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Merge branch 'master' of https://github.com/iceman1001/proxmark3
[proxmark3-svn] / armsrc / iso14443a.c
diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c
index 71f000d00901c9c62b2c4aa28852b365d37c4b31..8e1b7b7d692a3339f8c3b245b2b3f3b21e29c55e 100644 (file)
--- a/armsrc/iso14443a.c
+++ b/armsrc/iso14443a.c
@@ -1,4 +1,4 @@
-//-----------------------------------------------------------------------------
+ //-----------------------------------------------------------------------------
 // Merlok - June 2011, 2012
 // Gerhard de Koning Gans - May 2008
 // Hagen Fritsch - June 2010
 // Merlok - June 2011, 2012
 // Gerhard de Koning Gans - May 2008
 // Hagen Fritsch - June 2010
@@ -20,6 +20,8 @@
 #include "crapto1.h"
 #include "mifareutil.h"
 #include "BigBuf.h"
 #include "crapto1.h"
 #include "mifareutil.h"
 #include "BigBuf.h"
+#include "parity.h"
+
 static uint32_t iso14a_timeout;
 int rsamples = 0;
 uint8_t trigger = 0;
 static uint32_t iso14a_timeout;
 int rsamples = 0;
 uint8_t trigger = 0;
@@ -121,26 +123,6 @@ static uint32_t LastProxToAirDuration;
 #define        SEC_Y 0x00
 #define        SEC_Z 0xc0
 
 #define        SEC_Y 0x00
 #define        SEC_Z 0xc0
 
-const uint8_t OddByteParity[256] = {
-  1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
-  0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
-  0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
-  1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
-  0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
-  1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
-  1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
-  0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
-  0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
-  1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
-  1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
-  0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
-  1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
-  0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
-  0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
-  1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1
-};
-
-
 void iso14a_set_trigger(bool enable) {
        trigger = enable;
 }
 void iso14a_set_trigger(bool enable) {
        trigger = enable;
 }
@@ -178,11 +160,6 @@ void iso14a_set_ATS_timeout(uint8_t *ats) {
 // Generate the parity value for a byte sequence
 //
 //-----------------------------------------------------------------------------
 // Generate the parity value for a byte sequence
 //
 //-----------------------------------------------------------------------------
-byte_t oddparity (const byte_t bt)
-{
-       return OddByteParity[bt];
-}
-
 void GetParity(const uint8_t *pbtCmd, uint16_t iLen, uint8_t *par)
 {
        uint16_t paritybit_cnt = 0;
 void GetParity(const uint8_t *pbtCmd, uint16_t iLen, uint8_t *par)
 {
        uint16_t paritybit_cnt = 0;
@@ -191,7 +168,7 @@ void GetParity(const uint8_t *pbtCmd, uint16_t iLen, uint8_t *par)
 
        for (uint16_t i = 0; i < iLen; i++) {
                // Generate the parity bits
 
        for (uint16_t i = 0; i < iLen; i++) {
                // Generate the parity bits
-               parityBits |= ((OddByteParity[pbtCmd[i]]) << (7-paritybit_cnt));
+               parityBits |= ((oddparity8(pbtCmd[i])) << (7-paritybit_cnt));
                if (paritybit_cnt == 7) {
                        par[paritybyte_cnt] = parityBits;       // save 8 Bits parity
                        parityBits = 0;                                         // and advance to next Parity Byte
                if (paritybit_cnt == 7) {
                        par[paritybyte_cnt] = parityBits;       // save 8 Bits parity
                        parityBits = 0;                                         // and advance to next Parity Byte
@@ -718,6 +695,8 @@ void RAMFUNC SniffIso14443a(uint8_t param) {
 
        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]);
+       
+       set_tracing(FALSE);     
 }
 
 //-----------------------------------------------------------------------------
 }
 
 //-----------------------------------------------------------------------------
@@ -937,7 +916,7 @@ bool prepare_allocated_tag_modulation(tag_response_info_t* response_info) {
 //-----------------------------------------------------------------------------
 void SimulateIso14443aTag(int tagType, int flags, byte_t* data)
 {
 //-----------------------------------------------------------------------------
 void SimulateIso14443aTag(int tagType, int flags, byte_t* data)
 {
-
+       uint32_t counters[] = {0,0,0};
        //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...
@@ -998,6 +977,15 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data)
                        response8[0] = 0x80;
                        response8[1] = 0x80;
                        ComputeCrc14443(CRC_14443_A, response8, 2, &response8[2], &response8[3]);
                        response8[0] = 0x80;
                        response8[1] = 0x80;
                        ComputeCrc14443(CRC_14443_A, response8, 2, &response8[2], &response8[3]);
+                       // uid not supplied then get from emulator memory
+                       if (data[0]==0) {
+                               uint16_t start = 4 * (0+12);  
+                               uint8_t emdata[8];
+                               emlGetMemBt( emdata, start, sizeof(emdata));
+                               memcpy(data, emdata, 3); //uid bytes 0-2
+                               memcpy(data+3, emdata+4, 4); //uid bytes 3-7
+                               flags |= FLAG_7B_UID_IN_DATA;
+                       }
                } break;                
                default: {
                        Dbprintf("Error: unkown tagtype (%d)",tagType);
                } break;                
                default: {
                        Dbprintf("Error: unkown tagtype (%d)",tagType);
@@ -1055,12 +1043,12 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data)
        // TC(1) = 0x02: CID supported, NAD not supported
        ComputeCrc14443(CRC_14443_A, response6, 4, &response6[4], &response6[5]);
 
        // TC(1) = 0x02: CID supported, NAD not supported
        ComputeCrc14443(CRC_14443_A, response6, 4, &response6[4], &response6[5]);
 
-       // Prepare GET_VERSION (different for EV-1 / NTAG)
+       // Prepare GET_VERSION (different for UL EV-1 / NTAG)
        //uint8_t response7_EV1[] = {0x00, 0x04, 0x03, 0x01, 0x01, 0x00, 0x0b, 0x03, 0xfd, 0xf7};  //EV1 48bytes VERSION.
        //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_NTAG[] = {0x00, 0x04, 0x04, 0x02, 0x01, 0x00, 0x11, 0x03, 0x01, 0x9e}; //NTAG 215
        
        // Prepare CHK_TEARING
        
        // Prepare CHK_TEARING
-       uint8_t response9[] =  {0xBD,0x90,0x3f};
+       //uint8_t response9[] =  {0xBD,0x90,0x3f};
        
        #define TAG_RESPONSE_COUNT 10
        tag_response_info_t responses[TAG_RESPONSE_COUNT] = {
        
        #define TAG_RESPONSE_COUNT 10
        tag_response_info_t responses[TAG_RESPONSE_COUNT] = {
@@ -1071,9 +1059,9 @@ void SimulateIso14443aTag(int tagType, int flags, 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 = 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
+               //{ .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
@@ -1105,9 +1093,8 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data)
 
        // Prepare the responses of the anticollision phase
        // there will be not enough time to do this at the moment the reader sends it REQA
 
        // Prepare the responses of the anticollision phase
        // there will be not enough time to do this at the moment the reader sends it REQA
-       for (size_t i=0; i<TAG_RESPONSE_COUNT; i++) {
+       for (size_t i=0; i<TAG_RESPONSE_COUNT; i++)
                prepare_allocated_tag_modulation(&responses[i]);
                prepare_allocated_tag_modulation(&responses[i]);
-       }
 
        int len = 0;
 
 
        int len = 0;
 
@@ -1126,7 +1113,6 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data)
        LED_A_ON();
        for(;;) {
                // Clean receive command buffer
        LED_A_ON();
        for(;;) {
                // Clean receive command buffer
-               
                if(!GetIso14443aCommandFromReader(receivedCmd, receivedCmdPar, &len)) {
                        DbpString("Button press");
                        break;
                if(!GetIso14443aCommandFromReader(receivedCmd, receivedCmdPar, &len)) {
                        DbpString("Button press");
                        break;
@@ -1150,41 +1136,27 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data)
                        p_response = &responses[4]; order = 30;
                } else if(receivedCmd[0] == 0x30) {     // Received a (plain) READ
                        uint8_t block = receivedCmd[1];
                        p_response = &responses[4]; order = 30;
                } 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 ) {
-                                   //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 {*/      
+                       // if Ultralight or NTAG (4 byte blocks)
+                       if ( tagType == 7 || tagType == 2 ) {
+                               //first 12 blocks of emu are [getversion answer - check tearing - pack - 0x00 - signature]
+                               uint16_t start = 4 * (block+12);  
                                        uint8_t emdata[MAX_MIFARE_FRAME_SIZE];
                                        emlGetMemBt( emdata, start, 16);
                                        AppendCrc14443a(emdata, 16);
                                        EmSendCmdEx(emdata, sizeof(emdata), false);                             
                                        uint8_t emdata[MAX_MIFARE_FRAME_SIZE];
                                        emlGetMemBt( emdata, start, 16);
                                        AppendCrc14443a(emdata, 16);
                                        EmSendCmdEx(emdata, sizeof(emdata), false);                             
-                               //}
+                               // We already responded, do not send anything with the EmSendCmd14443aRaw() that is called below
                                p_response = NULL;
                                p_response = NULL;
-                               
-                       } else {                        
-                               EmSendCmdEx(data+(4*block),16,false);
+                       } else { // all other tags (16 byte block tags)
+                               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
                                p_response = NULL;
                        }
                                // 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.
+               } else if(receivedCmd[0] == 0x3A) {     // Received a FAST READ (ranged read)
                                
                                uint8_t emdata[MAX_FRAME_SIZE];
                                
                                uint8_t emdata[MAX_FRAME_SIZE];
-                               int start =  receivedCmd[1] * 4;
+                               //first 12 blocks of emu are [getversion answer - check tearing - pack - 0x00 - signature]
+                               int start =  (receivedCmd[1]+12) * 4; 
                                int len   = (receivedCmd[2] - receivedCmd[1] + 1) * 4;
                                emlGetMemBt( emdata, start, len);
                                AppendCrc14443a(emdata, len);
                                int len   = (receivedCmd[2] - receivedCmd[1] + 1) * 4;
                                emlGetMemBt( emdata, start, len);
                                AppendCrc14443a(emdata, len);
@@ -1193,30 +1165,51 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data)
                                
                } 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
                                
                } 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);
+                               //first 12 blocks of emu are [getversion answer - check tearing - pack - 0x00 - signature]
+                               uint16_t start = 4 * 4;
+                               uint8_t emdata[34];
+                               emlGetMemBt( emdata, start, 32);
+                               AppendCrc14443a(emdata, 32);
+                               EmSendCmdEx(emdata, sizeof(emdata), false);
+                               //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;                                      
                                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 -- 
+               } else if (receivedCmd[0] == 0x39 && tagType == 7) {    // Received a READ COUNTER -- 
+                       uint8_t index = receivedCmd[1];
+                       uint8_t data[] =  {0x00,0x00,0x00,0x14,0xa5};
+                       if ( counters[index] > 0) {
+                               num_to_bytes(counters[index], 3, data);
+                               AppendCrc14443a(data, sizeof(data)-2);
+                       }
+                       EmSendCmdEx(data,sizeof(data),false);                           
+                       p_response = NULL;
+               } else if (receivedCmd[0] == 0xA5 && tagType == 7) {    // Received a INC COUNTER -- 
                        // number of counter
                        // number of counter
-                       //uint8_t counter = receivedCmd[1];
-                       //uint32_t val = bytes_to_num(receivedCmd+2,4);
-                       
+                       uint8_t counter = receivedCmd[1];
+                       uint32_t val = bytes_to_num(receivedCmd+2,4);
+                       counters[counter] = val;
+               
                        // 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 -- 
                        // 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];                             
+                       //first 12 blocks of emu are [getversion answer - check tearing - pack - 0x00 - signature]
+                       uint8_t emdata[3];
+                       uint8_t counter=0;
+                       if (receivedCmd[1]<3) counter = receivedCmd[1];
+                       emlGetMemBt( emdata, 10+counter, 1);
+                       AppendCrc14443a(emdata, sizeof(emdata)-2);
+                       EmSendCmdEx(emdata, sizeof(emdata), false);     
+                       p_response = NULL;
+                       //p_response = &responses[9];                           
+               
                } else if(receivedCmd[0] == 0x50) {     // Received a HALT
 
                        if (tracing) {
                } else if(receivedCmd[0] == 0x50) {     // Received a HALT
 
                        if (tracing) {
@@ -1226,7 +1219,12 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data)
                } else if(receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61) {   // Received an authentication request
                                        
                        if ( tagType == 7 ) {   // IF NTAG /EV1  0x60 == GET_VERSION, not a authentication request.
                } else if(receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61) {   // Received an authentication request
                                        
                        if ( tagType == 7 ) {   // IF NTAG /EV1  0x60 == GET_VERSION, not a authentication request.
-                               p_response = &responses[7];
+                               uint8_t emdata[10];
+                               emlGetMemBt( emdata, 0, 8 );
+                               AppendCrc14443a(emdata, sizeof(emdata)-2);
+                               EmSendCmdEx(emdata, sizeof(emdata), false);     
+                               p_response = NULL;
+                               //p_response = &responses[7];
                        } else {
                                p_response = &responses[5]; order = 7;
                        }
                        } else {
                                p_response = &responses[5]; order = 7;
                        }
@@ -1297,13 +1295,18 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data)
                else if (receivedCmd[0] == 0x1b) // NTAG / EV-1 authentication
                {
                        if ( tagType == 7 ) {
                else if (receivedCmd[0] == 0x1b) // NTAG / EV-1 authentication
                {
                        if ( tagType == 7 ) {
-                               p_response =  &responses[8]; // PACK response
+                               uint16_t start = 13; //first 4 blocks of emu are [getversion answer - check tearing - pack - 0x00]
+                               uint8_t emdata[4];
+                               emlGetMemBt( emdata, start, 2);
+                               AppendCrc14443a(emdata, 2);
+                               EmSendCmdEx(emdata, sizeof(emdata), false);
+                               p_response = NULL;
+                               //p_response =  &responses[8]; // PACK response
                                uint32_t pwd = bytes_to_num(receivedCmd+1,4);
                                
                                if ( MF_DBGLEVEL >= 3)  Dbprintf("Auth attempt: %08x", pwd);    
                        }
                                uint32_t pwd = bytes_to_num(receivedCmd+1,4);
                                
                                if ( MF_DBGLEVEL >= 3)  Dbprintf("Auth attempt: %08x", pwd);    
                        }
-               }
-               else {
+               } else {
                        // Check for ISO 14443A-4 compliant commands, look at left nibble
                        switch (receivedCmd[0]) {
                                case 0x02:
                        // Check for ISO 14443A-4 compliant commands, look at left nibble
                        switch (receivedCmd[0]) {
                                case 0x02:
@@ -1415,13 +1418,14 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data)
        }
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        }
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       set_tracing(FALSE);
        BigBuf_free_keep_EM();
        LED_A_OFF();
        
        if (MF_DBGLEVEL >= 4){
        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);
+               Dbprintf("-[ Wake ups after halt [%d]", happened);
+               Dbprintf("-[ Messages after halt [%d]", happened2);
+               Dbprintf("-[ Num of received cmd [%d]", cmdsRecvd);
        }
 }
 
        }
 }
 
@@ -1433,7 +1437,7 @@ 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++) {
@@ -1887,10 +1891,12 @@ int ReaderReceive(uint8_t *receivedAnswer, uint8_t *parity)
        return Demod.len;
 }
 
        return Demod.len;
 }
 
-/* performs iso14443a anticollision procedure
- * fills the uid pointer unless NULL
- * fills resp_data unless NULL */
-int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, uint32_t *cuid_ptr) {
+// performs iso14443a anticollision (optional) and card select procedure
+// fills the uid and cuid pointer unless NULL
+// fills the card info record unless NULL
+// if anticollision is false, then the UID must be provided in uid_ptr[] 
+// and num_cascades must be set (1: 4 Byte UID, 2: 7 Byte UID, 3: 10 Byte UID)
+int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, uint32_t *cuid_ptr, bool anticollision, uint8_t num_cascades) {
        uint8_t wupa[]       = { 0x52 };  // 0x26 - REQA  0x52 - WAKE-UP
        uint8_t sel_all[]    = { 0x93,0x20 };
        uint8_t sel_uid[]    = { 0x93,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
        uint8_t wupa[]       = { 0x52 };  // 0x26 - REQA  0x52 - WAKE-UP
        uint8_t sel_all[]    = { 0x93,0x20 };
        uint8_t sel_uid[]    = { 0x93,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
@@ -1905,7 +1911,7 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u
        int len;
 
        // Broadcast for a card, WUPA (0x52) will force response from all cards in the field
        int len;
 
        // Broadcast for a card, WUPA (0x52) will force response from all cards in the field
-    ReaderTransmitBitsPar(wupa,7,0, NULL);
+    ReaderTransmitBitsPar(wupa, 7, NULL, NULL);
        
        // Receive the ATQA
        if(!ReaderReceive(resp, resp_par)) return 0;
        
        // Receive the ATQA
        if(!ReaderReceive(resp, resp_par)) return 0;
@@ -1916,10 +1922,12 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u
                memset(p_hi14a_card->uid,0,10);
        }
 
                memset(p_hi14a_card->uid,0,10);
        }
 
+       if (anticollision) {
        // clear uid
        if (uid_ptr) {
                memset(uid_ptr,0,10);
        }
        // clear uid
        if (uid_ptr) {
                memset(uid_ptr,0,10);
        }
+       }
 
        // check for proprietary anticollision:
        if ((resp[0] & 0x1F) == 0) {
 
        // check for proprietary anticollision:
        if ((resp[0] & 0x1F) == 0) {
@@ -1933,6 +1941,7 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u
                // SELECT_* (L1: 0x93, L2: 0x95, L3: 0x97)
                sel_uid[0] = sel_all[0] = 0x93 + cascade_level * 2;
 
                // SELECT_* (L1: 0x93, L2: 0x95, L3: 0x97)
                sel_uid[0] = sel_all[0] = 0x93 + cascade_level * 2;
 
+               if (anticollision) {
                // SELECT_ALL
                ReaderTransmit(sel_all, sizeof(sel_all), NULL);
                if (!ReaderReceive(resp, resp_par)) return 0;
                // SELECT_ALL
                ReaderTransmit(sel_all, sizeof(sel_all), NULL);
                if (!ReaderReceive(resp, resp_par)) return 0;
@@ -1968,6 +1977,14 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u
                } else {                // no collision, use the response to SELECT_ALL as current uid
                        memcpy(uid_resp, resp, 4);
                }
                } else {                // no collision, use the response to SELECT_ALL as current uid
                        memcpy(uid_resp, resp, 4);
                }
+               } else {
+                       if (cascade_level < num_cascades - 1) {
+                               uid_resp[0] = 0x88;
+                               memcpy(uid_resp+1, uid_ptr+cascade_level*3, 3);
+                       } else {
+                               memcpy(uid_resp, uid_ptr+cascade_level*3, 4);
+                       }
+               }
                uid_resp_len = 4;
 
                // calculate crypto UID. Always use last 4 Bytes.
                uid_resp_len = 4;
 
                // calculate crypto UID. Always use last 4 Bytes.
@@ -1977,7 +1994,7 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u
 
                // Construct SELECT UID command
                sel_uid[1] = 0x70;                                                                                                      // transmitting a full UID (1 Byte cmd, 1 Byte NVB, 4 Byte UID, 1 Byte BCC, 2 Bytes CRC)
 
                // Construct SELECT UID command
                sel_uid[1] = 0x70;                                                                                                      // transmitting a full UID (1 Byte cmd, 1 Byte NVB, 4 Byte UID, 1 Byte BCC, 2 Bytes CRC)
-               memcpy(sel_uid+2, uid_resp, 4);                                                                         // the UID
+               memcpy(sel_uid+2, uid_resp, 4);                                                                         // the UID received during anticollision, or the provided UID
                sel_uid[6] = sel_uid[2] ^ sel_uid[3] ^ sel_uid[4] ^ sel_uid[5];         // calculate and add BCC
                AppendCrc14443a(sel_uid, 7);                                                                            // calculate and add CRC
                ReaderTransmit(sel_uid, sizeof(sel_uid), NULL);
                sel_uid[6] = sel_uid[2] ^ sel_uid[3] ^ sel_uid[4] ^ sel_uid[5];         // calculate and add BCC
                AppendCrc14443a(sel_uid, 7);                                                                            // calculate and add CRC
                ReaderTransmit(sel_uid, sizeof(sel_uid), NULL);
@@ -1993,11 +2010,10 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u
                        uid_resp[0] = uid_resp[1];
                        uid_resp[1] = uid_resp[2];
                        uid_resp[2] = uid_resp[3]; 
                        uid_resp[0] = uid_resp[1];
                        uid_resp[1] = uid_resp[2];
                        uid_resp[2] = uid_resp[3]; 
-
                        uid_resp_len = 3;
                }
 
                        uid_resp_len = 3;
                }
 
-               if(uid_ptr) {
+               if(uid_ptr && anticollision) {
                        memcpy(uid_ptr + (cascade_level*3), uid_resp, uid_resp_len);
                }
 
                        memcpy(uid_ptr + (cascade_level*3), uid_resp, uid_resp_len);
                }
 
@@ -2118,7 +2134,7 @@ void ReaderIso14443a(UsbCommand *c)
                iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
                if(!(param & ISO14A_NO_SELECT)) {
                        iso14a_card_select_t *card = (iso14a_card_select_t*)buf;
                iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
                if(!(param & ISO14A_NO_SELECT)) {
                        iso14a_card_select_t *card = (iso14a_card_select_t*)buf;
-                       arg0 = iso14443a_select_card(NULL,card,NULL);
+                       arg0 = iso14443a_select_card(NULL,card,NULL, true, 0);
                        cmd_send(CMD_ACK,arg0,card->uidlen,0,buf,sizeof(iso14a_card_select_t));
                }
        }
                        cmd_send(CMD_ACK,arg0,card->uidlen,0,buf,sizeof(iso14a_card_select_t));
                }
        }
@@ -2180,6 +2196,7 @@ void ReaderIso14443a(UsbCommand *c)
        }
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        }
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       set_tracing(FALSE);
        LEDsoff();
 }
 
        LEDsoff();
 }
 
@@ -2221,16 +2238,14 @@ void ReaderMifare(bool first_try)
        uint8_t mf_nr_ar[]   = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
        static uint8_t mf_nr_ar3;
 
        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];
+       uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE] = {0x00};
+       uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE] = {0x00};
 
 
-       if (first_try) { 
+       if (first_try)
                iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
                iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
-       }
        
        // free eventually allocated BigBuf memory. We want all for tracing.
        BigBuf_free();
        
        // free eventually allocated BigBuf memory. We want all for tracing.
        BigBuf_free();
-       
        clear_trace();
        set_tracing(TRUE);
 
        clear_trace();
        set_tracing(TRUE);
 
@@ -2238,7 +2253,7 @@ void ReaderMifare(bool first_try)
        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 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};
+       uint8_t uid[10] = {0};
        uint32_t cuid;
 
        uint32_t nt = 0;
        uint32_t cuid;
 
        uint32_t nt = 0;
@@ -2247,11 +2262,12 @@ 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);
+       #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;
 
@@ -2260,7 +2276,6 @@ void ReaderMifare(bool first_try)
                sync_time = GetCountSspClk() & 0xfffffff8;
                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;
                sync_time = GetCountSspClk() & 0xfffffff8;
                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 = 0;
                par[0] = 0;
        }
        else {
                par[0] = 0;
        }
        else {
@@ -2275,14 +2290,19 @@ void ReaderMifare(bool first_try)
        LED_C_OFF();
        
 
        LED_C_OFF();
        
 
-       #define MAX_UNEXPECTED_RANDOM   5               // maximum number of unexpected (i.e. real) random numbers when trying to sync. Then give up.
-       #define MAX_SYNC_TRIES                  16
+       #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 unexpected_random = 0;
        uint16_t sync_tries = 0;
        int16_t debug_info_nr = -1;
-       uint32_t debug_info[MAX_SYNC_TRIES];
+       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();
                
                LED_C_ON();
                WDT_HIT();
@@ -2293,24 +2313,59 @@ void ReaderMifare(bool first_try)
                        break;
                }
                
                        break;
                }
                
-               if(!iso14443a_select_card(uid, NULL, &cuid)) {
+               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, true, 0)) {
                        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();
 
 
+               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) {
                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) {
+                               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);
                } else {
                                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);
                } else {
-                       ReaderTransmit(mf_auth, sizeof(mf_auth), NULL);
+                       // 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
                }                       
 
                // Receive the (4 Byte) "random" nonce
@@ -2332,7 +2387,7 @@ void ReaderMifare(bool first_try)
                        } else {
                                if (nt_distance == -99999) { // invalid nonce received
                                        unexpected_random++;
                        } else {
                                if (nt_distance == -99999) { // invalid nonce received
                                        unexpected_random++;
-                                       if (!nt_attacked && unexpected_random > MAX_UNEXPECTED_RANDOM) {
+                                       if (unexpected_random > MAX_UNEXPECTED_RANDOM) {
                                                isOK = -3;              // Card has an unpredictable PRNG. Give up      
                                                break;
                                        } else {
                                                isOK = -3;              // Card has an unpredictable PRNG. Give up      
                                                break;
                                        } else {
@@ -2340,20 +2395,25 @@ void ReaderMifare(bool first_try)
                                        }
                                }
                                if (++sync_tries > MAX_SYNC_TRIES) {
                                        }
                                }
                                if (++sync_tries > MAX_SYNC_TRIES) {
-                                       if (sync_tries > 2 * 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
                                                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[++debug_info_nr] = nt_distance;
+                                               debug_info[strategy][debug_info_nr] = nt_distance;
+                                               debug_info_nr++;
+                                               if (debug_info_nr == NUM_DEBUG_INFOS) {
+                                                       strategy++;
+                                                       debug_info_nr = 0;
+                                               }
                                                continue;
                                        }
                                }
                                                continue;
                                        }
                                }
-                               sync_cycles = (sync_cycles - nt_distance);
+                               sync_cycles = (sync_cycles - nt_distance/elapsed_prng_sequences);
                                if (sync_cycles <= 0) {
                                        sync_cycles += PRNG_SEQUENCE_LENGTH;
                                }
                                if (MF_DBGLEVEL >= 3) {
                                if (sync_cycles <= 0) {
                                        sync_cycles += PRNG_SEQUENCE_LENGTH;
                                }
                                if (MF_DBGLEVEL >= 3) {
-                                       Dbprintf("calibrating in cycle %d. nt_distance=%d, Sync_cycles: %d\n", i, nt_distance, sync_cycles);
+                                       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);
                                }
                                continue;
                        }
                                }
                                continue;
                        }
@@ -2365,6 +2425,7 @@ void ReaderMifare(bool first_try)
                                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++;
                        }
@@ -2378,6 +2439,9 @@ 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;
                }
@@ -2385,14 +2449,11 @@ 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
        
                        if (nt_diff == 0)
                        catch_up_cycles = 8;    // the PRNG is delayed by 8 cycles due to the NAC (4Bits = 0x05 encrypted) transfer
        
                        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
-                       }
 
                        led_on = !led_on;
                        if(led_on) LED_B_ON(); else LED_B_OFF();
 
                        led_on = !led_on;
                        if(led_on) LED_B_ON(); else LED_B_OFF();
@@ -2410,8 +2471,7 @@ void ReaderMifare(bool first_try)
                        mf_nr_ar[3] = (mf_nr_ar[3] & 0x1F) | (nt_diff << 5);
                        par[0] = par_low;
                } else {
                        mf_nr_ar[3] = (mf_nr_ar[3] & 0x1F) | (nt_diff << 5);
                        par[0] = par_low;
                } else {
-                       if (nt_diff == 0 && first_try)
-                       {
+                       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;
                                par[0]++;
                                if (par[0] == 0x00) {           // tried all 256 possible parities without success. Card doesn't send NACK.
                                        isOK = -2;
@@ -2428,13 +2488,15 @@ void ReaderMifare(bool first_try)
        
        if (isOK == -4) {
                if (MF_DBGLEVEL >= 3) {
        
        if (isOK == -4) {
                if (MF_DBGLEVEL >= 3) {
-                       for(uint16_t i = 0; i < MAX_SYNC_TRIES; i++) {
-                               Dbprintf("collected debug info[%d] = %d\n", i, debug_info[i]);
+                       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];
+       byte_t buf[28] = {0x00};
        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);
@@ -2490,14 +2552,15 @@ 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 rSAK1[] = {0x04, 0xda, 0x17};
 
-       uint8_t rAUTH_NT[] = {0x01, 0x01, 0x01, 0x01};
+       //uint8_t rAUTH_NT[] = {0x01, 0x01, 0x01, 0x01};
+       uint8_t rAUTH_NT[] = {0x55, 0x41, 0x49, 0x92};
        uint8_t rAUTH_AT[] = {0x00, 0x00, 0x00, 0x00};
                
        uint8_t rAUTH_AT[] = {0x00, 0x00, 0x00, 0x00};
                
-       //Here, we collect UID,NT,AR,NR,UID2,NT2,AR2,NR2
+       //Here, we collect UID1,UID2,NT,AR,NR,0,0,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};
        // 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};
@@ -2572,7 +2635,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
 
 
        bool finished = FALSE;
 
 
        bool finished = FALSE;
-       while (!BUTTON_PRESS() && !finished) {
+       while (!BUTTON_PRESS() && !finished && !usb_poll_validate_length()) {
                WDT_HIT();
 
                // find reader field
                WDT_HIT();
 
                // find reader field
@@ -2645,8 +2708,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                                break;
                        }
                        case MFEMUL_AUTH1:{
                                break;
                        }
                        case MFEMUL_AUTH1:{
-                               if( len != 8)
-                               {
+                               if( len != 8) {
                                        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;
@@ -2657,9 +2719,9 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
 
                                //Collect AR/NR
                                //if(ar_nr_collected < 2 && cardAUTHSC == 2){
 
                                //Collect AR/NR
                                //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. 
+                               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*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]   = 0;
                                                //ar_nr_responses[ar_nr_collected*5+1] = 0;
                                                ar_nr_responses[ar_nr_collected*5+2] = nonce;
@@ -2669,9 +2731,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                                        }                                               
                                        // Interactive mode flag, means we need to send ACK
                                        if(flags & FLAG_INTERACTIVE && ar_nr_collected == 2)
                                        }                                               
                                        // Interactive mode flag, means we need to send ACK
                                        if(flags & FLAG_INTERACTIVE && ar_nr_collected == 2)
-                                       {
                                                finished = true;
                                                finished = true;
-                                       }
                                }
 
                                // --- crypto
                                }
 
                                // --- crypto
@@ -2700,9 +2760,13 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                                EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
                                LED_C_ON();
                                cardSTATE = MFEMUL_WORK;
                                EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
                                LED_C_ON();
                                cardSTATE = MFEMUL_WORK;
-                               if (MF_DBGLEVEL >= 4)   Dbprintf("AUTH COMPLETED for sector %d with key %c. time=%d", 
-                                       cardAUTHSC, cardAUTHKEY == 0 ? 'A' : 'B',
-                                       GetTickCount() - authTimer);
+                               if (MF_DBGLEVEL >= 4) {
+                                       Dbprintf("AUTH COMPLETED for sector %d with key %c. time=%d", 
+                                               cardAUTHSC, 
+                                               cardAUTHKEY == 0 ? 'A' : 'B',
+                                               GetTickCount() - authTimer
+                                       );
+                               }
                                break;
                        }
                        case MFEMUL_SELECT2:{
                                break;
                        }
                        case MFEMUL_SELECT2:{
@@ -2717,7 +2781,9 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
 
                                // select 2 card
                                if (len == 9 && 
 
                                // select 2 card
                                if (len == 9 && 
-                                               (receivedCmd[0] == 0x95 && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], rUIDBCC2, 4) == 0)) {
+                                               (receivedCmd[0] == 0x95 &&
+                                                receivedCmd[1] == 0x70 && 
+                                                memcmp(&receivedCmd[2], rUIDBCC2, 4) == 0) ) {
                                        EmSendCmd(rSAK, sizeof(rSAK));
                                        cuid = bytes_to_num(rUIDBCC2, 4);
                                        cardSTATE = MFEMUL_WORK;
                                        EmSendCmd(rSAK, sizeof(rSAK));
                                        cuid = bytes_to_num(rUIDBCC2, 4);
                                        cardSTATE = MFEMUL_WORK;
@@ -2744,10 +2810,9 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                                
                                bool encrypted_data = (cardAUTHKEY != 0xFF) ;
 
                                
                                bool encrypted_data = (cardAUTHKEY != 0xFF) ;
 
-                               if(encrypted_data) {
-                                       // decrypt seqence
+                               // decrypt seqence
+                               if(encrypted_data)
                                        mf_crypto1_decrypt(pcs, receivedCmd, len);
                                        mf_crypto1_decrypt(pcs, receivedCmd, len);
-                               }
                                
                                if (len == 4 && (receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61)) {
                                        authTimer = GetTickCount();
                                
                                if (len == 4 && (receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61)) {
                                        authTimer = GetTickCount();
@@ -2811,9 +2876,8 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                                }
                                // read block
                                if (receivedCmd[0] == 0x30) {
                                }
                                // read block
                                if (receivedCmd[0] == 0x30) {
-                                       if (MF_DBGLEVEL >= 4) {
-                                               Dbprintf("Reader reading block %d (0x%02x)",receivedCmd[1],receivedCmd[1]);
-                                       }
+                                       if (MF_DBGLEVEL >= 4) Dbprintf("Reader reading block %d (0x%02x)",receivedCmd[1],receivedCmd[1]);
+
                                        emlGetMem(response, receivedCmd[1], 1);
                                        AppendCrc14443a(response, 16);
                                        mf_crypto1_encrypt(pcs, response, 18, response_par);
                                        emlGetMem(response, receivedCmd[1], 1);
                                        AppendCrc14443a(response, 16);
                                        mf_crypto1_encrypt(pcs, response, 18, response_par);
@@ -2880,7 +2944,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                                break;
                        }
                        case MFEMUL_WRITEBL2:{
                                break;
                        }
                        case MFEMUL_WRITEBL2:{
-                               if (len == 18){
+                               if (len == 18) {
                                        mf_crypto1_decrypt(pcs, receivedCmd, len);
                                        emlSetMem(receivedCmd, cardWRBL, 1);
                                        EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
                                        mf_crypto1_decrypt(pcs, receivedCmd, len);
                                        emlSetMem(receivedCmd, cardWRBL, 1);
                                        EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
@@ -2969,7 +3033,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                } 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 ) {
-                               Dbprintf("Only got these: UID=%07x%08x, nonce=%08x, AR1=%08x, NR1=%08x",
+                               Dbprintf("Only got these: UID=%06x%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[0], // UID1
                                                ar_nr_responses[1], // UID2
                                                ar_nr_responses[2], // NT
@@ -2980,6 +3044,8 @@ 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);
 }
 
 
 }
 
 
@@ -3001,11 +3067,11 @@ void RAMFUNC SniffMifare(uint8_t param) {
        // The command (reader -> tag) that we're receiving.
        // The length of a received command will in most cases be no more than 18 bytes.
        // So 32 should be enough!
        // The command (reader -> tag) that we're receiving.
        // The length of a received command will in most cases be no more than 18 bytes.
        // So 32 should be enough!
-       uint8_t receivedCmd[MAX_MIFARE_FRAME_SIZE];
-       uint8_t receivedCmdPar[MAX_MIFARE_PARITY_SIZE];
+       uint8_t receivedCmd[MAX_MIFARE_FRAME_SIZE] = {0x00};
+       uint8_t receivedCmdPar[MAX_MIFARE_PARITY_SIZE] = {0x00};
        // The response (tag -> reader) that we're receiving.
        // The response (tag -> reader) that we're receiving.
-       uint8_t receivedResponse[MAX_MIFARE_FRAME_SIZE];
-       uint8_t receivedResponsePar[MAX_MIFARE_PARITY_SIZE];
+       uint8_t receivedResponse[MAX_MIFARE_FRAME_SIZE] = {0x00};
+       uint8_t receivedResponsePar[MAX_MIFARE_PARITY_SIZE] = {0x00};
 
        iso14443a_setup(FPGA_HF_ISO14443A_SNIFFER);
 
 
        iso14443a_setup(FPGA_HF_ISO14443A_SNIFFER);
 
@@ -3061,11 +3127,12 @@ void RAMFUNC SniffMifare(uint8_t param) {
                
                int register readBufDataP = data - dmaBuf;      // number of bytes we have processed so far
                int register dmaBufDataP = DMA_BUFFER_SIZE - AT91C_BASE_PDC_SSC->PDC_RCR; // number of bytes already transferred
                
                int register readBufDataP = data - dmaBuf;      // number of bytes we have processed so far
                int register dmaBufDataP = DMA_BUFFER_SIZE - AT91C_BASE_PDC_SSC->PDC_RCR; // number of bytes already transferred
-               if (readBufDataP <= dmaBufDataP){                       // we are processing the same block of data which is currently being transferred
+
+               if (readBufDataP <= dmaBufDataP)                        // we are processing the same block of data which is currently being transferred
                        dataLen = dmaBufDataP - readBufDataP;   // number of bytes still to be processed
                        dataLen = dmaBufDataP - readBufDataP;   // number of bytes still to be processed
-               } else {                                                                        
+               else
                        dataLen = DMA_BUFFER_SIZE - readBufDataP + dmaBufDataP; // number of bytes still to be processed
                        dataLen = DMA_BUFFER_SIZE - readBufDataP + dmaBufDataP; // number of bytes still to be processed
-               }
+
                // test for length of buffer
                if(dataLen > maxDataLen) {                                      // we are more behind than ever...
                        maxDataLen = dataLen;                                   
                // test for length of buffer
                if(dataLen > maxDataLen) {                                      // we are more behind than ever...
                        maxDataLen = dataLen;                                   
@@ -3092,14 +3159,16 @@ void RAMFUNC SniffMifare(uint8_t param) {
                
                if (sniffCounter & 0x01) {
 
                
                if (sniffCounter & 0x01) {
 
-                       if(!TagIsActive) {              // no need to try decoding tag data if the reader is sending
+                       // no need to try decoding tag data if the reader is sending
+                       if(!TagIsActive) {              
                                uint8_t readerdata = (previous_data & 0xF0) | (*data >> 4);
                                if(MillerDecoding(readerdata, (sniffCounter-1)*4)) {
                                        LED_C_INV();
                                uint8_t readerdata = (previous_data & 0xF0) | (*data >> 4);
                                if(MillerDecoding(readerdata, (sniffCounter-1)*4)) {
                                        LED_C_INV();
+
                                        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. */
-                                       UartReset();
+                                       UartInit(receivedCmd, receivedCmdPar);
                                        
                                        /* And also reset the demod code */
                                        DemodReset();
                                        
                                        /* And also reset the demod code */
                                        DemodReset();
@@ -3107,7 +3176,8 @@ void RAMFUNC SniffMifare(uint8_t param) {
                                ReaderIsActive = (Uart.state != STATE_UNSYNCD);
                        }
                        
                                ReaderIsActive = (Uart.state != STATE_UNSYNCD);
                        }
                        
-                       if(!ReaderIsActive) {           // no need to try decoding tag data if the reader is sending
+                       // no need to try decoding tag data if the reader is sending
+                       if(!ReaderIsActive) {           
                                uint8_t tagdata = (previous_data << 4) | (*data & 0x0F);
                                if(ManchesterDecoding(tagdata, 0, (sniffCounter-1)*4)) {
                                        LED_C_INV();
                                uint8_t tagdata = (previous_data << 4) | (*data & 0x0F);
                                if(ManchesterDecoding(tagdata, 0, (sniffCounter-1)*4)) {
                                        LED_C_INV();
@@ -3116,10 +3186,9 @@ void RAMFUNC SniffMifare(uint8_t param) {
 
                                        // And ready to receive another response.
                                        DemodReset();
 
                                        // And ready to receive another response.
                                        DemodReset();
-
+                                       
                                        // 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);
                        }
@@ -3128,9 +3197,9 @@ void RAMFUNC SniffMifare(uint8_t param) {
                previous_data = *data;
                sniffCounter++;
                data++;
                previous_data = *data;
                sniffCounter++;
                data++;
-               if(data == dmaBuf + DMA_BUFFER_SIZE) {
+
+               if(data == dmaBuf + DMA_BUFFER_SIZE)
                        data = dmaBuf;
                        data = dmaBuf;
-               }
 
        } // main cycle
 
 
        } // main cycle
 
@@ -3138,4 +3207,5 @@ void RAMFUNC SniffMifare(uint8_t param) {
        MfSniffEnd();
        LEDsoff();
        Dbprintf("maxDataLen=%x, Uart.state=%x, Uart.len=%x", maxDataLen, Uart.state, Uart.len);
        MfSniffEnd();
        LEDsoff();
        Dbprintf("maxDataLen=%x, Uart.state=%x, Uart.len=%x", maxDataLen, Uart.state, Uart.len);
+       set_tracing(FALSE);
 }
 }
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