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Changed the name of writeraw into 14araw
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martin.holst@gmail.com
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commit
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@ -1,183 +0,0 @@
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local cmds = require('commands')
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local getopt = require('getopt')
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local lib14a = require('read14a')
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example = "script run writerraw -x 6000F57b"
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author = "Martin Holst Swende"
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desc =
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[[
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This is a script to allow raw 1444a commands to be sent and received.
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Arguments:
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-o do not connect - use this only if you previously used -p to stay connected
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-r do not read response
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-c calculate and append CRC
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-p stay connected - dont inactivate the field
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-x <payload> Data to send (NO SPACES!)
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-d Debug flag
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Examples :
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# 1. Connect and don't disconnect
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script run writeraw -p
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# 2. Send mf auth, read response (nonce)
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script run writeraw -o -x 6000F57b -p
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# 3. disconnect
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script run writeraw -o
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# All three steps in one go:
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script run writeraw -x 6000F57b
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]]
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--[[
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This script communicates with
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/armsrc/iso14443a.c, specifically ReaderIso14443a() at around line 1779 and onwards.
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Check there for details about data format and how commands are interpreted on the
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device-side.
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]]
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-- Some globals
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local TIMEOUT = 2000 -- Shouldn't take longer than 2 seconds
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local DEBUG = false -- the debug flag
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-------------------------------
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-- Some utilities
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-------------------------------
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---
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-- A debug printout-function
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function dbg(args)
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if DEBUG then
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print("# ", args)
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end
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end
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---
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-- This is only meant to be used when errors occur
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function oops(err)
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print("ERROR: ",err)
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end
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---
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-- Usage help
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function help()
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print(desc)
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print("Example usage")
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print(example)
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end
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---
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-- The main entry point
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function main(args)
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if args == nil or #args == 0 then
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return help()
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end
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local ignore_response = false
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local appendcrc = false
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local stayconnected = false
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local payload = nil
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local doconnect = true
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-- Read the parameters
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for o, a in getopt.getopt(args, 'corcpx:') do
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if o == "o" then doconnect = false end
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if o == "r" then ignore_response = true end
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if o == "c" then appendcrc = true end
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if o == "p" then stayconnected = true end
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if o == "x" then payload = a end
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if o == "d" then DEBUG = true end
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end
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-- First of all, connect
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if doconnect then
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dbg("doconnect")
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-- We reuse the connect functionality from a
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-- common library
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info, err = lib14a.read1443a(true)
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if err then return oops(err) end
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print(("Connected to card, uid = %s"):format(info.uid))
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end
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-- The actual raw payload, if any
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if payload then
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res,err = sendRaw(payload,{ignore_response = ignore_response})
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if err then return oops(err) end
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if not ignoreresponse then
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-- Display the returned data
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showdata(res)
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end
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end
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-- And, perhaps disconnect?
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if not stayconnected then
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disconnect()
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end
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end
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--- Picks out and displays the data read from a tag
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-- Specifically, takes a usb packet, converts to a Command
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-- (as in commands.lua), takes the data-array and
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-- reads the number of bytes specified in arg1 (arg0 in c-struct)
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-- and displays the data
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-- @param usbpacket the data received from the device
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function showdata(usbpacket)
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local cmd_response = Command.parse(usbpacket)
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local len = tonumber(cmd_response.arg1) *2
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--print("data length:",len)
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local data = string.sub(tostring(cmd_response.data), 0, len);
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print("<< ",data)
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--print("----------------")
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end
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function sendRaw(rawdata, options)
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print(">> ", rawdata)
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local flags = lib14a.ISO14A_COMMAND.ISO14A_NO_DISCONNECT + lib14a.ISO14A_COMMAND.ISO14A_RAW
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local command = Command:new{cmd = cmds.CMD_READER_ISO_14443a,
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arg1 = flags, -- Send raw
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-- arg2 contains the length, which is half the length
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-- of the ASCII-string rawdata
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arg2 = string.len(rawdata)/2,
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data = rawdata}
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return lib14a.sendToDevice(command, options.ignore_response)
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end
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-- Sends an instruction to do nothing, only disconnect
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function disconnect()
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local command = Command:new{cmd = cmds.CMD_READER_ISO_14443a,
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arg1 = 0, -- Nothing
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}
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-- We can ignore the response here, no ACK is returned for this command
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-- Check /armsrc/iso14443a.c, ReaderIso14443a() for details
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return lib14a.sendToDevice(command,true)
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end
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-------------------------
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-- Testing
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-------------------------
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function selftest()
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main("-p")
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main(" -o -x 6000F57b -p")
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main("-o")
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main("-x 6000F57b")
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end
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-- Flip the switch here to perform a sanity check.
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-- It read a nonce in two different ways, as specified in the usage-section
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if false then
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selftest()
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else
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-- Call the main
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main(args)
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end
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