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[proxmark3-svn] / 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
38 ---
39 -- Usage help
40 function help()
41 print(desc)
42 print("Example usage")
43 print(example)
44 end
45
46 local function convert_to_ascii(hexdata)
47 if string.len(hexdata) % 32 ~= 0 then
48 return oops(("Bad data, length should be a multiple of 32 (was %d)"):format(string.len(hexdata)))
49 end
50
51 local js,i = "[";
52 for i = 1, string.len(hexdata),32 do
53 js = js .."'" ..string.sub(hexdata,i,i+31).."',\n"
54 end
55 js = js .. "]"
56 return js
57 end
58
59 local function readdump(infile)
60 t = infile:read("*all")
61 --print(string.len(t))
62 len = string.len(t)
63 local len,hex = bin.unpack(("H%d"):format(len),t)
64 --print(len,hex)
65 return hex
66 end
67
68 local function convert_to_emulform(hexdata)
69 if string.len(hexdata) % 32 ~= 0 then
70 return oops(("Bad data, length should be a multiple of 32 (was %d)"):format(string.len(hexdata)))
71 end
72 local ascii,i = "";
73 for i = 1, string.len(hexdata),32 do
74 ascii = ascii ..string.sub(hexdata,i,i+31).."\n"
75 end
76 return ascii
77 end
78
79 local function main(args)
80
81 local input = "dumpdata.bin"
82 local output
83
84 for o, a in getopt.getopt(args, 'i:o:h') do
85 if o == "h" then return help() end
86 if o == "i" then input = a end
87 if o == "o" then output = a end
88 end
89 -- Validate the parameters
90
91 local infile = io.open(input, "rb")
92 if infile == nil then
93 return oops("Could not read file ", input)
94 end
95 local dumpdata = readdump(infile)
96 -- The hex-data is now in ascii-format,
97
98 -- But first, check the uid
99 local uid = string.sub(dumpdata,1,8)
100 output = output or (uid .. ".eml")
101
102 -- Format some linebreaks
103 dumpdata = convert_to_emulform(dumpdata)
104
105 local outfile = io.open(output, "w")
106 if outfile == nil then
107 return oops("Could not write to file ", output)
108 end
109
110 outfile:write(dumpdata:lower())
111 io.close(outfile)
112 print(("Wrote an emulator-dump to the file %s"):format(output))
113 end
114
115
116 --[[
117 In the future, we may implement so that scripts are invoked directly
118 into a 'main' function, instead of being executed blindly. For future
119 compatibility, I have done so, but I invoke my main from here.
120 --]]
121 main(args)
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