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https://issues.apache.org/jira/browse/SSHD-759?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16113049#comment-16113049
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Christian Schneider commented on SSHD-759:
------------------------------------------

Thanks. I have now reworked the karaf ssh code to not use 
AbstractGeneratorHostKeyProvider. 

See 
https://github.com/apache/karaf/commit/fd801e07b5d9034dde4a677a56ab58c6a8ae3307
I create the key on startup if none is already present. We need this feature so 
people can start with karaf right away.

I still need a custom class for reading the pem keys as the one in mina sshd 
1.6.0 does not work. Guillaume fixed that in a separate issue. So after the 
next release I will switch the FileKeyProvider.


> Should not overwrite existing ssh key if the algorithm does not match
> ---------------------------------------------------------------------
>
>                 Key: SSHD-759
>                 URL: https://issues.apache.org/jira/browse/SSHD-759
>             Project: MINA SSHD
>          Issue Type: Bug
>    Affects Versions: 1.4.0
>            Reporter: Christian Schneider
>
> Currently a key file that does not have the correct algorithm is simply 
> deleted.
> I think this is not a good behaviour as the user might have created the key 
> explicitly.
> https://github.com/apache/mina-sshd/blob/master/sshd-core/src/main/java/org/apache/sshd/server/keyprovider/AbstractGeneratorHostKeyProvider.java#L238-L244
> I propose we simply throw an exception if the algorithm does not match. Then 
> the user can decide if he wants to delete the file or change the algorithm.



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