client/luascripts/ntag_getsig.lua

   1 local getopt = require('getopt')
   2 local lib14a = require('read14a')
   3 local cmds = require('commands')
   4 local ansicolors = require('ansicolors')
   5
   6 copyright = 'Copyright 2021 A. Ozkal, released under GPLv2+.'
   7 author = 'Ave'
   8 version = 'v1.0.0'
   9 desc = [[
  10 This script attempts to grab signatures from an NTAG or MFULEV1 card and print it in a machine parsable way
  11  ]]
  12 example = [[
  13     script run ntag_getsig
  14 ]]
  15 usage = [[
  16     script run ntag_getsig [-h]
  17 ]]
  18 arguments = [[
  19     -h                   : This help
  20 ]]
  21
  22 local function help()
  23     print(author)
  24     print(version)
  25     print(desc)
  26     print(ansicolors.cyan..'Usage'..ansicolors.reset)
  27     print(usage)
  28     print(ansicolors.cyan..'Arguments'..ansicolors.reset)
  29     print(arguments)
  30     print(ansicolors.cyan..'Example usage'..ansicolors.reset)
  31     print(example)
  32 end
  33
  34 -- Used to send raw data to the firmware to subsequently forward the data to the card.
  35 -- from mifareplus.lua
  36 local function sendRaw(rawdata, crc, power)
  37     -- print(("<sent>:       %s"):format(rawdata))
  38
  39     local flags = lib14a.ISO14A_COMMAND.ISO14A_RAW
  40     if crc then
  41         flags = flags + lib14a.ISO14A_COMMAND.ISO14A_APPEND_CRC
  42     end
  43     if power then
  44         flags = flags + lib14a.ISO14A_COMMAND.ISO14A_NO_DISCONNECT
  45     end
  46
  47     local command = Command:newMIX{cmd = cmds.CMD_HF_ISO14443A_READER,
  48                                 arg1 = flags, -- Send raw
  49                                 arg2 = string.len(rawdata) / 2, -- arg2 contains the length, which is half the length of the ASCII-string rawdata
  50                                 data = rawdata
  51                                 }
  52     local ignore_response = false
  53     local result, err = command:sendMIX(ignore_response)
  54     if result then
  55         --unpack the first 4 parts of the result as longs, and the last as an extremely long string to later be cut down based on arg1, the number of bytes returned
  56         local count,cmd,arg1,arg2,arg3,data = bin.unpack('LLLLH512',result)
  57
  58         returned_bytes = string.sub(data, 1, arg1 * 2)
  59         if #returned_bytes > 0 then
  60             -- print(("<recvd>: %s"):format(returned_bytes)) -- need to multiply by 2 because the hex digits are actually two bytes when they are strings
  61             return returned_bytes
  62         else
  63             return nil
  64         end
  65     else
  66         print("Error sending the card raw data.")
  67         return nil
  68     end
  69 end
  70
  71 ---
  72 -- The main entry point
  73 function main(args)
  74     -- Read the parameters
  75     for o, a in getopt.getopt(args, 'h') do
  76         if o == 'h' then return help() end
  77     end
  78
  79     local tag, err = lib14a.read(true, false)
  80
  81     if not err then
  82         local sig = sendRaw("3C00", true, true)
  83         local ver = sendRaw("60", true, false)
  84         if sig and ver then  -- if false, that's a fail right there
  85             sig = string.sub(sig, 0, -5)
  86             ver = string.sub(ver, 0, -5)
  87             local text = tag.name..","..ver..","..tag.uid..","..sig
  88             print(text)
  89
  90             local filename = "originalitysig.csv"
  91             local outfile = io.open(filename, "a")
  92             if outfile ~= nil then
  93                 outfile:write(text.."\n")
  94                 io.close(outfile)
  95             else
  96                 print(ansicolors.red.."Couldn't open file originalitysig.csv."..ansicolors.reset)
  97             end
  98         else
  99             print(ansicolors.red.."Read FAILED."..ansicolors.reset)
 100         end
 101     end
 102 end
 103
 104 main(args)