From a2d82b467aa9c512fd7b3992662666bf42e87518 Mon Sep 17 00:00:00 2001
From: "martin.holst@gmail.com"
 <martin.holst@gmail.com@ef4ab9da-24cd-11de-8aaa-f3a34680c41f>
Date: Fri, 7 Jun 2013 13:23:32 +0000
Subject: [PATCH] Added library to read card info, made use of it from within
 mfkeys.lua script

---
 client/read14a.lua        | 100 ++++++++++++++++++++++++++++++++++++++
 client/scripts/mfkeys.lua |  11 +++++
 2 files changed, 111 insertions(+)
 create mode 100644 client/read14a.lua

diff --git a/client/read14a.lua b/client/read14a.lua
new file mode 100644
index 00000000..e9f9851f
--- /dev/null
+++ b/client/read14a.lua
@@ -0,0 +1,100 @@
+--[[
+	This is a library to read 14443a tags. It can be used something like this
+
+	local reader = require('read14a')
+	result, err = reader.read1443a()
+	if not result then
+		print(err)
+		return
+	end
+	print(result.name)
+
+--]]
+-- Loads the commands-library
+local cmds = require('commands')
+local TIMEOUT = 2000 -- Shouldn't take longer than 2 seconds
+local ISO14A_COMMAND = {
+	ISO14A_CONNECT = 1,
+	ISO14A_NO_DISCONNECT = 2,
+	ISO14A_APDU = 4,
+	ISO14A_RAW = 8,
+	ISO14A_REQUEST_TRIGGER = 0x10,
+	ISO14A_APPEND_CRC = 0x20,
+	ISO14A_SET_TIMEOUT = 0x40
+}
+
+local ISO14443a_TYPES = {}		
+ISO14443a_TYPES[0x00] = "NXP MIFARE Ultralight | Ultralight C"
+ISO14443a_TYPES[0x04] = "NXP MIFARE (various !DESFire !DESFire EV1)"
+ISO14443a_TYPES[0x08] = "NXP MIFARE CLASSIC 1k | Plus 2k"
+ISO14443a_TYPES[0x09] = "NXP MIFARE Mini 0.3k"
+ISO14443a_TYPES[0x10] = "NXP MIFARE Plus 2k"
+ISO14443a_TYPES[0x11] = "NXP MIFARE Plus 4k"
+ISO14443a_TYPES[0x18] = "NXP MIFARE Classic 4k | Plus 4k"
+ISO14443a_TYPES[0x20] = "NXP MIFARE DESFire 4k | DESFire EV1 2k/4k/8k | Plus 2k/4k | JCOP 31/41"
+ISO14443a_TYPES[0x24] = "NXP MIFARE DESFire | DESFire EV1"
+ISO14443a_TYPES[0x28] = "JCOP31 or JCOP41 v2.3.1"
+ISO14443a_TYPES[0x38] = "Nokia 6212 or 6131 MIFARE CLASSIC 4K"
+ISO14443a_TYPES[0x88] = "Infineon MIFARE CLASSIC 1K"
+ISO14443a_TYPES[0x98] = "Gemplus MPCOS"
+
+
+local function tostring_1443a(sak)
+	return ISO14443a_TYPES[sak] or ("Unknown (SAK=%x)"):format(sak)
+end
+
+local function parse1443a(data)
+	--[[
+
+	Based on this struct : 
+
+	typedef struct {
+		byte_t uid[10];
+		byte_t uidlen;
+		byte_t atqa[2];
+		byte_t sak;
+		byte_t ats_len;
+		byte_t ats[256];
+	} __attribute__((__packed__)) iso14a_card_select_t;
+
+	--]]
+
+	local count,uid,uidlen, atqa, sak, ats_len, ats= bin.unpack('H10CH2CC',data)
+	uid = uid:sub(1,2*uidlen)
+	--print("uid, atqa, sak: ",uid, atqa, sak)
+	--print("TYPE: ", tostring_1443a(sak))
+	return { uid = uid, atqa  = atqa, sak = sak, name = tostring_1443a(sak)}
+end
+
+local library = {
+	read1443a = function(blockNo, keys, keyType)
+		local command, result, info, err, data
+
+		core.clearCommandBuffer()
+		command = Command:new{cmd = cmds.CMD_READER_ISO_14443a, 
+									arg1 = ISO14A_COMMAND.ISO14A_CONNECT}
+
+		core.SendCommand(command:getBytes())
+		local result = core.WaitForResponseTimeout(cmds.CMD_ACK,TIMEOUT)
+		if result then
+			local count,cmd,arg0,arg1,arg2 = bin.unpack('LLLL',result)
+			if arg0 == 0 then 
+				print("iso14443a card select failed");
+				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
+
+}
+
+return library
\ No newline at end of file
diff --git a/client/scripts/mfkeys.lua b/client/scripts/mfkeys.lua
index 135108f3..f40b2be2 100644
--- a/client/scripts/mfkeys.lua
+++ b/client/scripts/mfkeys.lua
@@ -12,6 +12,9 @@
 local cmds = require('commands')
 -- Load the default keys
 local keys = require('mf_default_keys')
+-- Ability to read what card is there
+local reader = require('read14a')
+
 local desc = 
 ("This script implements check keys. It utilises a large list of default keys (currently %d keys).\
 If you want to add more, just put them inside mf_default_keys.lua. "):format(#keys)
@@ -103,6 +106,14 @@ local function main()
 
 	print(desc);
 
+	result, err = reader.read1443a()
+	if not result then
+		print(err)
+		return
+	end
+	print(("Found a %s tag"):format(result.name))
+
+
 	core.clearCommandBuffer()
 	local blockNo
 	local keyType = 0 -- A=0, B=1
-- 
2.39.5