opus/sys/network/trust.lua

local Crypto   = require('crypto')
local Event    = require('event')
local Security = require('security')
local Socket   = require('socket')
local Util     = require('util')

Event.addRoutine(function()

  print('trust: listening on port 19')
  while true do
    local socket = Socket.server(19)

    print('trust: connection from ' .. socket.dhost)

    local data = socket:read(2)
    if data then
      local password = Security.getPassword()
      if not password then
        socket:write({ msg = 'No password has been set' })
      else
        data = Crypto.decrypt(data, password)
        if data and data.pk and data.dh == socket.dhost then
          local trustList = Util.readTable('usr/.known_hosts') or { }
          trustList[data.dh] = data.pk
          Util.writeTable('usr/.known_hosts', trustList)

          socket:write({ success = true, msg = 'Trust accepted' })
        else
          socket:write({ msg = 'Invalid password' })
        end
      end
    end
    socket:close()
  end
end)