Nedo.AspNet.Authentication.Google 2.0.9

.NET 9.0 This package targets .NET 9.0. The package is compatible with this framework or higher. 
dotnet add package Nedo.AspNet.Authentication.Google --version 2.0.9
                    


                    

                
NuGet\Install-Package Nedo.AspNet.Authentication.Google -Version 2.0.9
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="Nedo.AspNet.Authentication.Google" Version="2.0.9" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Nedo.AspNet.Authentication.Google" Version="2.0.9" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Nedo.AspNet.Authentication.Google" />
                    


                            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 Nedo.AspNet.Authentication.Google --version 2.0.9
                    


                    

                
#r "nuget: Nedo.AspNet.Authentication.Google, 2.0.9"
#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 Nedo.AspNet.Authentication.Google@2.0.9
#: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=Nedo.AspNet.Authentication.Google&version=2.0.9
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Nedo.AspNet.Authentication.Google&version=2.0.9
                    


                            Install as a Cake Tool

Nedo.AspNet.Authentication.Google

"Sign in with Google" — your app mints its own JWTs after verifying a Google-issued ID token from Google Identity Services on the SPA side. Pairs with Nedo.AspNet.Authentication.Local for the user store, refresh-token families, and account linking.

Install

dotnet add package Nedo.AspNet.Authentication.Google

Quickstart

using Nedo.AspNet.Authentication.Google;

builder.Services.AddGoogle(opts =>
{
    opts.ClientId = builder.Configuration["Google:ClientId"]!;
});

var app = builder.Build();
app.MapLocalAuth();
app.MapLocalAccount();
app.MapGoogleAuth();   // POST /auth/google { idToken, intent? }

Frontend (SPA)

Use Google Identity Services (https://accounts.google.com/gsi/client) to render the button and obtain an ID token, then POST it to your API:

google.accounts.id.initialize({
  client_id: GOOGLE_CLIENT_ID,
  callback: async ({ credential }) => {
    const tokens = await fetch('/auth/google', {
      method: 'POST',
      headers: { 'content-type': 'application/json' },
      body: JSON.stringify({ idToken: credential, intent: 'signin' }),
    }).then(r => r.json());
  },
});
google.accounts.id.renderButton(document.getElementById('google-btn'), { theme: 'filled_blue' });

Sign-in vs sign-up intent

The intent field controls account-creation behaviour:

Intent Behaviour
"signin" Reject brand-new identities — must already have a linked local account. Returns AUTH-LOCAL-019 if none.
"signup" (or omit) Create a new account if none exists. Returns AuthOutcome.PendingSignup (asks user to pick a username) when RequireUsernameOnSocialSignIn = true (default).

Use this to make the "Sign in with Google" button on /login reject new accounts (rejecting the impostor flow where an attacker signs up under your domain) while the "Create account with Google" button on /register allows them.

Console setup

  1. Go to https://console.cloud.google.com/apis/credentials.
  2. Create credentials → OAuth client ID → Application type Web application.
  3. Add your SPA origin to Authorized JavaScript origins (https://app.example.com, http://localhost:5173).
  4. Copy the client ID into appsettings.json → Google:ClientId.

Full walkthrough: docs/providers/social/google.md.

Package Role
Nedo.AspNet.Authentication.Local Required peer — provides the user store + token issuer + account linking.
Nedo.AspNet.Authentication.Oidc Transitive — shared OIDC validation base class.

License

MIT — see LICENSE.

Product Compatible and additional computed target framework versions.
.NET net9.0 is compatible.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  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
2.0.9 97 5/11/2026
2.0.8 86 5/6/2026
2.0.7 91 5/5/2026
2.0.6 85 5/5/2026
2.0.4 83 5/4/2026
2.0.3 82 5/4/2026
2.0.2 90 5/2/2026
2.0.1 99 5/2/2026
2.0.0 89 5/1/2026