git.zerfleddert.de Git - proxmark3-svn/blob - client/lualibs/read14b.lua

   1 --[[
   2         This is a library to read 14443b tags. It can be used something like this
   3
   4         local reader = require('read14b')
   5         result, err = reader.select1443b()
   6         if not result then
   7                 print(err)
   8                 return
   9         end
  10         print(result.name)
  11
  12 --]]
  13 -- Loads the commands-library
  14 local cmds = require('commands')
  15 local utils = require('utils')
  16 local TIMEOUT = 2500
  17 local ISO14B_COMMAND = {
  18         ISO14B_CONNECT = 1,
  19         ISO14B_DISCONNECT = 2,
  20         ISO14B_APDU = 4,
  21         ISO14B_RAW = 8,
  22         ISO14B_REQUEST_TRIGGER = 0x10,
  23         ISO14B_APPEND_CRC = 0x20,
  24         ISO14B_SELECT_STD = 0x40,
  25         ISO14B_SELECT_SR = 0x80,
  26 }
  27
  28 local function parse1443b(data)
  29         --[[
  30
  31         Based on this struct :
  32
  33         typedef struct {
  34                 byte_t uid[10];
  35                 byte_t uidlen;
  36                 byte_t atqb[7];
  37                 byte_t chipid;
  38                 byte_t cid;
  39         } __attribute__((__packed__)) iso14b_card_select_t;
  40
  41         --]]
  42
  43         local count, uid, uidlen, atqb, chipid, cid = bin.unpack('H10CH7CC',data)
  44         uid = uid:sub(1,2*uidlen)
  45         return { uid = uid, uidlen = uidlen, atqb = atqb, chipid = chipid, cid = cid }
  46 end
  47
  48 --- Sends a USBpacket to the device
  49 -- @param command - the usb packet to send
  50 -- @param ignoreresponse - if set to true, we don't read the device answer packet
  51 --              which is usually recipe for fail. If not sent, the host will wait 2s for a
  52 --              response of type CMD_ACK
  53 -- @return      packet,nil if successfull
  54 --                      nil, errormessage if unsuccessfull
  55 local function sendToDevice(cmd, ignoreresponse)
  56         --core.clearCommandBuffer()
  57         local bytes = cmd:getBytes()
  58         local count,c,arg0,arg1,arg2 = bin.unpack('LLLL',bytes)
  59         local err = core.SendCommand(cmd:getBytes())
  60         if err then
  61                 print('ERROR',err)
  62                 return nil, err
  63         end
  64         if ignoreresponse then return nil,nil end
  65
  66         local response = core.WaitForResponseTimeout(cmds.CMD_ACK, TIMEOUT)
  67         return response,nil
  68 end
  69 --- Picks out and displays the data read from a tag
  70 -- Specifically, takes a usb packet, converts to a Command
  71 -- (as in commands.lua), takes the data-array and
  72 -- reads the number of bytes specified in arg1 (arg0 in c-struct)
  73 -- and displays the data
  74 -- @param usbpacket the data received from the device
  75 local function showData(usbpacket)
  76         local response = Command.parse(usbpacket)
  77         local len = response.arg2 * 2
  78         local data = string.sub(response.data, 0, len);
  79         print("<< ",data)
  80 end
  81
  82
  83 -- This function does a connect and retrieves some info
  84 -- @return if successfull: an table containing card info
  85 -- @return if unsuccessfull : nil, error
  86 local function read14443b(disconnect)
  87
  88         local command, result, info, err, data
  89
  90         local flags = ISO14B_COMMAND.ISO14B_CONNECT +
  91                                   ISO14B_COMMAND.ISO14B_SELECT_STD
  92
  93         if disconnect then
  94                 print('DISCONNECT')
  95                 flags = flags + ISO14B_COMMAND.ISO14B_DISCONNECT
  96         end
  97
  98         command = Command:new{cmd = cmds.CMD_ISO_14443B_COMMAND, arg1 = flags}
  99         local result,err = sendToDevice(command, false)
 100         if result then
 101                 local count,cmd,arg0,arg1,arg2 = bin.unpack('LLLL',result)
 102                 if arg0 == 0 then
 103                         data = string.sub(result, count)
 104                         info, err = parse1443b(data)
 105                 else
 106                         err = "iso14443b card select failed"
 107                 end
 108         else
 109                 err = "No response from card"
 110         end
 111
 112         if err then
 113                 print(err)
 114                 return nil, err
 115         end
 116         return info
 117 end
 118 --PING / PONG - Custom Anticollison for Navigo.
 119 -- AA / BB ?!?
 120 -- local ping = ('BA00')
 121 -- result, err = sendRaw(ping, 1, 1)
 122 -- if result then
 123         -- resp = Command.parse( result )
 124         -- if arg1 == 0 then
 125                 -- return nil, "iso14443b card - PING/PONG failed"
 126         -- end
 127         -- showData(result)
 128 -- else
 129         -- err = "No response from card"
 130         -- print(err)
 131         -- return nil, err
 132 -- end
 133
 134
 135 ---
 136 -- Waits for a mifare card to be placed within the vicinity of the reader.
 137 -- @return if successfull: an table containing card info
 138 -- @return if unsuccessfull : nil, error
 139 local function waitFor14443b()
 140         print("Waiting for card... press any key to quit")
 141         while not core.ukbhit() do
 142                 res, err = read14443b(false)
 143                 if res then return res end
 144                 -- err means that there was no response from card
 145         end
 146         return nil, "Aborted by user"
 147 end
 148
 149 local library = {
 150         parse1443b  = parse1443b,
 151         read1443b       = read14443b,
 152         waitFor14443b = waitFor14443b,
 153         sendToDevice = sendToDevice,
 154         showData = showData,
 155         ISO14B_COMMAND = ISO14B_COMMAND,
 156 }
 157
 158 return library