proxmark3/client/luascripts/dumptoemul-mfu.lua

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-- The getopt-functionality is loaded from pm3/getopt.lua
-- Have a look there for further details
getopt = require('getopt')
bin = require('bin')
copyright = ''
author = "Martin Holst Swende \n @Marshmellow \n @iceman"
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version = 'v1.0.1'
desc =[[
This script takes a dumpfile from 'hf mfu dump' and converts it to a format that can be used
by the emulator
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]]
example = [[
script run dumptoemul-mfu -i dumpdata-foobar.bin
]]
usage = [[
script run dumptoemul-mfu [-i <file>] [-o <file>]
Arguments:
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-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.
]]
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local DEBUG = false
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---
-- A debug printout-function
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local function dbg(args)
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if not DEBUG then return end
if type(args) == 'table' then
local i = 1
while result[i] do
dbg(result[i])
i = i+1
end
else
print('###', args)
end
end
---
-- This is only meant to be used when errors occur
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local function oops(err)
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print('ERROR:', err)
core.clearCommandBuffer()
return nil, err
end
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---
-- Usage help
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local function help()
print(copyright)
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print(author)
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print(version)
print(desc)
print('Example usage')
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print(example)
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print(usage)
end
local function convert_to_ascii(hexdata)
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if string.len(hexdata) % 8 ~= 0 then
return oops(("Bad data, length should be a multiple of 8 (was %d)"):format(string.len(hexdata)))
end
local js,i = "[";
for i = 1, string.len(hexdata),8 do
js = js .."'" ..string.sub(hexdata,i,i+7).."',\n"
end
js = js .. "]"
return js
end
local function readdump(infile)
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t = infile:read('*all')
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len = string.len(t)
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local len,hex = bin.unpack(('H%d'):format(len),t)
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return hex
end
local function convert_to_emulform(hexdata)
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if string.len(hexdata) % 8 ~= 0 then
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return oops(('Bad data, length should be a multiple of 8 (was %d)'):format(string.len(hexdata)))
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end
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local ascii,i = '';
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for i = 1, string.len(hexdata), 8 do
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ascii = ascii..string.sub(hexdata, i, i+7)..'\n'
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end
return string.sub(ascii, 1, -2)
end
local function main(args)
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local input = 'dumpdata.bin'
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local output
for o, a in getopt.getopt(args, 'i:o:h') do
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if o == 'h' then return help() end
if o == 'i' then input = a end
if o == 'o' then output = a end
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end
-- Validate the parameters
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local infile = io.open(input, 'rb')
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if infile == nil then
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return oops('Could not read file ', input)
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end
local dumpdata = readdump(infile)
-- The hex-data is now in ascii-format,
-- But first, check the uid
-- lua uses start index and endindex, not count.
-- UID is 3three skip bcc0 then 4bytes.
-- 1 lua is one-index.
-- 1 + 112 (56*2) new dump format has version/signature/counter data here
-- 113,114,115,116,117,118 UID first three bytes
-- 119,120 bcc0
-- 121--- UID last four bytes
local uid = string.sub(dumpdata, 113, 113+5)..string.sub(dumpdata, 113+8, 113+8+7)
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output = output or (uid .. '.eml')
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-- Format some linebreaks
dumpdata = convert_to_emulform(dumpdata)
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local outfile = io.open(output, 'w')
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if outfile == nil then
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return oops('Could not write to file ', output)
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end
outfile:write(dumpdata:lower())
io.close(outfile)
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print(('Wrote an emulator-dump to the file %s'):format(output))
end
--[[
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In the future, we may implement so that scripts are invoked directly
into a 'main' function, instead of being executed blindly. For future
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compatibility, I have done so, but I invoke my main from here.
--]]
main(args)