CHG: extern methods.

[proxmark3-svn] / armsrc / iso14443a.c

diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c
index ede8501ee73f48b8907ec4d9163e0025a0f96841..1fae4f3c691ca9aa79f771b235396c4624e14203 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


@@ -9,19 +9,7 @@
 //-----------------------------------------------------------------------------
 // Routines to support ISO 14443 type A.
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
 // Routines to support ISO 14443 type A.
 //-----------------------------------------------------------------------------

-
-#include "proxmark3.h"
-#include "apps.h"
-#include "util.h"
-#include "string.h"
-#include "cmd.h"
-#include "iso14443crc.h"

 #include "iso14443a.h"
 #include "iso14443a.h"

-#include "iso14443b.h"
-#include "crapto1.h"
-#include "mifareutil.h"
-#include "BigBuf.h"
-#include "parity.h"

 
 static uint32_t iso14a_timeout;
 int rsamples = 0;
 
 static uint32_t iso14a_timeout;
 int rsamples = 0;


@@ -771,7 +759,7 @@ static void Code4bitAnswerAsTag(uint8_t cmd) {
 // Stop when button is pressed
 // Or return TRUE when command is captured
 //-----------------------------------------------------------------------------
 // Stop when button is pressed
 // Or return TRUE when command is captured
 //-----------------------------------------------------------------------------

-static int GetIso14443aCommandFromReader(uint8_t *received, uint8_t *parity, int *len) {
+int GetIso14443aCommandFromReader(uint8_t *received, uint8_t *parity, int *len) {

     // Set FPGA mode to "simulated ISO 14443 tag", no modulation (listen
     // only, since we are receiving, not transmitting).
     // Signal field is off with the appropriate LED
     // Set FPGA mode to "simulated ISO 14443 tag", no modulation (listen
     // only, since we are receiving, not transmitting).
     // Signal field is off with the appropriate LED


@@ -857,13 +845,14 @@ 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.

+// 'hf 14a sim'

 //-----------------------------------------------------------------------------
 void SimulateIso14443aTag(int tagType, int flags, byte_t* data) {
 
 //-----------------------------------------------------------------------------
 void SimulateIso14443aTag(int tagType, int flags, byte_t* data) {
 

-       //Here, we collect CUID, NT, NR, AR, CUID, NT2, NR2, AR2
-       // This can be used in a reader-only attack.
-       uint32_t ar_nr_responses[] = {0,0,0,0,0,0,0,0,0,0};
-       uint8_t ar_nr_collected = 0;
+       #define ATTACK_KEY_COUNT 8 // keep same as define in cmdhfmf.c -> readerAttack()
+       // init pseudorand
+       fast_prand();
+       

        uint8_t sak = 0;
        uint32_t cuid = 0;                      
        uint32_t nonce = 0;
        uint8_t sak = 0;
        uint32_t cuid = 0;                      
        uint32_t nonce = 0;


@@ -875,6 +864,16 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) {
        
        // The first response contains the ATQA (note: bytes are transmitted in reverse order).
        uint8_t response1[] = {0,0};
        
        // The first response contains the ATQA (note: bytes are transmitted in reverse order).
        uint8_t response1[] = {0,0};

+
+       // Here, we collect CUID, block1, keytype1, NT1, NR1, AR1, CUID, block2, keytyp2, NT2, NR2, AR2
+       // it should also collect block, keytype.
+       uint8_t cardAUTHSC = 0;
+       uint8_t cardAUTHKEY = 0xff;  // no authentication
+       // allow collecting up to 8 sets of nonces to allow recovery of up to 8 keys
+
+       nonces_t ar_nr_nonces[ATTACK_KEY_COUNT]; // for attack types moebius
+       memset(ar_nr_nonces, 0x00, sizeof(ar_nr_nonces));
+       uint8_t moebius_count = 0;

        
        switch (tagType) {
                case 1: { // MIFARE Classic 1k 
        
        switch (tagType) {
                case 1: { // MIFARE Classic 1k 


@@ -915,11 +914,15 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) {
                                uint16_t start = 4 * (0+12);  
                                uint8_t emdata[8];
                                emlGetMemBt( emdata, start, sizeof(emdata));
                                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
+                               memcpy(data, emdata, 3); // uid bytes 0-2
+                               memcpy(data+3, emdata+4, 4); // uid bytes 3-7

                                flags |= FLAG_7B_UID_IN_DATA;
                        }
                                flags |= FLAG_7B_UID_IN_DATA;
                        }

-               } break;                
+               } break;        
+               case 8: { // MIFARE Classic 4k
+                       response1[0] = 0x02;
+                       sak = 0x18;
+               } break;

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


@@ -969,22 +972,21 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) {
        response3a[0] = sak & 0xFB;
        ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]);
 
        response3a[0] = sak & 0xFB;
        ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]);
 

-       uint8_t response5[] = { 0x01, 0x01, 0x01, 0x01 };                               // Very random tag nonce
+       // Tag NONCE.
+       uint8_t response5[4]; 
+       

        uint8_t response6[] = { 0x04, 0x58, 0x80, 0x02, 0x00, 0x00 };   // dummy ATS (pseudo-ATR), answer to RATS: 
        // Format byte = 0x58: FSCI=0x08 (FSC=256), TA(1) and TC(1) present, 
        // TA(1) = 0x80: different divisors not supported, DR = 1, DS = 1
        // TB(1) = not present. Defaults: FWI = 4 (FWT = 256 * 16 * 2^4 * 1/fc = 4833us), SFGI = 0 (SFG = 256 * 16 * 2^0 * 1/fc = 302us)
        // TC(1) = 0x02: CID supported, NAD not supported
        ComputeCrc14443(CRC_14443_A, response6, 4, &response6[4], &response6[5]);
        uint8_t response6[] = { 0x04, 0x58, 0x80, 0x02, 0x00, 0x00 };   // dummy ATS (pseudo-ATR), answer to RATS: 
        // Format byte = 0x58: FSCI=0x08 (FSC=256), TA(1) and TC(1) present, 
        // TA(1) = 0x80: different divisors not supported, DR = 1, DS = 1
        // TB(1) = not present. Defaults: FWI = 4 (FWT = 256 * 16 * 2^4 * 1/fc = 4833us), SFGI = 0 (SFG = 256 * 16 * 2^0 * 1/fc = 302us)
        // TC(1) = 0x02: CID supported, NAD not supported
        ComputeCrc14443(CRC_14443_A, response6, 4, &response6[4], &response6[5]);

-
-       // the randon nonce
-       nonce = bytes_to_num(response5, 4);     

        
        // Prepare GET_VERSION (different for UL 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_NTAG[] = {0x00, 0x04, 0x04, 0x02, 0x01, 0x00, 0x11, 0x03, 0x01, 0x9e}; //NTAG 215   
+       // uint8_t response7_EV1[] = {0x00, 0x04, 0x03, 0x01, 0x01, 0x00, 0x0b, 0x03, 0xfd, 0xf7};  //EV1 48bytes VERSION.
+       // uint8_t response7_NTAG[] = {0x00, 0x04, 0x04, 0x02, 0x01, 0x00, 0x11, 0x03, 0x01, 0x9e}; //NTAG 215  

        // 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] = {


@@ -998,8 +1000,8 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) {
 
                { .response = response8,   .response_n = sizeof(response8) }  // EV1/NTAG PACK response
        };      
 
                { .response = response8,   .response_n = sizeof(response8) }  // EV1/NTAG PACK response
        };      

-               //{ .response = response7_NTAG, .response_n = sizeof(response7_NTAG)}, // EV1/NTAG GET_VERSION 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 = 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


@@ -1050,14 +1052,9 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) {
                
                // Clean receive command buffer
                if(!GetIso14443aCommandFromReader(receivedCmd, receivedCmdPar, &len)) {
                
                // Clean receive command buffer
                if(!GetIso14443aCommandFromReader(receivedCmd, receivedCmdPar, &len)) {

-                       DbpString("Button press");
+                       Dbprintf("Emulator stopped. Tracing: %d  trace length: %d ", tracing, BigBuf_get_traceLen());

                        break;
                        break;

-               }
-               
-               // incease nonce at every command recieved
-               nonce++;
-               num_to_bytes(nonce, 4, response5);
-               
+               }       

                p_response = NULL;
                
                // Okay, look at the command now.
                p_response = NULL;
                
                // Okay, look at the command now.


@@ -1078,45 +1075,49 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) {
                        uint8_t block = receivedCmd[1];
                        // if Ultralight or NTAG (4 byte blocks)
                        if ( tagType == 7 || tagType == 2 ) {
                        uint8_t block = receivedCmd[1];
                        // 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]
+                               // first 12 blocks of emu are [getversion answer - check tearing - pack - 0x00 - signature]

                                uint16_t start = 4 * (block+12);  
                                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);
+                               EmSendCmd(emdata, sizeof(emdata));

                                // We already responded, do not send anything with the EmSendCmd14443aRaw() that is called below
                                p_response = NULL;
                        } else { // all other tags (16 byte block tags)
                                // We already responded, do not send anything with the EmSendCmd14443aRaw() that is called below
                                p_response = NULL;
                        } else { // all other tags (16 byte block tags)

-                               EmSendCmdEx(data+(4*receivedCmd[1]),16,false);
+                               uint8_t emdata[MAX_MIFARE_FRAME_SIZE];
+                               emlGetMemBt( emdata, block, 16);
+                               AppendCrc14443a(emdata, 16);
+                               EmSendCmd(emdata, sizeof(emdata));
+                               // EmSendCmd(data+(4*receivedCmd[1]),16);

                                // 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] == MIFARE_ULEV1_FASTREAD) {    // Received a FAST READ (ranged read)                           
                        uint8_t emdata[MAX_FRAME_SIZE];
                                // 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] == MIFARE_ULEV1_FASTREAD) {    // Received a FAST READ (ranged read)                           
                        uint8_t emdata[MAX_FRAME_SIZE];

-                       //first 12 blocks of emu are [getversion answer - check tearing - pack - 0x00 - signature]
+                       // 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 start =  (receivedCmd[1]+12) * 4; 
                        int len   = (receivedCmd[2] - receivedCmd[1] + 1) * 4;
                        emlGetMemBt( emdata, start, len);
                        AppendCrc14443a(emdata, len);

-                       EmSendCmdEx(emdata, len+2, false);                              
+                       EmSendCmd(emdata, len+2);                               

                        p_response = NULL;              
                } else if(receivedCmd[0] == MIFARE_ULEV1_READSIG && tagType == 7) {     // Received a READ SIGNATURE -- 
                        p_response = NULL;              
                } else if(receivedCmd[0] == MIFARE_ULEV1_READSIG && tagType == 7) {     // Received a READ SIGNATURE -- 

-                       //first 12 blocks of emu are [getversion answer - check tearing - pack - 0x00 - signature]
+                       // 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);
                        uint16_t start = 4 * 4;
                        uint8_t emdata[34];
                        emlGetMemBt( emdata, start, 32);
                        AppendCrc14443a(emdata, 32);

-                       EmSendCmdEx(emdata, sizeof(emdata), false);
+                       EmSendCmd(emdata, sizeof(emdata));

                        p_response = NULL;                                      
                } else if (receivedCmd[0] == MIFARE_ULEV1_READ_CNT && tagType == 7) {   // Received a READ COUNTER -- 
                        uint8_t index = receivedCmd[1];
                        p_response = NULL;                                      
                } else if (receivedCmd[0] == MIFARE_ULEV1_READ_CNT && tagType == 7) {   // Received a READ COUNTER -- 
                        uint8_t index = receivedCmd[1];

-                       uint8_t data[] =  {0x00,0x00,0x00,0x14,0xa5};
+                       uint8_t cmd[] =  {0x00,0x00,0x00,0x14,0xa5};

                        if ( counters[index] > 0) {
                        if ( counters[index] > 0) {

-                               num_to_bytes(counters[index], 3, data);
-                               AppendCrc14443a(data, sizeof(data)-2);
+                               num_to_bytes(counters[index], 3, cmd);
+                               AppendCrc14443a(cmd, sizeof(cmd)-2);

                        }
                        }

-                       EmSendCmdEx(data,sizeof(data),false);                           
+                       EmSendCmd(cmd,sizeof(cmd));                             

                        p_response = NULL;
                } else if (receivedCmd[0] == MIFARE_ULEV1_INCR_CNT && tagType == 7) {   // Received a INC COUNTER -- 
                        // number of counter
                        p_response = NULL;
                } else if (receivedCmd[0] == MIFARE_ULEV1_INCR_CNT && tagType == 7) {   // Received a INC COUNTER -- 
                        // number of counter


@@ -1126,16 +1127,16 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) {
                
                        // send ACK
                        uint8_t ack[] = {0x0a};
                
                        // send ACK
                        uint8_t ack[] = {0x0a};

-                       EmSendCmdEx(ack,sizeof(ack),false);
+                       EmSendCmd(ack,sizeof(ack));

                        p_response = NULL;                      
                } else if(receivedCmd[0] == MIFARE_ULEV1_CHECKTEAR && tagType == 7) {   // Received a CHECK_TEARING_EVENT -- 
                        p_response = NULL;                      
                } else if(receivedCmd[0] == MIFARE_ULEV1_CHECKTEAR && tagType == 7) {   // Received a CHECK_TEARING_EVENT -- 

-                       //first 12 blocks of emu are [getversion answer - check tearing - pack - 0x00 - signature]
+                       // 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);
                        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);     
+                       EmSendCmd(emdata, sizeof(emdata));      

                        p_response = NULL;              
                } else if(receivedCmd[0] == ISO14443A_CMD_HALT) {       // Received a HALT
                        LogTrace(receivedCmd, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
                        p_response = NULL;              
                } else if(receivedCmd[0] == ISO14443A_CMD_HALT) {       // Received a HALT
                        LogTrace(receivedCmd, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);


@@ -1145,10 +1146,24 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) {
                                uint8_t emdata[10];
                                emlGetMemBt( emdata, 0, 8 );
                                AppendCrc14443a(emdata, sizeof(emdata)-2);
                                uint8_t emdata[10];
                                emlGetMemBt( emdata, 0, 8 );
                                AppendCrc14443a(emdata, sizeof(emdata)-2);

-                               EmSendCmdEx(emdata, sizeof(emdata), false);     
+                               EmSendCmd(emdata, sizeof(emdata));

                                p_response = NULL;
                        } else {
                                p_response = NULL;
                        } else {

-                               p_response = &responses[5]; order = 7;
+                                                               
+                               cardAUTHKEY = receivedCmd[0] - 0x60;
+                               cardAUTHSC = receivedCmd[1] / 4; // received block num
+                               
+                               // incease nonce at AUTH requests. this is time consuming.
+                               nonce = prand();
+                               //num_to_bytes(nonce, 4, response5);
+                               num_to_bytes(nonce, 4, dynamic_response_info.response);                         
+                               dynamic_response_info.response_n = 4;
+
+                               //prepare_tag_modulation(&responses[5], DYNAMIC_MODULATION_BUFFER_SIZE);
+                               prepare_tag_modulation(&dynamic_response_info, DYNAMIC_MODULATION_BUFFER_SIZE);
+                               p_response = &dynamic_response_info;
+                               //p_response = &responses[5]; 
+                               order = 7;

                        }
                } else if(receivedCmd[0] == ISO14443A_CMD_RATS) {       // Received a RATS request
                        if (tagType == 1 || tagType == 2) {     // RATS not supported
                        }
                } else if(receivedCmd[0] == ISO14443A_CMD_RATS) {       // Received a RATS request
                        if (tagType == 1 || tagType == 2) {     // RATS not supported


@@ -1161,42 +1176,73 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) {
                        LogTrace(receivedCmd, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
                        uint32_t nr = bytes_to_num(receivedCmd,4);
                        uint32_t ar = bytes_to_num(receivedCmd+4,4);
                        LogTrace(receivedCmd, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
                        uint32_t nr = bytes_to_num(receivedCmd,4);
                        uint32_t ar = bytes_to_num(receivedCmd+4,4);

-
+                
+                       // Collect AR/NR per keytype & sector

                        if ( (flags & FLAG_NR_AR_ATTACK) == FLAG_NR_AR_ATTACK ) {
                        if ( (flags & FLAG_NR_AR_ATTACK) == FLAG_NR_AR_ATTACK ) {

-                               if(ar_nr_collected < 2){
-                                       ar_nr_responses[ar_nr_collected*4]   = cuid;
-                                       ar_nr_responses[ar_nr_collected*4+1] = nonce;
-                                       ar_nr_responses[ar_nr_collected*4+2] = nr;
-                                       ar_nr_responses[ar_nr_collected*4+3] = ar;
-                                       ar_nr_collected++;
-                               }                       
-                               if(ar_nr_collected > 1 ) {              
-                                       if (MF_DBGLEVEL >= 2 && !(flags & FLAG_INTERACTIVE)) {
-                                                       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], // CUID
-                                                               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
-                                                       );
+                               
+                               int8_t index = -1;
+                               int8_t empty = -1;
+                               for (uint8_t i = 0; i < ATTACK_KEY_COUNT; i++) {
+                                       // find which index to use
+                                       if ( (cardAUTHSC == ar_nr_nonces[i].sector) &&  (cardAUTHKEY == ar_nr_nonces[i].keytype)) 
+                                               index = i;
+
+                                       // keep track of empty slots.
+                                       if ( ar_nr_nonces[i].state == EMPTY)
+                                               empty = i;
+                               }
+                               // if no empty slots.  Choose first and overwrite.
+                               if ( index == -1 ) {
+                                       if ( empty == -1 ) {
+                                               index = 0;
+                                               ar_nr_nonces[index].state = EMPTY;
+                                       } else {
+                                               index = empty;
+                                       }
+                               }
+
+                               switch(ar_nr_nonces[index].state) {
+                                       case EMPTY: {
+                                               // first nonce collect
+                                               ar_nr_nonces[index].cuid = cuid;
+                                               ar_nr_nonces[index].sector = cardAUTHSC;
+                                               ar_nr_nonces[index].keytype = cardAUTHKEY;
+                                               ar_nr_nonces[index].nonce = nonce;
+                                               ar_nr_nonces[index].nr = nr;
+                                               ar_nr_nonces[index].ar = ar;
+                                               ar_nr_nonces[index].state = FIRST;
+                                               break;
+                                       } 
+                                       case FIRST : { 
+                                               // second nonce collect
+                                               ar_nr_nonces[index].nonce2 = nonce;
+                                               ar_nr_nonces[index].nr2 = nr;
+                                               ar_nr_nonces[index].ar2 = ar;
+                                               ar_nr_nonces[index].state = SECOND;
+
+                                               // send to client
+                                               cmd_send(CMD_ACK, CMD_SIMULATE_MIFARE_CARD, 0, 0, &ar_nr_nonces[index], sizeof(nonces_t));
+                                               
+                                               ar_nr_nonces[index].state = EMPTY;
+                                               ar_nr_nonces[index].sector = 0;
+                                               ar_nr_nonces[index].keytype = 0;
+                                               
+                                               moebius_count++;
+                                               break;

                                        }
                                        }

-                                       uint8_t len = ar_nr_collected*4*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);
+                                       default: break;

                                }
                        }
                                }
                        }

+                       p_response = NULL;

                        
                } else if (receivedCmd[0] == MIFARE_ULC_AUTH_1 ) { // ULC authentication, or Desfire Authentication
                } else if (receivedCmd[0] == MIFARE_ULEV1_AUTH) { // NTAG / EV-1 authentication
                        if ( tagType == 7 ) {
                        
                } else if (receivedCmd[0] == MIFARE_ULC_AUTH_1 ) { // ULC authentication, or Desfire Authentication
                } else if (receivedCmd[0] == MIFARE_ULEV1_AUTH) { // NTAG / EV-1 authentication
                        if ( tagType == 7 ) {

-                               uint16_t start = 13; //first 4 blocks of emu are [getversion answer - check tearing - pack - 0x00]
+                               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);
                                uint8_t emdata[4];
                                emlGetMemBt( emdata, start, 2);
                                AppendCrc14443a(emdata, 2);

-                               EmSendCmdEx(emdata, sizeof(emdata), false);
+                               EmSendCmd(emdata, sizeof(emdata));

                                p_response = NULL;
                                uint32_t pwd = bytes_to_num(receivedCmd+1,4);
                                
                                p_response = NULL;
                                uint32_t pwd = bytes_to_num(receivedCmd+1,4);
                                


@@ -1227,8 +1273,8 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) {
                                  dynamic_response_info.response_n = 2;
                                } break;
 
                                  dynamic_response_info.response_n = 2;
                                } break;
 

-                               case 0xaa:
-                               case 0xbb: {
+                               case 0xAA:
+                               case 0xBB: {

                                  dynamic_response_info.response[0] = receivedCmd[0] ^ 0x11;
                                  dynamic_response_info.response_n = 2;
                                } break;
                                  dynamic_response_info.response[0] = receivedCmd[0] ^ 0x11;
                                  dynamic_response_info.response_n = 2;
                                } break;


@@ -1261,11 +1307,11 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) {
                                dynamic_response_info.response[1] = receivedCmd[1];
 
                                // Add CRC bytes, always used in ISO 14443A-4 compliant cards
                                dynamic_response_info.response[1] = receivedCmd[1];
 
                                // Add CRC bytes, always used in ISO 14443A-4 compliant cards

-                               AppendCrc14443a(dynamic_response_info.response,dynamic_response_info.response_n);
+                               AppendCrc14443a(dynamic_response_info.response, dynamic_response_info.response_n);

                                dynamic_response_info.response_n += 2;
         
                                if (prepare_tag_modulation(&dynamic_response_info,DYNAMIC_MODULATION_BUFFER_SIZE) == false) {
                                dynamic_response_info.response_n += 2;
         
                                if (prepare_tag_modulation(&dynamic_response_info,DYNAMIC_MODULATION_BUFFER_SIZE) == false) {

-                                       Dbprintf("Error preparing tag response");
+                                       DbpString("Error preparing tag response");

                                        LogTrace(receivedCmd, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
                                        break;
                                }
                                        LogTrace(receivedCmd, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
                                        break;
                                }


@@ -1281,7 +1327,7 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) {
 
                // comment this limit if you want to simulation longer          
                if (!tracing) {
 
                // comment this limit if you want to simulation longer          
                if (!tracing) {

-                       Dbprintf("Trace Full. Simulation stopped.");
+                       DbpString("Trace Full. Simulation stopped.");

                        break;
                }
                // comment this limit if you want to simulation longer
                        break;
                }
                // comment this limit if you want to simulation longer


@@ -1292,7 +1338,7 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) {
                cmdsRecvd++;
 
                if (p_response != NULL) {
                cmdsRecvd++;
 
                if (p_response != NULL) {

-                       EmSendCmd14443aRaw(p_response->modulation, p_response->modulation_n, receivedCmd[0] == 0x52);
+                       EmSendCmd14443aRaw(p_response->modulation, p_response->modulation_n);

                        // do the tracing for the previous reader request and this tag answer:
                        uint8_t par[MAX_PARITY_SIZE] = {0x00};
                        GetParity(p_response->response, p_response->response_n, par);
                        // do the tracing for the previous reader request and this tag answer:
                        uint8_t par[MAX_PARITY_SIZE] = {0x00};
                        GetParity(p_response->response, p_response->response_n, par);


@@ -1314,12 +1360,15 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) {
        set_tracing(FALSE);
        BigBuf_free_keep_EM();
        LED_A_OFF();
        set_tracing(FALSE);
        BigBuf_free_keep_EM();
        LED_A_OFF();

-       
+

        if (MF_DBGLEVEL >= 4){
        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);
+               Dbprintf("-[ Num of moebius tries [%d]", moebius_count);

        }
        }

+       
+       cmd_send(CMD_ACK,1,0,0,0,0);

 }
 
 // prepare a delayed transfer. This simply shifts ToSend[] by a number
 }
 
 // prepare a delayed transfer. This simply shifts ToSend[] by a number


@@ -1396,8 +1445,7 @@ static void TransmitFor14443a(const uint8_t *cmd, uint16_t len, uint32_t *timing
 //-----------------------------------------------------------------------------
 // Prepare reader command (in bits, support short frames) to send to FPGA
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
 // Prepare reader command (in bits, support short frames) to send to FPGA
 //-----------------------------------------------------------------------------

-void CodeIso14443aBitsAsReaderPar(const uint8_t *cmd, uint16_t bits, const uint8_t *parity)
-{
+void CodeIso14443aBitsAsReaderPar(const uint8_t *cmd, uint16_t bits, const uint8_t *parity) {

        int i, j;
        int last = 0;
        uint8_t b;
        int i, j;
        int last = 0;
        uint8_t b;


@@ -1485,7 +1533,7 @@ void CodeIso14443aAsReaderPar(const uint8_t *cmd, uint16_t len, const uint8_t *p
 // Stop when button is pressed (return 1) or field was gone (return 2)
 // Or return 0 when command is captured
 //-----------------------------------------------------------------------------
 // Stop when button is pressed (return 1) or field was gone (return 2)
 // Or return 0 when command is captured
 //-----------------------------------------------------------------------------

-static int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity) {
+int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity) {

        *len = 0;
 
        uint32_t timer = 0, vtime = 0;
        *len = 0;
 
        uint32_t timer = 0, vtime = 0;


@@ -1548,17 +1596,25 @@ static int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity) {
        }
 }
 
        }
 }
 

-int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNeeded) {
+int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen) {

        uint8_t b;
        uint16_t i = 0;
        uint32_t ThisTransferTime;
        uint8_t b;
        uint16_t i = 0;
        uint32_t ThisTransferTime;

+       bool correctionNeeded;

        
        // Modulate Manchester
        FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_MOD);
 
        
        // Modulate Manchester
        FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_MOD);
 

-       // include correction bit if necessary
-       if (Uart.parityBits & 0x01) {
-               correctionNeeded = TRUE;
+       // Include correction bit if necessary
+       if (Uart.bitCount == 7)
+       {
+               // Short tags (7 bits) don't have parity, determine the correct value from MSB
+               correctionNeeded = Uart.output[0] & 0x40;
+       }
+       else
+       {
+               // The parity bits are left-aligned
+               correctionNeeded = Uart.parity[(Uart.len-1)/8] & (0x80 >> ((Uart.len-1) & 7));

        }
        // 1236, so correction bit needed
        i = (correctionNeeded) ? 0 : 1;
        }
        // 1236, so correction bit needed
        i = (correctionNeeded) ? 0 : 1;


@@ -1599,13 +1655,13 @@ int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNeeded) {
                        i++;
                }
        }
                        i++;
                }
        }

-       LastTimeProxToAirStart = ThisTransferTime + (correctionNeeded?8:0);
+       LastTimeProxToAirStart = ThisTransferTime + (correctionNeeded ? 8 : 0);

        return 0;
 }
 
        return 0;
 }
 

-int EmSend4bitEx(uint8_t resp, bool correctionNeeded){
+int EmSend4bit(uint8_t resp){

        Code4bitAnswerAsTag(resp);
        Code4bitAnswerAsTag(resp);

-       int res = EmSendCmd14443aRaw(ToSend, ToSendMax, correctionNeeded);
+       int res = EmSendCmd14443aRaw(ToSend, ToSendMax);

        // do the tracing for the previous reader request and this tag answer:
        uint8_t par[1] = {0x00};
        GetParity(&resp, 1, par);
        // do the tracing for the previous reader request and this tag answer:
        uint8_t par[1] = {0x00};
        GetParity(&resp, 1, par);


@@ -1622,13 +1678,9 @@ int EmSend4bitEx(uint8_t resp, bool correctionNeeded){
        return res;
 }
 
        return res;
 }
 

-int EmSend4bit(uint8_t resp){
-       return EmSend4bitEx(resp, false);
-}
-
-int EmSendCmdExPar(uint8_t *resp, uint16_t respLen, bool correctionNeeded, uint8_t *par){
+int EmSendCmdPar(uint8_t *resp, uint16_t respLen, uint8_t *par){

        CodeIso14443aAsTagPar(resp, respLen, par);
        CodeIso14443aAsTagPar(resp, respLen, par);

-       int res = EmSendCmd14443aRaw(ToSend, ToSendMax, correctionNeeded);
+       int res = EmSendCmd14443aRaw(ToSend, ToSendMax);

        // do the tracing for the previous reader request and this tag answer:
        EmLogTrace(Uart.output, 
                                Uart.len, 
        // do the tracing for the previous reader request and this tag answer:
        EmLogTrace(Uart.output, 
                                Uart.len, 


@@ -1643,20 +1695,10 @@ int EmSendCmdExPar(uint8_t *resp, uint16_t respLen, bool correctionNeeded, uint8
        return res;
 }
 
        return res;
 }
 

-int EmSendCmdEx(uint8_t *resp, uint16_t respLen, bool correctionNeeded){
-       uint8_t par[MAX_PARITY_SIZE] = {0x00};
-       GetParity(resp, respLen, par);
-       return EmSendCmdExPar(resp, respLen, correctionNeeded, par);
-}
-

 int EmSendCmd(uint8_t *resp, uint16_t respLen){
        uint8_t par[MAX_PARITY_SIZE] = {0x00};
        GetParity(resp, respLen, par);
 int EmSendCmd(uint8_t *resp, uint16_t respLen){
        uint8_t par[MAX_PARITY_SIZE] = {0x00};
        GetParity(resp, respLen, par);

-       return EmSendCmdExPar(resp, respLen, false, par);
-}
-
-int EmSendCmdPar(uint8_t *resp, uint16_t respLen, uint8_t *par){
-       return EmSendCmdExPar(resp, respLen, false, par);
+       return EmSendCmdPar(resp, respLen, par);

 }
 
 bool EmLogTrace(uint8_t *reader_data, uint16_t reader_len, uint32_t reader_StartTime, uint32_t reader_EndTime, uint8_t *reader_Parity,
 }
 
 bool EmLogTrace(uint8_t *reader_data, uint16_t reader_len, uint32_t reader_StartTime, uint32_t reader_EndTime, uint8_t *reader_Parity,


@@ -1761,10 +1803,10 @@ int ReaderReceive(uint8_t *receivedAnswer, uint8_t *parity) {
 // 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) {
 // 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 rats[]       = { 0xE0,0x80,0x00,0x00 }; // FSD=256, FSDI=8, CID=0
+       uint8_t wupa[]       = { ISO14443A_CMD_WUPA };  // 0x26 - ISO14443A_CMD_REQA  0x52 - ISO14443A_CMD_WUPA
+       uint8_t sel_all[]    = { ISO14443A_CMD_ANTICOLL_OR_SELECT,0x20 };
+       uint8_t sel_uid[]    = { ISO14443A_CMD_ANTICOLL_OR_SELECT,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+       uint8_t rats[]       = { ISO14443A_CMD_RATS,0x80,0x00,0x00 }; // FSD=256, FSDI=8, CID=0

        uint8_t resp[MAX_FRAME_SIZE] = {0}; // theoretically. A usual RATS will be much smaller
        uint8_t resp_par[MAX_PARITY_SIZE] = {0};
        byte_t uid_resp[4] = {0};
        uint8_t resp[MAX_FRAME_SIZE] = {0}; // theoretically. A usual RATS will be much smaller
        uint8_t resp_par[MAX_PARITY_SIZE] = {0};
        byte_t uid_resp[4] = {0};


@@ -1792,6 +1834,9 @@ 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);
        }
 

+       // reset the PCB block number
+       iso14_pcb_blocknum = 0;
+       

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


@@ -1903,41 +1948,37 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u
                p_hi14a_card->ats_len = len;
        }
 
                p_hi14a_card->ats_len = len;
        }
 

-       // reset the PCB block number
-       iso14_pcb_blocknum = 0;
-

        // set default timeout based on ATS
        iso14a_set_ATS_timeout(resp);
        // set default timeout based on ATS
        iso14a_set_ATS_timeout(resp);

-

        return 1;       
 }
 
 void iso14443a_setup(uint8_t fpga_minor_mode) {
        return 1;       
 }
 
 void iso14443a_setup(uint8_t fpga_minor_mode) {

+

        FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
        // Set up the synchronous serial port
        FpgaSetupSsc();
        // connect Demodulated Signal to ADC:
        SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
 
        FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
        // Set up the synchronous serial port
        FpgaSetupSsc();
        // connect Demodulated Signal to ADC:
        SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
 

-       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | fpga_minor_mode);
-       

        LED_D_OFF();
        // Signal field is on with the appropriate LED
        if (fpga_minor_mode == FPGA_HF_ISO14443A_READER_MOD ||
                fpga_minor_mode == FPGA_HF_ISO14443A_READER_LISTEN)
                LED_D_ON();
 
        LED_D_OFF();
        // Signal field is on with the appropriate LED
        if (fpga_minor_mode == FPGA_HF_ISO14443A_READER_MOD ||
                fpga_minor_mode == FPGA_HF_ISO14443A_READER_LISTEN)
                LED_D_ON();
 

-       // Prepare the demodulation functions
-       DemodReset();
-       UartReset();
-
-       iso14a_set_timeout(10*106); // 10ms default
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | fpga_minor_mode);

 
 

-       //NextTransferTime = 2 * DELAY_ARM2AIR_AS_READER;
-       NextTransferTime = DELAY_ARM2AIR_AS_READER << 1;
+       SpinDelay(20);

        
        // Start the timer
        StartCountSspClk();
        
        // Start the timer
        StartCountSspClk();

+       
+       // Prepare the demodulation functions
+       DemodReset();
+       UartReset();
+       NextTransferTime = 2 * DELAY_ARM2AIR_AS_READER;
+       iso14a_set_timeout(10*106); // 20ms 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) {


@@ -1966,13 +2007,12 @@ int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data) {
        {
                iso14_pcb_blocknum ^= 1;
        }
        {
                iso14_pcb_blocknum ^= 1;
        }

-

        return len;
 }
 
        return len;
 }
 

+

 //-----------------------------------------------------------------------------
 // Read an ISO 14443a tag. Send out commands and store answers.
 //-----------------------------------------------------------------------------
 // Read an ISO 14443a tag. Send out commands and store answers.

-//

 //-----------------------------------------------------------------------------
 void ReaderIso14443a(UsbCommand *c) {
        iso14a_command_t param = c->arg[0];
 //-----------------------------------------------------------------------------
 void ReaderIso14443a(UsbCommand *c) {
        iso14a_command_t param = c->arg[0];


@@ -2012,17 +2052,17 @@ void ReaderIso14443a(UsbCommand *c) {
        }
 
        if (param & ISO14A_RAW) {
        }
 
        if (param & ISO14A_RAW) {

-               if(param & ISO14A_APPEND_CRC) {
-                       if(param & ISO14A_TOPAZMODE) {
+               if (param & ISO14A_APPEND_CRC) {
+                       if (param & ISO14A_TOPAZMODE)

                                AppendCrc14443b(cmd,len);
                                AppendCrc14443b(cmd,len);

-                       } else {
+                       else

                                AppendCrc14443a(cmd,len);
                                AppendCrc14443a(cmd,len);

-                       }
+                       

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

-               if(lenbits>0) {                         // want to send a specific number of bits (e.g. short commands)
-                       if(param & ISO14A_TOPAZMODE) {
+               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
                                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


@@ -2036,7 +2076,7 @@ void ReaderIso14443a(UsbCommand *c) {
                                ReaderTransmitBitsPar(cmd, lenbits, par, NULL);                                                 // bytes are 8 bit with odd parity
                        }
                } else {                                        // want to send complete bytes only
                                ReaderTransmitBitsPar(cmd, lenbits, par, NULL);                                                 // bytes are 8 bit with odd parity
                        }
                } else {                                        // want to send complete bytes only

-                       if(param & ISO14A_TOPAZMODE) {
+                       if (param & ISO14A_TOPAZMODE) {

                                uint16_t i = 0;
                                ReaderTransmitBitsPar(&cmd[i++], 7, NULL, NULL);                                                // first byte: 7 bits, no paritiy
                                while (i < len) {
                                uint16_t i = 0;
                                ReaderTransmitBitsPar(&cmd[i++], 7, NULL, NULL);                                                // first byte: 7 bits, no paritiy
                                while (i < len) {


@@ -2068,29 +2108,29 @@ int32_t dist_nt(uint32_t nt1, uint32_t nt2) {
 
        if (nt1 == nt2) return 0;
        
 
        if (nt1 == nt2) return 0;
        

-       uint16_t i;

        uint32_t nttmp1 = nt1;
        uint32_t nttmp2 = nt2;
 
        uint32_t nttmp1 = nt1;
        uint32_t nttmp2 = nt2;
 

-       for (i = 1; i < (32768/8); ++i) {
+       // 0xFFFF -- Half up and half down to find distance between nonces
+       for (uint16_t i = 1; i < 32768/8; i += 8) {

                nttmp1 = prng_successor(nttmp1, 1);     if (nttmp1 == nt2) return i;
                nttmp1 = prng_successor(nttmp1, 1);     if (nttmp1 == nt2) return i;

-               nttmp2 = prng_successor(nttmp2, 1);     if (nttmp2 == nt1) return -i;
-               

                nttmp1 = prng_successor(nttmp1, 1);     if (nttmp1 == nt2) return i+1;
                nttmp1 = prng_successor(nttmp1, 1);     if (nttmp1 == nt2) return i+1;

-               nttmp2 = prng_successor(nttmp2, 1);     if (nttmp2 == nt1) return -(i+1);

                nttmp1 = prng_successor(nttmp1, 1);     if (nttmp1 == nt2) return i+2;
                nttmp1 = prng_successor(nttmp1, 1);     if (nttmp1 == nt2) return i+2;

-               nttmp2 = prng_successor(nttmp2, 1);     if (nttmp2 == nt1) return -(i+2);

                nttmp1 = prng_successor(nttmp1, 1);     if (nttmp1 == nt2) return i+3;
                nttmp1 = prng_successor(nttmp1, 1);     if (nttmp1 == nt2) return i+3;

-               nttmp2 = prng_successor(nttmp2, 1);     if (nttmp2 == nt1) return -(i+3);

                nttmp1 = prng_successor(nttmp1, 1);     if (nttmp1 == nt2) return i+4;
                nttmp1 = prng_successor(nttmp1, 1);     if (nttmp1 == nt2) return i+4;

-               nttmp2 = prng_successor(nttmp2, 1);     if (nttmp2 == nt1) return -(i+4);

                nttmp1 = prng_successor(nttmp1, 1);     if (nttmp1 == nt2) return i+5;
                nttmp1 = prng_successor(nttmp1, 1);     if (nttmp1 == nt2) return i+5;

-               nttmp2 = prng_successor(nttmp2, 1);     if (nttmp2 == nt1) return -(i+5);

                nttmp1 = prng_successor(nttmp1, 1);     if (nttmp1 == nt2) return i+6;
                nttmp1 = prng_successor(nttmp1, 1);     if (nttmp1 == nt2) return i+6;

-               nttmp2 = prng_successor(nttmp2, 1);     if (nttmp2 == nt1) return -(i+6);

                nttmp1 = prng_successor(nttmp1, 1);     if (nttmp1 == nt2) return i+7;
                nttmp1 = prng_successor(nttmp1, 1);     if (nttmp1 == nt2) return i+7;

-               nttmp2 = prng_successor(nttmp2, 1);     if (nttmp2 == nt1) return -(i+7);
-       }       
+               
+               nttmp2 = prng_successor(nttmp2, 1);     if (nttmp2 == nt1) return -i;
+               nttmp2 = prng_successor(nttmp2, 1);     if (nttmp2 == nt1) return -(i+1);
+               nttmp2 = prng_successor(nttmp2, 1);     if (nttmp2 == nt1) return -(i+2);
+               nttmp2 = prng_successor(nttmp2, 1);     if (nttmp2 == nt1) return -(i+3);
+               nttmp2 = prng_successor(nttmp2, 1);     if (nttmp2 == nt1) return -(i+4);
+               nttmp2 = prng_successor(nttmp2, 1);     if (nttmp2 == nt1) return -(i+5);
+               nttmp2 = prng_successor(nttmp2, 1);     if (nttmp2 == nt1) return -(i+6);
+               nttmp2 = prng_successor(nttmp2, 1);     if (nttmp2 == nt1) return -(i+7);               
+       }

        // either nt1 or nt2 are invalid nonces 
        return(-99999); 
 }
        // either nt1 or nt2 are invalid nonces 
        return(-99999); 
 }


@@ -2101,8 +2141,10 @@ 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, uint8_t block ) {
-       uint8_t mf_auth[]       = { MIFARE_AUTH_KEYA, block, 0x00, 0x00 };
+
+void ReaderMifare(bool first_try, uint8_t block, uint8_t keytype ) {
+       
+       uint8_t mf_auth[]       = { keytype, block, 0x00, 0x00 };

        uint8_t mf_nr_ar[]      = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
        uint8_t uid[10]         = {0,0,0,0,0,0,0,0,0,0};
        uint8_t par_list[8]     = {0,0,0,0,0,0,0,0};
        uint8_t mf_nr_ar[]      = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
        uint8_t uid[10]         = {0,0,0,0,0,0,0,0,0,0};
        uint8_t par_list[8]     = {0,0,0,0,0,0,0,0};


@@ -2135,19 +2177,22 @@ void ReaderMifare(bool first_try, uint8_t block ) {
        #define PRNG_SEQUENCE_LENGTH    (1 << 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 PRNG_SEQUENCE_LENGTH    (1 << 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

-
+       
+       AppendCrc14443a(mf_auth, 2);
+       

        BigBuf_free(); BigBuf_Clear_ext(false); 
        clear_trace();
        BigBuf_free(); BigBuf_Clear_ext(false); 
        clear_trace();

-       set_tracing(TRUE);      
+       set_tracing(FALSE);     

        iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
 
        iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
 

-       AppendCrc14443a(mf_auth, 2);
+       sync_time = GetCountSspClk() & 0xfffffff8;
+       sync_cycles = PRNG_SEQUENCE_LENGTH; // Mifare Classic's random generator repeats every 2^16 cycles (and so do the nonces).              
+       nt_attacked = 0;

        
        

-       if (first_try) { 
-               sync_time = GetCountSspClk() & 0xfffffff8;
-               sync_cycles = PRNG_SEQUENCE_LENGTH + 1130; //65536;     //0x10000       // Mifare Classic's random generator repeats every 2^16 cycles (and so do the nonces).
-               mf_nr_ar3 = 0;                  
-               nt_attacked = 0;
+   if (MF_DBGLEVEL >= 4)       Dbprintf("Mifare::Sync %u", sync_time);
+                               
+       if (first_try) {
+               mf_nr_ar3 = 0;

                par_low = 0;
        } else {
                // we were unsuccessful on a previous call. 
                par_low = 0;
        } else {
                // we were unsuccessful on a previous call. 


@@ -2216,9 +2261,9 @@ void ReaderMifare(bool first_try, uint8_t block ) {
                // Transmit reader nonce with fake par
                ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par, NULL);
        
                // Transmit reader nonce with fake par
                ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar), par, NULL);
        

-               WDT_HIT();
-               LED_B_ON();
-               if (first_try && previous_nt && !nt_attacked) { // we didn't calibrate our clock yet
+               // we didn't calibrate our clock yet,
+               // iceman: has to be calibrated every time.
+               if (previous_nt && !nt_attacked) { 

 
                        nt_distance = dist_nt(previous_nt, nt);
                        
 
                        nt_distance = dist_nt(previous_nt, nt);
                        


@@ -2257,7 +2302,7 @@ void ReaderMifare(bool first_try, uint8_t block ) {
                }
                LED_B_OFF();
 
                }
                LED_B_OFF();
 

-               if ((nt != nt_attacked) && nt_attacked) {       // we somehow lost sync. Try to catch up again...
+               if ( (nt != nt_attacked) && nt_attacked) {      // we somehow lost sync. Try to catch up again...

                        
                        catch_up_cycles = ABS(dist_nt(nt_attacked, nt));
                        if (catch_up_cycles == 99999) {                 // invalid nonce received. Don't resync on that one.
                        
                        catch_up_cycles = ABS(dist_nt(nt_attacked, nt));
                        if (catch_up_cycles == 99999) {                 // invalid nonce received. Don't resync on that one.


@@ -2347,6 +2392,7 @@ void ReaderMifare(bool first_try, uint8_t block ) {
        set_tracing(FALSE);
 }
 
        set_tracing(FALSE);
 }
 

+

 /**
   *MIFARE 1K simulate.
   *
 /**
   *MIFARE 1K simulate.
   *


@@ -2360,6 +2406,10 @@ void ReaderMifare(bool first_try, uint8_t block ) {
   *@param exitAfterNReads, exit simulation after n blocks have been read, 0 is inifite
   */
 void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *datain) {
   *@param exitAfterNReads, exit simulation after n blocks have been read, 0 is inifite
   */
 void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *datain) {

+
+       // init pseudorand
+       fast_prand( GetTickCount() );
+       

        int cardSTATE = MFEMUL_NOFIELD;
        int _UID_LEN = 0;  // 4, 7, 10
        int vHf = 0;    // in mV
        int cardSTATE = MFEMUL_NOFIELD;
        int _UID_LEN = 0;  // 4, 7, 10
        int vHf = 0;    // in mV


@@ -2377,7 +2427,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
        struct Crypto1State mpcs = {0, 0};
        struct Crypto1State *pcs;
        pcs = &mpcs;
        struct Crypto1State mpcs = {0, 0};
        struct Crypto1State *pcs;
        pcs = &mpcs;

-       uint32_t numReads = 0;  //Counts numer of times reader read a block
+       uint32_t numReads = 0;  // Counts numer of times reader read a block

        uint8_t receivedCmd[MAX_MIFARE_FRAME_SIZE] = {0x00};
        uint8_t receivedCmd_par[MAX_MIFARE_PARITY_SIZE] = {0x00};
        uint8_t response[MAX_MIFARE_FRAME_SIZE] = {0x00};
        uint8_t receivedCmd[MAX_MIFARE_FRAME_SIZE] = {0x00};
        uint8_t receivedCmd_par[MAX_MIFARE_PARITY_SIZE] = {0x00};
        uint8_t response[MAX_MIFARE_FRAME_SIZE] = {0x00};


@@ -2387,26 +2437,26 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
        uint8_t sak_4[]  = {0x0C, 0x00, 0x00}; // CL1 - 4b uid
        uint8_t sak_7[]  = {0x0C, 0x00, 0x00}; // CL2 - 7b uid
        uint8_t sak_10[] = {0x0C, 0x00, 0x00}; // CL3 - 10b uid
        uint8_t sak_4[]  = {0x0C, 0x00, 0x00}; // CL1 - 4b uid
        uint8_t sak_7[]  = {0x0C, 0x00, 0x00}; // CL2 - 7b uid
        uint8_t sak_10[] = {0x0C, 0x00, 0x00}; // CL3 - 10b uid

-       //uint8_t sak[] = {0x09, 0x3f, 0xcc };  // Mifare Mini 
+       // uint8_t sak[] = {0x09, 0x3f, 0xcc };  // Mifare Mini 

        
        uint8_t rUIDBCC1[] = {0xde, 0xad, 0xbe, 0xaf, 0x62}; 
        uint8_t rUIDBCC2[] = {0xde, 0xad, 0xbe, 0xaf, 0x62}; 
        uint8_t rUIDBCC3[] = {0xde, 0xad, 0xbe, 0xaf, 0x62};
 
        
        uint8_t rUIDBCC1[] = {0xde, 0xad, 0xbe, 0xaf, 0x62}; 
        uint8_t rUIDBCC2[] = {0xde, 0xad, 0xbe, 0xaf, 0x62}; 
        uint8_t rUIDBCC3[] = {0xde, 0xad, 0xbe, 0xaf, 0x62};
 

-       uint8_t rAUTH_NT[] = {0x01, 0x01, 0x01, 0x01};  // very random nonce
-       //uint8_t rAUTH_NT[] = {0x55, 0x41, 0x49, 0x92};// nonce from nested? why this?
+       // TAG Nonce - Authenticate response
+       uint8_t rAUTH_NT[4];
+       uint32_t nonce = prand();
+       num_to_bytes(nonce, 4, rAUTH_NT);
+       
+       // uint8_t rAUTH_NT[] = {0x55, 0x41, 0x49, 0x92};// nonce from nested? why this?

        uint8_t rAUTH_AT[] = {0x00, 0x00, 0x00, 0x00};
        uint8_t rAUTH_AT[] = {0x00, 0x00, 0x00, 0x00};

-               
+       

        // Here, we collect CUID, NT, NR, AR, CUID2, NT2, NR2, AR2
        // This can be used in a reader-only attack.
        // Here, we collect CUID, NT, NR, AR, CUID2, NT2, NR2, AR2
        // This can be used in a reader-only attack.

-       uint32_t ar_nr_responses[] = {0,0,0,0,0,0,0,0,0};
-       uint8_t ar_nr_collected = 0;
+       nonces_t ar_nr_nonces[ATTACK_KEY_COUNT];
+       memset(ar_nr_nonces, 0x00, sizeof(ar_nr_nonces));

 
 

-       // Authenticate response - nonce
-       uint32_t nonce = bytes_to_num(rAUTH_NT, 4);
-       ar_nr_responses[1] = nonce;
-       
-       //-- Determine the UID
+       // -- Determine the UID

        // Can be set from emulator memory or incoming data
        // Length: 4,7,or 10 bytes
        if ( (flags & FLAG_UID_IN_EMUL) == FLAG_UID_IN_EMUL)
        // Can be set from emulator memory or incoming data
        // Length: 4,7,or 10 bytes
        if ( (flags & FLAG_UID_IN_EMUL) == FLAG_UID_IN_EMUL)


@@ -2430,7 +2480,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                case 4:
                        sak_4[0] &= 0xFB;               
                        // save CUID
                case 4:
                        sak_4[0] &= 0xFB;               
                        // save CUID

-                       ar_nr_responses[0] = cuid = bytes_to_num(rUIDBCC1, 4);
+                       cuid = bytes_to_num(rUIDBCC1, 4);

                        // BCC
                        rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
                        if (MF_DBGLEVEL >= 2)   {
                        // BCC
                        rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
                        if (MF_DBGLEVEL >= 2)   {


@@ -2446,7 +2496,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                        atqa[0] |= 0x40;
                        sak_7[0] &= 0xFB;                                               
                        // save CUID
                        atqa[0] |= 0x40;
                        sak_7[0] &= 0xFB;                                               
                        // save CUID

-                       ar_nr_responses[0] = cuid = bytes_to_num(rUIDBCC2, 4);                  
+                       cuid = bytes_to_num(rUIDBCC2, 4);                       

                         // CascadeTag, CT
                        rUIDBCC1[0] = 0x88;
                        // BCC
                         // CascadeTag, CT
                        rUIDBCC1[0] = 0x88;
                        // BCC


@@ -2468,7 +2518,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                        atqa[0] |= 0x80;
                        sak_10[0] &= 0xFB;                                      
                        // save CUID
                        atqa[0] |= 0x80;
                        sak_10[0] &= 0xFB;                                      
                        // save CUID

-                       ar_nr_responses[0] = cuid = bytes_to_num(rUIDBCC3, 4);
+                       cuid = bytes_to_num(rUIDBCC3, 4);

                         // CascadeTag, CT
                        rUIDBCC1[0] = 0x88;
                        rUIDBCC2[0] = 0x88;
                         // CascadeTag, CT
                        rUIDBCC1[0] = 0x88;
                        rUIDBCC2[0] = 0x88;


@@ -2522,26 +2572,26 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                } 
                if (cardSTATE == MFEMUL_NOFIELD) continue;
 
                } 
                if (cardSTATE == MFEMUL_NOFIELD) continue;
 

-               //Now, get data
+               // Now, get data

                res = EmGetCmd(receivedCmd, &len, receivedCmd_par);
                if (res == 2) { //Field is off!
                        cardSTATE = MFEMUL_NOFIELD;
                        LEDsoff();
                        continue;
                } else if (res == 1) {
                res = EmGetCmd(receivedCmd, &len, receivedCmd_par);
                if (res == 2) { //Field is off!
                        cardSTATE = MFEMUL_NOFIELD;
                        LEDsoff();
                        continue;
                } else if (res == 1) {

-                       break;  //return value 1 means button press
+                       break;  // return value 1 means button press

                }
                        
                // REQ or WUP request in ANY state and WUP in HALTED state
                // this if-statement doesn't match the specification above. (iceman)
                if (len == 1 && ((receivedCmd[0] == ISO14443A_CMD_REQA && cardSTATE != MFEMUL_HALTED) || receivedCmd[0] == ISO14443A_CMD_WUPA)) {
                        selTimer = GetTickCount();
                }
                        
                // REQ or WUP request in ANY state and WUP in HALTED state
                // this if-statement doesn't match the specification above. (iceman)
                if (len == 1 && ((receivedCmd[0] == ISO14443A_CMD_REQA && cardSTATE != MFEMUL_HALTED) || receivedCmd[0] == ISO14443A_CMD_WUPA)) {
                        selTimer = GetTickCount();

-                       EmSendCmdEx(atqa, sizeof(atqa), (receivedCmd[0] == ISO14443A_CMD_WUPA));
+                       EmSendCmd(atqa, sizeof(atqa));

                        cardSTATE = MFEMUL_SELECT1;
                        crypto1_destroy(pcs);
                        cardAUTHKEY = 0xff;
                        LEDsoff();
                        cardSTATE = MFEMUL_SELECT1;
                        crypto1_destroy(pcs);
                        cardAUTHKEY = 0xff;
                        LEDsoff();

-                       nonce++; 
+                       nonce = prand(); 

                        continue;
                }
                
                        continue;
                }
                


@@ -2646,46 +2696,92 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                                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);
 

-                               //Collect AR/NR
-                               //if(ar_nr_collected < 2 && cardAUTHSC == 2){
-                               if(ar_nr_collected < 2) {                                       
-                                       //if(ar_nr_responses[2] != nr) {
-                                               ar_nr_responses[ar_nr_collected*4]   = cuid;
-                                               ar_nr_responses[ar_nr_collected*4+1] = nonce;
-                                               ar_nr_responses[ar_nr_collected*4+2] = nr;
-                                               ar_nr_responses[ar_nr_collected*4+3] = ar;
-                                               ar_nr_collected++;
-                                       //}                                     
-               
-                                       // Interactive mode flag, means we need to send ACK
-                                       finished = ( ((flags & FLAG_INTERACTIVE) == FLAG_INTERACTIVE)&& ar_nr_collected == 2);
+                               // Collect AR/NR per keytype & sector
+                               if ( (flags & FLAG_NR_AR_ATTACK) == FLAG_NR_AR_ATTACK ) {
+                                       
+                                       int8_t index = -1;
+                                       int8_t empty = -1;
+                                       for (uint8_t i = 0; i < ATTACK_KEY_COUNT; i++) {
+                                               // find which index to use
+                                               if ( (cardAUTHSC == ar_nr_nonces[i].sector) &&  (cardAUTHKEY == ar_nr_nonces[i].keytype)) 
+                                                       index = i;
+
+                                               // keep track of empty slots.
+                                               if ( ar_nr_nonces[i].state == EMPTY)
+                                                       empty = i;
+                                       }
+                                       // if no empty slots.  Choose first and overwrite.
+                                       if ( index == -1 ) {
+                                               if ( empty == -1 ) {
+                                                       index = 0;
+                                                       ar_nr_nonces[index].state = EMPTY;
+                                               } else {
+                                                       index = empty;
+                                               }
+                                       }
+
+                                       switch(ar_nr_nonces[index].state) {
+                                               case EMPTY: {
+                                                       // first nonce collect
+                                                       ar_nr_nonces[index].cuid = cuid;
+                                                       ar_nr_nonces[index].sector = cardAUTHSC;
+                                                       ar_nr_nonces[index].keytype = cardAUTHKEY;
+                                                       ar_nr_nonces[index].nonce = nonce;
+                                                       ar_nr_nonces[index].nr = nr;
+                                                       ar_nr_nonces[index].ar = ar;
+                                                       ar_nr_nonces[index].state = FIRST;
+                                                       break;
+                                               } 
+                                               case FIRST : { 
+                                                       // second nonce collect
+                                                       ar_nr_nonces[index].nonce2 = nonce;
+                                                       ar_nr_nonces[index].nr2 = nr;
+                                                       ar_nr_nonces[index].ar2 = ar;
+                                                       ar_nr_nonces[index].state = SECOND;
+
+                                                       // send to client
+                                                       cmd_send(CMD_ACK, CMD_SIMULATE_MIFARE_CARD, 0, 0, &ar_nr_nonces[index], sizeof(nonces_t));
+                                                       
+                                                       ar_nr_nonces[index].state = EMPTY;
+                                                       ar_nr_nonces[index].sector = 0;
+                                                       ar_nr_nonces[index].keytype = 0;
+                                                       break;
+                                               }
+                                               default: break;
+                                       }

                                }
                                }

-                               /*
-                               crypto1_word(pcs, ar , 1);
-                               cardRr = nr ^ crypto1_word(pcs, 0, 0);
+
+                               crypto1_word(pcs, nr , 1);
+                               uint32_t cardRr = ar ^ crypto1_word(pcs, 0, 0);

                                
                                

-                               test if auth OK
+                               //test if auth OK

                                if (cardRr != prng_successor(nonce, 64)){
                                        
                                if (cardRr != prng_successor(nonce, 64)){
                                        

-                                       if (MF_DBGLEVEL >= 4) Dbprintf("AUTH FAILED for sector %d with key %c. cardRr=%08x, succ=%08x",
-                                               cardAUTHSC, cardAUTHKEY == 0 ? 'A' : 'B',
-                                                       cardRr, prng_successor(nonce, 64));
-                                       Shouldn't we respond anything here?
-                                       Right now, we don't nack or anything, which causes the
-                                       reader to do a WUPA after a while. /Martin
-                                       -- which is the correct response. /piwi
+                                       if (MF_DBGLEVEL >= 3) {
+                                               Dbprintf("AUTH FAILED for sector %d with key %c. [nr=%08x  cardRr=%08x] [nt=%08x succ=%08x]"
+                                                       , cardAUTHSC
+                                                       , (cardAUTHKEY == 0) ? 'A' : 'B'
+                                                       , nr
+                                                       , cardRr
+                                                       , nonce // nt
+                                                       , prng_successor(nonce, 64)
+                                               );
+                                       }
+                                       // Shouldn't we respond anything here?
+                                       // Right now, we don't nack or anything, which causes the
+                                       // reader to do a WUPA after a while. /Martin
+                                       // -- which is the correct response. /piwi

                                        cardSTATE_TO_IDLE();
                                        LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
                                        break;
                                }
                                        cardSTATE_TO_IDLE();
                                        LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
                                        break;
                                }

-                               */

                                
                                ans = prng_successor(nonce, 96) ^ crypto1_word(pcs, 0, 0);
                                num_to_bytes(ans, 4, rAUTH_AT);
                                EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
                                LED_C_ON();
                                
                                
                                ans = prng_successor(nonce, 96) ^ crypto1_word(pcs, 0, 0);
                                num_to_bytes(ans, 4, rAUTH_AT);
                                EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
                                LED_C_ON();
                                

-                               if (MF_DBGLEVEL >= 4) {
+                               if (MF_DBGLEVEL >= 1) {

                                        Dbprintf("AUTH COMPLETED for sector %d with key %c. time=%d", 
                                                cardAUTHSC, 
                                                cardAUTHKEY == 0 ? 'A' : 'B',
                                        Dbprintf("AUTH COMPLETED for sector %d with key %c. time=%d", 
                                                cardAUTHSC, 
                                                cardAUTHKEY == 0 ? 'A' : 'B',


@@ -2709,24 +2805,24 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                                                 receivedCmd[0] == MIFARE_AUTH_KEYB)  ) {
 
                                        authTimer = GetTickCount();
                                                 receivedCmd[0] == MIFARE_AUTH_KEYB)  ) {
 
                                        authTimer = GetTickCount();

-                                       cardAUTHSC = receivedCmd[1] / 4;  // received block num
-                                       cardAUTHKEY = receivedCmd[0] - 0x60; // & 1
+                                       cardAUTHSC = receivedCmd[1] / 4;  // received block -> sector
+                                       cardAUTHKEY = receivedCmd[0] & 0x1;

                                        crypto1_destroy(pcs);
                                        crypto1_destroy(pcs);

+                                       
+                                       // load key into crypto

                                        crypto1_create(pcs, emlGetKey(cardAUTHSC, cardAUTHKEY));
 
                                        crypto1_create(pcs, emlGetKey(cardAUTHSC, cardAUTHKEY));
 

-                                       if (!encrypted_data) { 
+                                       if (!encrypted_data) {

                                                // first authentication
                                                // first authentication

-                                               crypto1_word(pcs, cuid ^ nonce, 0);//Update crypto state
-                                               num_to_bytes(nonce, 4, rAUTH_AT); // Send nonce
-                                               
-                                               if (MF_DBGLEVEL >= 4) Dbprintf("Reader authenticating for block %d (0x%02x) with key %d",receivedCmd[1] ,receivedCmd[1],cardAUTHKEY  );
-
+                                               // Update crypto state init  (UID ^ NONCE)
+                                               crypto1_word(pcs, cuid ^ nonce, 0);
+                                               num_to_bytes(nonce, 4, rAUTH_AT);

                                        } else {
                                                // nested authentication
                                                ans = nonce ^ crypto1_word(pcs, cuid ^ nonce, 0); 
                                                num_to_bytes(ans, 4, rAUTH_AT);
 
                                        } else {
                                                // nested authentication
                                                ans = nonce ^ crypto1_word(pcs, cuid ^ nonce, 0); 
                                                num_to_bytes(ans, 4, rAUTH_AT);
 

-                                               if (MF_DBGLEVEL >= 4) Dbprintf("Reader doing nested authentication for block %d (0x%02x) with key %d",receivedCmd[1] ,receivedCmd[1],cardAUTHKEY );
+                                               if (MF_DBGLEVEL >= 3) Dbprintf("Reader doing nested authentication for block %d (0x%02x) with key %c", receivedCmd[1], receivedCmd[1],  cardAUTHKEY == 0 ? 'A' : 'B');

                                        }
 
                                        EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
                                        }
 
                                        EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));


@@ -2894,41 +2990,10 @@ 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) == FLAG_INTERACTIVE) {
-               //May just aswell send the collected ar_nr in the response aswell
-               uint8_t len = ar_nr_collected * 4 * 4;
-               cmd_send(CMD_ACK, CMD_SIMULATE_MIFARE_CARD, len, 0, &ar_nr_responses, len);
-       }
-
-       if( ((flags & FLAG_NR_AR_ATTACK) == FLAG_NR_AR_ATTACK ) && MF_DBGLEVEL >= 1 ) {
-               if(ar_nr_collected > 1 ) {
-                       Dbprintf("Collected two pairs of AR/NR which can be used to extract keys from reader:");
-                       Dbprintf("../tools/mfkey/mfkey32v2.exe %08x %08x %08x %08x %08x %08x %08x",
-                                       ar_nr_responses[0], // CUID
-                                       ar_nr_responses[1], // NT1
-                                       ar_nr_responses[2], // NR1
-                                       ar_nr_responses[3], // AR1
-                                       //ar_nr_responses[4], // CUID2
-                                       ar_nr_responses[5],  // NT2
-                                       ar_nr_responses[6], // NR2
-                                       ar_nr_responses[7]  // AR2
-                               );
-               } else {
-                       Dbprintf("Failed to obtain two AR/NR pairs!");
-                       if(ar_nr_collected == 1 ) {
-                               Dbprintf("Only got these: UID=%08x, nonce=%08x, NR1=%08x, AR1=%08x",
-                                               ar_nr_responses[0], // CUID
-                                               ar_nr_responses[1], // NT
-                                               ar_nr_responses[2], // NR1
-                                               ar_nr_responses[3]  // AR1
-                                       );
-                       }
-               }
-       }
-       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());

        
        

-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       cmd_send(CMD_ACK,1,0,0,0,0);    FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

        LEDsoff();
        set_tracing(FALSE);
 }
        LEDsoff();
        set_tracing(FALSE);
 }