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Update lfops.c
[proxmark3-svn] / armsrc / mifaresim.c
diff --git a/armsrc/mifaresim.c b/armsrc/mifaresim.c
index 91f45efd63461c7a294e583478038243407b040f..137a586d28853a9c1d82e549859a2d926c2629b2 100644 (file)
--- a/armsrc/mifaresim.c
+++ b/armsrc/mifaresim.c
@@ -25,36 +25,179 @@
 #include "apps.h"
 
 //mifare emulator states
 #include "apps.h"
 
 //mifare emulator states
-#define MFEMUL_NOFIELD      0
-#define MFEMUL_IDLE         1
-#define MFEMUL_SELECT1      2
-#define MFEMUL_SELECT2      3
-#define MFEMUL_SELECT3      4
-#define MFEMUL_AUTH1        5
-#define MFEMUL_AUTH2        6
-#define MFEMUL_WORK            7
-#define MFEMUL_WRITEBL2     8
-#define MFEMUL_INTREG_INC   9
-#define MFEMUL_INTREG_DEC  10
-#define MFEMUL_INTREG_REST 11
-#define MFEMUL_HALTED      12
+#define MFEMUL_NOFIELD           0
+#define MFEMUL_IDLE              1
+#define MFEMUL_SELECT1           2
+#define MFEMUL_SELECT2           3
+#define MFEMUL_SELECT3           4
+#define MFEMUL_AUTH1             5
+#define MFEMUL_AUTH2             6
+#define MFEMUL_WORK              7
+#define MFEMUL_WRITEBL2          8
+#define MFEMUL_INTREG_INC        9
+#define MFEMUL_INTREG_DEC       10
+#define MFEMUL_INTREG_REST      11
+#define MFEMUL_HALTED           12
+
+#define AC_DATA_READ             0
+#define AC_DATA_WRITE            1
+#define AC_DATA_INC              2
+#define AC_DATA_DEC_TRANS_REST   3
+#define AC_KEYA_READ             0
+#define AC_KEYA_WRITE            1
+#define AC_KEYB_READ             2
+#define AC_KEYB_WRITE            3
+#define AC_AC_READ               4
+#define AC_AC_WRITE              5
+
+#define AUTHKEYA                 0
+#define AUTHKEYB                 1
+#define AUTHKEYNONE              0xff
+
+
+static int ParamCardSizeBlocks(const char c) {
+       int numBlocks = 16 * 4;
+       switch (c) {
+               case '0' : numBlocks = 5 * 4; break;
+               case '2' : numBlocks = 32 * 4; break;
+               case '4' : numBlocks = 32 * 4 + 8 * 16; break;
+               default:   numBlocks = 16 * 4;
+       }
+       return numBlocks;
+}
+
+static uint8_t BlockToSector(int block_num) {
+       if (block_num < 32 * 4) {    // 4 blocks per sector
+               return (block_num / 4);
+       } else {                     // 16 blocks per sector
+               return 32 + (block_num - 32 * 4) / 16;
+       }
+}
+
+static bool IsTrailerAccessAllowed(uint8_t blockNo, uint8_t keytype, uint8_t action) {
+       uint8_t sector_trailer[16];
+       emlGetMem(sector_trailer, blockNo, 1);
+       uint8_t AC = ((sector_trailer[7] >> 5) & 0x04)
+                          | ((sector_trailer[8] >> 2) & 0x02)
+                          | ((sector_trailer[8] >> 7) & 0x01);
+       switch (action) {
+               case AC_KEYA_READ: {
+                       return false;
+                       break;
+               }
+               case AC_KEYA_WRITE: {
+                       return ((keytype == AUTHKEYA && (AC == 0x00 || AC == 0x01))
+                                || (keytype == AUTHKEYB && (AC == 0x04 || AC == 0x03)));
+                       break;
+               }
+               case AC_KEYB_READ: {
+                       return (keytype == AUTHKEYA && (AC == 0x00 || AC == 0x02 || AC == 0x01));
+                       break;
+               }
+               case AC_KEYB_WRITE: {
+                       return ((keytype == AUTHKEYA && (AC == 0x00 || AC == 0x04))
+                                || (keytype == AUTHKEYB && (AC == 0x04 || AC == 0x03)));
+                       break;
+               }
+               case AC_AC_READ: {
+                       return ((keytype == AUTHKEYA)
+                                || (keytype == AUTHKEYB && !(AC == 0x00 || AC == 0x02 || AC == 0x01)));
+                       break;
+               }
+               case AC_AC_WRITE: {
+                       return ((keytype == AUTHKEYA && (AC == 0x01))
+                                || (keytype == AUTHKEYB && (AC == 0x03 || AC == 0x05)));
+                       break;
+               }
+               default: return false;
+       }
+}
+
+
+static bool IsDataAccessAllowed(uint8_t blockNo, uint8_t keytype, uint8_t action)
+{
+       uint8_t sector_trailer[16];
+       emlGetMem(sector_trailer, SectorTrailer(blockNo), 1);
+
+       uint8_t sector_block;
+       if (blockNo < 32*4) {
+               sector_block = blockNo & 0x03;
+       } else {
+               sector_block = (blockNo & 0x0f) / 5;
+       }
+
+       uint8_t AC;
+       switch (sector_block) {
+               case 0x00: {
+                       AC = ((sector_trailer[7] >> 2) & 0x04)
+                          | ((sector_trailer[8] << 1) & 0x02)
+                          | ((sector_trailer[8] >> 4) & 0x01);
+                       break;
+               }
+               case 0x01: {
+                       AC = ((sector_trailer[7] >> 3) & 0x04)
+                          | ((sector_trailer[8] >> 0) & 0x02)
+                          | ((sector_trailer[8] >> 5) & 0x01);
+                       break;
+               }
+               case 0x02: {
+                       AC = ((sector_trailer[7] >> 4) & 0x04)
+                          | ((sector_trailer[8] >> 1) & 0x02)
+                          | ((sector_trailer[8] >> 6) & 0x01);
+                       break;
+               }
+               default:
+                       return false;
+       }
 
 
-#define cardSTATE_TO_IDLE() { cardSTATE = MFEMUL_IDLE; LED_B_OFF(); LED_C_OFF(); }
+       switch (action) {
+               case AC_DATA_READ: {
+                       return ((keytype == AUTHKEYA && !(AC == 0x03 || AC == 0x05 || AC == 0x07))
+                                || (keytype == AUTHKEYB && !(AC == 0x07)));
+                       break;
+               }
+               case AC_DATA_WRITE: {
+                       return ((keytype == AUTHKEYA && (AC == 0x00))
+                                || (keytype == AUTHKEYB && (AC == 0x00 || AC == 0x04 || AC == 0x06 || AC == 0x03)));
+                       break;
+               }
+               case AC_DATA_INC: {
+                       return ((keytype == AUTHKEYA && (AC == 0x00))
+                                || (keytype == AUTHKEYB && (AC == 0x00 || AC == 0x06)));
+                       break;
+               }
+               case AC_DATA_DEC_TRANS_REST: {
+                       return ((keytype == AUTHKEYA && (AC == 0x00 || AC == 0x06 || AC == 0x01))
+                                || (keytype == AUTHKEYB && (AC == 0x00 || AC == 0x06 || AC == 0x01)));
+                       break;
+               }
+       }
 
 
+       return false;
+}
 
 
 
 
-static void MifareSimInit(uint8_t flags, uint8_t *datain, tag_response_info_t **responses, uint32_t *cuid, uint8_t *uid_len) {
+static bool IsAccessAllowed(uint8_t blockNo, uint8_t keytype, uint8_t action) {
+       if (IsSectorTrailer(blockNo)) {
+               return IsTrailerAccessAllowed(blockNo, keytype, action);
+       } else {
+               return IsDataAccessAllowed(blockNo, keytype, action);
+       }
+}
+
 
 
-       #define TAG_RESPONSE_COUNT 5                                                            // number of precompiled responses
-       static uint8_t rATQA[]    = {0x04, 0x00};                                       // indicate Mifare classic 1k 4Byte UID
-       static uint8_t rUIDBCC1[] = {0x00, 0x00, 0x00, 0x00, 0x00};     // UID 1st cascade level
-       static uint8_t rUIDBCC2[] = {0x00, 0x00, 0x00, 0x00, 0x00};     // UID 2nd cascade level
-       static uint8_t rSAKfinal[]= {0x08, 0xb6, 0xdd};                         // mifare 1k indicated
-       static uint8_t rSAK1[]    = {0x04, 0xda, 0x17};                         // indicate UID not finished
+static void MifareSimInit(uint8_t flags, uint8_t *datain, tag_response_info_t **responses, uint32_t *cuid, uint8_t *uid_len, uint8_t cardsize) {
+
+       #define TAG_RESPONSE_COUNT 5                                // number of precompiled responses
+       static uint8_t rATQA[]    = {0x00, 0x00};
+       static uint8_t rUIDBCC1[] = {0x00, 0x00, 0x00, 0x00, 0x00}; // UID 1st cascade level
+       static uint8_t rUIDBCC2[] = {0x00, 0x00, 0x00, 0x00, 0x00}; // UID 2nd cascade level
+       static uint8_t rSAKfinal[]= {0x00, 0x00, 0x00};             // SAK after UID complete
+       static uint8_t rSAK1[]    = {0x00, 0x00, 0x00};             // indicate UID not finished
 
        *uid_len = 4;
        // UID can be set from emulator memory or incoming data and can be 4 or 7 bytes long
 
        *uid_len = 4;
        // UID can be set from emulator memory or incoming data and can be 4 or 7 bytes long
-       if (flags & FLAG_4B_UID_IN_DATA) {      // get UID from datain
+       if (flags & FLAG_4B_UID_IN_DATA) {  // get UID from datain
                memcpy(rUIDBCC1, datain, 4);
        } else if (flags & FLAG_7B_UID_IN_DATA) {
                rUIDBCC1[0] = 0x88;
                memcpy(rUIDBCC1, datain, 4);
        } else if (flags & FLAG_7B_UID_IN_DATA) {
                rUIDBCC1[0] = 0x88;
@@ -63,10 +206,10 @@ static void MifareSimInit(uint8_t flags, uint8_t *datain, tag_response_info_t **
                *uid_len = 7;
        } else {
                uint8_t probable_atqa;
                *uid_len = 7;
        } else {
                uint8_t probable_atqa;
-               emlGetMemBt(&probable_atqa, 7, 1);      // get UID from emul memory - weak guess at length
-               if (probable_atqa == 0x00) {            // ---------- 4BUID
+               emlGetMemBt(&probable_atqa, 7, 1);  // get UID from emul memory - weak guess at length
+               if (probable_atqa == 0x00) {        // ---------- 4BUID
                        emlGetMemBt(rUIDBCC1, 0, 4);
                        emlGetMemBt(rUIDBCC1, 0, 4);
-               } else {                                // ---------- 7BUID
+               } else {                            // ---------- 7BUID
                        rUIDBCC1[0] = 0x88;
                        emlGetMemBt(rUIDBCC1+1, 0, 3);
                        emlGetMemBt(rUIDBCC2, 3, 4);
                        rUIDBCC1[0] = 0x88;
                        emlGetMemBt(rUIDBCC1+1, 0, 3);
                        emlGetMemBt(rUIDBCC2, 3, 4);
@@ -78,37 +221,65 @@ static void MifareSimInit(uint8_t flags, uint8_t *datain, tag_response_info_t **
                case 4:
                        *cuid = bytes_to_num(rUIDBCC1, 4);
                        rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
                case 4:
                        *cuid = bytes_to_num(rUIDBCC1, 4);
                        rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
-                       if (MF_DBGLEVEL >= 2)   {
-                               Dbprintf("4B UID: %02x%02x%02x%02x", 
-                                       rUIDBCC1[0], rUIDBCC1[1], rUIDBCC1[2], rUIDBCC1[3]      );
+                       if (MF_DBGLEVEL >= MF_DBG_INFO)   {
+                               Dbprintf("4B UID: %02x%02x%02x%02x",
+                                       rUIDBCC1[0], rUIDBCC1[1], rUIDBCC1[2], rUIDBCC1[3]  );
                        }
                        break;
                case 7:
                        }
                        break;
                case 7:
-                       rATQA[0] |= 0x40;
                        *cuid = bytes_to_num(rUIDBCC2, 4);
                        *cuid = bytes_to_num(rUIDBCC2, 4);
-                       rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3]; 
-                       rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3]; 
-                       if (MF_DBGLEVEL >= 2)   {
+                       rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
+                       rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3];
+                       if (MF_DBGLEVEL >= MF_DBG_INFO)   {
                                Dbprintf("7B UID: %02x %02x %02x %02x %02x %02x %02x",
                                        rUIDBCC1[1], rUIDBCC1[2], rUIDBCC1[3], rUIDBCC2[0], rUIDBCC2[1], rUIDBCC2[2], rUIDBCC2[3]  );
                        }
                        break;
                                Dbprintf("7B UID: %02x %02x %02x %02x %02x %02x %02x",
                                        rUIDBCC1[1], rUIDBCC1[2], rUIDBCC1[3], rUIDBCC2[0], rUIDBCC2[1], rUIDBCC2[2], rUIDBCC2[3]  );
                        }
                        break;
-               default: 
+               default:
                        break;
        }
                        break;
        }
-       
+
+       // set SAK based on cardsize
+       switch (cardsize) {
+               case '0': rSAKfinal[0] = 0x09; break; // Mifare Mini
+               case '2': rSAKfinal[0] = 0x10; break; // Mifare 2K
+               case '4': rSAKfinal[0] = 0x18; break; // Mifare 4K
+               default: rSAKfinal[0] = 0x08;         // Mifare 1K
+       }
+       ComputeCrc14443(CRC_14443_A, rSAKfinal, 1, rSAKfinal + 1, rSAKfinal + 2);
+       if (MF_DBGLEVEL >= MF_DBG_INFO)   {
+               Dbprintf("SAK:    %02x", rSAKfinal[0]);
+       }
+
+       // set SAK for incomplete UID
+       rSAK1[0] = 0x04;                          // Bit 3 indicates incomplete UID
+       ComputeCrc14443(CRC_14443_A, rSAK1, 1, rSAK1 + 1, rSAK1 + 2);
+
+       // set ATQA based on cardsize and UIDlen
+       if (cardsize == '4') {
+               rATQA[0] = 0x02;
+       } else {
+               rATQA[0] = 0x04;
+       }
+       if (*uid_len == 7) {
+               rATQA[0] |= 0x40;
+       }
+       if (MF_DBGLEVEL >= MF_DBG_INFO)   {
+               Dbprintf("ATQA:   %02x %02x", rATQA[1], rATQA[0]);
+       }
+
        static tag_response_info_t responses_init[TAG_RESPONSE_COUNT] = {
        static tag_response_info_t responses_init[TAG_RESPONSE_COUNT] = {
-               { .response = rATQA,     .response_n = sizeof(rATQA)  },                // Answer to request - respond with card type
-               { .response = rUIDBCC1,  .response_n = sizeof(rUIDBCC1) },              // Anticollision cascade1 - respond with first part of uid
-               { .response = rUIDBCC2,  .response_n = sizeof(rUIDBCC2) },              // Anticollision cascade2 - respond with 2nd part of uid 
-               { .response = rSAKfinal, .response_n = sizeof(rSAKfinal)  },    // Acknowledge select - last cascade
-               { .response = rSAK1,     .response_n = sizeof(rSAK1) }                  // Acknowledge select - previous cascades
+               { .response = rATQA,     .response_n = sizeof(rATQA)  },        // Answer to request - respond with card type
+               { .response = rUIDBCC1,  .response_n = sizeof(rUIDBCC1) },      // Anticollision cascade1 - respond with first part of uid
+               { .response = rUIDBCC2,  .response_n = sizeof(rUIDBCC2) },      // Anticollision cascade2 - respond with 2nd part of uid
+               { .response = rSAKfinal, .response_n = sizeof(rSAKfinal)  },    // Acknowledge select - last cascade
+               { .response = rSAK1,     .response_n = sizeof(rSAK1) }          // Acknowledge select - previous cascades
        };
 
        // Prepare ("precompile") the responses of the anticollision phase. There will be not enough time to do this at the moment the reader sends its REQA or SELECT
        };
 
        // Prepare ("precompile") the responses of the anticollision phase. There will be not enough time to do this at the moment the reader sends its REQA or SELECT
-       // There are 7 predefined responses with a total of 18 bytes data to transmit. Coded responses need one byte per bit to transfer (data, parity, start, stop, correction) 
+       // There are 5 predefined responses with a total of 18 bytes data to transmit. Coded responses need one byte per bit to transfer (data, parity, start, stop, correction)
        // 18 * 8 data bits, 18 * 1 parity bits, 5 start bits, 5 stop bits, 5 correction bits  ->   need 177 bytes buffer
        // 18 * 8 data bits, 18 * 1 parity bits, 5 start bits, 5 stop bits, 5 correction bits  ->   need 177 bytes buffer
-       #define ALLOCATED_TAG_MODULATION_BUFFER_SIZE 177        // number of bytes required for precompiled responses
+       #define ALLOCATED_TAG_MODULATION_BUFFER_SIZE 177    // number of bytes required for precompiled responses
 
        uint8_t *free_buffer_pointer = BigBuf_malloc(ALLOCATED_TAG_MODULATION_BUFFER_SIZE);
        size_t free_buffer_size = ALLOCATED_TAG_MODULATION_BUFFER_SIZE;
 
        uint8_t *free_buffer_pointer = BigBuf_malloc(ALLOCATED_TAG_MODULATION_BUFFER_SIZE);
        size_t free_buffer_size = ALLOCATED_TAG_MODULATION_BUFFER_SIZE;
@@ -136,74 +307,74 @@ static bool HasValidCRC(uint8_t *receivedCmd, uint16_t receivedCmd_len) {
 
 
 /**
 
 
 /**
-  *MIFARE 1K simulate.
+  *MIFARE simulate.
   *
   *@param flags :
   *
   *@param flags :
-  *    FLAG_INTERACTIVE - In interactive mode, we are expected to finish the operation with an ACK
+  * FLAG_INTERACTIVE - In interactive mode, we are expected to finish the operation with an ACK
   * FLAG_4B_UID_IN_DATA - means that there is a 4-byte UID in the data-section, we're expected to use that
   * FLAG_7B_UID_IN_DATA - means that there is a 7-byte UID in the data-section, we're expected to use that
   * FLAG_4B_UID_IN_DATA - means that there is a 4-byte UID in the data-section, we're expected to use that
   * FLAG_7B_UID_IN_DATA - means that there is a 7-byte UID in the data-section, we're expected to use that
-  * FLAG_10B_UID_IN_DATA       - use 10-byte UID in the data-section not finished
-  *    FLAG_NR_AR_ATTACK  - means we should collect NR_AR responses for bruteforcing later
+  * FLAG_NR_AR_ATTACK  - means we should collect NR_AR responses for bruteforcing later
   * FLAG_RANDOM_NONCE - means we should generate some pseudo-random nonce data (only allows moebius attack)
   *@param exitAfterNReads, exit simulation after n blocks have been read, 0 is infinite ...
   * (unless reader attack mode enabled then it runs util it gets enough nonces to recover all keys attmpted)
   */
   * FLAG_RANDOM_NONCE - means we should generate some pseudo-random nonce data (only allows moebius attack)
   *@param exitAfterNReads, exit simulation after n blocks have been read, 0 is infinite ...
   * (unless reader attack mode enabled then it runs util it gets enough nonces to recover all keys attmpted)
   */
-void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *datain)
+void MifareSim(uint8_t flags, uint8_t exitAfterNReads, uint8_t cardsize, uint8_t *datain)
 {
 {
+       LED_A_ON();
+
        tag_response_info_t *responses;
        tag_response_info_t *responses;
-       uint8_t uid_len = 4; 
+       uint8_t uid_len = 4;
        uint32_t cuid = 0;
        uint8_t cardWRBL = 0;
        uint8_t cardAUTHSC = 0;
        uint32_t cuid = 0;
        uint8_t cardWRBL = 0;
        uint8_t cardAUTHSC = 0;
-       uint8_t cardAUTHKEY = 0xff;  // no authentication
+       uint8_t cardAUTHKEY = AUTHKEYNONE;  // no authentication
        uint32_t cardRr = 0;
        //uint32_t rn_enc = 0;
        uint32_t ans = 0;
        uint32_t cardINTREG = 0;
        uint8_t cardINTBLOCK = 0;
        struct Crypto1State mpcs = {0, 0};
        uint32_t cardRr = 0;
        //uint32_t rn_enc = 0;
        uint32_t ans = 0;
        uint32_t cardINTREG = 0;
        uint8_t cardINTBLOCK = 0;
        struct Crypto1State mpcs = {0, 0};
-       struct Crypto1State *pcs;
-       pcs = &mpcs;
-       uint32_t numReads = 0;//Counts numer of times reader reads a block
+       struct Crypto1State *pcs = &mpcs;
+       uint32_t numReads = 0; //Counts numer of times reader reads a block
        uint8_t receivedCmd[MAX_MIFARE_FRAME_SIZE];
        uint8_t receivedCmd_dec[MAX_MIFARE_FRAME_SIZE];
        uint8_t receivedCmd_par[MAX_MIFARE_PARITY_SIZE];
        uint16_t receivedCmd_len;
        uint8_t response[MAX_MIFARE_FRAME_SIZE];
        uint8_t response_par[MAX_MIFARE_PARITY_SIZE];
        uint8_t receivedCmd[MAX_MIFARE_FRAME_SIZE];
        uint8_t receivedCmd_dec[MAX_MIFARE_FRAME_SIZE];
        uint8_t receivedCmd_par[MAX_MIFARE_PARITY_SIZE];
        uint16_t receivedCmd_len;
        uint8_t response[MAX_MIFARE_FRAME_SIZE];
        uint8_t response_par[MAX_MIFARE_PARITY_SIZE];
-       
-       uint8_t rAUTH_NT[] = {0x01, 0x02, 0x03, 0x04};
-       uint8_t rAUTH_AT[] = {0x00, 0x00, 0x00, 0x00};
-               
-       //Here, we collect UID,sector,keytype,NT,AR,NR,NT2,AR2,NR2
+       uint8_t fixed_nonce[] = {0x01, 0x02, 0x03, 0x04};
+
+       int num_blocks = ParamCardSizeBlocks(cardsize);
+
+       // Here we collect UID, sector, keytype, NT, AR, NR, NT2, AR2, NR2
        // This will be used in the reader-only attack.
 
        // This will be used in the reader-only attack.
 
-       //allow collecting up to 7 sets of nonces to allow recovery of up to 7 keys
+       // allow collecting up to 7 sets of nonces to allow recovery of up to 7 keys
        #define ATTACK_KEY_COUNT 7 // keep same as define in cmdhfmf.c -> readerAttack() (Cannot be more than 7)
        #define ATTACK_KEY_COUNT 7 // keep same as define in cmdhfmf.c -> readerAttack() (Cannot be more than 7)
-       nonces_t ar_nr_resp[ATTACK_KEY_COUNT*2]; //*2 for 2 separate attack types (nml, moebius) 36 * 7 * 2 bytes = 504 bytes
+       nonces_t ar_nr_resp[ATTACK_KEY_COUNT*2]; // *2 for 2 separate attack types (nml, moebius) 36 * 7 * 2 bytes = 504 bytes
        memset(ar_nr_resp, 0x00, sizeof(ar_nr_resp));
 
        memset(ar_nr_resp, 0x00, sizeof(ar_nr_resp));
 
-       uint8_t ar_nr_collected[ATTACK_KEY_COUNT*2]; //*2 for 2nd attack type (moebius)
+       uint8_t ar_nr_collected[ATTACK_KEY_COUNT*2]; // *2 for 2nd attack type (moebius)
        memset(ar_nr_collected, 0x00, sizeof(ar_nr_collected));
        memset(ar_nr_collected, 0x00, sizeof(ar_nr_collected));
-       uint8_t nonce1_count = 0;
-       uint8_t nonce2_count = 0;
-       uint8_t moebius_n_count = 0;
+       uint8_t nonce1_count = 0;
+       uint8_t nonce2_count = 0;
+       uint8_t moebius_n_count = 0;
        bool gettingMoebius = false;
        bool gettingMoebius = false;
-       uint8_t mM = 0; //moebius_modifier for collection storage
+       uint8_t mM = 0; // moebius_modifier for collection storage
 
        // Authenticate response - nonce
        uint32_t nonce;
        if (flags & FLAG_RANDOM_NONCE) {
                nonce = prand();
        } else {
 
        // Authenticate response - nonce
        uint32_t nonce;
        if (flags & FLAG_RANDOM_NONCE) {
                nonce = prand();
        } else {
-               nonce = bytes_to_num(rAUTH_NT, 4);
+               nonce = bytes_to_num(fixed_nonce, 4);
        }
 
        // free eventually allocated BigBuf memory but keep Emulator Memory
        BigBuf_free_keep_EM();
 
        }
 
        // free eventually allocated BigBuf memory but keep Emulator Memory
        BigBuf_free_keep_EM();
 
-       MifareSimInit(flags, datain, &responses, &cuid, &uid_len);
-       
+       MifareSimInit(flags, datain, &responses, &cuid, &uid_len, cardsize);
+
        // We need to listen to the high-frequency, peak-detected path.
        iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN);
 
        // We need to listen to the high-frequency, peak-detected path.
        iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN);
 
@@ -211,7 +382,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
        clear_trace();
        set_tracing(true);
        ResetSspClk();
        clear_trace();
        set_tracing(true);
        ResetSspClk();
-       
+
        bool finished = false;
        bool button_pushed = BUTTON_PRESS();
        int cardSTATE = MFEMUL_NOFIELD;
        bool finished = false;
        bool button_pushed = BUTTON_PRESS();
        int cardSTATE = MFEMUL_NOFIELD;
@@ -219,102 +390,108 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
        while (!button_pushed && !finished && !usb_poll_validate_length()) {
                WDT_HIT();
 
        while (!button_pushed && !finished && !usb_poll_validate_length()) {
                WDT_HIT();
 
-               // find reader field
                if (cardSTATE == MFEMUL_NOFIELD) {
                if (cardSTATE == MFEMUL_NOFIELD) {
-                       int vHf = (MAX_ADC_HF_VOLTAGE * AvgAdc(ADC_CHAN_HF)) >> 10;
+                       // wait for reader HF field
+                       int vHf = (MAX_ADC_HF_VOLTAGE_LOW * AvgAdc(ADC_CHAN_HF_LOW)) >> 10;
                        if (vHf > MF_MINFIELDV) {
                        if (vHf > MF_MINFIELDV) {
-                               LED_A_ON();
-                               cardSTATE_TO_IDLE();
+                               LED_D_ON();
+                               cardSTATE = MFEMUL_IDLE;
                        }
                        button_pushed = BUTTON_PRESS();
                        continue;
                }
 
                //Now, get data
                        }
                        button_pushed = BUTTON_PRESS();
                        continue;
                }
 
                //Now, get data
+               FpgaEnableTracing();
                int res = EmGetCmd(receivedCmd, &receivedCmd_len, receivedCmd_par);
                int res = EmGetCmd(receivedCmd, &receivedCmd_len, receivedCmd_par);
-               
-               if (res == 2) { //Field is off!
-                       LEDsoff();
+
+               if (res == 2) { //  Reader has dropped the HF field. Power off.
+                       FpgaDisableTracing();
+                       LED_D_OFF();
                        cardSTATE = MFEMUL_NOFIELD;
                        continue;
                } else if (res == 1) { // button pressed
                        cardSTATE = MFEMUL_NOFIELD;
                        continue;
                } else if (res == 1) { // button pressed
+                       FpgaDisableTracing();
                        button_pushed = true;
                        break;
                }
 
                // WUPA in HALTED state or REQA or WUPA in any other state
                if (receivedCmd_len == 1 && ((receivedCmd[0] == ISO14443A_CMD_REQA && cardSTATE != MFEMUL_HALTED) || receivedCmd[0] == ISO14443A_CMD_WUPA)) {
                        button_pushed = true;
                        break;
                }
 
                // WUPA in HALTED state or REQA or WUPA in any other state
                if (receivedCmd_len == 1 && ((receivedCmd[0] == ISO14443A_CMD_REQA && cardSTATE != MFEMUL_HALTED) || receivedCmd[0] == ISO14443A_CMD_WUPA)) {
-                       EmSendPrecompiledCmd(&responses[ATQA], (receivedCmd[0] == ISO14443A_CMD_WUPA));
+                       EmSendPrecompiledCmd(&responses[ATQA]);
+                       FpgaDisableTracing();
 
                        // init crypto block
                        crypto1_destroy(pcs);
 
                        // init crypto block
                        crypto1_destroy(pcs);
-                       cardAUTHKEY = 0xff;
+                       cardAUTHKEY = AUTHKEYNONE;
                        if (flags & FLAG_RANDOM_NONCE) {
                                nonce = prand();
                        }
                        if (flags & FLAG_RANDOM_NONCE) {
                                nonce = prand();
                        }
-                       LED_B_OFF();
-                       LED_C_OFF();
                        cardSTATE = MFEMUL_SELECT1;
                        continue;
                }
                        cardSTATE = MFEMUL_SELECT1;
                        continue;
                }
-               
+
                switch (cardSTATE) {
                        case MFEMUL_NOFIELD:
                        case MFEMUL_HALTED:
                        case MFEMUL_IDLE:{
                                break;
                        }
                switch (cardSTATE) {
                        case MFEMUL_NOFIELD:
                        case MFEMUL_HALTED:
                        case MFEMUL_IDLE:{
                                break;
                        }
+
                        case MFEMUL_SELECT1:{
                                // select all - 0x93 0x20
                                if (receivedCmd_len == 2 && (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && receivedCmd[1] == 0x20)) {
                        case MFEMUL_SELECT1:{
                                // select all - 0x93 0x20
                                if (receivedCmd_len == 2 && (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && receivedCmd[1] == 0x20)) {
-                                       if (MF_DBGLEVEL >= 4)   Dbprintf("SELECT ALL CL1 received");
-                                       EmSendPrecompiledCmd(&responses[UIDBCC1], false);
+                                       EmSendPrecompiledCmd(&responses[UIDBCC1]);
+                                       FpgaDisableTracing();
+                                       if (MF_DBGLEVEL >= MF_DBG_EXTENDED)   Dbprintf("SELECT ALL CL1 received");
                                        break;
                                }
                                // select card - 0x93 0x70 ...
                                if (receivedCmd_len == 9 &&
                                                (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], responses[UIDBCC1].response, 4) == 0)) {
                                        break;
                                }
                                // select card - 0x93 0x70 ...
                                if (receivedCmd_len == 9 &&
                                                (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], responses[UIDBCC1].response, 4) == 0)) {
-                                       if (MF_DBGLEVEL >= 4) Dbprintf("SELECT CL1 %02x%02x%02x%02x received",receivedCmd[2],receivedCmd[3],receivedCmd[4],receivedCmd[5]);
                                        if (uid_len == 4) {
                                        if (uid_len == 4) {
-                                               EmSendPrecompiledCmd(&responses[SAKfinal], false);
-                                               LED_B_ON();
+                                               EmSendPrecompiledCmd(&responses[SAKfinal]);
                                                cardSTATE = MFEMUL_WORK;
                                                cardSTATE = MFEMUL_WORK;
-                                               break;
                                        } else if (uid_len == 7) {
                                        } else if (uid_len == 7) {
-                                               EmSendPrecompiledCmd(&responses[SAK1], false);
-                                               cardSTATE       = MFEMUL_SELECT2;
-                                               break;
+                                               EmSendPrecompiledCmd(&responses[SAK1]);
+                                               cardSTATE = MFEMUL_SELECT2;
                                        }
                                        }
+                                       FpgaDisableTracing();
+                                       if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("SELECT CL1 %02x%02x%02x%02x received",receivedCmd[2],receivedCmd[3],receivedCmd[4],receivedCmd[5]);
+                                       break;
                                }
                                }
-                               cardSTATE_TO_IDLE();
+                               cardSTATE = MFEMUL_IDLE;
                                break;
                        }
                                break;
                        }
+
                        case MFEMUL_SELECT2:{
                                // select all cl2 - 0x95 0x20
                                if (receivedCmd_len == 2 && (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && receivedCmd[1] == 0x20)) {
                        case MFEMUL_SELECT2:{
                                // select all cl2 - 0x95 0x20
                                if (receivedCmd_len == 2 && (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && receivedCmd[1] == 0x20)) {
-                                       if (MF_DBGLEVEL >= 4)   Dbprintf("SELECT ALL CL2 received");
-                                       EmSendPrecompiledCmd(&responses[UIDBCC2], false);
+                                       EmSendPrecompiledCmd(&responses[UIDBCC2]);
+                                       FpgaDisableTracing();
+                                       if (MF_DBGLEVEL >= MF_DBG_EXTENDED)   Dbprintf("SELECT ALL CL2 received");
                                        break;
                                }
                                // select cl2 card - 0x95 0x70 xxxxxxxxxxxx
                                        break;
                                }
                                // select cl2 card - 0x95 0x70 xxxxxxxxxxxx
-                               if (receivedCmd_len == 9 && 
+                               if (receivedCmd_len == 9 &&
                                                (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], responses[UIDBCC2].response, 4) == 0)) {
                                        if (uid_len == 7) {
                                                (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], responses[UIDBCC2].response, 4) == 0)) {
                                        if (uid_len == 7) {
-                                               if (MF_DBGLEVEL >= 4) Dbprintf("SELECT CL2 %02x%02x%02x%02x received",receivedCmd[2],receivedCmd[3],receivedCmd[4],receivedCmd[5]);
-                                               EmSendPrecompiledCmd(&responses[SAKfinal], false);
-                                               LED_B_ON();
+                                               EmSendPrecompiledCmd(&responses[SAKfinal]);
+                                               FpgaDisableTracing();
+                                               if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("SELECT CL2 %02x%02x%02x%02x received",receivedCmd[2],receivedCmd[3],receivedCmd[4],receivedCmd[5]);
                                                cardSTATE = MFEMUL_WORK;
                                                break;
                                        }
                                }
                                                cardSTATE = MFEMUL_WORK;
                                                break;
                                        }
                                }
-                               cardSTATE_TO_IDLE();
+                               cardSTATE = MFEMUL_IDLE;
                                break;
                        }
                                break;
                        }
+
                        case MFEMUL_WORK:{
                        case MFEMUL_WORK:{
-                               if (receivedCmd_len != 4) {     // all commands must have exactly 4 bytes
+                               if (receivedCmd_len != 4) { // all commands must have exactly 4 bytes
                                        break;
                                }
                                        break;
                                }
-                               bool encrypted_data = (cardAUTHKEY != 0xFF) ;
+                               bool encrypted_data = (cardAUTHKEY != AUTHKEYNONE) ;
                                if (encrypted_data) {
                                        // decrypt seqence
                                        mf_crypto1_decryptEx(pcs, receivedCmd, receivedCmd_len, receivedCmd_dec);
                                if (encrypted_data) {
                                        // decrypt seqence
                                        mf_crypto1_decryptEx(pcs, receivedCmd, receivedCmd_len, receivedCmd_dec);
@@ -322,62 +499,92 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                                        memcpy(receivedCmd_dec, receivedCmd, receivedCmd_len);
                                }
                                if (!HasValidCRC(receivedCmd_dec, receivedCmd_len)) { // all commands must have a valid CRC
                                        memcpy(receivedCmd_dec, receivedCmd, receivedCmd_len);
                                }
                                if (!HasValidCRC(receivedCmd_dec, receivedCmd_len)) { // all commands must have a valid CRC
-                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_TR));
                                        break;
                                }
                                        break;
                                }
+
                                if (receivedCmd_dec[0] == MIFARE_AUTH_KEYA || receivedCmd_dec[0] == MIFARE_AUTH_KEYB) {
                                        // if authenticating to a block that shouldn't exist - as long as we are not doing the reader attack
                                if (receivedCmd_dec[0] == MIFARE_AUTH_KEYA || receivedCmd_dec[0] == MIFARE_AUTH_KEYB) {
                                        // if authenticating to a block that shouldn't exist - as long as we are not doing the reader attack
-                                       if (receivedCmd_dec[1] >= 16 * 4 && !(flags & FLAG_NR_AR_ATTACK)) {
+                                       if (receivedCmd_dec[1] >= num_blocks && !(flags & FLAG_NR_AR_ATTACK)) {
                                                //is this the correct response to an auth on a out of range block? marshmellow
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
                                                //is this the correct response to an auth on a out of range block? marshmellow
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                               if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate (0x%02x) on out of range block: %d (0x%02x), nacking",receivedCmd_dec[0],receivedCmd_dec[1],receivedCmd_dec[1]);
+                                               FpgaDisableTracing();
+                                               if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("Reader tried to operate (0x%02x) on out of range block: %d (0x%02x), nacking", receivedCmd_dec[0], receivedCmd_dec[1], receivedCmd_dec[1]);
                                                break;
                                        }
                                                break;
                                        }
-                                       cardAUTHSC = receivedCmd_dec[1] / 4;  // received block num
+                                       cardAUTHSC = BlockToSector(receivedCmd_dec[1]);  // received block num
                                        cardAUTHKEY = receivedCmd_dec[0] & 0x01;
                                        crypto1_destroy(pcs);//Added by martin
                                        crypto1_create(pcs, emlGetKey(cardAUTHSC, cardAUTHKEY));
                                        if (!encrypted_data) { // first authentication
                                        cardAUTHKEY = receivedCmd_dec[0] & 0x01;
                                        crypto1_destroy(pcs);//Added by martin
                                        crypto1_create(pcs, emlGetKey(cardAUTHSC, cardAUTHKEY));
                                        if (!encrypted_data) { // first authentication
-                                               if (MF_DBGLEVEL >= 4) Dbprintf("Reader authenticating for block %d (0x%02x) with key %d",receivedCmd_dec[1], receivedCmd_dec[1], cardAUTHKEY);
-                                               crypto1_word(pcs, cuid ^ nonce, 0);//Update crypto state
-                                               num_to_bytes(nonce, 4, rAUTH_AT); // Send nonce
+                                               crypto1_word(pcs, cuid ^ nonce, 0); // Update crypto state
+                                               num_to_bytes(nonce, 4, response);   // Send unencrypted nonce
+                                               EmSendCmd(response, sizeof(nonce));
+                                               FpgaDisableTracing();
+                                               if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("Reader authenticating for block %d (0x%02x) with key %d", receivedCmd_dec[1], receivedCmd_dec[1], cardAUTHKEY);
                                        } else { // nested authentication
                                        } else { // nested authentication
-                                               if (MF_DBGLEVEL >= 4) Dbprintf("Reader doing nested authentication for block %d (0x%02x) with key %d", receivedCmd_dec[1], receivedCmd_dec[1], cardAUTHKEY);
-                                               ans = nonce ^ crypto1_word(pcs, cuid ^ nonce, 0); 
-                                               num_to_bytes(ans, 4, rAUTH_AT);
+                                               num_to_bytes(nonce, sizeof(nonce), response);
+                                               uint8_t pcs_in[4] = {0};
+                                               num_to_bytes(cuid ^ nonce, sizeof(nonce), pcs_in);
+                                               mf_crypto1_encryptEx(pcs, response, pcs_in, sizeof(nonce), response_par);
+                                               EmSendCmdPar(response, sizeof(nonce), response_par); // send encrypted nonce
+                                               FpgaDisableTracing();
+                                               if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("Reader doing nested authentication for block %d (0x%02x) with key %d", receivedCmd_dec[1], receivedCmd_dec[1], cardAUTHKEY);
                                        }
                                        }
-                                       EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
                                        cardSTATE = MFEMUL_AUTH1;
                                        break;
                                }
                                        cardSTATE = MFEMUL_AUTH1;
                                        break;
                                }
-                               if (!encrypted_data) { // all other commands must be encrypted (authenticated)
+
+                               // halt can be sent encrypted or in clear
+                               if (receivedCmd_dec[0] == ISO14443A_CMD_HALT && receivedCmd_dec[1] == 0x00) {
+                                       if (MF_DBGLEVEL >= MF_DBG_EXTENDED)   Dbprintf("--> HALTED.");
+                                       cardSTATE = MFEMUL_HALTED;
                                        break;
                                }
                                        break;
                                }
-                               if(receivedCmd_dec[0] == ISO14443A_CMD_READBLOCK
-                                       || receivedCmd_dec[0] == ISO14443A_CMD_WRITEBLOCK
+
+                               if(receivedCmd_dec[0] == MIFARE_CMD_READBLOCK
+                                       || receivedCmd_dec[0] == MIFARE_CMD_WRITEBLOCK
                                        || receivedCmd_dec[0] == MIFARE_CMD_INC
                                        || receivedCmd_dec[0] == MIFARE_CMD_DEC
                                        || receivedCmd_dec[0] == MIFARE_CMD_RESTORE
                                        || receivedCmd_dec[0] == MIFARE_CMD_TRANSFER) {
                                        || receivedCmd_dec[0] == MIFARE_CMD_INC
                                        || receivedCmd_dec[0] == MIFARE_CMD_DEC
                                        || receivedCmd_dec[0] == MIFARE_CMD_RESTORE
                                        || receivedCmd_dec[0] == MIFARE_CMD_TRANSFER) {
-                                       if (receivedCmd_dec[1] >= 16 * 4) {
+                                       if (receivedCmd_dec[1] >= num_blocks) {
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                               if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate (0x%02x) on out of range block: %d (0x%02x), nacking",receivedCmd_dec[0],receivedCmd_dec[1],receivedCmd_dec[1]);
+                                               FpgaDisableTracing();
+                                               if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("Reader tried to operate (0x%02x) on out of range block: %d (0x%02x), nacking",receivedCmd_dec[0],receivedCmd_dec[1],receivedCmd_dec[1]);
                                                break;
                                        }
                                                break;
                                        }
-                                       if (receivedCmd_dec[1] / 4 != cardAUTHSC) {
+                                       if (BlockToSector(receivedCmd_dec[1]) != cardAUTHSC) {
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                               if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate (0x%02x) on block (0x%02x) not authenticated for (0x%02x), nacking",receivedCmd_dec[0],receivedCmd_dec[1],cardAUTHSC);
+                                               FpgaDisableTracing();
+                                               if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("Reader tried to operate (0x%02x) on block (0x%02x) not authenticated for (0x%02x), nacking",receivedCmd_dec[0],receivedCmd_dec[1],cardAUTHSC);
                                                break;
                                        }
                                }
                                                break;
                                        }
                                }
-                               if (receivedCmd_dec[0] == ISO14443A_CMD_READBLOCK) {
-                                       if (MF_DBGLEVEL >= 4) {
-                                               Dbprintf("Reader reading block %d (0x%02x)",receivedCmd_dec[1],receivedCmd_dec[1]);
+
+                               if (receivedCmd_dec[0] == MIFARE_CMD_READBLOCK) {
+                                       uint8_t blockNo = receivedCmd_dec[1];
+                                       emlGetMem(response, blockNo, 1);
+                                       if (IsSectorTrailer(blockNo)) {
+                                               memset(response, 0x00, 6);  // keyA can never be read
+                                               if (!IsAccessAllowed(blockNo, cardAUTHKEY, AC_KEYB_READ)) {
+                                                       memset(response+10, 0x00, 6);   // keyB cannot be read
+                                               }
+                                               if (!IsAccessAllowed(blockNo, cardAUTHKEY, AC_AC_READ)) {
+                                                       memset(response+6, 0x00, 4);    // AC bits cannot be read
+                                               }
+                                       } else {
+                                               if (!IsAccessAllowed(blockNo, cardAUTHKEY, AC_DATA_READ)) {
+                                                       memset(response, 0x00, 16);     // datablock cannot be read
+                                               }
                                        }
                                        }
-                                       emlGetMem(response, receivedCmd_dec[1], 1);
                                        AppendCrc14443a(response, 16);
                                        mf_crypto1_encrypt(pcs, response, 18, response_par);
                                        EmSendCmdPar(response, 18, response_par);
                                        AppendCrc14443a(response, 16);
                                        mf_crypto1_encrypt(pcs, response, 18, response_par);
                                        EmSendCmdPar(response, 18, response_par);
+                                       FpgaDisableTracing();
+                                       if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
+                                               Dbprintf("Reader reading block %d (0x%02x)", blockNo, blockNo);
+                                       }
                                        numReads++;
                                        if(exitAfterNReads > 0 && numReads == exitAfterNReads) {
                                                Dbprintf("%d reads done, exiting", numReads);
                                        numReads++;
                                        if(exitAfterNReads > 0 && numReads == exitAfterNReads) {
                                                Dbprintf("%d reads done, exiting", numReads);
@@ -385,22 +592,34 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                                        }
                                        break;
                                }
                                        }
                                        break;
                                }
-                               if (receivedCmd_dec[0] == ISO14443A_CMD_WRITEBLOCK) {
-                                       if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0xA0 write block %d (%02x)",receivedCmd_dec[1],receivedCmd_dec[1]);
+
+                               if (receivedCmd_dec[0] == MIFARE_CMD_WRITEBLOCK) {
+                                       uint8_t blockNo = receivedCmd_dec[1];
                                        EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
                                        EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
-                                       cardWRBL = receivedCmd_dec[1];
+                                       FpgaDisableTracing();
+                                       if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("RECV 0xA0 write block %d (%02x)", blockNo, blockNo);
+                                       cardWRBL = blockNo;
                                        cardSTATE = MFEMUL_WRITEBL2;
                                        break;
                                }
                                        cardSTATE = MFEMUL_WRITEBL2;
                                        break;
                                }
+
                                if (receivedCmd_dec[0] == MIFARE_CMD_INC || receivedCmd_dec[0] == MIFARE_CMD_DEC || receivedCmd_dec[0] == MIFARE_CMD_RESTORE) {
                                if (receivedCmd_dec[0] == MIFARE_CMD_INC || receivedCmd_dec[0] == MIFARE_CMD_DEC || receivedCmd_dec[0] == MIFARE_CMD_RESTORE) {
-                                       if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0x%02x inc(0xC1)/dec(0xC0)/restore(0xC2) block %d (%02x)",receivedCmd_dec[0],receivedCmd_dec[1],receivedCmd_dec[1]);
-                                       if (emlCheckValBl(receivedCmd_dec[1])) {
-                                               if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate on block, but emlCheckValBl failed, nacking");
+                                       uint8_t blockNo = receivedCmd_dec[1];
+                                       if (emlCheckValBl(blockNo)) {
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+                                               FpgaDisableTracing();
+                                               if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
+                                                       Dbprintf("RECV 0x%02x inc(0xC1)/dec(0xC0)/restore(0xC2) block %d (%02x)",receivedCmd_dec[0], blockNo, blockNo);
+                                               }
+                                               if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("Reader tried to operate on block, but emlCheckValBl failed, nacking");
                                                break;
                                        }
                                        EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
                                                break;
                                        }
                                        EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
-                                       cardWRBL = receivedCmd_dec[1];
+                                       FpgaDisableTracing();
+                                       if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
+                                               Dbprintf("RECV 0x%02x inc(0xC1)/dec(0xC0)/restore(0xC2) block %d (%02x)",receivedCmd_dec[0], blockNo, blockNo);
+                                       }
+                                       cardWRBL = blockNo;
                                        if (receivedCmd_dec[0] == MIFARE_CMD_INC)
                                                cardSTATE = MFEMUL_INTREG_INC;
                                        if (receivedCmd_dec[0] == MIFARE_CMD_DEC)
                                        if (receivedCmd_dec[0] == MIFARE_CMD_INC)
                                                cardSTATE = MFEMUL_INTREG_INC;
                                        if (receivedCmd_dec[0] == MIFARE_CMD_DEC)
@@ -409,30 +628,29 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                                                cardSTATE = MFEMUL_INTREG_REST;
                                        break;
                                }
                                                cardSTATE = MFEMUL_INTREG_REST;
                                        break;
                                }
+
                                if (receivedCmd_dec[0] == MIFARE_CMD_TRANSFER) {
                                if (receivedCmd_dec[0] == MIFARE_CMD_TRANSFER) {
-                                       if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0x%02x transfer block %d (%02x)",receivedCmd_dec[0],receivedCmd_dec[1],receivedCmd_dec[1]);
+                                       uint8_t blockNo = receivedCmd_dec[1];
                                        if (emlSetValBl(cardINTREG, cardINTBLOCK, receivedCmd_dec[1]))
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
                                        else
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
                                        if (emlSetValBl(cardINTREG, cardINTBLOCK, receivedCmd_dec[1]))
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
                                        else
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
+                                       FpgaDisableTracing();
+                                       if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("RECV 0x%02x transfer block %d (%02x)",receivedCmd_dec[0], blockNo, blockNo);
                                        break;
                                }
                                        break;
                                }
-                               // halt
-                               if (receivedCmd_dec[0] == ISO14443A_CMD_HALT && receivedCmd_dec[1] == 0x00) {
-                                       if (MF_DBGLEVEL >= 4)   Dbprintf("--> HALTED.");
-                                       LED_B_OFF();
-                                       LED_C_OFF();
-                                       cardSTATE = MFEMUL_HALTED;
-                                       break;
-                               }
+
                                // command not allowed
                                // command not allowed
-                               if (MF_DBGLEVEL >= 4)   Dbprintf("Received command not allowed, nacking");
                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+                               FpgaDisableTracing();
+                               if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("Received command not allowed, nacking");
+                               cardSTATE = MFEMUL_IDLE;
                                break;
                        }
                                break;
                        }
+
                        case MFEMUL_AUTH1:{
                                if (receivedCmd_len != 8) {
                        case MFEMUL_AUTH1:{
                                if (receivedCmd_len != 8) {
-                                       cardSTATE_TO_IDLE();
+                                       cardSTATE = MFEMUL_IDLE;
                                        break;
                                }
 
                                        break;
                                }
 
@@ -447,7 +665,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                                                        if (ar_nr_collected[i+mM] < 2) {
                                                                // if we haven't already collected 2 nonces for this sector
                                                                if (ar_nr_resp[ar_nr_collected[i+mM]].ar != ar) {
                                                        if (ar_nr_collected[i+mM] < 2) {
                                                                // if we haven't already collected 2 nonces for this sector
                                                                if (ar_nr_resp[ar_nr_collected[i+mM]].ar != ar) {
-                                                                       // Avoid duplicates... probably not necessary, ar should vary. 
+                                                                       // Avoid duplicates... probably not necessary, ar should vary.
                                                                        if (ar_nr_collected[i+mM]==0) {
                                                                                // first nonce collect
                                                                                ar_nr_resp[i+mM].cuid = cuid;
                                                                        if (ar_nr_collected[i+mM]==0) {
                                                                                // first nonce collect
                                                                                ar_nr_resp[i+mM].cuid = cuid;
@@ -475,7 +693,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                                                                                        if ( nonce2_count == nonce1_count ) {
                                                                                                // done collecting std test switch to moebius
                                                                                                // first finish incrementing last sample
                                                                                        if ( nonce2_count == nonce1_count ) {
                                                                                                // done collecting std test switch to moebius
                                                                                                // first finish incrementing last sample
-                                                                                               ar_nr_collected[i+mM]++; 
+                                                                                               ar_nr_collected[i+mM]++;
                                                                                                // switch to moebius collection
                                                                                                gettingMoebius = true;
                                                                                                mM = ATTACK_KEY_COUNT;
                                                                                                // switch to moebius collection
                                                                                                gettingMoebius = true;
                                                                                                mM = ATTACK_KEY_COUNT;
@@ -507,83 +725,109 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
 
                                // test if auth OK
                                if (cardRr != prng_successor(nonce, 64)){
 
                                // test if auth OK
                                if (cardRr != prng_successor(nonce, 64)){
-                                       if (MF_DBGLEVEL >= 2) Dbprintf("AUTH FAILED for sector %d with key %c. cardRr=%08x, succ=%08x",
-                                                       cardAUTHSC, cardAUTHKEY == 0 ? 'A' : 'B',
+                                       FpgaDisableTracing();
+                                       if (MF_DBGLEVEL >= MF_DBG_EXTENDED) Dbprintf("AUTH FAILED for sector %d with key %c. cardRr=%08x, succ=%08x",
+                                                       cardAUTHSC, cardAUTHKEY == AUTHKEYA ? 'A' : 'B',
                                                        cardRr, prng_successor(nonce, 64));
                                        // Shouldn't we respond anything here?
                                        // Right now, we don't nack or anything, which causes the
                                        // reader to do a WUPA after a while. /Martin
                                        // -- which is the correct response. /piwi
                                                        cardRr, prng_successor(nonce, 64));
                                        // Shouldn't we respond anything here?
                                        // Right now, we don't nack or anything, which causes the
                                        // reader to do a WUPA after a while. /Martin
                                        // -- which is the correct response. /piwi
-                                       cardAUTHKEY = 0xff;     // not authenticated
-                                       cardSTATE_TO_IDLE();
+                                       cardAUTHKEY = AUTHKEYNONE;  // not authenticated
+                                       cardSTATE = MFEMUL_IDLE;
                                        break;
                                }
                                        break;
                                }
-                               ans = prng_successor(nonce, 96) ^ crypto1_word(pcs, 0, 0);
-                               num_to_bytes(ans, 4, rAUTH_AT);
-                               EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
-                               if (MF_DBGLEVEL >= 4)   Dbprintf("AUTH COMPLETED for sector %d with key %c.", cardAUTHSC, cardAUTHKEY == 0 ? 'A' : 'B');
-                               LED_C_ON();
+                               ans = prng_successor(nonce, 96);
+                               num_to_bytes(ans, 4, response);
+                               mf_crypto1_encrypt(pcs, response, 4, response_par);
+                               EmSendCmdPar(response, 4, response_par);
+                               FpgaDisableTracing();
+                               if (MF_DBGLEVEL >= MF_DBG_EXTENDED)   Dbprintf("AUTH COMPLETED for sector %d with key %c.", cardAUTHSC, cardAUTHKEY == AUTHKEYA ? 'A' : 'B');
                                cardSTATE = MFEMUL_WORK;
                                break;
                        }
                                cardSTATE = MFEMUL_WORK;
                                break;
                        }
+
                        case MFEMUL_WRITEBL2:{
                                if (receivedCmd_len == 18) {
                                        mf_crypto1_decryptEx(pcs, receivedCmd, receivedCmd_len, receivedCmd_dec);
                                        if (HasValidCRC(receivedCmd_dec, receivedCmd_len)) {
                        case MFEMUL_WRITEBL2:{
                                if (receivedCmd_len == 18) {
                                        mf_crypto1_decryptEx(pcs, receivedCmd, receivedCmd_len, receivedCmd_dec);
                                        if (HasValidCRC(receivedCmd_dec, receivedCmd_len)) {
+                                               if (IsSectorTrailer(cardWRBL)) {
+                                                       emlGetMem(response, cardWRBL, 1);
+                                                       if (!IsAccessAllowed(cardWRBL, cardAUTHKEY, AC_KEYA_WRITE)) {
+                                                               memcpy(receivedCmd_dec, response, 6);   // don't change KeyA
+                                                       }
+                                                       if (!IsAccessAllowed(cardWRBL, cardAUTHKEY, AC_KEYB_WRITE)) {
+                                                               memcpy(receivedCmd_dec+10, response+10, 6); // don't change KeyA
+                                                       }
+                                                       if (!IsAccessAllowed(cardWRBL, cardAUTHKEY, AC_AC_WRITE)) {
+                                                               memcpy(receivedCmd_dec+6, response+6, 4);   // don't change AC bits
+                                                       }
+                                               } else {
+                                                       if (!IsAccessAllowed(cardWRBL, cardAUTHKEY, AC_DATA_WRITE)) {
+                                                               memcpy(receivedCmd_dec, response, 16);  // don't change anything
+                                                       }
+                                               }
                                                emlSetMem(receivedCmd_dec, cardWRBL, 1);
                                                emlSetMem(receivedCmd_dec, cardWRBL, 1);
-                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
+                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));  // always ACK?
                                                cardSTATE = MFEMUL_WORK;
                                                break;
                                        }
                                }
                                                cardSTATE = MFEMUL_WORK;
                                                break;
                                        }
                                }
-                               cardSTATE_TO_IDLE();
+                               cardSTATE = MFEMUL_IDLE;
                                break;
                        }
                                break;
                        }
+
                        case MFEMUL_INTREG_INC:{
                                if (receivedCmd_len == 6) {
                                        mf_crypto1_decryptEx(pcs, receivedCmd, receivedCmd_len, (uint8_t*)&ans);
                                        if (emlGetValBl(&cardINTREG, &cardINTBLOCK, cardWRBL)) {
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
                        case MFEMUL_INTREG_INC:{
                                if (receivedCmd_len == 6) {
                                        mf_crypto1_decryptEx(pcs, receivedCmd, receivedCmd_len, (uint8_t*)&ans);
                                        if (emlGetValBl(&cardINTREG, &cardINTBLOCK, cardWRBL)) {
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                               cardSTATE_TO_IDLE();
+                                               cardSTATE = MFEMUL_IDLE;
                                                break;
                                        }
                                        cardINTREG = cardINTREG + ans;
                                                break;
                                        }
                                        cardINTREG = cardINTREG + ans;
+                                       cardSTATE = MFEMUL_WORK;
                                }
                                }
-                               cardSTATE = MFEMUL_WORK;
                                break;
                        }
                                break;
                        }
+
                        case MFEMUL_INTREG_DEC:{
                                if (receivedCmd_len == 6) {
                                        mf_crypto1_decryptEx(pcs, receivedCmd, receivedCmd_len, (uint8_t*)&ans);
                                        if (emlGetValBl(&cardINTREG, &cardINTBLOCK, cardWRBL)) {
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
                        case MFEMUL_INTREG_DEC:{
                                if (receivedCmd_len == 6) {
                                        mf_crypto1_decryptEx(pcs, receivedCmd, receivedCmd_len, (uint8_t*)&ans);
                                        if (emlGetValBl(&cardINTREG, &cardINTBLOCK, cardWRBL)) {
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                               cardSTATE_TO_IDLE();
+                                               cardSTATE = MFEMUL_IDLE;
                                                break;
                                        }
                                                break;
                                        }
+                                       cardINTREG = cardINTREG - ans;
+                                       cardSTATE = MFEMUL_WORK;
                                }
                                }
-                               cardINTREG = cardINTREG - ans;
-                               cardSTATE = MFEMUL_WORK;
                                break;
                        }
                                break;
                        }
+
                        case MFEMUL_INTREG_REST:{
                                mf_crypto1_decryptEx(pcs, receivedCmd, receivedCmd_len, (uint8_t*)&ans);
                                if (emlGetValBl(&cardINTREG, &cardINTBLOCK, cardWRBL)) {
                                        EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
                        case MFEMUL_INTREG_REST:{
                                mf_crypto1_decryptEx(pcs, receivedCmd, receivedCmd_len, (uint8_t*)&ans);
                                if (emlGetValBl(&cardINTREG, &cardINTBLOCK, cardWRBL)) {
                                        EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                       cardSTATE_TO_IDLE();
+                                       cardSTATE = MFEMUL_IDLE;
                                        break;
                                }
                                cardSTATE = MFEMUL_WORK;
                                break;
                        }
                                        break;
                                }
                                cardSTATE = MFEMUL_WORK;
                                break;
                        }
-               }
+
+               } // end of switch
+
+               FpgaDisableTracing();
                button_pushed = BUTTON_PRESS();
                button_pushed = BUTTON_PRESS();
-       }
+
+       } // end of while
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        LEDsoff();
 
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        LEDsoff();
 
-       if(flags & FLAG_NR_AR_ATTACK && MF_DBGLEVEL >= 1) {
-               for ( uint8_t   i = 0; i < ATTACK_KEY_COUNT; i++) {
+       if(flags & FLAG_NR_AR_ATTACK && MF_DBGLEVEL >= MF_DBG_INFO) {
+               for ( uint8_t   i = 0; i < ATTACK_KEY_COUNT; i++) {
                        if (ar_nr_collected[i] == 2) {
                                Dbprintf("Collected two pairs of AR/NR which can be used to extract %s from reader for sector %d:", (i<ATTACK_KEY_COUNT/2) ? "keyA" : "keyB", ar_nr_resp[i].sector);
                                Dbprintf("../tools/mfkey/mfkey32 %08x %08x %08x %08x %08x %08x",
                        if (ar_nr_collected[i] == 2) {
                                Dbprintf("Collected two pairs of AR/NR which can be used to extract %s from reader for sector %d:", (i<ATTACK_KEY_COUNT/2) ? "keyA" : "keyB", ar_nr_resp[i].sector);
                                Dbprintf("../tools/mfkey/mfkey32 %08x %08x %08x %08x %08x %08x",
@@ -595,11 +839,11 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                                                ar_nr_resp[i].ar2    //AR2
                                                );
                        }
                                                ar_nr_resp[i].ar2    //AR2
                                                );
                        }
-               }       
-               for ( uint8_t   i = ATTACK_KEY_COUNT; i < ATTACK_KEY_COUNT*2; i++) {
+               }
+               for ( uint8_t   i = ATTACK_KEY_COUNT; i < ATTACK_KEY_COUNT*2; i++) {
                        if (ar_nr_collected[i] == 2) {
                                Dbprintf("Collected two pairs of AR/NR which can be used to extract %s from reader for sector %d:", (i<ATTACK_KEY_COUNT/2) ? "keyA" : "keyB", ar_nr_resp[i].sector);
                        if (ar_nr_collected[i] == 2) {
                                Dbprintf("Collected two pairs of AR/NR which can be used to extract %s from reader for sector %d:", (i<ATTACK_KEY_COUNT/2) ? "keyA" : "keyB", ar_nr_resp[i].sector);
-                               Dbprintf("../tools/mfkey/mfkey32v2 %08x %08x %08x %08x %08x %08x %08x",
+                               Dbprintf("../tools/mfkey/mfkey32 %08x %08x %08x %08x %08x %08x %08x",
                                                ar_nr_resp[i].cuid,  //UID
                                                ar_nr_resp[i].nonce, //NT
                                                ar_nr_resp[i].nr,    //NR1
                                                ar_nr_resp[i].cuid,  //UID
                                                ar_nr_resp[i].nonce, //NT
                                                ar_nr_resp[i].nr,    //NR1
@@ -611,10 +855,12 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                        }
                }
        }
                        }
                }
        }
-       if (MF_DBGLEVEL >= 1)   Dbprintf("Emulator stopped. Tracing: %d  trace length: %d ", get_tracing(), BigBuf_get_traceLen());
+       if (MF_DBGLEVEL >= MF_DBG_INFO) Dbprintf("Emulator stopped. Tracing: %d  trace length: %d ", get_tracing(), BigBuf_get_traceLen());
 
        if(flags & FLAG_INTERACTIVE) { // Interactive mode flag, means we need to send ACK
                //Send the collected ar_nr in the response
 
        if(flags & FLAG_INTERACTIVE) { // Interactive mode flag, means we need to send ACK
                //Send the collected ar_nr in the response
-               cmd_send(CMD_ACK,CMD_SIMULATE_MIFARE_CARD,button_pushed,0,&ar_nr_resp,sizeof(ar_nr_resp));
+               cmd_send(CMD_ACK, CMD_SIMULATE_MIFARE_CARD, button_pushed, 0, &ar_nr_resp, sizeof(ar_nr_resp));
        }
        }
+
+       LED_A_OFF();
 }
 }
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