Can we disable diffie-hellman-group14-sha1 by default?

[Darren Tucker]

On Sun, 20 Jan 2019 at 12:21, Yegor Ievlev <koops1997 at gmail.com> wrote:
> Also, are DH groups sent by server signed in addition to server's
> supported algorithms?

Yes.  From RFC4419 section 3:

"""
   The server responds with:

     byte    SSH_MSG_KEX_DH_GEX_REPLY
     string  server public host key and certificates (K_S)
     mpint   f
     string  signature of H

   The hash H is computed as the HASH hash of the concatenation of the
   following:
[...]
     string  I_S, the payload of the server's SSH_MSG_KEXINIT
[...]
     mpint   p, safe prime
     mpint   g, generator for subgroup
"""

-- 
Darren Tucker (dtucker at dtucker.net)
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