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

diff --git a/client/scripts/calc_mizip.lua b/client/scripts/calc_mizip.lua
new file mode 100644 (file)
index 0000000..8aa4f1c
--- /dev/null
+++ b/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)
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