ADD: added a lua script which calculates mifare keys based on a uid diversification

client/scripts/calc_mizip.lua

@@ -0,0 +1,123 @@
+local bin = require('bin')
+local getopt = require('getopt')
+local utils =  require('utils')
+
+local bxor=bit32.bxor
+
+example =[[
+	 script run calc_mizip
+	 script run calc_mizip -u 11223344
+]]
+author = "Iceman"
+usage = "script run calc_mizip -u <uid>"
+desc =[[
+This script calculates mifare keys based on uid diversification for mizip. 
+Algo not found by me.
+Arguments:
+	-h             : this help
+	-u <UID>       : UID
+]]
+--- 
+-- A debug printout-function
+function dbg(args)
+    if type(args) == "table" then
+		local i = 1
+		while args[i] do
+			dbg(args[i])
+			i = i+1
+		end
+	else
+		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
+--
+-- Exit message
+function exitMsg(msg)
+	print( string.rep('--',20) )
+	print( string.rep('--',20) )
+	print(msg)
+	print()
+end
+
+local _xortable = {
+    --[[ sector key A/B, 6byte xor
+    --]]
+	{"001","09125a2589e5","F12C8453D821"},
+	{"002","AB75C937922F","73E799FE3241"},
+	{"003","E27241AF2C09","AA4D137656AE"},
+	{"004","317AB72F4490","B01327272DFD"},
+}
+local function printRow(sector, keyA, keyB)
+	print('|'..sector..'|  '..keyA..'  |  '..keyB..'  |' )
+end
+local function keyStr(p1, p2, p3, p4, p5, p6)
+	return string.format('%02X%02X%02X%02X%02X%02X',p1, p2, p3, p4, p5, p6)
+end
+local function calckey(uid, xorkey, keytype)
+	local p1,p2,p3,p4,p5,p6
+	if keytype == 'A' then 
+		p1 = bxor( uid[1], xorkey[1])
+		p2 = bxor( uid[2], xorkey[2])
+		p3 = bxor( uid[3], xorkey[3])
+		p4 = bxor( uid[4], xorkey[4])
+		p5 = bxor( uid[1], xorkey[5])
+		p6 = bxor( uid[2], xorkey[6])
+	else
+		p1 = bxor( uid[3], xorkey[1])
+		p2 = bxor( uid[4], xorkey[2])
+		p3 = bxor( uid[1], xorkey[3])
+		p4 = bxor( uid[2], xorkey[4])
+		p5 = bxor( uid[3], xorkey[5])
+		p6 = bxor( uid[4], xorkey[6])
+	end
+	return keyStr(p1,p2,p3,p4,p5,p6)
+end 
+local function main(args)
+
+	print( string.rep('==', 30) )
+	print()
+			
+	local i,j, pwd
+	local uid = '11223344'
+	
+	-- Arguments for the script
+	for o, a in getopt.getopt(args, 'hu:') do
+		if o == "h" then return help() end		
+		if o == "u" then uid = a end		
+	end
+
+	-- uid string checks
+	if uid == nil then return oops('empty uid string') end
+	if #uid == 0 then return oops('empty uid string') end
+	if #uid ~= 8 then return oops('uid wrong length. Should be 4 hex bytes') end
+
+	local uidbytes = utils.ConvertHexToBytes(uid)
+
+	print('|UID|', uid)
+	print('|---|----------------|----------------|')
+	print('|sec|key A           |key B           |')
+	print('|---|----------------|----------------|')
+	printRow('000', keyStr(0xA0,0xA1,0xA2,0xA3,0xA4,0xA5), keyStr(0xB4,0xC1,0x32,0x43,0x9e,0xef) )
+
+    for k, v in pairs(_xortable) do
+		local keyA = calckey(uidbytes, utils.ConvertHexToBytes(v[2]), 'A')
+		local keyB = calckey(uidbytes, utils.ConvertHexToBytes(v[3]), 'B')
+		printRow(v[1], keyA, keyB  )
+	end
+	print('|---|----------------|----------------|')	
+end
+
+main(args)