JSchException:UnknownHostKey

Question

我正在尝试使用Jsch在Java中建立SSH连接.我已将"StrictHostKeyChecking"设置为yes.据我所知,必须事先获取服务器的主机密钥,并在第一次尝试连接服务器之前存储在hostkey文件中.如何获取服务器的HostKey.我的代码产生以下异常:

com.jcraft.jsch.JSchException:UnknownHostKey:ASY-PC RSA密钥指纹是22:fb:ee:fe:18:cd:aa:9a:9c:78:89:9f:b4:78:75:b4

如何与StrictHostKeyChecking建立连接是的.这是我的代码.

package sshexample;

import com.jcraft.jsch.*;
import java.io.*;

public class SSHexample 
{
public static void main(String[] args) 
{
    String user = "user";
    String password = "password";
    String host = "192.168.100.103";
    int port=22;
    try
    {
        JSch jsch = new JSch();
        Session session = jsch.getSession(user, host, port);
        session.setPassword(password);
        session.setConfig("StrictHostKeyChecking", "yes");
        System.out.println("Establishing Connection...");
        session.connect();
        System.out.println("Connection established.");
        System.out.println("Crating SFTP Channel.");
        ChannelSftp sftpChannel = (ChannelSftp) session.openChannel("sftp");
        sftpChannel.connect();
}catch(Exception e) {
e.printStackTrace();
}
}

Answer 1

您必须通过调用以下函数来提供KnownHostKeys文件

jsch.setKnownHosts(new FileInputStream(knownHostsFile));

此文件应该将所有已知主机的指纹分隔为新行.

例如

hostname,10.1.1.120, ssh-rsa AAAAC3NzaC1yc2EAAAADAQABAAABAQCi5b647581SwC0uUDQw1ENjKSz3rhJMRRZEgIjHylvF4fbuAEzj645YoAf9SItb51MhetFAJrq98jYsHpedSm3IoMG+aR/P1CjsBz1RtJKlfR2NfYDCZ7Dyx11P8FnJbwbYif/GeG0xEujekwF1pyL0tNPmf0H4/GPR4mwrv/llGlB3Lo3BzxrGtl4f4X/oSHDoo7FrQkDwqOfeSM++3vPPHxyVO5zhFJ5u9f7M/uuxUeHS+YS5JWAI7NLXKgbiM9dluGzZU/6Awo3ux4x5ojL+kf29JEVxK+o6GfW2bIW+LhgIGZNThnN5nHzBVfNNHvQ7KC5ic0h2z2gbVpwJr1h

您可以使用任何sftp客户端从服务器获取此密钥,但是如果您使用的是linux或unix,则以下命令可能会有所帮助

ssh-keyscan -t rsa 10.1.1.120