[proxmark3-svn] / armsrc / mifarecmd.c

//-----------------------------------------------------------------------------\r
// Merlok - June 2011, 2012\r
// Gerhard de Koning Gans - May 2008\r
// Hagen Fritsch - June 2010\r
// Midnitesnake - Dec 2013\r
// Andy Davies  - Apr 2014\r
// Iceman - May 2014,2015,2016\r
//\r
// This code is licensed to you under the terms of the GNU GPL, version 2 or,\r
// at your option, any later version. See the LICENSE.txt file for the text of\r
// the license.\r
//-----------------------------------------------------------------------------\r
// Routines to support ISO 14443 type A.\r
//-----------------------------------------------------------------------------\r
\r
#include "mifarecmd.h"\r
#include "apps.h"\r
#include "util.h"\r
#include "crc.h"\r
#include "protocols.h"\r
#include "parity.h"\r
\r
//-----------------------------------------------------------------------------\r
// Select, Authenticate, Read a MIFARE tag. \r
// read block\r
//-----------------------------------------------------------------------------\r
void MifareReadBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)\r
{\r
  // params\r
	uint8_t blockNo = arg0;\r
	uint8_t keyType = arg1;\r
	uint64_t ui64Key = 0;\r
	ui64Key = bytes_to_num(datain, 6);\r
	\r
	// variables\r
	byte_t isOK = 0;\r
	byte_t dataoutbuf[16] = {0x00};\r
	uint8_t uid[10] = {0x00};\r
	uint32_t cuid = 0;\r
	struct Crypto1State mpcs = {0, 0};\r
	struct Crypto1State *pcs;\r
	pcs = &mpcs;\r
\r
	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);\r
\r
	clear_trace();\r
	set_tracing(true);\r
\r
	LED_A_ON();\r
	LED_B_OFF();\r
	LED_C_OFF();\r
\r
	while (true) {\r
		if(!iso14443a_select_card(uid, NULL, &cuid, true, 0)) {\r
			if (MF_DBGLEVEL >= 1)	Dbprintf("Can't select card");\r
			break;\r
		};\r
\r
		if(mifare_classic_auth(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) {\r
			if (MF_DBGLEVEL >= 1)	Dbprintf("Auth error");\r
			break;\r
		};\r
		\r
		if(mifare_classic_readblock(pcs, cuid, blockNo, dataoutbuf)) {\r
			if (MF_DBGLEVEL >= 1)	Dbprintf("Read block error");\r
			break;\r
		};\r
\r
		if(mifare_classic_halt(pcs, cuid)) {\r
			if (MF_DBGLEVEL >= 1)	Dbprintf("Halt error");\r
			break;\r
		};\r
		\r
		isOK = 1;\r
		break;\r
	}\r
	\r
	crypto1_destroy(pcs);\r
	\r
	if (MF_DBGLEVEL >= 2)	DbpString("READ BLOCK FINISHED");\r
\r
	LED_B_ON();\r
	cmd_send(CMD_ACK,isOK,0,0,dataoutbuf,16);\r
	LED_B_OFF();\r
\r
	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);\r
	LEDsoff();\r
}\r
\r
void MifareUC_Auth(uint8_t arg0, uint8_t *keybytes){\r
\r
	bool turnOffField = (arg0 == 1);\r
\r
	LED_A_ON(); LED_B_OFF(); LED_C_OFF();\r
\r
	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);\r
\r
	clear_trace();\r
	set_tracing(true);\r
\r
	if(!iso14443a_select_card(NULL, NULL, NULL, true, 0)) {\r
		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Can't select card");\r
		OnError(0);\r
		return;\r
	};\r
	\r
	if(!mifare_ultra_auth(keybytes)){\r
		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Authentication failed");\r
		OnError(1);\r
		return;\r
	}\r
\r
	if (turnOffField) {\r
		FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);\r
		LEDsoff();\r
	}\r
	cmd_send(CMD_ACK,1,0,0,0,0);\r
}\r
\r
// Arg0 = BlockNo,\r
// Arg1 = UsePwd bool\r
// datain = PWD bytes,\r
void MifareUReadBlock(uint8_t arg0, uint8_t arg1, uint8_t *datain)\r
{\r
	uint8_t blockNo = arg0;\r
	byte_t dataout[16] = {0x00};\r
	bool useKey = (arg1 == 1); //UL_C\r
	bool usePwd = (arg1 == 2); //UL_EV1/NTAG\r
\r
	LEDsoff();\r
	LED_A_ON();\r
	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);\r
\r
	clear_trace();\r
	set_tracing(true);\r
\r
	int len = iso14443a_select_card(NULL, NULL, NULL, true, 0);\r
	if(!len) {\r
		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Can't select card (RC:%02X)",len);\r
		OnError(1);\r
		return;\r
	}\r
\r
	// UL-C authentication\r
	if ( useKey ) {\r
		uint8_t key[16] = {0x00};\r
		memcpy(key, datain, sizeof(key) );\r
\r
		if ( !mifare_ultra_auth(key) ) {\r
			OnError(1);\r
			return;\r
		}\r
	}\r
\r
	// UL-EV1 / NTAG authentication\r
	if ( usePwd ) {\r
		uint8_t pwd[4] = {0x00};\r
		memcpy(pwd, datain, 4);\r
		uint8_t pack[4] = {0,0,0,0};\r
		if (!mifare_ul_ev1_auth(pwd, pack)) {\r
			OnError(1);\r
			return;\r
		}\r
	}	\r
\r
	if( mifare_ultra_readblock(blockNo, dataout) ) {\r
		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Read block error");\r
		OnError(2);\r
		return;\r
	}\r
\r
	if( mifare_ultra_halt() ) {\r
		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Halt error");\r
		OnError(3);\r
		return;\r
	}\r
\r
    cmd_send(CMD_ACK,1,0,0,dataout,16);\r
	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);\r
	LEDsoff();\r
}\r
\r
//-----------------------------------------------------------------------------\r
// Select, Authenticate, Read a MIFARE tag. \r
// read sector (data = 4 x 16 bytes = 64 bytes, or 16 x 16 bytes = 256 bytes)\r
//-----------------------------------------------------------------------------\r
void MifareReadSector(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)\r
{\r
  // params\r
	uint8_t sectorNo = arg0;\r
	uint8_t keyType = arg1;\r
	uint64_t ui64Key = 0;\r
	ui64Key = bytes_to_num(datain, 6);\r
	\r
	// variables\r
	byte_t isOK = 0;\r
	byte_t dataoutbuf[16 * 16];\r
	uint8_t uid[10] = {0x00};\r
	uint32_t cuid = 0;\r
	struct Crypto1State mpcs = {0, 0};\r
	struct Crypto1State *pcs;\r
	pcs = &mpcs;\r
\r
	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);\r
\r
	clear_trace();\r
	set_tracing(true);\r
	\r
	LED_A_ON();\r
	LED_B_OFF();\r
	LED_C_OFF();\r
\r
	isOK = 1;\r
	if(!iso14443a_select_card(uid, NULL, &cuid, true, 0)) {\r
		isOK = 0;\r
		if (MF_DBGLEVEL >= 1)	Dbprintf("Can't select card");\r
	}\r
	\r
	\r
	if(isOK && mifare_classic_auth(pcs, cuid, FirstBlockOfSector(sectorNo), keyType, ui64Key, AUTH_FIRST)) {\r
		isOK = 0;\r
		if (MF_DBGLEVEL >= 1)	Dbprintf("Auth error");\r
	}\r
	\r
	for (uint8_t blockNo = 0; isOK && blockNo < NumBlocksPerSector(sectorNo); blockNo++) {\r
		if(mifare_classic_readblock(pcs, cuid, FirstBlockOfSector(sectorNo) + blockNo, dataoutbuf + 16 * blockNo)) {\r
			isOK = 0;\r
			if (MF_DBGLEVEL >= 1)	Dbprintf("Read sector %2d block %2d error", sectorNo, blockNo);\r
			break;\r
		}\r
	}\r
		\r
	if(mifare_classic_halt(pcs, cuid)) {\r
		if (MF_DBGLEVEL >= 1)	Dbprintf("Halt error");\r
	}\r
\r
	if (MF_DBGLEVEL >= 2) DbpString("READ SECTOR FINISHED");\r
\r
	crypto1_destroy(pcs);\r
\r
	LED_B_ON();\r
	cmd_send(CMD_ACK,isOK,0,0,dataoutbuf,16*NumBlocksPerSector(sectorNo));\r
	LED_B_OFF();\r
\r
	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);\r
	LEDsoff();\r
	set_tracing(FALSE);\r
}\r
\r
// arg0 = blockNo (start)\r
// arg1 = Pages (number of blocks)\r
// arg2 = useKey\r
// datain = KEY bytes\r
void MifareUReadCard(uint8_t arg0, uint16_t arg1, uint8_t arg2, uint8_t *datain)\r
{\r
	LEDsoff();\r
	LED_A_ON();\r
	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);\r
\r
	// free eventually allocated BigBuf memory\r
	BigBuf_free(); BigBuf_Clear_ext(false);\r
	clear_trace();\r
	set_tracing(true);\r
	\r
	// params\r
	uint8_t blockNo = arg0;\r
	uint16_t blocks = arg1;\r
	bool useKey = (arg2 == 1); //UL_C\r
	bool usePwd = (arg2 == 2); //UL_EV1/NTAG\r
	uint32_t countblocks = 0;\r
	uint8_t *dataout = BigBuf_malloc(CARD_MEMORY_SIZE);\r
	if (dataout == NULL){\r
		Dbprintf("out of memory");\r
		OnError(1);\r
		return;\r
	}\r
\r
	int len = iso14443a_select_card(NULL, NULL, NULL, true, 0);\r
	if (!len) {\r
		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Can't select card (RC:%d)",len);\r
		OnError(1);\r
		return;\r
	}\r
\r
	// UL-C authentication\r
	if ( useKey ) {\r
		uint8_t key[16] = {0x00};\r
		memcpy(key, datain, sizeof(key) );\r
\r
		if ( !mifare_ultra_auth(key) ) {\r
			OnError(1);\r
			return;\r
		}\r
	}\r
\r
	// UL-EV1 / NTAG authentication\r
	if (usePwd) {\r
		uint8_t pwd[4] = {0x00};\r
		memcpy(pwd, datain, sizeof(pwd));\r
		uint8_t pack[4] = {0,0,0,0};\r
\r
		if (!mifare_ul_ev1_auth(pwd, pack)){\r
			OnError(1);\r
			return;			\r
		}\r
	}\r
\r
	for (int i = 0; i < blocks; i++){\r
		if ((i*4) + 4 >= CARD_MEMORY_SIZE) {\r
			Dbprintf("Data exceeds buffer!!");\r
			break;\r
		}\r
\r
		len = mifare_ultra_readblock(blockNo + i, dataout + 4 * i);\r
		\r
		if (len) {\r
			if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Read block %d error",i);\r
			// if no blocks read - error out\r
			if (i==0){\r
				OnError(2);\r
			return;\r
			} else {\r
				//stop at last successful read block and return what we got\r
				break;\r
			}\r
		} else {\r
			countblocks++;\r
		}\r
	}\r
\r
	len = mifare_ultra_halt();\r
	if (len) {\r
		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Halt error");\r
		OnError(3);\r
		return;\r
	}\r
\r
	if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("Blocks read %d", countblocks);\r
\r
	countblocks *= 4;\r
\r
	cmd_send(CMD_ACK, 1, countblocks, BigBuf_max_traceLen(), 0, 0);\r
	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);\r
	LEDsoff();\r
	BigBuf_free();\r
	set_tracing(FALSE);\r
}\r
\r
//-----------------------------------------------------------------------------\r
// Select, Authenticate, Write a MIFARE tag. \r
// read block\r
//-----------------------------------------------------------------------------\r
void MifareWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)\r
{\r
	// params\r
	uint8_t blockNo = arg0;\r
	uint8_t keyType = arg1;\r
	uint64_t ui64Key = 0;\r
	byte_t blockdata[16] = {0x00};\r
\r
	ui64Key = bytes_to_num(datain, 6);\r
	memcpy(blockdata, datain + 10, 16);\r
	\r
	// variables\r
	byte_t isOK = 0;\r
	uint8_t uid[10] = {0x00};\r
	uint32_t cuid = 0;\r
	struct Crypto1State mpcs = {0, 0};\r
	struct Crypto1State *pcs;\r
	pcs = &mpcs;\r
\r
	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);\r
\r
	clear_trace();\r
	set_tracing(true);\r
	\r
	LED_A_ON();\r
	LED_B_OFF();\r
	LED_C_OFF();\r
\r
	while (true) {\r
			if(!iso14443a_select_card(uid, NULL, &cuid, true, 0)) {\r
			if (MF_DBGLEVEL >= 1)	Dbprintf("Can't select card");\r
			break;\r
		};\r
\r
		if(mifare_classic_auth(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) {\r
			if (MF_DBGLEVEL >= 1)	Dbprintf("Auth error");\r
			break;\r
		};\r
		\r
		if(mifare_classic_writeblock(pcs, cuid, blockNo, blockdata)) {\r
			if (MF_DBGLEVEL >= 1)	Dbprintf("Write block error");\r
			break;\r
		};\r
\r
		if(mifare_classic_halt(pcs, cuid)) {\r
			if (MF_DBGLEVEL >= 1)	Dbprintf("Halt error");\r
			break;\r
		};\r
		\r
		isOK = 1;\r
		break;\r
	}\r
	\r
	//  ----------------------------- crypto1 destroy\r
	crypto1_destroy(pcs);\r
	\r
	if (MF_DBGLEVEL >= 2)	DbpString("WRITE BLOCK FINISHED");\r
\r
	LED_B_ON();\r
	cmd_send(CMD_ACK,isOK,0,0,0,0);\r
	LED_B_OFF();\r
\r
	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);\r
	LEDsoff();\r
	set_tracing(FALSE);\r
}\r
\r
/* // Command not needed but left for future testing \r
void MifareUWriteBlockCompat(uint8_t arg0, uint8_t *datain)\r
{\r
	uint8_t blockNo = arg0;\r
	byte_t blockdata[16] = {0x00};\r
\r
	memcpy(blockdata, datain, 16);\r
\r
	uint8_t uid[10] = {0x00};\r
\r
	LED_A_ON(); LED_B_OFF(); LED_C_OFF();\r
\r
	clear_trace();\r
	set_tracing(true);\r
	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);\r
\r
	if(!iso14443a_select_card(uid, NULL, NULL, true, 0)) {\r
		if (MF_DBGLEVEL >= 1)   Dbprintf("Can't select card");\r
		OnError(0);\r
		return;\r
	};\r
\r
	if(mifare_ultra_writeblock_compat(blockNo, blockdata)) {\r
		if (MF_DBGLEVEL >= 1)   Dbprintf("Write block error");\r
		OnError(0);\r
		return;	};\r
\r
	if(mifare_ultra_halt()) {\r
		if (MF_DBGLEVEL >= 1)   Dbprintf("Halt error");\r
		OnError(0);\r
		return;\r
	};\r
\r
	if (MF_DBGLEVEL >= 2)   DbpString("WRITE BLOCK FINISHED");\r
\r
	cmd_send(CMD_ACK,1,0,0,0,0);\r
	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);\r
	LEDsoff();\r
}\r
*/\r
\r
// Arg0   : Block to write to.\r
// Arg1   : 0 = use no authentication.\r
//          1 = use 0x1A authentication.\r
//          2 = use 0x1B authentication.\r
// datain : 4 first bytes is data to be written.\r
//        : 4/16 next bytes is authentication key.\r
void MifareUWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t *datain)\r
{\r
	uint8_t blockNo = arg0;\r
	bool useKey = (arg1 == 1); //UL_C\r
	bool usePwd = (arg1 == 2); //UL_EV1/NTAG\r
	byte_t blockdata[4] = {0x00};\r
\r
	memcpy(blockdata, datain,4);\r
	\r
	LEDsoff();\r
	LED_A_ON();\r
	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);\r
\r
	clear_trace();\r
	set_tracing(true);\r
	\r
	if(!iso14443a_select_card(NULL, NULL, NULL, true, 0)) {\r
		if (MF_DBGLEVEL >= 1) Dbprintf("Can't select card");\r
		OnError(0);\r
		return;\r
	};\r
\r
	// UL-C authentication\r
	if ( useKey ) {\r
		uint8_t key[16] = {0x00};	\r
		memcpy(key, datain+4, sizeof(key) );\r
\r
		if ( !mifare_ultra_auth(key) ) {\r
			OnError(1);\r
			return;			\r
		}\r
	}\r
	\r
	// UL-EV1 / NTAG authentication\r
	if (usePwd) { \r
		uint8_t pwd[4] = {0x00};\r
		memcpy(pwd, datain+4, 4);\r
		uint8_t pack[4] = {0,0,0,0};\r
		if (!mifare_ul_ev1_auth(pwd, pack)) {\r
			OnError(1);\r
			return;			\r
		}\r
	}\r
	\r
	if(mifare_ultra_writeblock(blockNo, blockdata)) {\r
		if (MF_DBGLEVEL >= 1) Dbprintf("Write block error");\r
		OnError(0);\r
		return;\r
	};\r
\r
	if(mifare_ultra_halt()) {\r
		if (MF_DBGLEVEL >= 1) Dbprintf("Halt error");\r
		OnError(0);\r
		return;\r
	};\r
\r
	if (MF_DBGLEVEL >= 2) DbpString("WRITE BLOCK FINISHED");\r
\r
	cmd_send(CMD_ACK,1,0,0,0,0);\r
	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);\r
	LEDsoff();\r
	set_tracing(FALSE);\r
}\r
\r
void MifareUSetPwd(uint8_t arg0, uint8_t *datain){\r
	\r
	uint8_t pwd[16] = {0x00};\r
	byte_t blockdata[4] = {0x00};\r
	\r
	memcpy(pwd, datain, 16);\r
	\r
	LED_A_ON(); LED_B_OFF(); LED_C_OFF();\r
	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);\r
\r
	clear_trace();\r
	set_tracing(true);\r
	\r
	if(!iso14443a_select_card(NULL, NULL, NULL, true, 0)) {\r
		if (MF_DBGLEVEL >= 1) Dbprintf("Can't select card");\r
		OnError(0);\r
		return;\r
	};\r
\r
	blockdata[0] = pwd[7];\r
	blockdata[1] = pwd[6];\r
	blockdata[2] = pwd[5];\r
	blockdata[3] = pwd[4];\r
	if(mifare_ultra_writeblock( 44, blockdata)) {\r
		if (MF_DBGLEVEL >= 1) Dbprintf("Write block error");\r
		OnError(44);\r
		return;\r
	};\r
\r
	blockdata[0] = pwd[3];\r
	blockdata[1] = pwd[2];\r
	blockdata[2] = pwd[1];\r
	blockdata[3] = pwd[0];\r
	if(mifare_ultra_writeblock( 45, blockdata)) {\r
		if (MF_DBGLEVEL >= 1) Dbprintf("Write block error");\r
		OnError(45);\r
		return;\r
	};\r
\r
	blockdata[0] = pwd[15];\r
	blockdata[1] = pwd[14];\r
	blockdata[2] = pwd[13];\r
	blockdata[3] = pwd[12];\r
	if(mifare_ultra_writeblock( 46, blockdata)) {\r
		if (MF_DBGLEVEL >= 1) Dbprintf("Write block error");\r
		OnError(46);\r
		return;\r
	};\r
\r
	blockdata[0] = pwd[11];\r
	blockdata[1] = pwd[10];\r
	blockdata[2] = pwd[9];\r
	blockdata[3] = pwd[8];\r
	if(mifare_ultra_writeblock( 47, blockdata)) {\r
		if (MF_DBGLEVEL >= 1) Dbprintf("Write block error");\r
		OnError(47);\r
		return;\r
	};	\r
\r
	if(mifare_ultra_halt()) {\r
		if (MF_DBGLEVEL >= 1) Dbprintf("Halt error");\r
		OnError(0);\r
		return;\r
	};\r
\r
	cmd_send(CMD_ACK,1,0,0,0,0);\r
	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);\r
	LEDsoff();\r
	set_tracing(FALSE);\r
}\r
\r
// Return 1 if the nonce is invalid else return 0\r
int valid_nonce(uint32_t Nt, uint32_t NtEnc, uint32_t Ks1, uint8_t *parity) {\r
	return ((oddparity8((Nt >> 24) & 0xFF) == ((parity[0]) ^ oddparity8((NtEnc >> 24) & 0xFF) ^ BIT(Ks1,16))) & \\r
	(oddparity8((Nt >> 16) & 0xFF) == ((parity[1]) ^ oddparity8((NtEnc >> 16) & 0xFF) ^ BIT(Ks1,8))) & \\r
	(oddparity8((Nt >> 8) & 0xFF) == ((parity[2]) ^ oddparity8((NtEnc >> 8) & 0xFF) ^ BIT(Ks1,0)))) ? 1 : 0;\r
}\r
\r
\r
//-----------------------------------------------------------------------------\r
// acquire encrypted nonces in order to perform the attack described in\r
// Carlo Meijer, Roel Verdult, "Ciphertext-only Cryptanalysis on Hardened\r
// Mifare Classic Cards" in Proceedings of the 22nd ACM SIGSAC Conference on \r
// Computer and Communications Security, 2015\r
//-----------------------------------------------------------------------------\r
#define AUTHENTICATION_TIMEOUT 848			// card times out 1ms after wrong authentication (according to NXP documentation)\r
#define PRE_AUTHENTICATION_LEADTIME 400		// some (non standard) cards need a pause after select before they are ready for first authentication \r
\r
void MifareAcquireEncryptedNonces(uint32_t arg0, uint32_t arg1, uint32_t flags, uint8_t *datain)\r
{\r
	uint64_t ui64Key = 0;\r
	uint8_t uid[10] = {0x00};\r
	uint32_t cuid = 0;\r
	uint8_t cascade_levels = 0;\r
	struct Crypto1State mpcs = {0, 0};\r
	struct Crypto1State *pcs;\r
	pcs = &mpcs;\r
	uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE] = {0x00};\r
	int16_t isOK = 0;\r
	uint8_t par_enc[1] = {0x00};\r
	uint8_t nt_par_enc = 0;\r
	uint8_t buf[USB_CMD_DATA_SIZE] = {0x00};\r
	uint32_t timeout = 0;\r
	\r
	uint8_t blockNo = arg0 & 0xff;\r
	uint8_t keyType = (arg0 >> 8) & 0xff;\r
	uint8_t targetBlockNo = arg1 & 0xff;\r
	uint8_t targetKeyType = (arg1 >> 8) & 0xff;\r
	ui64Key = bytes_to_num(datain, 6);\r
	bool initialize = flags & 0x0001;\r
	bool slow = flags & 0x0002;\r
	bool field_off = flags & 0x0004;\r
	\r
	LED_A_ON();\r
	LED_C_OFF();\r
\r
	if (initialize) {\r
		iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);\r
		clear_trace();\r
		set_tracing(true);\r
	}\r
	\r
	LED_C_ON();\r
	\r
	uint16_t num_nonces = 0;\r
	bool have_uid = false;\r
	for (uint16_t i = 0; i <= USB_CMD_DATA_SIZE - 9; ) {\r
\r
		// Test if the action was cancelled\r
		if(BUTTON_PRESS()) {\r
			isOK = 2;\r
			field_off = true;\r
			break;\r
		}\r
\r
		if (!have_uid) { // need a full select cycle to get the uid first\r
			iso14a_card_select_t card_info;		\r
			if(!iso14443a_select_card(uid, &card_info, &cuid, true, 0)) {\r
				if (MF_DBGLEVEL >= 1)	Dbprintf("AcquireNonces: Can't select card (ALL)");\r
				continue;\r
			}\r
			switch (card_info.uidlen) {\r
				case 4 : cascade_levels = 1; break;\r
				case 7 : cascade_levels = 2; break;\r
				case 10: cascade_levels = 3; break;\r
				default: break;\r
			}\r
			have_uid = true;	\r
		} else { // no need for anticollision. We can directly select the card\r
			if(!iso14443a_select_card(uid, NULL, NULL, false, cascade_levels)) {\r
				if (MF_DBGLEVEL >= 1)	Dbprintf("AcquireNonces: Can't select card (UID)");\r
				continue;\r
			}\r
		}\r
		\r
		if (slow) {\r
			timeout = GetCountSspClk() + PRE_AUTHENTICATION_LEADTIME;\r
			while(GetCountSspClk() < timeout);\r
		}\r
\r
		uint32_t nt1;\r
		if (mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST, &nt1, NULL)) {\r
			if (MF_DBGLEVEL >= 1)	Dbprintf("AcquireNonces: Auth1 error");\r
			continue;\r
		}\r
\r
		// nested authentication\r
		uint16_t len = mifare_sendcmd_short(pcs, AUTH_NESTED, 0x60 + (targetKeyType & 0x01), targetBlockNo, receivedAnswer, par_enc, NULL);\r
		if (len != 4) {\r
			if (MF_DBGLEVEL >= 1)	Dbprintf("AcquireNonces: Auth2 error len=%d", len);\r
			continue;\r
		}\r
	\r
		// send a dummy byte as reader response in order to trigger the cards authentication timeout\r
		uint8_t dummy_answer = 0;\r
		ReaderTransmit(&dummy_answer, 1, NULL);\r
		timeout = GetCountSspClk() + AUTHENTICATION_TIMEOUT;\r
		\r
		num_nonces++;\r
		if (num_nonces % 2) {\r
			memcpy(buf+i, receivedAnswer, 4);\r
			nt_par_enc = par_enc[0] & 0xf0;\r
		} else {\r
			nt_par_enc |= par_enc[0] >> 4;\r
			memcpy(buf+i+4, receivedAnswer, 4);\r
			memcpy(buf+i+8, &nt_par_enc, 1);\r
			i += 9;\r
		}\r
		// wait for the card to become ready again\r
		while(GetCountSspClk() < timeout);	\r
	}\r
\r
	LED_C_OFF();\r
	\r
	crypto1_destroy(pcs);\r
	\r
	LED_B_ON();\r
	cmd_send(CMD_ACK, isOK, cuid, num_nonces, buf, sizeof(buf));\r
	LED_B_OFF();\r
\r
	if (MF_DBGLEVEL >= 3)	DbpString("AcquireEncryptedNonces finished");\r
\r
	if (field_off) {\r
		FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);\r
		LEDsoff();\r
		set_tracing(FALSE);\r
	}\r
}\r
\r
\r
//-----------------------------------------------------------------------------\r
// MIFARE nested authentication. \r
// \r
//-----------------------------------------------------------------------------\r
void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *datain)\r
{\r
	// params\r
	uint8_t blockNo = arg0 & 0xff;\r
	uint8_t keyType = (arg0 >> 8) & 0xff;\r
	uint8_t targetBlockNo = arg1 & 0xff;\r
	uint8_t targetKeyType = (arg1 >> 8) & 0xff;\r
	uint64_t ui64Key = 0;\r
\r
	ui64Key = bytes_to_num(datain, 6);\r
	\r
	// variables\r
	uint16_t rtr, i, j, len;\r
	uint16_t davg = 0;\r
	static uint16_t dmin, dmax;\r
	uint8_t uid[10] = {0x00};\r
	uint32_t cuid = 0, nt1, nt2, nttmp, nttest, ks1;\r
	uint8_t par[1] = {0x00};\r
	uint32_t target_nt[2] = {0x00}, target_ks[2] = {0x00};\r
	\r
	uint8_t par_array[4] = {0x00};\r
	uint16_t ncount = 0;\r
	struct Crypto1State mpcs = {0, 0};\r
	struct Crypto1State *pcs;\r
	pcs = &mpcs;\r
	uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE] = {0x00};\r
\r
	uint32_t auth1_time, auth2_time;\r
	static uint16_t delta_time = 0;\r
\r
	LED_A_ON();\r
	LED_C_OFF();\r
	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);\r
\r
	// free eventually allocated BigBuf memory\r
	BigBuf_free(); BigBuf_Clear_ext(false);\r
	\r
	if (calibrate) clear_trace();\r
	set_tracing(true);\r
\r
	// statistics on nonce distance\r
	int16_t isOK = 0;\r
	#define NESTED_MAX_TRIES 12\r
	uint16_t unsuccessfull_tries = 0;\r
	if (calibrate) {	// for first call only. Otherwise reuse previous calibration\r
		LED_B_ON();\r
		WDT_HIT();\r
\r
		davg = dmax = 0;\r
		dmin = 2000;\r
		delta_time = 0;\r
		\r
		for (rtr = 0; rtr < 17; rtr++) {\r
\r
			// Test if the action was cancelled\r
			if(BUTTON_PRESS()) {\r
				isOK = -2;\r
				break;\r
			}\r
\r
			// prepare next select. No need to power down the card.\r
			if(mifare_classic_halt(pcs, cuid)) {\r
				if (MF_DBGLEVEL >= 1)	Dbprintf("Nested: Halt error");\r
				rtr--;\r
				continue;\r
			}\r
\r
			if(!iso14443a_select_card(uid, NULL, &cuid, true, 0)) {\r
				if (MF_DBGLEVEL >= 1)	Dbprintf("Nested: Can't select card");\r
				rtr--;\r
				continue;\r
			};\r
\r
			auth1_time = 0;\r
			if(mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST, &nt1, &auth1_time)) {\r
				if (MF_DBGLEVEL >= 1)	Dbprintf("Nested: Auth1 error");\r
				rtr--;\r
				continue;\r
			};\r
			auth2_time = (delta_time) ? auth1_time + delta_time : 0;\r
\r
			if(mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_NESTED, &nt2, &auth2_time)) {\r
				if (MF_DBGLEVEL >= 1)	Dbprintf("Nested: Auth2 error");\r
				rtr--;\r
				continue;\r
			};\r
\r
			nttmp = prng_successor(nt1, 100);				//NXP Mifare is typical around 840,but for some unlicensed/compatible mifare card this can be 160\r
			for (i = 101; i < 1200; i++) {\r
				nttmp = prng_successor(nttmp, 1);\r
				if (nttmp == nt2) break;\r
			}\r
\r
			if (i != 1200) {\r
				if (rtr != 0) {\r
					davg += i;\r
					dmin = MIN(dmin, i);\r
					dmax = MAX(dmax, i);\r
				}\r
				else {\r
					delta_time = auth2_time - auth1_time + 32;  // allow some slack for proper timing\r
				}\r
				if (MF_DBGLEVEL >= 3) Dbprintf("Nested: calibrating... ntdist=%d", i);\r
			} else {\r
				unsuccessfull_tries++;\r
				if (unsuccessfull_tries > NESTED_MAX_TRIES) {	// card isn't vulnerable to nested attack (random numbers are not predictable)\r
					isOK = -3;\r
				}\r
			}\r
		}\r
\r
		davg = (davg + (rtr - 1)/2) / (rtr - 1);\r
		\r
		if (MF_DBGLEVEL >= 3) Dbprintf("rtr=%d isOK=%d min=%d max=%d avg=%d, delta_time=%d", rtr, isOK, dmin, dmax, davg, delta_time);\r
\r
		dmin = davg - 2;\r
		dmax = davg + 2;\r
		\r
		LED_B_OFF();\r
	}\r
//  -------------------------------------------------------------------------------------------------	\r
	\r
	LED_C_ON();\r
\r
	//  get crypted nonces for target sector\r
	for(i=0; i < 2 && !isOK; i++) { // look for exactly two different nonces\r
\r
		target_nt[i] = 0;\r
		while(target_nt[i] == 0) { // continue until we have an unambiguous nonce\r
		\r
			// prepare next select. No need to power down the card.\r
			if(mifare_classic_halt(pcs, cuid)) {\r
				if (MF_DBGLEVEL >= 1)	Dbprintf("Nested: Halt error");\r
				continue;\r
			}\r
\r
			if(!iso14443a_select_card(uid, NULL, &cuid, true, 0)) {\r
				if (MF_DBGLEVEL >= 1)	Dbprintf("Nested: Can't select card");\r
				continue;\r
			};\r
		\r
			auth1_time = 0;\r
			if(mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST, &nt1, &auth1_time)) {\r
				if (MF_DBGLEVEL >= 1)	Dbprintf("Nested: Auth1 error");\r
				continue;\r
			};\r
\r
			// nested authentication\r
			auth2_time = auth1_time + delta_time;\r
\r
			len = mifare_sendcmd_short(pcs, AUTH_NESTED, 0x60 + (targetKeyType & 0x01), targetBlockNo, receivedAnswer, par, &auth2_time);\r
			if (len != 4) {\r
				if (MF_DBGLEVEL >= 1)	Dbprintf("Nested: Auth2 error len=%d", len);\r
				continue;\r
			};\r
		\r
			nt2 = bytes_to_num(receivedAnswer, 4);		\r
			if (MF_DBGLEVEL >= 3) Dbprintf("Nonce#%d: Testing nt1=%08x nt2enc=%08x nt2par=%02x", i+1, nt1, nt2, par[0]);\r
			\r
			// Parity validity check\r
//			for (j = 0; j < 4; j++) {\r
//				par_array[j] = (oddparity8(receivedAnswer[j]) != ((par[0] >> (7-j)) & 0x01));\r
//			}\r
			par_array[0] = (oddparity8(receivedAnswer[0]) != ((par[0] >> (7-0)) & 0x01));\r
			par_array[1] = (oddparity8(receivedAnswer[1]) != ((par[0] >> (7-1)) & 0x01));\r
			par_array[2] = (oddparity8(receivedAnswer[2]) != ((par[0] >> (7-2)) & 0x01));\r
			par_array[3] = (oddparity8(receivedAnswer[3]) != ((par[0] >> (7-3)) & 0x01));\r
			\r
			ncount = 0;\r
			nttest = prng_successor(nt1, dmin - 1);\r
			for (j = dmin; j < dmax + 1; j++) {\r
				nttest = prng_successor(nttest, 1);\r
				ks1 = nt2 ^ nttest;\r
\r
				if (valid_nonce(nttest, nt2, ks1, par_array)){\r
					if (ncount > 0) { 		// we are only interested in disambiguous nonces, try again\r
						if (MF_DBGLEVEL >= 3) Dbprintf("Nonce#%d: dismissed (ambigous), ntdist=%d", i+1, j);\r
						target_nt[i] = 0;\r
						break;\r
					}\r
					target_nt[i] = nttest;\r
					target_ks[i] = ks1;\r
					ncount++;\r
					if (i == 1 && target_nt[1] == target_nt[0]) { // we need two different nonces\r
						target_nt[i] = 0;\r
						if (MF_DBGLEVEL >= 3) Dbprintf("Nonce#2: dismissed (= nonce#1), ntdist=%d", j);\r
						break;\r
					}\r
					if (MF_DBGLEVEL >= 3) Dbprintf("Nonce#%d: valid, ntdist=%d", i+1, j);\r
				}\r
			}\r
			if (target_nt[i] == 0 && j == dmax+1 && MF_DBGLEVEL >= 3) Dbprintf("Nonce#%d: dismissed (all invalid)", i+1);\r
		}\r
	}\r
\r
	LED_C_OFF();\r
	\r
	crypto1_destroy(pcs);\r
	\r
	byte_t buf[4 + 4 * 4] = {0};\r
	memcpy(buf, &cuid, 4);\r
	memcpy(buf+4, &target_nt[0], 4);\r
	memcpy(buf+8, &target_ks[0], 4);\r
	memcpy(buf+12, &target_nt[1], 4);\r
	memcpy(buf+16, &target_ks[1], 4);\r
	\r
	LED_B_ON();\r
	cmd_send(CMD_ACK, isOK, 0, targetBlockNo + (targetKeyType * 0x100), buf, sizeof(buf));\r
	LED_B_OFF();\r
\r
	if (MF_DBGLEVEL >= 3)	DbpString("NESTED FINISHED");\r
\r
	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);\r
	LEDsoff();\r
	set_tracing(FALSE);\r
}\r
\r
//-----------------------------------------------------------------------------\r
// MIFARE check keys. key count up to 85. \r
// \r
//-----------------------------------------------------------------------------\r
void MifareChkKeys(uint16_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain) {\r
	uint8_t blockNo = arg0 & 0xff;\r
	uint8_t keyType = (arg0 >> 8) & 0xff;\r
	bool clearTrace = arg1;\r
	uint8_t keyCount = arg2;\r
	uint64_t ui64Key = 0;\r
	\r
	bool have_uid = FALSE;\r
	uint8_t cascade_levels = 0;\r
	uint32_t timeout = 0;\r
	\r
	int i;\r
	byte_t isOK = 0;\r
	uint8_t uid[10] = {0x00};\r
	uint32_t cuid = 0;\r
	struct Crypto1State mpcs = {0, 0};\r
	struct Crypto1State *pcs;\r
	pcs = &mpcs;\r
	\r
	// save old debuglevel, and tempory turn off dbg printing. speedissues.\r
	int OLD_MF_DBGLEVEL = MF_DBGLEVEL;	\r
	MF_DBGLEVEL = MF_DBG_NONE;\r
	\r
	LEDsoff();\r
	LED_A_ON();\r
	\r
	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);\r
\r
	if (clearTrace) \r
		clear_trace();\r
	\r
	set_tracing(TRUE);\r
	\r
	for (i = 0; i < keyCount; ++i) {\r
\r
		//mifare_classic_halt(pcs, cuid);\r
\r
		// this part is from Piwi's faster nonce collecting part in Hardnested.\r
		if (!have_uid) { // need a full select cycle to get the uid first\r
			iso14a_card_select_t card_info;		\r
			if(!iso14443a_select_card(uid, &card_info, &cuid, true, 0)) {\r
				if (MF_DBGLEVEL >= 1)	Dbprintf("ChkKeys: Can't select card (ALL)");\r
				break;\r
			}\r
			switch (card_info.uidlen) {\r
				case 4 : cascade_levels = 1; break;\r
				case 7 : cascade_levels = 2; break;\r
				case 10: cascade_levels = 3; break;\r
				default: break;\r
			}\r
			have_uid = TRUE;	\r
		} else { // no need for anticollision. We can directly select the card\r
			if(!iso14443a_select_card(uid, NULL, NULL, false, cascade_levels)) {\r
				if (MF_DBGLEVEL >= 1)	Dbprintf("ChkKeys: Can't select card (UID)");\r
				continue;\r
			}\r
		}\r
	\r
		ui64Key = bytes_to_num(datain + i * 6, 6);\r
		\r
		if (mifare_classic_auth(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) {\r
\r
			uint8_t dummy_answer = 0;\r
			ReaderTransmit(&dummy_answer, 1, NULL);\r
			timeout = GetCountSspClk() + AUTHENTICATION_TIMEOUT;\r
			\r
			// wait for the card to become ready again\r
			while(GetCountSspClk() < timeout);\r
			\r
			continue;\r
		}\r
		isOK = 1;\r
		break;\r
	}\r
	\r
	LED_B_ON();\r
    cmd_send(CMD_ACK, isOK, 0, 0, datain + i * 6, 6);\r
\r
	// restore debug level\r
	MF_DBGLEVEL = OLD_MF_DBGLEVEL;	\r
	\r
	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);\r
	LEDsoff();\r
	set_tracing(FALSE);\r
	crypto1_destroy(pcs);\r
}\r
\r
//-----------------------------------------------------------------------------\r
// MIFARE commands set debug level\r
// \r
//-----------------------------------------------------------------------------\r
void MifareSetDbgLvl(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){\r
	MF_DBGLEVEL = arg0;\r
	Dbprintf("Debug level: %d", MF_DBGLEVEL);\r
}\r
\r
//-----------------------------------------------------------------------------\r
// Work with emulator memory\r
// \r
// Note: we call FpgaDownloadAndGo(FPGA_BITSTREAM_HF) here although FPGA is not\r
// involved in dealing with emulator memory. But if it is called later, it might\r
// destroy the Emulator Memory.\r
//-----------------------------------------------------------------------------\r
\r
void MifareEMemClr(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){\r
	FpgaDownloadAndGo(FPGA_BITSTREAM_HF);\r
	emlClearMem();\r
}\r
\r
void MifareEMemSet(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){\r
	FpgaDownloadAndGo(FPGA_BITSTREAM_HF);\r
	if (arg2==0) arg2 = 16; // backwards compat... default bytewidth\r
	emlSetMem_xt(datain, arg0, arg1, arg2); // data, block num, blocks count, block byte width\r
}\r
\r
void MifareEMemGet(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){\r
	FpgaDownloadAndGo(FPGA_BITSTREAM_HF);\r
	byte_t buf[USB_CMD_DATA_SIZE] = {0x00};\r
	emlGetMem(buf, arg0, arg1); // data, block num, blocks count (max 4)\r
\r
	LED_B_ON();\r
	cmd_send(CMD_ACK,arg0,arg1,0,buf,USB_CMD_DATA_SIZE);\r
	LED_B_OFF();\r
}\r
\r
//-----------------------------------------------------------------------------\r
// Load a card into the emulator memory\r
// \r
//-----------------------------------------------------------------------------\r
void MifareECardLoad(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain){\r
	uint8_t numSectors = arg0;\r
	uint8_t keyType = arg1;\r
	uint64_t ui64Key = 0;\r
	uint32_t cuid = 0;\r
	struct Crypto1State mpcs = {0, 0};\r
	struct Crypto1State *pcs;\r
	pcs = &mpcs;\r
\r
	// variables\r
	byte_t dataoutbuf[16] = {0x00};\r
	byte_t dataoutbuf2[16] = {0x00};\r
	uint8_t uid[10] = {0x00};\r
\r
	LED_A_ON();\r
	LED_B_OFF();\r
	LED_C_OFF();\r
	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);\r
	\r
	clear_trace();\r
	set_tracing(TRUE);\r
	\r
	bool isOK = true;\r
\r
	if(!iso14443a_select_card(uid, NULL, &cuid, true, 0)) {\r
		isOK = false;\r
		if (MF_DBGLEVEL >= 1)	Dbprintf("Can't select card");\r
	}\r
		\r
	for (uint8_t sectorNo = 0; isOK && sectorNo < numSectors; sectorNo++) {\r
		ui64Key = emlGetKey(sectorNo, keyType);\r
		if (sectorNo == 0){\r
			if(isOK && mifare_classic_auth(pcs, cuid, FirstBlockOfSector(sectorNo), keyType, ui64Key, AUTH_FIRST)) {\r
				isOK = false;\r
				if (MF_DBGLEVEL >= 1)	Dbprintf("Sector[%2d]. Auth error", sectorNo);\r
				break;\r
			}\r
		} else {\r
			if(isOK && mifare_classic_auth(pcs, cuid, FirstBlockOfSector(sectorNo), keyType, ui64Key, AUTH_NESTED)) {\r
				isOK = false;\r
				if (MF_DBGLEVEL >= 1)	Dbprintf("Sector[%2d]. Auth nested error", sectorNo);\r
				break;\r
			}\r
		}\r
		\r
		for (uint8_t blockNo = 0; isOK && blockNo < NumBlocksPerSector(sectorNo); blockNo++) {\r
			if(isOK && mifare_classic_readblock(pcs, cuid, FirstBlockOfSector(sectorNo) + blockNo, dataoutbuf)) {\r
				isOK = false;\r
				if (MF_DBGLEVEL >= 1)	Dbprintf("Error reading sector %2d block %2d", sectorNo, blockNo);\r
				break;\r
			}\r
			if (isOK) {\r
				if (blockNo < NumBlocksPerSector(sectorNo) - 1) {\r
					emlSetMem(dataoutbuf, FirstBlockOfSector(sectorNo) + blockNo, 1);\r
				} else {	// sector trailer, keep the keys, set only the AC\r
					emlGetMem(dataoutbuf2, FirstBlockOfSector(sectorNo) + blockNo, 1);\r
					memcpy(&dataoutbuf2[6], &dataoutbuf[6], 4);\r
					emlSetMem(dataoutbuf2,  FirstBlockOfSector(sectorNo) + blockNo, 1);\r
				}\r
			}\r
		}\r
\r
	}\r
\r
	if(mifare_classic_halt(pcs, cuid))\r
		if (MF_DBGLEVEL >= 1)\r
			Dbprintf("Halt error");\r
\r
	//  ----------------------------- crypto1 destroy\r
	crypto1_destroy(pcs);\r
\r
	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);\r
	LEDsoff();\r
	\r
	if (MF_DBGLEVEL >= 2) DbpString("EMUL FILL SECTORS FINISHED");\r
\r
	set_tracing(FALSE);\r
}\r
\r
\r
//-----------------------------------------------------------------------------\r
// Work with "magic Chinese" card (email him: ouyangweidaxian@live.cn)\r
// \r
// PARAMS - workFlags\r
// bit 0 - need get UID\r
// bit 1 - need wupC\r
// bit 2 - need HALT after sequence\r
// bit 3 - need turn on FPGA before sequence\r
// bit 4 - need turn off FPGA\r
// bit 5 - need to set datain instead of issuing USB reply (called via ARM for StandAloneMode14a)\r
// bit 6 - wipe tag.\r
//-----------------------------------------------------------------------------\r
// magic uid card generation 1 commands\r
uint8_t wupC1[] = { MIFARE_MAGICWUPC1 }; \r
uint8_t wupC2[] = { MIFARE_MAGICWUPC2 }; \r
uint8_t wipeC[] = { MIFARE_MAGICWIPEC }; \r
	\r
void MifareCSetBlock(uint32_t arg0, uint32_t arg1, uint8_t *datain){\r
  \r
	// params\r
	uint8_t workFlags = arg0;\r
	uint8_t blockNo = arg1;\r
	\r
	// variables\r
	bool isOK = false; //assume we will get an error\r
	uint8_t errormsg = 0x00;\r
	uint8_t uid[10] = {0x00};\r
	uint8_t data[18] = {0x00};\r
	uint32_t cuid = 0;\r
	\r
	uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE] = {0x00};\r
	uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE] = {0x00};\r
\r
	if (workFlags & MAGIC_INIT) {\r
		LED_A_ON();\r
		LED_B_OFF();\r
		iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);\r
		clear_trace();\r
		set_tracing(TRUE);\r
	}\r
\r
	//loop doesn't loop just breaks out if error\r
	while (true) {\r
		// read UID and return to client with write\r
		if (workFlags & MAGIC_UID) {\r
			if(!iso14443a_select_card(uid, NULL, &cuid, true, 0)) {\r
				if (MF_DBGLEVEL >= MF_DBG_ERROR)	Dbprintf("Can't select card");\r
				errormsg = MAGIC_UID;\r
				// break;\r
			}\r
			\r
			if ( mifare_classic_halt_ex(NULL) ) break;\r
		}\r
	\r
		// wipe tag, fill it with zeros\r
		if (workFlags & MAGIC_WIPE){\r
			ReaderTransmitBitsPar(wupC1, 7, NULL, NULL);\r
			if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {\r
				if (MF_DBGLEVEL >= MF_DBG_ERROR)	Dbprintf("wupC1 error");\r
				errormsg = MAGIC_WIPE;\r
				break;\r
			}\r
\r
			ReaderTransmit(wipeC, sizeof(wipeC), NULL);\r
			if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {\r
				if (MF_DBGLEVEL >= MF_DBG_ERROR)	Dbprintf("wipeC error");\r
				errormsg = MAGIC_WIPE;\r
				break;\r
			}\r
\r
			if ( mifare_classic_halt_ex(NULL) ) break;\r
		}	\r
\r
		// write block\r
		if (workFlags & MAGIC_WUPC) {\r
			ReaderTransmitBitsPar(wupC1, 7, NULL, NULL);\r
			if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {\r
				if (MF_DBGLEVEL >= MF_DBG_ERROR)	Dbprintf("wupC1 error");\r
				errormsg = MAGIC_WUPC;\r
				break;\r
			}\r
\r
			ReaderTransmit(wupC2, sizeof(wupC2), NULL);\r
			if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {\r
				if (MF_DBGLEVEL >= MF_DBG_ERROR)	Dbprintf("wupC2 error");\r
				errormsg = MAGIC_WUPC;\r
				break;\r
			}\r
		}\r
\r
		if ((mifare_sendcmd_short(NULL, 0, ISO14443A_CMD_WRITEBLOCK, blockNo, receivedAnswer, receivedAnswerPar, NULL) != 1) || (receivedAnswer[0] != 0x0a)) {\r
			if (MF_DBGLEVEL >= MF_DBG_ERROR)	Dbprintf("write block send command error");\r
			errormsg = 4;\r
			break;\r
		}\r
	\r
		memcpy(data, datain, 16);\r
		AppendCrc14443a(data, 16);\r
	\r
		ReaderTransmit(data, sizeof(data), NULL);\r
		if ((ReaderReceive(receivedAnswer, receivedAnswerPar) != 1) || (receivedAnswer[0] != 0x0a)) {\r
			if (MF_DBGLEVEL >= MF_DBG_ERROR)	Dbprintf("write block send data error");\r
			errormsg = 0;\r
			break;\r
		}	\r
	\r
		if (workFlags & MAGIC_OFF) \r
			if ( mifare_classic_halt_ex(NULL) ) break;\r
		\r
		isOK = true;\r
		break;\r
\r
	} // end while	\r
\r
	if (isOK )\r
		cmd_send(CMD_ACK,1,0,0,uid,sizeof(uid));\r
	else\r
		OnErrorMagic(errormsg);\r
\r
	if (workFlags & MAGIC_OFF)\r
		OnSuccessMagic();\r
}\r
\r
void MifareCGetBlock(uint32_t arg0, uint32_t arg1, uint8_t *datain){\r
    \r
	uint8_t workFlags = arg0;\r
	uint8_t blockNo = arg1;\r
	uint8_t errormsg = 0x00;\r
	bool isOK = false; //assume we will get an error\r
	\r
	// variables\r
	uint8_t data[MAX_MIFARE_FRAME_SIZE];\r
	uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE] = {0x00};\r
	uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE] = {0x00};\r
	\r
	memset(data, 0x00, sizeof(data));\r
	\r
	if (workFlags & MAGIC_INIT) {\r
		LED_A_ON();\r
		LED_B_OFF();\r
		iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);	\r
		clear_trace();\r
		set_tracing(TRUE);\r
	}\r
\r
	//loop doesn't loop just breaks out if error or done\r
	while (true) {\r
		if (workFlags & MAGIC_WUPC) {\r
			ReaderTransmitBitsPar(wupC1, 7, NULL, NULL);\r
			if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {\r
				if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("wupC1 error");\r
				errormsg = MAGIC_WUPC;\r
				break;\r
			}\r
\r
			ReaderTransmit(wupC2, sizeof(wupC2), NULL);\r
			if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {\r
				if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("wupC2 error");\r
				errormsg = MAGIC_WUPC;\r
				break;\r
			}\r
		}\r
\r
		// read block		\r
		if ((mifare_sendcmd_short(NULL, 0, ISO14443A_CMD_READBLOCK, blockNo, receivedAnswer, receivedAnswerPar, NULL) != 18)) {\r
			if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("read block send command error");\r
			errormsg = 0;\r
			break;\r
		}\r
		\r
		memcpy(data, receivedAnswer, sizeof(data));\r
		\r
		// send HALT\r
		if (workFlags & MAGIC_HALT)\r
			mifare_classic_halt_ex(NULL);\r
\r
		isOK = true;\r
		break;\r
	}\r
	// if MAGIC_DATAIN, the data stays on device side.\r
	if (workFlags & MAGIC_DATAIN) {\r
		if (isOK)\r
			memcpy(datain, data, sizeof(data));\r
	} else {\r
		if (isOK) \r
			cmd_send(CMD_ACK,1,0,0,data,sizeof(data));	\r
		else \r
			OnErrorMagic(errormsg);	\r
	}\r
	\r
	if (workFlags & MAGIC_OFF)\r
		OnSuccessMagic();\r
}\r
\r
void MifareCIdent(){\r
	\r
	// variables\r
	bool isOK = true;	\r
	uint8_t receivedAnswer[1] = {0x00};\r
	uint8_t receivedAnswerPar[1] = {0x00};\r
\r
	ReaderTransmitBitsPar(wupC1, 7, NULL, NULL);\r
	if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {\r
		isOK = false;\r
	}\r
\r
	ReaderTransmit(wupC2, sizeof(wupC2), NULL);\r
	if(!ReaderReceive(receivedAnswer, receivedAnswerPar) || (receivedAnswer[0] != 0x0a)) {\r
		isOK = false;\r
	}\r
\r
	// removed the if,  since some magic tags misbehavies and send an answer to it.\r
	mifare_classic_halt(NULL, 0);\r
	cmd_send(CMD_ACK,isOK,0,0,0,0);\r
}\r
\r
void OnSuccessMagic(){\r
	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);\r
	LEDsoff();\r
	set_tracing(FALSE);	\r
}\r
void OnErrorMagic(uint8_t reason){\r
	//          ACK, ISOK, reason,0,0,0\r
	cmd_send(CMD_ACK,0,reason,0,0,0);\r
	OnSuccessMagic();\r
}\r
//\r
// DESFIRE\r
//\r
void Mifare_DES_Auth1(uint8_t arg0, uint8_t *datain){\r
	byte_t dataout[12] = {0x00};\r
	uint8_t uid[10] = {0x00};\r
	uint32_t cuid = 0;\r
    \r
	iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);\r
	clear_trace();\r
	set_tracing(true);\r
\r
	int len = iso14443a_select_card(uid, NULL, &cuid, true, 0);\r
	if(!len) {\r
		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Can't select card");\r
		OnError(1);\r
		return;\r
	};\r
\r
	if(mifare_desfire_des_auth1(cuid, dataout)){\r
		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Authentication part1: Fail.");\r
		OnError(4);\r
		return;\r
	}\r
\r
	if (MF_DBGLEVEL >= MF_DBG_EXTENDED) DbpString("AUTH 1 FINISHED");\r
    cmd_send(CMD_ACK, 1, cuid, 0, dataout, sizeof(dataout));\r
}\r
\r
void Mifare_DES_Auth2(uint32_t arg0, uint8_t *datain){\r
\r
	uint32_t cuid = arg0;\r
	uint8_t key[16] = {0x00};\r
	byte_t dataout[12] = {0x00};\r
	byte_t isOK = 0;\r
    \r
	memcpy(key, datain, 16);\r
	\r
	isOK = mifare_desfire_des_auth2(cuid, key, dataout);\r
	\r
	if( isOK) {\r
	    if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("Authentication part2: Failed");  \r
		OnError(4);\r
		return;\r
	}\r
\r
	if (MF_DBGLEVEL >= MF_DBG_EXTENDED) DbpString("AUTH 2 FINISHED");\r
\r
	cmd_send(CMD_ACK, isOK, 0, 0, dataout, sizeof(dataout));\r
	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);\r
	LEDsoff();\r
	set_tracing(FALSE);\r
}