Steam OpenID Connect Identity Provider (IdP)
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Steam OpenId Connect Provider

Steam OpenID 2.0 -> OpenID Connect Provider Proxy

About

Steam still uses the old OpenID 2.0 authentication protocol. Since ImperialPlugins.com has migrated to KeyCloak we were unable to migrate our old Steam logins as KeyCloak does not support OpenID 2.0.

This server will act as an OpenID Connect provider which will provide Steam authentication for you. This way you can use Steam logins in KeyCloak or any other OpenID Connect based authentication client.

Note: only "openid" and "profile" scopes are supported due limitations by Valve/Steam.

Setup

Add your Steam API Key as user-secrets like this: dotnet user-secrets set "Authentication:Steam:ApplicationKey" "MySteamApiKey"

Alternatively you can set it up via environment variables: -e Authentication__Steam__ApplicationKey: 'Your Steam ApiKey (Keep in mind that this is easier but more insecure)

After that set up your redirect URI, ClientID and ClientSecret in the appsettings.json.

OpenID Configuration

You can access Authorization and Token endpoint details in http:///.well-known/openid-configuration

HTTPS Support

This server does not support https connections. If you want to use https connections please reverse proxy like nginx.

Running behind reverse proxies

Some reverse proxy set ups might require a special set up, like setting the path base or origin manually.

To set the origin, set Hosting:PublicOrigin in your configuration or the Hosting__PublicOrigin environment variable to your desired origin. If not set, the origin name is inferred from the request.

Similary, to set the path base, you can set Hosting:PathBase or the Hosting__PathBase environment variable. If not set, it will default to "/".

Health checks

This service contains a health check endpoint at /health. It checks if the Steam login server is up.

Docker

A docker image is also available.

docker run -it \
    -e OpenID__RedirectUri=http://localhost:8080/auth/realms/master/broker/steam/endpoint \
    -e OpenID__ClientID=steamidp \ 
    -e OpenID__ClientSecret=mysecret \
    -e Authentication__Steam__ApplicationKey=MySteamApiKey \
    --restart unless-stopped \
    --name steamidp \
    imperialplugins/steam-openid-connect-provider

License

MIT