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From "Lukasz Lech (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KARAF-5072) Add setting to ssh server for forcing a provided key
Date Fri, 31 Mar 2017 08:19:41 GMT

    [ https://issues.apache.org/jira/browse/KARAF-5072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15950512#comment-15950512
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Lukasz Lech commented on KARAF-5072:
------------------------------------

If the key is present but invalid it will be overwritten by default => There is a problem
with current implementation which works that way. If the process of writing the generated
key fails (and according to my analize, it will fail each time for PEM format => KARAF-5073),
then the result will be the server generating new key on each start - hopefully not insecure
'throwaway' key as in current implementation).

My suggestion:

1) If generating key is off -> must have a valid key to start SSH Shell
2) If generating is on and host.key is not present -> generate new one, but MUST validate
afterwards by trying to parse the written file
3) If key is invalid -> fail to start with precise error message in log

> Add setting to ssh server for forcing a provided key
> ----------------------------------------------------
>
>                 Key: KARAF-5072
>                 URL: https://issues.apache.org/jira/browse/KARAF-5072
>             Project: Karaf
>          Issue Type: Improvement
>          Components: karaf-shell
>    Affects Versions: 4.1.1
>            Reporter: Christian Schneider
>            Assignee: Christian Schneider
>             Fix For: 4.1.2
>
>
> If karaf does not find a server key in etc/hosts.key it will create one and save it.

> If the key is present but invalid it will be overwritten by default.
> If overwrite=false in the settings and the provided key is invalid then karaf will create
a key on every first ssh connect after a restart. 
> I think it would be better to have a setting to force the provided key to be used and
throw an exception if it is invalid.



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