proxmark3/client/scripts/14araw.lua

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local cmds = require('commands')
local getopt = require('getopt')
local lib14a = require('read14a')
example = "script run 14araw -x 6000F57b"
author = "Martin Holst Swende"
desc =
[[
This is a script to allow raw 1444a commands to be sent and received.
Arguments:
-o do not connect - use this only if you previously used -p to stay connected
-r do not read response
-c calculate and append CRC
-p stay connected - dont inactivate the field
-x <payload> Data to send (NO SPACES!)
-d Debug flag
-t Topaz mode
-3 ISO14443-4 (use RATS)
Examples :
# 1. Connect and don't disconnect
script run 14araw -p
# 2. Send mf auth, read response (nonce)
script run 14araw -o -x 6000F57b -p
# 3. disconnect
script run 14araw -o
# All three steps in one go:
script run 14araw -x 6000F57b
]]
--[[
This script communicates with
/armsrc/iso14443a.c, specifically ReaderIso14443a() at around line 1779 and onwards.
Check there for details about data format and how commands are interpreted on the
device-side.
]]
-- Some globals
local TIMEOUT = 2000 -- Shouldn't take longer than 2 seconds
local DEBUG = false -- the debug flag
-------------------------------
-- Some utilities
-------------------------------
---
-- A debug printout-function
local function dbg(args)
if DEBUG then
print("###", args)
end
end
---
-- This is only meant to be used when errors occur
local function oops(err)
print("ERROR: ",err)
end
---
-- Usage help
local function help()
print(desc)
print("Example usage")
print(example)
end
---
-- The main entry point
function main(args)
if args == nil or #args == 0 then return help() end
local ignore_response = false
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local append_crc = false
local stayconnected = false
local payload = nil
local doconnect = true
local topaz_mode = false
local no_rats = false
-- Read the parameters
for o, a in getopt.getopt(args, 'orcpx:dt3') do
if o == "o" then doconnect = false end
if o == "r" then ignore_response = true end
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if o == "c" then append_crc = true end
if o == "p" then stayconnected = true end
if o == "x" then payload = a end
if o == "d" then DEBUG = true end
if o == "t" then topaz_mode = true end
if o == "3" then no_rats = true end
end
-- First of all, connect
if doconnect then
dbg("doconnect")
-- We reuse the connect functionality from a
-- common library
info, err = lib14a.read(true, no_rats)
if err then return oops(err) end
print(("Connected to card, uid = %s"):format(info.uid))
end
-- The actual raw payload, if any
if payload then
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res,err = sendRaw(payload,{ignore_response = ignore_response, topaz_mode = topaz_mode, append_crc = append_crc})
if err then return oops(err) end
if not ignoreresponse then
-- Display the returned data
showdata(res)
end
end
-- And, perhaps disconnect?
if not stayconnected then
disconnect()
end
end
--- Picks out and displays the data read from a tag
-- Specifically, takes a usb packet, converts to a Command
-- (as in commands.lua), takes the data-array and
-- reads the number of bytes specified in arg1 (arg0 in c-struct)
-- and displays the data
-- @param usbpacket the data received from the device
function showdata(usbpacket)
local cmd_response = Command.parse(usbpacket)
local len = tonumber(cmd_response.arg1) *2
--print("data length:",len)
local data = string.sub(tostring(cmd_response.data), 0, len);
print("<< ",data)
--print("----------------")
end
function sendRaw(rawdata, options)
print(">> ", rawdata)
local flags = lib14a.ISO14A_COMMAND.ISO14A_NO_DISCONNECT + lib14a.ISO14A_COMMAND.ISO14A_RAW
if options.topaz_mode then
flags = flags + lib14a.ISO14A_COMMAND.ISO14A_TOPAZMODE
end
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if options.append_crc then
flags = flags + lib14a.ISO14A_COMMAND.ISO14A_APPEND_CRC
end
local command = Command:new{cmd = cmds.CMD_READER_ISO_14443a,
arg1 = flags, -- Send raw
-- arg2 contains the length, which is half the length
-- of the ASCII-string rawdata
arg2 = string.len(rawdata)/2,
data = rawdata}
return lib14a.sendToDevice(command, options.ignore_response)
end
-- Sends an instruction to do nothing, only disconnect
function disconnect()
local command = Command:new{cmd = cmds.CMD_READER_ISO_14443a, arg1 = 0, }
-- We can ignore the response here, no ACK is returned for this command
-- Check /armsrc/iso14443a.c, ReaderIso14443a() for details
return lib14a.sendToDevice(command,true)
end
-------------------------
-- Testing
-------------------------
function selftest()
DEBUG = true
dbg("Performing test")
main()
main("-p")
main(" -o -x 6000F57b -p")
main("-o")
main("-x 6000F57b")
dbg("Tests done")
end
-- Flip the switch here to perform a sanity check.
-- It read a nonce in two different ways, as specified in the usage-section
if "--test"==args then
selftest()
else
-- Call the main
main(args)
end