X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/ec56429002dbccf8af357253a758ec88f359a21e..39864b0bd41dd5e896bcb8eeabcf2c3932f2203a:/armsrc/mifaresniff.c

diff --git a/armsrc/mifaresniff.c b/armsrc/mifaresniff.c
index 25c7780d..aefe6962 100644
--- a/armsrc/mifaresniff.c
+++ b/armsrc/mifaresniff.c
@@ -11,5 +11,182 @@
 #include "mifaresniff.h"
 #include "apps.h"
 
+static int sniffState = SNF_INIT;
+static uint8_t sniffUIDType;
+static uint8_t sniffUID[8];
+static uint8_t sniffATQA[2];
+static uint8_t sniffSAK;
+static uint8_t sniffBuf[16];
+static int timerData = 0;
 
 
+int MfSniffInit(void){
+	rsamples = 0;
+	memset(sniffUID, 0x00, 8);
+	memset(sniffATQA, 0x00, 2);
+	sniffSAK = 0;
+	sniffUIDType = SNF_UID_4;
+
+	return 0;
+}
+
+int MfSniffEnd(void){
+	UsbCommand ack = {CMD_ACK, {0, 0, 0}};
+
+	LED_B_ON();
+	UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand));
+	LED_B_OFF();
+
+	return 0;
+}
+
+int RAMFUNC MfSniffLogic(const uint8_t * data, int len, int bitCnt, int reader) {
+
+	if ((len == 1) && (bitCnt = 9)) { 
+		sniffState = SNF_INIT;
+	}
+
+	switch (sniffState) {
+		case SNF_INIT:{
+			if ((reader) && (len == 1) && (bitCnt == 9) && ((data[0] == 0x26) || (data[0] == 0x52))) { 
+				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)) { 
+				memcpy(sniffATQA, data, 2);
+
+				sniffState = SNF_ATQA;
+			}
+			break;
+		}
+		case SNF_ATQA:{
+			if ((reader) && (len == 2) && (data[0] == 0x93) && (data[1] == 0x20)) { 
+				sniffState = SNF_ANTICOL1;
+			}
+			break;
+		}
+		case SNF_ANTICOL1:{
+			if ((!reader) && (len == 5) && ((data[0] ^ data[1] ^ data[2] ^ data[3]) == data[4])) { 
+				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))) { 
+				sniffState = SNF_SAK;
+			}
+			break;
+		}
+		case SNF_SAK:{
+			if ((!reader) && (len == 3) && (CheckCrc14443(CRC_14443_A, data, 3))) { 
+				sniffSAK = data[0];
+				if (sniffUID[3] == 0x88) {
+					sniffState = SNF_ANTICOL2;
+				} else {
+					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);
+				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))) { 
+				sniffState = SNF_SAK;
+	Dbprintf("SNF_SAK");				
+			}
+			break;
+		}
+		case SNF_CARD_IDLE:{
+			sniffBuf[0] = 0xFF;
+			sniffBuf[1] = 0xFF;
+			memcpy(sniffBuf + 2, sniffUID, 7);
+			memcpy(sniffBuf + 9, sniffATQA, 2);
+			sniffBuf[11] = sniffSAK;
+			sniffBuf[12] = 0xFF;
+			sniffBuf[13] = 0xFF;
+			LogTrace(sniffBuf, 14, 0, 0, true);
+			timerData = GetTickCount();
+		}
+		case SNF_CARD_CMD:{
+			LogTrace(data, len, 0, 0, true);
+
+			sniffState = SNF_CARD_RESP;
+			timerData = GetTickCount();
+			break;
+		}
+		case SNF_CARD_RESP:{
+			LogTrace(data, len, 0, 0, false);
+
+			sniffState = SNF_CARD_CMD;
+			timerData = GetTickCount();
+			break;
+		}
+	
+		default:
+			sniffState = SNF_INIT;
+		break;
+	}
+
+	return 0;
+}
+
+int RAMFUNC MfSniffSend(int maxTimeoutMs) {
+	if (traceLen && (timerData + maxTimeoutMs < GetTickCount())) {
+		return intMfSniffSend();
+	}
+	return 0;
+}
+
+// internal seding function. not a RAMFUNC.
+int intMfSniffSend() {
+	
+	int pckSize = 0;
+	int pckLen = traceLen;
+	int pckNum = 0;
+	
+	if (!traceLen) return 0;
+
+	AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS;
+
+	while (pckLen > 0) {
+		pckSize = min(32, pckLen);
+		UsbCommand ack = {CMD_ACK, {1, pckSize, pckNum}};
+		memcpy(ack.d.asBytes, trace + traceLen - pckLen, pckSize);
+	
+		LED_B_ON();
+		UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand));
+		SpinDelay(20);
+		LED_B_OFF();
+
+		pckLen -= pckSize;
+		pckNum++;
+	}
+
+	UsbCommand ack = {CMD_ACK, {2, 0, 0}};
+
+	LED_B_ON();
+	UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand));
+	LED_B_OFF();
+
+	traceLen = 0;
+	memset(trace, 0x44, TRACE_SIZE);
+	
+	return 1;
+}