git.zerfleddert.de Git - proxmark3-svn/blob - client/scripts/dumptoemul-mfu.lua

   1 -- The getopt-functionality is loaded from pm3/getopt.lua
   2 -- Have a look there for further details
   3 getopt = require('getopt')
   4 bin = require('bin')
   5 example = "script run dumptoemul-mfu -i dumpdata-foobar.bin"
   6 author = "Martin Holst Swende \n @Marshmellow"
   7 usage = "script run dumptoemul-mfu [-i <file>] [-o <file>]"
   8 desc =[[
   9 This script takes a dumpfile from 'hf mfu dump' and converts it to a format that can be used
  10 by the emulator
  11
  12 Arguments:
  13         -h                              This help
  14         -i <file>               Specifies the dump-file (input). If omitted, 'dumpdata.bin' is used
  15         -o <filename>   Specifies the output file. If omitted, <uid>.eml is used.
  16
  17 ]]
  18 ---
  19 -- A debug printout-function
  20 function dbg(args)
  21         if DEBUG then
  22                 print("###", args)
  23         end
  24 end
  25 ---
  26 -- This is only meant to be used when errors occur
  27 function oops(err)
  28         print("ERROR: ",err)
  29 end
  30
  31 ---
  32 -- Usage help
  33 function help()
  34         print(desc)
  35         print(author)
  36         print("Example usage")
  37         print(example)
  38 end
  39
  40 local function convert_to_ascii(hexdata)
  41         if string.len(hexdata) % 8 ~= 0 then
  42                 return oops(("Bad data, length should be a multiple of 8 (was %d)"):format(string.len(hexdata)))
  43         end
  44
  45         local js,i = "[";
  46         for i = 1, string.len(hexdata),8 do
  47                 js = js .."'" ..string.sub(hexdata,i,i+7).."',\n"
  48         end
  49         js = js .. "]"
  50         return js
  51 end
  52
  53 local function readdump(infile)
  54          t = infile:read("*all")
  55          --print(string.len(t))
  56          len = string.len(t)
  57          local len,hex = bin.unpack(("H%d"):format(len),t)
  58          --print(len,hex)
  59          return hex
  60 end
  61
  62 local function convert_to_emulform(hexdata)
  63         if string.len(hexdata) % 8 ~= 0 then
  64                 return oops(("Bad data, length should be a multiple of 8 (was %d)"):format(string.len(hexdata)))
  65         end
  66         local ascii,i = "";
  67         for i = 1, string.len(hexdata),8 do
  68                 ascii = ascii  ..string.sub(hexdata,i,i+7).."\n"
  69         end
  70
  71         return string.sub(ascii,1,-1)
  72 end
  73
  74 local function main(args)
  75
  76         local input = "dumpdata.bin"
  77         local output
  78
  79         for o, a in getopt.getopt(args, 'i:o:h') do
  80                 if o == "h" then return help() end
  81                 if o == "i" then input = a end
  82                 if o == "o" then output = a end
  83         end
  84         -- Validate the parameters
  85
  86         local infile = io.open(input, "rb")
  87         if infile == nil then
  88                 return oops("Could not read file ", input)
  89         end
  90         local dumpdata = readdump(infile)
  91         -- The hex-data is now in ascii-format,
  92
  93         -- But first, check the uid
  94         local uid = string.sub(dumpdata,1+48,8)
  95         output = output or (uid .. ".eml")
  96
  97         -- Format some linebreaks
  98         dumpdata = convert_to_emulform(dumpdata)
  99
 100         local outfile = io.open(output, "w")
 101         if outfile == nil then
 102                 return oops("Could not write to file ", output)
 103         end
 104
 105         outfile:write(dumpdata:lower())
 106         io.close(outfile)
 107         print(("Wrote an emulator-dump to the file %s"):format(output))
 108 end
 109
 110
 111 --[[
 112 In the future, we may implement so that scripts are invoked directly
 113 into a 'main' function, instead of being executed blindly. For future
 114 compatibility, I have done so, but I invoke my main from here.
 115 --]]
 116 main(args)