X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/16cdfa6355e0eb1a8bd8879727249518fdb8be39..c719d385ef376c848eb881565af23a8e304362d7:/armsrc/iso14443a.c

diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c
index 059db71e..50160798 100644
--- a/armsrc/iso14443a.c
+++ b/armsrc/iso14443a.c
@@ -1220,7 +1220,7 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
 			EmSendPrecompiledCmd(p_response);
 		}
 		
-		if (!tracing) {
+		if (!get_tracing()) {
 			Dbprintf("Trace Full. Simulation stopped.");
 			break;
 		}
@@ -1619,9 +1619,7 @@ void ReaderTransmitBitsPar(uint8_t* frame, uint16_t bits, uint8_t *par, uint32_t
 		LED_A_ON();
   
 	// Log reader command in trace buffer
-	if (tracing) {
-		LogTrace(frame, nbytes(bits), LastTimeProxToAirStart*16 + DELAY_ARM2AIR_AS_READER, (LastTimeProxToAirStart + LastProxToAirDuration)*16 + DELAY_ARM2AIR_AS_READER, par, true);
-	}
+	LogTrace(frame, nbytes(bits), LastTimeProxToAirStart*16 + DELAY_ARM2AIR_AS_READER, (LastTimeProxToAirStart + LastProxToAirDuration)*16 + DELAY_ARM2AIR_AS_READER, par, true);
 }
 
 
@@ -1652,9 +1650,7 @@ void ReaderTransmit(uint8_t* frame, uint16_t len, uint32_t *timing)
 static int ReaderReceiveOffset(uint8_t* receivedAnswer, uint16_t offset, uint8_t *parity)
 {
 	if (!GetIso14443aAnswerFromTag(receivedAnswer, parity, offset)) return false;
-	if (tracing) {
-		LogTrace(receivedAnswer, Demod.len, Demod.startTime*16 - DELAY_AIR2ARM_AS_READER, Demod.endTime*16 - DELAY_AIR2ARM_AS_READER, parity, false);
-	}
+	LogTrace(receivedAnswer, Demod.len, Demod.startTime*16 - DELAY_AIR2ARM_AS_READER, Demod.endTime*16 - DELAY_AIR2ARM_AS_READER, parity, false);
 	return Demod.len;
 }
 
@@ -1662,9 +1658,7 @@ static int ReaderReceiveOffset(uint8_t* receivedAnswer, uint16_t offset, uint8_t
 int ReaderReceive(uint8_t *receivedAnswer, uint8_t *parity)
 {
 	if (!GetIso14443aAnswerFromTag(receivedAnswer, parity, 0)) return false;
-	if (tracing) {
-		LogTrace(receivedAnswer, Demod.len, Demod.startTime*16 - DELAY_AIR2ARM_AS_READER, Demod.endTime*16 - DELAY_AIR2ARM_AS_READER, parity, false);
-	}
+	LogTrace(receivedAnswer, Demod.len, Demod.startTime*16 - DELAY_AIR2ARM_AS_READER, Demod.endTime*16 - DELAY_AIR2ARM_AS_READER, parity, false);
 	return Demod.len;
 }
 
@@ -1935,15 +1929,21 @@ b8 b7 b6 b5 b4 b3 b2 b1
 b5,b6 = 00 - DESELECT
         11 - WTX 
 */    
-int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data) {
+int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data, uint8_t *res) {
 	uint8_t parity[MAX_PARITY_SIZE];
 	uint8_t real_cmd[cmd_len + 4];
 	
-	// ISO 14443 APDU frame: PCB [CID] [NAD] APDU CRC PCB=0x02
-	real_cmd[0] = 0x02; // bnr,nad,cid,chn=0; i-block(0x00)	
-	// put block number into the PCB
-	real_cmd[0] |= iso14_pcb_blocknum;
-	memcpy(real_cmd + 1, cmd, cmd_len);
+	if (cmd_len) {
+		// ISO 14443 APDU frame: PCB [CID] [NAD] APDU CRC PCB=0x02
+		real_cmd[0] = 0x02; // bnr,nad,cid,chn=0; i-block(0x00)	
+		// put block number into the PCB
+		real_cmd[0] |= iso14_pcb_blocknum;
+		memcpy(real_cmd + 1, cmd, cmd_len);
+	} else {
+		// R-block. ACK
+		real_cmd[0] = 0xA2; // r-block + ACK	
+		real_cmd[0] |= iso14_pcb_blocknum;
+	}
 	AppendCrc14443a(real_cmd, cmd_len + 1);
  
 	ReaderTransmit(real_cmd, cmd_len + 3, NULL);
@@ -1955,7 +1955,7 @@ int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data) {
 		return 0; //DATA LINK ERROR
 	} else{
 		// S-Block WTX 
-		while((data_bytes[0] & 0xF2) == 0xF2) {
+		while(len && ((data_bytes[0] & 0xF2) == 0xF2)) {
 			uint32_t save_iso14a_timeout = iso14a_get_timeout();
 			// temporarily increase timeout
 			iso14a_set_timeout(MAX((data_bytes[1] & 0x3f) * save_iso14a_timeout, MAX_ISO14A_TIMEOUT));
@@ -1982,20 +1982,26 @@ int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data) {
 		{
 			iso14_pcb_blocknum ^= 1;
 		}
+		
+		// if we received I-block with chaining we need to send ACK and receive another block of data
+		if (res)
+			*res = data_bytes[0];
 
 		// crc check
-		if (len >=3 && !CheckCrc14443(CRC_14443_A, data_bytes, len)) {
+		if (len >= 3 && !CheckCrc14443(CRC_14443_A, data_bytes, len)) {
 			return -1;
 		}
 		
 	}
 	
-	// cut frame byte
-	len -= 1;
-	// memmove(data_bytes, data_bytes + 1, len);
-	for (int i = 0; i < len; i++)
-		data_bytes[i] = data_bytes[i + 1];
-	
+	if (len) {
+		// cut frame byte
+		len -= 1;
+		// memmove(data_bytes, data_bytes + 1, len);
+		for (int i = 0; i < len; i++)
+			data_bytes[i] = data_bytes[i + 1];
+	}
+		
 	return len;
 }
 
@@ -2050,9 +2056,10 @@ void ReaderIso14443a(UsbCommand *c)
 	}
 
 	if(param & ISO14A_APDU && !cantSELECT) {
-		arg0 = iso14_apdu(cmd, len, buf);
+		uint8_t res;
+		arg0 = iso14_apdu(cmd, len, buf, &res);
 		LED_B_ON();
-		cmd_send(CMD_ACK, arg0, 0, 0, buf, sizeof(buf));
+		cmd_send(CMD_ACK, arg0, res, 0, buf, sizeof(buf));
 		LED_B_OFF();
 	}