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