TlsCertificateLoader 1.1.1

TlsCertificateLoader

Allows loading of TLS (HTTPS) certificates for .NET 6.0 Kestrel web applications, allowing for refreshing of certificates as well as compatibility with HTTP/3. Fully compatible with certificates obtained by Certbot.

To use:

TlsCertificateLoader.TlsCertificateLoader tlsCertificateLoader = new(fullChainPemFilePath, privateKeyPemFilePath);
options.ListenAnyIp(433, o =>
{
     o.SetTlsHandshakeCallbackOptions(tlsCertificateLoader);
     o.SetHttpsConnectionAdapterOptions(tlsCertificateLoader);
     o.Protocols = HttpProtocols.Http1AndHttp2AndHttp3;
});

And to refresh (eg either on a Timer or watching a directory via PhysicalFileProvider):

tlsCertificateLoader.RefreshDefaultCertificates();

You may also add additional certificate collection for other hostnames (for example if you want to set up mydomain.tld as your default certificate and www.mydomain.tld as your alternate one):

tlsCertificateLoader.AddAdditionalCertificates("www.mydomain.tld", fullChainWwwPemFilePath, privateKeyWwwPemFilePath);

And to refresh additional certificate collections (eg either on a Timer or watching a directory via PhysicalFileProvider):

tlsCertificateLoader.RefreshAdditionalCertificates("www.mydomain.tld");

A sample project using Certbot is available.

Credits

David Fowler for this idea.

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