	import javafx.fxml.FXML;
27	+	import javafx.fxml.Initializable;
28	+	import javafx.scene.control.TextArea;
29	+	import javafx.scene.control.TextField;
30	+
31	+	import java.net.URL;
32	+	import java.util.ResourceBundle;
33	+
34	+	/**
35	+	* Command execution controller handles command execution challenge.
36	+	* <p>Requests server to do PING command and shows output.</p>
37	+	*/
38	+	public class CommandExecutionController extends ChallengeController implements Initializable {
39	+	private final CommandExecutionHandler handler = new CommandExecutionHandler(this);
40	+
41	+	@FXML
42	+	private TextField hostInput;
43	+	@FXML
44	+	private TextArea resultOutput;
45	+
46	+	@Override
47	+	public void initialize(URL location, ResourceBundle resources) {
48	+	initHandler();
49	+	hostInput.textProperty().addListener(this::onHostInputChange);
50	+	}
51	+	/**
52	+	* Sets output to the text area.
53	+	* @param output Output to be set
54	+	*/
55	+	public void setOutput(String output) {
56	+	Platform.runLater(() -> resultOutput.setText(output));
57	+	}
58	+
59	+	/**
60	+	* Sends ping request to server.
61	+	*/
62	+	@FXML
63	+	private void onPingClick(ActionEvent event) {
64	+	var message = PingRequest.builder()
65	+	.target(ChallengeConstant.COMMAND_EXECUTION_TARGET)
66	+	.host(hostInput.getText())
67	+	.build();
68	+	sendMessage(message);
69	+	}
70	+
71	+	/**
72	+	* Initializes command execution message handler.
73	+	*/
74	+	private void initHandler() {
75	+	Bundle.getInstance().getClientManager().registerHandler(ChallengeConstant.COMMAND_EXECUTION_TARGET, handler);
76	+	}
77	+
78	+	/**
79	+	* Removes invalid characters from host input on change.
80	+	*/
81	+	private void onHostInputChange(
82	+	ObservableValue<? extends String> observable,
83	+	String oldValue,
84	+	String newValue) {
85	+	if (!newValue.matches("0-9a-zA-Z\\.-")) {
86	+	hostInput.setText(newValue.replaceAll("[^0-9a-zA-Z.-]", ""));
87	+	}
88	+	}
89	+	}
90	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/challenge/commandexecution/CommandExecutionHandler.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.challenge.commandexecution;
18	+
19	+	import com.warxim.vucsa.common.connection.Connection;
20	+	import com.warxim.vucsa.common.message.Message;
21	+	import com.warxim.vucsa.common.message.MessageHandler;
22	+	import com.warxim.vucsa.common.message.commandexecution.response.PingResponse;
23	+	import lombok.RequiredArgsConstructor;
24	+
25	+	@RequiredArgsConstructor
26	+	public class CommandExecutionHandler implements MessageHandler {
27	+	private final CommandExecutionController controller;
28	+
29	+	@Override
30	+	public boolean supports(Message message) {
31	+	return message instanceof PingResponse;
32	+	}
33	+
34	+	@Override
35	+	public boolean handleMessage(Connection connection, Message message) {
36	+	controller.setOutput(((PingResponse) message).getOutput());
37	+	return true;
38	+	}
39	+	}
40	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/challenge/enumeration/EnumerationController.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.challenge.enumeration;
18	+
19	+	import com.warxim.vucsa.client.Bundle;
20	+	import com.warxim.vucsa.client.challenge.ChallengeController;
21	+	import com.warxim.vucsa.common.ChallengeConstant;
22	+	import com.warxim.vucsa.common.message.enumeration.LoginStatus;
23	+	import com.warxim.vucsa.common.message.enumeration.request.LoginRequest;
24	+	import javafx.application.Platform;
25	+	import javafx.event.ActionEvent;
26	+	import javafx.fxml.FXML;
27	+	import javafx.fxml.Initializable;
28	+	import javafx.scene.control.Label;
29	+	import javafx.scene.control.PasswordField;
30	+	import javafx.scene.control.TextField;
31	+
32	+	import java.net.URL;
33	+	import java.util.ResourceBundle;
34	+
35	+	/**
36	+	* Enumeration controller handles enumeration challenge.
37	+	* <p>Simulates user login and displays result.</p>
38	+	*/
39	+	public class EnumerationController extends ChallengeController implements Initializable {
40	+	private final EnumerationHandler handler = new EnumerationHandler(this);
41	+
42	+	@FXML
43	+	private TextField usernameInput;
44	+	@FXML
45	+	private PasswordField passwordInput;
46	+	@FXML
47	+	private Label resultLabel;
48	+
49	+	@Override
50	+	public void initialize(URL location, ResourceBundle resources) {
51	+	initHandler();
52	+	}
53	+
54	+	/**
55	+	* Sets login result to the GUI.
56	+	* @param status Login status
57	+	* @param userSecret Secret of logged user
58	+	*/
59	+	public void setResult(LoginStatus status, String userSecret) {
60	+	Platform.runLater(() -> {
61	+	switch (status) {
62	+	case SUCCESS:
63	+	resultLabel.setText("Successfully logged in! Your secret is: \"" + userSecret + "\"");
64	+	break;
65	+	case WRONG_USERNAME:
66	+	resultLabel.setText("Wrong username!");
67	+	break;
68	+	case WRONG_PASSWORD:
69	+	resultLabel.setText("Wrong password!");
70	+	break;
71	+	}
72	+	});
73	+	}
74	+
75	+	/**
76	+	* Sends login request to the server.
77	+	*/
78	+	@FXML
79	+	private void onLoginClick(ActionEvent event) {
80	+	var message = LoginRequest.builder()
81	+	.target(ChallengeConstant.ENUMERATION_TARGET)
82	+	.username(usernameInput.getText())
83	+	.password(passwordInput.getText())
84	+	.build();
85	+	sendMessage(message);
86	+	}
87	+
88	+	/**
89	+	* Initializes enumeration message handler.
90	+	*/
91	+	private void initHandler() {
92	+	Bundle.getInstance().getClientManager().registerHandler(ChallengeConstant.ENUMERATION_TARGET, handler);
93	+	}
94	+	}
95	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/challenge/enumeration/EnumerationHandler.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.challenge.enumeration;
18	+
19	+	import com.warxim.vucsa.common.connection.Connection;
20	+	import com.warxim.vucsa.common.message.Message;
21	+	import com.warxim.vucsa.common.message.MessageHandler;
22	+	import com.warxim.vucsa.common.message.enumeration.response.LoginResponse;
23	+	import lombok.RequiredArgsConstructor;
24	+
25	+	/**
26	+	* Handler for login response messages for enumeration challenge.
27	+	*/
28	+	@RequiredArgsConstructor
29	+	public class EnumerationHandler implements MessageHandler {
30	+	private final EnumerationController controller;
31	+
32	+	@Override
33	+	public boolean supports(Message message) {
34	+	return message instanceof LoginResponse;
35	+	}
36	+
37	+	@Override
38	+	public boolean handleMessage(Connection connection, Message message) {
39	+	var loginResponse = ((LoginResponse) message);
40	+	controller.setResult(loginResponse.getStatus(), loginResponse.getUserSecret());
41	+	return true;
42	+	}
43	+	}
44	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/challenge/horizontalaccesscontrol/DocumentItem.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.challenge.horizontalaccesscontrol;
18	+
19	+	import lombok.Builder;
20	+	import lombok.Value;
21	+
22	+	/**
23	+	* Document item for displaying user's documents overview.
24	+	*/
25	+	@Builder
26	+	@Value
27	+	public class DocumentItem {
28	+	int id;
29	+	String name;
30	+
31	+	@Override
32	+	public String toString() {
33	+	return name;
34	+	}
35	+	}
36	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/challenge/horizontalaccesscontrol/HorizontalAccessControlController.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.challenge.horizontalaccesscontrol;
18	+
19	+	import com.warxim.vucsa.client.Bundle;
20	+	import com.warxim.vucsa.client.challenge.ChallengeController;
21	+	import com.warxim.vucsa.common.ChallengeConstant;
22	+	import com.warxim.vucsa.common.message.horizontalaccesscontrol.request.DocumentContentRequest;
23	+	import javafx.application.Platform;
24	+	import javafx.beans.value.ObservableValue;
25	+	import javafx.fxml.Initializable;
26	+	import javafx.fxml.FXML;
27	+	import javafx.scene.control.ListView;
28	+	import javafx.scene.control.TextArea;
29	+
30	+	import java.net.URL;
31	+	import java.util.ResourceBundle;
32	+
33	+	/**
34	+	* Horizontal access controller handles horizontal access challenge.
35	+	* <p>Simulates document management of logged user and allows him to download document content of his documents.</p>
36	+	*/
37	+	public class HorizontalAccessControlController extends ChallengeController implements Initializable {
38	+	private final HorizontalAccessControlHandler handler = new HorizontalAccessControlHandler(this);
39	+
40	+	@FXML
41	+	private ListView<DocumentItem> documentInput;
42	+	@FXML
43	+	private TextArea contentOutput;
44	+
45	+	@Override
46	+	public void initialize(URL location, ResourceBundle resources) {
47	+	initHandler();
48	+	initDocuments();
49	+	}
50	+
51	+	/**
52	+	* Sets document content to GUI.
53	+	* @param content Content of the document
54	+	*/
55	+	public void setDocument(String content) {
56	+	Platform.runLater(() -> contentOutput.setText(content));
57	+	}
58	+
59	+	/**
60	+	* Initializes horizontal access control message handler.
61	+	*/
62	+	private void initHandler() {
63	+	Bundle.getInstance().getClientManager().registerHandler(ChallengeConstant.HORIZONTAL_ACCESS_CONTROL_DOCUMENT_CONTENT_TARGET, handler);
64	+	}
65	+
66	+	/**
67	+	* Initializes document overview.
68	+	*/
69	+	private void initDocuments() {
70	+	documentInput.getItems().add(DocumentItem.builder()
71	+	.id(8435)
72	+	.name("My first secret document")
73	+	.build());
74	+	documentInput.getItems().add(DocumentItem.builder()
75	+	.id(12002)
76	+	.name("Favorite books")
77	+	.build());
78	+	documentInput.getSelectionModel().selectedItemProperty().addListener(this::onDocumentSelectionChange);
79	+	}
80	+
81	+	/**
82	+	* Sends request for document content to the server, when document gets selected.
83	+	*/
84	+	private void onDocumentSelectionChange(
85	+	ObservableValue<? extends DocumentItem> observable,
86	+	DocumentItem oldValue,
87	+	DocumentItem newValue
88	+	) {
89	+	if (newValue == null) {
90	+	return;
91	+	}
92	+
93	+	sendMessage(DocumentContentRequest.builder()
94	+	.target(ChallengeConstant.HORIZONTAL_ACCESS_CONTROL_DOCUMENT_CONTENT_TARGET)
95	+	.documentId(newValue.getId())
96	+	.build());
97	+	}
98	+	}
99	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/challenge/horizontalaccesscontrol/HorizontalAccessControlHandler.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.challenge.horizontalaccesscontrol;
18	+
19	+	import com.warxim.vucsa.common.connection.Connection;
20	+	import com.warxim.vucsa.common.message.Message;
21	+	import com.warxim.vucsa.common.message.MessageHandler;
22	+	import com.warxim.vucsa.common.message.horizontalaccesscontrol.response.DocumentContentResponse;
23	+	import lombok.RequiredArgsConstructor;
24	+
25	+	/**
26	+	* Handler for document content response for horizontal access control challenge.
27	+	*/
28	+	@RequiredArgsConstructor
29	+	public class HorizontalAccessControlHandler implements MessageHandler {
30	+	private final HorizontalAccessControlController controller;
31	+
32	+	@Override
33	+	public boolean supports(Message message) {
34	+	return message instanceof DocumentContentResponse;
35	+	}
36	+
37	+	@Override
38	+	public boolean handleMessage(Connection connection, Message message) {
39	+	var documentContentResponse = ((DocumentContentResponse) message);
40	+	controller.setDocument(documentContentResponse.getContent());
41	+	return true;
42	+	}
43	+	}

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/challenge/sqlinjection/SqlInjectionController.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.challenge.sqlinjection;
18	+
19	+	import com.warxim.vucsa.client.Bundle;
20	+	import com.warxim.vucsa.client.challenge.ChallengeController;
21	+	import com.warxim.vucsa.common.ChallengeConstant;
22	+	import com.warxim.vucsa.common.message.sqlinjection.request.SearchRequest;
23	+	import com.warxim.vucsa.common.message.sqlinjection.FoodEntity;
24	+	import javafx.application.Platform;
25	+	import javafx.beans.value.ObservableValue;
26	+	import javafx.event.ActionEvent;
27	+	import javafx.fxml.FXML;
28	+	import javafx.fxml.Initializable;
29	+	import javafx.scene.control.TableColumn;
30	+	import javafx.scene.control.TableView;
31	+	import javafx.scene.control.TextField;
32	+	import javafx.scene.control.cell.PropertyValueFactory;
33	+
34	+	import java.net.URL;
35	+	import java.util.List;
36	+	import java.util.ResourceBundle;
37	+
38	+	/**
39	+	* SQL Injection Controller handles SQL injection challenge.
40	+	* <p>Simulates food menu search and displays found food.</p>
41	+	*/
42	+	public class SqlInjectionController extends ChallengeController implements Initializable {
43	+	private final SqlInjectionHandler handler = new SqlInjectionHandler(this);
44	+
45	+	@FXML
46	+	private TextField searchInput;
47	+	@FXML
48	+	private TableView<FoodEntity> resultTable;
49	+	@FXML
50	+	private TableColumn<FoodEntity, Integer> idColumn;
51	+	@FXML
52	+	private TableColumn<FoodEntity, String> nameColumn;
53	+	@FXML
54	+	private TableColumn<FoodEntity, String> descriptionColumn;
55	+	@FXML
56	+	private TableColumn<FoodEntity, Double> priceColumn;
57	+
58	+	@Override
59	+	public void initialize(URL location, ResourceBundle resources) {
60	+	initHandler();
61	+	initTable();
62	+	searchInput.textProperty().addListener(this::onSearchInputChange);
63	+	}
64	+
65	+	/**
66	+	* Sets items to the table.
67	+	* @param items Items to be set
68	+	*/
69	+	public void setItems(List<FoodEntity> items) {
70	+	Platform.runLater(() -> resultTable.getItems().setAll(items));
71	+	}
72	+
73	+	@FXML
74	+	private void onSearchClick(ActionEvent event) {
75	+	var message = SearchRequest.builder()
76	+	.target(ChallengeConstant.SQL_INJECTION_TARGET)
77	+	.search(searchInput.getText())
78	+	.build();
79	+	sendMessage(message);
80	+	}
81	+
82	+	/**
83	+	* Initializes sql injection message handler.
84	+	*/
85	+	private void initHandler() {
86	+	Bundle.getInstance().getClientManager().registerHandler(ChallengeConstant.SQL_INJECTION_TARGET, handler);
87	+	}
88	+
89	+	/**
90	+	* Initializes table columns.
91	+	*/
92	+	private void initTable() {
93	+	idColumn.setCellValueFactory(new PropertyValueFactory<>("id"));
94	+	nameColumn.setCellValueFactory(new PropertyValueFactory<>("name"));
95	+	descriptionColumn.setCellValueFactory(new PropertyValueFactory<>("description"));
96	+	priceColumn.setCellValueFactory(new PropertyValueFactory<>("price"));
97	+	}
98	+
99	+	/**
100	+	* Removes invalid characters from search input on change.
101	+	*/
102	+	private void onSearchInputChange(
103	+	ObservableValue<? extends String> observable,
104	+	String oldValue,
105	+	String newValue) {
106	+	if (!newValue.matches("\\s0-9a-zA-Z\\.-")) {
107	+	searchInput.setText(newValue.replaceAll("[^\\s0-9a-zA-Z.-]", ""));
108	+	}
109	+	}
110	+	}
111	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/challenge/sqlinjection/SqlInjectionHandler.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.challenge.sqlinjection;
18	+
19	+	import com.warxim.vucsa.common.connection.Connection;
20	+	import com.warxim.vucsa.common.message.Message;
21	+	import com.warxim.vucsa.common.message.MessageHandler;
22	+	import com.warxim.vucsa.common.message.sqlinjection.response.SearchResponse;
23	+	import lombok.RequiredArgsConstructor;
24	+
25	+	/**
26	+	* Handler for search responses for SQL injection challenge.
27	+	*/
28	+	@RequiredArgsConstructor
29	+	public class SqlInjectionHandler implements MessageHandler {
30	+	private final SqlInjectionController controller;
31	+
32	+	@Override
33	+	public boolean supports(Message message) {
34	+	return message instanceof SearchResponse;
35	+	}
36	+
37	+	@Override
38	+	public boolean handleMessage(Connection connection, Message message) {
39	+	controller.setItems(((SearchResponse) message).getEntities());
40	+	return true;
41	+	}
42	+	}

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/challenge/verticalaccesscontrol/VerticalAccessControlController.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.challenge.verticalaccesscontrol;
18	+
19	+	import com.warxim.vucsa.client.Bundle;
20	+	import com.warxim.vucsa.client.challenge.ChallengeController;
21	+	import com.warxim.vucsa.common.ChallengeConstant;
22	+	import com.warxim.vucsa.common.message.verticalaccesscontrol.UserRole;
23	+	import com.warxim.vucsa.common.message.verticalaccesscontrol.request.SecretRequest;
24	+	import com.warxim.vucsa.common.message.verticalaccesscontrol.request.UserInfoRequest;
25	+	import javafx.application.Platform;
26	+	import javafx.event.ActionEvent;
27	+	import javafx.fxml.FXML;
28	+	import javafx.fxml.Initializable;
29	+	import javafx.scene.control.Label;
30	+	import javafx.scene.layout.AnchorPane;
31	+
32	+	import java.net.URL;
33	+	import java.util.ResourceBundle;
34	+
35	+	/**
36	+	* Vertical access controller handles vertical access challenge.
37	+	* <p>Simulates sending of user info from the server to the client about his session.</p>
38	+	*/
39	+	public class VerticalAccessControlController extends ChallengeController implements Initializable {
40	+	private final VerticalAccessControlUserInfoHandler userInfoHandler = new VerticalAccessControlUserInfoHandler(this);
41	+	private final VerticalAccessControlSecretHandler secretHandler = new VerticalAccessControlSecretHandler(this);
42	+
43	+	@FXML
44	+	private Label usernameLabel;
45	+	@FXML
46	+	private Label roleLabel;
47	+
48	+	@FXML
49	+	private AnchorPane guestPane;
50	+	@FXML
51	+	private AnchorPane userPane;
52	+	@FXML
53	+	private AnchorPane adminPane;
54	+	@FXML
55	+	private Label secretLabel;
56	+
57	+	@Override
58	+	public void initialize(URL location, ResourceBundle resources) {
59	+	initHandler();
60	+	initPanes();
61	+	}
62	+
63	+	/**
64	+	* Sets user to the GUI.
65	+	* @param username Name of the user
66	+	* @param role Role of the user
67	+	*/
68	+	public void setUser(String username, UserRole role) {
69	+	Platform.runLater(() -> {
70	+	usernameLabel.setText(username);
71	+	roleLabel.setText(role.name());
72	+
73	+	if (role.equals(UserRole.GUEST)) {
74	+	guestPane.setVisible(true);
75	+	userPane.setVisible(false);
76	+	adminPane.setVisible(false);
77	+	secretLabel.setText("-");
78	+	} else if (role.equals(UserRole.USER)) {
79	+	guestPane.setVisible(false);
80	+	userPane.setVisible(true);
81	+	adminPane.setVisible(false);
82	+	secretLabel.setText("-");
83	+	} else if (role.equals(UserRole.ADMIN)) {
84	+	guestPane.setVisible(false);
85	+	userPane.setVisible(false);
86	+	adminPane.setVisible(true);
87	+	secretLabel.setText("-");
88	+	}
89	+	});
90	+	}
91	+
92	+	/**
93	+	* Sets user secret to the GUI.
94	+	* @param secret Secret to be set
95	+	*/
96	+	public void setSecret(String secret) {
97	+	Platform.runLater(() -> secretLabel.setText(secret));
98	+	}
99	+
100	+	/**
101	+	* Sends request for user info to the server.
102	+	*/
103	+	@FXML
104	+	private void onRefreshClick(ActionEvent event) {
105	+	var message = UserInfoRequest.builder()
106	+	.target(ChallengeConstant.VERTICAL_ACCESS_CONTROL_USER_INFO_TARGET)
107	+	.build();
108	+	sendMessage(message);
109	+	}
110	+
111	+	/**
112	+	* Sends request for downloading secret to the server.
113	+	*/
114	+	@FXML
115	+	private void onDownloadSecretClick(ActionEvent event) {
116	+	var message = SecretRequest.builder()
117	+	.target(ChallengeConstant.VERTICAL_ACCESS_CONTROL_SECRET_TARGET)
118	+	.build();
119	+	sendMessage(message);
120	+	}
121	+
122	+	/**
123	+	* Initializes vertical access control message handlers.
124	+	*/
125	+	private void initHandler() {
126	+	Bundle.getInstance().getClientManager().registerHandler(ChallengeConstant.VERTICAL_ACCESS_CONTROL_USER_INFO_TARGET, userInfoHandler);
127	+	Bundle.getInstance().getClientManager().registerHandler(ChallengeConstant.VERTICAL_ACCESS_CONTROL_SECRET_TARGET, secretHandler);
128	+	}
129	+
130	+	/**
131	+	* Hides all panes.
132	+	*/
133	+	private void initPanes() {
134	+	guestPane.setVisible(false);
135	+	userPane.setVisible(false);
136	+	adminPane.setVisible(false);
137	+	}
138	+	}
139	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/challenge/verticalaccesscontrol/VerticalAccessControlSecretHandler.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.challenge.verticalaccesscontrol;
18	+
19	+	import com.warxim.vucsa.common.connection.Connection;
20	+	import com.warxim.vucsa.common.message.Message;
21	+	import com.warxim.vucsa.common.message.MessageHandler;
22	+	import com.warxim.vucsa.common.message.verticalaccesscontrol.response.SecretResponse;
23	+	import lombok.RequiredArgsConstructor;
24	+
25	+	/**
26	+	* Handler for secret response for vertical access control challenge.
27	+	*/
28	+	@RequiredArgsConstructor
29	+	public class VerticalAccessControlSecretHandler implements MessageHandler {
30	+	private final VerticalAccessControlController controller;
31	+
32	+	@Override
33	+	public boolean supports(Message message) {
34	+	return message instanceof SecretResponse;
35	+	}
36	+
37	+	@Override
38	+	public boolean handleMessage(Connection connection, Message message) {
39	+	var secretResponse = ((SecretResponse) message);
40	+	controller.setSecret(secretResponse.getSecret());
41	+	return true;
42	+	}
43	+	}

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/challenge/verticalaccesscontrol/VerticalAccessControlUserInfoHandler.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.challenge.verticalaccesscontrol;
18	+
19	+	import com.warxim.vucsa.common.connection.Connection;
20	+	import com.warxim.vucsa.common.message.Message;
21	+	import com.warxim.vucsa.common.message.MessageHandler;
22	+	import com.warxim.vucsa.common.message.verticalaccesscontrol.response.UserInfoResponse;
23	+	import lombok.RequiredArgsConstructor;
24	+
25	+	/**
26	+	* Handler for user info response for vertical access control challenge.
27	+	*/
28	+	@RequiredArgsConstructor
29	+	public class VerticalAccessControlUserInfoHandler implements MessageHandler {
30	+	private final VerticalAccessControlController controller;
31	+
32	+	@Override
33	+	public boolean supports(Message message) {
34	+	return message instanceof UserInfoResponse;
35	+	}
36	+
37	+	@Override
38	+	public boolean handleMessage(Connection connection, Message message) {
39	+	var info = ((UserInfoResponse) message);
40	+	controller.setUser(info.getUsername(), info.getRole());
41	+	return true;
42	+	}
43	+	}

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/challenge/xml/XmlController.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.challenge.xml;
18	+
19	+	import com.warxim.vucsa.client.Bundle;
20	+	import com.warxim.vucsa.client.challenge.ChallengeController;
21	+	import com.warxim.vucsa.client.gui.dialog.Dialogs;
22	+	import com.warxim.vucsa.common.ChallengeConstant;
23	+	import com.warxim.vucsa.common.message.xml.StorageItem;
24	+	import com.warxim.vucsa.common.message.xml.StorageMessage;
25	+	import javafx.application.Platform;
26	+	import javafx.event.ActionEvent;
27	+	import javafx.fxml.FXML;
28	+	import javafx.fxml.Initializable;
29	+	import javafx.scene.control.ContextMenu;
30	+	import javafx.scene.control.MenuItem;
31	+	import javafx.scene.control.TableColumn;
32	+	import javafx.scene.control.TableView;
33	+	import javafx.scene.control.cell.PropertyValueFactory;
34	+
35	+	import java.net.URL;
36	+	import java.util.List;
37	+	import java.util.ResourceBundle;
38	+
39	+	/**
40	+	* XML controller handles XML challenge.
41	+	* <p>This challenge acts like a simple ECHO functionality (simulates "storage"), but with vulnerable deserialization implementation.</p>
42	+	*/
43	+	public class XmlController extends ChallengeController implements Initializable {
44	+	private final XmlHandler handler = new XmlHandler(this);
45	+
46	+	@FXML
47	+	private TableView<StorageItem> requestTable;
48	+	@FXML
49	+	private TableColumn<StorageItem, String> requestKeyColumn;
50	+	@FXML
51	+	private TableColumn<StorageItem, String> requestValueColumn;
52	+	@FXML
53	+	private TableView<StorageItem> responseTable;
54	+	@FXML
55	+	private TableColumn<StorageItem, String> responseKeyColumn;
56	+	@FXML
57	+	private TableColumn<StorageItem, String> responseValueColumn;
58	+
59	+	@Override
60	+	public void initialize(URL location, ResourceBundle resources) {
61	+	initHandler();
62	+	initDefaultItems();
63	+	initTable();
64	+	initContextMenu();
65	+	}
66	+
67	+	/**
68	+	* Sets storage items to the GUI.
69	+	* @param items Items to be set
70	+	*/
71	+	public void setItems(List<StorageItem> items) {
72	+	Platform.runLater(() -> responseTable.getItems().setAll(items));
73	+	}
74	+
75	+	/**
76	+	* Sends storage items to server to "save" them.
77	+	*/
78	+	@FXML
79	+	private void onSendClick(ActionEvent event) {
80	+	var message = StorageMessage.builder()
81	+	.target(ChallengeConstant.XML_TARGET)
82	+	.items(requestTable.getItems())
83	+	.build();
84	+	sendMessage(message);
85	+	}
86	+
87	+	/**
88	+	* Adds new item.
89	+	*/
90	+	@FXML
91	+	private void onAddItemClick(ActionEvent event) {
92	+	var maybePair = Dialogs.createTextPairDialog("Add Item", "Key", "Value");
93	+	if (maybePair.isEmpty()) {
94	+	return;
95	+	}
96	+	var pair = maybePair.get();
97	+	requestTable.getItems().add(StorageItem.builder()
98	+	.key(pair.getKey())
99	+	.value(pair.getValue())
100	+	.build());
101	+	}
102	+
103	+	/**
104	+	* Removes existing item.
105	+	*/
106	+	@FXML
107	+	private void onRemoveItemClick(ActionEvent event) {
108	+	var selected = requestTable.getSelectionModel().getSelectedIndex();
109	+	if (selected < 0) {
110	+	return;
111	+	}
112	+
113	+	requestTable.getItems().remove(selected);
114	+	}
115	+
116	+	/**
117	+	* Initializes buffer over-read message handler.
118	+	*/
119	+	private void initHandler() {
120	+	Bundle.getInstance().getClientManager().registerHandler(ChallengeConstant.XML_TARGET, handler);
121	+	}
122	+
123	+	/**
124	+	* Initializes default items in the challenge GUI.
125	+	*/
126	+	private void initDefaultItems() {
127	+	requestTable.getItems().add(StorageItem.builder().key("Item 1").value("VALUE 1").build());
128	+	requestTable.getItems().add(StorageItem.builder().key("Item 2").value("VALUE 2").build());
129	+	requestTable.getItems().add(StorageItem.builder().key("Item 3").value("VALUE 3").build());
130	+	}
131	+
132	+	/**
133	+	* Initializes table columns.
134	+	*/
135	+	private void initTable() {
136	+	requestKeyColumn.setCellValueFactory(new PropertyValueFactory<>("key"));
137	+	requestValueColumn.setCellValueFactory(new PropertyValueFactory<>("value"));
138	+	responseKeyColumn.setCellValueFactory(new PropertyValueFactory<>("key"));
139	+	responseValueColumn.setCellValueFactory(new PropertyValueFactory<>("value"));
140	+	}
141	+
142	+	/**
143	+	* Initializes context menu of request input.
144	+	*/
145	+	private void initContextMenu() {
146	+	var menu = new ContextMenu();
147	+	var addItem = new MenuItem("Add");
148	+	addItem.setOnAction(this::onAddItemClick);
149	+	var removeItem = new MenuItem("Remove");
150	+	removeItem.setOnAction(this::onRemoveItemClick);
151	+
152	+	menu.getItems().add(addItem);
153	+	menu.getItems().add(removeItem);
154	+	requestTable.setContextMenu(menu);
155	+	}
156	+	}
157	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/challenge/xml/XmlHandler.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.challenge.xml;
18	+
19	+	import com.warxim.vucsa.common.connection.Connection;
20	+	import com.warxim.vucsa.common.message.Message;
21	+	import com.warxim.vucsa.common.message.MessageHandler;
22	+	import com.warxim.vucsa.common.message.xml.StorageMessage;
23	+	import lombok.RequiredArgsConstructor;
24	+
25	+	/**
26	+	* Handler for storage messages from server for XML challenge.
27	+	*/
28	+	@RequiredArgsConstructor
29	+	public class XmlHandler implements MessageHandler {
30	+	private final XmlController controller;
31	+
32	+	@Override
33	+	public boolean supports(Message message) {
34	+	return message instanceof StorageMessage;
35	+	}
36	+
37	+	@Override
38	+	public boolean handleMessage(Connection connection, Message message) {
39	+	controller.setItems(((StorageMessage) message).getItems());
40	+	return true;
41	+	}
42	+	}
43	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/core/Client.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.core;
18	+
19	+	import com.warxim.vucsa.common.connection.Connection;
20	+	import com.warxim.vucsa.common.connection.listener.ConnectionListener;
21	+	import com.warxim.vucsa.common.message.MessageHandler;
22	+
23	+	import java.io.IOException;
24	+	import java.net.Socket;
25	+	import java.util.logging.Level;
26	+	import java.util.logging.Logger;
27	+
28	+	/**
29	+	* Client, which is used to communicate with the server.
30	+	* <p>The client is created through ClientManager, when user starts it in the Settings tab.</p>
31	+	*/
32	+	public class Client extends Connection {
33	+	private final ClientConfig config;
34	+
35	+	public Client(
36	+	ClientConfig config,
37	+	ConnectionListener connectionListener,
38	+	MessageHandler messageHandler) {
39	+	super(1, connectionListener, messageHandler);
40	+	this.config = config;
41	+	}
42	+
43	+	@Override
44	+	protected boolean handleBeforeStart() {
45	+	if (!super.handleBeforeStart()) {
46	+	return false;
47	+	}
48	+
49	+	try {
50	+	socket = new Socket(config.getServerHost(), config.getServerPort());
51	+	} catch (IOException e) {
52	+	Logger.getGlobal().log(Level.SEVERE, "Could not start client socket!", e);
53	+	return false;
54	+	}
55	+
56	+	return true;
57	+	}
58	+	}
59	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/core/ClientConfig.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.core;
18	+
19	+	import lombok.Builder;
20	+	import lombok.Value;
21	+
22	+	/**
23	+	* Client configuration.
24	+	*/
25	+	@Value
26	+	@Builder
27	+	public class ClientConfig {
28	+	/**
29	+	* Server host (127.0.0.1, www.example.org, ...)
30	+	*/
31	+	String serverHost;
32	+
33	+	/**
34	+	* Server port (8765, ...)
35	+	*/
36	+	int serverPort;
37	+	}
38	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/core/ClientManager.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.core;
18	+
19	+	import com.warxim.vucsa.common.connection.Connection;
20	+	import com.warxim.vucsa.common.connection.ConnectionState;
21	+	import com.warxim.vucsa.common.connection.listener.ConnectionListener;
22	+	import com.warxim.vucsa.common.connection.listener.ConnectionListenerManager;
23	+	import com.warxim.vucsa.common.message.Message;
24	+	import com.warxim.vucsa.common.message.MessageHandler;
25	+	import com.warxim.vucsa.common.message.MessageHandlerManager;
26	+
27	+	/**
28	+	* Client manager for managing client connection.
29	+	* <p>Wraps all required components and handles client creation, start, stop, ...</p>
30	+	*/
31	+	public class ClientManager implements ConnectionListener {
32	+	private final ConnectionListenerManager connectionListenerManager;
33	+	private final MessageHandlerManager messageHandlerManager;
34	+	private Client client;
35	+
36	+	public ClientManager() {
37	+	this.connectionListenerManager = new ConnectionListenerManager();
38	+	this.messageHandlerManager = new MessageHandlerManager();
39	+	connectionListenerManager.registerListener(this);
40	+	}
41	+
42	+	/**
43	+	* Creates and starts client core.
44	+	* @param config Client configuration
45	+	*/
46	+	public synchronized void start(ClientConfig config) {
47	+	if (client != null) {
48	+	return;
49	+	}
50	+
51	+	client = new Client(config, connectionListenerManager, messageHandlerManager);
52	+	client.start();
53	+	}
54	+
55	+	/**
56	+	* Stops client core.
57	+	*/
58	+	public synchronized void stop() {
59	+	if (client == null) {
60	+	return;
61	+	}
62	+
63	+	client.stop();
64	+	}
65	+
66	+	/**
67	+	* Obtains client core state.
68	+	* @return Connection state
69	+	*/
70	+	public synchronized ConnectionState getState() {
71	+	if (client == null) {
72	+	return ConnectionState.STOPPED;
73	+	}
74	+
75	+	return client.getState();
76	+	}
77	+
78	+	/**
79	+	* Sends message using the client if it is available.
80	+	* <p>If the client is not available, does nothing.</p>
81	+	* @return {@code true} if the message was sent
82	+	*/
83	+	public synchronized boolean sendMessage(Message message) {
84	+	if (client != null && getState() == ConnectionState.STARTED) {
85	+	client.sendMessage(message);
86	+	return true;
87	+	}
88	+	return false;
89	+	}
90	+
91	+	/**
92	+	* Registers connection listener.
93	+	* @param clientListener Listener to be registered
94	+	*/
95	+	public void registerConnectionListener(ConnectionListener clientListener) {
96	+	connectionListenerManager.registerListener(clientListener);
97	+	}
98	+
99	+	/**
100	+	* Unregisters connection listener.
101	+	* @param clientListener Listener to be unregistered
102	+	*/
103	+	public void unregisterConnectionListener(ConnectionListener clientListener) {
104	+	connectionListenerManager.unregisterListener(clientListener);
105	+	}
106	+
107	+	/**
108	+	* Registers message handler.
109	+	* @param target Target identifier of the handler
110	+	* @param messageHandler Handler to be registered
111	+	*/
112	+	public void registerHandler(int target, MessageHandler messageHandler) {
113	+	messageHandlerManager.registerHandler(target, messageHandler);
114	+	}
115	+
116	+	/**
117	+	* Unregisters message handler.
118	+	* @param target Target identifier of the handler
119	+	*/
120	+	public void unregisterHandler(int target) {
121	+	messageHandlerManager.unregisterHandler(target);
122	+	}
123	+
124	+	@Override
125	+	public void onConnectionStop(Connection connection) {
126	+	client = null;
127	+	}
128	+	}
129	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/gui/GuiApplication.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.gui;
18	+
19	+	import com.sun.javafx.css.StyleManager;
20	+	import com.warxim.vucsa.client.Bundle;
21	+	import com.warxim.vucsa.common.Constant;
22	+	import com.warxim.vucsa.common.connection.ConnectionState;
23	+	import com.warxim.vucsa.client.gui.controller.ApplicationController;
24	+	import javafx.application.Application;
25	+	import javafx.fxml.FXMLLoader;
26	+	import javafx.scene.Parent;
27	+	import javafx.scene.Scene;
28	+	import javafx.stage.Stage;
29	+
30	+	/**
31	+	* Client GUI application.
32	+	* <p>Starts Vulnerable Client GUI.</p>
33	+	*/
34	+	public class GuiApplication extends Application {
35	+	@Override
36	+	public void start(Stage stage) throws Exception {
37	+	Application.setUserAgentStylesheet(Application.STYLESHEET_MODENA);
38	+	StyleManager.getInstance().addUserAgentStylesheet(getClass().getResource(GuiConstant.MAIN_CSS_PATH).toString());
39	+
40	+	var fxmlLoader = new FXMLLoader(getClass().getResource("/fxml/Application.fxml"));
41	+	fxmlLoader.setController(new ApplicationController());
42	+
43	+	Parent root = fxmlLoader.load();
44	+
45	+	var scene = new Scene(root);
46	+	stage.setTitle("VuCSA Client v" + Constant.VERSION);
47	+	stage.getIcons().add(GuiBundle.getInstance().getLogo());
48	+	stage.setWidth(1200);
49	+	stage.setHeight(900);
50	+	stage.setScene(scene);
51	+
52	+	stage.show();
53	+	}
54	+
55	+	@Override
56	+	public void stop() throws Exception {
57	+	super.stop();
58	+
59	+	var clientManager = Bundle.getInstance().getClientManager();
60	+	if (clientManager != null && clientManager.getState() != ConnectionState.STOPPED) {
61	+	clientManager.stop();
62	+	}
63	+
64	+	Bundle.getInstance().destroy();
65	+	GuiBundle.getInstance().destroy();
66	+	}
67	+	}
68	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/gui/GuiBundle.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.gui;
18	+
19	+	import com.warxim.vucsa.client.gui.controller.ApplicationController;
20	+	import javafx.scene.image.Image;
21	+	import lombok.Getter;
22	+
23	+	import java.util.Objects;
24	+
25	+	/**
26	+	* Singleton for client GUI assets.
27	+	*/
28	+	@Getter
29	+	public final class GuiBundle {
30	+	/**
31	+	* Singleton instance.
32	+	*/
33	+	private static volatile GuiBundle instance;
34	+
35	+	/**
36	+	* Logo icon
37	+	*/
38	+	private final Image logo;
39	+
40	+	/**
41	+	* Application controller
42	+	*/
43	+	private ApplicationController applicationController;
44	+
45	+	private GuiBundle() {
46	+	logo = new Image(Objects.requireNonNull(getClass().getResourceAsStream("/img/Logo.png")));
47	+	}
48	+
49	+	/**
50	+	* Creates instance of bundle or returns existing instance if it exists.
51	+	* @return Bundle instance
52	+	*/
53	+	public static GuiBundle getInstance() {
54	+	if (instance == null) {
55	+	synchronized(GuiBundle.class) {
56	+	if (instance == null) {
57	+	instance = new GuiBundle();
58	+	}
59	+	}
60	+	}
61	+
62	+	return instance;
63	+	}
64	+
65	+	/**
66	+	* Obtains application controller, which handles main application window UI
67	+	* @return Application controller
68	+	*/
69	+	public ApplicationController getApplicationController() {
70	+	return applicationController;
71	+	}
72	+
73	+	/**
74	+	* Sets application controller, which handles main application window UI
75	+	* @param controller Application controller
76	+	*/
77	+	public void setApplicationController(ApplicationController controller) {
78	+	applicationController = controller;
79	+	}
80	+
81	+	/**
82	+	* Destroys the bundle.
83	+	*/
84	+	public void destroy() {
85	+	// no action needed
86	+	}
87	+	}

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/gui/GuiConstant.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.gui;
18	+
19	+	public final class GuiConstant {
20	+	/**
21	+	* Path to main CSS file of the application
22	+	*/
23	+	public static final String MAIN_CSS_PATH = "/css/Main.css";
24	+
25	+	public static final int LOG_TAB_ORDER = 1;
26	+	public static final int SETTINGS_TAB_ORDER = 2;
27	+	public static final int CHALLENGES_TAB_ORDER = 10;
28	+
29	+	private GuiConstant() {}
30	+	}
31	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/gui/controller/ApplicationController.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.gui.controller;
18	+
19	+	import com.warxim.vucsa.client.Bundle;
20	+	import com.warxim.vucsa.client.challenge.commandexecution.CommandExecutionController;
21	+	import com.warxim.vucsa.client.challenge.enumeration.EnumerationController;
22	+	import com.warxim.vucsa.client.challenge.verticalaccesscontrol.VerticalAccessControlController;
23	+	import com.warxim.vucsa.client.challenge.ChallengeController;
24	+	import com.warxim.vucsa.client.challenge.ChallengeWrapper;
25	+	import com.warxim.vucsa.client.challenge.bufferoverread.BufferOverreadController;
26	+	import com.warxim.vucsa.client.challenge.horizontalaccesscontrol.HorizontalAccessControlController;
27	+	import com.warxim.vucsa.client.challenge.sqlinjection.SqlInjectionController;
28	+	import com.warxim.vucsa.client.challenge.xml.XmlController;
29	+	import com.warxim.vucsa.client.gui.GuiBundle;
30	+	import com.warxim.vucsa.client.gui.GuiConstant;
31	+	import com.warxim.vucsa.client.gui.dialog.AboutDialog;
32	+	import com.warxim.vucsa.client.util.GuiUtils;
33	+	import com.warxim.vucsa.common.connection.Connection;
34	+	import com.warxim.vucsa.common.connection.ConnectionState;
35	+	import com.warxim.vucsa.common.connection.listener.ConnectionListener;
36	+	import javafx.application.Platform;
37	+	import javafx.event.ActionEvent;
38	+	import javafx.fxml.FXML;
39	+	import javafx.fxml.FXMLLoader;
40	+	import javafx.fxml.Initializable;
41	+	import javafx.scene.Node;
42	+	import javafx.scene.control.TabPane;
43	+
44	+	import java.io.IOException;
45	+	import java.net.URL;
46	+	import java.util.LinkedList;
47	+	import java.util.List;
48	+	import java.util.ResourceBundle;
49	+	import java.util.logging.Level;
50	+	import java.util.logging.Logger;
51	+
52	+	/**
53	+	* Main application controller, which handles the whole application.
54	+	*/
55	+	public class ApplicationController implements Initializable, ConnectionListener {
56	+	private final List<ChallengeWrapper> challengeWrappers = new LinkedList<>();
57	+
58	+	@FXML
59	+	private TabPane tabs;
60	+
61	+	@Override
62	+	public void initialize(URL location, ResourceBundle resources) {
63	+	GuiBundle.getInstance().setApplicationController(this);
64	+	Bundle.getInstance().getClientManager().registerConnectionListener(this);
65	+
66	+	initApplicationTabs();
67	+	initChallengeTabs();
68	+
69	+	Logger.getGlobal().info("Application initialized!");
70	+	}
71	+
72	+	/**
73	+	* Exits application dialog.
74	+	*/
75	+	@FXML
76	+	private void onExitMenuClick(ActionEvent event) {
77	+	Platform.exit();
78	+	}
79	+	/**
80	+	* Shows application about dialog.
81	+	*/
82	+
83	+	@FXML
84	+	private void showAbout(ActionEvent e) {
85	+	AboutDialog.show();
86	+	}
87	+
88	+	@Override
89	+	public void onConnectionStart(Connection connection) {
90	+	Platform.runLater(() ->
91	+	challengeWrappers.forEach(challengeWrapper -> challengeWrapper.getNode().setDisable(false))
92	+	);
93	+	}
94	+
95	+	@Override
96	+	public void onConnectionStop(Connection connection) {
97	+	Platform.runLater(() ->
98	+	challengeWrappers.forEach(challengeWrapper -> challengeWrapper.getNode().setDisable(true))
99	+	);
100	+	}
101	+
102	+	/**
103	+	* Registers new tab to main tabs.
104	+	* @param title Title of the tab
105	+	* @param node Node to be added as a child into the tab
106	+	* @param order Order of the tab (where should the tab be placed)
107	+	*/
108	+	private void registerTab(String title, Node node, int order) {
109	+	GuiUtils.addTabToTabPane(tabs, title, node, order);
110	+	}
111	+
112	+	/**
113	+	* Initializes application tab.
114	+	*/
115	+	private void initApplicationTab(String title, String template, Object controller, int order) {
116	+	try {
117	+	var fxmlLoader = new FXMLLoader(getClass().getResource(template));
118	+	fxmlLoader.setController(controller);
119	+	registerTab(title, fxmlLoader.load(), order);
120	+	} catch (IOException e) {
121	+	Logger.getGlobal().log(Level.SEVERE, "Could not add settings tab", e);
122	+	}
123	+	}
124	+
125	+	/**
126	+	* Initializes challenge tab and saves it to {@code challengeWrappers}.
127	+	*/
128	+	private void initChallengeTab(String title, String template, ChallengeController controller, int order) {
129	+	try {
130	+	var fxmlLoader = new FXMLLoader(getClass().getResource(template));
131	+	fxmlLoader.setController(controller);
132	+	var node = (Node) fxmlLoader.load();
133	+	var wrapper = ChallengeWrapper.builder()
134	+	.controller(controller)
135	+	.node(node)
136	+	.build();
137	+	challengeWrappers.add(wrapper);
138	+	node.setDisable(Bundle.getInstance().getClientManager().getState() == ConnectionState.STOPPED);
139	+	registerTab(title, node, order);
140	+	} catch (IOException e) {
141	+	Logger.getGlobal().log(Level.SEVERE, "Could not add settings tab", e);
142	+	}
143	+	}
144	+
145	+	/**
146	+	* Initializes main application tabs.
147	+	*/
148	+	private void initApplicationTabs() {
149	+	initApplicationTab("Log", "/fxml/tab/LogTab.fxml", new LogController(), GuiConstant.LOG_TAB_ORDER);
150	+	initApplicationTab("Settings", "/fxml/tab/SettingsTab.fxml", new SettingsController(), GuiConstant.SETTINGS_TAB_ORDER);
151	+	}
152	+
153	+	/**
154	+	* Initializes challenge tabs.
155	+	* <p>Creates challenges and adds them to the tab pane.</p>
156	+	*/
157	+	private void initChallengeTabs() {
158	+	var tabOrder = GuiConstant.CHALLENGES_TAB_ORDER;
159	+	initChallengeTab(
160	+	"Buffer Over-read",
161	+	"/fxml/challenge/bufferoverread/BufferOverreadTab.fxml",
162	+	new BufferOverreadController(),
163	+	++tabOrder);
164	+	initChallengeTab(
165	+	"SQL Injection",
166	+	"/fxml/challenge/sqlinjection/SqlInjectionTab.fxml",
167	+	new SqlInjectionController(),
168	+	++tabOrder);
169	+	initChallengeTab(
170	+	"Enumeration",
171	+	"/fxml/challenge/enumeration/EnumerationTab.fxml",
172	+	new EnumerationController(),
173	+	++tabOrder);
174	+	initChallengeTab(
175	+	"Command Execution",
176	+	"/fxml/challenge/commandexecution/CommandExecutionTab.fxml",
177	+	new CommandExecutionController(),
178	+	++tabOrder);
179	+	initChallengeTab(
180	+	"XML",
181	+	"/fxml/challenge/xml/XmlTab.fxml",
182	+	new XmlController(),
183	+	++tabOrder);
184	+	initChallengeTab(
185	+	"Horizontal Access Control",
186	+	"/fxml/challenge/horizontalaccesscontrol/HorizontalAccessControlTab.fxml",
187	+	new HorizontalAccessControlController(),
188	+	++tabOrder);
189	+	initChallengeTab(
190	+	"Vertical Access Control",
191	+	"/fxml/challenge/verticalaccesscontrol/VerticalAccessControlTab.fxml",
192	+	new VerticalAccessControlController(),
193	+	++tabOrder);
194	+	}
195	+	}
196	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/gui/controller/LogController.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.gui.controller;
18	+
19	+	import javafx.application.Platform;
20	+	import javafx.css.PseudoClass;
21	+	import javafx.fxml.FXML;
22	+	import javafx.fxml.Initializable;
23	+	import javafx.scene.control.ScrollPane;
24	+	import javafx.scene.text.Font;
25	+	import javafx.scene.text.FontWeight;
26	+	import javafx.scene.text.Text;
27	+	import javafx.scene.text.TextFlow;
28	+
29	+	import java.io.PrintWriter;
30	+	import java.io.StringWriter;
31	+	import java.net.URL;
32	+	import java.util.ResourceBundle;
33	+	import java.util.logging.Handler;
34	+	import java.util.logging.Level;
35	+	import java.util.logging.LogRecord;
36	+	import java.util.logging.Logger;
37	+
38	+	/**
39	+	* Log tab controller.
40	+	* <p>Displays logs from {@link Logger#getGlobal()}.</p>
41	+	*/
42	+	public final class LogController extends Handler implements Initializable {
43	+	/**
44	+	* Maximum number of Text elements in text flow.
45	+	*/
46	+	private static final int LIMIT_LOG_CHILDREN = 150;
47	+
48	+	private static final PseudoClass INFO_PSEUDO_CLASS = PseudoClass.getPseudoClass("info");
49	+	private static final PseudoClass SEVERE_PSEUDO_CLASS = PseudoClass.getPseudoClass("severe");
50	+	private static final PseudoClass WARNING_PSEUDO_CLASS = PseudoClass.getPseudoClass("warning");
51	+	private static final PseudoClass FINE_PSEUDO_CLASS = PseudoClass.getPseudoClass("fine");
52	+	private static final PseudoClass CONFIG_PSEUDO_CLASS = PseudoClass.getPseudoClass("config");
53	+	private static final PseudoClass OTHER_PSEUDO_CLASS = PseudoClass.getPseudoClass("other");
54	+
55	+	/**
56	+	* Text flow for logs.
57	+	*/
58	+	@FXML
59	+	private TextFlow logFlow;
60	+	/**
61	+	* Scroll pane containing text flow.
62	+	*/
63	+	@FXML
64	+	private ScrollPane scrollPane;
65	+
66	+	@Override
67	+	public void initialize(URL location, ResourceBundle resources) {
68	+	Logger.getGlobal().addHandler(this);
69	+	}
70	+
71	+	@Override
72	+	public void publish(LogRecord logRecord) {
73	+	Platform.runLater(() -> this.addLogRecord(logRecord));
74	+	}
75	+
76	+	@Override
77	+	public void flush() {
78	+	// No action needed.
79	+	}
80	+
81	+	@Override
82	+	public void close() {
83	+	// No action needed.
84	+	}
85	+
86	+	/**
87	+	* Adds log logRecord to the flow.
88	+	*/
89	+	private void addLogRecord(LogRecord logRecord) {
90	+	// Level.
91	+	var level = logRecord.getLevel();
92	+
93	+	Text levelText;
94	+	if (level == Level.INFO) {
95	+	levelText = new Text("[INFO] ");
96	+	levelText.pseudoClassStateChanged(INFO_PSEUDO_CLASS, true);
97	+	} else if (level == Level.SEVERE) {
98	+	levelText = new Text("[SEVERE] ");
99	+	levelText.pseudoClassStateChanged(SEVERE_PSEUDO_CLASS, true);
100	+	} else if (level == Level.WARNING) {
101	+	levelText = new Text("[WARNING] ");
102	+	levelText.pseudoClassStateChanged(WARNING_PSEUDO_CLASS, true);
103	+	} else if (level == Level.FINE) {
104	+	levelText = new Text("[FINE] ");
105	+	levelText.pseudoClassStateChanged(FINE_PSEUDO_CLASS, true);
106	+	} else if (level == Level.CONFIG) {
107	+	levelText = new Text("[CONFIG] ");
108	+	levelText.pseudoClassStateChanged(CONFIG_PSEUDO_CLASS, true);
109	+	} else {
110	+	levelText = new Text("[OTHER] ");
111	+	levelText.pseudoClassStateChanged(OTHER_PSEUDO_CLASS, true);
112	+	}
113	+	levelText.getStyleClass().add("log-logRecord");
114	+	levelText.setFont(Font.font(null, FontWeight.BOLD, 11));
115	+
116	+	// Message.
117	+	var messageText = new Text(logRecord.getMessage());
118	+
119	+	logFlow.getChildren().add(levelText);
120	+	logFlow.getChildren().add(messageText);
121	+
122	+	// Exception.
123	+	if (logRecord.getThrown() != null) {
124	+	var exception = new StringWriter();
125	+	exception.append(System.lineSeparator());
126	+	exception.append("\tException:");
127	+	exception.append(System.lineSeparator());
128	+	exception.append("\t");
129	+	logRecord.getThrown().printStackTrace(new PrintWriter(exception));
130	+	var exceptionText = new Text(exception.toString());
131	+	logFlow.getChildren().add(exceptionText);
132	+	}
133	+
134	+	// Separator.
135	+	var logSeparator = new Text(System.lineSeparator());
136	+	logSeparator.setFont(Font.font(null, FontWeight.NORMAL, 1));
137	+	logSeparator.setLineSpacing(0);
138	+	logFlow.getChildren().add(logSeparator);
139	+
140	+	// Limit children.
141	+	var size = logFlow.getChildren().size();
142	+	if (size > LIMIT_LOG_CHILDREN) {
143	+	logFlow.getChildren().remove(0, size - LIMIT_LOG_CHILDREN);
144	+	}
145	+
146	+	// Scroll down automatically.
147	+	scrollPane.layout();
148	+	scrollPane.setVvalue(1D);
149	+	}
150	+	}

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/gui/controller/SettingsController.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.gui.controller;
18	+
19	+	import com.warxim.vucsa.client.Bundle;
20	+	import com.warxim.vucsa.client.core.ClientConfig;
21	+	import com.warxim.vucsa.client.gui.dialog.Dialogs;
22	+	import com.warxim.vucsa.common.Constant;
23	+	import com.warxim.vucsa.common.connection.Connection;
24	+	import com.warxim.vucsa.common.connection.ConnectionState;
25	+	import com.warxim.vucsa.common.connection.listener.ConnectionListener;
26	+	import javafx.application.Platform;
27	+	import javafx.event.ActionEvent;
28	+	import javafx.fxml.FXML;
29	+	import javafx.fxml.Initializable;
30	+	import javafx.scene.control.Button;
31	+	import javafx.scene.control.Label;
32	+	import javafx.scene.control.TextField;
33	+
34	+	import java.net.URL;
35	+	import java.util.Optional;
36	+	import java.util.ResourceBundle;
37	+
38	+	/**
39	+	* Controller for settings tab.
40	+	*/
41	+	public class SettingsController implements Initializable, ConnectionListener {
42	+	private static final String CONNECT_TEXT = "CONNECT";
43	+	private static final String DISCONNECT_TEXT = "DISCONNECT";
44	+
45	+	@FXML
46	+	private TextField serverHostInput;
47	+	@FXML
48	+	private TextField serverPortInput;
49	+	@FXML
50	+	private Label statusLabel;
51	+	@FXML
52	+	private Label serverHostLabel;
53	+	@FXML
54	+	private Label serverPortLabel;
55	+	@FXML
56	+	private Button startStopButton;
57	+
58	+	@Override
59	+	public void initialize(URL location, ResourceBundle resources) {
60	+	serverHostInput.setText(Constant.DEFAULT_SERVER_HOST);
61	+	serverPortInput.setText(String.valueOf(Constant.DEFAULT_SERVER_PORT));
62	+	startStopButton.setText(CONNECT_TEXT);
63	+	onConnectionStop(null);
64	+	var clientManager = Bundle.getInstance().getClientManager();
65	+	clientManager.registerConnectionListener(this);
66	+	}
67	+
68	+	@Override
69	+	public void onConnectionStart(Connection connection) {
70	+	Platform.runLater(() -> {
71	+	statusLabel.getStyleClass().add("status-connected");
72	+	statusLabel.getStyleClass().removeAll("status-disconnected");
73	+	statusLabel.setText("CONNECTED");
74	+	startStopButton.setText(DISCONNECT_TEXT);
75	+	});
76	+	}
77	+
78	+	@Override
79	+	public void onConnectionStop(Connection connection) {
80	+	Platform.runLater(() -> {
81	+	statusLabel.getStyleClass().removeAll("status-connected");
82	+	statusLabel.getStyleClass().add("status-disconnected");
83	+	statusLabel.setText("DISCONNECTED");
84	+	startStopButton.setText(CONNECT_TEXT);
85	+	});
86	+	}
87	+
88	+	/**
89	+	* Starts or stops client using client manager.
90	+	*/
91	+	@FXML
92	+	private void onStartStopClick(ActionEvent event) {
93	+	var clientManager = Bundle.getInstance().getClientManager();
94	+	var clientState = clientManager.getState();
95	+	if (clientState == ConnectionState.STARTED) {
96	+	clientManager.stop();
97	+	startStopButton.setText(CONNECT_TEXT);
98	+	} else if (clientState == ConnectionState.STOPPED) {
99	+	var settings = validateAndGetSettings();
100	+	if (settings.isEmpty()) {
101	+	return;
102	+	}
103	+	var config = ClientConfig.builder()
104	+	.serverHost(serverHostInput.getText())
105	+	.serverPort(Integer.parseInt(serverPortInput.getText()))
106	+	.build();
107	+	clientManager.start(config);
108	+	serverHostLabel.setText(serverHostInput.getText());
109	+	serverPortLabel.setText(serverPortInput.getText());
110	+	startStopButton.setText(DISCONNECT_TEXT);
111	+	}
112	+	}
113	+
114	+	/**
115	+	* Checks if the settings is valid and returns the settings if it is valid.
116	+	*/
117	+	private Optional<ClientConfig> validateAndGetSettings() {
118	+	var serverHost = serverHostInput.getText();
119	+	var serverPort = serverPortInput.getText();
120	+	if (serverHost.isBlank()) {
121	+	Dialogs.createErrorDialog(
122	+	"Server host required",
123	+	"You have to specify server host!");
124	+	return Optional.empty();
125	+	}
126	+
127	+	if (serverPort.isBlank() \|\| !isInteger(serverPort)) {
128	+	Dialogs.createErrorDialog(
129	+	"Server port required",
130	+	"You have to specify server port!");
131	+	return Optional.empty();
132	+	}
133	+
134	+	var settings = ClientConfig.builder()
135	+	.serverHost(serverHost)
136	+	.serverPort(Integer.parseInt(serverPort))
137	+	.build();
138	+	return Optional.of(settings);
139	+	}
140	+
141	+	/**
142	+	* Returns true if the value is a valid integer.
143	+	*/
144	+	private static boolean isInteger(String value) {
145	+	try {
146	+	Integer.parseInt(value);
147	+	return true;
148	+	} catch(NumberFormatException e){
149	+	return false;
150	+	}
151	+	}
152	+	}
153	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/gui/dialog/AboutDialog.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.gui.dialog;
18	+
19	+	import com.warxim.vucsa.client.gui.GuiBundle;
20	+	import com.warxim.vucsa.common.Constant;
21	+	import javafx.event.ActionEvent;
22	+	import javafx.geometry.Insets;
23	+	import javafx.scene.control.Alert;
24	+	import javafx.scene.control.Hyperlink;
25	+	import javafx.scene.control.Label;
26	+	import javafx.scene.image.ImageView;
27	+	import javafx.scene.layout.GridPane;
28	+	import javafx.stage.Stage;
29	+
30	+	import java.awt.*;
31	+	import java.io.IOException;
32	+	import java.net.URI;
33	+	import java.net.URISyntaxException;
34	+	import java.util.logging.Level;
35	+	import java.util.logging.Logger;
36	+
37	+	/**
38	+	* About dialog.
39	+	*/
40	+	public final class AboutDialog {
41	+	private AboutDialog() {
42	+	}
43	+
44	+	/**
45	+	* Shows about dialog.
46	+	*/
47	+	public static void show() {
48	+	var alert = new Alert(Alert.AlertType.INFORMATION);
49	+
50	+	alert.setTitle("About VuCSA");
51	+	alert.setHeaderText("VuCSA v" + Constant.VERSION);
52	+
53	+	var icon = GuiBundle.getInstance().getLogo();
54	+
55	+	var image = new ImageView(icon);
56	+	image.setFitWidth(50);
57	+	image.setFitHeight(50);
58	+	alert.setGraphic(image);
59	+
60	+	((Stage) alert.getDialogPane().getScene().getWindow()).getIcons().add(icon);
61	+
62	+	// Info
63	+	var infoLabel = new Label("Vulnerable client-server application (VuCSA) is made for learning/presenting how to perform penetration tests of non-http thick clients.");
64	+
65	+	// Version
66	+	var versionLabel = new Label("Version:");
67	+	versionLabel.getStyleClass().add("input-label");
68	+	var versionValueLabel = new Label(Constant.VERSION);
69	+
70	+	// Link
71	+	var linkLabel = new Label("Website: ");
72	+	linkLabel.getStyleClass().add("input-label");
73	+	var link = new Hyperlink(Constant.WEB);
74	+	link.setOnAction(AboutDialog::onWebClick);
75	+
76	+	// Copyright
77	+	var copyrightLabel = new Label("Copyright (C) Michal Valka, 2022, all rights reserved.");
78	+
79	+	// Grid
80	+	var grid = new GridPane();
81	+	grid.setMaxWidth(Double.MAX_VALUE);
82	+	grid.setHgap(10);
83	+	grid.setVgap(10);
84	+	grid.setPadding(new Insets(20, 150, 10, 10));
85	+
86	+	// Info
87	+	grid.add(infoLabel, 0, 0, 2, 1);
88	+
89	+	// Version
90	+	grid.add(versionLabel, 0, 1);
91	+	grid.add(versionValueLabel, 1, 1);
92	+
93	+	// Link
94	+	grid.add(linkLabel, 0, 2);
95	+	grid.add(link, 1, 2);
96	+
97	+	// Copyright
98	+	grid.add(copyrightLabel, 0, 3, 2, 1);
99	+
100	+	alert.getDialogPane().setContent(grid);
101	+
102	+	alert.showAndWait();
103	+	}
104	+
105	+	/**
106	+	* Opens VuCSA website.
107	+	*/
108	+	private static void onWebClick(ActionEvent event) {
109	+	try {
110	+	Desktop.getDesktop().browse(new URI(Constant.WEB));
111	+	} catch (IOException \| URISyntaxException e) {
112	+	Logger.getGlobal().log(Level.SEVERE, "Could not open VuCSA link.");
113	+	}
114	+	}
115	+	}
116	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/java/com/warxim/vucsa/client/gui/dialog/Dialogs.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.gui.dialog;
18	+
19	+	import javafx.geometry.Insets;
20	+	import javafx.scene.control.*;
21	+	import javafx.scene.control.Alert.AlertType;
22	+	import javafx.scene.image.Image;
23	+	import javafx.scene.layout.GridPane;
24	+	import javafx.scene.layout.Priority;
25	+	import javafx.stage.Stage;
26	+	import javafx.util.Pair;
27	+
28	+	import java.io.PrintWriter;
29	+	import java.io.StringWriter;
30	+	import java.util.List;
31	+	import java.util.Optional;
32	+
33	+	/**
34	+	* Dialog helper.
35	+	*/
36	+	public final class Dialogs {
37	+	private static Image defaultIcon;
38	+
39	+	/**
40	+	* Gets default icon of PETEP.
41	+	* @return JavaFX image object
42	+	*/
43	+	public static Image getDefaultIcon() {
44	+	return defaultIcon;
45	+	}
46	+
47	+	/**
48	+	* Sets default icon of PETEP.
49	+	* @param icon Icon to be used through the whole PETEP.
50	+	*/
51	+	public static void setDefaultIcon(Image icon) {
52	+	defaultIcon = icon;
53	+	}
54	+
55	+	/**
56	+	* Creates simple error dialog (with error icon).
57	+	* @param title Dialog title
58	+	* @param message Dialog content message
59	+	*/
60	+	public static void createErrorDialog(String title, String message) {
61	+	var alert = new Alert(AlertType.ERROR);
62	+	alert.setTitle(title);
63	+	alert.setHeaderText(title);
64	+	alert.setContentText(message);
65	+	((Stage) alert.getDialogPane().getScene().getWindow()).getIcons().add(defaultIcon);
66	+	alert.showAndWait();
67	+	}
68	+
69	+	/**
70	+	* Creates simple success dialog (with info icon).
71	+	* @param title Dialog title
72	+	* @param message Dialog content message
73	+	*/
74	+	public static void createInfoDialog(String title, String message) {
75	+	var alert = new Alert(AlertType.INFORMATION);
76	+	alert.setTitle(title);
77	+	alert.setHeaderText(title);
78	+	alert.setContentText(message);
79	+	((Stage) alert.getDialogPane().getScene().getWindow()).getIcons().add(defaultIcon);
80	+	alert.showAndWait();
81	+	}
82	+
83	+	/**
84	+	* Creates simple exception dialog.
85	+	* @param title Dialog title
86	+	* @param message Dialog content message
87	+	* @param exception Exception to be displayed in textarea.
88	+	*/
89	+	public static void createExceptionDialog(String title, String message, Exception exception) {
90	+	var alert = new Alert(AlertType.ERROR);
91	+	alert.setTitle(title);
92	+	alert.setHeaderText(title);
93	+	alert.setContentText(message);
94	+
95	+	((Stage) alert.getDialogPane().getScene().getWindow()).getIcons().add(defaultIcon);
96	+
97	+	var stringWriter = new StringWriter();
98	+	var printWriter = new PrintWriter(stringWriter);
99	+	exception.printStackTrace(printWriter);
100	+	var exceptionText = stringWriter.toString();
101	+
102	+	var textArea = new TextArea(exceptionText);
103	+	textArea.setEditable(false);
104	+	textArea.setWrapText(true);
105	+
106	+	textArea.setMaxWidth(Double.MAX_VALUE);
107	+	textArea.setMaxHeight(Double.MAX_VALUE);
108	+	GridPane.setVgrow(textArea, Priority.ALWAYS);
109	+	GridPane.setHgrow(textArea, Priority.ALWAYS);
110	+
111	+	var label = new Label("The exception stacktrace was:");
112	+
113	+	var expContent = new GridPane();
114	+	expContent.setMaxWidth(Double.MAX_VALUE);
115	+	expContent.add(label, 0, 0);
116	+	expContent.add(textArea, 0, 1);
117	+
118	+	alert.getDialogPane().setExpandableContent(expContent);
119	+
120	+	alert.showAndWait();
121	+	}
122	+
123	+	/**
124	+	* Creates simple yes / no / cancel dialog.
125	+	* @param title Dialog title
126	+	* @param message Dialog content message
127	+	* @return {@code Optional.of(true)} if yes has been clicked;<br>
128	+	* {@code Optional.of(false)} if no has been clicked;<br>
129	+	* {@code Optional.empty()} otherwise
130	+	*/
131	+	public static Optional<Boolean> createYesOrNoOrCancelDialog(String title, String message) {
132	+	var alert = new Alert(AlertType.CONFIRMATION, message, ButtonType.YES, ButtonType.NO, ButtonType.CANCEL);
133	+	alert.setTitle(title);
134	+	alert.setHeaderText(title);
135	+	((Stage) alert.getDialogPane().getScene().getWindow()).getIcons().add(defaultIcon);
136	+
137	+	alert.showAndWait();
138	+
139	+	var result = alert.getResult();
140	+	if (result == ButtonType.YES) {
141	+	return Optional.of(Boolean.TRUE);
142	+	} else if (result == ButtonType.NO) {
143	+	return Optional.of(Boolean.FALSE);
144	+	}
145	+	return Optional.empty();
146	+	}
147	+
148	+	/**
149	+	* Creates simple yes / no dialog.
150	+	* @param title Dialog title
151	+	* @param message Dialog content message
152	+	* @return {@code true} if yes has been clicked;<br>
153	+	* {@code false} if no has been clicked
154	+	*/
155	+	public static boolean createYesOrNoDialog(String title, String message) {
156	+	var alert = new Alert(AlertType.CONFIRMATION, message, ButtonType.YES, ButtonType.NO);
157	+	alert.setTitle(title);
158	+	alert.setHeaderText(title);
159	+	((Stage) alert.getDialogPane().getScene().getWindow()).getIcons().add(defaultIcon);
160	+
161	+	alert.showAndWait();
162	+
163	+	return alert.getResult() == ButtonType.YES;
164	+	}
165	+
166	+	/**
167	+	* Creates simple text input dialog. (Empty default value.)
168	+	* @param title Dialog title
169	+	* @param message Dialog content message
170	+	* @return Entered value. (Empty optional if the dialog has been closed/canceled.]
171	+	*/
172	+	public static Optional<String> createTextInputDialog(String title, String message) {
173	+	return createTextInputDialog(title, message, "");
174	+	}
175	+
176	+	/**
177	+	* Creates simple text input dialog.
178	+	* @param title Dialog title
179	+	* @param message Dialog content message
180	+	* @param value Default input value
181	+	* @return Entered value. (Empty optional if the dialog has been closed/canceled.)
182	+	*/
183	+	public static Optional<String> createTextInputDialog(String title, String message, String value) {
184	+	var dialog = new TextInputDialog(value);
185	+	dialog.setTitle(title);
186	+	dialog.setHeaderText(title);
187	+	dialog.setContentText(message);
188	+
189	+	((Stage) dialog.getDialogPane().getScene().getWindow()).getIcons().add(defaultIcon);
190	+
191	+	return dialog.showAndWait();
192	+	}
193	+
194	+	/**
195	+	* Creates simple choice dialog.
196	+	* @param title Dialog title
197	+	* @param message Dialog content message
198	+	* @param choices Choices to display in dialog
199	+	* @param value Default selected choice
200	+	* @return Chosen value. (Empty optional if the dialog has been closed/canceled.)
201	+	*/
202	+	public static <T> Optional<T> createChoiceDialog(String title, String message, List<T> choices, T value) {
203	+	var dialog = new ChoiceDialog<>(value, choices);
204	+	dialog.setTitle(title);
205	+	dialog.setHeaderText(title);
206	+	dialog.setContentText(message);
207	+
208	+	((Stage) dialog.getDialogPane().getScene().getWindow()).getIcons().add(defaultIcon);
209	+
210	+	return dialog.showAndWait();
211	+	}
212	+
213	+	/**
214	+	* Creates simple choice dialog.
215	+	* @param title Dialog title
216	+	* @param message Dialog content message
217	+	* @param choices Choices to display in dialog
218	+	* @return Chosen value. (Empty optional if the dialog has been closed/canceled.)
219	+	*/
220	+	public static <T> Optional<T> createChoiceDialog(String title, String message, List<T> choices) {
221	+	return createChoiceDialog(title, message, choices, null);
222	+	}
223	+
224	+	/**
225	+	* Creates dialog for text pair input.
226	+	* <p>Lets user enter two string values.</p>
227	+	* @param title Dialog title
228	+	* @param firstLabel Label of first input
229	+	* @param secondLabel Label of second input
230	+	* @return Entered values. (Empty optional if the dialog has been closed/canceled.)
231	+	*/
232	+	public static Optional<Pair<String, String>> createTextPairDialog(
233	+	String title,
234	+	String firstLabel,
235	+	String secondLabel) {
236	+	return createTextPairDialog(title, firstLabel, secondLabel, "", "");
237	+	}
238	+
239	+	/**
240	+	* Creates dialog for text pair input with default values.
241	+	* <p>Lets user enter two string values.</p>
242	+	* @param title Dialog title
243	+	* @param firstLabel Label of first input
244	+	* @param secondLabel Label of second input
245	+	* @param firstValue Default value for first input
246	+	* @param secondValue Default value for second input
247	+	* @return Entered values. (Empty optional if the dialog has been closed/canceled.)
248	+	*/
249	+	public static Optional<Pair<String, String>> createTextPairDialog(
250	+	String title,
251	+	String firstLabel,
252	+	String secondLabel,
253	+	String firstValue,
254	+	String secondValue) {
255	+	var dialog = new Dialog<Pair<String, String>>();
256	+	dialog.setTitle(title);
257	+	dialog.setHeaderText(title);
258	+
259	+	((Stage) dialog.getDialogPane().getScene().getWindow()).getIcons().add(defaultIcon);
260	+
261	+	dialog.getDialogPane().getButtonTypes().addAll(ButtonType.OK, ButtonType.CANCEL);
262	+
263	+	var keyLabel = new Label(firstLabel);
264	+	var keyInput = new TextField(firstValue);
265	+	keyInput.setMaxWidth(Double.MAX_VALUE);
266	+
267	+	var valueLabel = new Label(secondLabel);
268	+	var valueInput = new TextField(secondValue);
269	+	valueInput.setMaxWidth(Double.MAX_VALUE);
270	+
271	+	var grid = new GridPane();
272	+	grid.setMaxWidth(Double.MAX_VALUE);
273	+	grid.setHgap(10);
274	+	grid.setVgap(10);
275	+	grid.setPadding(new Insets(20, 150, 10, 10));
276	+
277	+	grid.add(keyLabel, 0, 0);
278	+	grid.add(keyInput, 1, 0);
279	+	GridPane.setHgrow(keyInput, Priority.ALWAYS);
280	+
281	+	grid.add(valueLabel, 0, 1);
282	+	grid.add(valueInput, 1, 1);
283	+	GridPane.setHgrow(valueInput, Priority.ALWAYS);
284	+
285	+	dialog.getDialogPane().setContent(grid);
286	+
287	+	dialog.setResultConverter(buttonType -> {
288	+	if (buttonType == ButtonType.OK) {
289	+	return new Pair<>(keyInput.getText(), valueInput.getText());
290	+	}
291	+	return null;
292	+	});
293	+
294	+	return dialog.showAndWait();
295	+	}
296	+
297	+	private Dialogs() {}
298	+	}
299	+

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vucsa-client/src/main/java/com/warxim/vucsa/client/util/GuiUtils.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.client.util;
18	+
19	+	import javafx.scene.Node;
20	+	import javafx.scene.control.ScrollPane;
21	+	import javafx.scene.control.Tab;
22	+	import javafx.scene.control.TabPane;
23	+
24	+	/**
25	+	* GUI utils.
26	+	*/
27	+	public final class GuiUtils {
28	+	private GuiUtils() {
29	+	}
30	+
31	+	/**
32	+	* Adds tab(node) to specified tab pane using the specified order.
33	+	* (Wraps the node to a scroll pane, creates new tab and adds it to the tabPane.)
34	+	* @param tabPane Tab pane to which to add the tab
35	+	* @param title Text of the tab title
36	+	* @param node Content node, which will be a content of the tab
37	+	* @param order Order to use when adding the tab
38	+	* @return Created tab
39	+	*/
40	+	public static Tab addTabToTabPane(TabPane tabPane, String title, Node node, Integer order) {
41	+	var scrollPane = new ScrollPane(node);
42	+
43	+	scrollPane.setFitToHeight(true);
44	+	scrollPane.setFitToWidth(true);
45	+	var tab = new Tab(title, scrollPane);
46	+	tab.setUserData(order);
47	+
48	+	var tabs = tabPane.getTabs();
49	+	var index = 0;
50	+	for (; index < tabs.size(); ++index) {
51	+	var currentOrder = tabs.get(index).getUserData();
52	+	if (currentOrder == null \|\| (Integer) currentOrder > order) {
53	+	break;
54	+	}
55	+	}
56	+	tabPane.getTabs().add(index, tab);
57	+	return tab;
58	+	}
59	+
60	+	}
61	+

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vucsa-client/src/main/resources/css/Main.css

1	+	{
2	+	-fx-font-size: 12px;
3	+	-fx-color-background-light: #fff;
4	+	-fx-color-text-primary: #000;
5	+	-fx-fill: -fx-color-text-primary;
6	+	}
7	+
8	+	.h1,
9	+	.h1 .text {
10	+	-fx-font-size: 15px;
11	+	-fx-font-weight: 700;
12	+	}
13	+
14	+	.h2,
15	+	.h2 .text {
16	+	-fx-font-size: 14px;
17	+	-fx-font-weight: 700;
18	+	}
19	+
20	+	.h3,
21	+	.h3 .text {
22	+	-fx-font-size: 13px;
23	+	-fx-font-weight: 700;
24	+	}
25	+
26	+	.input-label {
27	+	-fx-font-weight: 700;
28	+	}
29	+
30	+
31	+	/*
32	+	LOG FLOW
33	+	*/
34	+
35	+	.log-flow {
36	+	-fx-padding: 5px;
37	+	-fx-border-style: solid;
38	+	-fx-border-width: 1;
39	+	-fx-background-color: -fx-color-background-light;
40	+	}
41	+
42	+	.log-flow .log-record:info {
43	+	-fx-fill: -fx-color-text-primary;
44	+	}
45	+
46	+	.log-flow .log-record:severe {
47	+	-fx-fill: #a93226;
48	+	}
49	+
50	+	.log-flow .log-record:warning {
51	+	-fx-fill: #CA6F1E;
52	+	}
53	+
54	+	.log-flow .log-record:fine {
55	+	-fx-fill: #229954;
56	+	}
57	+
58	+	.log-flow .log-record:other {
59	+	-fx-fill: #344051;
60	+	}
61	+
62	+	.log-flow .log-record:config {
63	+	-fx-fill: #2471A3;
64	+	}
65	+
66	+
67	+	/*
68	+	STATUS LABEL
69	+	*/
70	+
71	+	.status-connected,
72	+	.status-connected .text {
73	+	-fx-fill: #048b04;
74	+	}
75	+
76	+	.status-disconnected,
77	+	.status-disconnected .text {
78	+	-fx-fill: #970202;
79	+	}

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vucsa-client/src/main/resources/fxml/Application.fxml

1	+	<?xml version="1.0" encoding="UTF-8"?>
2	+
3	+	<?import javafx.scene.control.*?>
4	+	<?import javafx.scene.layout.*?>
5	+
6	+	<VBox maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="650" prefWidth="800" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1">
7	+	<children>
8	+	<MenuBar>
9	+	<menus>
10	+	<Menu mnemonicParsing="false" text="Application">
11	+	<items>
12	+	<MenuItem mnemonicParsing="false" onAction="#onExitMenuClick" text="Exit" />
13	+	</items>
14	+	</Menu>
15	+	<Menu mnemonicParsing="false" text="Help">
16	+	<items>
17	+	<MenuItem mnemonicParsing="false" onAction="#showAbout" text="About" />
18	+	</items>
19	+	</Menu>
20	+	</menus>
21	+	</MenuBar>
22	+	<AnchorPane prefHeight="423.0" prefWidth="698.0" VBox.vgrow="ALWAYS">
23	+	<children>
24	+	<TabPane fx:id="tabs" layoutY="7.0" prefHeight="400.0" prefWidth="600.0" tabClosingPolicy="UNAVAILABLE" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0" />
25	+	</children>
26	+	</AnchorPane>
27	+	</children>
28	+	</VBox>
29	+

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vucsa-client/src/main/resources/fxml/challenge/bufferoverread/BufferOverreadTab.fxml

1	+	<?xml version="1.0" encoding="UTF-8"?>
2	+
3	+	<?import javafx.scene.control.Button?>
4	+	<?import javafx.scene.control.Label?>
5	+	<?import javafx.scene.control.ListView?>
6	+	<?import javafx.scene.layout.AnchorPane?>
7	+	<?import javafx.scene.layout.VBox?>
8	+
9	+	<AnchorPane prefHeight="468.0" prefWidth="725.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1">
10	+	<children>
11	+	<Label layoutX="14.0" layoutY="14.0" styleClass="h1" text="Buffer over-read" AnchorPane.leftAnchor="10.0" AnchorPane.topAnchor="10.0" />
12	+	<Label layoutX="14.0" layoutY="14.0" text="This is a simulation of buffer over-read vulnerability. Find out how to cause buffer over-read by modifying the communication of the following mechanism. (Note: it works in both directions.)" AnchorPane.leftAnchor="10.0" AnchorPane.rightAnchor="10.0" AnchorPane.topAnchor="35.0" />
13	+	<VBox layoutX="10.0" layoutY="58.0" prefHeight="392.0" prefWidth="686.0" spacing="10.0" AnchorPane.bottomAnchor="10.0" AnchorPane.leftAnchor="10.0" AnchorPane.rightAnchor="10.0" AnchorPane.topAnchor="65.0">
14	+	<children>
15	+	<Label styleClass="input-label" text="Request:" />
16	+	<ListView fx:id="requestInput" prefHeight="410.0" prefWidth="248.0" />
17	+	<Label styleClass="input-label" text="Response:" />
18	+	<ListView fx:id="responseInput" prefHeight="410.0" prefWidth="248.0" />
19	+	</children>
20	+	</VBox>
21	+	<Button layoutX="635.0" layoutY="59.0" mnemonicParsing="false" onAction="#onSendClick" prefHeight="25.0" prefWidth="80.0" text="Send" AnchorPane.rightAnchor="10.0" AnchorPane.topAnchor="59.0" />
22	+	</children>
23	+	</AnchorPane>
24	+

■ ■ ■ ■ ■ ■

vucsa-client/src/main/resources/fxml/challenge/commandexecution/CommandExecutionTab.fxml

1	+	<?xml version="1.0" encoding="UTF-8"?>
2	+
3	+	<?import javafx.scene.control.Button?>
4	+	<?import javafx.scene.control.Label?>
5	+	<?import javafx.scene.control.TextArea?>
6	+	<?import javafx.scene.control.TextField?>
7	+	<?import javafx.scene.layout.AnchorPane?>
8	+
9	+	<AnchorPane prefHeight="468.0" prefWidth="725.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1">
10	+	<children>
11	+	<Label layoutX="14.0" layoutY="14.0" styleClass="h1" text="Command Execution" AnchorPane.leftAnchor="10.0" AnchorPane.topAnchor="10.0" />
12	+	<Label layoutX="14.0" layoutY="14.0" text="Try to exploit this simple command execution vulnerability!" AnchorPane.leftAnchor="10.0" AnchorPane.rightAnchor="10.0" AnchorPane.topAnchor="35.0" />
13	+	<Button layoutX="635.0" layoutY="59.0" mnemonicParsing="false" onAction="#onPingClick" prefHeight="25.0" prefWidth="80.0" text="Ping" AnchorPane.rightAnchor="10.0" AnchorPane.topAnchor="59.0" />
14	+	<TextField fx:id="hostInput" layoutX="67.0" layoutY="59.0" prefHeight="25.0" prefWidth="562.0" AnchorPane.leftAnchor="65.0" AnchorPane.rightAnchor="96.0" />
15	+	<Label layoutX="10.0" layoutY="63.0" styleClass="input-label" text="Ping:" AnchorPane.leftAnchor="10.0" AnchorPane.topAnchor="63.0" />
16	+	<TextArea fx:id="resultOutput" editable="false" layoutX="14.0" layoutY="90.0" prefHeight="200.0" prefWidth="200.0" AnchorPane.bottomAnchor="10.0" AnchorPane.leftAnchor="10.0" AnchorPane.rightAnchor="10.0" AnchorPane.topAnchor="90.0" />
17	+	</children>
18	+	</AnchorPane>
19	+

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vucsa-client/src/main/resources/fxml/challenge/enumeration/EnumerationTab.fxml

1	+	<?xml version="1.0" encoding="UTF-8"?>
2	+
3	+	<?import javafx.scene.control.Button?>
4	+	<?import javafx.scene.control.Label?>
5	+	<?import javafx.scene.control.PasswordField?>
6	+	<?import javafx.scene.control.TextField?>
7	+	<?import javafx.scene.layout.AnchorPane?>
8	+
9	+	<AnchorPane prefHeight="468.0" prefWidth="725.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1">
10	+	<children>
11	+	<Label layoutX="14.0" layoutY="14.0" styleClass="h1" text="Enumeration" AnchorPane.leftAnchor="10.0" AnchorPane.topAnchor="10.0" />
12	+	<Label layoutX="14.0" layoutY="14.0" text="The login form is vulnerable to user enumeration and password brute-force attacks. Can find all 5 accounts? Can you automate it using external HTTP proxy?" AnchorPane.leftAnchor="10.0" AnchorPane.rightAnchor="10.0" AnchorPane.topAnchor="35.0" />
13	+	<Button layoutX="200.0" layoutY="176.0" minWidth="80.0" mnemonicParsing="false" onAction="#onLoginClick" prefHeight="25.0" prefWidth="321.0" text="Login" AnchorPane.leftAnchor="200.0" AnchorPane.rightAnchor="200.0" AnchorPane.topAnchor="176.0" />
14	+	<Label alignment="CENTER" layoutX="10.0" layoutY="68.0" styleClass="input-label" text="Username" textAlignment="CENTER" AnchorPane.leftAnchor="10.0" AnchorPane.rightAnchor="10.0" />
15	+	<Label alignment="CENTER" layoutX="10.0" layoutY="121.0" styleClass="input-label" text="Password" textAlignment="CENTER" AnchorPane.leftAnchor="10.0" AnchorPane.rightAnchor="10.0" AnchorPane.topAnchor="121.0" />
16	+	<TextField fx:id="usernameInput" alignment="CENTER" layoutX="200.0" layoutY="91.0" AnchorPane.leftAnchor="200.0" AnchorPane.rightAnchor="200.0" AnchorPane.topAnchor="91.0" />
17	+	<PasswordField fx:id="passwordInput" alignment="CENTER" layoutX="200.0" layoutY="144.0" prefHeight="25.0" prefWidth="325.0" AnchorPane.leftAnchor="200.0" AnchorPane.rightAnchor="200.0" />
18	+	<Label alignment="CENTER" contentDisplay="CENTER" layoutX="49.0" layoutY="246.0" prefHeight="17.0" prefWidth="626.0" styleClass="input-label" text="Result" textAlignment="CENTER" AnchorPane.leftAnchor="10.0" AnchorPane.rightAnchor="10.0" />
19	+	<Label fx:id="resultLabel" alignment="CENTER" contentDisplay="CENTER" layoutX="10.0" layoutY="268.0" prefHeight="17.0" prefWidth="626.0" text="-" textAlignment="CENTER" AnchorPane.leftAnchor="10.0" AnchorPane.rightAnchor="10.0" />
20	+	</children>
21	+	</AnchorPane>
22	+

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vucsa-client/src/main/resources/fxml/challenge/horizontalaccesscontrol/HorizontalAccessControlTab.fxml

1	+	<?xml version="1.0" encoding="UTF-8"?>
2	+
3	+	<?import javafx.scene.control.Label?>
4	+	<?import javafx.scene.control.ListView?>
5	+	<?import javafx.scene.control.TextArea?>
6	+	<?import javafx.scene.layout.AnchorPane?>
7	+	<?import javafx.scene.layout.VBox?>
8	+
9	+	<AnchorPane prefHeight="468.0" prefWidth="725.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1">
10	+	<children>
11	+	<Label layoutX="14.0" layoutY="14.0" styleClass="h1" text="Horizontal Access Control Vulnerability" AnchorPane.leftAnchor="10.0" AnchorPane.topAnchor="10.0" />
12	+	<Label layoutX="14.0" layoutY="14.0" text="Imagine that you are logged in as a user and you have the following GUI accessible. Try to find a way to obtain documents of other users." AnchorPane.leftAnchor="10.0" AnchorPane.rightAnchor="10.0" AnchorPane.topAnchor="35.0" />
13	+	<VBox layoutX="10.0" layoutY="58.0" prefHeight="392.0" prefWidth="686.0" spacing="10.0" AnchorPane.bottomAnchor="10.0" AnchorPane.leftAnchor="10.0" AnchorPane.rightAnchor="10.0" AnchorPane.topAnchor="65.0">
14	+	<children>
15	+	<Label styleClass="input-label" text="Your documents (select to display text content):" />
16	+	<ListView fx:id="documentInput" prefHeight="410.0" prefWidth="248.0" />
17	+	<Label styleClass="input-label" text="Content:" />
18	+	<TextArea fx:id="contentOutput" prefHeight="410.0" prefWidth="705.0" VBox.vgrow="ALWAYS" />
19	+	</children>
20	+	</VBox>
21	+	</children>
22	+	</AnchorPane>
23	+

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vucsa-client/src/main/resources/fxml/challenge/sqlinjection/SqlInjectionTab.fxml

1	+	<?xml version="1.0" encoding="UTF-8"?>
2	+
3	+	<?import javafx.scene.control.Button?>
4	+	<?import javafx.scene.control.Label?>
5	+	<?import javafx.scene.control.TableColumn?>
6	+	<?import javafx.scene.control.TableView?>
7	+	<?import javafx.scene.control.TextField?>
8	+	<?import javafx.scene.layout.AnchorPane?>
9	+
10	+	<AnchorPane prefHeight="468.0" prefWidth="725.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1">
11	+	<children>
12	+	<Label layoutX="14.0" layoutY="14.0" styleClass="h1" text="SQL Injection" AnchorPane.leftAnchor="10.0" AnchorPane.topAnchor="10.0" />
13	+	<Label layoutX="14.0" layoutY="14.0" text="The following functionality is vulnerable to SQL injection! Try exploiting it and loading list of users." AnchorPane.leftAnchor="10.0" AnchorPane.rightAnchor="10.0" AnchorPane.topAnchor="35.0" />
14	+	<Button layoutX="635.0" layoutY="59.0" mnemonicParsing="false" onAction="#onSearchClick" prefHeight="25.0" prefWidth="80.0" text="Search" AnchorPane.rightAnchor="10.0" AnchorPane.topAnchor="59.0" />
15	+	<TextField fx:id="searchInput" layoutX="67.0" layoutY="59.0" prefHeight="25.0" prefWidth="562.0" AnchorPane.leftAnchor="65.0" AnchorPane.rightAnchor="96.0" />
16	+	<Label layoutX="10.0" layoutY="63.0" styleClass="input-label" text="Search:" AnchorPane.leftAnchor="10.0" AnchorPane.topAnchor="63.0" />
17	+	<TableView fx:id="resultTable" layoutX="10.0" layoutY="91.0" prefHeight="370.0" prefWidth="705.0" AnchorPane.bottomAnchor="10.0" AnchorPane.leftAnchor="10.0" AnchorPane.rightAnchor="10.0" AnchorPane.topAnchor="90.0">
18	+	<columns>
19	+	<TableColumn fx:id="idColumn" prefWidth="75.0" text="Number" />
20	+	<TableColumn fx:id="nameColumn" prefWidth="75.0" text="Name" />
21	+	<TableColumn fx:id="descriptionColumn" prefWidth="230.0" text="Description" />
22	+	<TableColumn fx:id="priceColumn" prefWidth="121.0" text="Price" />
23	+	</columns>
24	+	<columnResizePolicy>
25	+	<TableView fx:constant="CONSTRAINED_RESIZE_POLICY" />
26	+	</columnResizePolicy>
27	+	</TableView>
28	+	</children>
29	+	</AnchorPane>
30	+

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vucsa-client/src/main/resources/fxml/challenge/verticalaccesscontrol/VerticalAccessControlTab.fxml

1	+	<?xml version="1.0" encoding="UTF-8"?>
2	+
3	+	<?import javafx.scene.control.Button?>
4	+	<?import javafx.scene.control.Label?>
5	+	<?import javafx.scene.layout.AnchorPane?>
6	+
7	+	<AnchorPane prefHeight="468.0" prefWidth="725.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1">
8	+	<children>
9	+	<Label layoutX="14.0" layoutY="14.0" styleClass="h1" text="Vertical Access Control Vulnerability" AnchorPane.leftAnchor="10.0" AnchorPane.topAnchor="10.0" />
10	+	<Label layoutX="14.0" layoutY="14.0" text="Find a way to change your application role by modifying communication and use a secret function, which is only available for admins." AnchorPane.leftAnchor="10.0" AnchorPane.rightAnchor="10.0" AnchorPane.topAnchor="35.0" />
11	+	<Button layoutX="377.0" layoutY="59.0" mnemonicParsing="false" onAction="#onRefreshClick" prefHeight="25.0" prefWidth="80.0" text="Refresh" AnchorPane.leftAnchor="377.0" AnchorPane.topAnchor="59.0" />
12	+	<Label layoutX="10.0" layoutY="63.0" styleClass="input-label" text="Username:" AnchorPane.leftAnchor="10.0" AnchorPane.topAnchor="63.0" />
13	+	<Label fx:id="usernameLabel" layoutX="76.0" layoutY="63.0" text="-" AnchorPane.leftAnchor="85.0" AnchorPane.topAnchor="63.0" />
14	+	<Label layoutX="208.0" layoutY="63.0" styleClass="input-label" text="Role:" AnchorPane.leftAnchor="208.0" AnchorPane.topAnchor="63.0" />
15	+	<Label fx:id="roleLabel" layoutX="246.0" layoutY="63.0" text="-" AnchorPane.leftAnchor="250.0" AnchorPane.topAnchor="63.0" />
16	+	<AnchorPane fx:id="guestPane" layoutX="6.0" layoutY="84.0" prefHeight="200.0" prefWidth="200.0" visible="false" AnchorPane.bottomAnchor="10.0" AnchorPane.leftAnchor="10.0" AnchorPane.rightAnchor="10.0" AnchorPane.topAnchor="90.0">
17	+	<children>
18	+	<Label layoutY="6.0" text="You cannot do anything, because you are a GUEST!" AnchorPane.leftAnchor="0.0" AnchorPane.topAnchor="0.0" />
19	+	</children>
20	+	</AnchorPane>
21	+	<AnchorPane fx:id="userPane" layoutX="16.0" layoutY="94.0" prefHeight="200.0" prefWidth="200.0" visible="false" AnchorPane.bottomAnchor="10.0" AnchorPane.leftAnchor="10.0" AnchorPane.rightAnchor="10.0" AnchorPane.topAnchor="90.0">
22	+	<children>
23	+	<Label layoutY="6.0" text="Hello user! How was your day? We are working hard on implementing more functionality for you..." AnchorPane.leftAnchor="0.0" AnchorPane.topAnchor="0.0" />
24	+	</children>
25	+	</AnchorPane>
26	+	<AnchorPane fx:id="adminPane" layoutX="26.0" layoutY="104.0" prefHeight="200.0" prefWidth="200.0" visible="false" AnchorPane.bottomAnchor="10.0" AnchorPane.leftAnchor="10.0" AnchorPane.rightAnchor="10.0" AnchorPane.topAnchor="90.0">
27	+	<children>
28	+	<Label layoutY="6.0" text="Welcome administrator!" AnchorPane.leftAnchor="0.0" AnchorPane.topAnchor="0.0" />
29	+	<Label layoutX="-4.0" layoutY="58.0" text="Secret:" AnchorPane.leftAnchor="0.0" />
30	+	<Button layoutX="2.0" layoutY="26.0" mnemonicParsing="false" onAction="#onDownloadSecretClick" text="Download Secret" AnchorPane.leftAnchor="10.0" />
31	+	<Label fx:id="secretLabel" layoutX="46.0" layoutY="58.0" text="-" />
32	+	</children>
33	+	</AnchorPane>
34	+	</children>
35	+	</AnchorPane>
36	+

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vucsa-client/src/main/resources/fxml/challenge/xml/XmlTab.fxml

1	+	<?xml version="1.0" encoding="UTF-8"?>
2	+
3	+	<?import javafx.scene.control.Button?>
4	+	<?import javafx.scene.control.Label?>
5	+	<?import javafx.scene.control.TableColumn?>
6	+	<?import javafx.scene.control.TableView?>
7	+	<?import javafx.scene.layout.AnchorPane?>
8	+	<?import javafx.scene.layout.VBox?>
9	+
10	+	<AnchorPane prefHeight="468.0" prefWidth="725.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1">
11	+	<children>
12	+	<Label layoutX="14.0" layoutY="14.0" styleClass="h1" text="XML Vulnerabilities" AnchorPane.leftAnchor="10.0" AnchorPane.topAnchor="10.0" />
13	+	<Label layoutX="14.0" layoutY="14.0" text="You can try multiple XML vulnerabilities here. For example, try to load some system file using XML entities or xi:include." AnchorPane.leftAnchor="10.0" AnchorPane.rightAnchor="10.0" AnchorPane.topAnchor="35.0" />
14	+	<VBox layoutX="10.0" layoutY="58.0" prefHeight="392.0" prefWidth="686.0" spacing="10.0" AnchorPane.bottomAnchor="10.0" AnchorPane.leftAnchor="10.0" AnchorPane.rightAnchor="10.0" AnchorPane.topAnchor="65.0">
15	+	<children>
16	+	<Label styleClass="input-label" text="Storage request:" />
17	+	<TableView fx:id="requestTable" prefHeight="200.0" prefWidth="200.0" VBox.vgrow="ALWAYS">
18	+	<columns>
19	+	<TableColumn fx:id="requestKeyColumn" prefWidth="75.0" text="Storage Key" />
20	+	<TableColumn fx:id="requestValueColumn" prefWidth="75.0" text="Storage Value" />
21	+	</columns>
22	+	<columnResizePolicy>
23	+	<TableView fx:constant="CONSTRAINED_RESIZE_POLICY" />
24	+	</columnResizePolicy>
25	+	</TableView>
26	+	<Label styleClass="input-label" text="Storage response:" />
27	+	<TableView fx:id="responseTable" prefHeight="200.0" prefWidth="200.0" VBox.vgrow="ALWAYS">
28	+	<columns>
29	+	<TableColumn fx:id="responseKeyColumn" prefWidth="75.0" text="Storage Key" />
30	+	<TableColumn fx:id="responseValueColumn" prefWidth="75.0" text="Storage Value" />
31	+	</columns>
32	+	<columnResizePolicy>
33	+	<TableView fx:constant="CONSTRAINED_RESIZE_POLICY" />
34	+	</columnResizePolicy>
35	+	</TableView>
36	+	</children>
37	+	</VBox>
38	+	<Button layoutX="635.0" layoutY="59.0" mnemonicParsing="false" onAction="#onSendClick" prefHeight="25.0" prefWidth="80.0" text="Save" AnchorPane.rightAnchor="10.0" AnchorPane.topAnchor="59.0" />
39	+	</children>
40	+	</AnchorPane>
41	+

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vucsa-client/src/main/resources/fxml/tab/LogTab.fxml

1	+	<?xml version="1.0" encoding="UTF-8"?>
2	+
3	+	<?import javafx.scene.control.ScrollPane?>
4	+	<?import javafx.scene.layout.*?>
5	+	<?import javafx.scene.text.TextFlow?>
6	+
7	+	<AnchorPane xmlns="http://javafx.com/javafx/10.0.1" xmlns:fx="http://javafx.com/fxml/1">
8	+	<children>
9	+	<ScrollPane fx:id="scrollPane" fitToHeight="true" fitToWidth="true" layoutX="10.0" layoutY="10.0" vvalue="1.0" AnchorPane.bottomAnchor="10.0" AnchorPane.leftAnchor="10.0" AnchorPane.rightAnchor="10.0" AnchorPane.topAnchor="10.0">
10	+	<content>
11	+	<TextFlow fx:id="logFlow" styleClass="log-flow" />
12	+	</content>
13	+	</ScrollPane>
14	+	</children>
15	+	</AnchorPane>
16	+

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vucsa-client/src/main/resources/fxml/tab/SettingsTab.fxml

1	+	<?xml version="1.0" encoding="UTF-8"?>
2	+
3	+	<?import javafx.scene.control.Button?>
4	+	<?import javafx.scene.control.Label?>
5	+	<?import javafx.scene.control.TextField?>
6	+	<?import javafx.scene.layout.AnchorPane?>
7	+
8	+	<AnchorPane prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1">
9	+	<children>
10	+	<Label layoutX="10.0" layoutY="168.0" styleClass="h2" text="Connection Settings" AnchorPane.leftAnchor="10.0" AnchorPane.topAnchor="168.0" />
11	+	<Label layoutX="14.0" layoutY="14.0" styleClass="h1" text="Settings" AnchorPane.leftAnchor="10.0" AnchorPane.topAnchor="10.0" />
12	+	<Label layoutX="10.0" layoutY="218.0" styleClass="input-label" text="Server IP:" AnchorPane.leftAnchor="10.0" AnchorPane.topAnchor="218.0" />
13	+	<TextField fx:id="serverHostInput" layoutX="100.0" layoutY="214.0" prefHeight="25.0" prefWidth="250.0" AnchorPane.leftAnchor="100.0" AnchorPane.topAnchor="214.0" />
14	+	<Label layoutX="10.0" layoutY="36.0" text="In this tab you can configure the application and the connection to the vulnerable test server." />
15	+	<Label layoutX="10.0" layoutY="190.0" text="Settings of the connection to the vulnerable test server." />
16	+	<Label layoutX="10.0" layoutY="248.0" styleClass="input-label" text="Server port:" AnchorPane.topAnchor="248.0" />
17	+	<TextField fx:id="serverPortInput" layoutX="100.0" layoutY="244.0" prefHeight="25.0" prefWidth="250.0" AnchorPane.leftAnchor="100.0" AnchorPane.topAnchor="244.0" />
18	+	<Label layoutX="10.0" layoutY="63.0" styleClass="h2" text="Status" AnchorPane.leftAnchor="10.0" AnchorPane.topAnchor="65.0" />
19	+	<Label layoutX="10.0" layoutY="87.0" styleClass="input-label" text="Status:" AnchorPane.leftAnchor="10.0" AnchorPane.topAnchor="87.0" />
20	+	<Label layoutX="10.0" layoutY="112.0" styleClass="input-label" text="Server Host:" AnchorPane.topAnchor="112.0" />
21	+	<Label layoutX="10.0" layoutY="137.0" styleClass="input-label" text="Server Port:" AnchorPane.leftAnchor="10.0" AnchorPane.topAnchor="137.0" />
22	+	<Label fx:id="statusLabel" layoutX="100.0" layoutY="87.0" text="-" />
23	+	<Label fx:id="serverHostLabel" layoutX="100.0" layoutY="112.0" text="-" />
24	+	<Label fx:id="serverPortLabel" layoutX="100.0" layoutY="137.0" text="-" />
25	+	<Button fx:id="startStopButton" layoutX="210.0" layoutY="83.0" mnemonicParsing="false" onAction="#onStartStopClick" prefHeight="25.0" prefWidth="107.0" text="CONNECT" />
26	+	</children>
27	+	</AnchorPane>
28	+

vucsa-client/src/main/resources/img/Logo.png

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vucsa-common/build.gradle

1	+	plugins {
2	+	id 'java'
3	+	}
4	+
5	+	group 'com.warxim'
6	+	version '1.0'
7	+
8	+	repositories {
9	+	mavenCentral()
10	+	}
11	+
12	+	dependencies {
13	+	compileOnly 'org.projectlombok:lombok:1.18.24'
14	+	annotationProcessor 'org.projectlombok:lombok:1.18.24'
15	+	implementation 'com.google.code.gson:gson:2.9.0'
16	+
17	+	testImplementation 'org.testng:testng:7.6.0'
18	+	testImplementation 'org.assertj:assertj-core:3.23.1'
19	+	testImplementation 'org.mockito:mockito-inline:4.6.1'
20	+	}
21	+
22	+	test {
23	+	useTestNG()
24	+	}
25	+

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vucsa-common/src/main/java/com/warxim/vucsa/common/ChallengeConstant.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.common;
18	+
19	+	/**
20	+	* Constants for challenges.
21	+	*/
22	+	public final class ChallengeConstant {
23	+	public static final int BUFFER_OVERREAD_TARGET = 1001;
24	+	public static final int SQL_INJECTION_TARGET = 1002;
25	+	public static final int ENUMERATION_TARGET = 1003;
26	+	public static final int COMMAND_EXECUTION_TARGET = 1004;
27	+	public static final int XML_TARGET = 1005;
28	+	public static final int VERTICAL_ACCESS_CONTROL_USER_INFO_TARGET = 1006;
29	+	public static final int VERTICAL_ACCESS_CONTROL_SECRET_TARGET = 1007;
30	+	public static final int HORIZONTAL_ACCESS_CONTROL_DOCUMENT_CONTENT_TARGET = 1008;
31	+
32	+	public static final String CHALLENGES_DIRECTORY = "server/challenge/";
33	+
34	+	private ChallengeConstant() {}
35	+	}
36	+

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vucsa-common/src/main/java/com/warxim/vucsa/common/Constant.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.common;
18	+
19	+	/**
20	+	* Global constants.
21	+	*/
22	+	public final class Constant {
23	+	public static final String VERSION = "1.0.0";
24	+	public static final String WEB = "http://vucsa.warxim.com";
25	+
26	+	public static final String DEFAULT_SERVER_HOST = "127.0.0.1";
27	+	public static final int DEFAULT_SERVER_PORT = 8765;
28	+
29	+	public static final String SERVER_CONFIG_PATH = "server.json";
30	+
31	+	private Constant() {}
32	+	}
33	+

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vucsa-common/src/main/java/com/warxim/vucsa/common/connection/Connection.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.common.connection;
18	+
19	+	import com.warxim.vucsa.common.message.MessageHandler;
20	+	import com.warxim.vucsa.common.connection.listener.ConnectionListener;
21	+	import com.warxim.vucsa.common.message.Message;
22	+	import com.warxim.vucsa.common.message.MessageQueue;
23	+	import com.warxim.vucsa.common.util.MessageUtils;
24	+	import lombok.RequiredArgsConstructor;
25	+
26	+	import java.io.DataInputStream;
27	+	import java.io.EOFException;
28	+	import java.io.IOException;
29	+	import java.net.Socket;
30	+	import java.net.SocketException;
31	+	import java.util.concurrent.ExecutorService;
32	+	import java.util.concurrent.Executors;
33	+	import java.util.concurrent.atomic.AtomicBoolean;
34	+	import java.util.logging.Level;
35	+	import java.util.logging.Logger;
36	+
37	+	/**
38	+	* Connection representing single connection between client and server.
39	+	* <p>Implementation has to set socket.</p>
40	+	*/
41	+	@RequiredArgsConstructor
42	+	public abstract class Connection {
43	+	/**
44	+	* Connection identifier.
45	+	*/
46	+	protected final int id;
47	+
48	+	/**
49	+	* Connection listener for reporting connection start/stop events.
50	+	*/
51	+	protected final ConnectionListener listener;
52	+
53	+	/**
54	+	* Message handler for handling messages, which the connection read from the input stream.
55	+	*/
56	+	protected final MessageHandler messageHandler;
57	+
58	+	/**
59	+	* Executor service for running read and write threads.
60	+	*/
61	+	protected final ExecutorService executor = Executors.newFixedThreadPool(2);
62	+
63	+	/**
64	+	* Flag determining if the connection is already in closing state or not.
65	+	*/
66	+	protected final AtomicBoolean closing = new AtomicBoolean(false);
67	+
68	+	/**
69	+	* Queue for message, which the connection will send using the output stream.
70	+	*/
71	+	protected final MessageQueue outgoingQueue = new MessageQueue();
72	+
73	+	/**
74	+	* Connection socket, which has to be provided by the implementation.
75	+	*/
76	+	protected Socket socket;
77	+
78	+	/**
79	+	* Connection state.
80	+	*/
81	+	protected ConnectionState state;
82	+
83	+	/**
84	+	* Starts the connection.
85	+	* <p>If the start fails, it is automatically stopped.</p>
86	+	*/
87	+	public void start() {
88	+	Logger.getGlobal().info("Starting connection...");
89	+	state = ConnectionState.STARTING;
90	+	if (!handleBeforeStart()) {
91	+	stop();
92	+	}
93	+
94	+	executor.execute(this::doRead);
95	+	executor.execute(this::doWrite);
96	+	executor.execute(this::stop);
97	+
98	+	if (!handleAfterStart()) {
99	+	stop();
100	+	}
101	+	state = ConnectionState.STARTED;
102	+	Logger.getGlobal().info("Connection started.");
103	+
104	+	listener.onConnectionStart(this);
105	+	}
106	+
107	+	/**
108	+	* Stops the connection.
109	+	*/
110	+	public void stop() {
111	+	if (!closing.compareAndSet(false, true)) {
112	+	return;
113	+	}
114	+
115	+	Logger.getGlobal().info("Stopping connection...");
116	+	state = ConnectionState.STOPPING;
117	+	handleBeforeStop();
118	+
119	+	executor.shutdownNow();
120	+	if (socket != null) {
121	+	try {
122	+	socket.close();
123	+	} catch (IOException e) {
124	+	Logger.getGlobal().log(Level.SEVERE, "Could not close connection socket.", e);
125	+	}
126	+	}
127	+
128	+	state = ConnectionState.STOPPED;
129	+	handleAfterStop();
130	+	Logger.getGlobal().info("Connection stopped.");
131	+
132	+	listener.onConnectionStop(this);
133	+	}
134	+
135	+	/**
136	+	* Sends message using the socket.
137	+	* @param message Message to be sent
138	+	*/
139	+	public void sendMessage(Message message) {
140	+	this.outgoingQueue.add(message);
141	+	}
142	+
143	+	/**
144	+	* Obtains connection state.
145	+	* @return Connection state
146	+	*/
147	+	public ConnectionState getState() {
148	+	return state;
149	+	}
150	+
151	+	/**
152	+	* Obtains connection identifier.
153	+	* @return Connection identifier
154	+	*/
155	+	public int getId() {
156	+	return id;
157	+	}
158	+
159	+	/**
160	+	* Runs before the connection starts.
161	+	* @return {@code true} if everything went well; {@code false} if the connection should be stopped
162	+	*/
163	+	protected boolean handleBeforeStart() {
164	+	return true;
165	+	}
166	+
167	+	/**
168	+	* Runs after the connection starts.
169	+	* @return {@code true} if everything went well; {@code false} if the connection should be stopped
170	+	*/
171	+	protected boolean handleAfterStart() {
172	+	return true;
173	+	}
174	+
175	+	/**
176	+	* Runs before the connection stops.
177	+	*/
178	+	protected void handleBeforeStop() {}
179	+
180	+	/**
181	+	* Runs after the connection stops.
182	+	*/
183	+	protected void handleAfterStop() {}
184	+
185	+	/**
186	+	* Reads messages from input stream and sends them to the handler.
187	+	*/
188	+	private void doRead() {
189	+	try (var in = new DataInputStream(socket.getInputStream())) {
190	+	while (!closing.get()) {
191	+	var maybeMessage = MessageUtils.readMessageFromInputStream(in);
192	+	if (maybeMessage.isEmpty()) {
193	+	continue;
194	+	}
195	+	var message = maybeMessage.get();
196	+	if (messageHandler.supports(message)) {
197	+	messageHandler.handleMessage(this, message);
198	+	}
199	+	}
200	+	} catch (SocketException \| EOFException e) {
201	+	// Connection closed
202	+	} catch (IOException e) {
203	+	Logger.getGlobal().log(Level.SEVERE, "IO exception occurred durring connection read.", e);
204	+	}
205	+	}
206	+
207	+	/**
208	+	* Gets messages from outgoing queue and sends them using output stream.
209	+	*/
210	+	private void doWrite() {
211	+	try (var out = socket.getOutputStream()) {
212	+	Message message;
213	+	while (!closing.get() && (message = outgoingQueue.take()) != null) {
214	+	MessageUtils.writeMessageToOutputStream(message, out);
215	+	}
216	+	} catch (SocketException e) {
217	+	// Connection closed
218	+	} catch (IOException e) {
219	+	Logger.getGlobal().log(Level.SEVERE, "IO exception occurred durring connection write.", e);
220	+	} catch (InterruptedException e) {
221	+	// Interrupted
222	+	Thread.currentThread().interrupt();
223	+	}
224	+	}
225	+	}
226	+

■ ■ ■ ■ ■ ■

vucsa-common/src/main/java/com/warxim/vucsa/common/connection/ConnectionState.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.common.connection;
18	+
19	+	/**
20	+	* State of connection.
21	+	*/
22	+	public enum ConnectionState {
23	+	/**
24	+	* Connection is starting
25	+	*/
26	+	STARTING,
27	+	/**
28	+	* Connection is running
29	+	*/
30	+	STARTED,
31	+	/**
32	+	* Connection is stopping
33	+	*/
34	+	STOPPING,
35	+	/**
36	+	* Connection is offline
37	+	*/
38	+	STOPPED
39	+	}
40	+

■ ■ ■ ■ ■ ■

vucsa-common/src/main/java/com/warxim/vucsa/common/connection/listener/ConnectionListener.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.common.connection.listener;
18	+
19	+	import com.warxim.vucsa.common.connection.Connection;
20	+
21	+	/**
22	+	* ConnectionListener allows code to listen for connection start/stop events.
23	+	* <p>
24	+	* All event handlers should be called from ConnectionManager.
25	+	* </p>
26	+	*/
27	+	public interface ConnectionListener {
28	+	/**
29	+	* Event for connection start.
30	+	* @param connection Connection that started
31	+	*/
32	+	default void onConnectionStart(Connection connection) {}
33	+
34	+	/**
35	+	* Event for connection stop.
36	+	* @param connection Connection that stopped
37	+	*/
38	+	default void onConnectionStop(Connection connection) {}
39	+	}
40	+

■ ■ ■ ■ ■ ■

vucsa-common/src/main/java/com/warxim/vucsa/common/connection/listener/ConnectionListenerManager.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.common.connection.listener;
18	+
19	+	import com.warxim.vucsa.common.connection.Connection;
20	+	import com.warxim.vucsa.common.listener.ListenerManager;
21	+
22	+	/**
23	+	* Listener manager that allows modules to register their own listener (aggregates listeners).
24	+	* <p>Based on {@link ListenerManager}</p>
25	+	*/
26	+	public final class ConnectionListenerManager extends ListenerManager<ConnectionListener> implements ConnectionListener {
27	+	@Override
28	+	public void onConnectionStart(Connection connection) {
29	+	parallelCall(listener -> listener.onConnectionStart(connection));
30	+	}
31	+
32	+	@Override
33	+	public void onConnectionStop(Connection connection) {
34	+	parallelCall(listener -> listener.onConnectionStop(connection));
35	+	}
36	+	}

■ ■ ■ ■ ■ ■

vucsa-common/src/main/java/com/warxim/vucsa/common/listener/ListenerManager.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.common.listener;
18	+
19	+	import java.lang.ref.WeakReference;
20	+	import java.util.concurrent.CopyOnWriteArrayList;
21	+	import java.util.function.Consumer;
22	+
23	+	/**
24	+	* Listener Manager for managing multiple listeners.
25	+	* <p>
26	+	* Uses WeakReference, so that the listener resources are automatically freed,
27	+	* when the reference becomes weakly reachable.
28	+	* (To prevent leaks caused by forgotten unregister call.)
29	+	* </p>
30	+	* <p>
31	+	* Listeners have to be stored as strong reference.
32	+	* </p>
33	+	*/
34	+	public class ListenerManager<L> {
35	+	protected final CopyOnWriteArrayList<WeakReference<L>> listeners;
36	+
37	+	public ListenerManager() {
38	+	listeners = new CopyOnWriteArrayList<>();
39	+	}
40	+
41	+	/**
42	+	* Register listener
43	+	* <p>Stores weak reference to the listener.</p>
44	+	* @param listener Listener to be registered
45	+	*/
46	+	public void registerListener(L listener) {
47	+	listeners.add(new WeakReference<>(listener));
48	+	}
49	+
50	+	/**
51	+	* Unregister listener
52	+	* <p>Removes listener weak reference from the manager.</p>
53	+	* @param listener Listener to be unregistered
54	+	*/
55	+	public void unregisterListener(L listener) {
56	+	listeners.removeIf(reference -> listener.equals(reference.get()));
57	+	}
58	+
59	+	/**
60	+	* Call the specified consumer for all listeners
61	+	* <p>
62	+	* Calls {@link Consumer#accept(Object)} for each listener (listener as a parameter).
63	+	* </p>
64	+	* @param consumer Consumer for handling the listener call
65	+	*/
66	+	protected void call(Consumer<L> consumer) {
67	+	listeners.forEach(reference -> callListener(reference, consumer));
68	+	}
69	+
70	+	/**
71	+	* Call the specified consumer for all listeners in parallel
72	+	* <p>
73	+	* Calls {@link Consumer#accept(Object)} for each listener (listener as a parameter) using parallel stream.
74	+	* </p>
75	+	* @param consumer Consumer for handling the listener call
76	+	*/
77	+	protected void parallelCall(Consumer<L> consumer) {
78	+	listeners.parallelStream().forEach(reference -> callListener(reference, consumer));
79	+	}
80	+
81	+	/**
82	+	* Removes all listeners.
83	+	*/
84	+	public void clear() {
85	+	listeners.clear();
86	+	}
87	+
88	+	/**
89	+	* Call the consumer with the listener as parameter (if it is still referenced)
90	+	* <p>Removes the listener reference from listeners, if it does not exist.</p>
91	+	* @param reference Listener reference
92	+	* @param consumer Consumer for handling the listener call
93	+	*/
94	+	private void callListener(WeakReference<L> reference, Consumer<L> consumer) {
95	+	var listener = reference.get();
96	+	if (listener == null) {
97	+	listeners.remove(reference);
98	+	return;
99	+	}
100	+	consumer.accept(listener);
101	+	}
102	+	}
103	+

■ ■ ■ ■ ■ ■

vucsa-common/src/main/java/com/warxim/vucsa/common/message/Message.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.common.message;
18	+
19	+	import lombok.EqualsAndHashCode;
20	+	import lombok.Getter;
21	+	import lombok.RequiredArgsConstructor;
22	+
23	+	/**
24	+	* Message base class.
25	+	* <p>
26	+	* Message is a protocol data unit in vulnerable application.
27	+	* </p>
28	+	*/
29	+	@EqualsAndHashCode
30	+	@Getter
31	+	@RequiredArgsConstructor
32	+	public abstract class Message {
33	+	/**
34	+	* Identifier of target handler.
35	+	*/
36	+	private final int target;
37	+
38	+	/**
39	+	* Obtains type of the message.
40	+	* @return Message type
41	+	*/
42	+	public abstract MessageType getType();
43	+	}
44	+

■ ■ ■ ■ ■ ■

vucsa-common/src/main/java/com/warxim/vucsa/common/message/MessageDeserializer.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.common.message;
18	+
19	+	import java.util.Optional;
20	+
21	+	/**
22	+	* Message deserializer for deserializing bytes into specific message object.
23	+	*/
24	+	public interface MessageDeserializer {
25	+	/**
26	+	* Deserializes serialized message into specific message object.
27	+	* @param serializedMessage Serialized message to be deserialized
28	+	* @return Message or empty optional if the deserialization failed
29	+	*/
30	+	Optional<Message> deserializeMessage(SerializedMessage serializedMessage);
31	+	}
32	+

■ ■ ■ ■ ■ ■

vucsa-common/src/main/java/com/warxim/vucsa/common/message/MessageHandler.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.common.message;
18	+
19	+	import com.warxim.vucsa.common.connection.Connection;
20	+
21	+	/**
22	+	* Endpoint for handling messages.
23	+	* <p>Represents "endpoint" for messages.</p>
24	+	*/
25	+	public interface MessageHandler {
26	+	/**
27	+	* Checks whether the given message is supported by the handler.
28	+	* @param message Message to be checked
29	+	* @return {@code true} if the message is supported
30	+	*/
31	+	boolean supports(Message message);
32	+
33	+	/**
34	+	* Handles message in the handler
35	+	* @param connection Connection, which sent the message
36	+	* @param message Message to be handled
37	+	* @return {@code true} if the message has been correctly handled
38	+	*/
39	+	boolean handleMessage(Connection connection, Message message);
40	+	}
41	+

■ ■ ■ ■ ■ ■

vucsa-common/src/main/java/com/warxim/vucsa/common/message/MessageHandlerManager.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.common.message;
18	+
19	+	import com.warxim.vucsa.common.connection.Connection;
20	+	import lombok.RequiredArgsConstructor;
21	+
22	+	import java.util.concurrent.ConcurrentHashMap;
23	+	import java.util.logging.Logger;
24	+
25	+	/**
26	+	* Message handler manager aggregates message managers registered for specific target identifiers.
27	+	*/
28	+	@RequiredArgsConstructor
29	+	public class MessageHandlerManager implements MessageHandler {
30	+	/**
31	+	* Handlers registered for certain message target.
32	+	*/
33	+	private final ConcurrentHashMap<Integer, MessageHandler> handlers = new ConcurrentHashMap<>();
34	+
35	+	/**
36	+	* Registers message handler.
37	+	* @param target Target identifier of the handler
38	+	* @param messageHandler Handler to be registered
39	+	*/
40	+	public void registerHandler(int target, MessageHandler messageHandler) {
41	+	this.handlers.putIfAbsent(target, messageHandler);
42	+	}
43	+
44	+	/**
45	+	* Unregisters message handler.
46	+	* @param target Target identifier of the handler
47	+	*/
48	+	public void unregisterHandler(int target) {
49	+	this.handlers.remove(target);
50	+	}
51	+
52	+	@Override
53	+	public boolean supports(Message message) {
54	+	return true;
55	+	}
56	+
57	+	@Override
58	+	public boolean handleMessage(Connection connection, Message message) {
59	+	var target = message.getTarget();
60	+	var handler = this.handlers.get(target);
61	+	if (handler == null) {
62	+	Logger.getGlobal().severe(() -> String.format("No handler found with id [%d]...", target));
63	+	return false;
64	+	}
65	+
66	+	if (!handler.supports(message)) {
67	+	Logger.getGlobal().severe(() -> String.format("Handler [%d] does not support message! Ignoring message...", target));
68	+	return false;
69	+	}
70	+
71	+	return handler.handleMessage(connection, message);
72	+	}
73	+	}
74	+

■ ■ ■ ■ ■ ■

vucsa-common/src/main/java/com/warxim/vucsa/common/message/MessageQueue.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.common.message;
18	+
19	+	import java.util.Optional;
20	+	import java.util.concurrent.BlockingQueue;
21	+	import java.util.concurrent.LinkedBlockingQueue;
22	+
23	+	/**
24	+	* Queue of messages.
25	+	*/
26	+	public class MessageQueue {
27	+	private final BlockingQueue<Message> queue;
28	+
29	+	public MessageQueue() {
30	+	queue = new LinkedBlockingQueue<>();
31	+	}
32	+
33	+	/**
34	+	* Add message to queue.
35	+	* @param message Message to be added to the queue
36	+	*/
37	+	public void add(Message message) {
38	+	queue.add(message);
39	+	}
40	+
41	+	/**
42	+	* Returns message from queue (blocks until there is message).
43	+	* @return Message from queue
44	+	*/
45	+	public Message take() throws InterruptedException {
46	+	return queue.take();
47	+	}
48	+
49	+	/**
50	+	* Retrieves and removes the head of the queue.
51	+	* @return Message from queue or empty optional if the queue is empty
52	+	*/
53	+	public Optional<Message> poll() {
54	+	return Optional.ofNullable(queue.poll());
55	+	}
56	+
57	+	/**
58	+	* Get queue size.
59	+	* @return Size of the queue
60	+	*/
61	+	public int size() {
62	+	return queue.size();
63	+	}
64	+
65	+	/**
66	+	* Clears queue.
67	+	*/
68	+	public void clear() {
69	+	queue.clear();
70	+	}
71	+
72	+	/**
73	+	* Checks if the queue is empty.
74	+	* @return {@code true} if the queue is empty
75	+	*/
76	+	public boolean isEmpty() {
77	+	return queue.isEmpty();
78	+	}
79	+	}
80	+

■ ■ ■ ■ ■ ■

vucsa-common/src/main/java/com/warxim/vucsa/common/message/MessageSerializer.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.common.message;
18	+
19	+	import java.util.Optional;
20	+
21	+	/**
22	+	* Message serializer for serializing message into bytes.
23	+	*/
24	+	public interface MessageSerializer {
25	+	/**
26	+	* Serializes message into deserialized message.
27	+	* @param message Message to be serialized
28	+	* @return Serialized message or empty optional if the serialization failed
29	+	*/
30	+	Optional<SerializedMessage> serializeMessage(Message message);
31	+	}
32	+

■ ■ ■ ■ ■ ■

vucsa-common/src/main/java/com/warxim/vucsa/common/message/MessageType.java

1	+	/*
2	+	* Vulnerable Client-Server Application (VuCSA)
3	+	*
4	+	* Copyright (C) 2021 Michal Válka
5	+	*
6	+	* This program is free software: you can redistribute it and/or modify it under the terms of the
7	+	* GNU General Public License as published by the Free Software Foundation, either version 3 of the
8	+	* License, or (at your option) any later version.
9	+	*
10	+	* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
11	+	* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	+	* General Public License for more details.
13	+	*
14	+	* You should have received a copy of the GNU General Public License along with this program. If
15	+	* not, see <https://www.gnu.org/licenses/>.
16	+	*/
17	+	package com.warxim.vucsa.common.message;
18	+
19	+	import com.warxim.vucsa.common.message.commandexecution.request.PingRequestDeserializer;
20	+	import com.warxim.vucsa.common.message.commandexecution.response.PingResponseDeserializer;
21	+	import com.warxim.vucsa.common.message.commandexecution.response.PingResponseSerializer;
22	+	import com.warxim.vucsa.common.message.horizontalaccesscontrol.request.DocumentContentRequest;
23	+	import com.warxim.vucsa.common.message.horizontalaccesscontrol.response.DocumentContentResponse;
24	+	import com.warxim.vucsa.common.message.sqlinjection.response.SearchResponseDeserializer;
25	+	import com.warxim.vucsa.common.message.verticalaccesscontrol.request.*;
26	+	import com.warxim.vucsa.common.message.verticalaccesscontrol.response.*;
27	+	import com.warxim.vucsa.common.message.bufferoverread.StringListMessageDeserializer;
28	+	import com.warxim.vucsa.common.message.bufferoverread.StringListMessageSerializer;
29	+	import com.warxim.vucsa.common.message.bufferoverread.StringListMessage;
30	+	import com.warxim.vucsa.common.message.commandexecution.request.PingRequest;
31	+	import com.warxim.vucsa.common.message.commandexecution.request.PingRequestSerializer;
32	+	import com.warxim.vucsa.common.message.commandexecution.response.PingResponse;
33	+	import com.warxim.vucsa.common.message.enumeration.request.LoginRequest;
34	+	import com.warxim.vucsa.common.message.enumeration.request.LoginRequestDeserializer;
35	+	import com.warxim.vucsa.common.message.enumeration.request.LoginRequestSerializer;
36	+	import com.warxim.vucsa.common.message.enumeration.response.LoginResponse;
37	+	import com.warxim.vucsa.common.message.enumeration.response.LoginResponseDeserializer;
38	+	import com.warxim.vucsa.common.message.enumeration.response.LoginResponseSerializer;
39	+	import com.warxim.vucsa.common.message.horizontalaccesscontrol.request.DocumentContentRequestDeserializer;
40	+	import com.warxim.vucsa.common.message.horizontalaccesscontrol.request.DocumentContentRequestSerializer;
41	+	import com.warxim.vucsa.common.message.horizontalaccesscontrol.response.DocumentContentResponseDeserializer;
42	+	import com.warxim.vucsa.common.message.horizontalaccesscontrol.response.DocumentContentResponseSerializer;
43	+	import com.warxim.vucsa.common.message.plain.PlainMessage;
44	+	import com.warxim.vucsa.common.message.plain.PlainMessageDeserializer;
45	+	import com.warxim.vucsa.common.message.plain.PlainMessageSerializer;
46	+	import com.warxim.vucsa.common.message.sqlinjection.request.SearchRequest;
47	+	import com.warxim.vucsa.common.message.sqlinjection.request.SearchRequestDeserializer;
48	+	import com.warxim.vucsa.common.message.sqlinjection.request.SearchRequestSerializer;
49	+	import com.warxim.vucsa.common.message.sqlinjection.response.SearchResponse;
50	+	import com.warxim.vucsa.common.message.sqlinjection.response.SearchResponseSerializer;
51	+	import com.warxim.vucsa.common.message.verticalaccesscontrol.request.*;
52	+	import com.warxim.vucsa.common.message.verticalaccesscontrol.response.*;
53	+	import com.warxim.vucsa.common.message.xml.StorageMessage;
54	+	import com.warxim.vucsa.common.message.xml.StorageMessageDeserializer;
55	+	import com.warxim.vucsa.common.message.xml.StorageMessageSerializer;
56	+	import lombok.Getter;
57	+	import lombok.RequiredArgsConstructor;
58	+
59	+	import java.util.Arrays;
60	+	import java.util.Optional;
61	+
62	+	/**
63	+	* Message type.
64	+	*/
65	+	@Getter
66	+	@RequiredArgsConstructor
67	+	public enum MessageType {
68	+	PLAIN(1, PlainMessage.class, new PlainMessageSerializer(), new PlainMessageDeserializer()),
69	+	BUFFER_OVERREAD_STRING_LIST_MESSAGE(2, StringListMessage.class, new StringListMessageSerializer(), new StringListMessageDeserializer()),
70	+	SQL_INJECTION_SEARCH_REQUEST(3, SearchRequest.class, new SearchRequestSerializer(), new SearchRequestDeserializer()),
71	+	SQL_INJECTION_SEARCH_RESPONSE(4, SearchResponse.class, new SearchResponseSerializer(), new SearchResponseDeserializer()),
72	+	ENUMERATION_CHALLENGE_LOGIN_REQUEST(5, LoginRequest.class, new LoginRequestSerializer(), new LoginRequestDeserializer()),
73	+	ENUMERATION_CHALLENGE_LOGIN_RESPONSE(6, LoginResponse.class, new LoginResponseSerializer(), new LoginResponseDeserializer()),
74	+	COMMAND_EXECUTION_PING_REQUEST(7, PingRequest.class, new PingRequestSerializer(), new PingRequestDeserializer()),
75	+	COMMAND_EXECUTION_PING_RESPONSE(8, PingResponse.class, new PingResponseSerializer(), new PingResponseDeserializer()),
76	+	XML_STORAGE_MESSAGE(9, StorageMessage.class, new StorageMessageSerializer(), new StorageMessageDeserializer()),
77	+	VERTICAL_ACCESS_CONTROL_USER_INFO_REQUEST(10, UserInfoRequest.class, new UserInfoRequestSerializer(), new UserInfoRequestDeserializer()),
78	+	VERTICAL_ACCESS_CONTROL_USER_INFO_RESPONSE(11, UserInfoResponse.class, new UserInfoResponseSerializer(), new UserInfoResponseDeserializer()),
79	+	VERTICAL_ACCESS_CONTROL_SECRET_REQUEST(12, SecretRequest.class, new SecretRequestSerializer(), new SecretRequestDeserializer()),
80	+	VERTICAL_ACCESS_CONTROL_SECRET_RESPONSE(13, SecretResponse.class, new SecretResponseSerializer(), new SecretResponseDeserializer()),
81	+	HORIZONTAL_ACCESS_CONTROL_DOCUMENT_CONTENT_REQUEST(14, DocumentContentRequest.class, new DocumentContentRequestSerializer(), new DocumentContentRequestDeserializer()),
82	+	HORIZONTAL_ACCESS_CONTROL_DOCUMENT_CONTENT_RESPONSE(15, DocumentContentResponse.class, new DocumentContentResponseSerializer(), new DocumentContentResponseDeserializer()),
83	+	;
84	+
85	+	/**
86	+	* Serialized value of message type (unique).
87	+	*/
88	+	private final int value;
89	+
90	+	/**
91	+	* Class representing the message.
92	+	*/
93	+	private final Class<? extends Message> clazz;
94	+
95	+	/**
96	+	* Serializer for serializing given message type.
97	+	*/
98	+	private final MessageSerializer serializer;
99	+
100	+	/**
101	+	* Deserializer for deserializing given message type.
102	+	*/
103	+	private final MessageDeserializer deserializer;
104	+
105	+	/**
106	+	* Converts serialized message type to enum message type.
107	+	* @return Message type or empty optional if message for given type was not found
108	+	*/
109	+	public static Optional<MessageType> of(int value) {
110	+	return Arrays.stream(values())
111	+	.filter(type -> type.getValue() == value)
112	+	.findAny();
113	+	}
114	+
115	+	}
116	+

Vulnerable client-server application (VuCSA) 1.0