Add section about setting up the IdentityServer key in prodution

[DrewBrasher]

I created a Blazor WebAssembly hosted app with individual authentication using the template in Visual Studio. It works fine running the app in visual studio but after I deploy it to an Ubuntu server I get this error: "No signing credential is configured by the 'IdentityServer:Key' configuration section."

The appsettings.json section generated by the template is:

  "IdentityServer": {
    "Clients": {
      "Bledger.Client": {
        "Profile": "IdentityServerSPA"
      }
    }
  }

It would be helpful if the documentation for deploying to a Linux server would include how to create the credentials and configure the the appsettings section.

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• ID: dcdd2c35-bf2b-2673-d150-303a8aaa54d2
• Version Independent ID: 815fe034-c9fc-aee3-a8b5-f2e860b30302
• Content: Host ASP.NET Core on Linux with Nginx
• Content Source: aspnetcore/host-and-deploy/linux-nginx.md
• Product: aspnet-core
• Technology: aspnetcore-hostdeploy
• GitHub Login: @Rick-Anderson
• Microsoft Alias: riande

[guardrex]

Hello @DrewBrasher ... We document Blazor in the Blazor node. The coverage on this aspect is at ...

https://learn.microsoft.com/en-us/aspnet/core/blazor/security/webassembly/hosted-with-identity-server?view=aspnetcore-7.0&tabs=visual-studio#app-settings

[guardrex]

I might not have fully understood your ask, per your remark ...

create the credentials and configure the the appsettings section.

The coverage that we carry for IdS with Blazor WebAssembly is for the hosted Blazor WebAssembly hosting model and found in the topic that I cross-referenced. We don't have further guidance to share. Any additional configuration and use of IdS generally is up to the Duende IdS docs to cover, as we're just trying to cover the base case with minimal configuration. We link to their docs from our doc.

[guardrex]

Within that topic, we have some coverage on this. It's focused on an Azure-hosting scenario; so if you plan to host in Azure, it might be exactly what you're looking for. If not hosting in Azure, you may still get the main concepts out of it for your host setup ...

https://learn.microsoft.com/en-us/aspnet/core/blazor/security/webassembly/hosted-with-identity-server?view=aspnetcore-7.0&tabs=visual-studio#host-in-azure-app-service-with-a-custom-domain-and-certificate

[DrewBrasher]

I did see that documentation and it was somewhat helpful even though I'm not using Azure. I was able to get it working based on various different sources I found by generating a .pfx file, putting it in the application root, and defining the key section in the appsettings.json to use a file like this:

  "IdentityServer": {
    "Key": {
      "Type": "File",
      "FilePath": "yourkey.pfx",
      "Password": "YourPassword"
    },
    "Clients": {
      "Bledger.Client": {
        "Profile": "IdentityServerSPA"
      }
    }
  }

I just thought it would be nice if the documentation on hosting on a Linux server at least mentioned that you have to create a key and define it for the app to work or even better, told specifically how to to it on Linux.

[guardrex]

I don't think we want to pitch certificate file-based key security like that. Even Duende doesn't pitch that. AFAICT, they don't even mention it 🙉.

Our examples are more in the vein of using Azure Key Vault or a certificate store. I think the Blazor doc should stick with the Azure pitch.

WRT any other key management strategies, Duende IdS docs should cover them. Of course, that's not a MS product, and we don't have anything to do with their docs. IIRC from when I wrote up that Blazor section a few years ago, they have docs on the subject.

you have to create a key and define it for the app to work

It's my impression that that's not required for automatic key management ***IF*** ASP.NET Core Data Protection is configured. I'm thinking along the lines of ...

https://learn.microsoft.com/en-us/aspnet/core/security/data-protection/configuration/overview?view=aspnetcore-7.0#protectkeyswith

... with the PFX cert to configure DP, then ... hopefully 🤞 ... automatic key management would ✨ Just Work!™ ✨. Of course, I'm guessing. I was just under the impression that they default that way without key configuration, and they rely upon ASP.NET Core DP to do that. Do you have any further information on that aspect ... or did you try that approach?

[guardrex]

Let's let @Rick-Anderson take a look and decide for the main doc set doc here.

Rick, I'm going to leave the Blazor doc (Hosted WASM with IdS) on the Azure Key Vault approach.

I don't know what happens if ...

https://learn.microsoft.com/en-us/aspnet/core/security/data-protection/configuration/overview?view=aspnetcore-7.0#protectkeyswith

... is attempted ... idk if automatic key management will just work properly (no additional configuration) with that or not.

Anyway ... if you want to cover passing the cert and a PW to the config like that for IdentityServer:Key, I'll let you schedule this for work. I'm going to remove the Blazor label/project from the issue. Note that AFAICT Duende IdS docs don't cover the appsettings.json config for this. I think they want DP configured from looking at what they state.