[SSHD-1040] get the server key

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.2.0, 2.3.0, 2.5.0, 2.4.0, 2.5.1
• Fix Version/s: 2.6.0
• Assignee: Lyor Goldstein
• Reporter: clem
• Created: 21/Jul/20 10:00
• Updated: 22/Jul/20 08:52
• Resolved: 22/Jul/20 08:52

Description

Hello,

There's a bug for get the public key of a server from version 2.2.0.

On the version 2.1.0, it works :

Code :

SshClient client = SshClient.setUpDefaultClient();
client.start();

ConnectFuture connectFuture = client.connect("xxx", "xxx", 22);
connectFuture.await(10000);

ClientSession session = connectFuture.getSession();
session.waitFor(Arrays.asList(ClientSessionEvent.WAIT_AUTH), 10000); 

System.out.println(session.getKex().getServerKey().toString());

Result :

Sun RSA public key, 2048 bits
 modulus: xxx
 public exponent: 35

 

And with a higher version (example 2.5.1), the result is : 

Exception in thread "main" java.lang.NullPointerException
   at test.test.main(test.java:27)

Line 27 is :

System.out.println(session.getKex().getServerKey().toString());