cmdhf14b.c: fixing a crash in the crc computation when missing data (e.g. with 'hf...

[proxmark3-svn] / client / lualibs / read14a.lua

diff --git a/client/lualibs/read14a.lua b/client/lualibs/read14a.lua
index 72c985e98b7819190770b70c789b51a9de8942c5..cc3ba2ebcbdc65b7ff9a525479ec8c0bd1be48f4 100644 (file)
--- a/client/lualibs/read14a.lua
+++ b/client/lualibs/read14a.lua
@@ -87,37 +87,54 @@ local function sendToDevice(command, ignoreresponse)
        return response,nil
 end
 
-
-local library = {
-       -- This function does a connect. 
-       -- @param dont_disconnect - if true, does not disable the field
-       read1443a = function(dont_disconnect)
-
-               local command, result, info, err, data
-
-               command = Command:new{cmd = cmds.CMD_READER_ISO_14443a, 
-                                                                       arg1 = ISO14A_COMMAND.ISO14A_CONNECT}
-               if dont_disconnect then
-                       command.arg1 = command.arg1 + ISO14A_COMMAND.ISO14A_NO_DISCONNECT
-               end
-               local result,err = sendToDevice(command)
-               if result then
-                       local count,cmd,arg0,arg1,arg2 = bin.unpack('LLLL',result)
-                       if arg0 == 0 then 
-                               return nil, "iso14443a card select failed"
-                       end
-                       data = string.sub(result,count)
-                       info, err = parse1443a(data)
-               else
-                       err ="No response from card"
+-- This function does a connect and retrieves som einfo
+-- @param dont_disconnect - if true, does not disable the field
+-- @return if successfull: an table containing card info
+-- @return if unsuccessfull : nil, error
+local function read14443a(dont_disconnect)
+       local command, result, info, err, data
+
+       command = Command:new{cmd = cmds.CMD_READER_ISO_14443a, 
+                                                               arg1 = ISO14A_COMMAND.ISO14A_CONNECT}
+       if dont_disconnect then
+               command.arg1 = command.arg1 + ISO14A_COMMAND.ISO14A_NO_DISCONNECT
+       end
+       local result,err = sendToDevice(command)
+       if result then
+               local count,cmd,arg0,arg1,arg2 = bin.unpack('LLLL',result)
+               if arg0 == 0 then 
+                       return nil, "iso14443a card select failed"
                end
+               data = string.sub(result,count)
+               info, err = parse1443a(data)
+       else
+               err ="No response from card"
+       end
 
-               if err then 
-                       print(err) 
-                       return nil, err
-               end
-               return info
-       end,
+       if err then 
+               print(err) 
+               return nil, err
+       end
+       return info
+end
+
+---
+-- Waits for a mifare card to be placed within the vicinity of the reader. 
+-- @return if successfull: an table containing card info
+-- @return if unsuccessfull : nil, error
+local function waitFor14443a()
+       print("Waiting for card... press any key to quit")
+       while not core.ukbhit() do
+               res, err = read14443a()
+               if res then return res end
+               -- err means that there was no response from card
+       end
+       return nil, "Aborted by user"
+end
+local library = {
+       
+       read1443a = read14443a,
+       waitFor14443a = waitFor14443a,
        parse1443a = parse1443a,
        sendToDevice = sendToDevice,
        ISO14A_COMMAND = ISO14A_COMMAND,