mirror of
https://github.com/RfidResearchGroup/proxmark3.git
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136 lines
3.4 KiB
Lua
136 lines
3.4 KiB
Lua
--[[
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This is a library to read 14443b tags. It can be used something like this
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local reader = require('read14b')
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result, err = reader.read14443b()
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if not result then
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print(err)
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return
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end
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print(result.name)
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--]]
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-- Loads the commands-library
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local cmds = require('commands')
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local utils = require('utils')
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-- Shouldn't take longer than 2.5 seconds
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local TIMEOUT = 2000
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local ISO14B_COMMAND = {
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ISO14B_CONNECT = 0x1,
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ISO14B_DISCONNECT = 0x2,
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ISO14B_APDU = 0x4,
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ISO14B_RAW = 0x8,
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ISO14B_REQUEST_TRIGGER = 0x10,
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ISO14B_APPEND_CRC = 0x20,
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ISO14B_SELECT_STD = 0x40,
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ISO14B_SELECT_SR = 0x80,
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ISO14B_SET_TIMEOUT = 0x100,
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}
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local function parse14443b(data)
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--[[
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Based on this struct :
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typedef struct {
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uint8_t uid[10];
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uint8_t uidlen;
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uint8_t atqb[7];
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uint8_t chipid;
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uint8_t cid;
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} PACKED iso14b_card_select_t;
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--]]
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local count, uid, uidlen, atqb, chipid, cid = bin.unpack('H10CH7CC',data)
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uid = uid:sub(1, 2 * uidlen)
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return {
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uid = uid,
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uidlen = uidlen,
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atqb = atqb,
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chipid = chipid,
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cid = cid
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}
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end
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-- This function does a connect and retrieves some info
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-- @return if successful: an table containing card info
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-- @return if unsuccessful : nil, error
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local function read14443b(disconnect)
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local command, result, info, err, data
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local flags = ISO14B_COMMAND.ISO14B_CONNECT +
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ISO14B_COMMAND.ISO14B_SELECT_STD
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if disconnect then
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print('DISCONNECT')
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flags = flags + ISO14B_COMMAND.ISO14B_DISCONNECT
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end
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command = Command:newMIX{
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cmd = cmds.CMD_HF_ISO14443B_COMMAND,
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arg1 = flags
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}
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info = nil
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local result, err = command:sendMIX(false, TIMEOUT, true)
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if result then
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local count,cmd,arg0,arg1,arg2 = bin.unpack('LLLL', result)
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if arg0 == 0 then
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data = string.sub(result, count)
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info, err = parse14443b(data)
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else
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err = 'iso14443b card select failed'
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end
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else
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err = 'No response from card'
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end
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if err then
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return nil, err
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end
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return info, nil
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end
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---
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-- Waits for a mifare card to be placed within the vicinity of the reader.
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-- @return if successful: an table containing card info
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-- @return if unsuccessful : nil, error
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local function waitFor14443b()
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print('Waiting for card... press Enter to quit')
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while not core.kbd_enter_pressed() do
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res, err = read14443b(false)
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if res then return res, err end
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-- err means that there was no response from card
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end
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return nil, 'Aborted by user'
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end
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---
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-- turns on the HF field.
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local function connect14443b()
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local c = Command:newMIX{cmd = cmds.CMD_HF_ISO14443B_COMMAND, arg1 = ISO14B_COMMAND.ISO14B_CONNECT}
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return c:sendMIX(true)
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end
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---
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-- Sends an instruction to do nothing, only disconnect
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local function disconnect14443b()
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local c = Command:newMIX{cmd = cmds.CMD_HF_ISO14443B_COMMAND, arg1 = ISO14B_COMMAND.ISO14B_DISCONNECT}
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-- We can ignore the response here, no ACK is returned for this command
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-- Check /armsrc/iso14443b.c, ReaderIso14443b() for details
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return c:sendMIX(true)
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end
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local library = {
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read = read14443b,
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waitFor14443b = waitFor14443b,
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parse14443b = parse14443b,
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connect = connect14443b,
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disconnect = disconnect14443b,
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ISO14B_COMMAND = ISO14B_COMMAND,
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}
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return library
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