96 lines
3.0 KiB
Lua
96 lines
3.0 KiB
Lua
tg_server_name = "tg_server"
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local args = {...}
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local function split(str, divider)
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local t = {}
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for part in string.gmatch(str, "([^" .. divider .. "]+)") do
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table.insert(t, part)
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end
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return t
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end
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local function establish_connection()
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local peripherals = peripheral.getNames()
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for _, side in ipairs(peripherals) do
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if peripheral.getType(side) == "modem" then
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rednet.open(side)
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return true
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end
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end
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return false
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end
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function validate_clearance(computer_id, clearance_level)
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if establish_connection() then
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tg_server_id = rednet.lookup('tg', tg_server_name)
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rednet.send(tg_server_id, "validate_clearance,"..computer_id..","..clearance_level,"tg")
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local id, msg, proto = rednet.receive("tg")
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if msg == "granted" then
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return true
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else
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return false, "authentication failed"
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end
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else
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return false, "modem not found"
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end
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end
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function validate_key(minimum_clearance)
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if establish_connection() then
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if fs.exists("/disk/key") then
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local key_file = fs.open("/disk/key","r")
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local key = key_file.readLine()
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tg_server_id = rednet.lookup('tg', tg_server_name)
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rednet.send(tg_server_id, "validate_key,"..key..","..minimum_clearance, "tg")
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local id, msg, _ = rednet.receive("tg")
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if msg == "authentication successful" then
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return true
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else
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return false, "authentication error: "..msg
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end
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else
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return false, "key file not found"
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end
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else
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return false, "modem not found"
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end
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end
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function authenticate()
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if fs.exists('/disk/key') then
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local key_file = fs.open('/disk/key', 'r')
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local key = key_file.readLine()
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if establish_connection() then
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tg_server_id = rednet.lookup("tg", tg_server_name)
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rednet.send(tg_server_id, "authenticate,"..key,"tg")
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local id, msg, proto = rednet.receive("tg")
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if msg == "authentication successful" then
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local key_parts = split(key,',')
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local card_holder = key_parts[1]
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local card_clearance = key_parts[2]
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return true, _, card_holder, card_clearance
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else
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print("Authentication failed.")
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return false, "authentication failed"
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end
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else
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return false, "modem not found"
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end
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key_file.close()
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else
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print("Key file not found. Aborting.")
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return false, "key file not found"
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end
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end
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if args[1] == "auth" or args[1] == "authenticate" then
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local success, error, card_holder, card_clearance = authenticate()
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if success then
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print("Authentication was successful.")
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print("Hello "..card_holder..", you were granted clearance level "..card_clearance.." for this computer.")
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else
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print("Authentication failed: "..error)
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end
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end |