]> git.zerfleddert.de Git - proxmark3-svn/blobdiff - armsrc/iso14443a.c
ADD: @marshmellow42 's 14b fixes.
[proxmark3-svn] / armsrc / iso14443a.c
index b9fb9baea308d476a961a3c9d1c77c85ce392768..027703ec40497499482021d0ae6d4441dc46baf0 100644 (file)
@@ -561,7 +561,7 @@ static RAMFUNC int ManchesterDecoding(uint8_t bit, uint16_t offset, uint32_t non
 // triggering so that we start recording at the point that the tag is moved
 // near the reader.
 //-----------------------------------------------------------------------------
-void RAMFUNC SnoopIso14443a(uint8_t param) {
+void RAMFUNC SniffIso14443a(uint8_t param) {
        // param:
        // bit 0 - trigger from first card answer
        // bit 1 - trigger from first reader 7-bit request
@@ -673,6 +673,7 @@ void RAMFUNC SnoopIso14443a(uint8_t param) {
                                        }
                                        /* And ready to receive another command. */
                                        UartReset();
+                                       //UartInit(receivedCmd, receivedCmdPar);
                                        /* And also reset the demod code, which might have been */
                                        /* false-triggered by the commands from the reader. */
                                        DemodReset();
@@ -912,7 +913,9 @@ bool prepare_tag_modulation(tag_response_info_t* response_info, size_t max_buffe
 // Coded responses need one byte per bit to transfer (data, parity, start, stop, correction) 
 // 28 * 8 data bits, 28 * 1 parity bits, 7 start bits, 7 stop bits, 7 correction bits
 // -> need 273 bytes buffer
-#define ALLOCATED_TAG_MODULATION_BUFFER_SIZE 273
+// 44 * 8 data bits, 44 * 1 parity bits, 9 start bits, 9 stop bits, 9 correction bits --370
+// 47 * 8 data bits, 47 * 1 parity bits, 10 start bits, 10 stop bits, 10 correction bits 
+#define ALLOCATED_TAG_MODULATION_BUFFER_SIZE 453 
 
 bool prepare_allocated_tag_modulation(tag_response_info_t* response_info) {
   // Retrieve and store the current buffer index
@@ -935,10 +938,20 @@ bool prepare_allocated_tag_modulation(tag_response_info_t* response_info) {
 // Main loop of simulated tag: receive commands from reader, decide what
 // response to send, and send it.
 //-----------------------------------------------------------------------------
-void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
+void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data)
 {
-       uint8_t sak;
 
+       //Here, we collect UID,NT,AR,NR,UID2,NT2,AR2,NR2
+       // This can be used in a reader-only attack.
+       // (it can also be retrieved via 'hf 14a list', but hey...
+       uint32_t ar_nr_responses[] = {0,0,0,0,0,0,0,0,0,0};
+       uint8_t ar_nr_collected = 0;
+       
+       uint8_t sak;
+                                       
+       // PACK response to PWD AUTH for EV1/NTAG
+       uint8_t response8[4];
+       
        // The first response contains the ATQA (note: bytes are transmitted in reverse order).
        uint8_t response1[2];
        
@@ -951,7 +964,7 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
                } break;
                case 2: { // MIFARE Ultralight
                        // Says: I am a stupid memory tag, no crypto
-                       response1[0] = 0x04;
+                       response1[0] = 0x44;
                        response1[1] = 0x00;
                        sak = 0x00;
                } break;
@@ -972,6 +985,22 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
                        response1[0] = 0x01;
                        response1[1] = 0x0f;
                        sak = 0x01;
+               } break;
+               case 6: { // MIFARE Mini
+                       // Says: I am a Mifare Mini, 320b
+                       response1[0] = 0x44;
+                       response1[1] = 0x00;
+                       sak = 0x09;
+               } break;
+               case 7: { // NTAG?
+                       // Says: I am a NTAG, 
+                       response1[0] = 0x44;
+                       response1[1] = 0x00;
+                       sak = 0x00;
+                       // PACK
+                       response8[0] = 0x80;
+                       response8[1] = 0x80;
+                       ComputeCrc14443(CRC_14443_A, response8, 2, &response8[2], &response8[3]);
                } break;                
                default: {
                        Dbprintf("Error: unkown tagtype (%d)",tagType);
@@ -985,17 +1014,24 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
        // Check if the uid uses the (optional) part
        uint8_t response2a[5] = {0x00};
        
-       if (uid_2nd) {
+       if (flags & FLAG_7B_UID_IN_DATA) {
                response2[0] = 0x88;
-               num_to_bytes(uid_1st,3,response2+1);
-               num_to_bytes(uid_2nd,4,response2a);
+               response2[1] = data[0];
+               response2[2] = data[1];
+               response2[3] = data[2];
+
+               response2a[0] = data[3];
+               response2a[1] = data[4];
+               response2a[2] = data[5];
+               response2a[3] = data[6]; //??
                response2a[4] = response2a[0] ^ response2a[1] ^ response2a[2] ^ response2a[3];
 
                // Configure the ATQA and SAK accordingly
                response1[0] |= 0x40;
                sak |= 0x04;
        } else {
-               num_to_bytes(uid_1st,4,response2);
+               memcpy(response2, data, 4);
+               //num_to_bytes(uid_1st,4,response2);
                // Configure the ATQA and SAK accordingly
                response1[0] &= 0xBF;
                sak &= 0xFB;
@@ -1014,7 +1050,7 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
        response3a[0] = sak & 0xFB;
        ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]);
 
-       uint8_t response5[] = { 0x00, 0x00, 0x00, 0x00 }; // Very random tag nonce
+       uint8_t response5[] = { 0x01, 0x01, 0x01, 0x01 }; // Very random tag nonce
        uint8_t response6[] = { 0x04, 0x58, 0x80, 0x02, 0x00, 0x00 }; // dummy ATS (pseudo-ATR), answer to RATS: 
        // Format byte = 0x58: FSCI=0x08 (FSC=256), TA(1) and TC(1) present, 
        // TA(1) = 0x80: different divisors not supported, DR = 1, DS = 1
@@ -1022,7 +1058,14 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
        // TC(1) = 0x02: CID supported, NAD not supported
        ComputeCrc14443(CRC_14443_A, response6, 4, &response6[4], &response6[5]);
 
-       #define TAG_RESPONSE_COUNT 7
+       // Prepare GET_VERSION (different for EV-1 / NTAG)
+       //uint8_t response7_EV1[] = {0x00, 0x04, 0x03, 0x01, 0x01, 0x00, 0x0b, 0x03, 0xfd, 0xf7};  //EV1 48bytes VERSION.
+       uint8_t response7_NTAG[] = {0x00, 0x04, 0x04, 0x02, 0x01, 0x00, 0x11, 0x03, 0x01, 0x9e}; //NTAG 215
+       
+       // Prepare CHK_TEARING
+       uint8_t response9[] =  {0xBD,0x90,0x3f};
+       
+       #define TAG_RESPONSE_COUNT 10
        tag_response_info_t responses[TAG_RESPONSE_COUNT] = {
                { .response = response1,  .response_n = sizeof(response1)  },  // Answer to request - respond with card type
                { .response = response2,  .response_n = sizeof(response2)  },  // Anticollision cascade1 - respond with uid
@@ -1031,6 +1074,9 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
                { .response = response3a, .response_n = sizeof(response3a) },  // Acknowledge select - cascade 2
                { .response = response5,  .response_n = sizeof(response5)  },  // Authentication answer (random nonce)
                { .response = response6,  .response_n = sizeof(response6)  },  // dummy ATS (pseudo-ATR), answer to RATS
+               { .response = response7_NTAG,  .response_n = sizeof(response7_NTAG)  },  // EV1/NTAG GET_VERSION response
+               { .response = response8,   .response_n = sizeof(response8) },  // EV1/NTAG PACK response
+               { .response = response9,   .response_n = sizeof(response9) }  // EV1/NTAG CHK_TEAR response
        };
 
        // Allocate 512 bytes for the dynamic modulation, created when the reader queries for it
@@ -1106,10 +1152,74 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
                } else if(receivedCmd[1] == 0x70 && receivedCmd[0] == 0x95) {   // Received a SELECT (cascade 2)
                        p_response = &responses[4]; order = 30;
                } else if(receivedCmd[0] == 0x30) {     // Received a (plain) READ
-                       EmSendCmdEx(data+(4*receivedCmd[1]),16,false);
-                       // Dbprintf("Read request from reader: %x %x",receivedCmd[0],receivedCmd[1]);
-                       // We already responded, do not send anything with the EmSendCmd14443aRaw() that is called below
+                       uint8_t block = receivedCmd[1];
+                       if ( tagType == 7 ) {
+                               uint8_t start = 4 * block;
+                               
+                               if ( block < 4 ) {
+                                   //NTAG 215
+                                       uint8_t blockdata[50] = {
+                                       data[0],data[1],data[2], 0x88 ^ data[0] ^ data[1] ^ data[2],
+                                       data[3],data[4],data[5],data[6],
+                                       data[3] ^ data[4] ^ data[5] ^ data[6],0x48,0x0f,0xe0,
+                                       0xe1,0x10,0x12,0x00,
+                                       0x03,0x00,0xfe,0x00, 
+                                       0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+                                       0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+                                       0x00,0x00,0x00,0x00,
+                                       0x00,0x00};
+                                       AppendCrc14443a(blockdata+start, 16);
+                                       EmSendCmdEx( blockdata+start, MAX_MIFARE_FRAME_SIZE, false);
+                               } else {        
+                                       uint8_t emdata[MAX_MIFARE_FRAME_SIZE];
+                                       emlGetMemBt( emdata, start, 16);
+                                       AppendCrc14443a(emdata, 16);
+                                       EmSendCmdEx(emdata, sizeof(emdata), false);                             
+                               }
+                               p_response = NULL;
+                               
+                       } else {                        
+                               EmSendCmdEx(data+(4*block),16,false);
+                               // Dbprintf("Read request from reader: %x %x",receivedCmd[0],receivedCmd[1]);
+                               // We already responded, do not send anything with the EmSendCmd14443aRaw() that is called below
+                               p_response = NULL;
+                       }
+               } else if(receivedCmd[0] == 0x3A) {     // Received a FAST READ (ranged read) -- just returns all zeros.
+                               
+                               uint8_t emdata[MAX_FRAME_SIZE];
+                               int start =  receivedCmd[1] * 4;
+                               int len   = (receivedCmd[2] - receivedCmd[1] + 1) * 4;
+                               emlGetMemBt( emdata, start, len);
+                               AppendCrc14443a(emdata, len);
+                               EmSendCmdEx(emdata, len+2, false);                              
+                               p_response = NULL;
+                               
+               } else if(receivedCmd[0] == 0x3C && tagType == 7) {     // Received a READ SIGNATURE -- 
+                               // ECC data,  taken from a NTAG215 amiibo token. might work. LEN: 32, + 2 crc
+                               uint8_t data[] = {0x56,0x06,0xa6,0x4f,0x43,0x32,0x53,0x6f,
+                                                                 0x43,0xda,0x45,0xd6,0x61,0x38,0xaa,0x1e,
+                                                                 0xcf,0xd3,0x61,0x36,0xca,0x5f,0xbb,0x05,
+                                                                 0xce,0x21,0x24,0x5b,0xa6,0x7a,0x79,0x07,
+                                                                 0x00,0x00};
+                               AppendCrc14443a(data, sizeof(data)-2);
+                               EmSendCmdEx(data,sizeof(data),false);
+                               p_response = NULL;                                      
+               } else if(receivedCmd[0] == 0x39 && tagType == 7) {     // Received a READ COUNTER -- 
+                               uint8_t data[] =  {0x00,0x00,0x00,0x14,0xa5};
+                               EmSendCmdEx(data,sizeof(data),false);                           
+                               p_response = NULL;
+               } else if(receivedCmd[0] == 0xA5 && tagType == 7) {     // Received a INC COUNTER -- 
+                       // number of counter
+                       //uint8_t counter = receivedCmd[1];
+                       //uint32_t val = bytes_to_num(receivedCmd+2,4);
+                       
+                       // send ACK
+                       uint8_t ack[] = {0x0a};
+                       EmSendCmdEx(ack,sizeof(ack),false);
                        p_response = NULL;
+                       
+               } else if(receivedCmd[0] == 0x3E && tagType == 7) {     // Received a CHECK_TEARING_EVENT -- 
+                               p_response = &responses[9];                             
                } else if(receivedCmd[0] == 0x50) {     // Received a HALT
 
                        if (tracing) {
@@ -1117,7 +1227,12 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
                        }
                        p_response = NULL;
                } else if(receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61) {   // Received an authentication request
-                       p_response = &responses[5]; order = 7;
+                                       
+                       if ( tagType == 7 ) {   // IF NTAG /EV1  0x60 == GET_VERSION, not a authentication request.
+                               p_response = &responses[7];
+                       } else {
+                               p_response = &responses[5]; order = 7;
+                       }
                } else if(receivedCmd[0] == 0xE0) {     // Received a RATS request
                        if (tagType == 1 || tagType == 2) {     // RATS not supported
                                EmSend4bit(CARD_NACK_NA);
@@ -1129,10 +1244,58 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
                        if (tracing) {
                                LogTrace(receivedCmd, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
                        }
+                       uint32_t nonce = bytes_to_num(response5,4);
                        uint32_t nr = bytes_to_num(receivedCmd,4);
                        uint32_t ar = bytes_to_num(receivedCmd+4,4);
-                       Dbprintf("Auth attempt {nr}{ar}: %08x %08x",nr,ar);
-               } else {
+                       //Dbprintf("Auth attempt {nonce}{nr}{ar}: %08x %08x %08x", nonce, nr, ar);
+
+                       if(flags & FLAG_NR_AR_ATTACK )
+                       {
+                               if(ar_nr_collected < 2){
+                                       // Avoid duplicates... probably not necessary, nr should vary. 
+                                       //if(ar_nr_responses[3] != nr){                                         
+                                               ar_nr_responses[ar_nr_collected*5]   = 0;
+                                               ar_nr_responses[ar_nr_collected*5+1] = 0;
+                                               ar_nr_responses[ar_nr_collected*5+2] = nonce;
+                                               ar_nr_responses[ar_nr_collected*5+3] = nr;
+                                               ar_nr_responses[ar_nr_collected*5+4] = ar;
+                                               ar_nr_collected++;
+                                       //}
+                               }                       
+
+                               if(ar_nr_collected > 1 ) {
+                               
+                                       if (MF_DBGLEVEL >= 2) {
+                                                       Dbprintf("Collected two pairs of AR/NR which can be used to extract keys from reader:");
+                                                       Dbprintf("../tools/mfkey/mfkey32 %07x%08x %08x %08x %08x %08x %08x",
+                                                               ar_nr_responses[0], // UID1
+                                                               ar_nr_responses[1], // UID2
+                                                               ar_nr_responses[2], // NT
+                                                               ar_nr_responses[3], // AR1
+                                                               ar_nr_responses[4], // NR1
+                                                               ar_nr_responses[8], // AR2
+                                                               ar_nr_responses[9]  // NR2
+                                                       );
+                                       }
+                                       uint8_t len = ar_nr_collected*5*4;
+                                       cmd_send(CMD_ACK,CMD_SIMULATE_MIFARE_CARD,len,0,&ar_nr_responses,len);
+                                       ar_nr_collected = 0;
+                                       memset(ar_nr_responses, 0x00, len);
+                               }
+                       }
+               } else if (receivedCmd[0] == 0x1a ) // ULC authentication
+               {
+                       
+               }
+               else if (receivedCmd[0] == 0x1b) // NTAG / EV-1 authentication
+               {
+                       if ( tagType == 7 ) {
+                               p_response =  &responses[8]; // PACK response
+                               uint32_t pwd = bytes_to_num(receivedCmd+1,4);
+                               Dbprintf("Auth attempt: %08x", pwd);    
+                       }
+               }
+               else {
                        // Check for ISO 14443A-4 compliant commands, look at left nibble
                        switch (receivedCmd[0]) {
 
@@ -1235,9 +1398,13 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
                }
        }
 
-       Dbprintf("%x %x %x", happened, happened2, cmdsRecvd);
-       LED_A_OFF();
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        BigBuf_free_keep_EM();
+       LED_A_OFF();
+       
+       Dbprintf("-[ Wake ups after halt [%d]", happened);
+       Dbprintf("-[ Messages after halt [%d]", happened2);
+       Dbprintf("-[ Num of received cmd [%d]", cmdsRecvd);
 }
 
 
@@ -1518,9 +1685,7 @@ static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNe
                        FpgaSendQueueDelay = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
                }
        
-               if(BUTTON_PRESS()) {
-                       break;
-               }
+               if(BUTTON_PRESS()) break;
        }
 
        // Ensure that the FPGA Delay Queue is empty before we switch to TAGSIM_LISTEN again:
@@ -1958,7 +2123,7 @@ void ReaderIso14443a(UsbCommand *c)
                        if(param & ISO14A_TOPAZMODE) {
                                AppendCrc14443b(cmd,len);
                        } else {
-                       AppendCrc14443a(cmd,len);
+                               AppendCrc14443a(cmd,len);
                        }
                        len += 2;
                        if (lenbits) lenbits += 16;
@@ -2010,13 +2175,11 @@ void ReaderIso14443a(UsbCommand *c)
 // Therefore try in alternating directions.
 int32_t dist_nt(uint32_t nt1, uint32_t nt2) {
 
-       uint16_t i;
-       uint32_t nttmp1, nttmp2;
-
        if (nt1 == nt2) return 0;
 
-       nttmp1 = nt1;
-       nttmp2 = nt2;
+       uint16_t i;
+       uint32_t nttmp1 = nt1;
+       uint32_t nttmp2 = nt2;
        
        for (i = 1; i < 32768; i++) {
                nttmp1 = prng_successor(nttmp1, 1);
@@ -2035,28 +2198,27 @@ int32_t dist_nt(uint32_t nt1, uint32_t nt2) {
 // Cloning MiFare Classic Rail and Building Passes, Anywhere, Anytime"
 // (article by Nicolas T. Courtois, 2009)
 //-----------------------------------------------------------------------------
-void ReaderMifare(bool first_try)
-{
-       // Mifare AUTH
-       uint8_t mf_auth[]    = { 0x60,0x00,0xf5,0x7b };
-       uint8_t mf_nr_ar[]   = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
-       static uint8_t mf_nr_ar3;
-
-       uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
-       uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
-
+void ReaderMifare(bool first_try) {
        // free eventually allocated BigBuf memory. We want all for tracing.
        BigBuf_free();
        
        clear_trace();
        set_tracing(TRUE);
 
+       // Mifare AUTH
+       uint8_t mf_auth[] = { 0x60,0x00,0xf5,0x7b };
+       uint8_t mf_nr_ar[8] = { 0x00 }; //{ 0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01 };
+       static uint8_t mf_nr_ar3 = 0;
+
+       uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE] = { 0x00 };
+       uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE] = { 0x00 };
+
        byte_t nt_diff = 0;
        uint8_t par[1] = {0};   // maximum 8 Bytes to be sent here, 1 byte parity is therefore enough
        static byte_t par_low = 0;
        bool led_on = TRUE;
-       uint8_t uid[10]  ={0};
-       uint32_t cuid;
+       uint8_t uid[10] = {0x00};
+       //uint32_t cuid = 0x00;
 
        uint32_t nt = 0;
        uint32_t previous_nt = 0;
@@ -2064,13 +2226,15 @@ void ReaderMifare(bool first_try)
        byte_t par_list[8] = {0x00};
        byte_t ks_list[8] = {0x00};
 
-       static uint32_t sync_time;
-       static uint32_t sync_cycles;
+       static uint32_t sync_time = 0;
+       static uint32_t sync_cycles = 0;
        int catch_up_cycles = 0;
        int last_catch_up = 0;
        uint16_t consecutive_resyncs = 0;
        int isOK = 0;
 
+       int numWrongDistance = 0;
+       
        if (first_try) { 
                mf_nr_ar3 = 0;
                iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
@@ -2090,20 +2254,22 @@ void ReaderMifare(bool first_try)
        LED_A_ON();
        LED_B_OFF();
        LED_C_OFF();
-       
+       LED_C_ON();     
   
        for(uint16_t i = 0; TRUE; i++) {
                
                WDT_HIT();
 
                // Test if the action was cancelled
-               if(BUTTON_PRESS()) {
+               if(BUTTON_PRESS()) break;
+               
+               if (numWrongDistance > 1000) {
+                       isOK = 0;
                        break;
                }
                
-               LED_C_ON();
-
-               if(!iso14443a_select_card(uid, NULL, &cuid)) {
+               //if(!iso14443a_select_card(uid, NULL, &cuid)) {
+               if(!iso14443a_select_card(uid, NULL, NULL)) {
                        if (MF_DBGLEVEL >= 1)   Dbprintf("Mifare: Can't select card");
                        continue;
                }
@@ -2137,9 +2303,14 @@ void ReaderMifare(bool first_try)
                                nt_attacked = nt;
                        }
                        else {
-                               if (nt_distance == -99999) { // invalid nonce received, try again
+                               
+                               // invalid nonce received, try again
+                               if (nt_distance == -99999) { 
+                                       numWrongDistance++;
+                                       if (MF_DBGLEVEL >= 3) Dbprintf("The two nonces has invalid distance, tag could have good PRNG\n");
                                        continue;
                                }
+                               
                                sync_cycles = (sync_cycles - nt_distance);
                                if (MF_DBGLEVEL >= 3) Dbprintf("calibrating in cycle %d. nt_distance=%d, Sync_cycles: %d\n", i, nt_distance, sync_cycles);
                                continue;
@@ -2148,7 +2319,7 @@ void ReaderMifare(bool first_try)
 
                if ((nt != nt_attacked) && nt_attacked) {       // we somehow lost sync. Try to catch up again...
                        catch_up_cycles = -dist_nt(nt_attacked, nt);
-                       if (catch_up_cycles == 99999) {                 // invalid nonce received. Don't resync on that one.
+                       if (catch_up_cycles >= 99999) {                 // invalid nonce received. Don't resync on that one.
                                catch_up_cycles = 0;
                                continue;
                        }
@@ -2206,10 +2377,10 @@ void ReaderMifare(bool first_try)
                }
        }
 
-
        mf_nr_ar[3] &= 0x1F;
        
-       byte_t buf[28];
+       byte_t buf[28] = {0x00};
+       
        memcpy(buf + 0,  uid, 4);
        num_to_bytes(nt, 4, buf + 4);
        memcpy(buf + 8,  par_list, 8);
@@ -2218,14 +2389,13 @@ void ReaderMifare(bool first_try)
                
        cmd_send(CMD_ACK,isOK,0,0,buf,28);
 
-       // Thats it...
+       set_tracing(FALSE);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        LEDsoff();
-
-       set_tracing(FALSE);
 }
 
-/**
+
+ /*
   *MIFARE 1K simulate.
   *
   *@param flags :
@@ -2247,7 +2417,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
        uint8_t cardWRBL = 0;
        uint8_t cardAUTHSC = 0;
        uint8_t cardAUTHKEY = 0xff;  // no authentication
-       uint32_t cardRr = 0;
+//     uint32_t cardRr = 0;
        uint32_t cuid = 0;
        //uint32_t rn_enc = 0;
        uint32_t ans = 0;
@@ -2265,16 +2435,17 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
        uint8_t rATQA[] = {0x04, 0x00}; // Mifare classic 1k 4BUID
        uint8_t rUIDBCC1[] = {0xde, 0xad, 0xbe, 0xaf, 0x62};
        uint8_t rUIDBCC2[] = {0xde, 0xad, 0xbe, 0xaf, 0x62}; // !!!
-       uint8_t rSAK[] = {0x08, 0xb6, 0xdd};
+       //uint8_t rSAK[] = {0x08, 0xb6, 0xdd}; // Mifare Classic
+       uint8_t rSAK[] = {0x09, 0x3f, 0xcc };  // Mifare Mini 
        uint8_t rSAK1[] = {0x04, 0xda, 0x17};
 
-       uint8_t rAUTH_NT[] = {0x01, 0x02, 0x03, 0x04};
+       uint8_t rAUTH_NT[] = {0x01, 0x01, 0x01, 0x01};
        uint8_t rAUTH_AT[] = {0x00, 0x00, 0x00, 0x00};
                
        //Here, we collect UID,NT,AR,NR,UID2,NT2,AR2,NR2
        // This can be used in a reader-only attack.
        // (it can also be retrieved via 'hf 14a list', but hey...
-       uint32_t ar_nr_responses[] = {0,0,0,0,0,0,0,0};
+       uint32_t ar_nr_responses[] = {0,0,0,0,0,0,0,0,0,0};
        uint8_t ar_nr_collected = 0;
 
        // free eventually allocated BigBuf memory but keep Emulator Memory
@@ -2313,6 +2484,11 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                }
        }
 
+       // save uid.
+       ar_nr_responses[0*5]   = bytes_to_num(rUIDBCC1+1, 3);
+       if ( _7BUID )
+               ar_nr_responses[0*5+1] = bytes_to_num(rUIDBCC2, 4);
+
        /*
         * Regardless of what method was used to set the UID, set fifth byte and modify
         * the ATQA for 4 or 7-byte UID
@@ -2321,6 +2497,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
        if (_7BUID) {
                rATQA[0] = 0x44;
                rUIDBCC1[0] = 0x88;
+               rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
                rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3];
        }
 
@@ -2354,7 +2531,6 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                if(cardSTATE == MFEMUL_NOFIELD) continue;
 
                //Now, get data
-
                res = EmGetCmd(receivedCmd, &len, receivedCmd_par);
                if (res == 2) { //Field is off!
                        cardSTATE = MFEMUL_NOFIELD;
@@ -2425,13 +2601,15 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                                uint32_t nr = bytes_to_num(&receivedCmd[4], 4);
 
                                //Collect AR/NR
-                               if(ar_nr_collected < 2 && cardAUTHSC == 2){
+                               //if(ar_nr_collected < 2 && cardAUTHSC == 2){
+                               if(ar_nr_collected < 2){
                                        if(ar_nr_responses[2] != ar)
                                        {// Avoid duplicates... probably not necessary, ar should vary. 
-                                               ar_nr_responses[ar_nr_collected*4] = cuid;
-                                               ar_nr_responses[ar_nr_collected*4+1] = nonce;
-                                               ar_nr_responses[ar_nr_collected*4+2] = ar;
-                                               ar_nr_responses[ar_nr_collected*4+3] = nr;
+                                               //ar_nr_responses[ar_nr_collected*5]   = 0;
+                                               //ar_nr_responses[ar_nr_collected*5+1] = 0;
+                                               ar_nr_responses[ar_nr_collected*5+2] = nonce;
+                                               ar_nr_responses[ar_nr_collected*5+3] = nr;
+                                               ar_nr_responses[ar_nr_collected*5+4] = ar;
                                                ar_nr_collected++;
                                        }                                               
                                        // Interactive mode flag, means we need to send ACK
@@ -2442,22 +2620,23 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                                }
 
                                // --- crypto
-                               crypto1_word(pcs, ar , 1);
-                               cardRr = nr ^ crypto1_word(pcs, 0, 0);
-
-                               // 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',
-                                                       cardRr, prng_successor(nonce, 64));
+                               //crypto1_word(pcs, ar , 1);
+                               //cardRr = nr ^ crypto1_word(pcs, 0, 0);
+
+                               //test if auth OK
+                               //if (cardRr != prng_successor(nonce, 64)){
+                                       
+                                       //if (MF_DBGLEVEL >= 4) Dbprintf("AUTH FAILED for sector %d with key %c. cardRr=%08x, succ=%08x",
+                                       //      cardAUTHSC, cardAUTHKEY == 0 ? '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
-                                       cardSTATE_TO_IDLE();
-                                       LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
-                                       break;
-                               }
+                                       //cardSTATE_TO_IDLE();
+                                       //LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
+                                       //break;
+                               //}
 
                                ans = prng_successor(nonce, 96) ^ crypto1_word(pcs, 0, 0);
 
@@ -2565,13 +2744,13 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                                                || receivedCmd[0] == 0xB0) { // transfer
                                        if (receivedCmd[1] >= 16 * 4) {
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                               if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate (0x%02) on out of range block: %d (0x%02x), nacking",receivedCmd[0],receivedCmd[1],receivedCmd[1]);
+                                               if (MF_DBGLEVEL >= 4) Dbprintf("Reader tried to operate (0x%02) on out of range block: %d (0x%02x), nacking",receivedCmd[0],receivedCmd[1],receivedCmd[1]);
                                                break;
                                        }
 
                                        if (receivedCmd[1] / 4 != cardAUTHSC) {
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                               if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate (0x%02) on block (0x%02x) not authenticated for (0x%02x), nacking",receivedCmd[0],receivedCmd[1],cardAUTHSC);
+                                               if (MF_DBGLEVEL >= 4) Dbprintf("Reader tried to operate (0x%02) on block (0x%02x) not authenticated for (0x%02x), nacking",receivedCmd[0],receivedCmd[1],cardAUTHSC);
                                                break;
                                        }
                                }
@@ -2603,7 +2782,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                                if (receivedCmd[0] == 0xC0 || receivedCmd[0] == 0xC1 || receivedCmd[0] == 0xC2) {
                                        if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0x%02x inc(0xC1)/dec(0xC0)/restore(0xC2) block %d (%02x)",receivedCmd[0],receivedCmd[1],receivedCmd[1]);
                                        if (emlCheckValBl(receivedCmd[1])) {
-                                               if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate on block, but emlCheckValBl failed, nacking");
+                                               if (MF_DBGLEVEL >= 4) Dbprintf("Reader tried to operate on block, but emlCheckValBl failed, nacking");
                                                EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
                                                break;
                                        }
@@ -2705,39 +2884,40 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
        if(flags & FLAG_INTERACTIVE)// Interactive mode flag, means we need to send ACK
        {
                //May just aswell send the collected ar_nr in the response aswell
-               cmd_send(CMD_ACK,CMD_SIMULATE_MIFARE_CARD,1,0,&ar_nr_responses,ar_nr_collected*4*4);
+               uint8_t len = ar_nr_collected*5*4;
+               cmd_send(CMD_ACK, CMD_SIMULATE_MIFARE_CARD, len, 0, &ar_nr_responses, len);
        }
 
        if(flags & FLAG_NR_AR_ATTACK && MF_DBGLEVEL >= 1 )
        {
                if(ar_nr_collected > 1 ) {
                        Dbprintf("Collected two pairs of AR/NR which can be used to extract keys from reader:");
-                       Dbprintf("../tools/mfkey/mfkey32 %08x %08x %08x %08x %08x %08x",
-                                       ar_nr_responses[0], // UID
-                                       ar_nr_responses[1], //NT
-                                       ar_nr_responses[2], //AR1
-                                       ar_nr_responses[3], //NR1
-                                       ar_nr_responses[6], //AR2
-                                       ar_nr_responses[7] //NR2
+                       Dbprintf("../tools/mfkey/mfkey32 %06x%08x %08x %08x %08x %08x %08x",
+                                       ar_nr_responses[0], // UID1
+                                       ar_nr_responses[1], // UID2
+                                       ar_nr_responses[2], // NT
+                                       ar_nr_responses[3], // AR1
+                                       ar_nr_responses[4], // NR1
+                                       ar_nr_responses[8], // AR2
+                                       ar_nr_responses[9]  // NR2
                                        );
                } else {
                        Dbprintf("Failed to obtain two AR/NR pairs!");
                        if(ar_nr_collected > 0 ) {
-                               Dbprintf("Only got these: UID=%08x, nonce=%08x, AR1=%08x, NR1=%08x",
-                                               ar_nr_responses[0], // UID
-                                               ar_nr_responses[1], //NT
-                                               ar_nr_responses[2], //AR1
-                                               ar_nr_responses[3] //NR1
+                               Dbprintf("Only got these: UID=%07x%08x, nonce=%08x, AR1=%08x, NR1=%08x",
+                                               ar_nr_responses[0], // UID1
+                                               ar_nr_responses[1], // UID2
+                                               ar_nr_responses[2], // NT
+                                               ar_nr_responses[3], // AR1
+                                               ar_nr_responses[4]  // NR1
                                                );
                        }
                }
        }
-       if (MF_DBGLEVEL >= 1)   Dbprintf("Emulator stopped. Tracing: %d  trace length: %d ",    tracing, BigBuf_get_traceLen());
-       
+       if (MF_DBGLEVEL >= 1)   Dbprintf("Emulator stopped. Tracing: %d  trace length: %d ", tracing, BigBuf_get_traceLen());
 }
 
 
-
 //-----------------------------------------------------------------------------
 // MIFARE sniffer. 
 // 
@@ -2747,6 +2927,9 @@ void RAMFUNC SniffMifare(uint8_t param) {
        // bit 0 - trigger from first card answer
        // bit 1 - trigger from first reader 7-bit request
 
+       // free eventually allocated BigBuf memory
+       BigBuf_free();
+       
        // C(red) A(yellow) B(green)
        LEDsoff();
        // init trace buffer
@@ -2762,12 +2945,6 @@ void RAMFUNC SniffMifare(uint8_t param) {
        uint8_t receivedResponse[MAX_MIFARE_FRAME_SIZE];
        uint8_t receivedResponsePar[MAX_MIFARE_PARITY_SIZE];
 
-       // As we receive stuff, we copy it from receivedCmd or receivedResponse
-       // into trace, along with its length and other annotations.
-       //uint8_t *trace = (uint8_t *)BigBuf;
-       
-       // free eventually allocated BigBuf memory
-       BigBuf_free();
        // allocate the DMA buffer, used to stream samples from the FPGA
        uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE);
        uint8_t *data = dmaBuf;
@@ -2858,7 +3035,8 @@ void RAMFUNC SniffMifare(uint8_t param) {
                                        if (MfSniffLogic(receivedCmd, Uart.len, Uart.parity, Uart.bitCount, TRUE)) break;
 
                                        /* And ready to receive another command. */
-                                       UartInit(receivedCmd, receivedCmdPar);
+                                       //UartInit(receivedCmd, receivedCmdPar);
+                                       UartReset();
                                        
                                        /* And also reset the demod code */
                                        DemodReset();
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