REM: Remove a double pasted section of local variables.

[proxmark3-svn] / client / scripts / didump.lua

diff --git a/client/scripts/didump.lua b/client/scripts/didump.lua
index 2386d42d9e7c3c385bc912aee301ded73c762507..114d9ef484f04a5d7c098ba0f519064107bf2146 100644 (file)
--- a/client/scripts/didump.lua
+++ b/client/scripts/didump.lua
@@ -14,6 +14,7 @@ This is a script to dump and decrypt the data of a specific type of Mifare Mini
 
 Arguments:
        -h             : this help
+       -t                         : selftest
        -k <key>       : Mifare Key A.
 ]]
 
@@ -364,14 +365,22 @@ end
 local function selftest()
        local testdata = '000F42430D0A14000001D11F'..'5D738517'
        local chksum = getChecksum(testdata)
-       local calc = calculateChecksum( utils.ConvertHexToBytes(testdata:sub(1,24)))    
-       print  ('TESTDATA    :: '..testdata)
-       print  ('DATA        :: '..testdata:sub(1,24))
-       print (('CHKSUM      :: %X'):format(chksum))    
-       print (('CHKSUM CALC :: %X'):format(calc))      
-       print ('UPDATE CHKSUM :: '..updateChecksum(testdata))
-       
-       
+       local calc = calculateChecksum( utils.ConvertHexToBytes(testdata:sub(1,24)))
+       local isValid = false
+       local validStr = "FAIL"
+       if calc == chksum then
+               isValid = true
+               validStr = "OK"
+       end     
+       local newtestdata = updateChecksum(testdata)
+       local revalidated = "FAIL"
+       if newtestdata == testdata then
+               revalidated = "OK"
+       end     
+       print  ('TESTDATA      :: '..testdata)
+       print  ('DATA          :: '..testdata:sub(1,24))        
+       print (('VALID CHKSUM  :: %s'):format(validStr ))       
+       print (('UPDATE CHKSUM :: %s'):format(revalidated))     
 end
 --- 
 -- The main entry point
@@ -382,18 +391,15 @@ function main(args)
 
        local cmd, result, err, blockNo, keyA
        local blocks = {}
-       local decryptkey = ''
+       local magic = ''
        
        -- Read the parameters
-       for o, a in getopt.getopt(args, 'hk:') do
+       for o, a in getopt.getopt(args, 'hk:t') do
                if o == "h" then help() return end
                if o == "k" then keyA = a end
+               if o == "t" then return selftest() end
        end
        
-       selftest()
-       
-       local tst2 = '00100100030209094312356432324E34B79A349B'
-       
        -- validate input args.
        keyA =  keyA or '6dd747e86975'
        if #(keyA) ~= 12 then
@@ -410,15 +416,7 @@ function main(args)
        if not result then
                return oops(err)
        end
-
        core.clearCommandBuffer()
-
-       print(result.uid, keyA)
-
-       local my = result.uid
-       if 1 == 1 then 
-               return
-       end
        
        -- Show tag info
        print((' Found tag %s'):format(result.name))
@@ -426,11 +424,10 @@ function main(args)
        local longrandom = RANDOM..result.uid
        local res = utils.Sha1Hex(longrandom)
        res  = utils.ConvertBytesToHex(utils.ConvertAsciiToBytes(res:sub(1,16)))
-       decryptkey = utils.SwapEndiannessStr(res:sub(1,8) , 32)
-       decryptkey = decryptkey..utils.SwapEndiannessStr( res:sub(9,16),32)
-       decryptkey = decryptkey..utils.SwapEndiannessStr( res:sub(17,24),32)
-       decryptkey = decryptkey..utils.SwapEndiannessStr( res:sub(25,32),32)
-       print('Decrypt key::',decryptkey)
+       magic = utils.SwapEndiannessStr(res:sub(1,8) , 32)
+       magic = magic..utils.SwapEndiannessStr( res:sub(9,16),32)
+       magic = magic..utils.SwapEndiannessStr( res:sub(17,24),32)
+       magic = magic..utils.SwapEndiannessStr( res:sub(25,32),32)
        print('Reading card data')
        print('Raw','Decrypted')
        for blockNo = 0, numBlocks-1, 1 do
@@ -452,7 +449,7 @@ function main(args)
                        if string.find(blockdata, '^0+$') then
                                print(blockdata, blockdata)
                        else
-                               local aes = core.aes128_decrypt_ecb(decryptkey, blockdata)
+                               local aes = core.aes128_decrypt_ecb(magic, blockdata)
                                local bytes =  utils.ConvertAsciiToBytes(aes)
                                local hex = utils.ConvertBytesToHex(bytes)
                                print(blockdata , hex)
@@ -465,9 +462,6 @@ function main(args)
                        print(sectortrailer, sectortrailer, blockdata:sub(13,20))
                end
        end
-       -- checksum fyra sista bytes i varje rad.  (kanske inte för s0)
-       -- s0b1,s1b0,s2b0,s3b0
-       -- 
 end
 
 main(args)