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