Re: Specify Host Key

[Oliver Gasser <gasser@xxxxxxxxx>]

Hi,

thanks for the information, Aris.
I checked out the git master and created a simple patch against it to make
it possible via ssh_options_set(). I tested it and it works. Could this
feature be included upstream in libssh?
The patch is attached.

Regards,
Oliver

On Sat, Jun 23, 2012 at 3:13 PM, Aris Adamantiadis <aris@xxxxxxxxxxxx>wrote:

> Hello,
>
> It was possible to do so in runtime with the old interface
> priv.h:int ssh_options_set_algo(ssh_session session, int algo, const
> char *list);
>
> However this function call is unfortunately private. If you include
> priv.h, you will be able to user
> ssh_options_set_algo(session, SSH_HOSTKEYS, "ssh-dss");
> ssh_options_set_algo(session, SSH_KEX,"diffie-hellman-group1-sha1");
>
> However we can't guarantee that this will work in future versions of
> libssh. If you wish to make it a feature of libssh, it is quite simple
> to add this case to the ssh_options_set() function.
>
> Kr,
>
> Aris
>
> Le 21/06/12 14:20, Oliver Gasser a écrit :
> > Hello,
> >
> > is it possible to specify the host key preference when connecting to a
> > server?
> >
> > In kex.c there is
> >
> > #ifdef HAVE_ECDH
> > #define KEY_EXCHANGE "ecdh-sha2-nistp256,diffie-hellman-group1-sha1"
> > #define HOSTKEYS "ecdsa-sha2-nistp256,ssh-rsa,ssh-dss"
> > #else
> > #define KEY_EXCHANGE "diffie-hellman-group1-sha1"
> > #define HOSTKEYS "ssh-rsa,ssh-dss"
> > #endif
> >
> > so they seem to be predefined. Is that correct? And if yes, is it
> > possible to circumvent this and specify your own host-key preference
> > dynamically?
> >
> > Regards,
> > Oliver Gasser
> >
>
>
>

Attachment: fix_host_keys_string.patch
Description: Binary data