From: merlokk <olegmsn@gmail.com>
Date: Thu, 9 Nov 2017 14:39:40 +0000 (+0200)
Subject: changed iso14aapdu arm side and client
X-Git-Tag: v3.1.0~133^2~2
X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/commitdiff_plain/b7d3e89923d418c8a7b6acf1ca74f45b436be26d?ds=inline;hp=--cc

changed iso14aapdu arm side and client
---

b7d3e89923d418c8a7b6acf1ca74f45b436be26d
diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c
index 90e8538e..45425e07 100644
--- a/armsrc/iso14443a.c
+++ b/armsrc/iso14443a.c
@@ -12,10 +12,11 @@
 
 #include "iso14443a.h"
 
+#include <stdio.h>
+#include <string.h>
 #include "proxmark3.h"
 #include "apps.h"
 #include "util.h"
-#include "string.h"
 #include "cmd.h"
 #include "iso14443crc.h"
 #include "crapto1/crapto1.h"
@@ -1873,29 +1874,47 @@ void iso14443a_setup(uint8_t fpga_minor_mode) {
 
 int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data) {
 	uint8_t parity[MAX_PARITY_SIZE];
-	uint8_t real_cmd[cmd_len+4];
-	real_cmd[0] = 0x0a; //I-Block
+	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;
-	real_cmd[1] = 0x00; //CID: 0 //FIXME: allow multiple selected cards
-	memcpy(real_cmd+2, cmd, cmd_len);
-	AppendCrc14443a(real_cmd,cmd_len+2);
+	memcpy(real_cmd + 1, cmd, cmd_len);
+	AppendCrc14443a(real_cmd, cmd_len + 1);
  
-	ReaderTransmit(real_cmd, cmd_len+4, NULL);
+	ReaderTransmit(real_cmd, cmd_len + 3, NULL);
+
 	size_t len = ReaderReceive(data, parity);
 	uint8_t *data_bytes = (uint8_t *) data;
-	if (!len)
+
+	if (!len) {
 		return 0; //DATA LINK ERROR
+		
 	// if we received an I- or R(ACK)-Block with a block number equal to the
 	// current block number, toggle the current block number
-	else if (len >= 4 // PCB+CID+CRC = 4 bytes
+	} else{
+		if (len >= 3 // PCB+CRC = 3 bytes
 	         && ((data_bytes[0] & 0xC0) == 0 // I-Block
 	             || (data_bytes[0] & 0xD0) == 0x80) // R-Block with ACK bit set to 0
 	         && (data_bytes[0] & 0x01) == iso14_pcb_blocknum) // equal block numbers
-	{
-		iso14_pcb_blocknum ^= 1;
-	}
+		{
+			iso14_pcb_blocknum ^= 1;
+		}
 
+		// crc check
+		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];
+	
 	return len;
 }
 
@@ -1952,7 +1971,7 @@ void ReaderIso14443a(UsbCommand *c)
 	if(param & ISO14A_APDU && !cantSELECT) {
 		arg0 = iso14_apdu(cmd, len, buf);
 		LED_B_ON();
-		cmd_send(CMD_ACK,arg0,0,0,buf,sizeof(buf));
+		cmd_send(CMD_ACK, arg0, 0, 0, buf, sizeof(buf));
 		LED_B_OFF();
 	}
 
diff --git a/client/cmdhf14a.c b/client/cmdhf14a.c
index c2d12fd9..18e13794 100644
--- a/client/cmdhf14a.c
+++ b/client/cmdhf14a.c
@@ -634,87 +634,73 @@ int CmdHF14ASnoop(const char *Cmd) {
 	return 0;
 }
 
+void DropField() {
+	UsbCommand c = {CMD_READER_ISO_14443a, {0, 0, 0}}; 
+	SendCommand(&c);
+}
+
 int ExchangeAPDU14a(uint8_t *datain, int datainlen, bool activateField, bool leaveSignalON, uint8_t *dataout, int *dataoutlen) {
-	uint8_t data[USB_CMD_DATA_SIZE];
-	int datalen;
 	uint16_t cmdc = 0;
-	uint8_t first, second;
-	static uint8_t iso14_pcb_blocknum;
 	
 	if (activateField) {
 		cmdc |= ISO14A_CONNECT | ISO14A_CLEAR_TRACE;
-		iso14_pcb_blocknum = 0;
 	}
 	if (leaveSignalON)
 		cmdc |= ISO14A_NO_DISCONNECT;
 
-	// ISO 14443 APDU frame: PCB [CID] [NAD] APDU CRC PCB=0x02
-	memcpy(data + 1, datain, datainlen);
-	data[0] = 0x02; // bnr,nad,cid,chn=0; i-block(0x00)	
-	data[0] += iso14_pcb_blocknum; // add block number (bnr)
-
-	datalen = datainlen + 1;
-	
-	ComputeCrc14443(CRC_14443_A, data, datalen, &first, &second);
-	data[datalen++] = first;
-	data[datalen++] = second;
-
 	// "Command APDU" length should be 5+255+1, but javacard's APDU buffer might be smaller - 133 bytes
 	// https://stackoverflow.com/questions/32994936/safe-max-java-card-apdu-data-command-and-respond-size
 	// here length USB_CMD_DATA_SIZE=512
 	// timeout timeout14a * 1.06 / 100, true, size, &keyBlock[6 * c], e_sector); // timeout is (ms * 106)/10 or us*0.0106
-	UsbCommand c = {CMD_READER_ISO_14443a, {ISO14A_RAW | ISO14A_SET_TIMEOUT | cmdc, (datalen & 0xFFFF), 1000 * 1000 * 1.06 / 100}}; 
-	memcpy(c.d.asBytes, data, datalen);
+	UsbCommand c = {CMD_READER_ISO_14443a, {ISO14A_APDU | ISO14A_SET_TIMEOUT | cmdc, (datainlen & 0xFFFF), 1000 * 1000 * 1.06 / 100}}; 
+	memcpy(c.d.asBytes, datain, datainlen);
 	SendCommand(&c);
 	
     uint8_t *recv;
     UsbCommand resp;
 
 	if (activateField) {
-		if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)) 
+		if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {
+			PrintAndLog("APDU ERROR: Proxmark connection timeout.");
 			return 1;
-		if (resp.arg[0] != 1)
+		}
+		if (resp.arg[0] != 1) {
+			PrintAndLog("APDU ERROR: Proxmark error %d.", resp.arg[0]);
 			return 1;
+		}
 	}
 
     if (WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {
         recv = resp.d.asBytes;
-        uint8_t iLen = resp.arg[0];
+        int iLen = resp.arg[0];
 		
-		*dataoutlen = iLen - 1 - 2;
+		*dataoutlen = iLen - 2;
 		if (*dataoutlen < 0)
 			*dataoutlen = 0;
-		memcpy(dataout, recv + 1, *dataoutlen);
+		memcpy(dataout, recv, *dataoutlen);
 		
-        if(!iLen)
+        if(!iLen) {
+			PrintAndLog("APDU ERROR: No APDU response.");
             return 1;
-
-		// check apdu length
-		if (iLen < 5) {
-			PrintAndLog("APDU ERROR: Small APDU response.");
-			return 2;
 		}
 
-		// invert block number field in PCB byte
-		if ( ((recv[0] & 0xC0) == 0 // I-Block
-			   || (recv[0] & 0xD0) == 0x80) // R-Block with ACK bit set to 0
-			 && (recv[0] & 0x01) == iso14_pcb_blocknum) // equal block numbers
-		{
-			iso14_pcb_blocknum ^= 1;
-		}
-		
-		// check block
-		if (data[0] != recv[0]) {
-			PrintAndLog("APDU ERROR: Block type mismatch: %02x-%02x", data[0], recv[0]);
+		// check block TODO
+		if (iLen == -2) {
+			PrintAndLog("APDU ERROR: Block type mismatch.");
 			return 2;
 		}
 		
 		// CRC Check
-		ComputeCrc14443(CRC_14443_A, recv, iLen, &first, &second);
-		if (first || second) {
+		if (iLen == -1) {
 			PrintAndLog("APDU ERROR: ISO 14443A CRC error.");
 			return 3;
 		}
+
+		// check apdu length
+		if (iLen < 4) {
+			PrintAndLog("APDU ERROR: Small APDU response. Len=%d", iLen);
+			return 2;
+		}
 		
     } else {
         PrintAndLog("APDU ERROR: Reply timeout.");
@@ -782,23 +768,12 @@ int CmdHF14AAPDU(const char *cmd) {
 		cmdp++;
 	}
 
-	PrintAndLog("--%s %s %s >>>> %s", activateField ? "sel": "", leaveSignalON ? "keep": "", decodeTLV ? "TLV": "", sprint_hex(data, datalen));
+	PrintAndLog(">>>>[%s%s%s] %s", activateField ? "sel ": "", leaveSignalON ? "keep ": "", decodeTLV ? "TLV": "", sprint_hex(data, datalen));
 	
-	switch(ExchangeAPDU14a(data, datalen, activateField, leaveSignalON, data, &datalen)) {
-		case 0:
-			break;
-		case 1:
-			PrintAndLog("APDU ERROR: Send APDU error.");
-			return 1;
-		case 2:
-			return 2;
-		case 3:
-			return 3;
-		case 4:
-			return 4;
-		default:
-			return 5;
-	}
+	int res = ExchangeAPDU14a(data, datalen, activateField, leaveSignalON, data, &datalen);
+
+	if (res)
+		return res;
 
 	PrintAndLog("<<<< %s", sprint_hex(data, datalen));
 	
diff --git a/client/cmdhf14a.h b/client/cmdhf14a.h
index e7784de2..5276da36 100644
--- a/client/cmdhf14a.h
+++ b/client/cmdhf14a.h
@@ -35,6 +35,7 @@ int CmdHF14ASim(const char *Cmd);
 int CmdHF14ASnoop(const char *Cmd);
 char* getTagInfo(uint8_t uid);
 
+extern void DropField();
 extern int ExchangeAPDU14a(uint8_t *datain, int datainlen, bool activateField, bool leaveSignalON, uint8_t *dataout, int *dataoutlen);
 
 #endif