Add EAB for ACME

README.md

@@ -8,6 +8,7 @@
 - `REDIRECT_RAW_INFO` (default: https://docs.codeberg.org/pages/raw-content/): info page for raw resources, shown if no resource is provided.
 - `ACME_API` (default: https://acme.zerossl.com/v2/DV90): set this to https://acme.mock.director to use invalid certificates without any verification (great for debugging). ZeroSSL is used as it doesn't have rate limits and doesn't clash with the official Codeberg certificates (which are using Let's Encrypt).
 - `ACME_EMAIL` (default: `noreply@example.email`): Set this to "true" to accept the Terms of Service of your ACME provider.
+- `ACME_EAB_KID` &  `ACME_EAB_HMAC` (default: don't use EAB): EAB credentials, for example for ZeroSSL.
 - `ACME_ACCEPT_TERMS` (default: use self-signed certificate): Set this to "true" to accept the Terms of Service of your ACME provider.
 - `DNS_PROVIDER` (default: use self-signed certificate): Code of the ACME DNS provider for the main domain wildcard.  
   See https://go-acme.github.io/lego/dns/ for available values & additional environment variables.

certificates.go

@@ -204,11 +204,23 @@ func newAcmeClient(configureChallenge func(*resolver.SolverManager) error) *lego
 	}
 
 	// accept terms
-	reg, err := acmeClient.Registration.Register(registration.RegisterOptions{TermsOfServiceAgreed: os.Getenv("ACME_ACCEPT_TERMS") == "true"})
-	if err != nil {
-		panic(err)
+	if os.Getenv("ACME_EAB_KID") == "" || os.Getenv("ACME_EAB_HMAC") == "" {
+		reg, err := acmeClient.Registration.Register(registration.RegisterOptions{TermsOfServiceAgreed: os.Getenv("ACME_ACCEPT_TERMS") == "true"})
+		if err != nil {
+			panic(err)
+		}
+		myUser.Registration = reg
+	} else {
+		reg, err := acmeClient.Registration.RegisterWithExternalAccountBinding(registration.RegisterEABOptions{
+			TermsOfServiceAgreed: os.Getenv("ACME_ACCEPT_TERMS") == "true",
+			Kid: os.Getenv("ACME_EAB_KID"),
+			HmacEncoded: os.Getenv("ACME_EAB_HMAC"),
+		})
+		if err != nil {
+			panic(err)
+		}
+		myUser.Registration = reg
 	}
-	myUser.Registration = reg
 
 	return acmeClient
 }

handler.go

@@ -148,7 +148,7 @@ func handler(ctx *fasthttp.RequestCtx) {
 		targetOwner = pathElements[0]
 		targetRepo = pathElements[1]
 
-		// raw.codeberg.page/example/myrepo/@main/index.html
+		// raw.codeberg.org/example/myrepo/@main/index.html
 		if len(pathElements) > 2 && strings.HasPrefix(pathElements[2], "@") {
 			s.Step("raw domain preparations, now trying with specified branch")
 			if tryBranch(targetRepo, pathElements[2][1:], pathElements[3:],