class Net::SSH::Config

def translate(settings)
  auth_methods = default_auth_methods.clone
  (auth_methods << 'challenge-response').uniq!
  ret = settings.inject({:auth_methods=>auth_methods}) do |hash, (key, value)|
    case key
    when 'bindaddress' then
      hash[:bind_address] = value
    when 'ciphers' then
      hash[:encryption] = value.split(/,/)
    when 'compression' then
      hash[:compression] = value
    when 'compressionlevel' then
      hash[:compression_level] = value
    when 'connecttimeout' then
      hash[:timeout] = value
    when 'forwardagent' then
      hash[:forward_agent] = value
    when 'identitiesonly' then
      hash[:keys_only] = value
    when 'globalknownhostsfile'
      hash[:global_known_hosts_file] = value
    when 'hostbasedauthentication' then
      if value
        (hash[:auth_methods] << "hostbased").uniq!
      else
        hash[:auth_methods].delete("hostbased")
      end
    when 'hostkeyalgorithms' then
      hash[:host_key] = value.split(/,/)
    when 'hostkeyalias' then
      hash[:host_key_alias] = value
    when 'hostname' then
      hash[:host_name] = value.gsub(/%h/, settings['host'])
    when 'identityfile' then
      hash[:keys] = value
    when 'macs' then
      hash[:hmac] = value.split(/,/)
    when 'serveralivecountmax'
      hash[:keepalive_maxcount] = value.to_i if value
    when 'serveraliveinterval'
      if value && value.to_i > 0
        hash[:keepalive] = true
        hash[:keepalive_interval] = value.to_i
      else
        hash[:keepalive] = false
      end
    when 'passwordauthentication'
      if value
        (hash[:auth_methods] << 'password').uniq!
      else
        hash[:auth_methods].delete('password')
      end
    when 'challengeresponseauthentication'
      if value
        (hash[:auth_methods] << 'challenge-response').uniq!
      else
        hash[:auth_methods].delete('challenge-response')
      end
    when 'kbdinteractiveauthentication'
      if value
        (hash[:auth_methods] << 'keyboard-interactive').uniq!
      else
        hash[:auth_methods].delete('keyboard-interactive')
      end
    when 'port'
      hash[:port] = value
    when 'preferredauthentications'
      hash[:auth_methods] = value.split(/,/) # TODO we should place to preferred_auth_methods rather than auth_methods
    when 'proxycommand'
      if value and !(value =~ /^none$/)
        require 'net/ssh/proxy/command'
        hash[:proxy] = Net::SSH::Proxy::Command.new(value)
      end
   when 'pubkeyauthentication'
      if value
        (hash[:auth_methods] << 'publickey').uniq!
      else
        hash[:auth_methods].delete('publickey')
      end
    when 'rekeylimit'
      hash[:rekey_limit] = interpret_size(value)
    when 'user'
      hash[:user] = value
    when 'userknownhostsfile'
      hash[:user_known_hosts_file] = value
    when 'sendenv'
      multi_send_env = value.to_s.split(/\s+/)
      hash[:send_env] = multi_send_env.map { |e| Regexp.new pattern2regex(e).source, false }
    when 'numberofpasswordprompts'
      hash[:number_of_password_prompts] = value.to_i
    end
    hash
  end
  merge_challenge_response_with_keyboard_interactive(ret)
end