gansheer commented on code in PR #8629:
URL: https://github.com/apache/camel-quarkus/pull/8629#discussion_r3202131937


##########
integration-tests-support/sftp/src/main/java/org/apache/camel/quarkus/test/support/sftp/SftpHostCertTestResource.java:
##########
@@ -0,0 +1,170 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.camel.quarkus.test.support.sftp;
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.security.KeyPair;
+import java.security.PublicKey;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+import io.quarkus.test.common.QuarkusTestResourceLifecycleManager;
+import org.apache.camel.quarkus.test.AvailablePortFinder;
+import org.apache.sshd.common.NamedFactory;
+import org.apache.sshd.common.config.keys.OpenSshCertificate;
+import org.apache.sshd.common.config.keys.PublicKeyEntry;
+import org.apache.sshd.common.file.virtualfs.VirtualFileSystemFactory;
+import org.apache.sshd.common.keyprovider.FileKeyPairProvider;
+import org.apache.sshd.common.keyprovider.KeyPairProvider;
+import org.apache.sshd.common.signature.BuiltinSignatures;
+import org.apache.sshd.common.signature.Signature;
+import org.apache.sshd.scp.server.ScpCommandFactory;
+import org.apache.sshd.server.SshServer;
+import org.apache.sshd.sftp.server.SftpSubsystemFactory;
+import org.jboss.logging.Logger;
+
+/**
+ * SFTP test resource that presents host certificates for host certificate 
verification testing.
+ * This is separate from SftpTestResource to avoid interfering with other 
tests.
+ */
+public class SftpHostCertTestResource implements 
QuarkusTestResourceLifecycleManager {
+    private static final Logger LOGGER = 
Logger.getLogger(SftpHostCertTestResource.class);
+
+    private SshServer sshServer;
+    private Path sftpHome;
+
+    @Override
+    public Map<String, String> start() {
+        try {
+            final int port = AvailablePortFinder.getNextAvailable();
+
+            sftpHome = Files.createTempDirectory("sftp-hostcert-");
+            Path adminHome = sftpHome.resolve("admin");
+            Files.createDirectories(adminHome);
+
+            VirtualFileSystemFactory factory = new VirtualFileSystemFactory();
+            factory.setUserHomeDir("admin", adminHome.toAbsolutePath());
+
+            sshServer = SshServer.setUpDefaultServer();
+            sshServer.setPort(port);
+
+            sshServer.setKeyPairProvider(createHostCertKeyPairProvider());
+
+            sshServer.setSubsystemFactories(Collections.singletonList(new 
SftpSubsystemFactory()));
+            sshServer.setCommandFactory(new ScpCommandFactory());
+            sshServer.setPasswordAuthenticator((username, password, session) 
-> true);
+            sshServer.setPublickeyAuthenticator((username, key, session) -> 
true);
+
+            // Add certificate signature factories
+            List<NamedFactory<Signature>> signatureFactories = 
sshServer.getSignatureFactories();
+            signatureFactories.add(BuiltinSignatures.rsa_cert);
+            signatureFactories.add(BuiltinSignatures.rsaSHA256_cert);
+            signatureFactories.add(BuiltinSignatures.rsaSHA512_cert);
+            signatureFactories.add(BuiltinSignatures.ed25519_cert);
+            sshServer.setSignatureFactories(signatureFactories);
+
+            sshServer.setFileSystemFactory(factory);
+            sshServer.start();
+
+            LOGGER.infof("SFTP server with host certificate started on port 
%d", port);
+
+            return Collections.singletonMap("camel.sftp.hostcert.test-port", 
Integer.toString(port));
+        } catch (Exception e) {
+            throw new RuntimeException("Failed to start SFTP server with host 
certificate", e);
+        }
+    }
+
+    @Override
+    public void stop() {
+        try {
+            if (sshServer != null) {
+                sshServer.stop();
+                LOGGER.info("SFTP server with host certificate stopped");
+            }
+        } catch (Exception e) {
+            LOGGER.warn("Failed to stop SFTP server", e);
+        }
+
+        try {
+            if (sftpHome != null && Files.exists(sftpHome)) {
+                Files.walk(sftpHome)
+                        .sorted((a, b) -> -a.compareTo(b))

Review Comment:
   This is a not that pretty way to ensure that we don't try to delete a 
non-empty directory first. Files.walk() traverses depth-first but returns paths 
in an order where parent directories may come before their contents so 
reversing the order avoid this issue.



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