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>   Specifies 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 -- Usage help
  38 function help()
  39         print(desc)
  40         print("Example usage")
  41         print(example)
  42 end
  43
  44 local function convert_to_ascii(hexdata)
  45         if string.len(hexdata) % 32 ~= 0 then
  46                 return oops(("Bad data, length should be a multiple of 32 (was %d)"):format(string.len(hexdata)))
  47         end
  48
  49         local js,i = "[";
  50         for i = 1, string.len(hexdata),32 do
  51                 js = js .."'" ..string.sub(hexdata,i,i+31).."',\n"
  52         end
  53         js = js .. "]"
  54         return js
  55 end
  56
  57 local function readdump(infile)
  58          t = infile:read("*all")
  59          --print(string.len(t))
  60          len = string.len(t)
  61          local len,hex = bin.unpack(("H%d"):format(len),t)
  62          --print(len,hex)
  63          return hex
  64 end
  65
  66 local function convert_to_emulform(hexdata)
  67         if string.len(hexdata) % 32 ~= 0 then
  68                 return oops(("Bad data, length should be a multiple of 32 (was %d)"):format(string.len(hexdata)))
  69         end
  70         local ascii,i = "";
  71         for i = 1, string.len(hexdata),32 do
  72                 ascii = ascii  ..string.sub(hexdata,i,i+31).."\n"
  73         end
  74
  75         return string.sub(ascii,1,-1)
  76 end
  77
  78 local function main(args)
  79
  80         local input = "dumpdata.bin"
  81         local output
  82
  83         for o, a in getopt.getopt(args, 'i:o:h') do
  84                 if o == "h" then return help() end
  85                 if o == "i" then input = a end
  86                 if o == "o" then output = a end
  87         end
  88         -- Validate the parameters
  89
  90         local infile = io.open(input, "rb")
  91         if infile == nil then
  92                 return oops("Could not read file ", input)
  93         end
  94         local dumpdata = readdump(infile)
  95         -- The hex-data is now in ascii-format,
  96
  97         -- But first, check the uid
  98         local uid = string.sub(dumpdata,1,8)
  99         output = output or (uid .. ".eml")
 100
 101         -- Format some linebreaks
 102         dumpdata = convert_to_emulform(dumpdata)
 103
 104         local outfile = io.open(output, "w")
 105         if outfile == nil then
 106                 return oops("Could not write to file ", output)
 107         end
 108
 109         outfile:write(dumpdata:lower())
 110         io.close(outfile)
 111         print(("Wrote an emulator-dump to the file %s"):format(output))
 112 end
 113
 114
 115 --[[
 116 In the future, we may implement so that scripts are invoked directly
 117 into a 'main' function, instead of being executed blindly. For future
 118 compatibility, I have done so, but I invoke my main from here.
 119 --]]
 120 main(args)