X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/e464f6225860a0965e266732328d9d0948607c31..91e03840f4af4d7f352b9241044d991ac546193e:/client/cmdhf14a.c?ds=sidebyside

diff --git a/client/cmdhf14a.c b/client/cmdhf14a.c
index 24a66b88..8064724c 100644
--- a/client/cmdhf14a.c
+++ b/client/cmdhf14a.c
@@ -132,28 +132,27 @@ int CmdHF14AList(const char *Cmd)
 
 int CmdHF14AReader(const char *Cmd) {
 	uint32_t cm = ISO14A_CONNECT;
-	bool disconnectAfter = false;
+	bool disconnectAfter = true;
 	
 	int cmdp = 0;
 	while(param_getchar(Cmd, cmdp) != 0x00) {
 		switch(param_getchar(Cmd, cmdp)) {
 		case 'h':
 		case 'H':
-			PrintAndLog("Usage: hf 14a reader [d] [3]");
-			PrintAndLog("       d    drop the signal field after command executed");
+			PrintAndLog("Usage: hf 14a reader [k|x] [3]");
+			PrintAndLog("       k    keep the field active after command executed");
 			PrintAndLog("       x    just drop the signal field");
 			PrintAndLog("       3    ISO14443-3 select only (skip RATS)");
 			return 0;
 		case '3':
 			cm |= ISO14A_NO_RATS; 
 			break;
-		case 'd':
-		case 'D':
-			disconnectAfter = true;
+		case 'k':
+		case 'K':
+			disconnectAfter = false;
 			break;
 		case 'x':
 		case 'X':
-			disconnectAfter = true;
 			cm = cm - ISO14A_CONNECT;
 			break;
 		default:
@@ -196,10 +195,15 @@ int CmdHF14AReader(const char *Cmd) {
 		if(card.ats_len >= 3) {			// a valid ATS consists of at least the length byte (TL) and 2 CRC bytes
 			PrintAndLog(" ATS : %s", sprint_hex(card.ats, card.ats_len));
 		}
-		PrintAndLog("Card is selected. You can now start sending commands");
-	} else {
+		if (!disconnectAfter) {
+			PrintAndLog("Card is selected. You can now start sending commands");
+		}
+	}
+
+	if (disconnectAfter) {
 		PrintAndLog("Field dropped.");
 	}
+	
 	return 0;
 }
 
@@ -644,7 +648,7 @@ void DropField() {
 	SendCommand(&c);
 }
 
-int ExchangeAPDU14a(uint8_t *datain, int datainlen, bool activateField, bool leaveSignalON, uint8_t *dataout, int *dataoutlen) {
+int ExchangeAPDU14a(uint8_t *datain, int datainlen, bool activateField, bool leaveSignalON, uint8_t *dataout, int maxdataoutlen, int *dataoutlen) {
 	uint16_t cmdc = 0;
 	
 	if (activateField) {
@@ -656,8 +660,8 @@ int ExchangeAPDU14a(uint8_t *datain, int datainlen, bool activateField, bool lea
 	// "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_APDU | ISO14A_SET_TIMEOUT | cmdc, (datainlen & 0xFFFF), 1000 * 1000 * 1.06 / 100}}; 
+	// timeout must be authomatically set by "get ATS"
+	UsbCommand c = {CMD_READER_ISO_14443a, {ISO14A_APDU | cmdc, (datainlen & 0xFFFF), 0}}; 
 	memcpy(c.d.asBytes, datain, datainlen);
 	SendCommand(&c);
 	
@@ -682,6 +686,12 @@ int ExchangeAPDU14a(uint8_t *datain, int datainlen, bool activateField, bool lea
 		*dataoutlen = iLen - 2;
 		if (*dataoutlen < 0)
 			*dataoutlen = 0;
+		
+		if (maxdataoutlen && *dataoutlen > maxdataoutlen) {
+			PrintAndLog("APDU ERROR: Buffer too small(%d). Needs %d bytes", *dataoutlen, maxdataoutlen);
+			return 2;
+		}
+		
 		memcpy(dataout, recv, *dataoutlen);
 		
         if(!iLen) {
@@ -715,6 +725,7 @@ int ExchangeAPDU14a(uint8_t *datain, int datainlen, bool activateField, bool lea
 	return 0;
 }
 
+// ISO14443-4. 7. Half-duplex block transmission protocol
 int CmdHF14AAPDU(const char *cmd) {
 	uint8_t data[USB_CMD_DATA_SIZE];
 	int datalen = 0;
@@ -724,6 +735,7 @@ int CmdHF14AAPDU(const char *cmd) {
 	
 	if (strlen(cmd) < 2) {
 		PrintAndLog("Usage: hf 14a apdu [-s] [-k] [-t] <APDU (hex)>");
+		PrintAndLog("Command sends an ISO 7816-4 APDU via ISO 14443-4 block transmission protocol (T=CL)");
 		PrintAndLog("       -s    activate field and select card");
 		PrintAndLog("       -k    leave the signal field ON after receive response");
 		PrintAndLog("       -t    executes TLV decoder if it possible. TODO!!!!");
@@ -775,7 +787,7 @@ int CmdHF14AAPDU(const char *cmd) {
 
 	PrintAndLog(">>>>[%s%s%s] %s", activateField ? "sel ": "", leaveSignalON ? "keep ": "", decodeTLV ? "TLV": "", sprint_hex(data, datalen));
 	
-	int res = ExchangeAPDU14a(data, datalen, activateField, leaveSignalON, data, &datalen);
+	int res = ExchangeAPDU14a(data, datalen, activateField, leaveSignalON, data, USB_CMD_DATA_SIZE, &datalen);
 
 	if (res)
 		return res;
@@ -1009,7 +1021,7 @@ static command_t CommandTable[] =
   {"cuids",  CmdHF14ACUIDs,        0, "<n> Collect n>0 ISO14443 Type A UIDs in one go"},
   {"sim",    CmdHF14ASim,          0, "<UID> -- Simulate ISO 14443a tag"},
   {"snoop",  CmdHF14ASnoop,        0, "Eavesdrop ISO 14443 Type A"},
-  {"apdu",   CmdHF14AAPDU,         0, "Send ISO 1443-4 APDU to tag"},
+  {"apdu",   CmdHF14AAPDU,         0, "Send an ISO 7816-4 APDU via ISO 14443-4 block transmission protocol"},
   {"raw",    CmdHF14ACmdRaw,       0, "Send raw hex data to tag"},
   {NULL, NULL, 0, NULL}
 };