FIX; the "L" optional parameter for swapping endianess on used authentication key...

[proxmark3-svn] / armsrc / iso14443a.c

diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c
index f2fa1ff29e3e766ad1581dfaca5304cecb088689..c6628c07470aecfe862620fc9239fd13b6b94838 100644 (file)
--- a/armsrc/iso14443a.c
+++ b/armsrc/iso14443a.c
@@ -15,7 +15,6 @@
 #include "util.h"
 #include "string.h"
 #include "cmd.h"
 #include "util.h"
 #include "string.h"
 #include "cmd.h"

-

 #include "iso14443crc.h"
 #include "iso14443a.h"
 #include "crapto1.h"
 #include "iso14443crc.h"
 #include "iso14443a.h"
 #include "crapto1.h"


@@ -213,6 +212,12 @@ void AppendCrc14443a(uint8_t* data, int len)
        ComputeCrc14443(CRC_14443_A,data,len,data+len,data+len+1);
 }
 
        ComputeCrc14443(CRC_14443_A,data,len,data+len,data+len+1);
 }
 

+void AppendCrc14443b(uint8_t* data, int len)
+{
+       ComputeCrc14443(CRC_14443_B,data,len,data+len,data+len+1);
+}
+
+

 //=============================================================================
 // ISO 14443 Type A - Miller decoder
 //=============================================================================
 //=============================================================================
 // ISO 14443 Type A - Miller decoder
 //=============================================================================


@@ -232,13 +237,17 @@ void AppendCrc14443a(uint8_t* data, int len)
 static tUart Uart;
 
 // Lookup-Table to decide if 4 raw bits are a modulation.
 static tUart Uart;
 
 // Lookup-Table to decide if 4 raw bits are a modulation.

-// We accept two or three consecutive "0" in any position with the rest "1"
+// We accept the following:
+// 0001  -   a 3 tick wide pause
+// 0011  -   a 2 tick wide pause, or a three tick wide pause shifted left
+// 0111  -   a 2 tick wide pause shifted left
+// 1001  -   a 2 tick wide pause shifted right

 const bool Mod_Miller_LUT[] = {
 const bool Mod_Miller_LUT[] = {

-       TRUE,  TRUE,  FALSE, TRUE,  FALSE, FALSE, FALSE, FALSE,
-       TRUE,  TRUE,  FALSE, FALSE, TRUE,  FALSE, FALSE, FALSE
+       FALSE,  TRUE, FALSE, TRUE,  FALSE, FALSE, FALSE, TRUE,
+       FALSE,  TRUE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE

 };
 };

-#define IsMillerModulationNibble1(b) (Mod_Miller_LUT[(b & 0x00F0) >> 4])
-#define IsMillerModulationNibble2(b) (Mod_Miller_LUT[(b & 0x000F)])
+#define IsMillerModulationNibble1(b) (Mod_Miller_LUT[(b & 0x000000F0) >> 4])
+#define IsMillerModulationNibble2(b) (Mod_Miller_LUT[(b & 0x0000000F)])

 
 void UartReset()
 {
 
 void UartReset()
 {


@@ -248,16 +257,19 @@ void UartReset()
        Uart.parityLen = 0;                                     // number of decoded parity bytes
        Uart.shiftReg = 0;                                      // shiftreg to hold decoded data bits
        Uart.parityBits = 0;                            // holds 8 parity bits
        Uart.parityLen = 0;                                     // number of decoded parity bytes
        Uart.shiftReg = 0;                                      // shiftreg to hold decoded data bits
        Uart.parityBits = 0;                            // holds 8 parity bits

-       Uart.twoBits = 0x0000;                          // buffer for 2 Bits
-       Uart.highCnt = 0;

        Uart.startTime = 0;
        Uart.endTime = 0;
        Uart.startTime = 0;
        Uart.endTime = 0;

+       
+       Uart.byteCntMax = 0;
+       Uart.posCnt = 0;
+       Uart.syncBit = 9999;

 }
 
 void UartInit(uint8_t *data, uint8_t *parity)
 {
        Uart.output = data;
        Uart.parity = parity;
 }
 
 void UartInit(uint8_t *data, uint8_t *parity)
 {
        Uart.output = data;
        Uart.parity = parity;

+       Uart.fourBits = 0x00000000;                     // clear the buffer for 4 Bits

        UartReset();
 }
 
        UartReset();
 }
 


@@ -265,40 +277,44 @@ void UartInit(uint8_t *data, uint8_t *parity)
 static RAMFUNC bool MillerDecoding(uint8_t bit, uint32_t non_real_time)
 {
 
 static RAMFUNC bool MillerDecoding(uint8_t bit, uint32_t non_real_time)
 {
 

-       Uart.twoBits = (Uart.twoBits << 8) | bit;
+       Uart.fourBits = (Uart.fourBits << 8) | bit;

        
        if (Uart.state == STATE_UNSYNCD) {                                                                                      // not yet synced
        
        
        if (Uart.state == STATE_UNSYNCD) {                                                                                      // not yet synced
        

-               if (Uart.highCnt < 2) {                                                                                                 // wait for a stable unmodulated signal
-                       if (Uart.twoBits == 0xffff) {
-                               Uart.highCnt++;
-                       } else {
-                               Uart.highCnt = 0;
-                       }
-               } else {        
-                       Uart.syncBit = 0xFFFF;                                                                                          // not set
-                                                                                                                                                               // we look for a ...1111111100x11111xxxxxx pattern (the start bit)
-                       if              ((Uart.twoBits & 0xDF00) == 0x1F00) Uart.syncBit = 8;           // mask is   11x11111 xxxxxxxx, 
-                                                                                                                                                               // check for 00x11111 xxxxxxxx
-                       else if ((Uart.twoBits & 0xEF80) == 0x8F80) Uart.syncBit = 7;           // both masks shifted right one bit, left padded with '1'
-                       else if ((Uart.twoBits & 0xF7C0) == 0xC7C0) Uart.syncBit = 6;           // ...
-                       else if ((Uart.twoBits & 0xFBE0) == 0xE3E0) Uart.syncBit = 5;
-                       else if ((Uart.twoBits & 0xFDF0) == 0xF1F0) Uart.syncBit = 4;
-                       else if ((Uart.twoBits & 0xFEF8) == 0xF8F8) Uart.syncBit = 3;
-                       else if ((Uart.twoBits & 0xFF7C) == 0xFC7C) Uart.syncBit = 2;
-                       else if ((Uart.twoBits & 0xFFBE) == 0xFE3E) Uart.syncBit = 1;
-                       if (Uart.syncBit != 0xFFFF) {                                                                           // found a sync bit
+               Uart.syncBit = 9999;                                                                                                    // not set
+               
+               // 00x11111 2|3 ticks pause followed by 6|5 ticks unmodulated           Sequence Z (a "0" or "start of communication")
+               // 11111111 8 ticks unmodulation                                                                        Sequence Y (a "0" or "end of communication" or "no information")
+               // 111100x1 4 ticks unmodulated followed by 2|3 ticks pause                     Sequence X (a "1")
+
+               // The start bit is one ore more Sequence Y followed by a Sequence Z (... 11111111 00x11111). We need to distinguish from
+               // Sequence X followed by Sequence Y followed by Sequence Z     (111100x1 11111111 00x11111)
+               // we therefore look for a ...xx1111 11111111 00x11111xxxxxx... pattern 
+               // (12 '1's followed by 2 '0's, eventually followed by another '0', followed by 5 '1's)
+               //
+#define ISO14443A_STARTBIT_MASK                0x07FFEF80              // mask is    00001111 11111111 1110 1111 10000000
+#define ISO14443A_STARTBIT_PATTERN     0x07FF8F80              // pattern is 00001111 11111111 1000 1111 10000000
+
+               if              ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 0)) == ISO14443A_STARTBIT_PATTERN >> 0) Uart.syncBit = 7;
+               else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 1)) == ISO14443A_STARTBIT_PATTERN >> 1) Uart.syncBit = 6;
+               else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 2)) == ISO14443A_STARTBIT_PATTERN >> 2) Uart.syncBit = 5;
+               else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 3)) == ISO14443A_STARTBIT_PATTERN >> 3) Uart.syncBit = 4;
+               else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 4)) == ISO14443A_STARTBIT_PATTERN >> 4) Uart.syncBit = 3;
+               else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 5)) == ISO14443A_STARTBIT_PATTERN >> 5) Uart.syncBit = 2;
+               else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 6)) == ISO14443A_STARTBIT_PATTERN >> 6) Uart.syncBit = 1;
+               else if ((Uart.fourBits & (ISO14443A_STARTBIT_MASK >> 7)) == ISO14443A_STARTBIT_PATTERN >> 7) Uart.syncBit = 0;
+
+               if (Uart.syncBit != 9999) {                                                                                             // found a sync bit

                                Uart.startTime = non_real_time?non_real_time:(GetCountSspClk() & 0xfffffff8);
                                Uart.startTime -= Uart.syncBit;
                                Uart.endTime = Uart.startTime;
                                Uart.state = STATE_START_OF_COMMUNICATION;
                        }
                                Uart.startTime = non_real_time?non_real_time:(GetCountSspClk() & 0xfffffff8);
                                Uart.startTime -= Uart.syncBit;
                                Uart.endTime = Uart.startTime;
                                Uart.state = STATE_START_OF_COMMUNICATION;
                        }

-               }

 
        } else {
 
 
        } else {
 

-               if (IsMillerModulationNibble1(Uart.twoBits >> Uart.syncBit)) {                  
-                       if (IsMillerModulationNibble2(Uart.twoBits >> Uart.syncBit)) {          // Modulation in both halves - error
+               if (IsMillerModulationNibble1(Uart.fourBits >> Uart.syncBit)) {                 
+                       if (IsMillerModulationNibble2(Uart.fourBits >> Uart.syncBit)) {         // Modulation in both halves - error

                                UartReset();
                        } else {                                                                                                                        // Modulation in first half = Sequence Z = logic "0"
                                if (Uart.state == STATE_MILLER_X) {                                                             // error - must not follow after X
                                UartReset();
                        } else {                                                                                                                        // Modulation in first half = Sequence Z = logic "0"
                                if (Uart.state == STATE_MILLER_X) {                                                             // error - must not follow after X


@@ -322,7 +338,7 @@ static RAMFUNC bool MillerDecoding(uint8_t bit, uint32_t non_real_time)
                                }
                        }
                } else {
                                }
                        }
                } else {

-                       if (IsMillerModulationNibble2(Uart.twoBits >> Uart.syncBit)) {          // Modulation second half = Sequence X = logic "1"
+                       if (IsMillerModulationNibble2(Uart.fourBits >> Uart.syncBit)) {         // Modulation second half = Sequence X = logic "1"

                                Uart.bitCount++;
                                Uart.shiftReg = (Uart.shiftReg >> 1) | 0x100;                                   // add a 1 to the shiftreg
                                Uart.state = STATE_MILLER_X;
                                Uart.bitCount++;
                                Uart.shiftReg = (Uart.shiftReg >> 1) | 0x100;                                   // add a 1 to the shiftreg
                                Uart.state = STATE_MILLER_X;


@@ -358,12 +374,10 @@ static RAMFUNC bool MillerDecoding(uint8_t bit, uint32_t non_real_time)
                                                return TRUE;                                                                                    // we are finished with decoding the raw data sequence
                                        } else {
                                                UartReset();                                                                                    // Nothing received - start over
                                                return TRUE;                                                                                    // we are finished with decoding the raw data sequence
                                        } else {
                                                UartReset();                                                                                    // Nothing received - start over

-                                               Uart.highCnt = 1;

                                        }
                                }
                                if (Uart.state == STATE_START_OF_COMMUNICATION) {                               // error - must not follow directly after SOC
                                        UartReset();
                                        }
                                }
                                if (Uart.state == STATE_START_OF_COMMUNICATION) {                               // error - must not follow directly after SOC
                                        UartReset();

-                                       Uart.highCnt = 1;

                                } else {                                                                                                                // a logic "0"
                                        Uart.bitCount++;
                                        Uart.shiftReg = (Uart.shiftReg >> 1);                                           // add a 0 to the shiftreg
                                } else {                                                                                                                // a logic "0"
                                        Uart.bitCount++;
                                        Uart.shiftReg = (Uart.shiftReg >> 1);                                           // add a 0 to the shiftreg


@@ -430,6 +444,11 @@ void DemodReset()
        Demod.highCnt = 0;
        Demod.startTime = 0;
        Demod.endTime = 0;
        Demod.highCnt = 0;
        Demod.startTime = 0;
        Demod.endTime = 0;

+       
+       //
+       Demod.bitCount = 0;
+       Demod.syncBit = 0xFFFF;
+       Demod.samples = 0;

 }
 
 void DemodInit(uint8_t *data, uint8_t *parity)
 }
 
 void DemodInit(uint8_t *data, uint8_t *parity)


@@ -528,9 +547,7 @@ static RAMFUNC int ManchesterDecoding(uint8_t bit, uint16_t offset, uint32_t non
                                }
                        }
                }
                                }
                        }
                }

-                       

        } 
        } 

-

     return FALSE;      // not finished yet, need more data
 }
 
     return FALSE;      // not finished yet, need more data
 }
 


@@ -544,7 +561,7 @@ static RAMFUNC int ManchesterDecoding(uint8_t bit, uint16_t offset, uint32_t non
 // triggering so that we start recording at the point that the tag is moved
 // near the reader.
 //-----------------------------------------------------------------------------
 // triggering so that we start recording at the point that the tag is moved
 // near the reader.
 //-----------------------------------------------------------------------------

-void RAMFUNC SnoopIso14443a(uint8_t param) {
+void RAMFUNC SniffIso14443a(uint8_t param) {

        // param:
        // bit 0 - trigger from first card answer
        // bit 1 - trigger from first reader 7-bit request
        // param:
        // bit 0 - trigger from first card answer
        // bit 1 - trigger from first reader 7-bit request


@@ -680,6 +697,9 @@ void RAMFUNC SnoopIso14443a(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);
+

                                        LED_C_OFF();
                                } 
                                TagIsActive = (Demod.state != DEMOD_UNSYNCD);
                                        LED_C_OFF();
                                } 
                                TagIsActive = (Demod.state != DEMOD_UNSYNCD);


@@ -915,8 +935,15 @@ 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 uid_1st, int uid_2nd, byte_t* data)
+void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, 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...
+       uint32_t ar_nr_responses[] = {0,0,0,0,0,0,0,0,0,0};
+       uint8_t ar_nr_collected = 0;
+       

        uint8_t sak;
 
        // The first response contains the ATQA (note: bytes are transmitted in reverse order).
        uint8_t sak;
 
        // The first response contains the ATQA (note: bytes are transmitted in reverse order).


@@ -952,7 +979,13 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
                        response1[0] = 0x01;
                        response1[1] = 0x0f;
                        sak = 0x01;
                        response1[0] = 0x01;
                        response1[1] = 0x0f;
                        sak = 0x01;

-               } break;                
+               } break;
+               case 6: { // MIFARE Mini
+                       // Says: I am a Mifare Mini, 320b
+                       response1[0] = 0x44;
+                       response1[1] = 0x00;
+                       sak = 0x09;
+               } break;

                default: {
                        Dbprintf("Error: unkown tagtype (%d)",tagType);
                        return;
                default: {
                        Dbprintf("Error: unkown tagtype (%d)",tagType);
                        return;


@@ -965,17 +998,24 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
        // Check if the uid uses the (optional) part
        uint8_t response2a[5] = {0x00};
        
        // Check if the uid uses the (optional) part
        uint8_t response2a[5] = {0x00};
        

-       if (uid_2nd) {
+       if (flags & FLAG_7B_UID_IN_DATA) {

                response2[0] = 0x88;
                response2[0] = 0x88;

-               num_to_bytes(uid_1st,3,response2+1);
-               num_to_bytes(uid_2nd,4,response2a);
+               response2[1] = data[0];
+               response2[2] = data[1];
+               response2[3] = data[2];
+
+               response2a[0] = data[3];
+               response2a[1] = data[4];
+               response2a[2] = data[5];
+               response2a[3] = data[7];

                response2a[4] = response2a[0] ^ response2a[1] ^ response2a[2] ^ response2a[3];
 
                // Configure the ATQA and SAK accordingly
                response1[0] |= 0x40;
                sak |= 0x04;
        } else {
                response2a[4] = response2a[0] ^ response2a[1] ^ response2a[2] ^ response2a[3];
 
                // Configure the ATQA and SAK accordingly
                response1[0] |= 0x40;
                sak |= 0x04;
        } else {

-               num_to_bytes(uid_1st,4,response2);
+               memcpy(response2, data, 4);
+               //num_to_bytes(uid_1st,4,response2);

                // Configure the ATQA and SAK accordingly
                response1[0] &= 0xBF;
                sak &= 0xFB;
                // Configure the ATQA and SAK accordingly
                response1[0] &= 0xBF;
                sak &= 0xFB;


@@ -1109,9 +1149,46 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
                        if (tracing) {
                                LogTrace(receivedCmd, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
                        }
                        if (tracing) {
                                LogTrace(receivedCmd, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
                        }

+                       uint32_t nonce = bytes_to_num(response5,4);

                        uint32_t nr = bytes_to_num(receivedCmd,4);
                        uint32_t ar = bytes_to_num(receivedCmd+4,4);
                        uint32_t nr = bytes_to_num(receivedCmd,4);
                        uint32_t ar = bytes_to_num(receivedCmd+4,4);

-                       Dbprintf("Auth attempt {nr}{ar}: %08x %08x",nr,ar);
+                       //Dbprintf("Auth attempt {nonce}{nr}{ar}: %08x %08x %08x", nonce, nr, ar);
+
+                       if(flags & FLAG_NR_AR_ATTACK )
+                       {
+                               if(ar_nr_collected < 2){
+                                       // Avoid duplicates... probably not necessary, nr should vary. 
+                                       //if(ar_nr_responses[3] != nr){                                         
+                                               ar_nr_responses[ar_nr_collected*5]   = 0;
+                                               ar_nr_responses[ar_nr_collected*5+1] = 0;
+                                               ar_nr_responses[ar_nr_collected*5+2] = nonce;
+                                               ar_nr_responses[ar_nr_collected*5+3] = nr;
+                                               ar_nr_responses[ar_nr_collected*5+4] = ar;
+                                               ar_nr_collected++;
+                                       //}
+                               }                       
+
+                               if(ar_nr_collected > 1 ) {
+                               
+                                       if (MF_DBGLEVEL >= 2) {
+                                                       Dbprintf("Collected two pairs of AR/NR which can be used to extract keys from reader:");
+                                                       Dbprintf("../tools/mfkey/mfkey32 %07x%08x %08x %08x %08x %08x %08x",
+                                                               ar_nr_responses[0], // UID1
+                                                               ar_nr_responses[1], // UID2
+                                                               ar_nr_responses[2], // NT
+                                                               ar_nr_responses[3], // AR1
+                                                               ar_nr_responses[4], // NR1
+                                                               ar_nr_responses[8], // AR2
+                                                               ar_nr_responses[9]  // NR2
+                                                       );
+                                       }
+                                       uint8_t len = ar_nr_collected*5*4;
+                                       cmd_send(CMD_ACK,CMD_SIMULATE_MIFARE_CARD,len,0,&ar_nr_responses,len);
+                                       ar_nr_collected = 0;
+                                       memset(ar_nr_responses, 0x00, len);
+                                       Dbprintf("ICE");
+                               }
+                       }

                } 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]) {


@@ -1215,6 +1292,8 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
                }
        }
 
                }
        }
 

+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       

        Dbprintf("%x %x %x", happened, happened2, cmdsRecvd);
        LED_A_OFF();
        BigBuf_free_keep_EM();
        Dbprintf("%x %x %x", happened, happened2, cmdsRecvd);
        LED_A_OFF();
        BigBuf_free_keep_EM();


@@ -1337,7 +1416,7 @@ void CodeIso14443aBitsAsReaderPar(const uint8_t *cmd, uint16_t bits, const uint8
                }
 
                // Only transmit parity bit if we transmitted a complete byte
                }
 
                // Only transmit parity bit if we transmitted a complete byte

-               if (j == 8) {
+               if (j == 8 && parity != NULL) {

                        // Get the parity bit
                        if (parity[i>>3] & (0x80 >> (i&0x0007))) {
                                // Sequence X
                        // Get the parity bit
                        if (parity[i>>3] & (0x80 >> (i&0x0007))) {
                                // Sequence X


@@ -1601,7 +1680,7 @@ bool EmLogTrace(uint8_t *reader_data, uint16_t reader_len, uint32_t reader_Start
 //-----------------------------------------------------------------------------
 static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, uint8_t *receivedResponsePar, uint16_t offset)
 {
 //-----------------------------------------------------------------------------
 static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, uint8_t *receivedResponsePar, uint16_t offset)
 {

-       uint32_t c;
+       uint32_t c = 0x00;

        
        // Set FPGA mode to "reader listen mode", no modulation (listen
        // only, since we are receiving, not transmitting).
        
        // Set FPGA mode to "reader listen mode", no modulation (listen
        // only, since we are receiving, not transmitting).


@@ -1615,7 +1694,6 @@ static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, uint8_t *receive
        // clear RXRDY:
     uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
 
        // clear RXRDY:
     uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
 

-       c = 0;

        for(;;) {
                WDT_HIT();
 
        for(;;) {
                WDT_HIT();
 


@@ -1631,6 +1709,7 @@ 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);


@@ -1646,11 +1725,13 @@ 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


@@ -1659,6 +1740,7 @@ 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


@@ -1719,6 +1801,11 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u
                memset(uid_ptr,0,10);
        }
 
                memset(uid_ptr,0,10);
        }
 

+       // check for proprietary anticollision:
+       if ((resp[0] & 0x1F) == 0) {
+               return 3;
+       }
+       

        // OK we will select at least at cascade 1, lets see if first byte of UID was 0x88 in
        // which case we need to make a cascade 2 request and select - this is a long UID
        // While the UID is not complete, the 3nd bit (from the right) is set in the SAK.
        // OK we will select at least at cascade 1, lets see if first byte of UID was 0x88 in
        // which case we need to make a cascade 2 request and select - this is a long UID
        // While the UID is not complete, the 3nd bit (from the right) is set in the SAK.


@@ -1851,7 +1938,7 @@ void iso14443a_setup(uint8_t fpga_minor_mode) {
        DemodReset();
        UartReset();
        NextTransferTime = 2*DELAY_ARM2AIR_AS_READER;
        DemodReset();
        UartReset();
        NextTransferTime = 2*DELAY_ARM2AIR_AS_READER;

-       iso14a_set_timeout(1050); // 10ms default
+       iso14a_set_timeout(10*106); // 10ms default

 }
 
 int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data) {
 }
 
 int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data) {


@@ -1890,8 +1977,9 @@ void ReaderIso14443a(UsbCommand *c)
 {
        iso14a_command_t param = c->arg[0];
        uint8_t *cmd = c->d.asBytes;
 {
        iso14a_command_t param = c->arg[0];
        uint8_t *cmd = c->d.asBytes;

-       size_t len = c->arg[1];
-       size_t lenbits = c->arg[2];
+       size_t len = c->arg[1] & 0xffff;
+       size_t lenbits = c->arg[1] >> 16;
+       uint32_t timeout = c->arg[2];

        uint32_t arg0 = 0;
        byte_t buf[USB_CMD_DATA_SIZE];
        uint8_t par[MAX_PARITY_SIZE];
        uint32_t arg0 = 0;
        byte_t buf[USB_CMD_DATA_SIZE];
        uint8_t par[MAX_PARITY_SIZE];


@@ -1916,7 +2004,7 @@ void ReaderIso14443a(UsbCommand *c)
        }
 
        if(param & ISO14A_SET_TIMEOUT) {
        }
 
        if(param & ISO14A_SET_TIMEOUT) {

-               iso14a_set_timeout(c->arg[2]);
+               iso14a_set_timeout(timeout);

        }
 
        if(param & ISO14A_APDU) {
        }
 
        if(param & ISO14A_APDU) {


@@ -1926,15 +2014,38 @@ void ReaderIso14443a(UsbCommand *c)
 
        if(param & ISO14A_RAW) {
                if(param & ISO14A_APPEND_CRC) {
 
        if(param & ISO14A_RAW) {
                if(param & ISO14A_APPEND_CRC) {

-                       AppendCrc14443a(cmd,len);
+                       if(param & ISO14A_TOPAZMODE) {
+                               AppendCrc14443b(cmd,len);
+                       } else {
+                               AppendCrc14443a(cmd,len);
+                       }

                        len += 2;
                        if (lenbits) lenbits += 16;
                }
                        len += 2;
                        if (lenbits) lenbits += 16;
                }

-               if(lenbits>0) {
+               if(lenbits>0) {                         // want to send a specific number of bits (e.g. short commands)
+                       if(param & ISO14A_TOPAZMODE) {
+                               int bits_to_send = lenbits;
+                               uint16_t i = 0;
+                               ReaderTransmitBitsPar(&cmd[i++], MIN(bits_to_send, 7), NULL, NULL);             // first byte is always short (7bits) and no parity
+                               bits_to_send -= 7;
+                               while (bits_to_send > 0) {
+                                       ReaderTransmitBitsPar(&cmd[i++], MIN(bits_to_send, 8), NULL, NULL);     // following bytes are 8 bit and no parity
+                                       bits_to_send -= 8;
+                               }
+                       } else {

                        GetParity(cmd, lenbits/8, par);
                        GetParity(cmd, lenbits/8, par);

-                       ReaderTransmitBitsPar(cmd, lenbits, par, NULL);
+                               ReaderTransmitBitsPar(cmd, lenbits, par, NULL);                                                 // bytes are 8 bit with odd parity
+                       }
+               } else {                                        // want to send complete bytes only
+                       if(param & ISO14A_TOPAZMODE) {
+                               uint16_t i = 0;
+                               ReaderTransmitBitsPar(&cmd[i++], 7, NULL, NULL);                                                // first byte: 7 bits, no paritiy
+                               while (i < len) {
+                                       ReaderTransmitBitsPar(&cmd[i++], 8, NULL, NULL);                                        // following bytes: 8 bits, no paritiy
+                               }

                } else {
                } else {

-                       ReaderTransmit(cmd,len, NULL);
+                               ReaderTransmit(cmd,len, NULL);                                                                                  // 8 bits, odd parity
+                       }

                }
                arg0 = ReaderReceive(buf, par);
                cmd_send(CMD_ACK,arg0,0,0,buf,sizeof(buf));
                }
                arg0 = ReaderReceive(buf, par);
                cmd_send(CMD_ACK,arg0,0,0,buf,sizeof(buf));


@@ -1958,13 +2069,11 @@ 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;
 

-       nttmp1 = nt1;
-       nttmp2 = nt2;
+       uint16_t i;
+       uint32_t nttmp1 = nt1;
+       uint32_t nttmp2 = nt2;

        
        for (i = 1; i < 32768; i++) {
                nttmp1 = prng_successor(nttmp1, 1);
        
        for (i = 1; i < 32768; i++) {
                nttmp1 = prng_successor(nttmp1, 1);


@@ -1983,28 +2092,27 @@ int32_t dist_nt(uint32_t nt1, uint32_t nt2) {
 // Cloning MiFare Classic Rail and Building Passes, Anywhere, Anytime"
 // (article by Nicolas T. Courtois, 2009)
 //-----------------------------------------------------------------------------
 // Cloning MiFare Classic Rail and Building Passes, Anywhere, Anytime"
 // (article by Nicolas T. Courtois, 2009)
 //-----------------------------------------------------------------------------

-void ReaderMifare(bool first_try)
-{
-       // Mifare AUTH
-       uint8_t mf_auth[]    = { 0x60,0x00,0xf5,0x7b };
-       uint8_t mf_nr_ar[]   = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
-       static uint8_t mf_nr_ar3;
-
-       uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
-       uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
-
+void ReaderMifare(bool first_try) {

        // free eventually allocated BigBuf memory. We want all for tracing.
        BigBuf_free();
        
        clear_trace();
        set_tracing(TRUE);
 
        // 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]  ={0};
-       uint32_t cuid;
+       uint8_t uid[10] = {0x00};
+       //uint32_t cuid = 0x00;

 
        uint32_t nt = 0;
        uint32_t previous_nt = 0;
 
        uint32_t nt = 0;
        uint32_t previous_nt = 0;


@@ -2012,13 +2120,15 @@ 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};
 

-       static uint32_t sync_time;
-       static uint32_t sync_cycles;
+       static uint32_t sync_time = 0;
+       static uint32_t sync_cycles = 0;

        int catch_up_cycles = 0;
        int last_catch_up = 0;
        uint16_t consecutive_resyncs = 0;
        int isOK = 0;
 
        int catch_up_cycles = 0;
        int last_catch_up = 0;
        uint16_t consecutive_resyncs = 0;
        int isOK = 0;
 

+       int numWrongDistance = 0;
+       

        if (first_try) { 
                mf_nr_ar3 = 0;
                iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
        if (first_try) { 
                mf_nr_ar3 = 0;
                iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);


@@ -2038,20 +2148,22 @@ 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();     

   
        for(uint16_t i = 0; TRUE; i++) {
                
                WDT_HIT();
 
                // Test if the action was cancelled
   
        for(uint16_t i = 0; TRUE; i++) {
                
                WDT_HIT();
 
                // Test if the action was cancelled

-               if(BUTTON_PRESS()) {
+               if(BUTTON_PRESS()) break;
+               
+               if (numWrongDistance > 1000) {
+                       isOK = 0;

                        break;
                }
                
                        break;
                }
                

-               LED_C_ON();
-
-               if(!iso14443a_select_card(uid, NULL, &cuid)) {
+               //if(!iso14443a_select_card(uid, NULL, &cuid)) {
+               if(!iso14443a_select_card(uid, NULL, NULL)) {

                        if (MF_DBGLEVEL >= 1)   Dbprintf("Mifare: Can't select card");
                        continue;
                }
                        if (MF_DBGLEVEL >= 1)   Dbprintf("Mifare: Can't select card");
                        continue;
                }


@@ -2085,9 +2197,14 @@ void ReaderMifare(bool first_try)
                                nt_attacked = nt;
                        }
                        else {
                                nt_attacked = nt;
                        }
                        else {

-                               if (nt_distance == -99999) { // invalid nonce received, try again
+                               
+                               // invalid nonce received, try again
+                               if (nt_distance == -99999) { 
+                                       numWrongDistance++;
+                                       if (MF_DBGLEVEL >= 3) Dbprintf("The two nonces has invalid distance, tag could have good PRNG\n");

                                        continue;
                                }
                                        continue;
                                }

+                               

                                sync_cycles = (sync_cycles - nt_distance);
                                if (MF_DBGLEVEL >= 3) Dbprintf("calibrating in cycle %d. nt_distance=%d, Sync_cycles: %d\n", i, nt_distance, sync_cycles);
                                continue;
                                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;


@@ -2096,7 +2213,7 @@ void ReaderMifare(bool first_try)
 
                if ((nt != nt_attacked) && nt_attacked) {       // we somehow lost sync. Try to catch up again...
                        catch_up_cycles = -dist_nt(nt_attacked, nt);
 
                if ((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;
                        }


@@ -2154,10 +2271,10 @@ void ReaderMifare(bool first_try)
                }
        }
 
                }
        }
 

-

        mf_nr_ar[3] &= 0x1F;
        
        mf_nr_ar[3] &= 0x1F;
        

-       byte_t buf[28];
+       byte_t buf[28] = {0x00};
+       

        memcpy(buf + 0,  uid, 4);
        num_to_bytes(nt, 4, buf + 4);
        memcpy(buf + 8,  par_list, 8);
        memcpy(buf + 0,  uid, 4);
        num_to_bytes(nt, 4, buf + 4);
        memcpy(buf + 8,  par_list, 8);


@@ -2166,14 +2283,13 @@ void ReaderMifare(bool first_try)
                
        cmd_send(CMD_ACK,isOK,0,0,buf,28);
 
                
        cmd_send(CMD_ACK,isOK,0,0,buf,28);
 

-       // Thats it...
+       set_tracing(FALSE);

        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 :


@@ -2269,6 +2385,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
        if (_7BUID) {
                rATQA[0] = 0x44;
                rUIDBCC1[0] = 0x88;
        if (_7BUID) {
                rATQA[0] = 0x44;
                rUIDBCC1[0] = 0x88;

+               rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];

                rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3];
        }
 
                rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3];
        }
 


@@ -2373,7 +2490,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                                uint32_t nr = bytes_to_num(&receivedCmd[4], 4);
 
                                //Collect AR/NR
                                uint32_t nr = bytes_to_num(&receivedCmd[4], 4);
 
                                //Collect AR/NR

-                               if(ar_nr_collected < 2){
+                               if(ar_nr_collected < 2 && cardAUTHSC == 2){

                                        if(ar_nr_responses[2] != ar)
                                        {// Avoid duplicates... probably not necessary, ar should vary. 
                                                ar_nr_responses[ar_nr_collected*4] = cuid;
                                        if(ar_nr_responses[2] != ar)
                                        {// Avoid duplicates... probably not necessary, ar should vary. 
                                                ar_nr_responses[ar_nr_collected*4] = cuid;


@@ -2381,7 +2498,12 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                                                ar_nr_responses[ar_nr_collected*4+2] = ar;
                                                ar_nr_responses[ar_nr_collected*4+3] = nr;
                                                ar_nr_collected++;
                                                ar_nr_responses[ar_nr_collected*4+2] = ar;
                                                ar_nr_responses[ar_nr_collected*4+3] = nr;
                                                ar_nr_collected++;

-                                       }
+                                       }                                               
+                                       // Interactive mode flag, means we need to send ACK
+                                       if(flags & FLAG_INTERACTIVE && ar_nr_collected == 2)
+                                       {
+                                               finished = true;
+                               }

                                }
 
                                // --- crypto
                                }
 
                                // --- crypto


@@ -2528,7 +2650,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                                        mf_crypto1_encrypt(pcs, response, 18, response_par);
                                        EmSendCmdPar(response, 18, response_par);
                                        numReads++;
                                        mf_crypto1_encrypt(pcs, response, 18, response_par);
                                        EmSendCmdPar(response, 18, response_par);
                                        numReads++;

-                                       if(exitAfterNReads > 0 && numReads == exitAfterNReads) {
+                                       if(exitAfterNReads > 0 && numReads >= exitAfterNReads) {

                                                Dbprintf("%d reads done, exiting", numReads);
                                                finished = true;
                                        }
                                                Dbprintf("%d reads done, exiting", numReads);
                                                finished = true;
                                        }


@@ -2648,29 +2770,29 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
        if(flags & FLAG_INTERACTIVE)// Interactive mode flag, means we need to send ACK
        {
                //May just aswell send the collected ar_nr in the response aswell
        if(flags & FLAG_INTERACTIVE)// Interactive mode flag, means we need to send ACK
        {
                //May just aswell send the collected ar_nr in the response aswell

-               cmd_send(CMD_ACK,CMD_SIMULATE_MIFARE_CARD,0,0,&ar_nr_responses,ar_nr_collected*4*4);
+               cmd_send(CMD_ACK,CMD_SIMULATE_MIFARE_CARD,1,0,&ar_nr_responses,ar_nr_collected*4*4);

        }
 
        }
 

-       if(flags & FLAG_NR_AR_ATTACK)
+       if(flags & FLAG_NR_AR_ATTACK && MF_DBGLEVEL >= 1 )

        {
        {

-               if(ar_nr_collected > 1) {
+               if(ar_nr_collected > 1 ) {

                        Dbprintf("Collected two pairs of AR/NR which can be used to extract keys from reader:");
                        Dbprintf("../tools/mfkey/mfkey32 %08x %08x %08x %08x %08x %08x",
                                        ar_nr_responses[0], // UID
                        Dbprintf("Collected two pairs of AR/NR which can be used to extract keys from reader:");
                        Dbprintf("../tools/mfkey/mfkey32 %08x %08x %08x %08x %08x %08x",
                                        ar_nr_responses[0], // UID

-                                       ar_nr_responses[1], //NT
-                                       ar_nr_responses[2], //AR1
-                                       ar_nr_responses[3], //NR1
-                                       ar_nr_responses[6], //AR2
-                                       ar_nr_responses[7] //NR2
+                                       ar_nr_responses[1], // NT
+                                       ar_nr_responses[2], // AR1
+                                       ar_nr_responses[3], // NR1
+                                       ar_nr_responses[6], // AR2
+                                       ar_nr_responses[7]  // NR2

                                        );
                } else {
                        Dbprintf("Failed to obtain two AR/NR pairs!");
                                        );
                } else {
                        Dbprintf("Failed to obtain two AR/NR pairs!");

-                       if(ar_nr_collected >0) {
+                       if(ar_nr_collected > 0 ) {

                                Dbprintf("Only got these: UID=%08x, nonce=%08x, AR1=%08x, NR1=%08x",
                                                ar_nr_responses[0], // UID
                                Dbprintf("Only got these: UID=%08x, nonce=%08x, AR1=%08x, NR1=%08x",
                                                ar_nr_responses[0], // UID

-                                               ar_nr_responses[1], //NT
-                                               ar_nr_responses[2], //AR1
-                                               ar_nr_responses[3] //NR1
+                                               ar_nr_responses[1], // NT
+                                               ar_nr_responses[2], // AR1
+                                               ar_nr_responses[3]  // NR1

                                                );
                        }
                }
                                                );
                        }
                }


@@ -2680,7 +2802,6 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
 }
 
 
 }
 
 

-

 //-----------------------------------------------------------------------------
 // MIFARE sniffer. 
 // 
 //-----------------------------------------------------------------------------
 // MIFARE sniffer. 
 // 


@@ -2690,6 +2811,9 @@ 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


@@ -2705,12 +2829,6 @@ 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];
 

-       // As we receive stuff, we copy it from receivedCmd or receivedResponse
-       // into trace, along with its length and other annotations.
-       //uint8_t *trace = (uint8_t *)BigBuf;
-       
-       // free eventually allocated BigBuf memory
-       BigBuf_free();

        // allocate the DMA buffer, used to stream samples from the FPGA
        uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE);
        uint8_t *data = dmaBuf;
        // allocate the DMA buffer, used to stream samples from the FPGA
        uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE);
        uint8_t *data = dmaBuf;


@@ -2801,7 +2919,7 @@ 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. */

-                                       UartReset();
+                                       UartInit(receivedCmd, receivedCmdPar);

                                        
                                        /* And also reset the demod code */
                                        DemodReset();
                                        
                                        /* And also reset the demod code */
                                        DemodReset();


@@ -2818,6 +2936,9 @@ 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);

                                }
                                TagIsActive = (Demod.state != DEMOD_UNSYNCD);
                        }
                                }
                                TagIsActive = (Demod.state != DEMOD_UNSYNCD);
                        }


@@ -2839,4 +2960,4 @@ void RAMFUNC SniffMifare(uint8_t param) {
        
        Dbprintf("maxDataLen=%x, Uart.state=%x, Uart.len=%x", maxDataLen, Uart.state, Uart.len);
        LEDsoff();
        
        Dbprintf("maxDataLen=%x, Uart.state=%x, Uart.len=%x", maxDataLen, Uart.state, Uart.len);
        LEDsoff();

-}
+}
\ No newline at end of file