major USB update

[proxmark3-svn] / armsrc / mifaresniff.c

//-----------------------------------------------------------------------------\r
// Merlok - 2012\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 mifare classic sniffer.\r
//-----------------------------------------------------------------------------\r
\r
#include "mifaresniff.h"\r
#include "apps.h"\r
\r
static int sniffState = SNF_INIT;\r
static uint8_t sniffUIDType;\r
static uint8_t sniffUID[8];\r
static uint8_t sniffATQA[2];\r
static uint8_t sniffSAK;\r
static uint8_t sniffBuf[16];\r
static int timerData = 0;\r
\r
\r
int MfSniffInit(void){\r
	rsamples = 0;\r
	memset(sniffUID, 0x00, 8);\r
	memset(sniffATQA, 0x00, 2);\r
	sniffSAK = 0;\r
	sniffUIDType = SNF_UID_4;\r
\r
	return 0;\r
}\r
\r
int MfSniffEnd(void){\r
	UsbCommand ack = {CMD_ACK, {0, 0, 0}};\r
\r
	LED_B_ON();\r
	UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand));\r
	LED_B_OFF();\r
\r
	return 0;\r
}\r
\r
int RAMFUNC MfSniffLogic(const uint8_t * data, int len, uint32_t parity, int bitCnt, int reader) {\r
\r
	if ((len == 1) && (bitCnt = 9) && (data[0] > 0x0F)) { \r
		sniffState = SNF_INIT;\r
	}\r
\r
	switch (sniffState) {\r
		case SNF_INIT:{\r
			if ((reader) && (len == 1) && (bitCnt == 9) && ((data[0] == 0x26) || (data[0] == 0x52))) { \r
				sniffUIDType = SNF_UID_4;\r
				memset(sniffUID, 0x00, 8);\r
				memset(sniffATQA, 0x00, 2);\r
				sniffSAK = 0;\r
\r
				sniffState = SNF_WUPREQ;\r
			}\r
			break;\r
		}\r
		case SNF_WUPREQ:{\r
			if ((!reader) && (len == 2)) { \r
				memcpy(sniffATQA, data, 2);\r
\r
				sniffState = SNF_ATQA;\r
			}\r
			break;\r
		}\r
		case SNF_ATQA:{\r
			if ((reader) && (len == 2) && (data[0] == 0x93) && (data[1] == 0x20)) { \r
				sniffState = SNF_ANTICOL1;\r
			}\r
			break;\r
		}\r
		case SNF_ANTICOL1:{\r
			if ((!reader) && (len == 5) && ((data[0] ^ data[1] ^ data[2] ^ data[3]) == data[4])) { \r
				memcpy(sniffUID + 3, data, 4);\r
			\r
				sniffState = SNF_UID1;\r
			}\r
			break;\r
		}\r
		case SNF_UID1:{\r
			if ((reader) && (len == 9) && (data[0] == 0x93) && (data[1] == 0x70) && (CheckCrc14443(CRC_14443_A, data, 9))) { \r
				sniffState = SNF_SAK;\r
			}\r
			break;\r
		}\r
		case SNF_SAK:{\r
			if ((!reader) && (len == 3) && (CheckCrc14443(CRC_14443_A, data, 3))) { \r
				sniffSAK = data[0];\r
				if (sniffUID[3] == 0x88) {\r
					sniffState = SNF_ANTICOL2;\r
				} else {\r
					sniffState = SNF_CARD_IDLE;\r
				}\r
			}\r
			break;\r
		}\r
		case SNF_ANTICOL2:{\r
			if ((!reader) && (len == 5) && ((data[0] ^ data[1] ^ data[2] ^ data[3]) == data[4])) { \r
				memcpy(sniffUID, data, 4);\r
				sniffUIDType = SNF_UID_7;\r
			\r
				sniffState = SNF_UID2;\r
		}\r
			break;\r
		}\r
		case SNF_UID2:{\r
			if ((reader) && (len == 9) && (data[0] == 0x95) && (data[1] == 0x70) && (CheckCrc14443(CRC_14443_A, data, 9))) { \r
				sniffState = SNF_SAK;\r
	Dbprintf("SNF_SAK");				\r
			}\r
			break;\r
		}\r
		case SNF_CARD_IDLE:{\r
			sniffBuf[0] = 0xFF;\r
			sniffBuf[1] = 0xFF;\r
			memcpy(sniffBuf + 2, sniffUID, 7);\r
			memcpy(sniffBuf + 9, sniffATQA, 2);\r
			sniffBuf[11] = sniffSAK;\r
			sniffBuf[12] = 0xFF;\r
			sniffBuf[13] = 0xFF;\r
			LogTrace(sniffBuf, 14, 0, parity, true);\r
			timerData = GetTickCount();\r
		}\r
		case SNF_CARD_CMD:{\r
			LogTrace(data, len, 0, parity, true);\r
\r
			sniffState = SNF_CARD_RESP;\r
			timerData = GetTickCount();\r
			break;\r
		}\r
		case SNF_CARD_RESP:{\r
			LogTrace(data, len, 0, parity, false);\r
\r
			sniffState = SNF_CARD_CMD;\r
			timerData = GetTickCount();\r
			break;\r
		}\r
	\r
		default:\r
			sniffState = SNF_INIT;\r
		break;\r
	}\r
\r
	return 0;\r
}\r
\r
int RAMFUNC MfSniffSend(int maxTimeoutMs) {\r
	if (traceLen && (timerData + maxTimeoutMs < GetTickCount())) {\r
		return intMfSniffSend();\r
	}\r
	return 0;\r
}\r
\r
// internal seding function. not a RAMFUNC.\r
int intMfSniffSend() {\r
	\r
	int pckSize = 0;\r
	int pckLen = traceLen;\r
	int pckNum = 0;\r
	\r
	if (!traceLen) return 0;\r
\r
	FpgaDisableSscDma();\r
\r
	while (pckLen > 0) {\r
		pckSize = MIN(32, pckLen);\r
		UsbCommand ack = {CMD_ACK, {1, pckSize, pckNum}};\r
		memcpy(ack.d.asBytes, trace + traceLen - pckLen, pckSize);\r
	\r
		LED_B_ON();\r
		UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand));\r
		SpinDelay(20);\r
		LED_B_OFF();\r
\r
		pckLen -= pckSize;\r
		pckNum++;\r
	}\r
\r
	UsbCommand ack = {CMD_ACK, {2, 0, 0}};\r
\r
	LED_B_ON();\r
	UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand));\r
	LED_B_OFF();\r
\r
	traceLen = 0;\r
	memset(trace, 0x44, TRACE_SIZE);\r
	\r
	return 1;\r
}\r