ssh/knownhosts: implements DB interface

There is an issue with current SSH client implementation.
Given a single host public key in the known_hosts file,

   host ssh-ed25519 key...

Calling ssh.Dial(`tcp`, "host", ...) will return an error

   knownhosts: key mismatch

from [handshakeTransport.enterKeyExchange], because only key
"mlkem768x25519-sha256" is checked on the client side.

This changes add DB interface for knownhosts that have two methods:

- HostKeyAlgorithms: return the host key that matches in known_hosts
  based on the "host" name or address for
  [ssh.ClientConfig.HostKeyAlgorithms].

- HostKeyCallback: return the ssh.HostKeyCallback for
  [ssh.ClientConfig.HostKeyCallback].

Author: Faye Salwin
Reference: https://go-review.googlesource.com/c/crypto/+/154458

0 files changed, 0 insertions, 0 deletions