Add support for SNI (Server Name Indication) for the HTTP server

extensions/vertx-http/deployment/src/test/resources/conf/ssl-pem.conf

@@ -1,6 +1,6 @@
 # Enable SSL, configure the key store
-quarkus.http.ssl.certificate.file=server-cert.pem
-quarkus.http.ssl.certificate.key-file=server-key.pem
+quarkus.http.ssl.certificate.files=server-cert.pem
+quarkus.http.ssl.certificate.key-files=server-key.pem
 # Test that server starts with this option
 # See https://github.com/quarkusio/quarkus/issues/8336
 quarkus.http.insecure-requests=disabled

extensions/vertx-http/runtime/src/main/java/io/quarkus/vertx/http/runtime/CertificateConfig.java

@@ -1,6 +1,7 @@
 package io.quarkus.vertx.http.runtime;
 
 import java.nio.file.Path;
+import java.util.List;
 import java.util.Optional;
 
 import io.quarkus.runtime.annotations.ConfigGroup;
@@ -10,19 +11,43 @@
  * A certificate configuration. Either the certificate and key files must be given, or a key store must be given.
  */
 @ConfigGroup
+@SuppressWarnings("OptionalUsedAsFieldOrParameterType")
 public class CertificateConfig {
+
     /**
      * The file path to a server certificate or certificate chain in PEM format.
+     *
+     * @deprecated Use {@link #files} instead.
      */
     @ConfigItem
+    @Deprecated
     public Optional<Path> file;
 
+    /**
+     * The list of path to server certificates using the PEM format.
+     * Specifying multiple files require SNI to be enabled.
+     */
+    @ConfigItem
+    public Optional<List<Path>> files;
+
     /**
      * The file path to the corresponding certificate private key file in PEM format.
+     *
+     * @deprecated Use {@link #keyFiles} instead.
      */
     @ConfigItem
+    @Deprecated
     public Optional<Path> keyFile;
 
+    /**
+     * The list of path to server certificates private key file using the PEM format.
+     * Specifying multiple files require SNI to be enabled.
+     *
+     * The order of the key files must match the order of the certificates.
+     */
+    @ConfigItem
+    public Optional<List<Path>> keyFiles;
+
     /**
      * An optional key store which holds the certificate information instead of specifying separate files.
      */

extensions/vertx-http/runtime/src/main/java/io/quarkus/vertx/http/runtime/ServerSslConfig.java

@@ -30,4 +30,11 @@ public class ServerSslConfig {
     @ConfigItem(defaultValue = "TLSv1.3,TLSv1.2")
     public List<String> protocols;
 
+    /**
+     * Enables Server Name Indication (SNI), an TLS extension allowing the server to use multiple certificates.
+     * The client indicate the server name during the TLS handshake, allowing the server to select the right certificate.
+     */
+    @ConfigItem(defaultValue = "false")
+    public boolean sni;
+
 }

extensions/vertx-http/runtime/src/main/java/io/quarkus/vertx/http/runtime/VertxHttpRecorder.java

@@ -53,6 +53,7 @@
 import io.quarkus.runtime.ShutdownContext;
 import io.quarkus.runtime.annotations.Recorder;
 import io.quarkus.runtime.configuration.ConfigInstantiator;
+import io.quarkus.runtime.configuration.ConfigurationException;
 import io.quarkus.runtime.configuration.MemorySize;
 import io.quarkus.runtime.shutdown.ShutdownConfig;
 import io.quarkus.vertx.core.runtime.VertxCoreRecorder;
@@ -578,9 +579,24 @@ private static HttpServerOptions createSslOptions(HttpBuildTimeConfig buildTimeC
         }
 
         ServerSslConfig sslConfig = httpConfiguration.ssl;
-        //TODO: static fields break config
+
         final Optional<Path> certFile = sslConfig.certificate.file;
         final Optional<Path> keyFile = sslConfig.certificate.keyFile;
+        final List<Path> keys = new ArrayList<>();
+        final List<Path> certificates = new ArrayList<>();
+        if (sslConfig.certificate.keyFiles.isPresent()) {
+            keys.addAll(sslConfig.certificate.keyFiles.get());
+        }
+        if (sslConfig.certificate.files.isPresent()) {
+            certificates.addAll(sslConfig.certificate.files.get());
+        }
+        if (keyFile.isPresent()) {
+            keys.add(keyFile.get());
+        }
+        if (certFile.isPresent()) {
+            certificates.add(certFile.get());
+        }
+
         final Optional<Path> keyStoreFile = sslConfig.certificate.keyStoreFile;
         final String keystorePassword = sslConfig.certificate.keyStorePassword;
         final Optional<Path> trustStoreFile = sslConfig.certificate.trustStoreFile;
@@ -599,8 +615,8 @@ private static HttpServerOptions createSslOptions(HttpBuildTimeConfig buildTimeC
         serverOptions.setMaxFormAttributeSize(httpConfiguration.limits.maxFormAttributeSize.asBigInteger().intValueExact());
         setIdleTimeout(httpConfiguration, serverOptions);
 
-        if (certFile.isPresent() && keyFile.isPresent()) {
-            createPemKeyCertOptions(certFile.get(), keyFile.get(), serverOptions);
+        if (!certificates.isEmpty() && !keys.isEmpty()) {
+            createPemKeyCertOptions(certificates, keys, serverOptions);
         } else if (keyStoreFile.isPresent()) {
             final Path keyStorePath = keyStoreFile.get();
             final Optional<String> keyStoreFileType = sslConfig.certificate.keyStoreFileType;
@@ -649,6 +665,7 @@ private static HttpServerOptions createSslOptions(HttpBuildTimeConfig buildTimeC
             }
         }
         serverOptions.setSsl(true);
+        serverOptions.setSni(sslConfig.sni);
         serverOptions.setHost(httpConfiguration.host);
         serverOptions.setPort(httpConfiguration.determineSslPort(launchMode));
         serverOptions.setClientAuth(buildTimeConfig.tlsClientAuth);
@@ -676,13 +693,30 @@ private static byte[] getFileContent(Path path) throws IOException {
         return data;
     }
 
-    private static void createPemKeyCertOptions(Path certFile, Path keyFile,
+    private static void createPemKeyCertOptions(List<Path> certFile, List<Path> keyFile,
             HttpServerOptions serverOptions) throws IOException {
-        final byte[] cert = getFileContent(certFile);
-        final byte[] key = getFileContent(keyFile);
+
+        if (certFile.size() != keyFile.size()) {
+            throw new ConfigurationException("Invalid certificate configuration - `files` and `keyFiles` must have the "
+                    + "same number of elements");
+        }
+
+        List<Buffer> certificates = new ArrayList<>();
+        List<Buffer> keys = new ArrayList<>();
+
+        for (Path p : certFile) {
+            final byte[] cert = getFileContent(p);
+            certificates.add(Buffer.buffer(cert));
+        }
+
+        for (Path p : keyFile) {
+            final byte[] key = getFileContent(p);
+            keys.add(Buffer.buffer(key));
+        }
+
         PemKeyCertOptions pemKeyCertOptions = new PemKeyCertOptions()
-                .setCertValue(Buffer.buffer(cert))
-                .setKeyValue(Buffer.buffer(key));
+                .setCertValues(certificates)
+                .setKeyValues(keys);
         serverOptions.setPemKeyCertOptions(pemKeyCertOptions);
     }