fix 'hf iclass chk'

* Check for Credidt Keys as well
* reduce authentication tries from 6 to 3
* correct text in 'hf iclass clone' for 'l' parameter
* some reformatting and whitespace fixes

armsrc/iclass.c

@@ -646,8 +646,8 @@ static void ReaderTransmitIClass(uint8_t *frame, int len, uint32_t *start_time)
 
 
 static bool sendCmdGetResponseWithRetries(uint8_t* command, size_t cmdsize, uint8_t* resp, size_t max_resp_size,
-										  uint8_t expected_size, uint8_t retries, uint32_t start_time, uint32_t timeout, uint32_t *eof_time) {
+										  uint8_t expected_size, uint8_t tries, uint32_t start_time, uint32_t timeout, uint32_t *eof_time) {
-	while (retries-- > 0) {
+	while (tries-- > 0) {
 		ReaderTransmitIClass(command, cmdsize, &start_time);
 		if (expected_size == GetIso15693AnswerFromTag(resp, max_resp_size, timeout, eof_time)) {
 			return true;
@@ -781,7 +781,7 @@ void iClass_Check(uint8_t *NRMAC) {
 	uint8_t resp[4];
 	memcpy(check+1, NRMAC, 8);
 	uint32_t eof_time;
-	bool isOK = sendCmdGetResponseWithRetries(check, sizeof(check), resp, sizeof(resp), 4, 6, 0, ICLASS_READER_TIMEOUT_OTHERS, &eof_time);
+	bool isOK = sendCmdGetResponseWithRetries(check, sizeof(check), resp, sizeof(resp), 4, 3, 0, ICLASS_READER_TIMEOUT_OTHERS, &eof_time);
 	cmd_send(CMD_ACK, isOK, 0, 0, resp, sizeof(resp));
 }
 
@@ -793,7 +793,7 @@ void iClass_Readcheck(uint8_t block, bool use_credit_key) {
 	}
 	uint8_t resp[8];
 	uint32_t eof_time;
-	bool isOK = sendCmdGetResponseWithRetries(readcheck, sizeof(readcheck), resp, sizeof(resp), 8, 6, 0, ICLASS_READER_TIMEOUT_OTHERS, &eof_time);
+	bool isOK = sendCmdGetResponseWithRetries(readcheck, sizeof(readcheck), resp, sizeof(resp), 8, 3, 0, ICLASS_READER_TIMEOUT_OTHERS, &eof_time);
 	cmd_send(CMD_ACK, isOK, 0, 0, resp, sizeof(resp));
 }
 
@@ -892,15 +892,15 @@ void iClass_WriteBlock(uint8_t blockNo, uint8_t *data) {
 
 
 void iClass_Clone(uint8_t startblock, uint8_t endblock, uint8_t *data) {
+
+	LED_A_ON();
+
 	int i;
 	int written = 0;
-	int total_block = (endblock - startblock) + 1;
+	int total_blocks = (endblock - startblock) + 1;
-	for (i = 0; i < total_block; i++) {
+
+	for (i = 0; i < total_blocks; i++) {
 		// block number
-		if (iClass_WriteBlock_ext(i+startblock, data + (i*12))){
-			Dbprintf("Write block [%02x] successful", i + startblock);
-			written++;
-		} else {
 		if (iClass_WriteBlock_ext(i+startblock, data + (i*12))){
 			Dbprintf("Write block [%02x] successful", i + startblock);
 			written++;
@@ -908,8 +908,8 @@ void iClass_Clone(uint8_t startblock, uint8_t endblock, uint8_t *data) {
 			Dbprintf("Write block [%02x] failed", i + startblock);
 		}
 	}
-	}
+
-	if (written == total_block)
+	if (written == total_blocks)
 		Dbprintf("Clone complete");
 	else
 		Dbprintf("Clone incomplete");
@@ -917,5 +917,6 @@ void iClass_Clone(uint8_t startblock, uint8_t endblock, uint8_t *data) {
 	cmd_send(CMD_ACK, 1, 0, 0, 0, 0);
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	LED_D_OFF();
+
 	LED_A_OFF();
 }

client/cmdhficlass.c

@@ -1205,7 +1205,7 @@ static void usage_hf_iclass_clone(void) {
 	PrintAndLog("Options:");
 	PrintAndLog("  f <filename>: specify a filename to clone from");
 	PrintAndLog("  b <Block>   : The first block to clone as 2 hex symbols");
-	PrintAndLog("  l <Last Blk>: Set the Data to write as 16 hex symbols");
+	PrintAndLog("  l <Last Blk>: The last block to clone as 2 hex symbols");
 	PrintAndLog("  k <Key>     : Access Key as 16 hex symbols or 1 hex to select key from memory");
 	PrintAndLog("  c           : If 'c' is specified, the key set is assumed to be the credit key\n");
 	PrintAndLog("  e           : If 'e' is specified, elite computations applied to key");
@@ -1287,7 +1287,7 @@ static int CmdHFiClassCloneTag(const char *Cmd) {
 		case 'l':
 		case 'L':
 			if (param_gethex(Cmd, cmdp+1, &endblock, 2)) {
-				PrintAndLog("Start Block No must include 2 HEX symbols\n");
+				PrintAndLog("Last Block No must include 2 HEX symbols\n");
 				errors = true;
 			}
 			cmdp += 2;
@@ -1376,12 +1376,12 @@ static int CmdHFiClassCloneTag(const char *Cmd) {
 
 	UsbCommand resp;
 	SendCommand(&w);
-	if (!WaitForResponseTimeout(CMD_ACK,&resp,4500))
+	if (!WaitForResponseTimeout(CMD_ACK,&resp,4500)) {
-	{
 		PrintAndLog("Command execute timeout");
 		DropField();
 		return 0;
 	}
+
 	return 1;
 }
 
@@ -1996,7 +1996,7 @@ static int CmdHFiClassCheckKeys(const char *Cmd) {
 	uint8_t fileNameLen = 0;
 	char buf[17];
 	uint8_t *keyBlock = NULL, *p;
-	int keyitems = 0, keycnt = 0;
+	int keycnt = 0;
 
 	while (param_getchar(Cmd, cmdp) != 0x00 && !errors) {
 		switch (param_getchar(Cmd, cmdp)) {
@@ -2036,7 +2036,7 @@ static int CmdHFiClassCheckKeys(const char *Cmd) {
 	}
 
 	if (!(f = fopen(filename , "r"))) {
-		PrintAndLog("File: %s: not found or locked.", filename);
+		PrintAndLog("File %s not found or locked.", filename);
 		return 1;
 	}
 
@@ -2055,7 +2055,7 @@ static int CmdHFiClassCheckKeys(const char *Cmd) {
 
 		buf[16] = 0;
 
-		p = realloc(keyBlock, 8 * (keyitems += 64));
+		p = realloc(keyBlock, 8 * (keycnt + 1));
 		if (!p) {
 			PrintAndLog("Cannot allocate memory for default keys");
 			free(keyBlock);
@@ -2067,60 +2067,39 @@ static int CmdHFiClassCheckKeys(const char *Cmd) {
 		memset(keyBlock + 8 * keycnt, 0, 8);
 		num_to_bytes(strtoull(buf, NULL, 16), 8, keyBlock + 8 * keycnt);
 
-		//PrintAndLog("check key[%2d] %016" PRIx64, keycnt, bytes_to_num(keyBlock + 8*keycnt, 8));
 		keycnt++;
 		memset(buf, 0, sizeof(buf));
 	}
 	fclose(f);
 	PrintAndLog("Loaded %2d keys from %s", keycnt, filename);
 
-	// time
-	uint64_t t1 = msclock();
-
 	uint8_t CSN[8];
 	if (!iClass_select(CSN, false, true, true)) {
-		PrintAndLog("Couldn't select card");
 		DropField();
 		return 0;
 	}
 
 	for (uint32_t c = 0; c < keycnt; c++) {
-		printf("."); fflush(stdout);
-		if (ukbhit()) {
-			int gc = getchar(); (void)gc;
-			printf("\naborted via keyboard!\n");
-			break;
-		}
 
 		memcpy(key, keyBlock + 8 * c, 8);
 
 		// debit key
-		if (!iClass_authenticate(CSN, key, mac, div_key, false, use_elite, use_raw, false, false))
+		if (iClass_authenticate(CSN, key, mac, div_key, false, use_elite, use_raw, false, false)) {
-			continue;
+			PrintAndLog("\n   Found AA1 debit key\t\t[%s]", sprint_hex(key, 8));
-
-		// key found.
-		PrintAndLog("\n--------------------------------------------------------");
-		PrintAndLog("   Found AA1 debit key\t\t[%s]", sprint_hex(key, 8));
 			found_debit = true;
+		}
 
 		// credit key
-		if (!iClass_authenticate(CSN, key, mac, div_key, true, use_elite, use_raw, false, false))
+		if (iClass_authenticate(CSN, key, mac, div_key, true, use_elite, use_raw, false, false)) {
-			continue;
+			PrintAndLog("\n   Found AA2 credit key\t\t[%s]", sprint_hex(key, 8));
-
-		// key found
-		PrintAndLog("\n--------------------------------------------------------");
-		PrintAndLog("   Found AA2 credit key\t\t[%s]", sprint_hex(key, 8));
 			found_credit = true;
+		}
 
 		// both keys found.
 		if (found_debit && found_credit)
 			break;
 	}
 
-	t1 = msclock() - t1;
-
-	PrintAndLog("\nTime in iclass checkkeys: %.0f seconds\n", (float)t1/1000.0);
-
 	DropField();
 	free(keyBlock);
 	PrintAndLog("");

client/util.c

@@ -169,23 +169,22 @@ void hex_to_buffer(const uint8_t *buf, const uint8_t *hex_data, const size_t hex
 	const size_t min_str_len, const size_t spaces_between, bool uppercase) {
 
 	char *tmp = (char *)buf;
-	size_t i;
-	memset(tmp, 0x00, hex_max_len);
 
 	int maxLen = (hex_len > hex_max_len) ? hex_max_len : hex_len;
 
-	for (i = 0; i < maxLen; ++i, tmp += 2 + spaces_between) {
+	for (int i = 0; i < maxLen; ++i, tmp += 2 + spaces_between) {
 		sprintf(tmp, (uppercase) ? "%02X" : "%02x", (unsigned int) hex_data[i]);
 
+		if (i != maxLen - 1)
 			for (int j = 0; j < spaces_between; j++)
 				sprintf(tmp + 2 + j, " ");
 	}
 
-	i *= (2 + spaces_between);
+	size_t len = strlen(tmp);
-	int minStrLen = min_str_len > i ? min_str_len : 0;
+	int minStrLen = min_str_len > len ? min_str_len : 0;
 	if (minStrLen > hex_max_len)
 		minStrLen = hex_max_len;
-	for(; i < minStrLen; i++, tmp += 1)
+	for (int i = len; i < minStrLen; i++, tmp += 1)
 		sprintf(tmp, " ");
 
 	return;