OneTimePassword 1.0.0-alpha1

.NET Standard 2.0
This is a prerelease version of OneTimePassword.
dotnet add package OneTimePassword --version 1.0.0-alpha1
NuGet\Install-Package OneTimePassword -Version 1.0.0-alpha1
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="OneTimePassword" Version="1.0.0-alpha1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add OneTimePassword --version 1.0.0-alpha1
#r "nuget: OneTimePassword, 1.0.0-alpha1"
#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 OneTimePassword as a Cake Addin
#addin nuget:?package=OneTimePassword&version=1.0.0-alpha1&prerelease

// Install OneTimePassword as a Cake Tool
#tool nuget:?package=OneTimePassword&version=1.0.0-alpha1&prerelease


RFC 4226 (HOTP) and RFC 6238 (TOTP) implementation for .NET, also supports parsing Key Uri Format for Google Authenticator Uris and Steam's custom TOTP implementation.

This library does not include server side validation logic, however you can implement your own logic using this library according to your security requirements.


To be published on Nuget soon

Usage examples

From Uri

AuthenticatorAccount.TryParse("otpauth://totp/", out var account); 
var password = account.GeneratePassword().Password;

From custom parameters

using (var hmac = HMAC.Create("HMACSHA1"))
    var length = 6;
    var time = DateTimeOffset.Now;
    var period = TimeSpan.FromSeconds(30);
    var secret = Encoding.ASCII.GetBytes("12345678901234567890");
    var password = new TimeBasedAuthenticator().GeneratePassword(length, hmac, secret, time, period).Password;


Copyright 2019 Prajay Basu

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

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

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

    • No dependencies.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
1.0.0-alpha1 298 9/22/2019