@SuppressWarnings("unchecked")
protected boolean startSshd() {
sshd = SshServer.setUpDefaultServer();
sshd.setPort(getPort());
sshd.setKeyPairProvider(new FileKeyPairProvider(new String[]{"src/test/resources/hostkey.pem"}));
sshd.setSubsystemFactories(Arrays.<NamedFactory<Command>>asList(new SftpSubsystem.Factory()));
sshd.setCommandFactory(new ScpCommandFactory());
sshd.setPasswordAuthenticator(new PasswordAuthenticator() {
@Override
public boolean authenticate(String username, String password, ServerSession session) {