client/lualibs/read14a.lua

   1 --[[
   2         This is a library to read 14443a tags. It can be used something like this
   3
   4         local reader = require('read14a')
   5         result, err = reader.read1443a()
   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 TIMEOUT = 2000 -- Shouldn't take longer than 2 seconds
  16 local ISO14A_COMMAND = {
  17         ISO14A_CONNECT = 1,
  18         ISO14A_NO_DISCONNECT = 2,
  19         ISO14A_APDU = 4,
  20         ISO14A_RAW = 8,
  21         ISO14A_REQUEST_TRIGGER = 0x10,
  22         ISO14A_APPEND_CRC = 0x20,
  23         ISO14A_SET_TIMEOUT = 0x40,
  24         ISO14A_NO_SELECT = 0x80,
  25         ISO14A_TOPAZMODE = 0x100
  26 }
  27
  28 local ISO14443a_TYPES = {}
  29 ISO14443a_TYPES[0x00] = "NXP MIFARE Ultralight | Ultralight C"
  30 ISO14443a_TYPES[0x01] = "NXP MIFARE TNP3xxx Activision Game Appliance"
  31 ISO14443a_TYPES[0x04] = "NXP MIFARE (various !DESFire !DESFire EV1)"
  32 ISO14443a_TYPES[0x08] = "NXP MIFARE CLASSIC 1k | Plus 2k"
  33 ISO14443a_TYPES[0x09] = "NXP MIFARE Mini 0.3k"
  34 ISO14443a_TYPES[0x10] = "NXP MIFARE Plus 2k"
  35 ISO14443a_TYPES[0x11] = "NXP MIFARE Plus 4k"
  36 ISO14443a_TYPES[0x18] = "NXP MIFARE Classic 4k | Plus 4k"
  37 ISO14443a_TYPES[0x20] = "NXP MIFARE DESFire 4k | DESFire EV1 2k/4k/8k | Plus 2k/4k | JCOP 31/41"
  38 ISO14443a_TYPES[0x24] = "NXP MIFARE DESFire | DESFire EV1"
  39 ISO14443a_TYPES[0x28] = "JCOP31 or JCOP41 v2.3.1"
  40 ISO14443a_TYPES[0x38] = "Nokia 6212 or 6131 MIFARE CLASSIC 4K"
  41 ISO14443a_TYPES[0x88] = "Infineon MIFARE CLASSIC 1K"
  42 ISO14443a_TYPES[0x98] = "Gemplus MPCOS"
  43
  44
  45 local function tostring_1443a(sak)
  46         return ISO14443a_TYPES[sak] or ("Unknown (SAK=%x)"):format(sak)
  47 end
  48
  49 local function parse1443a(data)
  50         --[[
  51
  52         Based on this struct :
  53
  54         typedef struct {
  55                 byte_t uid[10];
  56                 byte_t uidlen;
  57                 byte_t atqa[2];
  58                 byte_t sak;
  59                 byte_t ats_len;
  60                 byte_t ats[256];
  61         } __attribute__((__packed__)) iso14a_card_select_t;
  62
  63         --]]
  64
  65         local count,uid,uidlen, atqa, sak, ats_len, ats= bin.unpack('H10CH2CC',data)
  66         uid = uid:sub(1,2*uidlen)
  67         --print("uid, atqa, sak: ",uid, atqa, sak)
  68         --print("TYPE: ", tostring_1443a(sak))
  69         return { uid = uid, atqa  = atqa, sak = sak, name = tostring_1443a(sak)}
  70 end
  71
  72 --- Sends a USBpacket to the device
  73 -- @param command - the usb packet to send
  74 -- @param ignoreresponse - if set to true, we don't read the device answer packet
  75 --              which is usually recipe for fail. If not sent, the host will wait 2s for a
  76 --              response of type CMD_ACK
  77 -- @return      packet,nil if successfull
  78 --                      nil, errormessage if unsuccessfull
  79
  80 local function sendToDevice(command, ignoreresponse)
  81         core.clearCommandBuffer()
  82         local err = core.SendCommand(command:getBytes())
  83         if err then
  84                 print(err)
  85                 return nil, err
  86         end
  87         if ignoreresponse then return nil,nil end
  88
  89         local response = core.WaitForResponseTimeout(cmds.CMD_ACK,TIMEOUT)
  90         return response,nil
  91 end
  92
  93 -- This function does a connect and retrieves som einfo
  94 -- @param dont_disconnect - if true, does not disable the field
  95 -- @return if successfull: an table containing card info
  96 -- @return if unsuccessfull : nil, error
  97 local function read14443a(dont_disconnect)
  98         local command, result, info, err, data
  99
 100         command = Command:new{cmd = cmds.CMD_READER_ISO_14443a,
 101                                                                 arg1 = ISO14A_COMMAND.ISO14A_CONNECT}
 102         if dont_disconnect then
 103                 command.arg1 = command.arg1 + ISO14A_COMMAND.ISO14A_NO_DISCONNECT
 104         end
 105         local result,err = sendToDevice(command)
 106         if result then
 107                 local count,cmd,arg0,arg1,arg2 = bin.unpack('LLLL',result)
 108                 if arg0 == 0 then
 109                         return nil, "iso14443a card select failed"
 110                 end
 111                 data = string.sub(result,count)
 112                 info, err = parse1443a(data)
 113         else
 114                 err ="No response from card"
 115         end
 116
 117         if err then
 118                 print(err)
 119                 return nil, err
 120         end
 121         return info
 122 end
 123
 124 ---
 125 -- Waits for a mifare card to be placed within the vicinity of the reader.
 126 -- @return if successfull: an table containing card info
 127 -- @return if unsuccessfull : nil, error
 128 local function waitFor14443a()
 129         print("Waiting for card... press any key to quit")
 130         while not core.ukbhit() do
 131                 res, err = read14443a()
 132                 if res then return res end
 133                 -- err means that there was no response from card
 134         end
 135         return nil, "Aborted by user"
 136 end
 137 local library = {
 138
 139         read1443a = read14443a,
 140         read    = read14443a,
 141         waitFor14443a = waitFor14443a,
 142         parse1443a = parse1443a,
 143         sendToDevice = sendToDevice,
 144         ISO14A_COMMAND = ISO14A_COMMAND,
 145 }
 146
 147 return library