X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/7a23fca13a06266f169b7d739ef907d9ba9aebcb..2e16354693c5b0b2ea03a7824e6f9e527c0a66e9:/client/scripts/e.lua

diff --git a/client/scripts/e.lua b/client/scripts/e.lua
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+++ b/client/scripts/e.lua
@@ -0,0 +1,69 @@
+local getopt = require('getopt')
+local utils = require('utils')
+
+example = "script calculates many checksums (CRC) over the provided hex input"
+author = "Iceman"
+desc =
+[[
+This script calculates many checksums (CRS) over the provided hex input. 
+
+Arguments:
+	-b 				data in hex
+	-w				width of the CRC 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)
+
+	local data = '01020304'
+	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 = utils.ConvertHexToa end
+		if o == "w" then width = a end
+	end
+
+	print('Width of CRC: '..width..'  bytes: '..data)
+	print('')
+	print('Model','CRC', 'CRC_Reverse')
+	
+	local lists = core.reveng_models(width)
+	for _,i in pairs(lists) do
+		local one = core.reveng_runmodel(i, data, 0,0)
+		local two = core.reveng_runmodel(i, data, 1,0)
+		
+		print(i, one, two)
+	end
+	
+	if 1 == 1 then
+	 return
+	end 
+end
+
+main(args)
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