TimeStampClient

Easy to use .NET RFC 3161 time-stamp client library and applications based on Bouncy Castle library.

TimeStampClient:

runs on Windows, Linux and macOS
supports Time-Stamp Protocol over HTTP/HTTPS and TCP
supports SSL authentication (client certificate) and HTTP basic authentication (login and password)
uses system HTTP proxy settings
contains GUI application
contains command line application
contains reusable .NET library

Download

There are multiple release artifacts available:

TimeStampClient.nupkg - NuGet package with reusable .NET library
TimeStampClient.snupkg - NuGet package with debug symbols for reusable .NET library
TimeStampClientCmd.zip - Command line tool usable on Windows, Linux and macOS
TimeStampClientGui.Linux.zip - GUI application usable on Linux
TimeStampClientGui.MacOs.zip - GUI application usable on macOS
TimeStampClientGui.Windows.zip - GUI application usable on Windows

Official NuGet package is published in nuget.org repository.

Usage

TimeStampClient Library

In most cases you just need the following single line of code to get a time-stamp.

var timeStampToken = Disig.TimeStampClient.TimeStampClient.RequestTimeStampToken("http://localhost/tsa", "document.docx");

TimeStampClient command line application

.NET 5.0 runtime is required on all platforms in order to use TimeStampClientCmd application.

Getting time-stamp using the command line application on Windows:

> TimeStampClientCmd.exe --tsa http://localhost/tsa --file document.docx --out token.tst

Getting time-stamp using the command line application on Linux and macOS:

$ dotnet ./TimeStampClientCmd.dll --tsa http://localhost/tsa --file document.docx --out token.tst

TimeStampClient GUI application

On Windows:

Extract TimeStampClientGui.Windows.zip archive
Start the application by double-clicking on TimeStampClientGui.exe file

On Linux:

Install .NET 5.0 runtime
Extract TimeStampClientGui.Linux.zip archive
Start the application with the following command:
```
$ dotnet ./TimeStampClientGui.Linux.dll
```

On macOS:

Install .NET 5.0 runtime
Extract TimeStampClientGui.MacOs.zip archive

Execute following commands from command line:

$ chmod +x TimeStampClientGui.MacOs.app/Contents/MacOS/TimeStampClientGui.MacOs
$ xattr -c TimeStampClientGui.MacOs.app

Start the application by double-clicking on its icon

User needs to specify the URL of a time-stamping authority in the "TSA service URL" field and the path to a file to be time-stamped in the "File to time-stamp" field. After clicking on the "Request time-stamp" button the time-stamp token is saved to the file specified in the "Output file" field.

License

TimeStampClient library and applications are available under the terms of the Apache License, Version 2.0.
Human friendly license summary is available at tldrlegal.com but the full license text always prevails.

About

TimeStampClient library and applications are provided by Disig a.s.

disig/TimeStampClient