Easy-X25519 1.0.0

dotnet add package Easy-X25519 --version 1.0.0
NuGet\Install-Package Easy-X25519 -Version 1.0.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="Easy-X25519" Version="1.0.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Easy-X25519 --version 1.0.0
#r "nuget: Easy-X25519, 1.0.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install Easy-X25519 as a Cake Addin
#addin nuget:?package=Easy-X25519&version=1.0.0

// Install Easy-X25519 as a Cake Tool
#tool nuget:?package=Easy-X25519&version=1.0.0

X25519 in C#

A simple library based on Golang's Curve25519 library.

Features

  • Easy to use front end
  • Completely re written the Golang's crypto library in C#
  • Nearly fast (about 3000 Keys and Agreements/s)
  • Universal library with .Net Standard (You can also use this library anywhere in .Net (Read more below)

Install

Use Nuget

Install-Package Easy-X25519

Link to library on Nuget

Usage

Key Generation

var alice = X25519KeyAgreement.GenerateKeyPair();

In this example, alice is X25519KeyPair struct that contains public key and private key as 32 byte length byte arrays.

Key Agreement

// generate keys
var alice = X25519KeyAgreement.GenerateKeyPair();
var bob = X25519KeyAgreement.GenerateKeyPair();
// generate shared secret
var shared1 = X25519KeyAgreement.Agreement(alice.PrivateKey, bob.PublicKey);
var shared2 = X25519KeyAgreement.Agreement(bob.PrivateKey, alice.PublicKey);
// now the shared1 and shared2 must be same

Use in older versions of .Net

This library is built with .Net Standard 2; Means that minimum frameworks are .Net Core 2 and .Net framework 4.6.1. Full list. You might want to use this library in .Net 2. It's easy to make this library in earlier version of .Net

Note: Due to usage of RNGCryptoServiceProvider this library is not compatible with .Net Core 1.X.

Here are steps to include this library in your project:

  1. At first copy Internal.cs and X25519.cs from here into your project.
  2. If you are using .Net Framework 4 or lower, you will get an error because IReadonlyList is available since .Net framework 4.5. To fix this problem, just change IReadOnlyList<byte> in Internal.cs to byte[]. This should fix the problem.
  3. Use the library

Benchmarks

These benchmarks are done with .Net Core 3.1 on Intel-i7 4790K 4.0GHz.

Full key agreement done in 00:00:00.0093703
Key generation done in 00:00:00.3615465. That is about 2770 keys/sec
Key agreements done in 00:00:00.2800316. That is about 3571 agreement/sec

I also benchmarked the curve25519_generic (not the assembly one) and this library is about twice slower than Golang. Golang key agreement was about 6625 agreement/s.

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.
  • .NETStandard 2.0

    • No dependencies.

NuGet packages (1)

Showing the top 1 NuGet packages that depend on Easy-X25519:

Package Downloads
Cosm.Net.Secret

Package Description

GitHub repositories (1)

Showing the top 1 popular GitHub repositories that depend on Easy-X25519:

Repository Stars
UWPX/UWPX-Client
A WIP secure XMPP client for UWP (Windows 10) devices.
Version Downloads Last updated
1.0.0 5,830 3/19/2020

Initial Release