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[proxmark3-svn] / client / scripts / e.lua
1 local getopt = require('getopt')
2 local utils = require('utils')
3
4 example = "script calculates many different checksums (CRC) over the provided hex input"
5 author = "Iceman"
6 desc =
7 [[
8 This script calculates many checksums (CRC) over the provided hex input.
9
10 Arguments:
11 -b data in hex
12 -w bitwidth of the CRC family of algorithm. <optional> defaults to all known CRC presets.
13 Examples :
14 script run e -b 010203040506070809
15 script run e -b 010203040506070809 -w 16
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 return nil,err
30 end
31 ---
32 -- Usage help
33 function help()
34 print(desc)
35 print("Example usage")
36 print(example)
37 end
38 ---
39 -- The main entry point
40 function main(args)
41
42 local data
43 local width = 0
44
45 -- Read the parameters
46 for o, a in getopt.getopt(args, 'hb:w:') do
47 if o == "h" then return help() end
48 if o == "b" then data = a end
49 if o == "w" then width = a end
50 end
51
52 data = data or '01020304'
53
54 print( string.rep('-',60) )
55 print('Bit width of CRC | '..width)
56 print('Bytes | '..data)
57 print('')
58 print( ('%-20s| %-16s| %s'):format('Model','CRC', 'CRC reverse'))
59 print( string.rep('-',60) )
60 local lists = core.reveng_models(width)
61 for _,i in pairs(lists) do
62 local one = core.reveng_runmodel(i, data, false, '0')
63 local two = core.reveng_runmodel(i, data, true, '0')
64 print( ('%-20s| %-16s| %s'):format(i, one:upper(), two:upper()) )
65 end
66 end
67
68 main(args)
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