[SOLVED] com.jcraft.jsch.JSchException: UnknownHostKey

com.jcraft.jsch.JSchException: UnknownHostKey

I'm trying to use Jsch to establish an SSH connection in Java. My code produces the following exception:

com.jcraft.jsch.JSchException: UnknownHostKey: mywebsite.example.
RSA key fingerprint is 22:fb:ee:fe:18:cd:aa:9a:9c:78:89:9f:b4:78:75:b4

I cannot find how to verify the host key in the Jsch documentation. I have included my code below.

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

public class ssh {
    public static void main(String[] arg) {

        try {
            JSch jsch = new JSch();

            //create SSH connection
            String host = "mywebsite.example";
            String user = "username";
            String password = "123456";

            Session session = jsch.getSession(user, host, 22);
            session.setPassword(password);
            session.connect();

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

Solution

I would either:

Try to ssh from the command line and accept the public key (the host will be added to ~/.ssh/known_hosts and everything should then work fine from Jsch) -OR-
Configure JSch to not use "StrictHostKeyChecking" (this introduces insecurities and should only be used for testing purposes), using the following code:
```
java.util.Properties config = new java.util.Properties(); 
config.put("StrictHostKeyChecking", "no");
session.setConfig(config);
```

Option #1 (adding the host to the ~/.ssh/known_hosts file) has my preference.