X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/660d641a03456e99ea83c68dbd3d03bae2b64573..36f84d474844a67f389239c0ec361f0dfe88983a:/armsrc/mifaresniff.c

diff --git a/armsrc/mifaresniff.c b/armsrc/mifaresniff.c
index f95ca3df..0cc2963b 100644
--- a/armsrc/mifaresniff.c
+++ b/armsrc/mifaresniff.c
@@ -13,108 +13,100 @@
 
 static int sniffState = SNF_INIT;
 static uint8_t sniffUIDType;
-static uint8_t sniffUID[8];
-static uint8_t sniffATQA[2];
+static uint8_t sniffUID[8] = {0x00};
+static uint8_t sniffATQA[2] = {0x00};
 static uint8_t sniffSAK;
-static uint8_t sniffBuf[16];
-static int timerData = 0;
+static uint8_t sniffBuf[16] = {0x00};
+static uint32_t timerData = 0;
 
 
-int MfSniffInit(void){
-	rsamples = 0;
+bool MfSniffInit(void){
 	memset(sniffUID, 0x00, 8);
 	memset(sniffATQA, 0x00, 2);
 	sniffSAK = 0;
 	sniffUIDType = SNF_UID_4;
 
-	return 0;
+	return FALSE;
 }
 
-int MfSniffEnd(void){
-//	UsbCommand ack = {CMD_ACK, {0, 0, 0}};
-
+bool MfSniffEnd(void){
 	LED_B_ON();
-  cmd_send(CMD_ACK,0,0,0,0,0);
-//	UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand));
+	cmd_send(CMD_ACK,0,0,0,0,0);
 	LED_B_OFF();
 
-	return 0;
+	return FALSE;
 }
 
-int RAMFUNC MfSniffLogic(const uint8_t * data, int len, uint32_t parity, int bitCnt, int reader) {
+bool RAMFUNC MfSniffLogic(const uint8_t *data, uint16_t len, uint8_t *parity, uint16_t bitCnt, bool reader) {
 
-	if ((len == 1) && (bitCnt = 9) && (data[0] > 0x0F)) { 
+	if (reader && (len == 1) && (bitCnt == 7)) { 		// reset on 7-Bit commands from reader
 		sniffState = SNF_INIT;
 	}
 
 	switch (sniffState) {
 		case SNF_INIT:{
-			if ((reader) && (len == 1) && (bitCnt == 9) && ((data[0] == 0x26) || (data[0] == 0x52))) { 
+			if ((len == 1) && (reader) && (bitCnt == 7) ) {  // REQA or WUPA from reader
 				sniffUIDType = SNF_UID_4;
 				memset(sniffUID, 0x00, 8);
 				memset(sniffATQA, 0x00, 2);
 				sniffSAK = 0;
-
 				sniffState = SNF_WUPREQ;
 			}
 			break;
 		}
 		case SNF_WUPREQ:{
-			if ((!reader) && (len == 2)) { 
+			if ((!reader) && (len == 2)) { 		// ATQA from tag
 				memcpy(sniffATQA, data, 2);
-
 				sniffState = SNF_ATQA;
 			}
 			break;
 		}
 		case SNF_ATQA:{
-			if ((reader) && (len == 2) && (data[0] == 0x93) && (data[1] == 0x20)) { 
+			if ((reader) && (len == 2) && (data[0] == 0x93) && (data[1] == 0x20)) { // Select ALL from reader
 				sniffState = SNF_ANTICOL1;
 			}
 			break;
 		}
 		case SNF_ANTICOL1:{
-			if ((!reader) && (len == 5) && ((data[0] ^ data[1] ^ data[2] ^ data[3]) == data[4])) { 
+			if ((!reader) && (len == 5) && ((data[0] ^ data[1] ^ data[2] ^ data[3]) == data[4])) {  // UID from tag (CL1) 
 				memcpy(sniffUID + 3, data, 4);
-			
 				sniffState = SNF_UID1;
 			}
 			break;
 		}
 		case SNF_UID1:{
-			if ((reader) && (len == 9) && (data[0] == 0x93) && (data[1] == 0x70) && (CheckCrc14443(CRC_14443_A, data, 9))) { 
+			if ((reader) && (len == 9) && (data[0] == 0x93) && (data[1] == 0x70) && (CheckCrc14443(CRC_14443_A, data, 9))) {   // Select 4 Byte UID from reader
 				sniffState = SNF_SAK;
 			}
 			break;
 		}
 		case SNF_SAK:{
-			if ((!reader) && (len == 3) && (CheckCrc14443(CRC_14443_A, data, 3))) { 
+			if ((!reader) && (len == 3) && (CheckCrc14443(CRC_14443_A, data, 3))) { // SAK from card?
 				sniffSAK = data[0];
-				if (sniffUID[3] == 0x88) {
+				if (sniffUID[3] == 0x88) {			// CL2 UID part to be expected
 					sniffState = SNF_ANTICOL2;
-				} else {
+				} else {							// select completed
 					sniffState = SNF_CARD_IDLE;
 				}
 			}
 			break;
 		}
 		case SNF_ANTICOL2:{
-			if ((!reader) && (len == 5) && ((data[0] ^ data[1] ^ data[2] ^ data[3]) == data[4])) { 
-				memcpy(sniffUID, data, 4);
+			if ((!reader) && (len == 5) && ((data[0] ^ data[1] ^ data[2] ^ data[3]) == data[4])) { // CL2 UID 
+				memcpy(sniffUID, sniffUID+4, 3);
+				memcpy(sniffUID+3, data, 4);
 				sniffUIDType = SNF_UID_7;
-			
 				sniffState = SNF_UID2;
-		}
+			}
 			break;
 		}
 		case SNF_UID2:{
-			if ((reader) && (len == 9) && (data[0] == 0x95) && (data[1] == 0x70) && (CheckCrc14443(CRC_14443_A, data, 9))) { 
+			if ((reader) && (len == 9) && (data[0] == 0x95) && (data[1] == 0x70) && (CheckCrc14443(CRC_14443_A, data, 9))) {	// Select 2nd part of 7 Byte UID
 				sniffState = SNF_SAK;
-	Dbprintf("SNF_SAK");				
 			}
 			break;
 		}
-		case SNF_CARD_IDLE:{
+		case SNF_CARD_IDLE:{	// trace the card select sequence
 			sniffBuf[0] = 0xFF;
 			sniffBuf[1] = 0xFF;
 			memcpy(sniffBuf + 2, sniffUID, 7);
@@ -122,19 +114,16 @@ int RAMFUNC MfSniffLogic(const uint8_t * data, int len, uint32_t parity, int bit
 			sniffBuf[11] = sniffSAK;
 			sniffBuf[12] = 0xFF;
 			sniffBuf[13] = 0xFF;
-			LogTrace(sniffBuf, 14, 0, parity, true);
-			timerData = GetTickCount();
-		}
-		case SNF_CARD_CMD:{
-			LogTrace(data, len, 0, parity, true);
-
+			LogTrace(sniffBuf, 14, 0, 0, NULL, TRUE);
+		}	// intentionally no break;
+		case SNF_CARD_CMD:{		
+			LogTrace(data, len, 0, 0, NULL, TRUE);
 			sniffState = SNF_CARD_RESP;
 			timerData = GetTickCount();
 			break;
 		}
 		case SNF_CARD_RESP:{
-			LogTrace(data, len, 0, parity, false);
-
+			LogTrace(data, len, 0, 0, NULL, FALSE);
 			sniffState = SNF_CARD_CMD;
 			timerData = GetTickCount();
 			break;
@@ -145,51 +134,41 @@ int RAMFUNC MfSniffLogic(const uint8_t * data, int len, uint32_t parity, int bit
 		break;
 	}
 
-	return 0;
+
+	return FALSE;
 }
 
-int RAMFUNC MfSniffSend(int maxTimeoutMs) {
-	if (traceLen && (timerData + maxTimeoutMs < GetTickCount())) {
+bool RAMFUNC MfSniffSend(uint16_t maxTimeoutMs) {
+	if (BigBuf_get_traceLen() && (GetTickCount() > timerData + maxTimeoutMs)) {
 		return intMfSniffSend();
 	}
-	return 0;
+	return FALSE;
 }
 
-// internal seding function. not a RAMFUNC.
-int intMfSniffSend() {
-	
+// internal sending function. not a RAMFUNC.
+bool intMfSniffSend() {
+
 	int pckSize = 0;
-	int pckLen = traceLen;
+	int pckLen = BigBuf_get_traceLen();
 	int pckNum = 0;
+	uint8_t *trace = BigBuf_get_addr();
 	
-	if (!traceLen) return 0;
-
 	FpgaDisableSscDma();
-
 	while (pckLen > 0) {
-		pckSize = MIN(32, pckLen);
-//		UsbCommand ack = {CMD_ACK, {1, pckSize, pckNum}};
-//		memcpy(ack.d.asBytes, trace + traceLen - pckLen, pckSize);
-	
+		pckSize = MIN(USB_CMD_DATA_SIZE, pckLen);
 		LED_B_ON();
-    cmd_send(CMD_ACK,1,pckSize,pckNum,trace + traceLen - pckLen,pckSize);
-//		UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand));
-//		SpinDelay(20);
+		cmd_send(CMD_ACK, 1, BigBuf_get_traceLen(), pckSize, trace + BigBuf_get_traceLen() - pckLen, pckSize);
 		LED_B_OFF();
 
 		pckLen -= pckSize;
 		pckNum++;
 	}
 
-//	UsbCommand ack = {CMD_ACK, {2, 0, 0}};
-
 	LED_B_ON();
-  cmd_send(CMD_ACK,2,0,0,0,0);
-//	UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand));
+	cmd_send(CMD_ACK,2,0,0,0,0);
 	LED_B_OFF();
 
-	traceLen = 0;
-	memset(trace, 0x44, TRACE_SIZE);
+	clear_trace();
 	
-	return 1;
+	return TRUE;
 }