Blazor and multiple auth providers

[aL3891]

I was have some issues getting blazor to work in a solution with multiple auth middleware like AzureAD and AzureADBearer and the problem was that i needed to add an Authorize with AuthenticationSchemes set.

This however can only be done globally since that property can't be specified on the Component level. Instead as, per the discussion below, i can call endpoints.MapBlazorHub().RequireAuthorization(new AuthorizeAttribute { AuthenticationSchemes = AzureADDefaults.AuthenticationScheme }); but that is not documented on this page.

I think it would be good to add because blazor is probably going to be used for a lot of back office apps where people want to ensure there is no unauthenticated access

The issue where this discussion was has is dotnet/aspnetcore#14916

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Document Details

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• ID: c9942b0a-a7fb-0d34-9201-af0963affa9e
• Version Independent ID: 19770710-5225-a1ea-e082-65da6ba4a49a
• Content: ASP.NET Core Blazor authentication and authorization
• Content Source: aspnetcore/security/blazor/index.md
• Product: aspnet-core
• Technology: aspnetcore-security
• GitHub Login: @guardrex
• Microsoft Alias: riande

[guardrex]

Cross-linking a few existing topics for authn/authz ...

• Social login provider tokens+claims for Blazor auth
• Google Social login provider for Blazor
• Token Based Authorization using IdentityServer with Blazor
• Signalr Context.User missing on hub
• Logout Flow
• Blazor auth topic enhancements
• Blazor and multiple auth providers
• How to Access Windows Auth User, when in C# Model?