hudson.plugins.ec2.ssh.verifiers

Class HostKeyHelper

java.lang.Object

hudson.plugins.ec2.ssh.verifiers.HostKeyHelper

public final class HostKeyHelper
extends Object

Helper methods to allow loading and saving of host keys for a computer. Verifiers don't have a reference to the Node or Computer that they're running for at the point they're created, so can only load the existing key to run comparisons against at the point the verifier is invoked during the connection attempt.

Since:

TODO

Author:

Michael Clarke, M Ramon Leon

Method Summary

Modifier and Type	Method and Description
HostKey	getHostKey(Computer host) Retrieve the currently trusted host key for the requested computer, or null if no key is currently trusted.
static HostKeyHelper	getInstance()
void	saveHostKey(Computer host, HostKey hostKey) Persists an SSH key to disk for the requested host.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getInstance

public static HostKeyHelper getInstance()

getHostKey

public HostKey getHostKey(Computer host)
                   throws IOException

Retrieve the currently trusted host key for the requested computer, or null if no key is currently trusted.

Parameters:

host - the Computer to retrieve the key for.

Returns:

the currently trusted key for the requested host, or null if no key is trusted.

Throws:

IOException - if the host key can not be read from storage

saveHostKey

public void saveHostKey(Computer host,
                        HostKey hostKey)
                 throws IOException

Persists an SSH key to disk for the requested host. This effectively marks the requested key as trusted for all future connections to the host, until any future save attempt replaces this key.

Parameters:

host - the host the key is being saved for

hostKey - the key to be saved as the trusted key for this host

Throws:

IOException - on failure saving the key for the host