git.zerfleddert.de Git - proxmark3-svn/blob - client/scripts/ufodump.lua

   1 local cmds = require('commands')
   2 local getopt = require('getopt')
   3 local lib14a = require('read14a')
   4 local utils = require('utils')
   5 example = [[
   6         script run ufodump
   7         script run ufodump -b 10
   8 ]]
   9 author = "Iceman"
  10 desc =
  11 [[
  12 This is a script that reads AZTEK iso14443a tags.
  13 It starts from block 0,  and ends at default block 20.  Use 'b' to say different endblock.
  14
  15 xor:  the first three block (0,1,2) is not XORED.  The rest seems to be xored.
  16
  17 Arguments:
  18       h   this helptext
  19       b   endblock in decimal (1-255,  default 20)
  20 ]]
  21
  22 -- Some globals
  23 local TIMEOUT = 2000 -- Shouldn't take longer than 2 seconds
  24 local DEBUG = false -- the debug flag
  25 ---
  26 -- A debug printout-function
  27 function dbg(args)
  28         if DEBUG then
  29                 print("###", args)
  30         end
  31 end
  32 ---
  33 -- This is only meant to be used when errors occur
  34 function oops(err)
  35         print("ERROR: ",err)
  36         core.clearCommandBuffer()
  37 end
  38 ---
  39 -- Usage help
  40 function help()
  41         print(desc)
  42         print("Example usage")
  43         print(example)
  44 end
  45 --
  46 -- writes data to ascii textfile.
  47 function writeDumpFile(uid, blockData)
  48                 local destination = string.format("%s.eml", uid)
  49                 local file = io.open(destination, "w")
  50                 if file == nil then
  51                         return nil, string.format("Could not write to file %s", destination)
  52                 end
  53                 local rowlen = string.len(blockData[1])
  54
  55                 for i,block in ipairs(blockData) do
  56                         if rowlen ~= string.len(block) then
  57                                 print(string.format("WARNING: Dumpdata seems corrupted, line %d was not the same length as line 1",i))
  58                         end
  59                         file:write(block.."\n")
  60                 end
  61                 file:close()
  62                 return destination
  63 end
  64 --
  65 --- Picks out and displays the data read from a tag
  66 -- Specifically, takes a usb packet, converts to a Command
  67 -- (as in commands.lua), takes the data-array and
  68 -- reads the number of bytes specified in arg1 (arg0 in c-struct)
  69 -- and displays the data
  70 -- @blockno just to print which block the data belong to
  71 -- @param usbpacket the data received from the device
  72 function showdata(blockno, data)
  73         local xorkey = '55AA55AA55AA55AA6262'
  74         --local s = data.." | "..utils.ConvertHexToAscii(data).." | "
  75         local s = data.." | "
  76         local dex = ''
  77         local rs
  78         for i = 1, 20-4, 4 do
  79                 local item = string.sub(data, i, i+3)
  80                 local xor = string.sub(xorkey, i, i+3)
  81
  82                 if blockno > 2 then
  83                         rs = bit32.bxor(tonumber(item,16) , tonumber(xor,16))
  84                 else
  85                         rs = tonumber(item, 16)
  86                 end
  87                 dex = (dex..'%04X'):format(rs)
  88         end
  89         --s = s..dex.." | "..utils.ConvertHexToAscii(dex)
  90         s = s..dex.." | "
  91         print( (" %02d | %s"):format(blockno,s))
  92 end
  93 --
  94 -- Send a "raw" iso14443a package, ie "hf 14a raw" command
  95 function sendRaw(rawdata, options)
  96         --print(">> ", rawdata)
  97         local flags = lib14a.ISO14A_COMMAND.ISO14A_NO_DISCONNECT + lib14a.ISO14A_COMMAND.ISO14A_RAW + lib14a.ISO14A_COMMAND.ISO14A_APPEND_CRC
  98         local command = Command:new{cmd = cmds.CMD_READER_ISO_14443a,
  99                                                                         arg1 = flags, -- Send raw
 100                                                                         -- arg2 contains the length, which is half the length
 101                                                                         -- of the ASCII-string rawdata
 102                                                                         arg2 = string.len(rawdata)/2,
 103                                                                         data = rawdata}
 104         return lib14a.sendToDevice(command, options.ignore_response)
 105 end
 106 --
 107 -- Sends an instruction to do nothing, only disconnect
 108 function disconnect()
 109         local command = Command:new{cmd = cmds.CMD_READER_ISO_14443a, arg1 = 0, }
 110         -- We can ignore the response here, no ACK is returned for this command
 111         -- Check /armsrc/iso14443a.c, ReaderIso14443a() for details
 112         return lib14a.sendToDevice(command, true)
 113         --core.console("hf 14a raw -r")
 114 end
 115 ---
 116 -- The main entry point
 117 function main(args)
 118
 119         local ignore_response = false
 120         local endblock = 20
 121
 122         -- Read the parameters
 123         for o, a in getopt.getopt(args, 'hb:') do
 124                 if o == "h" then return help() end
 125                 if o == "b" then endblock = a end
 126         end
 127         endblock = endblock or 20
 128
 129         -- First of all, connect
 130         info, err = lib14a.read1443a(true)
 131         if err then disconnect() return oops(err) end
 132         core.clearCommandBuffer()
 133
 134         local blockData = {}
 135
 136         -- Show tag info
 137         print(("\nFound Card UID [%s]\n"):format(info.uid))
 138
 139         print("blk | data             | xored")
 140         print("----+------------------+-------------------")
 141         for block = 00, endblock do
 142                 local cmd = string.format("10%02x00", block)
 143                 res, err = sendRaw(cmd , {ignore_response = ignore_response})
 144                 if err then disconnect() return oops(err) end
 145
 146                 local cmd_response = Command.parse(res)
 147                 local len = tonumber(cmd_response.arg1) * 2
 148                 local data = string.sub(tostring(cmd_response.data), 0, len-4)
 149
 150                 showdata(block, data)
 151                 table.insert(blockData, data)
 152         end
 153         print("----+------------------+-------------------")
 154         disconnect()
 155
 156         local filename, err = writeDumpFile(info.uid, blockData)
 157         if err then return oops(err) end
 158
 159         print(string.format("\nDumped data into %s", filename))
 160 end
 161
 162
 163
 164
 165 -------------------------
 166 --      Testing
 167 -------------------------
 168 function selftest()
 169         DEBUG = true
 170         dbg("Performing test")
 171         main()
 172         dbg("Tests done")
 173 end
 174 -- Flip the switch here to perform a sanity check.
 175 -- It read a nonce in two different ways, as specified in the usage-section
 176 if "--test"==args then
 177         selftest()
 178 else
 179         -- Call the main
 180         main(args)
 181 end