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ADD: lf indalademod output, The binary string is now printed with linebreaks every...
[proxmark3-svn] / armsrc / iso14443a.c
diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c
index e1ec477c454ebb1f9f92f5aeb301edf454940d0b..ad2bf6589ee4989760f00c73ecacbe61a95271e3 100644 (file)
--- a/armsrc/iso14443a.c
+++ b/armsrc/iso14443a.c
@@ -565,19 +565,18 @@ void RAMFUNC SniffIso14443a(uint8_t param) {
        // param:
        // bit 0 - trigger from first card answer
        // bit 1 - trigger from first reader 7-bit request
        // param:
        // bit 0 - trigger from first card answer
        // bit 1 - trigger from first reader 7-bit request
-       
        LEDsoff();
 
        LEDsoff();
 
-       // We won't start recording the frames that we acquire until we trigger;
-       // a good trigger condition to get started is probably when we see a
-       // response from the tag.
-       // triggered == FALSE -- to wait first for card
-       bool triggered = !(param & 0x03); 
+       iso14443a_setup(FPGA_HF_ISO14443A_SNIFFER);
        
        // Allocate memory from BigBuf for some buffers
        // free all previous allocations first
        BigBuf_free();
        
        // Allocate memory from BigBuf for some buffers
        // free all previous allocations first
        BigBuf_free();
-
+       
+       // init trace buffer
+       clear_trace();
+       set_tracing(TRUE);
+       
        // The command (reader -> tag) that we're receiving.
        uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE);
        uint8_t *receivedCmdPar = BigBuf_malloc(MAX_PARITY_SIZE);
        // The command (reader -> tag) that we're receiving.
        uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE);
        uint8_t *receivedCmdPar = BigBuf_malloc(MAX_PARITY_SIZE);
@@ -589,10 +588,6 @@ void RAMFUNC SniffIso14443a(uint8_t param) {
        // The DMA buffer, used to stream samples from the FPGA
        uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE);
 
        // The DMA buffer, used to stream samples from the FPGA
        uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE);
 
-       // init trace buffer
-       clear_trace();
-       set_tracing(TRUE);
-
        uint8_t *data = dmaBuf;
        uint8_t previous_data = 0;
        int maxDataLen = 0;
        uint8_t *data = dmaBuf;
        uint8_t previous_data = 0;
        int maxDataLen = 0;
@@ -600,8 +595,6 @@ void RAMFUNC SniffIso14443a(uint8_t param) {
        bool TagIsActive = FALSE;
        bool ReaderIsActive = FALSE;
        
        bool TagIsActive = FALSE;
        bool ReaderIsActive = FALSE;
        
-       iso14443a_setup(FPGA_HF_ISO14443A_SNIFFER);
-
        // Set up the demodulator for tag -> reader responses.
        DemodInit(receivedResponse, receivedResponsePar);
        
        // Set up the demodulator for tag -> reader responses.
        DemodInit(receivedResponse, receivedResponsePar);
        
@@ -611,6 +604,12 @@ void RAMFUNC SniffIso14443a(uint8_t param) {
        // Setup and start DMA.
        FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE);
        
        // Setup and start DMA.
        FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE);
        
+       // We won't start recording the frames that we acquire until we trigger;
+       // a good trigger condition to get started is probably when we see a
+       // response from the tag.
+       // triggered == FALSE -- to wait first for card
+       bool triggered = !(param & 0x03); 
+       
        // And now we loop, receiving samples.
        for(uint32_t rsamples = 0; TRUE; ) {
 
        // And now we loop, receiving samples.
        for(uint32_t rsamples = 0; TRUE; ) {
 
@@ -673,7 +672,6 @@ void RAMFUNC SniffIso14443a(uint8_t param) {
                                        }
                                        /* And ready to receive another command. */
                                        UartReset();
                                        }
                                        /* 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();
                                        /* And also reset the demod code, which might have been */
                                        /* false-triggered by the commands from the reader. */
                                        DemodReset();
@@ -715,12 +713,13 @@ void RAMFUNC SniffIso14443a(uint8_t param) {
                }
        } // main cycle
 
                }
        } // main cycle
 
-       DbpString("COMMAND FINISHED");
-
        FpgaDisableSscDma();
        FpgaDisableSscDma();
+       LEDsoff();
+
        Dbprintf("maxDataLen=%d, Uart.state=%x, Uart.len=%d", maxDataLen, Uart.state, Uart.len);
        Dbprintf("traceLen=%d, Uart.output[0]=%08x", BigBuf_get_traceLen(), (uint32_t)Uart.output[0]);
        Dbprintf("maxDataLen=%d, Uart.state=%x, Uart.len=%d", maxDataLen, Uart.state, Uart.len);
        Dbprintf("traceLen=%d, Uart.output[0]=%08x", BigBuf_get_traceLen(), (uint32_t)Uart.output[0]);
-       LEDsoff();
+       
+       set_tracing(FALSE);     
 }
 
 //-----------------------------------------------------------------------------
 }
 
 //-----------------------------------------------------------------------------
@@ -913,8 +912,9 @@ 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
 // 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
-// 44 * 8 data bits, 44 * 1 parity bits, 9 start bits, 9 stop bits, 9 correction bits
-#define ALLOCATED_TAG_MODULATION_BUFFER_SIZE 370  //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
 
 bool prepare_allocated_tag_modulation(tag_response_info_t* response_info) {
   // Retrieve and store the current buffer index
@@ -937,9 +937,8 @@ 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.
 //-----------------------------------------------------------------------------
 // Main loop of simulated tag: receive commands from reader, decide what
 // response to send, and send it.
 //-----------------------------------------------------------------------------
-void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data)
+void SimulateIso14443aTag(int tagType, int flags, byte_t* data)
 {
 {
-
        //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...
        //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...
@@ -947,15 +946,12 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data)
        uint8_t ar_nr_collected = 0;
        
        uint8_t sak;
        uint8_t ar_nr_collected = 0;
        
        uint8_t sak;
-
-       uint8_t blockzeros[512];
-       memset(blockzeros, 0x00, sizeof(blockzeros));
                                        
        // PACK response to PWD AUTH for EV1/NTAG
                                        
        // PACK response to PWD AUTH for EV1/NTAG
-       uint8_t response8[4];
+       uint8_t response8[4] =  {0,0,0,0};
        
        // The first response contains the ATQA (note: bytes are transmitted in reverse order).
        
        // The first response contains the ATQA (note: bytes are transmitted in reverse order).
-       uint8_t response1[2];
+       uint8_t response1[2] =  {0,0};
        
        switch (tagType) {
                case 1: { // MIFARE Classic
        
        switch (tagType) {
                case 1: { // MIFARE Classic
@@ -1052,7 +1048,7 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data)
        response3a[0] = sak & 0xFB;
        ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]);
 
        response3a[0] = sak & 0xFB;
        ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]);
 
-       uint8_t response5[] = { 0x01, 0x01, 0x01, 0x01 }; // Very random tag nonce
+       uint8_t response5[] = { 0x00, 0x00, 0x00, 0x00 }; // 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
        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
@@ -1064,7 +1060,10 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data)
        //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
        
        //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
        
-       #define TAG_RESPONSE_COUNT 9
+       // 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
        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
@@ -1075,6 +1074,7 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data)
                { .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 = 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
        };
 
        // Allocate 512 bytes for the dynamic modulation, created when the reader queries for it
@@ -1090,6 +1090,9 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data)
                .modulation_n = 0
        };
   
                .modulation_n = 0
        };
   
+       // We need to listen to the high-frequency, peak-detected path.
+       iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN);
+
        BigBuf_free_keep_EM();
 
        // allocate buffers:
        BigBuf_free_keep_EM();
 
        // allocate buffers:
@@ -1118,9 +1121,6 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data)
        int happened2 = 0;
        int cmdsRecvd = 0;
 
        int happened2 = 0;
        int cmdsRecvd = 0;
 
-       // We need to listen to the high-frequency, peak-detected path.
-       iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN);
-
        cmdsRecvd = 0;
        tag_response_info_t* p_response;
 
        cmdsRecvd = 0;
        tag_response_info_t* p_response;
 
@@ -1152,11 +1152,10 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data)
                } else if(receivedCmd[0] == 0x30) {     // Received a (plain) READ
                        uint8_t block = receivedCmd[1];
                        if ( tagType == 7 ) {
                } else if(receivedCmd[0] == 0x30) {     // Received a (plain) READ
                        uint8_t block = receivedCmd[1];
                        if ( tagType == 7 ) {
+                               uint16_t start = 4 * block;
                                
                                
-                               if ( block < 4 ) {
+                               /*if ( block < 4 ) {
                                    //NTAG 215
                                    //NTAG 215
-                                       uint8_t start = 4 * block;
-                                       
                                        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],
                                        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],
@@ -1167,12 +1166,14 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data)
                                        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,
                                        0x00,0x00,0x00,0x00,
                                        0x00,0x00};
-                                       ComputeCrc14443(CRC_14443_A, blockdata+start, 16, blockdata+start+17, blockdata+start+18);
-                                       EmSendCmdEx( blockdata+start, 18, false);
-                               } else {                                
-                                       ComputeCrc14443(CRC_14443_A, blockzeros,16, blockzeros+17,blockzeros+18);
-                                       EmSendCmdEx(blockzeros,18,false);
-                               }
+                                       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 {                        
                                p_response = NULL;
                                
                        } else {                        
@@ -1181,11 +1182,16 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data)
                                // We already responded, do not send anything with the EmSendCmd14443aRaw() that is called below
                                p_response = NULL;
                        }
                                // 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   -- just returns all zeros.
-                               uint8_t len = (receivedCmd[2]- receivedCmd[1] ) * 4;
-                               ComputeCrc14443(CRC_14443_A, blockzeros,len, blockzeros+len+1, blockzeros+len+2);
-                               EmSendCmdEx(blockzeros,len+2,false);                            
-                               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,
                } 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,
@@ -1193,14 +1199,25 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data)
                                                                  0xcf,0xd3,0x61,0x36,0xca,0x5f,0xbb,0x05,
                                                                  0xce,0x21,0x24,0x5b,0xa6,0x7a,0x79,0x07,
                                                                  0x00,0x00};
                                                                  0xcf,0xd3,0x61,0x36,0xca,0x5f,0xbb,0x05,
                                                                  0xce,0x21,0x24,0x5b,0xa6,0x7a,0x79,0x07,
                                                                  0x00,0x00};
-                               ComputeCrc14443(CRC_14443_A, data, sizeof(data), data+33, data+34);
-                               EmSendCmdEx(data,sizeof(data),false);                           
+                               AppendCrc14443a(data, sizeof(data)-2);
+                               EmSendCmdEx(data,sizeof(data),false);
                                p_response = NULL;                                      
                } else if(receivedCmd[0] == 0x39 && tagType == 7) {     // Received a READ COUNTER -- 
                                p_response = NULL;                                      
                } else if(receivedCmd[0] == 0x39 && tagType == 7) {     // Received a READ COUNTER -- 
-                               uint8_t data[] =  {0x00,0x00,0x00,0x00,0x00};
-                               ComputeCrc14443(CRC_14443_A, data, sizeof(data), data+4, data+5);
+                               uint8_t data[] =  {0x00,0x00,0x00,0x14,0xa5};
                                EmSendCmdEx(data,sizeof(data),false);                           
                                EmSendCmdEx(data,sizeof(data),false);                           
-                               p_response = NULL;                      
+                               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) {
                } else if(receivedCmd[0] == 0x50) {     // Received a HALT
 
                        if (tracing) {
@@ -1257,6 +1274,16 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data)
                                                                ar_nr_responses[8], // AR2
                                                                ar_nr_responses[9]  // NR2
                                                        );
                                                                ar_nr_responses[8], // AR2
                                                                ar_nr_responses[9]  // NR2
                                                        );
+                                                       Dbprintf("../tools/mfkey/mfkey32v2 %06x%08x %08x %08x %08x %08x %08x %08x",
+                                                               ar_nr_responses[0], // UID1
+                                                               ar_nr_responses[1], // UID2
+                                                               ar_nr_responses[2], // NT1
+                                                               ar_nr_responses[3], // AR1
+                                                               ar_nr_responses[4], // NR1
+                                                               ar_nr_responses[7], // NT2
+                                                               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);
                                        }
                                        uint8_t len = ar_nr_collected*5*4;
                                        cmd_send(CMD_ACK,CMD_SIMULATE_MIFARE_CARD,len,0,&ar_nr_responses,len);
@@ -1272,14 +1299,23 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data)
                {
                        if ( tagType == 7 ) {
                                p_response =  &responses[8]; // PACK response
                {
                        if ( tagType == 7 ) {
                                p_response =  &responses[8]; // PACK response
+                               uint32_t pwd = bytes_to_num(receivedCmd+1,4);
+                               
+                               if ( MF_DBGLEVEL >= 3)  Dbprintf("Auth attempt: %08x", pwd);    
                        }
                }
                else {
                        // Check for ISO 14443A-4 compliant commands, look at left nibble
                        switch (receivedCmd[0]) {
                        }
                }
                else {
                        // Check for ISO 14443A-4 compliant commands, look at left nibble
                        switch (receivedCmd[0]) {
-
+                               case 0x02:
+                               case 0x03: {  // IBlock (command no CID)
+                                       dynamic_response_info.response[0] = receivedCmd[0];
+                                       dynamic_response_info.response[1] = 0x90;
+                                       dynamic_response_info.response[2] = 0x00;
+                                       dynamic_response_info.response_n = 3;
+                               } break;
                                case 0x0B:
                                case 0x0B:
-                               case 0x0A: { // IBlock (command)
+                               case 0x0A: { // IBlock (command CID)
                                  dynamic_response_info.response[0] = receivedCmd[0];
                                  dynamic_response_info.response[1] = 0x00;
                                  dynamic_response_info.response[2] = 0x90;
                                  dynamic_response_info.response[0] = receivedCmd[0];
                                  dynamic_response_info.response[1] = 0x00;
                                  dynamic_response_info.response[2] = 0x90;
@@ -1299,15 +1335,17 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data)
                                  dynamic_response_info.response_n = 2;
                                } break;
                                  
                                  dynamic_response_info.response_n = 2;
                                } break;
                                  
-                               case 0xBA: { //
-                                 memcpy(dynamic_response_info.response,"\xAB\x00",2);
-                                 dynamic_response_info.response_n = 2;
+                               case 0xBA: { // ping / pong
+                                       dynamic_response_info.response[0] = 0xAB;
+                                       dynamic_response_info.response[1] = 0x00;
+                                       dynamic_response_info.response_n = 2;
                                } break;
 
                                case 0xCA:
                                case 0xC2: { // Readers sends deselect command
                                } break;
 
                                case 0xCA:
                                case 0xC2: { // Readers sends deselect command
-                                 memcpy(dynamic_response_info.response,"\xCA\x00",2);
-                                 dynamic_response_info.response_n = 2;
+                                       dynamic_response_info.response[0] = 0xCA;
+                                       dynamic_response_info.response[1] = 0x00;
+                                       dynamic_response_info.response_n = 2;
                                } break;
 
                                default: {
                                } break;
 
                                default: {
@@ -1378,10 +1416,15 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data)
        }
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        }
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-       
-       Dbprintf("%x %x %x", happened, happened2, cmdsRecvd);
-       LED_A_OFF();
+       set_tracing(FALSE);
        BigBuf_free_keep_EM();
        BigBuf_free_keep_EM();
+       LED_A_OFF();
+       
+       if (MF_DBGLEVEL >= 4){
+               Dbprintf("-[ Wake ups after halt [%d]", happened);
+               Dbprintf("-[ Messages after halt [%d]", happened2);
+               Dbprintf("-[ Num of received cmd [%d]", cmdsRecvd);
+       }
 }
 
 
 }
 
 
@@ -1392,7 +1435,7 @@ void PrepareDelayedTransfer(uint16_t delay)
        uint8_t bitmask = 0;
        uint8_t bits_to_shift = 0;
        uint8_t bits_shifted = 0;
        uint8_t bitmask = 0;
        uint8_t bits_to_shift = 0;
        uint8_t bits_shifted = 0;
-       
+
        delay &= 0x07;
        if (delay) {
                for (uint16_t i = 0; i < delay; i++) {
        delay &= 0x07;
        if (delay) {
                for (uint16_t i = 0; i < delay; i++) {
@@ -1662,9 +1705,7 @@ static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNe
                        FpgaSendQueueDelay = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
                }
        
                        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:
        }
 
        // Ensure that the FPGA Delay Queue is empty before we switch to TAGSIM_LISTEN again:
@@ -1794,7 +1835,6 @@ static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, uint8_t *receive
        }
 }
 
        }
 }
 
-
 void ReaderTransmitBitsPar(uint8_t* frame, uint16_t bits, uint8_t *par, uint32_t *timing)
 {
        CodeIso14443aBitsAsReaderPar(frame, bits, par);
 void ReaderTransmitBitsPar(uint8_t* frame, uint16_t bits, uint8_t *par, uint32_t *timing)
 {
        CodeIso14443aBitsAsReaderPar(frame, bits, par);
@@ -1810,13 +1850,11 @@ void ReaderTransmitBitsPar(uint8_t* frame, uint16_t bits, uint8_t *par, uint32_t
        }
 }
 
        }
 }
 
-
 void ReaderTransmitPar(uint8_t* frame, uint16_t len, uint8_t *par, uint32_t *timing)
 {
   ReaderTransmitBitsPar(frame, len*8, par, timing);
 }
 
 void ReaderTransmitPar(uint8_t* frame, uint16_t len, uint8_t *par, uint32_t *timing)
 {
   ReaderTransmitBitsPar(frame, len*8, par, timing);
 }
 
-
 void ReaderTransmitBits(uint8_t* frame, uint16_t len, uint32_t *timing)
 {
   // Generate parity and redirect
 void ReaderTransmitBits(uint8_t* frame, uint16_t len, uint32_t *timing)
 {
   // Generate parity and redirect
@@ -1825,7 +1863,6 @@ void ReaderTransmitBits(uint8_t* frame, uint16_t len, uint32_t *timing)
   ReaderTransmitBitsPar(frame, len, par, timing);
 }
 
   ReaderTransmitBitsPar(frame, len, par, timing);
 }
 
-
 void ReaderTransmit(uint8_t* frame, uint16_t len, uint32_t *timing)
 {
   // Generate parity and redirect
 void ReaderTransmit(uint8_t* frame, uint16_t len, uint32_t *timing)
 {
   // Generate parity and redirect
@@ -2145,6 +2182,7 @@ void ReaderIso14443a(UsbCommand *c)
        }
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        }
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       set_tracing(FALSE);
        LEDsoff();
 }
 
        LEDsoff();
 }
 
@@ -2154,13 +2192,15 @@ void ReaderIso14443a(UsbCommand *c)
 // Therefore try in alternating directions.
 int32_t dist_nt(uint32_t nt1, uint32_t nt2) {
 
 // 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;
 
        if (nt1 == nt2) return 0;
 
-       uint16_t i;
-       uint32_t nttmp1 = nt1;
-       uint32_t nttmp2 = nt2;
+       nttmp1 = nt1;
+       nttmp2 = nt2;
        
        
-       for (i = 1; i < 32768; i++) {
+       for (i = 1; i < 0xFFFF; i++) {
                nttmp1 = prng_successor(nttmp1, 1);
                if (nttmp1 == nt2) return i;
                nttmp2 = prng_successor(nttmp2, 1);
                nttmp1 = prng_successor(nttmp1, 1);
                if (nttmp1 == nt2) return i;
                nttmp2 = prng_successor(nttmp2, 1);
@@ -2177,27 +2217,32 @@ 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)
 //-----------------------------------------------------------------------------
 // Cloning MiFare Classic Rail and Building Passes, Anywhere, Anytime"
 // (article by Nicolas T. Courtois, 2009)
 //-----------------------------------------------------------------------------
-void ReaderMifare(bool first_try) {
+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];
+
+       if (first_try) { 
+               iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
+       }
+       
        // free eventually allocated BigBuf memory. We want all for tracing.
        BigBuf_free();
        
        clear_trace();
        set_tracing(TRUE);
 
        // 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;
        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] = {0x00};
-       //uint32_t cuid = 0x00;
+       uint8_t uid[10]  ={0};
+       uint32_t cuid;
 
        uint32_t nt = 0;
        uint32_t previous_nt = 0;
 
        uint32_t nt = 0;
        uint32_t previous_nt = 0;
@@ -2205,22 +2250,20 @@ void ReaderMifare(bool first_try) {
        byte_t par_list[8] = {0x00};
        byte_t ks_list[8] = {0x00};
 
        byte_t par_list[8] = {0x00};
        byte_t ks_list[8] = {0x00};
 
+   #define PRNG_SEQUENCE_LENGTH  (1 << 16);
        static uint32_t sync_time = 0;
        static uint32_t sync_time = 0;
-       static uint32_t sync_cycles = 0;
+       static int32_t sync_cycles = 0;
        int catch_up_cycles = 0;
        int last_catch_up = 0;
        int catch_up_cycles = 0;
        int last_catch_up = 0;
+       uint16_t elapsed_prng_sequences;
        uint16_t consecutive_resyncs = 0;
        int isOK = 0;
 
        uint16_t consecutive_resyncs = 0;
        int isOK = 0;
 
-       int numWrongDistance = 0;
-       
        if (first_try) { 
                mf_nr_ar3 = 0;
        if (first_try) { 
                mf_nr_ar3 = 0;
-               iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
                sync_time = GetCountSspClk() & 0xfffffff8;
                sync_time = GetCountSspClk() & 0xfffffff8;
-               sync_cycles = 65536;                                                                    // theory: Mifare Classic's random generator repeats every 2^16 cycles (and so do the nonces).
+               sync_cycles = PRNG_SEQUENCE_LENGTH; //65536;    //0x10000                       // theory: Mifare Classic's random generator repeats every 2^16 cycles (and so do the nonces).
                nt_attacked = 0;
                nt_attacked = 0;
-               nt = 0;
                par[0] = 0;
        }
        else {
                par[0] = 0;
        }
        else {
@@ -2233,36 +2276,85 @@ void ReaderMifare(bool first_try) {
        LED_A_ON();
        LED_B_OFF();
        LED_C_OFF();
        LED_A_ON();
        LED_B_OFF();
        LED_C_OFF();
-       LED_C_ON();     
+       
+
+       #define MAX_UNEXPECTED_RANDOM   4               // maximum number of unexpected (i.e. real) random numbers when trying to sync. Then give up.
+       #define MAX_SYNC_TRIES                  32
+       #define NUM_DEBUG_INFOS                 8               // per strategy
+       #define MAX_STRATEGY                    3
+       uint16_t unexpected_random = 0;
+       uint16_t sync_tries = 0;
+       int16_t debug_info_nr = -1;
+       uint16_t strategy = 0;
+       int32_t debug_info[MAX_STRATEGY][NUM_DEBUG_INFOS];
+       uint32_t select_time;
+       uint32_t halt_time;
   
        for(uint16_t i = 0; TRUE; i++) {
                
   
        for(uint16_t i = 0; TRUE; i++) {
                
+               LED_C_ON();
                WDT_HIT();
 
                // Test if the action was cancelled
                WDT_HIT();
 
                // Test if the action was cancelled
-               if(BUTTON_PRESS()) break;
-               
-               if (numWrongDistance > 1000) {
-                       isOK = 0;
+               if(BUTTON_PRESS()) {
+                       isOK = -1;
                        break;
                }
                
                        break;
                }
                
-               //if(!iso14443a_select_card(uid, NULL, &cuid)) {
-               if(!iso14443a_select_card(uid, NULL, NULL)) {
+               if (strategy == 2) {
+                       // test with additional hlt command
+                       halt_time = 0;
+                       int len = mifare_sendcmd_short(NULL, false, 0x50, 0x00, receivedAnswer, receivedAnswerPar, &halt_time);
+                       if (len && MF_DBGLEVEL >= 3) {
+                               Dbprintf("Unexpected response of %d bytes to hlt command (additional debugging).", len);
+                       }
+               }
+
+               if (strategy == 3) {
+                       // test with FPGA power off/on
+                       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+                       SpinDelay(200);
+                       iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
+                       SpinDelay(100);
+               }
+               
+               if(!iso14443a_select_card(uid, NULL, &cuid)) {
                        if (MF_DBGLEVEL >= 1)   Dbprintf("Mifare: Can't select card");
                        continue;
                }
                        if (MF_DBGLEVEL >= 1)   Dbprintf("Mifare: Can't select card");
                        continue;
                }
+               select_time = GetCountSspClk();
 
 
-               sync_time = (sync_time & 0xfffffff8) + sync_cycles + catch_up_cycles;
-               catch_up_cycles = 0;
+               elapsed_prng_sequences = 1;
+               if (debug_info_nr == -1) {
+                       sync_time = (sync_time & 0xfffffff8) + sync_cycles + catch_up_cycles;
+                       catch_up_cycles = 0;
 
 
-               // if we missed the sync time already, advance to the next nonce repeat
-               while(GetCountSspClk() > sync_time) {
-                       sync_time = (sync_time & 0xfffffff8) + sync_cycles;
-               }
+                       // if we missed the sync time already, advance to the next nonce repeat
+                       while(GetCountSspClk() > sync_time) {
+                               elapsed_prng_sequences++;
+                               sync_time = (sync_time & 0xfffffff8) + sync_cycles;
+                       }
 
 
-               // Transmit MIFARE_CLASSIC_AUTH at synctime. Should result in returning the same tag nonce (== nt_attacked) 
-               ReaderTransmit(mf_auth, sizeof(mf_auth), &sync_time);
+                       // Transmit MIFARE_CLASSIC_AUTH at synctime. Should result in returning the same tag nonce (== nt_attacked) 
+                       ReaderTransmit(mf_auth, sizeof(mf_auth), &sync_time);
+               } else {
+                       // collect some information on tag nonces for debugging:
+                       #define DEBUG_FIXED_SYNC_CYCLES PRNG_SEQUENCE_LENGTH
+                       if (strategy == 0) {
+                               // nonce distances at fixed time after card select:
+                               sync_time = select_time + DEBUG_FIXED_SYNC_CYCLES;
+                       } else if (strategy == 1) {
+                               // nonce distances at fixed time between authentications:
+                               sync_time = sync_time + DEBUG_FIXED_SYNC_CYCLES;
+                       } else if (strategy == 2) {
+                               // nonce distances at fixed time after halt:
+                               sync_time = halt_time + DEBUG_FIXED_SYNC_CYCLES;
+                       } else {
+                               // nonce_distances at fixed time after power on
+                               sync_time = DEBUG_FIXED_SYNC_CYCLES;
+                       }
+                       ReaderTransmit(mf_auth, sizeof(mf_auth), &sync_time);
+               }                       
 
                // Receive the (4 Byte) "random" nonce
                if (!ReaderReceive(receivedAnswer, receivedAnswerPar)) {
 
                // Receive the (4 Byte) "random" nonce
                if (!ReaderReceive(receivedAnswer, receivedAnswerPar)) {
@@ -2280,28 +2372,48 @@ void ReaderMifare(bool first_try) {
                        int nt_distance = dist_nt(previous_nt, nt);
                        if (nt_distance == 0) {
                                nt_attacked = nt;
                        int nt_distance = dist_nt(previous_nt, nt);
                        if (nt_distance == 0) {
                                nt_attacked = nt;
-                       }
-                       else {
-                               
-                               // 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;
+                       } else {
+                               if (nt_distance == -99999) { // invalid nonce received
+                                       unexpected_random++;
+                                       if (unexpected_random > MAX_UNEXPECTED_RANDOM) {
+                                               isOK = -3;              // Card has an unpredictable PRNG. Give up      
+                                               break;
+                                       } else {
+                                               continue;               // continue trying...
+                                       }
+                               }
+                               if (++sync_tries > MAX_SYNC_TRIES) {
+                                       if (strategy > MAX_STRATEGY || MF_DBGLEVEL < 3) {
+                                               isOK = -4;                      // Card's PRNG runs at an unexpected frequency or resets unexpectedly
+                                               break;
+                                       } else {                                // continue for a while, just to collect some debug info
+                                               debug_info[strategy][debug_info_nr] = nt_distance;
+                                               debug_info_nr++;
+                                               if (debug_info_nr == NUM_DEBUG_INFOS) {
+                                                       strategy++;
+                                                       debug_info_nr = 0;
+                                               }
+                                               continue;
+                                       }
+                               }
+                               sync_cycles = (sync_cycles - nt_distance/elapsed_prng_sequences);
+                               if (sync_cycles <= 0) {
+                                       sync_cycles += PRNG_SEQUENCE_LENGTH;
+                               }
+                               if (MF_DBGLEVEL >= 3) {
+                                       Dbprintf("calibrating in cycle %d. nt_distance=%d, elapsed_prng_sequences=%d, new sync_cycles: %d\n", i, nt_distance, elapsed_prng_sequences, sync_cycles);
                                }
                                }
-                               
-                               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;
                        }
                }
 
                if ((nt != nt_attacked) && nt_attacked) {       // we somehow lost sync. Try to catch up again...
                        catch_up_cycles = -dist_nt(nt_attacked, nt);
                                continue;
                        }
                }
 
                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;
                        }
                                catch_up_cycles = 0;
                                continue;
                        }
+                       catch_up_cycles /= elapsed_prng_sequences;
                        if (catch_up_cycles == last_catch_up) {
                                consecutive_resyncs++;
                        }
                        if (catch_up_cycles == last_catch_up) {
                                consecutive_resyncs++;
                        }
@@ -2315,6 +2427,9 @@ void ReaderMifare(bool first_try) {
                        else {  
                                sync_cycles = sync_cycles + catch_up_cycles;
                                if (MF_DBGLEVEL >= 3) Dbprintf("Lost sync in cycle %d for the fourth time consecutively (nt_distance = %d). Adjusting sync_cycles to %d.\n", i, -catch_up_cycles, sync_cycles);
                        else {  
                                sync_cycles = sync_cycles + catch_up_cycles;
                                if (MF_DBGLEVEL >= 3) Dbprintf("Lost sync in cycle %d for the fourth time consecutively (nt_distance = %d). Adjusting sync_cycles to %d.\n", i, -catch_up_cycles, sync_cycles);
+                               last_catch_up = 0;
+                               catch_up_cycles = 0;
+                               consecutive_resyncs = 0;
                        }
                        continue;
                }
                        }
                        continue;
                }
@@ -2322,12 +2437,10 @@ void ReaderMifare(bool first_try) {
                consecutive_resyncs = 0;
                
                // Receive answer. This will be a 4 Bit NACK when the 8 parity bits are OK after decoding
                consecutive_resyncs = 0;
                
                // Receive answer. This will be a 4 Bit NACK when the 8 parity bits are OK after decoding
-               if (ReaderReceive(receivedAnswer, receivedAnswerPar))
-               {
+               if (ReaderReceive(receivedAnswer, receivedAnswerPar)) {
                        catch_up_cycles = 8;    // the PRNG is delayed by 8 cycles due to the NAC (4Bits = 0x05 encrypted) transfer
        
                        catch_up_cycles = 8;    // the PRNG is delayed by 8 cycles due to the NAC (4Bits = 0x05 encrypted) transfer
        
-                       if (nt_diff == 0)
-                       {
+                       if (nt_diff == 0) {
                                par_low = par[0] & 0xE0; // there is no need to check all parities for other nt_diff. Parity Bits for mf_nr_ar[0..2] won't change
                        }
 
                                par_low = par[0] & 0xE0; // there is no need to check all parities for other nt_diff. Parity Bits for mf_nr_ar[0..2] won't change
                        }
 
@@ -2350,16 +2463,30 @@ void ReaderMifare(bool first_try) {
                        if (nt_diff == 0 && first_try)
                        {
                                par[0]++;
                        if (nt_diff == 0 && first_try)
                        {
                                par[0]++;
+                               if (par[0] == 0x00) {           // tried all 256 possible parities without success. Card doesn't send NACK.
+                                       isOK = -2;
+                                       break;
+                               }
                        } else {
                                par[0] = ((par[0] & 0x1F) + 1) | par_low;
                        }
                }
        }
 
                        } else {
                                par[0] = ((par[0] & 0x1F) + 1) | par_low;
                        }
                }
        }
 
+
        mf_nr_ar[3] &= 0x1F;
        
        mf_nr_ar[3] &= 0x1F;
        
-       byte_t buf[28] = {0x00};
+       if (isOK == -4) {
+               if (MF_DBGLEVEL >= 3) {
+                       for (uint16_t i = 0; i <= MAX_STRATEGY; i++) {
+                               for(uint16_t j = 0; j < NUM_DEBUG_INFOS; j++) {
+                                       Dbprintf("collected debug info[%d][%d] = %d", i, j, debug_info[i][j]);
+                               }
+                       }
+               }
+       }
        
        
+       byte_t buf[28];
        memcpy(buf + 0,  uid, 4);
        num_to_bytes(nt, 4, buf + 4);
        memcpy(buf + 8,  par_list, 8);
        memcpy(buf + 0,  uid, 4);
        num_to_bytes(nt, 4, buf + 4);
        memcpy(buf + 8,  par_list, 8);
@@ -2368,13 +2495,14 @@ void ReaderMifare(bool first_try) {
                
        cmd_send(CMD_ACK,isOK,0,0,buf,28);
 
                
        cmd_send(CMD_ACK,isOK,0,0,buf,28);
 
-       set_tracing(FALSE);
+       // Thats it...
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        LEDsoff();
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        LEDsoff();
-}
 
 
+       set_tracing(FALSE);
+}
 
 
- /*
+/**
   *MIFARE 1K simulate.
   *
   *@param flags :
   *MIFARE 1K simulate.
   *
   *@param flags :
@@ -2414,8 +2542,8 @@ 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 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}; // Mifare Classic
-       uint8_t rSAK[] = {0x09, 0x3f, 0xcc };  // Mifare Mini 
+       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, 0x01, 0x01, 0x01};
        uint8_t rSAK1[] = {0x04, 0xda, 0x17};
 
        uint8_t rAUTH_NT[] = {0x01, 0x01, 0x01, 0x01};
@@ -2427,13 +2555,6 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
        uint32_t ar_nr_responses[] = {0,0,0,0,0,0,0,0,0,0};
        uint8_t ar_nr_collected = 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
-       BigBuf_free_keep_EM();
-
-       // clear trace
-       clear_trace();
-       set_tracing(TRUE);
-
        // Authenticate response - nonce
        uint32_t nonce = bytes_to_num(rAUTH_NT, 4);
        
        // Authenticate response - nonce
        uint32_t nonce = bytes_to_num(rAUTH_NT, 4);
        
@@ -2480,10 +2601,6 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3];
        }
 
                rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3];
        }
 
-       // We need to listen to the high-frequency, peak-detected path.
-       iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN);
-
-
        if (MF_DBGLEVEL >= 1)   {
                if (!_7BUID) {
                        Dbprintf("4B UID: %02x%02x%02x%02x", 
        if (MF_DBGLEVEL >= 1)   {
                if (!_7BUID) {
                        Dbprintf("4B UID: %02x%02x%02x%02x", 
@@ -2495,6 +2612,17 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                }
        }
 
                }
        }
 
+       // We need to listen to the high-frequency, peak-detected path.
+       iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN);
+
+       // free eventually allocated BigBuf memory but keep Emulator Memory
+       BigBuf_free_keep_EM();
+
+       // clear trace
+       clear_trace();
+       set_tracing(TRUE);
+
+
        bool finished = FALSE;
        while (!BUTTON_PRESS() && !finished) {
                WDT_HIT();
        bool finished = FALSE;
        while (!BUTTON_PRESS() && !finished) {
                WDT_HIT();
@@ -2880,6 +3008,16 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                                        ar_nr_responses[8], // AR2
                                        ar_nr_responses[9]  // NR2
                                        );
                                        ar_nr_responses[8], // AR2
                                        ar_nr_responses[9]  // NR2
                                        );
+                       Dbprintf("../tools/mfkey/mfkey32v2 %06x%08x %08x %08x %08x %08x %08x %08x",
+                                       ar_nr_responses[0], // UID1
+                                       ar_nr_responses[1], // UID2
+                                       ar_nr_responses[2], // NT1
+                                       ar_nr_responses[3], // AR1
+                                       ar_nr_responses[4], // NR1
+                                       ar_nr_responses[7], // NT2
+                                       ar_nr_responses[8], // AR2
+                                       ar_nr_responses[9]  // NR2
+                                       );
                } else {
                        Dbprintf("Failed to obtain two AR/NR pairs!");
                        if(ar_nr_collected > 0 ) {
                } else {
                        Dbprintf("Failed to obtain two AR/NR pairs!");
                        if(ar_nr_collected > 0 ) {
@@ -2894,6 +3032,8 @@ 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 ", tracing, BigBuf_get_traceLen());
                }
        }
        if (MF_DBGLEVEL >= 1)   Dbprintf("Emulator stopped. Tracing: %d  trace length: %d ", tracing, BigBuf_get_traceLen());
+       
+       set_tracing(FALSE);
 }
 
 
 }
 
 
@@ -2906,9 +3046,6 @@ void RAMFUNC SniffMifare(uint8_t param) {
        // bit 0 - trigger from first card answer
        // bit 1 - trigger from first reader 7-bit request
 
        // 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
        // C(red) A(yellow) B(green)
        LEDsoff();
        // init trace buffer
@@ -2924,6 +3061,10 @@ void RAMFUNC SniffMifare(uint8_t param) {
        uint8_t receivedResponse[MAX_MIFARE_FRAME_SIZE];
        uint8_t receivedResponsePar[MAX_MIFARE_PARITY_SIZE];
 
        uint8_t receivedResponse[MAX_MIFARE_FRAME_SIZE];
        uint8_t receivedResponsePar[MAX_MIFARE_PARITY_SIZE];
 
+       iso14443a_setup(FPGA_HF_ISO14443A_SNIFFER);
+
+       // 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;
        // allocate the DMA buffer, used to stream samples from the FPGA
        uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE);
        uint8_t *data = dmaBuf;
@@ -2933,8 +3074,6 @@ void RAMFUNC SniffMifare(uint8_t param) {
        bool ReaderIsActive = FALSE;
        bool TagIsActive = FALSE;
 
        bool ReaderIsActive = FALSE;
        bool TagIsActive = FALSE;
 
-       iso14443a_setup(FPGA_HF_ISO14443A_SNIFFER);
-
        // Set up the demodulator for tag -> reader responses.
        DemodInit(receivedResponse, receivedResponsePar);
 
        // Set up the demodulator for tag -> reader responses.
        DemodInit(receivedResponse, receivedResponsePar);
 
@@ -3014,7 +3153,6 @@ void RAMFUNC SniffMifare(uint8_t param) {
                                        if (MfSniffLogic(receivedCmd, Uart.len, Uart.parity, Uart.bitCount, TRUE)) break;
 
                                        /* And ready to receive another command. */
                                        if (MfSniffLogic(receivedCmd, Uart.len, Uart.parity, Uart.bitCount, TRUE)) break;
 
                                        /* And ready to receive another command. */
-                                       //UartInit(receivedCmd, receivedCmdPar);
                                        UartReset();
                                        
                                        /* And also reset the demod code */
                                        UartReset();
                                        
                                        /* And also reset the demod code */
@@ -3035,6 +3173,7 @@ void RAMFUNC SniffMifare(uint8_t param) {
 
                                        // And reset the Miller decoder including its (now outdated) input buffer
                                        UartInit(receivedCmd, receivedCmdPar);
 
                                        // And reset the Miller decoder including its (now outdated) input buffer
                                        UartInit(receivedCmd, receivedCmdPar);
+                                       // why not UartReset?
                                }
                                TagIsActive = (Demod.state != DEMOD_UNSYNCD);
                        }
                                }
                                TagIsActive = (Demod.state != DEMOD_UNSYNCD);
                        }
@@ -3049,11 +3188,9 @@ void RAMFUNC SniffMifare(uint8_t param) {
 
        } // main cycle
 
 
        } // main cycle
 
-       DbpString("COMMAND FINISHED");
-
        FpgaDisableSscDma();
        MfSniffEnd();
        FpgaDisableSscDma();
        MfSniffEnd();
-       
-       Dbprintf("maxDataLen=%x, Uart.state=%x, Uart.len=%x", maxDataLen, Uart.state, Uart.len);
        LEDsoff();
        LEDsoff();
+       Dbprintf("maxDataLen=%x, Uart.state=%x, Uart.len=%x", maxDataLen, Uart.state, Uart.len);
+       set_tracing(FALSE);
 }
 }
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