ssh - Apache MINA SSHD - 连接到服务器时的身份验证方法问题

Question

我正在尝试关注 Apache MINA 的 guide用于设置 SSHD 服务器，但在使用 PuTTY 连接到它时遇到问题。我开始输入用户名，但随后收到以下错误消息:

下面是我的服务器的代码。我是否必须为服务器手动设置身份验证方法？还是我做错了什么？

sshd = SshServer.setUpDefaultServer();
sshd.setPort(3333);

List<NamedFactory<UserAuth>> userAuthFactories = new ArrayList<NamedFactory<UserAuth>>();
sshd.setUserAuthFactories(userAuthFactories);

sshd.setKeyPairProvider(new SimpleGeneratorHostKeyProvider("hostkey.ser"));

sshd.start();

Answer 1

我刚刚创建了一个适合我的示例。我使用 Putty 连接到 Apache SSHD。我使用的 Lib 版本是“apache-sshd-0.9.0”(下载时间:2014-02-04)。 JDK 1.7。

我的示例的主要内容如下:

public static void main(String[] args) throws IOException
{
  SshServer sshd = SshServer.setUpDefaultServer();
  sshd.setPort(22);
  sshd.setKeyPairProvider(new SimpleGeneratorHostKeyProvider("./keys/mysample", 
            SimpleGeneratorHostKeyProvider.SSH_RSA));

  List<NamedFactory<UserAuth>> userAuthFactories = new ArrayList<NamedFactory<UserAuth>>();
  userAuthFactories.add(new UserAuthPassword.Factory());
  sshd.setUserAuthFactories(userAuthFactories);

  sshd.setPasswordAuthenticator(new PasswordAuthenticator() {
  public boolean authenticate(String username, String password, ServerSession session) {
    return "tomek".equals(username) && "123".equals(password);
    }
  });

  sshd.setShellFactory(new MyCommandFactory());

  sshd.start();
  while (true) ;
}

如您所见，我创建了自己的命令工厂，如下所示:(顺便说一句。this question on SO 对我很有帮助)

public class MyCommandFactory  implements CommandFactory, Factory<Command>
{
  public Command createCommand(String s)
  {
    System.out.println("command requested: " + s);
    return new MyCommand(s);
  }

  public Command create()
  {
    return createCommand("none");
  }
}

为了测试目的创建一个这样的命令:

public class MyCommand implements Command
{

  private String name;

  private InputStream inputStream;
  private OutputStream outputStream;
  private ExitCallback exitCallback;

  public MyCommand(String name)
  {
    this.name = name;
  }

  public void setInputStream(final InputStream inputStream)
  {
    System.out.println("input stream was set on command: " + name);
    this.inputStream = inputStream;
  }

  public void setOutputStream(final OutputStream outputStream)
  {
    System.out.println("output stream was set on command: " + name);
    this.outputStream = outputStream;
  }

  public void setErrorStream(OutputStream outputStream)
  {
    System.out.println("error stream was set on command: " + name);
  }

  public void setExitCallback(ExitCallback exitCallback)
  {
    System.out.println("exit callback was set on command: " + name);
    this.exitCallback = exitCallback;
  }

  public void start(Environment environment) throws IOException
  {
    try
    {

      final PrintWriter writer = new PrintWriter(outputStream, true);
      writer.println("Welcome to Java SSH echo server!");
      writer.flush();

      // ... here you gonna read input from remote client ...
      // use writer to write back responses
    }
    catch (final Exception e)
    {
      e.printStackTrace();
    }
  }

  public void destroy()
  {
    System.out.println("destroy was called on command: " + name);
    // client or server closed connection, clean up resources here
  }
}

如您所见，我使用了 key 文件“./keys/mysample”。要创建这样一个 key 文件试试这个:(顺便说一句。this question on SO 对此很有帮助)

keytool -genkey -keystore ./keys/mysample" -keyalg RSA

瞧:

我希望这对某人有帮助。

[编辑] 在这里查看一个更好的回显服务器: http://svn.apache.org/repos/asf/mina/sshd/trunk/sshd-core/src/test/java/org/apache/sshd/util/EchoShellFactory.java