From: Oleg Moiseenko <olegmsn@gmail.com>
Date: Sun, 15 Oct 2017 19:19:34 +0000 (+0300)
Subject: Check keys in hf mf nested and hf mf chk (#414)
X-Git-Tag: v3.1.0~161
X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/commitdiff_plain/275d9e61c245e65fe09ccb5c49f09dfe505a642d

Check keys in hf mf nested and hf mf chk (#414)

Improve hf mf chk and hf mf nested
* hf mf chk. added interrupt of procedure by usb
* extract mifare default keys into separate module
* arm side multisector `hf mf chk`
* hf mf nested. change key search procedure
* hf mf nested. added key check after we have found a key.
* small fix hf list f
* hf mf chk. add timeout (arm side) and some tweaks.
---

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 842c8bef..45fe1392 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,8 @@ This project uses the changelog in accordance with [keepchangelog](http://keepac
 - Deleted wipe functionality from `hf mf csetuid` (Merlok)
 - Changed `hf mf nested` logic (Merlok)
 - Added `hf mf nested` mode: autosearch keys for attack (from well known keys) (Merlok)
+- `hf mf nested` Check keys after they have found (Merlok)
+- `hf mf chk` Move main cycle to arm (Merlok)
 
 ### Fixed
 
@@ -23,6 +25,7 @@ This project uses the changelog in accordance with [keepchangelog](http://keepac
 - Added `hf mf cwipe` command. It wipes "magic Chinese" card. For 1a generation it uses card's "wipe" command. For gen1a and gen1b it uses a write command. (Merlok)
 - Added to `hf mf nested` source key check before attack (Merlok)
 - Added to `hf mf nested` after attack it checks all found keys on non-open sectors (Merlok)
+- `hf mf chk` Added setings to set iso14443a operations timeout. default timeout set to 500us (Merlok)
 
 ## [3.0.1][2017-06-08]
 
diff --git a/armsrc/apps.h b/armsrc/apps.h
index 1ce3215f..b0070148 100644
--- a/armsrc/apps.h
+++ b/armsrc/apps.h
@@ -127,7 +127,7 @@ void MifareWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 void MifareUWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t *datain);
 void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain);
 void MifareAcquireEncryptedNonces(uint32_t arg0, uint32_t arg1, uint32_t flags, uint8_t *datain);
-void MifareChkKeys(uint16_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain);
+void MifareChkKeys(uint16_t arg0, uint16_t arg1, uint8_t arg2, uint8_t *datain);
 void Mifare1ksim(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain);
 void MifareSetDbgLvl(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain);
 void MifareEMemClr(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain);
diff --git a/armsrc/iso14443a.h b/armsrc/iso14443a.h
index 10e50e0f..9977a658 100644
--- a/armsrc/iso14443a.h
+++ b/armsrc/iso14443a.h
@@ -29,4 +29,5 @@ extern void iso14443a_setup(uint8_t fpga_minor_mode);
 extern int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data);
 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 void iso14a_set_trigger(bool enable);
+extern void iso14a_set_timeout(uint32_t timeout);
 #endif /* __ISO14443A_H */
diff --git a/armsrc/mifarecmd.c b/armsrc/mifarecmd.c
index a3f0d374..edafe0a3 100644
--- a/armsrc/mifarecmd.c
+++ b/armsrc/mifarecmd.c
@@ -20,10 +20,6 @@
 #include "parity.h"
 #include "crc.h"
 
-#define AUTHENTICATION_TIMEOUT 848			// card times out 1ms after wrong authentication (according to NXP documentation)
-#define PRE_AUTHENTICATION_LEADTIME 400		// some (non standard) cards need a pause after select before they are ready for first authentication
-
-
 // the block number for the ISO14443-4 PCB
 static uint8_t pcb_blocknum = 0;
 // Deselect card by sending a s-block. the crc is precalced for speed
@@ -961,24 +957,14 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t calibrate, uint8_t *dat
 // MIFARE check keys. key count up to 85.
 //
 //-----------------------------------------------------------------------------
-void MifareChkKeys(uint16_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
+void MifareChkKeys(uint16_t arg0, uint16_t arg1, uint8_t arg2, uint8_t *datain)
 {
 	uint8_t blockNo = arg0 & 0xff;
 	uint8_t keyType = (arg0 >> 8) & 0xff;
-	bool clearTrace = arg1;
+	bool clearTrace = arg1 & 0x01;
+	bool multisectorCheck = arg1 & 0x02;
+	uint8_t set14aTimeout = (arg1 >> 8) & 0xff;
 	uint8_t keyCount = arg2;
-	uint64_t ui64Key = 0;
-
-	bool have_uid = false;
-	uint8_t cascade_levels = 0;
-	uint32_t timeout = 0;
-	int i;
-	byte_t isOK = 0;
-	uint8_t uid[10];
-	uint32_t cuid;
-	struct Crypto1State mpcs = {0, 0};
-	struct Crypto1State *pcs;
-	pcs = &mpcs;
 
 	// clear debug level
 	int OLD_MF_DBGLEVEL = MF_DBGLEVEL;
@@ -992,53 +978,34 @@ void MifareChkKeys(uint16_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
 	if (clearTrace) clear_trace();
 	set_tracing(true);
 
-	for (i = 0; i < keyCount; i++) {
-//		if(mifare_classic_halt(pcs, cuid)) {
-//			if (MF_DBGLEVEL >= 1)	Dbprintf("ChkKeys: Halt error");
-//		}
+	if (set14aTimeout){
+		iso14a_set_timeout(set14aTimeout * 10); // timeout: ms = x/106  35-minimum, 50-OK 106-recommended 500-safe
+	}
+	
+	if (multisectorCheck) {
+		TKeyIndex keyIndex = {{0}};
+		uint8_t sectorCnt = blockNo;
+		int res = MifareMultisectorChk(datain, keyCount, sectorCnt, keyType, OLD_MF_DBGLEVEL, &keyIndex);
 
-		// Iceman: use piwi's faster nonce collecting part in hardnested.
-		if (!have_uid) { // need a full select cycle to get the uid first
-			iso14a_card_select_t card_info;
-			if(!iso14443a_select_card(uid, &card_info, &cuid, true, 0, true)) {
-				if (OLD_MF_DBGLEVEL >= 1) 	Dbprintf("ChkKeys: Can't select card");
-				--i; // try same key once again
-				continue;
-			}
-			switch (card_info.uidlen) {
-				case 4 : cascade_levels = 1; break;
-				case 7 : cascade_levels = 2; break;
-				case 10: cascade_levels = 3; break;
-				default: break;
-			}
-			have_uid = true;
-		} else { // no need for anticollision. We can directly select the card
-			if(!iso14443a_select_card(uid, NULL, NULL, false, cascade_levels, true)) {
-				if (OLD_MF_DBGLEVEL >= 1)	Dbprintf("ChkKeys: Can't select card (UID)");
-				--i; // try same key once again
-				continue;
-			}
+		LED_B_ON();
+		if (res >= 0) {
+			cmd_send(CMD_ACK, 1, 0, 0, keyIndex, 80);
+		} else {
+			cmd_send(CMD_ACK, 0, 0, 0, NULL, 0);
 		}
-
-		ui64Key = bytes_to_num(datain + i * 6, 6);
-		if(mifare_classic_auth(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) {
-			uint8_t dummy_answer = 0;
-			ReaderTransmit(&dummy_answer, 1, NULL);
-			timeout = GetCountSspClk() + AUTHENTICATION_TIMEOUT;
-
-			// wait for the card to become ready again
-			while(GetCountSspClk() < timeout);
-			continue;
+		LED_B_OFF();
+	} else {	
+		int res = MifareChkBlockKeys(datain, keyCount, blockNo, keyType, OLD_MF_DBGLEVEL);
+		
+		LED_B_ON();
+		if (res > 0) {
+			cmd_send(CMD_ACK, 1, 0, 0, datain + (res - 1) * 6, 6);
+		} else {
+			cmd_send(CMD_ACK, 0, 0, 0, NULL, 0);
 		}
-
-		isOK = 1;
-		break;
+		LED_B_OFF();
 	}
 
-	LED_B_ON();
-    cmd_send(CMD_ACK,isOK,0,0,datain + i * 6,6);
-	LED_B_OFF();
-
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	LEDsoff();
 
diff --git a/armsrc/mifareutil.c b/armsrc/mifareutil.c
index fdead5ee..97f7b3d1 100644
--- a/armsrc/mifareutil.c
+++ b/armsrc/mifareutil.c
@@ -764,3 +764,125 @@ int mifare_desfire_des_auth2(uint32_t uid, uint8_t *key, uint8_t *blockData){
 	}
 	return 1;
 }
+
+//-----------------------------------------------------------------------------
+// MIFARE check keys
+//
+//-----------------------------------------------------------------------------
+// one key check
+int MifareChkBlockKey(uint8_t *uid, uint32_t *cuid, uint8_t *cascade_levels, uint64_t ui64Key, uint8_t blockNo, uint8_t keyType, uint8_t debugLevel) {
+
+	struct Crypto1State mpcs = {0, 0};
+	struct Crypto1State *pcs;
+	pcs = &mpcs;
+
+	// Iceman: use piwi's faster nonce collecting part in hardnested.
+	if (*cascade_levels == 0) { // need a full select cycle to get the uid first
+		iso14a_card_select_t card_info;
+		if(!iso14443a_select_card(uid, &card_info, cuid, true, 0, true)) {
+			if (debugLevel >= 1) 	Dbprintf("ChkKeys: Can't select card");
+			return  1;
+		}
+		switch (card_info.uidlen) {
+			case 4 : *cascade_levels = 1; break;
+			case 7 : *cascade_levels = 2; break;
+			case 10: *cascade_levels = 3; break;
+			default: break;
+		}
+	} else { // no need for anticollision. We can directly select the card
+		if(!iso14443a_select_card(uid, NULL, NULL, false, *cascade_levels, true)) {
+			if (debugLevel >= 1)	Dbprintf("ChkKeys: Can't select card (UID) lvl=%d", *cascade_levels);
+			return  1;
+		}
+	}
+	
+	if(mifare_classic_auth(pcs, *cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) {
+//		SpinDelayUs(AUTHENTICATION_TIMEOUT); // it not needs because mifare_classic_auth have timeout from iso14a_set_timeout()
+		return 2;
+	} else {
+/*		// let it be here. it like halt command, but maybe it will work in some strange cases
+		uint8_t dummy_answer = 0;
+		ReaderTransmit(&dummy_answer, 1, NULL);
+		int timeout = GetCountSspClk() + AUTHENTICATION_TIMEOUT;			
+		// wait for the card to become ready again
+		while(GetCountSspClk() < timeout) {};
+*/
+		// it needs after success authentication
+		mifare_classic_halt(pcs, *cuid);
+	}
+	
+	return 0;
+}
+
+// multi key check
+int MifareChkBlockKeys(uint8_t *keys, uint8_t keyCount, uint8_t blockNo, uint8_t keyType, uint8_t debugLevel) {
+	uint8_t uid[10];
+	uint32_t cuid = 0;
+	uint8_t cascade_levels = 0;
+	uint64_t ui64Key = 0;
+
+	int retryCount = 0;
+	for (uint8_t i = 0; i < keyCount; i++) {
+
+		// Allow button press / usb cmd to interrupt device
+		if (BUTTON_PRESS() && !usb_poll_validate_length()) { 
+			Dbprintf("ChkKeys: Cancel operation. Exit...");
+			return -2;
+		}
+
+		ui64Key = bytes_to_num(keys + i * 6, 6);
+		int res = MifareChkBlockKey(uid, &cuid, &cascade_levels, ui64Key, blockNo, keyType, debugLevel);
+		
+		// can't select
+		if (res == 1) {
+			retryCount++;
+			if (retryCount >= 5) {
+				Dbprintf("ChkKeys: block=%d key=%d. Can't select. Exit...", blockNo, keyType);
+				return -1;
+			}
+			--i; // try the same key once again
+
+			SpinDelay(20);
+//			Dbprintf("ChkKeys: block=%d key=%d. Try the same key once again...", blockNo, keyType);
+			continue;
+		}
+		
+		// can't authenticate
+		if (res == 2) {
+			retryCount = 0;
+			continue; // can't auth. wrong key.
+		}
+
+		return i + 1;
+	}
+	
+	return 0;
+}
+
+// multisector multikey check
+int MifareMultisectorChk(uint8_t *keys, uint8_t keyCount, uint8_t SectorCount, uint8_t keyType, uint8_t debugLevel, TKeyIndex *keyIndex) {
+	int res = 0;
+	
+//	int clk = GetCountSspClk();
+
+	for(int sc = 0; sc < SectorCount; sc++){
+		WDT_HIT();
+
+		int keyAB = keyType;
+		do {
+			res = MifareChkBlockKeys(keys, keyCount, FirstBlockOfSector(sc), keyAB & 0x01, debugLevel);
+			if (res < 0){
+				return res;
+			}
+			if (res > 0){
+				(*keyIndex)[keyAB & 0x01][sc] = res;
+			}
+		} while(--keyAB > 0);
+	}
+	
+//	Dbprintf("%d %d", GetCountSspClk() - clk, (GetCountSspClk() - clk)/(SectorCount*keyCount*(keyType==2?2:1)));
+	
+	return 0;
+}
+
+
diff --git a/armsrc/mifareutil.h b/armsrc/mifareutil.h
index 468c5cce..8ffd5e89 100644
--- a/armsrc/mifareutil.h
+++ b/armsrc/mifareutil.h
@@ -13,6 +13,7 @@
 #define __MIFAREUTIL_H
 
 #include "crapto1/crapto1.h"
+#include "usb_cdc.h"
 
 // mifare authentication
 #define CRYPT_NONE    0
@@ -20,6 +21,8 @@
 #define CRYPT_REQUEST 2
 #define AUTH_FIRST    0	
 #define AUTH_NESTED   2
+#define AUTHENTICATION_TIMEOUT 848			// card times out 1ms after wrong authentication (according to NXP documentation)
+#define PRE_AUTHENTICATION_LEADTIME 400		// some (non standard) cards need a pause after select before they are ready for first authentication
 
 // mifare 4bit card answers
 #define CARD_ACK      0x0A  // 1010 - ACK
@@ -99,4 +102,10 @@ int emlGetValBl(uint32_t *blReg, uint8_t *blBlock, int blockNum);
 int emlSetValBl(uint32_t blReg, uint8_t blBlock, int blockNum);
 int emlCheckValBl(int blockNum);
 
+// mifare check keys
+typedef uint8_t TKeyIndex[2][40];
+int MifareChkBlockKey(uint8_t *uid, uint32_t *cuid, uint8_t *cascade_levels, uint64_t ui64Key, uint8_t blockNo, uint8_t keyType, uint8_t debugLevel);
+int MifareChkBlockKeys(uint8_t *keys, uint8_t keyCount, uint8_t blockNo, uint8_t keyType, uint8_t debugLevel);
+int MifareMultisectorChk(uint8_t *keys, uint8_t keyCount, uint8_t SectorCount, uint8_t keyType, uint8_t debugLevel, TKeyIndex *keyIndex);
+
 #endif
diff --git a/client/cmdhf.c b/client/cmdhf.c
index eb2ba9b2..6aa5ae4e 100644
--- a/client/cmdhf.c
+++ b/client/cmdhf.c
@@ -546,7 +546,7 @@ uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, ui
 	
 	if (showWaitCycles && !isResponse && next_record_is_response(tracepos, trace)) {
 		uint32_t next_timestamp = *((uint32_t *)(trace + tracepos));
-		PrintAndLog(" %9d | %9d | %s | fdt (Frame Delay Time): %d",
+		PrintAndLog(" %10d | %10d | %s | fdt (Frame Delay Time): %d",
 			(EndOfTransmissionTimestamp - first_timestamp),
 			(next_timestamp - first_timestamp),
 			"   ",
diff --git a/client/cmdhfmf.c b/client/cmdhfmf.c
index 295f22b7..12fb0b78 100644
--- a/client/cmdhfmf.c
+++ b/client/cmdhfmf.c
@@ -524,13 +524,6 @@ int CmdHF14AMfRestore(const char *Cmd)
 	return 0;
 }
 
-
-typedef struct {
-	uint64_t Key[2];
-	int foundKey[2];
-} sector_t;
-
-
 # define NESTED_KEY_COUNT 15
 int CmdHF14AMfNested(const char *Cmd)
 {
@@ -686,35 +679,12 @@ int CmdHF14AMfNested(const char *Cmd)
 		if (e_sector == NULL) return 1;
 
 		//test current key and additional standard keys first
-		memcpy(keyBlock, key, 6);
-		num_to_bytes(0xffffffffffff, 6, (uint8_t*)(keyBlock + 1 * 6));
-		num_to_bytes(0x000000000000, 6, (uint8_t*)(keyBlock + 2 * 6));
-		num_to_bytes(0xa0a1a2a3a4a5, 6, (uint8_t*)(keyBlock + 3 * 6));
-		num_to_bytes(0xb0b1b2b3b4b5, 6, (uint8_t*)(keyBlock + 4 * 6));
-		num_to_bytes(0xaabbccddeeff, 6, (uint8_t*)(keyBlock + 5 * 6));
-		num_to_bytes(0x4d3a99c351dd, 6, (uint8_t*)(keyBlock + 6 * 6));
-		num_to_bytes(0x1a982c7e459a, 6, (uint8_t*)(keyBlock + 7 * 6));
-		num_to_bytes(0xd3f7d3f7d3f7, 6, (uint8_t*)(keyBlock + 8 * 6));
-		num_to_bytes(0x714c5c886e97, 6, (uint8_t*)(keyBlock + 9 * 6));
-		num_to_bytes(0x587ee5f9350f, 6, (uint8_t*)(keyBlock + 10 * 6));
-		num_to_bytes(0xa0478cc39091, 6, (uint8_t*)(keyBlock + 11 * 6));
-		num_to_bytes(0x533cb6c723f6, 6, (uint8_t*)(keyBlock + 12 * 6));
-		num_to_bytes(0x8fd0a4f256e9, 6, (uint8_t*)(keyBlock + 13 * 6));
-		num_to_bytes(0x1a2b3c4d5e6f, 6, (uint8_t*)(keyBlock + 14 * 6));
+		for (int defaultKeyCounter = 0; defaultKeyCounter < MifareDefaultKeysSize; defaultKeyCounter++){
+			num_to_bytes(MifareDefaultKeys[defaultKeyCounter], 6, (uint8_t*)(keyBlock + defaultKeyCounter * 6));
+		}
 
 		PrintAndLog("Testing known keys. Sector count=%d", SectorsCnt);
-		for (i = 0; i < SectorsCnt; i++) {
-			for (j = 0; j < 2; j++) {
-				if (e_sector[i].foundKey[j]) continue;
-
-				res = mfCheckKeys(FirstBlockOfSector(i), j, true, NESTED_KEY_COUNT, keyBlock, &key64); 
-
-				if (!res) {
-					e_sector[i].Key[j] = key64;
-					e_sector[i].foundKey[j] = 1;
-				}
-			}
-		}
+		mfCheckKeysSec(SectorsCnt, 2, MF_CHKKEYS_DEFTIMEOUT, true, NESTED_KEY_COUNT, keyBlock, e_sector);
 		
 		// get known key from array
 		bool keyFound = false;
@@ -772,6 +742,9 @@ int CmdHF14AMfNested(const char *Cmd)
 						PrintAndLog("Found valid key:%012" PRIx64, key64);
 						e_sector[sectorNo].foundKey[trgKeyType] = 1;
 						e_sector[sectorNo].Key[trgKeyType] = key64;
+						
+						// try to check this key as a key to the other sectors
+						mfCheckKeysSec(SectorsCnt, 2, MF_CHKKEYS_DEFTIMEOUT, true, 1, keyBlock, e_sector);
 					}
 				}
 			}
@@ -781,66 +754,6 @@ int CmdHF14AMfNested(const char *Cmd)
 		PrintAndLog("\n\n-----------------------------------------------\nNested statistic:\nIterations count: %d", iterations);
 		PrintAndLog("Time in nested: %1.3f (%1.3f sec per key)", ((float)(msclock() - msclock1))/1000.0, ((float)(msclock() - msclock1))/iterations/1000.0);
 		
-		// check if we have unrecognized keys
-		bool notFoundKeys = false;
-		for (i = 0; i < SectorsCnt; i++) {
-			for (j = 0; j < 2; j++) {
-				if (!e_sector[i].foundKey[j]) {
-					notFoundKeys = true;
-					break;
-				}
-			}
-			if (notFoundKeys) break;
-		}		
-		
-		if (notFoundKeys) {
-			PrintAndLog("-----------------------------------------------\n");
-			PrintAndLog("We have unrecognized keys. Trying to check if we have this keys on key buffer...");
-
-			// fill keyBlock with known keys
-			int cnt = 0;
-			for (i = 0; i < SectorsCnt; i++) {
-				for (j = 0; j < 2; j++) {
-					if (e_sector[i].foundKey[j]) {
-						// try to insert key to keyBlock						
-						if (cnt < NESTED_KEY_COUNT) {
-
-							// search for dublicates
-							bool dubl = false;
-							for (int v = 0; v < NESTED_KEY_COUNT; v++) {
-								if (e_sector[i].Key[j] == bytes_to_num((uint8_t*)(keyBlock + v * 6), 6)) {
-									dubl = true;
-									break;
-								}
-							}
-							
-							// insert
-							if (!dubl) {
-								num_to_bytes(e_sector[i].Key[j], 6, (uint8_t*)(keyBlock + cnt * 6));
-								cnt++;
-							}
-						}
-					}
-				}
-			}
-
-			// try to auth with known keys to not recognized sectors keys
-			PrintAndLog("Testing keys. Sector count=%d known keys count:%d", SectorsCnt, cnt);
-			for (i = 0; i < SectorsCnt; i++) {
-				for (j = 0; j < 2; j++) {
-					if (e_sector[i].foundKey[j]) continue;
-
-					res = mfCheckKeys(FirstBlockOfSector(i), j, true, cnt, keyBlock, &key64); 
-
-					if (!res) {
-						e_sector[i].Key[j] = key64;
-						e_sector[i].foundKey[j] = 1;
-					}
-				}
-			}			
-			
-		} // if (notFoundKeys)
-		
 		// print result
 		PrintAndLog("|---|----------------|---|----------------|---|");
 		PrintAndLog("|sec|key A           |res|key B           |res|");
@@ -1022,14 +935,18 @@ int CmdHF14AMfNestedHard(const char *Cmd)
 int CmdHF14AMfChk(const char *Cmd)
 {
 	if (strlen(Cmd)<3) {
-		PrintAndLog("Usage:  hf mf chk <block number>|<*card memory> <key type (A/B/?)> [t|d] [<key (12 hex symbols)>] [<dic (*.dic)>]");
+		PrintAndLog("Usage:  hf mf chk <block number>|<*card memory> <key type (A/B/?)> [t|d|s|ss] [<key (12 hex symbols)>] [<dic (*.dic)>]");
 		PrintAndLog("          * - all sectors");
 		PrintAndLog("card memory - 0 - MINI(320 bytes), 1 - 1K, 2 - 2K, 4 - 4K, <other> - 1K");
 		PrintAndLog("d - write keys to binary file\n");
 		PrintAndLog("t - write keys to emulator memory");
+		PrintAndLog("s - slow execute. timeout 1ms");
+		PrintAndLog("ss- very slow execute. timeout 5ms");
 		PrintAndLog("      sample: hf mf chk 0 A 1234567890ab keys.dic");
 		PrintAndLog("              hf mf chk *1 ? t");
 		PrintAndLog("              hf mf chk *1 ? d");
+		PrintAndLog("              hf mf chk *1 ? s");
+		PrintAndLog("              hf mf chk *1 ? dss");
 		return 0;
 	}
 
@@ -1042,42 +959,28 @@ int CmdHF14AMfChk(const char *Cmd)
 	int i, res;
 	int	keycnt = 0;
 	char ctmp	= 0x00;
+	char ctmp3[3]	= {0x00};
 	uint8_t blockNo = 0;
-	uint8_t SectorsCnt = 1;
+	uint8_t SectorsCnt = 0;
 	uint8_t keyType = 0;
 	uint64_t key64 = 0;
+	uint32_t timeout14a = 0; // timeout in us
+	bool param3InUse = false;
 
 	int transferToEml = 0;
 	int createDumpFile = 0;
+	
+	sector_t *e_sector = NULL;
 
 	keyBlock = calloc(stKeyBlock, 6);
 	if (keyBlock == NULL) return 1;
 
-	uint64_t defaultKeys[] =
-	{
-		0xffffffffffff, // Default key (first key used by program if no user defined key)
-		0x000000000000, // Blank key
-		0xa0a1a2a3a4a5, // NFCForum MAD key
-		0xb0b1b2b3b4b5,
-		0xaabbccddeeff,
-		0x4d3a99c351dd,
-		0x1a982c7e459a,
-		0xd3f7d3f7d3f7,
-		0x714c5c886e97,
-		0x587ee5f9350f,
-		0xa0478cc39091,
-		0x533cb6c723f6,
-		0x8fd0a4f256e9
-	};
-	int defaultKeysSize = sizeof(defaultKeys) / sizeof(uint64_t);
-
-	for (int defaultKeyCounter = 0; defaultKeyCounter < defaultKeysSize; defaultKeyCounter++)
-	{
-		num_to_bytes(defaultKeys[defaultKeyCounter], 6, (uint8_t*)(keyBlock + defaultKeyCounter * 6));
+	int defaultKeysSize = MifareDefaultKeysSize;
+	for (int defaultKeyCounter = 0; defaultKeyCounter < defaultKeysSize; defaultKeyCounter++){
+		num_to_bytes(MifareDefaultKeys[defaultKeyCounter], 6, (uint8_t*)(keyBlock + defaultKeyCounter * 6));
 	}
 
 	if (param_getchar(Cmd, 0)=='*') {
-		blockNo = 3;
 		SectorsCnt = ParamCardSizeSectors(param_getchar(Cmd + 1, 0));
 	}
 	else
@@ -1086,10 +989,10 @@ int CmdHF14AMfChk(const char *Cmd)
 	ctmp = param_getchar(Cmd, 1);
 	switch (ctmp) {
 	case 'a': case 'A':
-		keyType = !0;
+		keyType = 0;
 		break;
 	case 'b': case 'B':
-		keyType = !1;
+		keyType = 1;
 		break;
 	case '?':
 		keyType = 2;
@@ -1100,11 +1003,33 @@ int CmdHF14AMfChk(const char *Cmd)
 		return 1;
 	};
 
+	// transfer to emulator & create dump file
 	ctmp = param_getchar(Cmd, 2);
-	if		(ctmp == 't' || ctmp == 'T') transferToEml = 1;
-	else if (ctmp == 'd' || ctmp == 'D') createDumpFile = 1;
+	if (ctmp == 't' || ctmp == 'T') transferToEml = 1;
+	if (ctmp == 'd' || ctmp == 'D') createDumpFile = 1;
+	
+	param3InUse = transferToEml | createDumpFile;
+	
+	timeout14a = 500; // fast by default
+	// double parameters - ts, ds
+	int clen = param_getlength(Cmd, 2);
+	if (clen == 2 || clen == 3){
+		param_getstr(Cmd, 2, ctmp3);
+		ctmp = ctmp3[1];
+	}
+	//parse
+	if (ctmp == 's' || ctmp == 'S') {
+		timeout14a = 1000; // slow
+		if (!param3InUse && clen == 2 && (ctmp3[1] == 's' || ctmp3[1] == 'S')) {
+			timeout14a = 5000; // very slow
+		}
+		if (param3InUse && clen == 3 && (ctmp3[2] == 's' || ctmp3[2] == 'S')) {
+			timeout14a = 5000; // very slow
+		}
+		param3InUse = true;
+	}
 
-	for (i = transferToEml || createDumpFile; param_getchar(Cmd, 2 + i); i++) {
+	for (i = param3InUse; param_getchar(Cmd, 2 + i); i++) {
 		if (!param_gethex(Cmd, 2 + i, keyBlock + 6 * keycnt, 12)) {
 			if ( stKeyBlock - keycnt < 2) {
 				p = realloc(keyBlock, 6*(stKeyBlock+=10));
@@ -1169,6 +1094,7 @@ int CmdHF14AMfChk(const char *Cmd)
 		}
 	}
 
+	// fill with default keys
 	if (keycnt == 0) {
 		PrintAndLog("No key specified, trying default keys");
 		for (;keycnt < defaultKeysSize; keycnt++)
@@ -1178,47 +1104,84 @@ int CmdHF14AMfChk(const char *Cmd)
 	}
 
 	// initialize storage for found keys
-	bool validKey[2][40];
-	uint8_t foundKey[2][40][6];
-	for (uint16_t t = 0; t < 2; t++) {
+	e_sector = calloc(SectorsCnt, sizeof(sector_t));
+	if (e_sector == NULL) return 1;
+	for (uint8_t keyAB = 0; keyAB < 2; keyAB++) {
 		for (uint16_t sectorNo = 0; sectorNo < SectorsCnt; sectorNo++) {
-			validKey[t][sectorNo] = false;
-			for (uint16_t i = 0; i < 6; i++) {
-				foundKey[t][sectorNo][i] = 0xff;
-			}
+			e_sector[sectorNo].Key[keyAB] = 0xffffffffffff;
+			e_sector[sectorNo].foundKey[keyAB] = 0;
 		}
 	}
+	printf("\n");
+
+	bool foundAKey = false;
+	uint32_t max_keys = keycnt > USB_CMD_DATA_SIZE / 6 ? USB_CMD_DATA_SIZE / 6 : keycnt;
+	if (SectorsCnt) {
+		PrintAndLog("To cancel this operation press the button on the proxmark...");
+		printf("--");
+		for (uint32_t c = 0; c < keycnt; c += max_keys) {
 
-	for ( int t = !keyType; t < 2; keyType==2?(t++):(t=2) ) {
-		int b=blockNo;
-		for (int i = 0; i < SectorsCnt; ++i) {
-			PrintAndLog("--sector:%2d, block:%3d, key type:%C, key count:%2d ", i, b, t?'B':'A', keycnt);
-			uint32_t max_keys = keycnt>USB_CMD_DATA_SIZE/6?USB_CMD_DATA_SIZE/6:keycnt;
+			uint32_t size = keycnt-c > max_keys ? max_keys : keycnt-c;
+			res = mfCheckKeysSec(SectorsCnt, keyType, timeout14a * 1.06 / 100, true, size, &keyBlock[6 * c], e_sector); // timeout is (ms * 106)/10 or us*0.0106
+
+			if (res != 1) {
+				if (!res) {
+					printf("o");
+					foundAKey = true;
+				} else {
+					printf(".");
+				}
+			} else {
+				printf("\n");
+				PrintAndLog("Command execute timeout");
+			}
+		}
+	} else {
+		int keyAB = keyType;
+		do {
 			for (uint32_t c = 0; c < keycnt; c+=max_keys) {
-				uint32_t size = keycnt-c>max_keys?max_keys:keycnt-c;
-				res = mfCheckKeys(b, t, true, size, &keyBlock[6*c], &key64);
+
+				uint32_t size = keycnt-c > max_keys ? max_keys : keycnt-c;
+				res = mfCheckKeys(blockNo, keyAB & 0x01, true, size, &keyBlock[6 * c], &key64); 
+
 				if (res != 1) {
 					if (!res) {
-						PrintAndLog("Found valid key:[%012" PRIx64 "]",key64);
-						num_to_bytes(key64, 6, foundKey[t][i]);
-						validKey[t][i] = true;
+						PrintAndLog("Found valid key:[%d:%c]%012" PRIx64, blockNo, (keyAB & 0x01)?'B':'A', key64);
+						foundAKey = true;
 					}
 				} else {
 					PrintAndLog("Command execute timeout");
 				}
 			}
-			b<127?(b+=4):(b+=16);
-		}
+		} while(--keyAB > 0);
 	}
-
+	
+	// print result
+	if (foundAKey) {
+		if (SectorsCnt) {
+			PrintAndLog("");
+			PrintAndLog("|---|----------------|---|----------------|---|");
+			PrintAndLog("|sec|key A           |res|key B           |res|");
+			PrintAndLog("|---|----------------|---|----------------|---|");
+			for (i = 0; i < SectorsCnt; i++) {
+				PrintAndLog("|%03d|  %012" PRIx64 "  | %d |  %012" PRIx64 "  | %d |", i,
+					e_sector[i].Key[0], e_sector[i].foundKey[0], e_sector[i].Key[1], e_sector[i].foundKey[1]);
+			}
+			PrintAndLog("|---|----------------|---|----------------|---|");
+		}
+	} else {
+		PrintAndLog("");
+		PrintAndLog("No valid keys found.");
+	}	
+	
 	if (transferToEml) {
 		uint8_t block[16];
 		for (uint16_t sectorNo = 0; sectorNo < SectorsCnt; sectorNo++) {
-			if (validKey[0][sectorNo] || validKey[1][sectorNo]) {
+			if (e_sector[sectorNo].foundKey[0] || e_sector[sectorNo].foundKey[1]) {
 				mfEmlGetMem(block, FirstBlockOfSector(sectorNo) + NumBlocksPerSector(sectorNo) - 1, 1);
 				for (uint16_t t = 0; t < 2; t++) {
-					if (validKey[t][sectorNo]) {
-						memcpy(block + t*10, foundKey[t][sectorNo], 6);
+					if (e_sector[sectorNo].foundKey[t]) {
+						num_to_bytes(e_sector[sectorNo].Key[t], 6, block + t * 10);
 					}
 				}
 				mfEmlSetMem(block, FirstBlockOfSector(sectorNo) + NumBlocksPerSector(sectorNo) - 1, 1);
@@ -1231,16 +1194,22 @@ int CmdHF14AMfChk(const char *Cmd)
 		FILE *fkeys = fopen("dumpkeys.bin","wb");
 		if (fkeys == NULL) {
 			PrintAndLog("Could not create file dumpkeys.bin");
+			free(e_sector);
 			free(keyBlock);
 			return 1;
 		}
-		for (uint16_t t = 0; t < 2; t++) {
-			fwrite(foundKey[t], 1, 6*SectorsCnt, fkeys);
+		uint8_t mkey[6];
+		for (uint8_t t = 0; t < 2; t++) {
+			for (uint8_t sectorNo = 0; sectorNo < SectorsCnt; sectorNo++) {
+				num_to_bytes(e_sector[sectorNo].Key[t], 6, mkey);
+				fwrite(mkey, 1, 6, fkeys);
+			}
 		}
 		fclose(fkeys);
 		PrintAndLog("Found keys have been dumped to file dumpkeys.bin. 0xffffffffffff has been inserted for unknown keys.");
 	}
 
+	free(e_sector);
 	free(keyBlock);
 	PrintAndLog("");
 	return 0;
diff --git a/client/cmdhfmf.h b/client/cmdhfmf.h
index 235fd86d..3bd3e95a 100644
--- a/client/cmdhfmf.h
+++ b/client/cmdhfmf.h
@@ -11,6 +11,8 @@
 #ifndef CMDHFMF_H__
 #define CMDHFMF_H__
 
+#include "mifaredefault.h"
+
 extern int CmdHFMF(const char *Cmd);
 
 extern int CmdHF14AMfDbg(const char* cmd);
diff --git a/client/cmdmain.c b/client/cmdmain.c
index f407cee4..db88b3ac 100644
--- a/client/cmdmain.c
+++ b/client/cmdmain.c
@@ -139,7 +139,7 @@ int getCommand(UsbCommand* response)
  * @param ms_timeout
  * @return true if command was returned, otherwise false
  */
-bool WaitForResponseTimeout(uint32_t cmd, UsbCommand* response, size_t ms_timeout) {
+bool WaitForResponseTimeoutW(uint32_t cmd, UsbCommand* response, size_t ms_timeout, bool show_warning) {
   
 	UsbCommand resp;
 	
@@ -155,7 +155,7 @@ bool WaitForResponseTimeout(uint32_t cmd, UsbCommand* response, size_t ms_timeou
 			}
 		}
 		msleep(10); // XXX ugh
-		if (dm_seconds == 200) { // Two seconds elapsed
+		if (dm_seconds == 200 && show_warning) { // Two seconds elapsed
 			PrintAndLog("Waiting for a response from the proxmark...");
 			PrintAndLog("Don't forget to cancel its operation first by pressing on the button");
 		}
@@ -163,9 +163,12 @@ bool WaitForResponseTimeout(uint32_t cmd, UsbCommand* response, size_t ms_timeou
 	return false;
 }
 
+bool WaitForResponseTimeout(uint32_t cmd, UsbCommand* response, size_t ms_timeout) {
+	return WaitForResponseTimeoutW(cmd, response, ms_timeout, true);
+}
 
 bool WaitForResponse(uint32_t cmd, UsbCommand* response) {
-	return WaitForResponseTimeout(cmd,response,-1);
+	return WaitForResponseTimeoutW(cmd, response, -1, true);
 }
 
 
diff --git a/client/cmdmain.h b/client/cmdmain.h
index 0de3f392..d39bc114 100644
--- a/client/cmdmain.h
+++ b/client/cmdmain.h
@@ -18,6 +18,7 @@
 
 extern void UsbCommandReceived(UsbCommand *UC);
 extern int CommandReceived(char *Cmd);
+extern bool WaitForResponseTimeoutW(uint32_t cmd, UsbCommand* response, size_t ms_timeout, bool show_warning);
 extern bool WaitForResponseTimeout(uint32_t cmd, UsbCommand* response, size_t ms_timeout);
 extern bool WaitForResponse(uint32_t cmd, UsbCommand* response);
 extern void clearCommandBuffer();
diff --git a/client/mifaredefault.h b/client/mifaredefault.h
new file mode 100644
index 00000000..78231c86
--- /dev/null
+++ b/client/mifaredefault.h
@@ -0,0 +1,40 @@
+//-----------------------------------------------------------------------------
+// Copyright (C) 2017 Merlok
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// Mifare default constants
+//-----------------------------------------------------------------------------
+
+#ifndef MIFAREDEFAULT_H__
+#define MIFAREDEFAULT_H__
+
+#include <inttypes.h>
+
+#define MifareDefaultKeysSize sizeof(MifareDefaultKeys) / sizeof(uint64_t)
+
+static const uint64_t MifareDefaultKeys[] =
+{
+	0xffffffffffff, // Default key (first key used by program if no user defined key)
+	0x000000000000, // Blank key
+	0xa0a1a2a3a4a5, // NFCForum MAD key
+	0xb0b1b2b3b4b5,
+	0xaabbccddeeff,
+	0x1a2b3c4d5e6f,
+	0x123456789abc,
+	0x010203040506,
+	0x123456abcdef,
+	0xabcdef123456,
+	0x4d3a99c351dd,
+	0x1a982c7e459a,
+	0xd3f7d3f7d3f7,
+	0x714c5c886e97,
+	0x587ee5f9350f,
+	0xa0478cc39091,
+	0x533cb6c723f6,
+	0x8fd0a4f256e9
+};
+
+#endif
diff --git a/client/mifarehost.c b/client/mifarehost.c
index 629c8feb..a02019a3 100644
--- a/client/mifarehost.c
+++ b/client/mifarehost.c
@@ -228,17 +228,46 @@ int mfCheckKeys (uint8_t blockNo, uint8_t keyType, bool clear_trace, uint8_t key
 
 	*key = -1;
 
-	UsbCommand c = {CMD_MIFARE_CHKKEYS, {((blockNo & 0xff) | ((keyType&0xff)<<8)), clear_trace, keycnt}};
+	UsbCommand c = {CMD_MIFARE_CHKKEYS, {((blockNo & 0xff) | ((keyType & 0xff) << 8)), clear_trace, keycnt}}; 
 	memcpy(c.d.asBytes, keyBlock, 6 * keycnt);
 	SendCommand(&c);
 
 	UsbCommand resp;
-	if (!WaitForResponseTimeout(CMD_ACK,&resp,3000)) return 1;
+	if (!WaitForResponseTimeout(CMD_ACK,&resp,3000)) return 1; 
 	if ((resp.arg[0] & 0xff) != 0x01) return 2;
 	*key = bytes_to_num(resp.d.asBytes, 6);
 	return 0;
 }
 
+int mfCheckKeysSec(uint8_t sectorCnt, uint8_t keyType, uint8_t timeout14a, bool clear_trace, uint8_t keycnt, uint8_t * keyBlock, sector_t * e_sector){
+
+	uint8_t keyPtr = 0;
+
+	if (e_sector == NULL)
+		return -1;
+
+	UsbCommand c = {CMD_MIFARE_CHKKEYS, {((sectorCnt & 0xff) | ((keyType & 0xff) << 8)), (clear_trace | 0x02)|((timeout14a & 0xff) << 8), keycnt}}; 
+	memcpy(c.d.asBytes, keyBlock, 6 * keycnt);
+	SendCommand(&c);
+
+	UsbCommand resp;
+	if (!WaitForResponseTimeoutW(CMD_ACK, &resp, MAX(3000, 1000 + 13 * sectorCnt * keycnt * (keyType == 2 ? 2 : 1)), false)) return 1; // timeout: 13 ms / fail auth
+	if ((resp.arg[0] & 0xff) != 0x01) return 2;
+	
+	bool foundAKey = false;
+	for(int sec = 0; sec < sectorCnt; sec++){
+		for(int keyAB = 0; keyAB < 2; keyAB++){
+			keyPtr = *(resp.d.asBytes + keyAB * 40 + sec);
+			if (keyPtr){
+				e_sector[sec].foundKey[keyAB] = true;
+				e_sector[sec].Key[keyAB] = bytes_to_num(keyBlock + (keyPtr - 1) * 6, 6);
+				foundAKey = true;
+			}
+		}
+	}
+	return foundAKey ? 0 : 3;
+}
+
 // Compare 16 Bits out of cryptostate
 int Compare16Bits(const void * a, const void * b) {
 	if ((*(uint64_t*)b & 0x00ff000000ff0000) == (*(uint64_t*)a & 0x00ff000000ff0000)) return 0;
diff --git a/client/mifarehost.h b/client/mifarehost.h
index 34793a29..118d55cc 100644
--- a/client/mifarehost.h
+++ b/client/mifarehost.h
@@ -1,4 +1,4 @@
-// Merlok, 2011
+// Merlok, 2011, 2017
 // people from mifare@nethemba.com, 2010
 //
 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
@@ -15,6 +15,11 @@
 #include <stdbool.h>
 #include "data.h"
 
+// defaults
+// timeout in units. (ms * 106)/10 or us*0.0106
+// 5 == 500us
+#define MF_CHKKEYS_DEFTIMEOUT		5
+
 // mfCSetBlock work flags
 #define CSETBLOCK_UID 				0x01
 #define CSETBLOCK_WUPC				0x02
@@ -24,11 +29,17 @@
 #define CSETBLOCK_SINGLE_OPER			0x1F
 #define CSETBLOCK_MAGIC_1B 			0x40
 
+typedef struct {
+	uint64_t Key[2];
+	int foundKey[2];
+} sector_t;
+
 extern char logHexFileName[FILE_PATH_SIZE];
 
 extern int mfDarkside(uint64_t *key);
 extern int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint8_t trgBlockNo, uint8_t trgKeyType, uint8_t *ResultKeys, bool calibrate);
 extern int mfCheckKeys (uint8_t blockNo, uint8_t keyType, bool clear_trace, uint8_t keycnt, uint8_t *keyBlock, uint64_t *key);
+extern int mfCheckKeysSec(uint8_t sectorCnt, uint8_t keyType, uint8_t timeout14a, bool clear_trace, uint8_t keycnt, uint8_t * keyBlock, sector_t * e_sector);
 
 extern int mfEmlGetMem(uint8_t *data, int blockNum, int blocksCount);
 extern int mfEmlSetMem(uint8_t *data, int blockNum, int blocksCount);