git.zerfleddert.de Git - proxmark3-svn/blob - client/scripts/dumptoemul.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
   6 example = "script run dumptoemul -i dumpdata-foobar.bin"
   7 author = "Martin Holst Swende"
   8 usage = "script run dumptoemul [-i <file>] [-o <file>]"
   9 desc =[[
  10 This script takes a dumpfile from 'hf mf dump' and converts it to a format that can be used
  11 by the emulator
  12
  13 Arguments:
  14         -h                              This help
  15         -i <file>               Specifies the dump-file (input). If omitted, 'dumpdata.bin' is used
  16         -o <filename>   Speciies the output file. If omitted, <uid>.eml is used.
  17
  18 ]]
  19
  20 -------------------------------
  21 -- Some utilities
  22 -------------------------------
  23
  24 ---
  25 -- A debug printout-function
  26 function dbg(args)
  27         if DEBUG then
  28                 print("###", args)
  29         end
  30 end
  31 ---
  32 -- This is only meant to be used when errors occur
  33 function oops(err)
  34         print("ERROR: ",err)
  35 end
  36
  37
  38 ---
  39 -- Usage help
  40 function help()
  41         print(desc)
  42         print("Example usage")
  43         print(example)
  44 end
  45
  46 local function convert_to_ascii(hexdata)
  47         if string.len(hexdata) % 32 ~= 0 then
  48                 return oops(("Bad data, length should be a multiple of 32 (was %d)"):format(string.len(hexdata)))
  49         end
  50
  51         local js,i = "[";
  52         for i = 1, string.len(hexdata),32 do
  53                 js = js .."'" ..string.sub(hexdata,i,i+31).."',\n"
  54         end
  55         js = js .. "]"
  56         return js
  57 end
  58
  59 local function readdump(infile)
  60          t = infile:read("*all")
  61          --print(string.len(t))
  62          len = string.len(t)
  63          local len,hex = bin.unpack(("H%d"):format(len),t)
  64          --print(len,hex)
  65          return hex
  66 end
  67
  68 local function convert_to_emulform(hexdata)
  69         if string.len(hexdata) % 32 ~= 0 then
  70                 return oops(("Bad data, length should be a multiple of 32 (was %d)"):format(string.len(hexdata)))
  71         end
  72         local ascii,i = "";
  73         for i = 1, string.len(hexdata),32 do
  74                 ascii = ascii  ..string.sub(hexdata,i,i+31).."\n"
  75         end
  76         return ascii
  77 end
  78
  79 local function main(args)
  80
  81         local input = "dumpdata.bin"
  82         local output
  83
  84         for o, a in getopt.getopt(args, 'i:o:h') do
  85                 if o == "h" then return help() end
  86                 if o == "i" then input = a end
  87                 if o == "o" then output = a end
  88         end
  89         -- Validate the parameters
  90
  91         local infile = io.open(input, "rb")
  92         if infile == nil then
  93                 return oops("Could not read file ", input)
  94         end
  95         local dumpdata = readdump(infile)
  96         -- The hex-data is now in ascii-format,
  97
  98         -- But first, check the uid
  99         local uid = string.sub(dumpdata,1,8)
 100         output = output or (uid .. ".eml")
 101
 102         -- Format some linebreaks
 103         dumpdata = convert_to_emulform(dumpdata)
 104
 105         local outfile = io.open(output, "w")
 106         if outfile == nil then
 107                 return oops("Could not write to file ", output)
 108         end
 109
 110         outfile:write(dumpdata:lower())
 111         io.close(outfile)
 112         print(("Wrote an emulator-dump to the file %s"):format(output))
 113 end
 114
 115
 116 --[[
 117 In the future, we may implement so that scripts are invoked directly
 118 into a 'main' function, instead of being executed blindly. For future
 119 compatibility, I have done so, but I invoke my main from here.
 120 --]]
 121 main(args)