Merge pull request #86 from merlokk/14a_apdu_send_framing2

14a apdu send framing

armsrc/epa.c

@@ -108,7 +108,7 @@ int EPA_APDU(uint8_t *apdu, size_t length, uint8_t *response)
 	switch(iso_type)
 	{
 		case 'a':
-			return iso14_apdu(apdu, (uint16_t) length, response, NULL);
+			return iso14_apdu(apdu, (uint16_t) length, false, response, NULL);
 			break;
 		case 'b':
 			return iso14443b_apdu(apdu, length, response);

armsrc/iso14443a.c

@@ -2219,13 +2219,16 @@ 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, uint8_t *res) {
+int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, bool send_chaining, void *data, uint8_t *res) {
 	uint8_t parity[MAX_PARITY_SIZE] = {0x00};
 	uint8_t real_cmd[cmd_len + 4];
 	
 	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)	
+		if (send_chaining) {
+			real_cmd[0] |= 0x10;
+		}
 		// put block number into the PCB
 		real_cmd[0] |= iso14_pcb_blocknum;
 		memcpy(real_cmd + 1, cmd, cmd_len);
@@ -2338,7 +2341,7 @@ void ReaderIso14443a(UsbCommand *c) {
 
 	if ((param & ISO14A_APDU)) {
 		uint8_t res;
-		arg0 = iso14_apdu(cmd, len, buf, &res);
+		arg0 = iso14_apdu(cmd, len, (param & ISO14A_SEND_CHAINING), buf, &res);
 		cmd_send(CMD_ACK, arg0, res, 0, buf, sizeof(buf));
 	}
 

armsrc/iso14443a.h

@@ -114,7 +114,7 @@ extern void ReaderTransmitPar(uint8_t *frame, uint16_t len, uint8_t *par, uint32
 extern int ReaderReceive(uint8_t *receivedAnswer, uint8_t *par);
 
 extern void iso14443a_setup(uint8_t fpga_minor_mode);
-extern int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data, uint8_t *res);
+extern int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, bool send_chaining, void *data, uint8_t *res);
 extern int iso14443a_select_card(uint8_t *uid_ptr, iso14a_card_select_t *resp_data, uint32_t *cuid_ptr, bool anticollision, uint8_t num_cascades, bool no_rats);
 extern int iso14443a_fast_select_card(uint8_t *uid_ptr, uint8_t num_cascades);
 extern void iso14a_set_trigger(bool enable);

client/cmdhf14a.c

@@ -1,6 +1,6 @@
 //-----------------------------------------------------------------------------
 // Copyright (C) 2010 iZsh <izsh at fail0verflow.com>, Hagen Fritsch
-// 2011, 2017 Merlok
+// 2011, 2017 - 2019 Merlok
 // 2014, Peter Fillmore
 // 2015, 2016, 2017 Iceman
 //
@@ -12,6 +12,8 @@
 //-----------------------------------------------------------------------------
 #include "cmdhf14a.h"
 
+bool APDUInFramingEnable = true;
+
 static int CmdHelp(const char *Cmd);
 static int waitCmd(uint8_t iLen);
 
@@ -147,6 +149,10 @@ char* getTagInfo(uint8_t uid) {
 	return manufactureMapping[len-1].desc; 
 }
 
+// iso14a apdu input frame length
+static uint16_t frameLength = 0;
+uint16_t atsFSC[] = {16, 24, 32, 40, 48, 64, 96, 128, 256};
+
 int usage_hf_14a_sim(void) {
 //	PrintAndLogEx(NORMAL, "\n Emulating ISO/IEC 14443 type A tag with 4,7 or 10 byte UID\n");
 	PrintAndLogEx(NORMAL, "\n Emulating ISO/IEC 14443 type A tag with 4,7 byte UID\n");
@@ -486,10 +492,7 @@ int CmdHF14AInfo(const char *Cmd) {
 				(tb1 ? "" : " NOT"),
 				(tc1 ? "" : " NOT"),
 				fsci,
-				fsci < 5 ? (fsci - 2) * 8 : 
+				fsci < sizeof(atsFSC) ? atsFSC[fsci] : -1
-					fsci < 8 ? (fsci - 3) * 32 :
-					fsci == 8 ? 256 :
-					-1
 				);
 		}
 		pos = 2;
@@ -836,15 +839,90 @@ int ExchangeRAW14a(uint8_t *datain, int datainlen, bool activateField, bool leav
 	return 0;
 }
 
-int CmdExchangeAPDU(uint8_t *datain, int datainlen, bool activateField, uint8_t *dataout, int maxdataoutlen, int *dataoutlen, bool *chaining) {
+int SelectCard14443_4(bool disconnect, iso14a_card_select_t *card) {
-	uint16_t cmdc = 0;
+    UsbCommand resp;
 
-	*chaining = false;
+	frameLength = 0;
+
+	if (card)
+		memset(card, 0, sizeof(iso14a_card_select_t));
+	
+	DropField();	
+
+	// Anticollision + SELECT card
+	UsbCommand ca = {CMD_READER_ISO_14443a, {ISO14A_CONNECT | ISO14A_NO_DISCONNECT, 0, 0}};
+	SendCommand(&ca);
+	if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {
+		PrintAndLogEx(ERR, "Proxmark connection timeout.");
+		return 1;
+	}
+
+	// check result
+	if (resp.arg[0] == 0) {
+		PrintAndLogEx(ERR, "No card in field.");
+		return 1;
+	}
+
+	if (resp.arg[0] != 1 && resp.arg[0] != 2) {
+		PrintAndLogEx(ERR, "Card not in iso14443-4. res=%d.", resp.arg[0]);
+		return 1;
+	}
+
+	if (resp.arg[0] == 2) {		// 0: couldn't read, 1: OK, with ATS, 2: OK, no ATS, 3: proprietary Anticollision
+		// get ATS 
+		UsbCommand cr = {CMD_READER_ISO_14443a, {ISO14A_RAW | ISO14A_APPEND_CRC | ISO14A_NO_DISCONNECT, 2, 0}}; 
+		uint8_t rats[] = { 0xE0, 0x80 }; // FSDI=8 (FSD=256), CID=0
+		memcpy(cr.d.asBytes, rats, 2);
+		SendCommand(&cr);
+		if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {
+			PrintAndLogEx(ERR, "Proxmark connection timeout.");
+			return 1;
+		}
+		
+		if (resp.arg[0] <= 0) { // ats_len
+			PrintAndLogEx(ERR, "Can't get ATS.");
+			return 1;
+		}
+
+		// get frame length from ATS in data field
+		if (resp.arg[0] > 1) {
+			uint8_t fsci = resp.d.asBytes[1] & 0x0f;
+			if (fsci < sizeof(atsFSC))
+				frameLength = atsFSC[fsci];
+		}
+	} else {
+		// get frame length from ATS in card data structure
+		iso14a_card_select_t *vcard = (iso14a_card_select_t *) resp.d.asBytes;
+		if (vcard->ats_len > 1) {
+			uint8_t fsci = vcard->ats[1] & 0x0f;
+			if (fsci < sizeof(atsFSC))
+				frameLength = atsFSC[fsci];
+		}
+		
+		if (card)
+			memcpy(card, vcard, sizeof(iso14a_card_select_t));
+	}
+	
+	if (disconnect)
+		DropField();	
+
+	return 0;
+}
+
+int CmdExchangeAPDU(bool chainingin, uint8_t *datain, int datainlen, bool activateField, uint8_t *dataout, int maxdataoutlen, int *dataoutlen, bool *chainingout) {
+	*chainingout = false;
 	
 	if (activateField) {
-		cmdc |= ISO14A_CONNECT;
+		// select with no disconnect and set frameLength
+		int selres = SelectCard14443_4(false, NULL);
+		if (selres)
+			return selres;
 	}
 	
+	uint16_t cmdc = 0;
+	if (chainingin)
+		cmdc = ISO14A_SEND_CHAINING;
+	
 	// "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
@@ -856,18 +934,6 @@ int CmdExchangeAPDU(uint8_t *datain, int datainlen, bool activateField, uint8_t
     uint8_t *recv;
     UsbCommand resp;
 
-	if (activateField) {
-		if (!WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {
-			PrintAndLogEx(ERR, "APDU: Proxmark connection timeout.");
-			return 1;
-		}
-		if (resp.arg[0] != 1) {
-			PrintAndLogEx(ERR, "APDU: Proxmark error %d.", resp.arg[0]);
-			DropField();
-			return 1;
-		}
-	}
-
     if (WaitForResponseTimeout(CMD_ACK, &resp, 1500)) {
         recv = resp.d.asBytes;
         int iLen = resp.arg[0];
@@ -883,13 +949,20 @@ int CmdExchangeAPDU(uint8_t *datain, int datainlen, bool activateField, uint8_t
 			return 2;
 		}
 		
+		// I-block ACK
+		if ((res & 0xf2) == 0xa2) {
+			*dataoutlen = 0;
+			*chainingout = true;
+			return 0;
+		}
+		
         if(!iLen) {
 			PrintAndLogEx(ERR, "APDU: No APDU response.");
             return 1;
 		}
 
 		// check apdu length
-		if (iLen < 4 && iLen >= 0) {
+		if (iLen < 2 && iLen >= 0) {
 			PrintAndLogEx(ERR, "APDU: Small APDU response. Len=%d", iLen);
 			return 2;
 		}
@@ -904,7 +977,7 @@ int CmdExchangeAPDU(uint8_t *datain, int datainlen, bool activateField, uint8_t
 		
 		// chaining
 		if ((res & 0x10) != 0) {
-			*chaining = true;
+			*chainingout = true;
 		}
 		
 		// CRC Check
@@ -923,12 +996,57 @@ int CmdExchangeAPDU(uint8_t *datain, int datainlen, bool activateField, uint8_t
 int ExchangeAPDU14a(uint8_t *datain, int datainlen, bool activateField, bool leaveSignalON, uint8_t *dataout, int maxdataoutlen, int *dataoutlen) {
 	*dataoutlen = 0;
 	bool chaining = false;
+	int res;
 
-	int res = CmdExchangeAPDU(datain, datainlen, activateField, dataout, maxdataoutlen, dataoutlen, &chaining);
+	// 3 byte here - 1b framing header, 2b crc16
+	if (APDUInFramingEnable && 
+		( (frameLength && (datainlen > frameLength - 3)) || (datainlen > USB_CMD_DATA_SIZE - 3)) ) {
+		int clen = 0;
+		
+		bool vActivateField = activateField;
+		
+		do {
+			int vlen = MIN(frameLength - 3, datainlen - clen);
+			bool chainBlockNotLast = ((clen + vlen) < datainlen);
+
+			*dataoutlen = 0;
+			res = CmdExchangeAPDU(chainBlockNotLast, &datain[clen], vlen, vActivateField, dataout, maxdataoutlen, dataoutlen, &chaining);
+			if (res) {
+				if (!leaveSignalON)
+					DropField();
+
+				return 200;
+			}
+
+			// check R-block ACK
+			if ((*dataoutlen == 0) && (*dataoutlen != 0 || chaining != chainBlockNotLast)) {
+				if (!leaveSignalON)
+					DropField();
+				
+				return 201;
+			}
+			
+			clen += vlen;
+			vActivateField = false;
+			if (*dataoutlen) {
+				if (clen != datainlen)
+					PrintAndLogEx(WARNING, "APDU: I-block/R-block sequence error. Data len=%d, Sent=%d, Last packet len=%d", datainlen, clen, *dataoutlen);
+				break;
+			}
+		} while (clen < datainlen);		
+	} else {
+		res = CmdExchangeAPDU(false, datain, datainlen, activateField, dataout, maxdataoutlen, dataoutlen, &chaining);
+		if (res) {
+			if (!leaveSignalON)
+				DropField();
+			
+			return res;
+		}
+	}
 	
 	while (chaining) {
 		// I-block with chaining
-		res = CmdExchangeAPDU(NULL, 0, false, &dataout[*dataoutlen], maxdataoutlen, dataoutlen, &chaining);
+		res = CmdExchangeAPDU(false, NULL, 0, false, &dataout[*dataoutlen], maxdataoutlen, dataoutlen, &chaining);
 		
 		if (res) {
 			if (!leaveSignalON)
@@ -1205,16 +1323,48 @@ int CmdHF14AAntiFuzz(const char *cmd) {
 	return 0;
 }
 
+int CmdHF14AChaining(const char *cmd) {
+	
+	CLIParserInit("hf 14a chaining", 
+		"Enable/Disable ISO14443a input chaining. Maximum input length goes from ATS.", 
+		"Usage:\n"
+		"\thf 14a chaining disable -> disable chaining\n"
+		"\thf 14a chaining         -> show chaining enable/disable state\n");
+
+	void* argtable[] = {
+		arg_param_begin,
+		arg_str0(NULL, NULL,      "<enable/disable or 0/1>", NULL),
+		arg_param_end
+	};
+	CLIExecWithReturn(cmd, argtable, true);
+
+	struct arg_str *str = arg_get_str(1);
+	int len = arg_get_str_len(1);
+	
+	if (len && (!strcmp(str->sval[0], "enable") || !strcmp(str->sval[0], "1")))
+		APDUInFramingEnable = true;
+	
+	if (len && (!strcmp(str->sval[0], "disable") || !strcmp(str->sval[0], "0")))
+		APDUInFramingEnable = false;
+
+	CLIParserFree();
+
+	PrintAndLogEx(INFO, "\nISO 14443-4 input chaining %s.\n", APDUInFramingEnable ? "enabled" : "disabled");
+	
+	return 0;
+}
+
 static command_t CommandTable[] = {
 	{"help",		CmdHelp,              1, "This help"},
 	{"list",		CmdHF14AList,         0, "[Deprecated] List ISO 14443-a history"},
 	{"info",		CmdHF14AInfo,         0, "Tag information"},
-	{"reader",	CmdHF14AReader,       0, "Act like an ISO14443-a reader"},
+	{"reader",		CmdHF14AReader,       0, "Act like an ISO14443-a reader"},
 	{"cuids",		CmdHF14ACUIDs,        0, "<n> Collect n>0 ISO14443-a UIDs in one go"},
-	{"sim",		CmdHF14ASim,          0, "<UID> -- Simulate ISO 14443-a tag"},
+	{"sim",			CmdHF14ASim,          0, "<UID> -- Simulate ISO 14443-a tag"},
 	{"sniff",		CmdHF14ASniff,        0, "sniff ISO 14443-a traffic"},
 	{"apdu",		CmdHF14AAPDU,         0, "Send ISO 14443-4 APDU to tag"},
-	{"raw",		CmdHF14ACmdRaw,       0, "Send raw hex data to tag"},
+	{"chaining",	CmdHF14AChaining,     0, "Control ISO 14443-4 input chaining"},
+	{"raw",			CmdHF14ACmdRaw,       0, "Send raw hex data to tag"},
 	{"antifuzz",	CmdHF14AAntiFuzz,     0, "Fuzzing the anticollision phase.  Warning! Readers may react strange"},
 	{NULL, NULL, 0, NULL}
 };

client/fido/fidocore.c

@@ -250,9 +250,9 @@ int FIDOCheckDERAndGetKey(uint8_t *der, size_t derLen, bool verbose, uint8_t *pu
 	uint32_t verifyflags = 0;
 	res = mbedtls_x509_crt_verify(&cert, &cacert, NULL, NULL, &verifyflags, NULL, NULL);
 	if (res) {
-		PrintAndLog("ERROR: DER verify returned 0x%x - %s", (res<0)?-res:res, ecdsa_get_error(res));
+		PrintAndLog("ERROR: DER verify returned 0x%x - %s\n", (res<0)?-res:res, ecdsa_get_error(res));
 	} else {
-		PrintAndLog("Certificate OK.");
+		PrintAndLog("Certificate OK.\n");
 	}
 	
 	if (verbose) {

include/mifare.h

@@ -35,7 +35,8 @@ typedef enum ISO14A_COMMAND {
 	ISO14A_SET_TIMEOUT =		(1 << 6),
 	ISO14A_NO_SELECT =			(1 << 7),
 	ISO14A_TOPAZMODE =			(1 << 8),
-	ISO14A_NO_RATS =            (1 << 9)
+	ISO14A_NO_RATS =            (1 << 9),
+	ISO14A_SEND_CHAINING =      (1 << 10)
 } iso14a_command_t;
 
 typedef struct {