我们可以使用JSch进行基于SSH密钥的通信吗？ [英] Can we use JSch for SSH key-based communication?

问题描述

我正在使用 JSch 进行sftp通信，现在我想使用便于基于密钥的身份验证，密钥由我的网络团队一次加载到客户端和服务器上，所有后来的通信都只是基于用户的，我们已经加载了密钥。

I am using JSch for sftp communication, now i want to use facilitate the key-based authentication, key is loaded on client and server machine once by my network team and all later communication would be only user based for which we have loaded the key.

sftp -oPort=10022 jmark@192.18.0.246

as tjill@192.18.0.135

像这个命令工作正常并连接到sftp，我如何以编程方式实现此功能。

like this command work fine and connect to the sftp, how i can achieve this functionality programmatically.

如果使用JSch是不可能的，请建议其他一些库。我遇到了 Apache SSHD 。

if it is not possible using JSch, please suggest some other library. I came across Apache SSHD.

推荐答案

有可能。看看 JSch.addIdentity（...）

It is possible. Have a look at JSch.addIdentity(...)

这允许您使用键作为字节数组或从中读取它文件。

This allows you to use key either as byte array or to read it from file.

import com.jcraft.jsch.Channel;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;

public class UserAuthPubKey {
    public static void main(String[] arg) {
        try {
            JSch jsch = new JSch();

            String user = "tjill";
            String host = "192.18.0.246";
            int port = 10022;
            String privateKey = ".ssh/id_rsa";

            jsch.addIdentity(privateKey);
            System.out.println("identity added ");

            Session session = jsch.getSession(user, host, port);
            System.out.println("session created.");

            // disabling StrictHostKeyChecking may help to make connection but makes it insecure
            // see http://stackoverflow.com/questions/30178936/jsch-sftp-security-with-session-setconfigstricthostkeychecking-no
            // 
            // java.util.Properties config = new java.util.Properties();
            // config.put("StrictHostKeyChecking", "no");
            // session.setConfig(config);

            session.connect();
            System.out.println("session connected.....");

            Channel channel = session.openChannel("sftp");
            channel.setInputStream(System.in);
            channel.setOutputStream(System.out);
            channel.connect();
            System.out.println("shell channel connected....");

            ChannelSftp c = (ChannelSftp) channel;

            String fileName = "test.txt";
            c.put(fileName, "./in/");
            c.exit();
            System.out.println("done");

        } catch (Exception e) {
            System.err.println(e);
        }
    }
}

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