mirror of
https://github.com/osmarks/random-stuff
synced 2024-12-29 11:30:35 +00:00
38 lines
1.1 KiB
Lua
38 lines
1.1 KiB
Lua
|
local modem = peripheral.find("modem", function(_, o)
|
||
|
|
return o.maxPacketSize ~= nil
|
||
|
|
end)
|
||
|
|
local sha256 = require "/sha256"
|
||
|
|
local psk = settings.get "psk"
|
||
|
|
|
||
|
|
local function tohex(t)
|
||
|
|
local out = {}
|
||
|
|
for _, val in pairs(t) do
|
||
|
|
table.insert(out, ("%02x"):format(val))
|
||
|
|
end
|
||
|
|
return table.concat(out)
|
||
|
|
end
|
||
|
|
|
||
|
|
modem.open(46111)
|
||
|
|
while true do
|
||
|
|
local input = read()
|
||
|
|
local target = ""
|
||
|
|
local nonce = {}
|
||
|
|
for i = 1, 16 do
|
||
|
|
table.insert(nonce, math.random(0, 255))
|
||
|
|
end
|
||
|
|
nonce = tohex(nonce)
|
||
|
|
modem.transmit(46110, 46110, input, tohex(sha256.digest(input .. psk .. target .. nonce)), target, nonce)
|
||
|
|
local ev = {os.pullEvent "modem_message"}
|
||
|
|
if #ev == 8 then
|
||
|
|
local response, signature, device, nonce = ev[5], ev[6], ev[7], ev[8]
|
||
|
|
if tohex(sha256.digest(response .. psk .. device .. nonce)) == signature then
|
||
|
|
local ok, err = unpack(textutils.unserialise(response))
|
||
|
|
if ok then
|
||
|
|
print(err)
|
||
|
|
else
|
||
|
|
printError(err)
|
||
|
|
end
|
||
|
|
print(device)
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|