Added authlib support

.env.example

@@ -18,3 +18,7 @@ SUPPORT_MOJANG_FALLBACK=FALSE #[no_mojang_namespace]
 SUPPORT_MOJANG_TELEMETRY_BLOCKER=TRUE #[enable_mojang_anti_features]
 SUPPORT_PROFILE_KEY=TRUE #[enable_profile_key]
 SUPPORT_ONLY_DEFAULT_USERNAME=true #[username_check]
+SUPPORT_REGISTER=TRUE
+REGISTER_ENDPOINT="/register"
+HOMEPAGE_URL=
+SERVER_NAME="Yggdrasil"

eslint.config.js

@@ -3,7 +3,7 @@ const globals = require("globals")
 
 module.exports = [
     {
-        ignores: ["node_modules", "logs", "coverage", ".env", "*.log"],
+        ignores: ["node_modules", "data", "logs", "coverage", ".env", "*.log"],
     },
     js.configs.recommended,
     {

routes/index.js

@@ -0,0 +1,17 @@
+const express = require("express")
+const router = express.Router()
+const utils = require("../modules/utils")
+const serverService = require("../services/serverService")
+
+if (utils.isTrueFromDotEnv("SUPPORT_AUTHLIB_INJECTOR")) {
+    router.get("", (req, res) => {
+        const hostname = req.hostname
+        const metadata = serverService.getServerMetadata(hostname)
+        res.header("X-Authlib-Injector-Date", new Date().toISOString())
+        return res.status(200).json(metadata)
+    })
+} else {
+    router.get("", (req, res, next) => next())
+}
+
+module.exports = router

services/serverService.js

@@ -0,0 +1,39 @@
+const certs = require("../modules/certificatesManager")
+const utils = require("../modules/utils")
+const package = require("../package.json")
+
+function getServerMetadata(hostname) {
+    const keys = certs.getKeys()
+    const publicKeyPEM = keys.playerCertificateKeys.public
+
+    const serverMeta = {
+        meta: {
+            serverName: process.env.SERVER_NAME || "Yggdrasil Server",
+            implementationName: package.name,
+            implementationVersion: package.version,
+            
+            "feature.legacy_skin_api": utils.isTrueFromDotEnv("SUPPORT_LEGACY_SKIN_API"),
+            "feature.no_mojang_namespace": utils.isTrueFromDotEnv("SUPPORT_MOJANG_FALLBACK"),
+            "feature.enable_mojang_anti_features": utils.isTrueFromDotEnv("SUPPORT_MOJANG_TELEMETRY_BLOCKER"),
+            "feature.enable_profile_key": utils.isTrueFromDotEnv("SUPPORT_PROFILE_KEY"),
+            "feature.username_check": utils.isTrueFromDotEnv("SUPPORT_ONLY_DEFAULT_USERNAME"),
+
+            links: {
+                homepage: process.env.HOMEPAGE_URL || `http://${hostname}`,
+            }
+        },
+        skinDomains: [
+            hostname,
+            `.${hostname}`
+        ],
+        signaturePublickey: publicKeyPEM
+    }
+    if (utils.isTrueFromDotEnv("SUPPORT_REGISTER")) {
+        serverMeta.meta.links.register = process.env.REGISTER_ENDPOINT || `http://${hostname}/register`
+    }
+    return serverMeta
+}
+
+module.exports = {
+    getServerMetadata
+}