HCS.Passwordless.WebAuthn 2.0.2

.NET 10.0 This package targets .NET 10.0. The package is compatible with this framework or higher. 
dotnet add package HCS.Passwordless.WebAuthn --version 2.0.2
                    


                    

                
NuGet\Install-Package HCS.Passwordless.WebAuthn -Version 2.0.2
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="HCS.Passwordless.WebAuthn" Version="2.0.2" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="HCS.Passwordless.WebAuthn" Version="2.0.2" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="HCS.Passwordless.WebAuthn" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add HCS.Passwordless.WebAuthn --version 2.0.2
                    


                    

                
#r "nuget: HCS.Passwordless.WebAuthn, 2.0.2"
#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. 
#:package HCS.Passwordless.WebAuthn@2.0.2
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=HCS.Passwordless.WebAuthn&version=2.0.2
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=HCS.Passwordless.WebAuthn&version=2.0.2
                    


                            Install as a Cake Tool

HCS.Passwordless.WebAuthn

WebAuthn / FIDO2 passkey add-on for HCS.Passwordless. Enables hardware-backed biometric or security-key authentication for Umbraco members using the browser's Credential Management API.

Requirements

  • Umbraco 17.3.5 or later ([17.3.5, 18.0.0))
  • A browser that supports WebAuthn (all modern browsers)
  • HCS.Passwordless.Core is pulled in automatically as a transitive dependency

Installation

dotnet add package HCS.Passwordless.WebAuthn

Setup

1. Register (Program.cs)

builder.CreateUmbracoBuilder()
    .AddBackOffice()
    .AddWebsite()
    .AddPasswordlessWebAuthn()
    .Build();

2. Configure (appsettings.json)

{
  "HCS": {
    "Authentication": {
      "WebAuthn": {
        "Enabled": true,
        "RpName": "My Site",
        "Origins": [ "https://example.com" ]
      }
    }
  }
}

Important: Origins must exactly match the origin of the site as seen by the browser, including scheme and port.

3. Add passkey UI partials

@* Sign-in *@
@await Html.PartialAsync("Passwordless/PasskeySignInButton")

@* On a member profile/settings page: *@
@await Html.PartialAsync("Passwordless/PasskeyRegisterButton")
@await Html.PartialAsync("Passwordless/PasskeyCredentialList")

Configuration Options

HCS:Authentication:WebAuthn

Key Type Default Description
Enabled bool false Enable/disable WebAuthn flow
RpName string Umbraco Site Relying party display name shown to the user
Origins string[] [] Allowed origins (must match browser origin exactly)

Endpoints

Method Path Description
POST /auth/webauthn/register/options Get registration challenge
POST /auth/webauthn/register/complete Complete credential registration
POST /auth/webauthn/signin/options Get authentication challenge
POST /auth/webauthn/signin/complete Complete authentication and sign in
GET /auth/webauthn/credentials List member's registered credentials
PATCH /auth/webauthn/credentials/{id} Rename a credential
DELETE /auth/webauthn/credentials/{id} Remove a credential

Database Migration

The package adds a MemberCredential table to the Umbraco database via Umbraco's migration system. This runs automatically on startup.

Security Notes

  • Challenge state is stored in distributed cache and is single-use.
  • Counter regression (a credential reporting a lower sign-count than previously recorded) triggers a PasskeyCounterRegressionNotification so the site can alert the member of a potential cloned authenticator.
  • WebAuthn requires HTTPS in production. localhost is allowed for development.

Replacing Services

Interface Default Purpose
IWebAuthnChallengeStore Distributed cache implementation Store WebAuthn challenges
IMemberCredentialStore UmbracoDbMemberCredentialStore Persist credentials in Umbraco DB
Product Compatible and additional computed target framework versions.
.NET net10.0 is compatible.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

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
2.0.2 77 5/18/2026
2.0.1 92 5/18/2026
2.0.0 79 5/18/2026
2.0.0-beta002 82 5/18/2026
2.0.0-beta001 71 5/18/2026
1.0.1 78 5/18/2026
1.0.0 77 5/18/2026
1.0.0-beta002 73 5/18/2026
1.0.0-beta001 72 5/18/2026