├── .github
└── workflows
│ └── build.yml
├── .gitignore
├── .vscode
└── settings.json
├── ChatClient
├── App.xaml
├── App.xaml.cs
├── AssemblyInfo.cs
├── ChatClient.csproj
├── FingerPrint.xaml
├── FingerPrint.xaml.cs
├── MainWindow.xaml
├── MainWindow.xaml.cs
├── Model
│ └── Persistent.cs
├── Properties
│ ├── Settings.Designer.cs
│ └── Settings.settings
└── Visual
│ └── Colors.cs
├── ChatServer
├── ChatServer.csproj
├── ClientMgr.cs
└── Program.cs
├── Common
├── Cipher
│ ├── AES256GCM.cs
│ ├── ECDH.cs
│ └── X509.cs
├── Common.projitems
├── Common.shproj
├── Log
│ └── Logger.cs
└── Network
│ ├── Data
│ └── Message.cs
│ ├── Multicast.cs
│ ├── NetClient.cs
│ ├── NetServer.cs
│ ├── NetUtils.cs
│ └── Transport
│ ├── ITransport.cs
│ └── TCPTransport.cs
├── LICENSE
├── PROTOCOL.md
├── README.md
├── SimpleSecureChat.sln
└── docs
└── banner.jpg
/.github/workflows/build.yml:
--------------------------------------------------------------------------------
1 | name: SSCBuild
2 |
3 | on:
4 | push:
5 | tags:
6 | - "v*"
7 | pull_request:
8 | types: [review_requested]
9 |
10 | jobs:
11 | build:
12 | runs-on: windows-latest
13 | steps:
14 | - uses: actions/checkout@v2
15 | - uses: microsoft/setup-msbuild@v1.1
16 |
17 | - name: Nuget restore
18 | run: nuget restore
19 |
20 | - name: Build client
21 | run: msbuild /t:ChatClient:publish /p:Configuration=Release /p:TargetFramework=net6.0-windows /p:RuntimeIdentifier=win10-x64 /p:SelfContained=false /verbosity:minimal
22 | - name: Build server
23 | run: msbuild /t:ChatServer:publish /p:Configuration=Release /p:TargetFramework=net6.0-windows /p:RuntimeIdentifier=win10-x64 /p:SelfContained=false /verbosity:minimal
24 |
25 | - name: Archive client
26 | uses: thedoctor0/zip-release@0.6.2
27 | with:
28 | type: zip
29 | filename: ssc_client-net6.0-windows.zip
30 | path: ChatClient/bin/Release/net6.0-windows/win10-x64/publish
31 | - name: Archive server
32 | uses: thedoctor0/zip-release@0.6.2
33 | with:
34 | filename: ssc_server-net6.0-windows.zip
35 | path: ChatServer/bin/Release/net6.0-windows/win10-x64/publish
36 |
37 | - name: Client artifact
38 | uses: actions/upload-artifact@v2
39 | with:
40 | name: client-net6.0-windows
41 | path: ssc_client-net6.0-windows.zip
42 | - name: Server artifact
43 | uses: actions/upload-artifact@v2
44 | with:
45 | name: server-net6.0-windows
46 | path: ssc_server-net6.0-windows.zip
47 |
48 | - name: Release
49 | if: startsWith(github.ref, 'refs/tags/')
50 | uses: softprops/action-gh-release@v1
51 | with:
52 | draft: false
53 | prerelease: false
54 | files: |
55 | ssc_client-net6.0-windows.zip
56 | ssc_server-net6.0-windows.zip
--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
1 | ## Ignore Visual Studio temporary files, build results, and
2 | ## files generated by popular Visual Studio add-ons.
3 |
4 | # User-specific files
5 | *.suo
6 | *.user
7 | *.userosscache
8 | *.sln.docstates
9 |
10 | # User-specific files (MonoDevelop/Xamarin Studio)
11 | *.userprefs
12 |
13 | # Build results
14 | [Dd]ebug/
15 | [Dd]ebugPublic/
16 | [Rr]elease/
17 | [Rr]eleases/
18 | x64/
19 | x86/
20 | build/
21 | bld/
22 | [Bb]in/
23 | [Oo]bj/
24 |
25 | # Visual Studo 2015 cache/options directory
26 | .vs/
27 |
28 | # MSTest test Results
29 | [Tt]est[Rr]esult*/
30 | [Bb]uild[Ll]og.*
31 |
32 | # NUNIT
33 | *.VisualState.xml
34 | TestResult.xml
35 |
36 | # Build Results of an ATL Project
37 | [Dd]ebugPS/
38 | [Rr]eleasePS/
39 | dlldata.c
40 |
41 | *_i.c
42 | *_p.c
43 | *_i.h
44 | *.ilk
45 | *.meta
46 | *.obj
47 | *.pch
48 | *.pdb
49 | *.pgc
50 | *.pgd
51 | *.rsp
52 | *.sbr
53 | *.tlb
54 | *.tli
55 | *.tlh
56 | *.tmp
57 | *.tmp_proj
58 | *.log
59 | *.vspscc
60 | *.vssscc
61 | .builds
62 | *.pidb
63 | *.svclog
64 | *.scc
65 |
66 | # Chutzpah Test files
67 | _Chutzpah*
68 |
69 | # Visual C++ cache files
70 | ipch/
71 | *.aps
72 | *.ncb
73 | *.opensdf
74 | *.sdf
75 | *.cachefile
76 |
77 | # Visual Studio profiler
78 | *.psess
79 | *.vsp
80 | *.vspx
81 |
82 | # TFS 2012 Local Workspace
83 | $tf/
84 |
85 | # Guidance Automation Toolkit
86 | *.gpState
87 |
88 | # ReSharper is a .NET coding add-in
89 | _ReSharper*/
90 | *.[Rr]e[Ss]harper
91 | *.DotSettings.user
92 |
93 | # JustCode is a .NET coding addin-in
94 | .JustCode
95 |
96 | # TeamCity is a build add-in
97 | _TeamCity*
98 |
99 | # DotCover is a Code Coverage Tool
100 | *.dotCover
101 |
102 | # NCrunch
103 | _NCrunch_*
104 | .*crunch*.local.xml
105 |
106 | # MightyMoose
107 | *.mm.*
108 | AutoTest.Net/
109 |
110 | # Web workbench (sass)
111 | .sass-cache/
112 |
113 | # Installshield output folder
114 | [Ee]xpress/
115 |
116 | # DocProject is a documentation generator add-in
117 | DocProject/buildhelp/
118 | DocProject/Help/*.HxT
119 | DocProject/Help/*.HxC
120 | DocProject/Help/*.hhc
121 | DocProject/Help/*.hhk
122 | DocProject/Help/*.hhp
123 | DocProject/Help/Html2
124 | DocProject/Help/html
125 |
126 | # Click-Once directory
127 | publish/
128 |
129 | # Publish Web Output
130 | *.[Pp]ublish.xml
131 | *.azurePubxml
132 | # TODO: Comment the next line if you want to checkin your web deploy settings
133 | # but database connection strings (with potential passwords) will be unencrypted
134 | *.pubxml
135 | *.publishproj
136 |
137 | # NuGet Packages
138 | *.nupkg
139 | # The packages folder can be ignored because of Package Restore
140 | **/packages/*
141 | # except build/, which is used as an MSBuild target.
142 | !**/packages/build/
143 | # Uncomment if necessary however generally it will be regenerated when needed
144 | #!**/packages/repositories.config
145 |
146 | # Windows Azure Build Output
147 | csx/
148 | *.build.csdef
149 |
150 | # Windows Store app package directory
151 | AppPackages/
152 |
153 | # Others
154 | *.[Cc]ache
155 | ClientBin/
156 | [Ss]tyle[Cc]op.*
157 | ~$*
158 | *~
159 | *.dbmdl
160 | *.dbproj.schemaview
161 | *.pfx
162 | *.publishsettings
163 | node_modules/
164 | bower_components/
165 |
166 | # RIA/Silverlight projects
167 | Generated_Code/
168 |
169 | # Backup & report files from converting an old project file
170 | # to a newer Visual Studio version. Backup files are not needed,
171 | # because we have git ;-)
172 | _UpgradeReport_Files/
173 | Backup*/
174 | UpgradeLog*.XML
175 | UpgradeLog*.htm
176 |
177 | # SQL Server files
178 | *.mdf
179 | *.ldf
180 |
181 | # Business Intelligence projects
182 | *.rdl.data
183 | *.bim.layout
184 | *.bim_*.settings
185 |
186 | # Microsoft Fakes
187 | FakesAssemblies/
188 |
189 | # Node.js Tools for Visual Studio
190 | .ntvs_analysis.dat
191 |
192 | # Visual Studio 6 build log
193 | *.plg
194 |
195 | # Visual Studio 6 workspace options file
196 | *.opt
197 |
--------------------------------------------------------------------------------
/.vscode/settings.json:
--------------------------------------------------------------------------------
1 | {
2 | "yaml.schemas": {
3 | "https://json.schemastore.org/github-workflow.json": "file:///d%3A/projects/SimpleSecureChat/.github/workflows/build.yml"
4 | }
5 | }
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/ChatClient/App.xaml:
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1 |
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198 |
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/ChatClient/App.xaml.cs:
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1 | using System;
2 | using System.Collections.Generic;
3 | using System.Configuration;
4 | using System.Data;
5 | using System.Linq;
6 | using System.Threading.Tasks;
7 | using System.Windows;
8 |
9 | namespace ChatClient
10 | {
11 | ///
12 | /// Interaction logic for App.xaml
13 | ///
14 | public partial class App : Application
15 | {
16 | }
17 | }
18 |
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/ChatClient/AssemblyInfo.cs:
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1 | using System.Windows;
2 |
3 | [assembly: ThemeInfo(
4 | ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
5 | //(used if a resource is not found in the page,
6 | // or application resource dictionaries)
7 | ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
8 | //(used if a resource is not found in the page,
9 | // app, or any theme specific resource dictionaries)
10 | )]
11 |
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/ChatClient/ChatClient.csproj:
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1 |
2 |
3 |
4 | WinExe
5 | net6.0-windows
6 | win10-x64
7 | enable
8 | true
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 | Code
21 |
22 |
23 | True
24 | True
25 | Settings.settings
26 |
27 |
28 |
29 |
30 |
31 | SettingsSingleFileGenerator
32 | Settings.Designer.cs
33 |
34 |
35 |
36 |
37 |
38 | Designer
39 | MSBuild:Compile
40 |
41 |
42 |
43 |
44 |
45 |
46 |
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/ChatClient/FingerPrint.xaml:
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/ChatClient/FingerPrint.xaml.cs:
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1 | using Common.Cipher;
2 | using System;
3 | using System.Collections.Generic;
4 | using System.Linq;
5 | using System.Security.Cryptography.X509Certificates;
6 | using System.Text;
7 | using System.Threading.Tasks;
8 | using System.Windows;
9 | using System.Windows.Controls;
10 | using System.Windows.Data;
11 | using System.Windows.Documents;
12 | using System.Windows.Input;
13 | using System.Windows.Media;
14 | using System.Windows.Media.Imaging;
15 | using System.Windows.Shapes;
16 |
17 | namespace ChatClient
18 | {
19 | ///
20 | /// FingerPrint.xaml 的交互逻辑
21 | ///
22 | public partial class FingerPrint : Window
23 | {
24 | public enum TrustResult
25 | {
26 | Cancel,
27 | TrustOnce,
28 | Trust
29 | }
30 | public TrustResult trustResult = TrustResult.Cancel;
31 |
32 | public FingerPrint(Window parent, X509Certificate2 cert)
33 | {
34 | Owner = parent;
35 | InitializeComponent();
36 | fingerPrintHexLabel.Content = cert.GetCertHashString();
37 | }
38 |
39 | private void Trust_Click(object sender, RoutedEventArgs e)
40 | {
41 | trustResult = TrustResult.Trust;
42 | Close();
43 | }
44 |
45 | private void TrustOnce_Click(object sender, RoutedEventArgs e)
46 | {
47 | trustResult = TrustResult.TrustOnce;
48 | Close();
49 | }
50 |
51 | private void Cancel_Click(object sender, RoutedEventArgs e)
52 | {
53 | trustResult = TrustResult.Cancel;
54 | Close();
55 | }
56 |
57 | private void Window_MouseDown(object sender, MouseButtonEventArgs e)
58 | {
59 | if (e.LeftButton == MouseButtonState.Pressed)
60 | {
61 | this.DragMove();
62 | }
63 | }
64 | }
65 | }
66 |
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/ChatClient/MainWindow.xaml:
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24 |
25 |
26 |
27 |
28 |
29 |
30 |
31 |
32 |
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/ChatClient/MainWindow.xaml.cs:
--------------------------------------------------------------------------------
1 | using ChatClient;
2 | using ChatClient.Model;
3 | using ChatClient.Visual;
4 | using Common.Cipher;
5 | using Common.Network;
6 | using Common.Network.Data;
7 | using SQLite;
8 | using System;
9 | using System.Diagnostics;
10 | using System.IO;
11 | using System.Linq;
12 | using System.Net;
13 | using System.Net.Sockets;
14 | using System.Runtime.InteropServices;
15 | using System.Security.Cryptography.X509Certificates;
16 | using System.Text;
17 | using System.Threading;
18 | using System.Threading.Tasks;
19 | using System.Windows;
20 | using System.Windows.Documents;
21 | using System.Windows.Input;
22 | using System.Windows.Interop;
23 |
24 | namespace SSC_Client
25 | {
26 | ///
27 | /// Interaction logic for MainWindow.xaml
28 | ///
29 | public partial class MainWindow : Window
30 | {
31 | NetClient m_net;
32 | string m_nick = "";
33 |
34 | UIState m_UIState;
35 | IntPtr m_wpfHwnd;
36 |
37 | SQLiteConnection m_db;
38 |
39 | readonly string m_WndTitle = "Simple Secure Chat";
40 |
41 | public enum UIState
42 | {
43 | Idle,
44 | Connected,
45 | Disconnecting,
46 | Connecting
47 | }
48 |
49 |
50 | #region Events
51 | public MainWindow()
52 | {
53 | InitializeComponent();
54 | }
55 |
56 | private void Window_MouseDown(object sender, MouseButtonEventArgs e)
57 | {
58 | if (e.LeftButton == MouseButtonState.Pressed)
59 | {
60 | this.DragMove();
61 | }
62 | }
63 |
64 | private void MinimizeButton_Click(object sender, RoutedEventArgs e)
65 | {
66 | this.WindowState = WindowState.Minimized;
67 | }
68 |
69 | private void CloseButton_Click(object sender, RoutedEventArgs e)
70 | {
71 | this.Hide();
72 | Environment.Exit(0);
73 | }
74 |
75 | private void messageArea_TextChanged(object sender, System.Windows.Controls.TextChangedEventArgs e)
76 | {
77 | this.messageArea.ScrollToEnd();
78 | }
79 |
80 | private void Window_Loaded(object sender, RoutedEventArgs e)
81 | {
82 | //flash notice init
83 | WindowInteropHelper wndHelper = new(this);
84 | m_wpfHwnd = wndHelper.Handle;
85 |
86 | //UI reset
87 | SetUI(UIState.Idle);
88 | ClearMessageArea();
89 |
90 | //db init
91 | m_db = new SQLiteConnection("trusted.db");
92 | m_db.CreateTable();
93 | }
94 |
95 | private void SendButton_Click(object sender, RoutedEventArgs e)
96 | {
97 | Sendmsg();
98 | }
99 |
100 | private void SaveButton_Click(object sender, RoutedEventArgs e)
101 | {
102 | try
103 | {
104 | Console.WriteLine(System.Windows.Markup.XamlWriter.Save(messageArea.Document));
105 | FileStream fs = new(Environment.GetFolderPath(Environment.SpecialFolder.Desktop) + "\\ChatLog_" + DateTime.Now.ToString("yyyy-MM-dd_hh-mm-ss") + ".html", FileMode.Append);
106 |
107 | StreamWriter sw = new(fs, Encoding.UTF8);
108 | sw.Write(System.Windows.Markup.XamlWriter.Save(messageArea.Document).Replace("", ""));
109 | sw.Close();
110 | fs.Close();
111 | AddStatus("Chat log saved to Desktop");
112 | }
113 | catch (Exception)
114 | {
115 | AddStatus("Chat log save failed");
116 | }
117 |
118 | }
119 |
120 | private void SendBox_PreviewKeyDown(object sender, KeyEventArgs e)
121 | {
122 | if (Keyboard.Modifiers == ModifierKeys.None && e.Key == Key.Enter)
123 | {
124 | e.Handled = true;
125 | Sendmsg();
126 | sendBox.Text = "";
127 | }
128 |
129 | if (Keyboard.Modifiers == ModifierKeys.Control && e.Key == Key.Enter)
130 | {
131 | e.Handled = true;
132 | sendBox.SelectedText = Environment.NewLine;
133 | sendBox.Select(sendBox.SelectionStart + 1, 0);
134 | }
135 | }
136 |
137 | private void ConnectButton_Click(object sender, RoutedEventArgs e)
138 | {
139 | //Disconnect
140 | if (m_UIState == UIState.Connected)
141 | {
142 | DoDisconnect(autoIdle: false);
143 | return;
144 | }
145 |
146 | //Connect
147 | string host;
148 | int port;
149 | try
150 | {
151 | NetUtils.Resolve(HostBox.Text);
152 | host = HostBox.Text;
153 | port = NetUtils.ResolvePort(PortBox.Text);
154 | }
155 | catch (Exception)
156 | {
157 | AddStatus("Invalid Host or Port");
158 | return;
159 | }
160 | if (KeyBox.Text.Length == 0)
161 | {
162 | AddStatus("Key is empty");
163 | return;
164 | }
165 |
166 | m_nick = NickBox.Text.Trim();
167 | if (m_nick == "")
168 | {
169 | AddStatus("Nick is empty");
170 | return;
171 | }
172 |
173 | //Go
174 | DoConnect(host, port);
175 | }
176 |
177 | #endregion
178 |
179 | #region UI Helper
180 | public void ClearMessageArea()
181 | {
182 | messageArea.Document.Blocks.Clear();
183 | }
184 | public void SetSendUI(bool enabled)
185 | {
186 | this.Dispatcher.Invoke(new Action(() =>
187 | {
188 | SendButton.IsEnabled = enabled;
189 | sendBox.IsEnabled = enabled;
190 | }));
191 | }
192 |
193 | public void SetUI(UIState flag)
194 | {
195 | m_UIState = flag;
196 | this.Dispatcher.Invoke(new Action(() =>
197 | {
198 | switch (flag)
199 | {
200 | case UIState.Idle:
201 | //Title
202 | TitleTextBlock.Text = m_WndTitle;
203 |
204 | //UI
205 | ConnectButton.Content = "Connect";
206 | ConnectButton.IsEnabled = true;
207 |
208 | HostBox.IsEnabled = true;
209 | PortBox.IsEnabled = true;
210 | NickBox.IsEnabled = true;
211 | KeyBox.IsEnabled = true;
212 |
213 | messageArea.Width = sendBox.Width = 460;
214 | ConnectButton.Margin = new Thickness(479, 275, 0, 0);
215 |
216 | SetSendUI(false);
217 |
218 | break;
219 | case UIState.Connected:
220 | //Title
221 | TitleTextBlock.Text = string.Format("{0} @ {1} : {2}", m_nick, HostBox.Text, PortBox.Text);
222 |
223 | //UI
224 | ConnectButton.Content = "Disconnect";
225 | ConnectButton.IsEnabled = true;
226 |
227 | HostBox.IsEnabled = false;
228 | PortBox.IsEnabled = false;
229 | NickBox.IsEnabled = false;
230 | KeyBox.IsEnabled = false;
231 |
232 | messageArea.Width = 660;
233 | sendBox.Width = 660;
234 | ConnectButton.Margin = new Thickness(479, 435, 0, 0);
235 |
236 | SetSendUI(true);
237 |
238 | break;
239 | case UIState.Connecting:
240 | case UIState.Disconnecting:
241 | ConnectButton.Content = "Wait...";
242 | ConnectButton.IsEnabled = false;
243 |
244 | HostBox.IsEnabled = false;
245 | PortBox.IsEnabled = false;
246 | NickBox.IsEnabled = false;
247 | KeyBox.IsEnabled = false;
248 |
249 | SetSendUI(false);
250 | break;
251 | default:
252 | throw new NotImplementedException("Unknown UI State");
253 | }
254 | }));
255 | }
256 |
257 | public void AddMessage(string name, string msg, bool self = false)
258 | {
259 | //@ detect
260 | bool at = false;
261 | if (msg.Contains("@" + m_nick))
262 | {
263 | at = true;
264 | }
265 |
266 | //Add to message area
267 | this.Dispatcher.Invoke(new Action(() =>
268 | {
269 |
270 | Run fl = new(string.Format("{0} {1}", name, DateTime.Now.ToString("hh:mm:ss")));
271 | Run r = new(msg);
272 |
273 | if (self)
274 | {
275 | //add Name part
276 | Paragraph paragraph = new();
277 | paragraph.Margin = new Thickness(3, 6, 0, 3);
278 | paragraph.Foreground = Colors.Green;
279 | paragraph.Inlines.Add(fl);
280 | messageArea.Document.Blocks.Add(paragraph);
281 |
282 | //add msg part
283 | paragraph = new();
284 | paragraph.Margin = new Thickness(3, 0, 0, 6);
285 | paragraph.Inlines.Add(r);
286 | messageArea.Document.Blocks.Add(paragraph);
287 | }
288 | else
289 | {
290 | //add Name part
291 | Paragraph paragraph = new();
292 | paragraph.Margin = new Thickness(3, 6, 0, 3);
293 | paragraph.Foreground = Colors.DeepBlue;
294 | paragraph.Inlines.Add(fl);
295 | messageArea.Document.Blocks.Add(paragraph);
296 |
297 | //add msg part
298 | paragraph = new();
299 | paragraph.Margin = new Thickness(3, 0, 0, 6);
300 | if (at)
301 | {
302 | r.Background = Colors.CyanBlue;
303 | }
304 | paragraph.Inlines.Add(r);
305 | messageArea.Document.Blocks.Add(paragraph);
306 | }
307 |
308 | //flash notice
309 | if (!SSC_Window.IsFocused)
310 | {
311 | FlashTaskBar(m_wpfHwnd, FlashType.FLASHW_TIMERNOFG);
312 | }
313 | }));
314 |
315 | }
316 |
317 | public void AddSvrMsg(string msg)
318 | {
319 | this.Dispatcher.Invoke(new Action(() =>
320 | {
321 | Paragraph paragraph = new();
322 | Run r = new(msg);
323 | paragraph.Margin = new Thickness(3, 3, 0, 0);
324 | paragraph.Foreground = Colors.SoftRed;
325 | paragraph.FontStyle = FontStyles.Italic;
326 | paragraph.Inlines.Add(r);
327 | messageArea.Document.Blocks.Add(paragraph);
328 |
329 | //flash notice
330 | if (!SSC_Window.IsFocused)
331 | {
332 | FlashTaskBar(m_wpfHwnd, FlashType.FLASHW_TIMERNOFG);
333 | }
334 | }));
335 | }
336 |
337 |
338 | public void AddStatus(string msg)
339 | {
340 | this.Dispatcher.Invoke(new Action(() =>
341 | {
342 | Paragraph paragraph = new();
343 | Run r = new(msg);
344 | paragraph.Margin = new Thickness(3, 3, 0, 0);
345 | paragraph.Foreground = Colors.Gray;
346 | paragraph.FontStyle = FontStyles.Italic;
347 | paragraph.Inlines.Add(r);
348 | messageArea.Document.Blocks.Add(paragraph);
349 |
350 | //flash notice
351 | if (!SSC_Window.IsFocused)
352 | {
353 | FlashTaskBar(m_wpfHwnd, FlashType.FLASHW_TIMERNOFG);
354 | }
355 | }));
356 | }
357 |
358 | public struct FLASHWINFO
359 | {
360 | public UInt32 cbSize;
361 | public IntPtr hwnd;
362 | public UInt32 dwFlags;
363 | public UInt32 uCount;
364 | public UInt32 dwTimeout;
365 | }
366 |
367 | [DllImport("user32.dll")]
368 | public static extern bool FlashWindowEx(ref FLASHWINFO pwfi);
369 |
370 | public enum FlashType : uint
371 | {
372 | FLASHW_STOP = 0,
373 | FALSHW_CAPTION = 1,
374 | FLASHW_TRAY = 2,
375 | FLASHW_ALL = 3,
376 | FLASHW_PARAM1 = 4,
377 | FLASHW_PARAM2 = 12,
378 | FLASHW_TIMER = FLASHW_TRAY | FLASHW_PARAM1,
379 | FLASHW_TIMERNOFG = FLASHW_TRAY | FLASHW_PARAM2
380 | }
381 |
382 | public static bool FlashTaskBar(IntPtr hWnd, FlashType type)
383 | {
384 | FLASHWINFO fInfo = new();
385 | fInfo.cbSize = Convert.ToUInt32(Marshal.SizeOf(fInfo));
386 | fInfo.hwnd = hWnd;
387 | fInfo.dwFlags = (uint)type;
388 | fInfo.uCount = Convert.ToUInt32(5);
389 | fInfo.dwTimeout = 1000;
390 | return FlashWindowEx(ref fInfo);
391 | }
392 |
393 | #endregion
394 |
395 | public void DoDisconnect(bool autoIdle = true)
396 | {
397 | SetUI(UIState.Disconnecting);
398 | m_net.Disconnect();
399 | if (autoIdle)
400 | {
401 | AddStatus("Disconnected");
402 | SetUI(UIState.Idle);
403 | }
404 | }
405 |
406 | public void DoConnect(string host, int port)
407 | {
408 | SetUI(UIState.Connecting);
409 | AddStatus("Connecting...");
410 | m_net = new(KeyBox.Text);
411 | m_net.transport.ReceiveTimeout = 3000; // will set to 0 after setup
412 | m_net.Connect(host, port, () =>
413 | {
414 | Task.Run(SetupWorker);
415 | },
416 | (exc) =>
417 | {
418 | AddStatus($"Connect Failed ({exc.Message})");
419 | SetUI(UIState.Idle);
420 | });
421 | }
422 |
423 | ManualResetEvent m_fpWndCloseEvent = new(false);
424 | FingerPrint fpWnd;
425 |
426 | public void SetupWorker() // session setup after connected
427 | {
428 |
429 | Message? msg;
430 | X509Certificate2 serverCert;
431 |
432 | //Client hello for ECC public key
433 | m_net.Send(new(MsgType.HELLO));
434 | msg = m_net.ReceiveNext();
435 | if (msg == null || msg.Type != MsgType.HELLO)
436 | {
437 | AddStatus("Session Setup Failed");
438 | DoDisconnect();
439 | return;
440 | }
441 |
442 | try
443 | {
444 | var certData = msg.GetParam(0);
445 | serverCert = X509.Load(certData);
446 | }
447 | catch (Exception)
448 | {
449 | AddStatus("Invalid Certificate");
450 | DoDisconnect();
451 | return;
452 | }
453 |
454 | m_fpWndCloseEvent.Reset();
455 | Dispatcher.Invoke(() =>
456 | {
457 | fpWnd = new FingerPrint(this, serverCert);
458 | fpWnd.Closed += (object? sender, EventArgs e) =>
459 | {
460 | if (fpWnd.trustResult == FingerPrint.TrustResult.Trust)
461 | {
462 | m_db.Insert(new Server() { Host = m_net.RemoteHost, Port = m_net.RemotePort, SHA1 = serverCert.GetCertHashString() });
463 | }
464 | };
465 |
466 | if (m_db.Query("SELECT * FROM Server WHERE Host = ? AND SHA1 = ?", m_net.RemoteHost, serverCert.GetCertHashString()).Count == 0)
467 | {
468 | Dispatcher.Invoke(new Action(() =>
469 | {
470 | fpWnd.ShowDialog();
471 | }));
472 | }
473 | else
474 | {
475 | fpWnd.trustResult = FingerPrint.TrustResult.Trust;
476 | }
477 | m_fpWndCloseEvent.Set();
478 | });
479 | m_fpWndCloseEvent.WaitOne();
480 |
481 | if (fpWnd.trustResult == FingerPrint.TrustResult.Cancel)
482 | {
483 | AddStatus("User Canceled");
484 | DoDisconnect();
485 | return;
486 | }
487 |
488 | //ECDH for session key
489 | try
490 | {
491 | ECDH ecdh = new();
492 | m_net.Send(new(MsgType.KEY, ecdh.GetPublicKeyBlob()));
493 | byte[] newKey = ecdh.DeriveKey(serverCert);
494 | m_net.UpdateAesKey(newKey);
495 |
496 | //key exchange check
497 | msg = m_net.ReceiveNext();
498 | if (msg != null && msg.Type != MsgType.KEY)
499 | {
500 | AddStatus("Key Exchange Failed");
501 | DoDisconnect();
502 | return;
503 | }
504 | }
505 | catch (Exception ex)
506 | {
507 | AddStatus("Key Exchange Failed");
508 | AddStatus(ex.ToString());
509 | DoDisconnect();
510 | return;
511 | }
512 |
513 | //acquire nickname
514 | try
515 | {
516 | m_net.Send(new(MsgType.NICK, m_nick));
517 | }
518 | catch (Exception ex)
519 | {
520 | AddStatus("Nickname Acquire Failed");
521 | AddStatus(ex.ToString());
522 | DoDisconnect();
523 | return;
524 | }
525 |
526 | //MsgLoop
527 | MsgLoop();
528 | }
529 |
530 | public void MsgLoop()
531 | {
532 | try
533 | {
534 | foreach (Message msg in m_net.Receive())
535 | {
536 | switch (msg.Type)
537 | {
538 | case MsgType.NICK:
539 | if (msg.GetParam(0) == "OK")
540 | {
541 | m_net.transport.ReceiveTimeout = 0;
542 | AddStatus("Connected");
543 | SetUI(UIState.Connected);
544 | }
545 | else
546 | {
547 | AddSvrMsg(msg.GetParam(0));
548 | DoDisconnect();
549 | return;
550 | }
551 | break;
552 | case MsgType.MSG:
553 | AddMessage(msg.GetParam(0), msg.GetParam(1));
554 | break;
555 | case MsgType.SYS:
556 | AddSvrMsg(msg.GetParam(0));
557 | break;
558 | default:
559 | break;
560 | }
561 | }
562 | }
563 | catch (Exception ex)
564 | {
565 | AddStatus(ex.ToString());
566 | }
567 | finally
568 | {
569 | if (m_UIState != UIState.Disconnecting)
570 | {
571 | AddStatus("Connection Lost");
572 | }
573 | AddStatus("Disconnected");
574 | SetUI(UIState.Idle);
575 | }
576 | }
577 |
578 | public void Sendmsg()
579 | {
580 | if (sendBox.Text == "") return;
581 |
582 | try
583 | {
584 | m_net.Send(new(MsgType.MSG, sendBox.Text));
585 | AddMessage(m_nick, sendBox.Text, self: true);
586 | sendBox.Text = "";
587 | }
588 | catch
589 | {
590 | //ignore
591 | }
592 | }
593 |
594 | }
595 | }
--------------------------------------------------------------------------------
/ChatClient/Model/Persistent.cs:
--------------------------------------------------------------------------------
1 | using SQLite;
2 | using System;
3 | using System.Collections.Generic;
4 | using System.Linq;
5 | using System.Text;
6 | using System.Threading.Tasks;
7 |
8 | namespace ChatClient.Model
9 | {
10 | internal class Server
11 | {
12 | [PrimaryKey, AutoIncrement]
13 | public int Id { get; set; }
14 | public string Host { get; set; }
15 | public int Port { get; set; }
16 | public string SHA1 { get; set; }
17 |
18 | }
19 | }
20 |
--------------------------------------------------------------------------------
/ChatClient/Properties/Settings.Designer.cs:
--------------------------------------------------------------------------------
1 | //------------------------------------------------------------------------------
2 | //
3 | // 此代码由工具生成。
4 | // 运行时版本:4.0.30319.42000
5 | //
6 | // 对此文件的更改可能会导致不正确的行为，并且如果
7 | // 重新生成代码，这些更改将会丢失。
8 | //
9 | //------------------------------------------------------------------------------
10 |
11 | namespace ChatClient.Properties {
12 |
13 |
14 | [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
15 | [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "17.1.0.0")]
16 | internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase {
17 |
18 | private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
19 |
20 | public static Settings Default {
21 | get {
22 | return defaultInstance;
23 | }
24 | }
25 | }
26 | }
27 |
--------------------------------------------------------------------------------
/ChatClient/Properties/Settings.settings:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 |
5 |
6 |
7 |
--------------------------------------------------------------------------------
/ChatClient/Visual/Colors.cs:
--------------------------------------------------------------------------------
1 | using System;
2 | using System.Collections.Generic;
3 | using System.Linq;
4 | using System.Text;
5 | using System.Threading.Tasks;
6 | using System.Windows.Media;
7 |
8 | namespace ChatClient.Visual
9 | {
10 | internal class Colors
11 | {
12 | public static readonly SolidColorBrush Green = new(Color.FromRgb(51, 153, 102));
13 | public static readonly SolidColorBrush DeepBlue = new(Color.FromRgb(0, 102, 225));
14 | public static readonly SolidColorBrush SoftRed = new(Color.FromRgb(255, 100, 100));
15 | public static readonly SolidColorBrush CyanBlue = new(Color.FromArgb(50, 0, 204, 153));
16 | public static readonly SolidColorBrush Gray = new(Color.FromRgb(128, 128, 128));
17 | }
18 | }
19 |
--------------------------------------------------------------------------------
/ChatServer/ChatServer.csproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | Exe
5 | net6.0-windows
6 | win10-x64
7 | enable
8 | enable
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
--------------------------------------------------------------------------------
/ChatServer/ClientMgr.cs:
--------------------------------------------------------------------------------
1 | using Common.Network;
2 | using Common.Network.Data;
3 | using System;
4 | using System.Collections.Generic;
5 | using System.Linq;
6 | using System.Net.Sockets;
7 | using System.Text;
8 | using System.Threading.Tasks;
9 |
10 | namespace ChatServer
11 | {
12 | internal class ClientMgr
13 | {
14 | public static Dictionary clientMap = new();
15 |
16 | public static void Register(string name, NetClient s)
17 | {
18 | clientMap.Add(name, s);
19 | }
20 |
21 | public static void Unregister(NetClient client)
22 | {
23 | clientMap.Remove((string)client.state.GetValueOrDefault("nick", ""));
24 | }
25 |
26 | public static bool ClientNicknameExisted(string username)
27 | {
28 | foreach (var s in clientMap)
29 | {
30 | if (s.Key == username)
31 | {
32 | return true;
33 | }
34 | }
35 | return false;
36 | }
37 |
38 | public static void KickAllClient()
39 | {
40 | foreach (var item in clientMap)
41 | {
42 | try
43 | {
44 | item.Value.Disconnect();
45 | }
46 | catch
47 | {
48 | //ignore
49 | }
50 | }
51 |
52 | }
53 |
54 | public static string FmtAllClients()
55 | {
56 | string temp = "";
57 | foreach (var s in clientMap)
58 | {
59 | temp += string.Format("\"{0}\" ", s.Key);
60 | }
61 | return temp;
62 | }
63 |
64 | public static void Broadcast(Message msg)
65 | {
66 | Broadcast(msg, null);
67 | }
68 | public static void Broadcast(Message msg, NetClient? except)
69 | {
70 | foreach (var s in clientMap)
71 | {
72 | try
73 | {
74 | if (except == null || except != s.Value) s.Value.Send(msg);
75 | }
76 | catch
77 | {
78 | //ignore
79 | }
80 | }
81 | }
82 | }
83 | }
84 |
--------------------------------------------------------------------------------
/ChatServer/Program.cs:
--------------------------------------------------------------------------------
1 | using Common.Cipher;
2 | using Common.Log;
3 | using Common.Network;
4 | using Common.Network.Data;
5 | using System.Diagnostics;
6 | using System.Security.Cryptography;
7 | using System.Security.Cryptography.X509Certificates;
8 |
9 | namespace ChatServer
10 | {
11 | internal class Program
12 | {
13 | #pragma warning disable CS8618
14 | static X509Certificate2 serverCert;
15 | #pragma warning restore CS8618
16 |
17 | static void Main()
18 | {
19 | try
20 | {
21 | serverCert = X509.LoadDefault();
22 | }
23 | catch
24 | {
25 | Logger.Error("Failed to load certificate, generating self-signed certificate...");
26 | X509.GenerateDefault();
27 | Environment.Exit(1);
28 | }
29 |
30 | if (serverCert == null)
31 | {
32 | Logger.Error("Failed to load certificate");
33 | Environment.Exit(1);
34 | }
35 |
36 | if (serverCert.GetECDsaPrivateKey() == null)
37 | {
38 | Logger.Error("Invalid ECDSA PKCS#12 Certificate");
39 | Environment.Exit(1);
40 | }
41 | else
42 | {
43 | Logger.Info($"Loaded X.509 {serverCert.GetCertHashString()}");
44 | }
45 |
46 | NetServer server = new("SSCv3_Default_Key");
47 |
48 | server.Listen("0.0.0.0", 12344, (exc) =>
49 | {
50 | Logger.Error("Listen failed ({0})", exc.Message);
51 | Environment.Exit(1);
52 | });
53 |
54 | server.AcceptLoop(
55 | (client) => {
56 | Logger.Info("{0} Connected", client);
57 | client.transport.ReceiveTimeout = 30000;
58 | },
59 | (client) =>
60 | {
61 | Logger.Info("{0} Disconnected", client);
62 | ClientMgr.Unregister(client);
63 | client.Dispose();
64 | },
65 | (client, msg) => MessageHandler(client, msg),
66 | (socket, client, exc) =>
67 | {
68 | if (socket != null && client != null)
69 | {
70 | Logger.Error($"{client} Error occured. \n{exc})");
71 | }
72 | else
73 | {
74 | Logger.Error("Error on accept ({0})", exc.Message);
75 | }
76 | }
77 | );
78 |
79 | server.Dispose();
80 | Logger.Info("Server stopped");
81 | }
82 |
83 | static void MessageHandler(NetClient client, Message msg)
84 | {
85 | string logStr = $"{client} {msg.Type} - ";
86 | var log = (string result) =>
87 | {
88 | Logger.Info(logStr + result);
89 | };
90 |
91 | bool nickReady = client.state.ContainsKey("nick");
92 | string nick = (string)client.state.GetValueOrDefault("nick", "");
93 |
94 | switch (msg.Type)
95 | {
96 | case MsgType.NICK:
97 | string pendingNick = msg.GetParam(0);
98 | //if nickname already set
99 | if (nickReady)
100 | {
101 | client.Send(new(MsgType.NICK, "Nickname already set"));
102 | log("Failed(ALREADY_SET)");
103 | return;
104 | }
105 |
106 | //if username duplicate
107 | if (ClientMgr.ClientNicknameExisted(pendingNick))
108 | {
109 | client.Send(new(MsgType.NICK, "Nickname existed"));
110 | log("Failed(DUPLICATE)");
111 | return;
112 | }
113 |
114 | //if username not allowed
115 | if (new char[] { '&', '@' }.Contains(pendingNick[0]))
116 | {
117 | client.Send(new(MsgType.NICK, "Illegal nickname"));
118 | log("Failed(ILLEGAL)");
119 | return;
120 | }
121 |
122 | //setup nickname
123 | client.state.Add("nick", pendingNick);
124 | ClientMgr.Register(pendingNick, client);
125 | client.transport.ReceiveTimeout = 0;
126 |
127 | //reply
128 | client.Send(new(MsgType.NICK, "OK"));
129 | log("OK");
130 |
131 | //send welcome msg to client
132 | client.Send(new(MsgType.SYS, $"Welcome to server."));
133 |
134 | //broadcast join msg
135 | ClientMgr.Broadcast(new(MsgType.SYS, $"{pendingNick} joined."));
136 | break;
137 | case MsgType.MSG:
138 | string text = msg.GetParam(0);
139 | //if username not set
140 | if (!nickReady)
141 | {
142 | client.Send(new(MsgType.SYS, "Nickname not set"));
143 | log("Failed(NICKNAME_NOT_SET)");
144 | return;
145 | }
146 | //log
147 | Logger.Info($"{client} ({nick}): {text}");
148 |
149 | //command handling
150 | string[] commandstring = text.Split(' ', StringSplitOptions.None);
151 |
152 | //is this msg a command?
153 | if (text == "@h")
154 | {
155 | client.Send(new(MsgType.MSG, "Server", "Commands: \r\n@h - Show Help\r\n@l - List Online Users\r\n@m [User] [Msg] - send a private msg"));
156 | return;
157 | }
158 |
159 | if (text == "@l")
160 | {
161 | client.Send(new(MsgType.MSG, "Server", $"Online:\r\n{ClientMgr.FmtAllClients()}"));
162 | return;
163 | }
164 |
165 | if (commandstring[0] == "@m")
166 | {
167 | if (commandstring.Length < 3)
168 | {
169 | client.Send(new(MsgType.MSG, "Server", "Usage: @m [User] [Message]"));
170 | return;
171 | }
172 | string TargetUser = commandstring[1];
173 |
174 | if (!ClientMgr.clientMap.ContainsKey(TargetUser))
175 | {
176 | client.Send(new(MsgType.MSG, "Server", $"User \"{TargetUser}\" Not Found"));
177 | return;
178 | }
179 | else
180 | {
181 | string _tmpmsg = "";
182 | for (int i = 2; i < commandstring.Length; i++)
183 | {
184 | _tmpmsg += commandstring[i] + " ";
185 | }
186 | ClientMgr.clientMap[TargetUser].Send(new(MsgType.MSG, $"PM From {nick}", _tmpmsg));
187 | return;
188 | }
189 | }
190 |
191 | //broadcast to any other client
192 | ClientMgr.Broadcast(new(MsgType.MSG, nick, text), client);
193 |
194 | break;
195 | case MsgType.HELLO:
196 | client.Send(new(MsgType.HELLO, serverCert.Export(X509ContentType.Cert)));
197 | break;
198 | case MsgType.KEY:
199 | ECDH ecdh = new(serverCert);
200 | byte[] keyData = msg.GetParam(0);
201 | byte[]? newKey = ecdh.DeriveKey(keyData);
202 | client.UpdateAesKey(newKey);
203 | client.Send(new(MsgType.KEY));
204 | break;
205 | default:
206 | Logger.Error("{0} sending unknown message type({1})", client, msg.Type);
207 | break;
208 | }
209 | }
210 | }
211 | }
212 |
--------------------------------------------------------------------------------
/Common/Cipher/AES256GCM.cs:
--------------------------------------------------------------------------------
1 | using System;
2 | using System.Buffers.Binary;
3 | using System.Collections.Generic;
4 | using System.Security.Cryptography;
5 | using System.Text;
6 |
7 | namespace Common.Cipher
8 | {
9 | ///
10 | /// https://stackoverflow.com/questions/60889345/using-the-aesgcm-class
11 | ///
12 | public class Aes256Gcm : IDisposable
13 | {
14 | private AesGcm m_aes;
15 | private byte[] m_key;
16 |
17 | public Aes256Gcm Copy()
18 | {
19 | return new Aes256Gcm(m_key);
20 | }
21 |
22 | #pragma warning disable CS8618
23 | public Aes256Gcm(string password)
24 | {
25 | SetPassword(password);
26 | }
27 | public Aes256Gcm(byte[] key)
28 | {
29 | SetKey(key);
30 | }
31 | #pragma warning restore CS8618
32 |
33 | public void SetPassword(string password)
34 | {
35 | byte[] salt = Encoding.ASCII.GetBytes("S1mple3ecuReChaT");
36 | byte[] key = new Rfc2898DeriveBytes(password, salt, 10000, HashAlgorithmName.SHA256).GetBytes(32);
37 | SetKey(key);
38 | }
39 | public void SetKey(byte[] key)
40 | {
41 | if (key == null || key.Length != 32) throw new Exception("Key must be 32 bytes");
42 | if (m_aes != null) m_aes.Dispose();
43 | m_key = key;
44 | m_aes = new AesGcm(key);
45 | }
46 |
47 | public byte[] Encrypt(byte[] plain)
48 | {
49 | // Get bytes of plaintext string
50 | byte[] plainBytes = plain;
51 |
52 | // Get parameter sizes
53 | int nonceSize = AesGcm.NonceByteSizes.MaxSize;
54 | int tagSize = AesGcm.TagByteSizes.MaxSize;
55 | int cipherSize = plainBytes.Length;
56 |
57 | // We write everything into one big array for easier encoding
58 | int encryptedDataLength = 4 + nonceSize + 4 + tagSize + cipherSize;
59 | Span encryptedData = encryptedDataLength < 1024 ? stackalloc byte[encryptedDataLength] : new byte[encryptedDataLength].AsSpan();
60 |
61 | // Copy parameters
62 | BinaryPrimitives.WriteInt32LittleEndian(encryptedData.Slice(0, 4), nonceSize);
63 | BinaryPrimitives.WriteInt32LittleEndian(encryptedData.Slice(4 + nonceSize, 4), tagSize);
64 | var nonce = encryptedData.Slice(4, nonceSize);
65 | var tag = encryptedData.Slice(4 + nonceSize + 4, tagSize);
66 | var cipherBytes = encryptedData.Slice(4 + nonceSize + 4 + tagSize, cipherSize);
67 |
68 | // Generate secure nonce
69 | RandomNumberGenerator.Fill(nonce);
70 |
71 | // Encrypt
72 | m_aes.Encrypt(nonce, plainBytes.AsSpan(), cipherBytes, tag);
73 |
74 | // Encode for transmission
75 | return encryptedData.ToArray();
76 | }
77 |
78 | public byte[] Decrypt(byte[] cipher)
79 | {
80 | // Decode
81 | Span encryptedData = cipher;
82 |
83 | // Extract parameter sizes
84 | int nonceSize = BinaryPrimitives.ReadInt32LittleEndian(encryptedData.Slice(0, 4));
85 | int tagSize = BinaryPrimitives.ReadInt32LittleEndian(encryptedData.Slice(4 + nonceSize, 4));
86 | int cipherSize = encryptedData.Length - 4 - nonceSize - 4 - tagSize;
87 |
88 | // Extract parameters
89 | var nonce = encryptedData.Slice(4, nonceSize);
90 | var tag = encryptedData.Slice(4 + nonceSize + 4, tagSize);
91 | var cipherBytes = encryptedData.Slice(4 + nonceSize + 4 + tagSize, cipherSize);
92 |
93 | // Decrypt
94 | Span plainBytes = cipherSize < 1024 ? stackalloc byte[cipherSize] : new byte[cipherSize];
95 | m_aes.Decrypt(nonce, cipherBytes, tag, plainBytes);
96 |
97 | // Convert plain bytes back into string
98 | return plainBytes.ToArray();
99 | }
100 | public void Dispose()
101 | {
102 | m_key = Array.Empty();
103 | m_aes.Dispose();
104 | }
105 | }
106 | }
107 |
--------------------------------------------------------------------------------
/Common/Cipher/ECDH.cs:
--------------------------------------------------------------------------------
1 | using System;
2 | using System.Security.Cryptography;
3 | using System.Security.Cryptography.X509Certificates;
4 | using System.Text;
5 |
6 | namespace Common.Cipher
7 | {
8 | ///
9 | /// ECC 512bit Diffie Hellman
10 | ///
11 | public class ECDH
12 | {
13 | readonly ECDiffieHellmanCng local;
14 |
15 | ///
16 | /// Init ECDH with random key
17 | ///
18 | public ECDH()
19 | {
20 | local = new(keySize: 521);
21 | local.KeyDerivationFunction = ECDiffieHellmanKeyDerivationFunction.Hash;
22 | local.HashAlgorithm = CngAlgorithm.Sha256;
23 | local.SecretPrepend = Encoding.UTF8.GetBytes("SSCv3");
24 | local.SecretAppend = Encoding.UTF8.GetBytes("ECDH");
25 | }
26 |
27 | ///
28 | /// Init ECDH from existed ECDSA X.509 Certificate
29 | ///
30 | ///
31 | ///
32 | public ECDH(X509Certificate2 cert)
33 | {
34 | ECDsaCng? privKey = cert.GetECDsaPrivateKey() as ECDsaCng;
35 | if (privKey == null)
36 | throw new Exception("Invalid Certificate");
37 | if (privKey.Key.KeySize != 521)
38 | throw new Exception("Unmatch key size");
39 |
40 | // make it exportable
41 | privKey.Key.SetProperty(new CngProperty("Export Policy", BitConverter.GetBytes((int)CngExportPolicies.AllowPlaintextExport), CngPropertyOptions.Persist));
42 |
43 | var final = privKey.Key.Export(CngKeyBlobFormat.EccPrivateBlob);
44 | final[2] = 0x4b; // patch header from BCRYPT_ECDSA_PRIVATE_P521_MAGIC to BCRYPT_ECDH_PRIVATE_P521_MAGIC
45 |
46 | local = new(CngKey.Import(final, CngKeyBlobFormat.EccPrivateBlob));
47 | local.KeyDerivationFunction = ECDiffieHellmanKeyDerivationFunction.Hash;
48 | local.HashAlgorithm = CngAlgorithm.Sha256;
49 | local.SecretPrepend = Encoding.UTF8.GetBytes("SSCv3");
50 | local.SecretAppend = Encoding.UTF8.GetBytes("ECDH");
51 | }
52 |
53 | public byte[] DeriveKey(X509Certificate2 remoteCert)
54 | {
55 | ECDsaCng? publicKey = remoteCert.GetECDsaPublicKey() as ECDsaCng;
56 | if (publicKey == null)
57 | throw new Exception("Invalid certificate");
58 |
59 | ECParameters remotePublicParams = publicKey.ExportParameters(false);
60 | ECDiffieHellman remotePublicCng = ECDiffieHellman.Create(remotePublicParams);
61 | return local.DeriveKeyMaterial(remotePublicCng.PublicKey);
62 | }
63 |
64 | public byte[] DeriveKey(byte[] eccPubKeyBlob)
65 | {
66 | return local.DeriveKeyMaterial(CngKey.Import(eccPubKeyBlob, CngKeyBlobFormat.EccPublicBlob));
67 | }
68 |
69 | public byte[] GetPublicKeyBlob()
70 | {
71 | return local.PublicKey.ToByteArray();
72 | }
73 |
74 | }
75 | }
76 |
--------------------------------------------------------------------------------
/Common/Cipher/X509.cs:
--------------------------------------------------------------------------------
1 | using System;
2 | using System.IO;
3 | using System.Reflection;
4 | using System.Security.Cryptography;
5 | using System.Security.Cryptography.X509Certificates;
6 |
7 | namespace Common.Cipher
8 | {
9 | ///
10 | /// ECC 521bit X.509
11 | ///
12 | public class X509
13 | {
14 | static readonly string DEFAULT_PFX_FILENAME = "private.pfx";
15 | static readonly string DEFAULT_REQ = "CN=SimpleSecureChatServer";
16 |
17 | private static string? GetCurrentDirectory()
18 | {
19 | return Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
20 | }
21 |
22 | public static X509Certificate2 LoadDefault()
23 | {
24 | string? currentPath = GetCurrentDirectory();
25 | if (currentPath == null)
26 | {
27 | throw new Exception("Could not get current path");
28 | }
29 | return Load(Path.Combine(currentPath, DEFAULT_PFX_FILENAME), exportable: true);
30 | }
31 |
32 | public static X509Certificate2 Load(string filename, bool exportable = false)
33 | {
34 | if (exportable)
35 | {
36 | return new X509Certificate2(filename, (string?)null, X509KeyStorageFlags.Exportable | X509KeyStorageFlags.EphemeralKeySet);
37 | }
38 | return new X509Certificate2(filename);
39 | }
40 |
41 | public static X509Certificate2 Load(byte[] data, bool exportable = false)
42 | {
43 | if (exportable)
44 | {
45 | return new X509Certificate2(data, (string?)null, X509KeyStorageFlags.Exportable | X509KeyStorageFlags.EphemeralKeySet);
46 | }
47 | return new X509Certificate2(data);
48 | }
49 |
50 | public static void GenerateDefault()
51 | {
52 | string? currentPath = GetCurrentDirectory();
53 | if (currentPath == null)
54 | {
55 | throw new Exception("Could not get current path");
56 | }
57 |
58 | Generate(Path.Combine(currentPath, DEFAULT_PFX_FILENAME), DEFAULT_REQ);
59 | }
60 |
61 | public static void Generate(string pfxPath, string subjectName)
62 | {
63 | var ecdsa = ECDsa.Create();
64 | var req = new CertificateRequest(subjectName, ecdsa, HashAlgorithmName.SHA256);
65 | var cert = req.CreateSelfSigned(DateTimeOffset.Now, DateTimeOffset.Now.AddYears(5));
66 |
67 | // Create PFX (PKCS #12) keypair
68 | File.WriteAllBytes(pfxPath, cert.Export(X509ContentType.Pfx));
69 | // Create certificate with public key only
70 | File.WriteAllBytes(pfxPath + ".cer", cert.Export(X509ContentType.Cert));
71 | }
72 |
73 | }
74 | }
75 |
--------------------------------------------------------------------------------
/Common/Common.projitems:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | $(MSBuildAllProjects);$(MSBuildThisFileFullPath)
5 | true
6 | b59be219-512e-4efe-940b-076b68b97d68
7 |
8 |
9 | Common
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
21 |
22 |
23 |
24 |
--------------------------------------------------------------------------------
/Common/Common.shproj:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | b59be219-512e-4efe-940b-076b68b97d68
5 | 14.0
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
--------------------------------------------------------------------------------
/Common/Log/Logger.cs:
--------------------------------------------------------------------------------
1 | using System;
2 | using System.Collections.Generic;
3 | using System.Text;
4 |
5 | namespace Common.Log
6 | {
7 | public class Logger
8 | {
9 | public static void Error(string format, params object[] args)
10 | {
11 | Console.BackgroundColor = ConsoleColor.DarkRed;
12 | Console.ForegroundColor = ConsoleColor.White;
13 | Write("ERRO", format, args);
14 | Console.ResetColor();
15 | }
16 | public static void Warn(string format, params object[] args)
17 | {
18 | Console.BackgroundColor = ConsoleColor.DarkYellow;
19 | Console.ForegroundColor = ConsoleColor.White;
20 | Write("WARN", format, args);
21 | Console.ResetColor();
22 | }
23 | public static void Info(string format, params object[] args)
24 | {
25 | Write("INFO", format, args);
26 | }
27 |
28 | public static void Debug(string format, params object[] args)
29 | {
30 | Console.ForegroundColor = ConsoleColor.DarkGray;
31 | Write("DBUG", format, args);
32 | Console.ResetColor();
33 | }
34 |
35 | private static string Prefix(string level)
36 | {
37 | return $"[{DateTime.Now}][{level}] ";
38 | }
39 | private static void Write(string level, string format, params object[] args)
40 | {
41 | Console.WriteLine(Prefix(level) + format, args);
42 | }
43 |
44 | }
45 | }
46 |
--------------------------------------------------------------------------------
/Common/Network/Data/Message.cs:
--------------------------------------------------------------------------------
1 | using MessagePack;
2 | using System.Collections.Generic;
3 |
4 | namespace Common.Network.Data
5 | {
6 | public enum MsgType
7 | {
8 | // Common
9 | HELLO = 0x00, // certificate
10 | KEY = 0x01, // session key exchange message
11 | NICK = 0x02, // nickname acquire / result
12 | MSG = 0x03, // chat message
13 | // Server only
14 | SYS = 0xA0, // human-read server msg
15 | }
16 | [MessagePackObject]
17 | public class Message
18 | {
19 | [Key(0)]
20 | public MsgType Type;
21 | [Key(1)]
22 | public object[] Params;
23 |
24 | public Message(MsgType type, params object[] param)
25 | {
26 | Type = type;
27 | Params = param;
28 | }
29 |
30 | public T GetParam(int index)
31 | {
32 | return (T)Params[index];
33 | }
34 |
35 | // tostring method for debugging
36 | public override string ToString()
37 | {
38 | return $"{Type} {Params}";
39 | }
40 |
41 | // explicit cast support
42 | public static explicit operator Message(byte[] bytes)
43 | {
44 | return MessagePackSerializer.Deserialize(bytes);
45 | }
46 | public static explicit operator byte[](Message obj)
47 | {
48 | return MessagePackSerializer.Serialize(obj);
49 | }
50 | }
51 | }
52 |
--------------------------------------------------------------------------------
/Common/Network/Multicast.cs:
--------------------------------------------------------------------------------
1 | using System;
2 | using System.Collections.Generic;
3 | using System.Net.Sockets;
4 | using System.Text;
5 |
6 | namespace Common.Network
7 | {
8 | internal class Multicast
9 | {
10 | }
11 | }
12 |
--------------------------------------------------------------------------------
/Common/Network/NetClient.cs:
--------------------------------------------------------------------------------
1 | using System;
2 | using System.Collections.Generic;
3 | using System.Text;
4 | using System.Net.Sockets;
5 | using Common.Cipher;
6 | using MessagePack;
7 | using System.Net;
8 | using Common.Log;
9 | using Common.Network.Data;
10 | using Common.Network.Transport;
11 |
12 | namespace Common.Network
13 | {
14 | public class NetClient : IDisposable
15 | {
16 | public string RemoteHost { get => transport.RemoteHost; }
17 | public int RemotePort { get => transport.RemotePort; }
18 |
19 | public Dictionary state = new();
20 |
21 | public readonly ITransport transport;
22 | Aes256Gcm _aes;
23 |
24 | public NetClient(string aesPwd)
25 | {
26 | transport = new TCPTransport();
27 | _aes = new Aes256Gcm(aesPwd);
28 | }
29 |
30 | public NetClient(ITransport clientSocket, Aes256Gcm aesInstance)
31 | {
32 | transport = clientSocket;
33 | _aes = aesInstance;
34 | }
35 |
36 | public void UpdateAesKey(byte[] key)
37 | {
38 | _aes = new Aes256Gcm(key);
39 | }
40 |
41 | // Connect is called by the client to initiate the connection to the server asynchronously.
42 | // success delegate is called when the connection is established.
43 | // error delegate is called if the connection fails.
44 | public void Connect(string host, int port, Action success, Action exception)
45 | {
46 | transport.Connect(host, port, success, exception);
47 | }
48 |
49 | // Receive method is called by the client to iterate messages recv from the server
50 | // and parse it into a Message object.
51 | public IEnumerable Receive()
52 | {
53 | foreach (byte[] cipherData in transport.Receive())
54 | {
55 | // decrypt data
56 | byte[] decryptedData = _aes.Decrypt(cipherData);
57 | // yield parsed messagepack data
58 | yield return (Message)decryptedData;
59 | }
60 | }
61 |
62 | // get next message from iterator
63 | public Message? ReceiveNext()
64 | {
65 | IEnumerator iter = Receive().GetEnumerator();
66 | if (iter.MoveNext())
67 | {
68 | return iter.Current;
69 | }
70 | return null;
71 | }
72 |
73 | public void Send(Message message)
74 | {
75 | Logger.Debug($"> {this} {message}");
76 | byte[] encryptedData = _aes.Encrypt((byte[])message);
77 | transport.Send(encryptedData);
78 | }
79 |
80 | public void Disconnect()
81 | {
82 | transport.Disconnect();
83 | }
84 |
85 | public void Dispose()
86 | {
87 | transport.Dispose();
88 | _aes.Dispose();
89 | GC.SuppressFinalize(this);
90 | }
91 |
92 | public override string ToString()
93 | {
94 | return $"{RemoteHost}:{RemotePort}";
95 | }
96 | }
97 | }
98 |
--------------------------------------------------------------------------------
/Common/Network/NetServer.cs:
--------------------------------------------------------------------------------
1 | using System;
2 | using System.Net.Sockets;
3 | using System.Net;
4 | using Common.Cipher;
5 | using System.Threading.Tasks;
6 | using Common.Log;
7 | using Common.Network.Data;
8 | using Common.Network.Transport;
9 |
10 | namespace Common.Network
11 | {
12 |
13 | public class NetServer : IDisposable
14 | {
15 | public readonly ITransport transport;
16 | readonly Aes256Gcm _aes;
17 |
18 | public NetServer(string aesPwd)
19 | {
20 | transport = new TCPTransport();
21 | _aes = new Aes256Gcm(aesPwd);
22 | }
23 |
24 | public void Listen(string ip, int port, Action excHandler)
25 | {
26 | try
27 | {
28 | transport.Start(ip, port);
29 | Logger.Info("Listening at {0}:{1}", ip, port);
30 | }
31 | catch (Exception ex)
32 | {
33 | excHandler(ex);
34 | }
35 | }
36 |
37 | ///
38 | /// Accepts a new connection and processing with delegates
39 | ///
40 | /// called when client connected
41 | /// called when client disconnected
42 | /// called when new message recved
43 | /// called when any exception throwed
44 | public void AcceptLoop(
45 | Action connectHandler, Action disconnectHandler,
46 | Action msgHandler, Action?, NetClient?, Exception> excHandler)
47 | {
48 | Logger.Info("Accepting connections...");
49 | while (true)
50 | {
51 | ITransport? clientTransport = null;
52 | NetClient? secureClient = null;
53 | try
54 | {
55 | clientTransport = transport.Accept();
56 | secureClient = new(clientTransport, _aes.Copy());
57 | connectHandler(secureClient);
58 | }
59 | catch (Exception ex)
60 | {
61 | excHandler(clientTransport, secureClient, ex);
62 | break;
63 | }
64 |
65 | // client thread
66 | Task.Run(() =>
67 | {
68 | try
69 | {
70 | foreach (Message msg in secureClient.Receive())
71 | {
72 | Logger.Debug($"< {secureClient} {msg}");
73 | msgHandler(secureClient, msg);
74 | }
75 | }
76 | catch (Exception ex)
77 | {
78 | excHandler(clientTransport, secureClient, ex);
79 | }
80 | finally
81 | {
82 | try
83 | {
84 | disconnectHandler(secureClient);
85 | }
86 | catch (Exception ex)
87 | {
88 | excHandler(clientTransport, secureClient, ex);
89 | }
90 | }
91 | });
92 | }
93 | }
94 |
95 | public void Dispose()
96 | {
97 | transport.Dispose();
98 | _aes.Dispose();
99 | GC.SuppressFinalize(this);
100 | }
101 | }
102 | }
103 |
--------------------------------------------------------------------------------
/Common/Network/NetUtils.cs:
--------------------------------------------------------------------------------
1 | using System;
2 | using System.Collections.Generic;
3 | using System.Net;
4 | using System.Text;
5 |
6 | namespace Common.Network
7 | {
8 | internal class NetUtils
9 | {
10 | // resolve domain string or ip string to IPAddress
11 | public static IPAddress Resolve(string host)
12 | {
13 | if (host == null || host.Length == 0)
14 | throw new ArgumentException("Host string is empty", nameof(host));
15 |
16 | if (!IPAddress.TryParse(host, out IPAddress ip))
17 | {
18 | IPHostEntry entry = Dns.GetHostEntry(host);
19 | if (entry.AddressList.Length > 0)
20 | ip = entry.AddressList[0];
21 | }
22 |
23 | if (ip == null)
24 | throw new ArgumentException("Host not found", nameof(host));
25 |
26 | return ip;
27 | }
28 |
29 | // convert port string to int and check
30 | public static int ResolvePort(string port)
31 | {
32 | if (port == null || port.Length == 0)
33 | throw new ArgumentException("Port string is empty", nameof(port));
34 |
35 | if (!int.TryParse(port, out int port_num))
36 | throw new ArgumentException("Port is not a number", nameof(port));
37 |
38 | if (port_num < IPEndPoint.MinPort || port_num > IPEndPoint.MaxPort)
39 | throw new ArgumentException("Port is out of range", nameof(port));
40 |
41 | return port_num;
42 | }
43 | }
44 | }
45 |
--------------------------------------------------------------------------------
/Common/Network/Transport/ITransport.cs:
--------------------------------------------------------------------------------
1 | using Common.Network.Data;
2 | using System;
3 | using System.Collections.Generic;
4 | using System.Net.Sockets;
5 | using System.Text;
6 |
7 | namespace Common.Network.Transport
8 | {
9 | // This is the interface for the transport layer
10 | // Implementations of this interface are responsible for sending and receiving data only
11 | // and provide reliable message-oriented async network operate via the Send and Receive methods
12 | // but underlying detail is up to the implementation
13 | public interface ITransport : IDisposable
14 | {
15 | public int ConnectTimeout { get; set; }
16 | public int SendTimeout { get; set; }
17 | public int ReceiveTimeout { get; set; }
18 | public string RemoteHost { get; }
19 | public int RemotePort { get; }
20 | public string LocalHost { get; }
21 | public int LocalPort { get; }
22 |
23 |
24 | public void Connect(string host, int port, Action success, Action exception);
25 | public void Disconnect();
26 | public bool IsConnected();
27 |
28 |
29 | public void Start(string ip, int port);
30 | public void Stop();
31 | public ITransport Accept();
32 |
33 |
34 | public void Send(T data);
35 | public IEnumerable Receive();
36 | }
37 | }
38 |
--------------------------------------------------------------------------------
/Common/Network/Transport/TCPTransport.cs:
--------------------------------------------------------------------------------
1 | using Common.Network.Data;
2 | using System;
3 | using System.Collections.Generic;
4 | using System.Net;
5 | using System.Net.Sockets;
6 | using System.Text;
7 |
8 | namespace Common.Network.Transport
9 | {
10 | public class TCPTransport : ITransport
11 | {
12 | readonly Socket m_tcp;
13 |
14 | public int ConnectTimeout { get; set; } = 5000;
15 | public int SendTimeout { get => m_tcp.SendTimeout; set => m_tcp.SendTimeout = value; }
16 | public int ReceiveTimeout { get => m_tcp.ReceiveTimeout; set => m_tcp.ReceiveTimeout = value; }
17 |
18 | public string RemoteHost => m_tcp.RemoteEndPoint is IPEndPoint ep ? ep.Address.ToString() : throw new NullReferenceException();
19 | public int RemotePort => m_tcp.RemoteEndPoint is IPEndPoint ep ? ep.Port : throw new NullReferenceException();
20 | public string LocalHost => m_tcp.LocalEndPoint is IPEndPoint ep ? ep.Address.ToString() : throw new NullReferenceException();
21 | public int LocalPort => m_tcp.LocalEndPoint is IPEndPoint ep ? ep.Port : throw new NullReferenceException();
22 |
23 | public TCPTransport()
24 | {
25 | m_tcp = new(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
26 | }
27 | public TCPTransport(Socket socket)
28 | {
29 | m_tcp = socket;
30 | }
31 |
32 | public void Connect(string host, int port, Action success, Action exception)
33 | {
34 | var ar = m_tcp.BeginConnect(host, port, null, null);
35 | bool connected = ar.AsyncWaitHandle.WaitOne(ConnectTimeout, true);
36 | if (connected)
37 | {
38 | try
39 | {
40 | m_tcp.EndConnect(ar);
41 | success();
42 | }
43 | catch (Exception e)
44 | {
45 | exception(e);
46 | }
47 | }
48 | else
49 | {
50 | m_tcp.Dispose();
51 | exception(new SocketException(10060)); // WSAETIMEDOUT 10060
52 | }
53 | }
54 |
55 | public void Disconnect()
56 | {
57 | m_tcp.Shutdown(SocketShutdown.Both);
58 | }
59 |
60 | public bool IsConnected()
61 | {
62 | return m_tcp.Connected;
63 | }
64 |
65 | public void Start(string ip, int port)
66 | {
67 | m_tcp.Bind(new IPEndPoint(IPAddress.Parse(ip), port));
68 | m_tcp.Listen(1024);
69 | }
70 |
71 | public void Stop()
72 | {
73 | throw new NotImplementedException();
74 | }
75 |
76 | public ITransport Accept()
77 | {
78 | return new TCPTransport(m_tcp.Accept());
79 | }
80 | public void Send(byte[] data)
81 | {
82 | byte[] lengthHeader = BitConverter.GetBytes(data.Length);
83 | m_tcp.Send(lengthHeader);
84 | m_tcp.Send(data);
85 | }
86 |
87 | public IEnumerable Receive()
88 | {
89 | while (true)
90 | {
91 | // read length header
92 | byte[] lengthHeader = new byte[4];
93 | int readLength = m_tcp.Receive(lengthHeader);
94 | if (readLength == 0)
95 | {
96 | yield break;
97 | }
98 | int length = BitConverter.ToInt32(lengthHeader, 0);
99 | // read variable length data
100 | byte[] data = new byte[length];
101 | int recvedLen = 0;
102 | while (recvedLen < length)
103 | {
104 | readLength = m_tcp.Receive(data, recvedLen, length - recvedLen, SocketFlags.None);
105 | if (readLength == 0)
106 | {
107 | yield break;
108 | }
109 | recvedLen += readLength;
110 | }
111 | yield return data;
112 | }
113 | }
114 |
115 | public void Dispose()
116 | {
117 | m_tcp.Dispose();
118 | GC.SuppressFinalize(this);
119 | }
120 | }
121 | }
122 |
--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
1 | GNU GENERAL PUBLIC LICENSE
2 | Version 3, 29 June 2007
3 |
4 | Copyright (C) 2007 Free Software Foundation, Inc.
5 | Everyone is permitted to copy and distribute verbatim copies
6 | of this license document, but changing it is not allowed.
7 |
8 | Preamble
9 |
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11 | software and other kinds of works.
12 |
13 | The licenses for most software and other practical works are designed
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15 | the GNU General Public License is intended to guarantee your freedom to
16 | share and change all versions of a program--to make sure it remains free
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18 | GNU General Public License for most of our software; it applies also to
19 | any other work released this way by its authors. You can apply it to
20 | your programs, too.
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23 | price. Our General Public Licenses are designed to make sure that you
24 | have the freedom to distribute copies of free software (and charge for
25 | them if you wish), that you receive source code or can get it if you
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27 | free programs, and that you know you can do these things.
28 |
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30 | these rights or asking you to surrender the rights. Therefore, you have
31 | certain responsibilities if you distribute copies of the software, or if
32 | you modify it: responsibilities to respect the freedom of others.
33 |
34 | For example, if you distribute copies of such a program, whether
35 | gratis or for a fee, you must pass on to the recipients the same
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39 |
40 | Developers that use the GNU GPL protect your rights with two steps:
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42 | giving you legal permission to copy, distribute and/or modify it.
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621 | END OF TERMS AND CONDITIONS
622 |
623 | How to Apply These Terms to Your New Programs
624 |
625 | If you develop a new program, and you want it to be of the greatest
626 | possible use to the public, the best way to achieve this is to make it
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628 |
629 | To do so, attach the following notices to the program. It is safest
630 | to attach them to the start of each source file to most effectively
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633 |
634 |
635 | Copyright (C)
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637 | This program is free software: you can redistribute it and/or modify
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640 | (at your option) any later version.
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642 | This program is distributed in the hope that it will be useful,
643 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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647 | You should have received a copy of the GNU General Public License
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649 |
650 | Also add information on how to contact you by electronic and paper mail.
651 |
652 | If the program does terminal interaction, make it output a short
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657 | This is free software, and you are welcome to redistribute it
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659 |
660 | The hypothetical commands `show w' and `show c' should show the appropriate
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662 | might be different; for a GUI interface, you would use an "about box".
663 |
664 | You should also get your employer (if you work as a programmer) or school,
665 | if any, to sign a "copyright disclaimer" for the program, if necessary.
666 | For more information on this, and how to apply and follow the GNU GPL, see
667 | .
668 |
669 | The GNU General Public License does not permit incorporating your program
670 | into proprietary programs. If your program is a subroutine library, you
671 | may consider it more useful to permit linking proprietary applications with
672 | the library. If this is what you want to do, use the GNU Lesser General
673 | Public License instead of this License. But first, please read
674 | .
675 |
--------------------------------------------------------------------------------
/PROTOCOL.md:
--------------------------------------------------------------------------------
1 | ## Protocol
2 | Simple Secure Chat use MessagePack for data serialization
3 | ### Ver
4 | 1.0
5 |
6 | ### Message Layout
7 | | Name | Length | Desc |
8 | | ------ | -------- | ---------------------------- |
9 | | Length | 4byte | msg length |
10 | | Data | variable | msg data with AES encryption |
11 |
12 | ### Data Layout
13 | *The number of parameters is variable and can be zero*
14 | | Name | Type | Desc |
15 | | ------ | -------- | -------- |
16 | | Type | byte | msg type |
17 | | Params | object[] | params |
18 |
19 | ### Message Type
20 | * 0x00 HELLO: Certificate
21 | * Client
22 | * NoParam
23 | * Server
24 | * Param0: byte[] ECDSA X.509 Certificate, public key only
25 | * 0x01 KEY: session key exchange
26 | * Client
27 | * Param0: byte[] BCRYPT_ECDH_PUBLIC_P521 blob
28 | * Server
29 | * NoParam
30 | * 0x02 NICK: Broadcast chat message to everyone
31 | * Server
32 | * Param0: string result
33 | * "OK": nickname ok
34 | * "other text": error message
35 | * Client
36 | * Param0: string nickname
37 | * 0x03 MSG: chat message
38 | * Server
39 | * Param0: string nickname
40 | * Param1: string messageText
41 | * Client
42 | * Param0: string messageText
43 | * 0xA0 SYS: system message
44 | * Server
45 | * Param0: string messageText
46 |
--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 | 
2 | Setup your own encrypted chat room in seconds.
3 |
4 | ## Quickstart
5 | Download server and client executable from [release](releases/latest)
6 |
7 | ## Roadmap
8 | 1. Zero configuration lan discovery
9 | 2. DHT/BT Tracker peer finding
10 | 3. migrate to EBAP Network Impl
11 | 4. macOS and Linux support
12 |
13 | ## Contribute
14 | You can contribute code directly, or submit issues you found
15 |
16 | ## License
17 | GPL v3
18 |
--------------------------------------------------------------------------------
/SimpleSecureChat.sln:
--------------------------------------------------------------------------------
1 |
2 | Microsoft Visual Studio Solution File, Format Version 12.00
3 | # Visual Studio Version 17
4 | VisualStudioVersion = 17.1.32414.318
5 | MinimumVisualStudioVersion = 10.0.40219.1
6 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ChatClient", "ChatClient\ChatClient.csproj", "{D41625F9-AAAA-4172-8926-5B7155203FFA}"
7 | EndProject
8 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ChatServer", "ChatServer\ChatServer.csproj", "{F926106D-3106-458A-A34E-B26E7EF9F2DF}"
9 | EndProject
10 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{A0912039-B2FB-4B4E-9E8E-EB7A6D8490E4}"
11 | ProjectSection(SolutionItems) = preProject
12 | LICENSE = LICENSE
13 | PROTOCOL.md = PROTOCOL.md
14 | README.md = README.md
15 | EndProjectSection
16 | EndProject
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18 | EndProject
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24 | EndGlobalSection
25 | GlobalSection(SolutionConfigurationPlatforms) = preSolution
26 | Debug|Any CPU = Debug|Any CPU
27 | Release|Any CPU = Release|Any CPU
28 | EndGlobalSection
29 | GlobalSection(ProjectConfigurationPlatforms) = postSolution
30 | {D41625F9-AAAA-4172-8926-5B7155203FFA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
31 | {D41625F9-AAAA-4172-8926-5B7155203FFA}.Debug|Any CPU.Build.0 = Debug|Any CPU
32 | {D41625F9-AAAA-4172-8926-5B7155203FFA}.Release|Any CPU.ActiveCfg = Release|Any CPU
33 | {D41625F9-AAAA-4172-8926-5B7155203FFA}.Release|Any CPU.Build.0 = Release|Any CPU
34 | {F926106D-3106-458A-A34E-B26E7EF9F2DF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
35 | {F926106D-3106-458A-A34E-B26E7EF9F2DF}.Debug|Any CPU.Build.0 = Debug|Any CPU
36 | {F926106D-3106-458A-A34E-B26E7EF9F2DF}.Release|Any CPU.ActiveCfg = Release|Any CPU
37 | {F926106D-3106-458A-A34E-B26E7EF9F2DF}.Release|Any CPU.Build.0 = Release|Any CPU
38 | EndGlobalSection
39 | GlobalSection(SolutionProperties) = preSolution
40 | HideSolutionNode = FALSE
41 | EndGlobalSection
42 | GlobalSection(ExtensibilityGlobals) = postSolution
43 | SolutionGuid = {231E1B8A-56FC-4306-AE82-D8B6AEE9EC30}
44 | EndGlobalSection
45 | EndGlobal
46 |
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/docs/banner.jpg:
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https://raw.githubusercontent.com/StoneMoe/SimpleSecureChat/b4764da97c0e1b8849d11ad7befcf2e08dde8cdd/docs/banner.jpg
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