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.." | "
  75         local dex = ''
  76         local rs
  77         for i = 1, 20-4, 4 do
  78                 local item = string.sub(data, i, i+3)
  79                 local xor = string.sub(xorkey, i, i+3)
  80
  81                 if blockno > 2 then
  82                         rs = bit32.bxor(tonumber(item,16) , tonumber(xor,16))
  83                 else
  84                         rs = tonumber(item, 16)
  85                 end
  86                 dex = (dex..'%04X'):format(rs)
  87         end
  88         s = s..dex.." | "
  89         print( (" %02d | %s"):format(blockno,s))
  90 end
  91 --
  92 -- Send a "raw" iso14443a package, ie "hf 14a raw" command
  93 function sendRaw(rawdata, options)
  94         --print(">> ", rawdata)
  95         local flags = lib14a.ISO14A_COMMAND.ISO14A_NO_DISCONNECT + lib14a.ISO14A_COMMAND.ISO14A_RAW + lib14a.ISO14A_COMMAND.ISO14A_APPEND_CRC
  96         local command = Command:new{cmd = cmds.CMD_READER_ISO_14443a,
  97                                                                         arg1 = flags, -- Send raw
  98                                                                         -- arg2 contains the length, which is half the length
  99                                                                         -- of the ASCII-string rawdata
 100                                                                         arg2 = string.len(rawdata)/2,
 101                                                                         data = rawdata}
 102         return lib14a.sendToDevice(command, options.ignore_response)
 103 end
 104 --
 105 -- Sends an instruction to do nothing, only disconnect
 106 function disconnect()
 107         local command = Command:new{cmd = cmds.CMD_READER_ISO_14443a, arg1 = 0, }
 108         -- We can ignore the response here, no ACK is returned for this command
 109         -- Check /armsrc/iso14443a.c, ReaderIso14443a() for details
 110         return lib14a.sendToDevice(command, true)
 111         --core.console("hf 14a raw -r")
 112 end
 113 ---
 114 -- The main entry point
 115 function main(args)
 116
 117         local ignore_response = false
 118         local endblock = 20
 119
 120         -- Read the parameters
 121         for o, a in getopt.getopt(args, 'hb:') do
 122                 if o == "h" then return help() end
 123                 if o == "b" then endblock = a end
 124         end
 125         endblock = endblock or 20
 126
 127         -- First of all, connect
 128         info, err = lib14a.read1443a(true)
 129         if err then disconnect() return oops(err) end
 130         core.clearCommandBuffer()
 131
 132         local blockData = {}
 133
 134         -- Show tag info
 135         print(("\nFound Card UID [%s]\n"):format(info.uid))
 136
 137         print("blk | data             | xored")
 138         print("----+------------------+-------------------")
 139         for block = 00, endblock do
 140                 local cmd = string.format("10%02x00", block)
 141                 res, err = sendRaw(cmd , {ignore_response = ignore_response})
 142                 if err then disconnect() return oops(err) end
 143
 144                 local cmd_response = Command.parse(res)
 145                 local len = tonumber(cmd_response.arg1) * 2
 146                 local data = string.sub(tostring(cmd_response.data), 0, len-4)
 147
 148                 showdata(block, data)
 149                 table.insert(blockData, data)
 150         end
 151         print("----+------------------+-------------------")
 152         disconnect()
 153
 154         local filename, err = writeDumpFile(info.uid, blockData)
 155         if err then return oops(err) end
 156
 157         print(string.format("\nDumped data into %s", filename))
 158 end
 159
 160
 161
 162
 163 -------------------------
 164 --      Testing
 165 -------------------------
 166 function selftest()
 167         DEBUG = true
 168         dbg("Performing test")
 169         main()
 170         dbg("Tests done")
 171 end
 172 -- Flip the switch here to perform a sanity check.
 173 -- It read a nonce in two different ways, as specified in the usage-section
 174 if "--test"==args then
 175         selftest()
 176 else
 177         -- Call the main
 178         main(args)
 179 end