+local cmds = require('commands')
+local getopt = require('getopt')
+local lib14a = require('read14a')
+
+example = "script run writerraw -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
+
+Examples :
+
+# 1. Connect and don't disconnect
+script run writeraw -p
+# 2. Send mf auth, read response (nonce)
+script run writeraw -o -x 6000F57b -p
+# 3. disconnect
+script run writeraw -o
+
+# All three steps in one go:
+script run writeraw -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
+function dbg(args)
+ if DEBUG then
+ print("# ", args)
+ end
+end
+---
+-- This is only meant to be used when errors occur
+function oops(err)
+ print("ERROR: ",err)
+end
+
+
+---
+-- Usage help
+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
+ local appendcrc = false
+ local stayconnected = false
+ local payload = nil
+ local doconnect = true
+
+ -- Read the parameters
+ for o, a in getopt.getopt(args, 'corcpx:') do
+ if o == "o" then doconnect = false end
+ if o == "r" then ignore_response = true end
+ if o == "c" then appendcrc = true end
+ if o == "p" then stayconnected = true end
+ if o == "x" then payload = a end
+ if o == "d" then DEBUG = true end
+ end
+
+ -- First of all, connect
+ if doconnect then
+ dbg("doconnect")
+ -- We reuse the connect functionality from a
+ -- common library
+ info, err = lib14a.read1443a(true)
+
+ 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
+ res,err = sendRaw(payload,{ignore_response = ignore_response})
+ 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
+
+ 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, -- Nothing
+ }
+ -- 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()
+ main("-p")
+ main(" -o -x 6000F57b -p")
+ main("-o")
+ main("-x 6000F57b")
+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 false then
+ selftest()
+else
+ -- Call the main
+ main(args)
+end
projects / proxmark3-svn / commitdiff