proxmark3/client/scripts/e.lua

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local getopt = require('getopt')
local utils = require('utils')
example = "script calculates many different checksums (CRC) over the provided hex input"
author = "Iceman"
desc =
[[
This script calculates many checksums (CRC) over the provided hex input.
Arguments:
-b data in hex
-w bitwidth of the CRC family of algorithm. <optional> defaults to all known CRC presets.
Examples :
script run e -b 010203040506070809
script run e -b 010203040506070809 -w 16
]]
---
-- 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)
return nil,err
end
---
-- Usage help
function help()
print(desc)
print("Example usage")
print(example)
end
---
-- The main entry point
function main(args)
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local data
local width = 0
-- Read the parameters
for o, a in getopt.getopt(args, 'hb:w:') do
if o == "h" then return help() end
if o == "b" then data = a end
if o == "w" then width = a end
end
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data = data or '01020304'
print( string.rep('-',60) )
print('Bit width of CRC | '..width)
print('Bytes | '..data)
print('')
print( ('%-20s| %-16s| %s'):format('Model','CRC', 'CRC reverse'))
print( string.rep('-',60) )
local lists = core.reveng_models(width)
for _,i in pairs(lists) do
local a1 = core.reveng_runmodel(i, data, false, '0')
local a2 = core.reveng_runmodel(i, data, true, '0')
local a3 = core.reveng_runmodel(i, data, false, 'b')
local a4 = core.reveng_runmodel(i, data, false, 'B')
local a5 = core.reveng_runmodel(i, data, false, 'l')
local a6 = core.reveng_runmodel(i, data, false, 'L')
print( ('%-20s| %-16s| %-16s| %-16s| %-16s| %-16s| %-16s'):format(i, a1:upper(), a2:upper(),a3:upper(),a4:upper(),a5:upper(),a6:upper() ) )
end
end
main(args)