proxmark3/client/scripts/dumptoemul.lua
2015-05-26 20:31:07 -04:00

123 lines
2.9 KiB
Lua

-- The getopt-functionality is loaded from pm3/getopt.lua
-- Have a look there for further details
getopt = require('getopt')
bin = require('bin')
example = "script run dumptoemul -i dumpdata-foobar.bin"
author = "Martin Holst Swende"
usage = "script run dumptoemul [-i <file>] [-o <file>]"
desc =[[
This script takes a dumpfile from 'hf mf dump' and converts it to a format that can be used
by the emulator
Arguments:
-h This help
-i <file> Specifies the dump-file (input). If omitted, 'dumpdata.bin' is used
-o <filename> Specifies the output file. If omitted, <uid>.eml is used.
]]
-------------------------------
-- 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
local function convert_to_ascii(hexdata)
if string.len(hexdata) % 32 ~= 0 then
return oops(("Bad data, length should be a multiple of 32 (was %d)"):format(string.len(hexdata)))
end
local js,i = "[";
for i = 1, string.len(hexdata),32 do
js = js .."'" ..string.sub(hexdata,i,i+31).."',\n"
end
js = js .. "]"
return js
end
local function readdump(infile)
t = infile:read("*all")
--print(string.len(t))
len = string.len(t)
local len,hex = bin.unpack(("H%d"):format(len),t)
--print(len,hex)
return hex
end
local function convert_to_emulform(hexdata)
if string.len(hexdata) % 32 ~= 0 then
return oops(("Bad data, length should be a multiple of 32 (was %d)"):format(string.len(hexdata)))
end
local ascii,i = "";
for i = 1, string.len(hexdata),32 do
ascii = ascii ..string.sub(hexdata,i,i+31).."\n"
end
return string.sub(ascii,1,-1)
end
local function main(args)
local input = "dumpdata.bin"
local output
for o, a in getopt.getopt(args, 'i:o:h') do
if o == "h" then return help() end
if o == "i" then input = a end
if o == "o" then output = a end
end
-- Validate the parameters
local infile = io.open(input, "rb")
if infile == nil then
return oops("Could not read file ", input)
end
local dumpdata = readdump(infile)
-- The hex-data is now in ascii-format,
-- But first, check the uid
local uid = string.sub(dumpdata,1,8)
output = output or (uid .. ".eml")
-- Format some linebreaks
dumpdata = convert_to_emulform(dumpdata)
local outfile = io.open(output, "w")
if outfile == nil then
return oops("Could not write to file ", output)
end
outfile:write(dumpdata:lower())
io.close(outfile)
print(("Wrote an emulator-dump to the file %s"):format(output))
end
--[[
In the future, we may implement so that scripts are invoked directly
into a 'main' function, instead of being executed blindly. For future
compatibility, I have done so, but I invoke my main from here.
--]]
main(args)