X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/13fc2e9c71175842dda4dedd878a92e07d519010..204b7084240d9512490bb355f315c32f5fe5d523:/armsrc/mifaresniff.c

diff --git a/armsrc/mifaresniff.c b/armsrc/mifaresniff.c
index 59203478..1ce0a4a8 100644
--- a/armsrc/mifaresniff.c
+++ b/armsrc/mifaresniff.c
@@ -16,10 +16,9 @@ static uint8_t sniffUIDType = 0;
 static uint8_t sniffUID[10] = {0,0,0,0,0,0,0,0,0,0};
 static uint8_t sniffATQA[2] = {0,0};
 static uint8_t sniffSAK = 0;
-static uint8_t sniffBuf[19];
+static uint8_t sniffBuf[17];
 static uint32_t timerData = 0;
 
-
 void MfSniffInit(void){
 	memset(sniffUID, 0x00, sizeof(sniffUID));
 	memset(sniffATQA, 0x00, sizeof(sniffATQA));
@@ -61,41 +60,40 @@ bool RAMFUNC MfSniffLogic(const uint8_t *data, uint16_t len, uint8_t *parity, ui
 		}
 		case SNF_ATQA:{
 			// Select ALL from reader
-			if ((reader) && (len == 2) && (data[0] == 0x93) && (data[1] == 0x20)) {
+			if ((reader) && (len == 2) && (data[0] == 0x93) && (data[1] == 0x20))
 				sniffState = SNF_ANTICOL1;
-			}
 			break;
 		}
 		case SNF_ANTICOL1:{
 			// UID from tag (CL1) 
 			if ((!reader) && (len == 5) && ((data[0] ^ data[1] ^ data[2] ^ data[3]) == data[4])) {
-				memcpy(sniffUID + 3, data, 4);
+				memcpy(sniffUID, data, 4);
 				sniffState = SNF_UID1;
 			}
 			break;
 		}
 		case SNF_UID1:{
 			// Select 4 Byte UID from reader
-			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)))
 				sniffState = SNF_SAK;
-			}
 			break;
 		}
 		case SNF_SAK:{
 			if ((!reader) && (len == 3) && (CheckCrc14443(CRC_14443_A, data, 3))) { // SAK from card?
 				sniffSAK = data[0];
-				if (sniffUID[3] == 0x88) {			// CL2 UID part to be expected
-					sniffState = SNF_ANTICOL2;
-				} else {							// select completed
+				if (sniffUID[0] == 0x88)			// CL2/3 UID part to be expected					
+					sniffState = (sniffState == SNF_ANTICOL2 ) ? SNF_ANTICOL3 : SNF_ANTICOL2;
+				else								// select completed
 					sniffState = SNF_CARD_IDLE;
-				}
 			}
 			break;
 		}
 		case SNF_ANTICOL2:{
 			 // CL2 UID 
 			if ((!reader) && (len == 5) && ((data[0] ^ data[1] ^ data[2] ^ data[3]) == data[4])) {
-				memcpy(sniffUID, sniffUID+4, 3);
+				sniffUID[0] = sniffUID[1];
+				sniffUID[1] = sniffUID[2];
+				sniffUID[2] = sniffUID[3];
 				memcpy(sniffUID+3, data, 4);
 				sniffUIDType = SNF_UID_7;
 				sniffState = SNF_UID2;
@@ -104,16 +102,18 @@ bool RAMFUNC MfSniffLogic(const uint8_t *data, uint16_t len, uint8_t *parity, ui
 		}
 		case SNF_UID2:{
 			// Select 2nd part of 7 Byte UID
-			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)))
 				sniffState = SNF_SAK;
-			}
 			break;
 		}
 		case SNF_ANTICOL3:{
 			// CL3 UID 
 			if ((!reader) && (len == 5) && ((data[0] ^ data[1] ^ data[2] ^ data[3]) == data[4])) { 
-				memcpy(sniffUID, sniffUID+4, 3);
-				memcpy(sniffUID+3, data, 4);
+				// 3+3+4 = 10.
+				sniffUID[3] = sniffUID[4];
+				sniffUID[4] = sniffUID[5];
+				sniffUID[5] = sniffUID[6];
+				memcpy(sniffUID+6, data, 4);
 				sniffUIDType = SNF_UID_10;
 				sniffState = SNF_UID3;
 			}
@@ -121,16 +121,15 @@ bool RAMFUNC MfSniffLogic(const uint8_t *data, uint16_t len, uint8_t *parity, ui
 		}
 		case SNF_UID3:{
 			// Select 3nd part of 10 Byte UID
-			if ((reader) && (len == 9) && (data[0] == 0x97) && (data[1] == 0x70) && (CheckCrc14443(CRC_14443_A, data, 9))) {
+			if ((reader) && (len == 9) && (data[0] == 0x97) && (data[1] == 0x70) && (CheckCrc14443(CRC_14443_A, data, 9)))
 				sniffState = SNF_SAK;
-			}
 			break;
 		}
 		case SNF_CARD_IDLE:{	// trace the card select sequence
 			sniffBuf[0] = 0xFF;
 			sniffBuf[1] = 0xFF;
 			memcpy(sniffBuf + 2, sniffUID, sizeof(sniffUID));
-			memcpy(sniffBuf + 9, sniffATQA, sizeof(sniffATQA));
+			memcpy(sniffBuf + 12, sniffATQA, sizeof(sniffATQA));
 			sniffBuf[14] = sniffSAK;
 			sniffBuf[15] = 0xFF;
 			sniffBuf[16] = 0xFF;
@@ -168,20 +167,20 @@ bool intMfSniffSend() {
 	int pckSize = 0;
 	int pckLen = BigBuf_get_traceLen();
 	int pckNum = 0;
-	uint8_t *trace = BigBuf_get_addr();
+	uint8_t *data = BigBuf_get_addr();
 	
 	FpgaDisableSscDma();
 	while (pckLen > 0) {
 		pckSize = MIN(USB_CMD_DATA_SIZE, pckLen);
 		LED_B_ON();
-		cmd_send(CMD_ACK, 1, BigBuf_get_traceLen(), pckSize, trace + BigBuf_get_traceLen() - pckLen, pckSize);
+		cmd_send(CMD_ACK, 1, BigBuf_get_traceLen(), pckSize, data + BigBuf_get_traceLen() - pckLen, pckSize);
 		LED_B_OFF();
 		pckLen -= pckSize;
 		pckNum++;
 	}
 
 	LED_B_ON();
-	cmd_send(CMD_ACK,2,0,0,0,0);
+	cmd_send(CMD_ACK,2,0,0,0,0);  // 2 == data transfer is finished.
 	LED_B_OFF();
 
 	clear_trace();