]> cvs.zerfleddert.de Git - proxmark3-svn/commitdiff
fix hf mf sim (issue #412) (#419)
authorpwpiwi <pwpiwi@users.noreply.github.com>
Fri, 20 Oct 2017 15:55:13 +0000 (17:55 +0200)
committerGitHub <noreply@github.com>
Fri, 20 Oct 2017 15:55:13 +0000 (17:55 +0200)
* move to separate files mifaresim.[ch]
* check CRC of commands
* don't execute commands without successfull authentication
* ensure correct timing of REQA, WUPA, ANTICOL and SELECT responses
* trace reader commands immediately, only fix start time after tag response. Decreases time to be ready for next reader command.
* remove iso14443-4 remnants
* trace raw reader commands instead of decrypted ones
* some refactoring

* fix hf mf sim
* timing: decrease time to get ready for new reader commands

armsrc/BigBuf.c
armsrc/BigBuf.h
armsrc/Makefile
armsrc/apps.h
armsrc/iclass.c
armsrc/iso14443a.c
armsrc/iso14443a.h
armsrc/mifaresim.c [new file with mode: 0644]
armsrc/mifaresim.h [new file with mode: 0644]
armsrc/mifareutil.c
armsrc/mifareutil.h

index 8870f426fa2b05d46ebe2fa57c374183c7d0a3ab..4fe97b462d2fdd63e458a10da1251c435651ca65 100644 (file)
@@ -136,6 +136,10 @@ void set_tracing(bool enable) {
        tracing = enable;
 }
 
+bool get_tracing(void) {
+       return tracing;
+}
+
 /**
  * Get the number of bytes traced
  * @return
index 6a052dca152462d1ef6718e160c30473e5cd9d46..0553804444d39f269e9b0422751522737de7f994 100644 (file)
@@ -37,6 +37,7 @@ extern void BigBuf_print_status(void);
 extern uint16_t BigBuf_get_traceLen(void);
 extern void clear_trace(void);
 extern void set_tracing(bool enable);
+extern bool get_tracing(void);
 extern bool RAMFUNC LogTrace(const uint8_t *btBytes, uint16_t iLen, uint32_t timestamp_start, uint32_t timestamp_end, uint8_t *parity, bool readerToTag);
 extern int LogTraceHitag(const uint8_t * btBytes, int iBits, int iSamples, uint32_t dwParity, int bReader);
 extern uint8_t emlSet(uint8_t *data, uint32_t offset, uint32_t length);
index 861d98c666a04bbfdf01635ec8a5c16c3da503bb..dea5d06c1b499b1e4abec9bd9386838626255ea7 100644 (file)
@@ -17,7 +17,7 @@ APP_CFLAGS    = -DWITH_ISO14443a_StandAlone -DWITH_LF -DWITH_ISO15693 -DWITH_ISO144
 #SRC_LCD = fonts.c LCD.c
 SRC_LF = lfops.c hitag2.c hitagS.c lfsampling.c pcf7931.c lfdemod.c protocols.c
 SRC_ISO15693 = iso15693.c iso15693tools.c
-SRC_ISO14443a = epa.c iso14443a.c mifareutil.c mifarecmd.c mifaresniff.c
+SRC_ISO14443a = epa.c iso14443a.c mifareutil.c mifarecmd.c mifaresniff.c mifaresim.c
 SRC_ISO14443b = iso14443b.c
 SRC_CRAPTO1 = crypto1.c des.c
 SRC_CRC = iso14443crc.c crc.c crc16.c crc32.c parity.c
index b00701480b4ef5e8d5bd93d0e02ce665917cf7e2..542e6b90c98d0e00857e2caccc0272d1e22a6a43 100644 (file)
@@ -99,14 +99,9 @@ void ReadSTMemoryIso14443b(uint32_t);
 void RAMFUNC SnoopIso14443b(void);
 void SendRawCommand14443B(uint32_t, uint32_t, uint8_t, uint8_t[]);
 
-/// iso14443a.h
-void RAMFUNC SnoopIso14443a(uint8_t param);
-void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data);
-void ReaderIso14443a(UsbCommand * c);
 // Also used in iclass.c
 bool RAMFUNC LogTrace(const uint8_t *btBytes, uint16_t len, uint32_t timestamp_start, uint32_t timestamp_end, uint8_t *parity, bool readerToTag);
 void GetParity(const uint8_t *pbtCmd, uint16_t len, uint8_t *parity);
-void iso14a_set_trigger(bool enable);
 
 void RAMFUNC SniffMifare(uint8_t param);
 
@@ -115,8 +110,6 @@ void EPA_PACE_Collect_Nonce(UsbCommand * c);
 void EPA_PACE_Replay(UsbCommand *c);
 
 // mifarecmd.h
-void ReaderMifare(bool first_try);
-int32_t dist_nt(uint32_t nt1, uint32_t nt2);
 void MifareReadBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *data);
 void MifareUReadBlock(uint8_t arg0, uint8_t arg1, uint8_t *datain);
 void MifareUC_Auth(uint8_t arg0, uint8_t *datain);
index 32f9594b60926da854d902e458d52622d0ec3d24..f9aedc9577f17a89c36b9b56d82459b6e8c93f75 100644 (file)
@@ -42,6 +42,7 @@
 #include "string.h"
 #include "common.h"
 #include "cmd.h"
+#include "iso14443a.h"
 // Needed for CRC in emulation mode;
 // same construction as in ISO 14443;
 // different initial value (CRC_ICLASS)
index e9ad25355b4c498c46c2f5f8fe6c1a534df2e66b..a336703606e95dcf99169b2ac7f1695c93f03806 100644 (file)
@@ -132,13 +132,13 @@ uint16_t FpgaSendQueueDelay;
 #define DELAY_FPGA_QUEUE (FpgaSendQueueDelay<<1)
 
 // When the PM acts as tag and is sending, it takes
-// 4*16 ticks until we can write data to the sending hold register
+// 4*16 + 8 ticks until we can write data to the sending hold register
 // 8*16 ticks until the SHR is transferred to the Sending Shift Register
-// 8 ticks until the first transfer starts
-// 8 ticks later the FPGA samples the data
-// + a varying number of ticks in the FPGA Delay Queue (mod_sig_buf)
+// 8 ticks later the FPGA samples the first data
+// + 16 ticks until assigned to mod_sig
 // + 1 tick to assign mod_sig_coil
-#define DELAY_ARM2AIR_AS_TAG (4*16 + 8*16 + 8 + 8 + DELAY_FPGA_QUEUE + 1)
+// + a varying number of ticks in the FPGA Delay Queue (mod_sig_buf)
+#define DELAY_ARM2AIR_AS_TAG (4*16 + 8 + 8*16 + 8 + 16 + 1 + DELAY_FPGA_QUEUE)
 
 // When the PM acts as sniffer and is receiving tag data, it takes
 // 3 ticks A/D conversion
@@ -185,13 +185,13 @@ void iso14a_set_trigger(bool enable) {
 }
 
 
-void iso14a_set_timeout(uint32_t timeout) {
+static void iso14a_set_timeout(uint32_t timeout) {
        iso14a_timeout = timeout;
        if(MF_DBGLEVEL >= 3) Dbprintf("ISO14443A Timeout set to %ld (%dms)", iso14a_timeout, iso14a_timeout / 106);
 }
 
 
-void iso14a_set_ATS_timeout(uint8_t *ats) {
+static void iso14a_set_ATS_timeout(uint8_t *ats) {
 
        uint8_t tb1;
        uint8_t fwi; 
@@ -246,7 +246,7 @@ void AppendCrc14443a(uint8_t* data, int len)
        ComputeCrc14443(CRC_14443_A,data,len,data+len,data+len+1);
 }
 
-void AppendCrc14443b(uint8_t* data, int len)
+static void AppendCrc14443b(uint8_t* data, int len)
 {
        ComputeCrc14443(CRC_14443_B,data,len,data+len,data+len+1);
 }
@@ -283,7 +283,7 @@ const bool Mod_Miller_LUT[] = {
 #define IsMillerModulationNibble1(b) (Mod_Miller_LUT[(b & 0x000000F0) >> 4])
 #define IsMillerModulationNibble2(b) (Mod_Miller_LUT[(b & 0x0000000F)])
 
-void UartReset()
+static void UartReset()
 {
        Uart.state = STATE_UNSYNCD;
        Uart.bitCount = 0;
@@ -295,7 +295,7 @@ void UartReset()
        Uart.endTime = 0;
 }
 
-void UartInit(uint8_t *data, uint8_t *parity)
+static void UartInit(uint8_t *data, uint8_t *parity)
 {
        Uart.output = data;
        Uart.parity = parity;
@@ -455,7 +455,7 @@ const bool Mod_Manchester_LUT[] = {
 #define IsManchesterModulationNibble2(b) (Mod_Manchester_LUT[(b & 0x000F)])
 
 
-void DemodReset()
+static void DemodReset()
 {
        Demod.state = DEMOD_UNSYNCD;
        Demod.len = 0;                                          // number of decoded data bytes
@@ -469,7 +469,7 @@ void DemodReset()
        Demod.endTime = 0;
 }
 
-void DemodInit(uint8_t *data, uint8_t *parity)
+static void DemodInit(uint8_t *data, uint8_t *parity)
 {
        Demod.output = data;
        Demod.parity = parity;
@@ -793,14 +793,6 @@ static void CodeIso14443aAsTagPar(const uint8_t *cmd, uint16_t len, uint8_t *par
        ToSendMax++;
 }
 
-static void CodeIso14443aAsTag(const uint8_t *cmd, uint16_t len)
-{
-       uint8_t par[MAX_PARITY_SIZE];
-       
-       GetParity(cmd, len, par);
-       CodeIso14443aAsTagPar(cmd, len, par);
-}
-
 
 static void Code4bitAnswerAsTag(uint8_t cmd)
 {
@@ -840,6 +832,38 @@ static void Code4bitAnswerAsTag(uint8_t cmd)
        ToSendMax++;
 }
 
+
+static uint8_t *LastReaderTraceTime = NULL;
+
+static void EmLogTraceReader(void) {
+       // remember last reader trace start to fix timing info later
+       LastReaderTraceTime = BigBuf_get_addr() + BigBuf_get_traceLen();
+       LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
+}
+
+
+static void FixLastReaderTraceTime(uint32_t tag_StartTime) {
+       uint32_t reader_EndTime = Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG;
+       uint32_t reader_StartTime = Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG;
+       uint16_t reader_modlen = reader_EndTime - reader_StartTime;
+       uint16_t approx_fdt = tag_StartTime - reader_EndTime;
+       uint16_t exact_fdt = (approx_fdt - 20 + 32)/64 * 64 + 20;
+       reader_StartTime = tag_StartTime - exact_fdt - reader_modlen;
+       LastReaderTraceTime[0] = (reader_StartTime >> 0) & 0xff;
+       LastReaderTraceTime[1] = (reader_StartTime >> 8) & 0xff;
+       LastReaderTraceTime[2] = (reader_StartTime >> 16) & 0xff;
+       LastReaderTraceTime[3] = (reader_StartTime >> 24) & 0xff;
+}
+
+       
+static void EmLogTraceTag(uint8_t *tag_data, uint16_t tag_len, uint8_t *tag_Parity, uint32_t ProxToAirDuration) {
+       uint32_t tag_StartTime = LastTimeProxToAirStart*16 + DELAY_ARM2AIR_AS_TAG;
+       uint32_t tag_EndTime = (LastTimeProxToAirStart + ProxToAirDuration)*16 + DELAY_ARM2AIR_AS_TAG;
+       LogTrace(tag_data, tag_len, tag_StartTime, tag_EndTime, tag_Parity, false);
+       FixLastReaderTraceTime(tag_StartTime);
+}
+
+
 //-----------------------------------------------------------------------------
 // Wait for commands from reader
 // Stop when button is pressed
@@ -868,33 +892,22 @@ static int GetIso14443aCommandFromReader(uint8_t *received, uint8_t *parity, int
             b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
                        if(MillerDecoding(b, 0)) {
                                *len = Uart.len;
+                               EmLogTraceReader();
                                return true;
                        }
                }
     }
 }
 
-static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNeeded);
-int EmSend4bitEx(uint8_t resp, bool correctionNeeded);
+
+static int EmSend4bitEx(uint8_t resp, bool correctionNeeded);
 int EmSend4bit(uint8_t resp);
-int EmSendCmdExPar(uint8_t *resp, uint16_t respLen, bool correctionNeeded, uint8_t *par);
+static int EmSendCmdExPar(uint8_t *resp, uint16_t respLen, bool correctionNeeded, uint8_t *par);
 int EmSendCmdEx(uint8_t *resp, uint16_t respLen, bool correctionNeeded);
-int EmSendCmd(uint8_t *resp, uint16_t respLen);
-int EmSendCmdPar(uint8_t *resp, uint16_t respLen, uint8_t *par);
-bool EmLogTrace(uint8_t *reader_data, uint16_t reader_len, uint32_t reader_StartTime, uint32_t reader_EndTime, uint8_t *reader_Parity,
-                                uint8_t *tag_data, uint16_t tag_len, uint32_t tag_StartTime, uint32_t tag_EndTime, uint8_t *tag_Parity);
+int EmSendPrecompiledCmd(tag_response_info_t *response_info, bool correctionNeeded);
 
-static uint8_t* free_buffer_pointer;
 
-typedef struct {
-  uint8_t* response;
-  size_t   response_n;
-  uint8_t* modulation;
-  size_t   modulation_n;
-  uint32_t ProxToAirDuration;
-} tag_response_info_t;
-
-bool prepare_tag_modulation(tag_response_info_t* response_info, size_t max_buffer_size) {
+static bool prepare_tag_modulation(tag_response_info_t* response_info, size_t max_buffer_size) {
        // Example response, answer to MIFARE Classic read block will be 16 bytes + 2 CRC = 18 bytes
        // This will need the following byte array for a modulation sequence
        //    144        data bits (18 * 8)
@@ -908,17 +921,18 @@ bool prepare_tag_modulation(tag_response_info_t* response_info, size_t max_buffe
  
  
   // Prepare the tag modulation bits from the message
-  CodeIso14443aAsTag(response_info->response,response_info->response_n);
+  GetParity(response_info->response, response_info->response_n, &(response_info->par));
+  CodeIso14443aAsTagPar(response_info->response,response_info->response_n, &(response_info->par));
   
   // Make sure we do not exceed the free buffer space
   if (ToSendMax > max_buffer_size) {
     Dbprintf("Out of memory, when modulating bits for tag answer:");
-    Dbhexdump(response_info->response_n,response_info->response,false);
+    Dbhexdump(response_info->response_n, response_info->response, false);
     return false;
   }
   
   // Copy the byte array, used for this modulation to the buffer position
-  memcpy(response_info->modulation,ToSend,ToSendMax);
+  memcpy(response_info->modulation, ToSend, ToSendMax);
   
   // Store the number of bytes that were used for encoding/modulation and the time needed to transfer them
   response_info->modulation_n = ToSendMax;
@@ -930,21 +944,20 @@ bool prepare_tag_modulation(tag_response_info_t* response_info, size_t max_buffe
 
 // "precompile" responses. There are 7 predefined responses with a total of 28 bytes data to transmit.
 // Coded responses need one byte per bit to transfer (data, parity, start, stop, correction) 
-// 28 * 8 data bits, 28 * 1 parity bits, 7 start bits, 7 stop bits, 7 correction bits
+// 28 * 8 data bits, 28 * 1 parity bits, 7 start bits, 7 stop bits, 7 correction bits for the modulation
 // -> need 273 bytes buffer
 #define ALLOCATED_TAG_MODULATION_BUFFER_SIZE 273
 
-bool prepare_allocated_tag_modulation(tag_response_info_t* response_info) {
+bool prepare_allocated_tag_modulation(tag_response_info_t* response_info, uint8_t **buffer, size_t *max_buffer_size) {
+
   // Retrieve and store the current buffer index
-  response_info->modulation = free_buffer_pointer;
-  
-  // Determine the maximum size we can use from our buffer
-  size_t max_buffer_size = ALLOCATED_TAG_MODULATION_BUFFER_SIZE;
+  response_info->modulation = *buffer;
   
   // Forward the prepare tag modulation function to the inner function
-  if (prepare_tag_modulation(response_info, max_buffer_size)) {
-    // Update the free buffer offset
-    free_buffer_pointer += ToSendMax;
+  if (prepare_tag_modulation(response_info, *max_buffer_size)) {
+    // Update the free buffer offset and the remaining buffer size
+    *buffer += ToSendMax;
+       *max_buffer_size -= ToSendMax;
     return true;
   } else {
     return false;
@@ -1074,8 +1087,8 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
        // allocate buffers:
        uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE);
        uint8_t *receivedCmdPar = BigBuf_malloc(MAX_PARITY_SIZE);
-       free_buffer_pointer = BigBuf_malloc(ALLOCATED_TAG_MODULATION_BUFFER_SIZE);
-
+       uint8_t *free_buffer_pointer = BigBuf_malloc(ALLOCATED_TAG_MODULATION_BUFFER_SIZE);
+       size_t free_buffer_size = ALLOCATED_TAG_MODULATION_BUFFER_SIZE;
        // clear trace
        clear_trace();
        set_tracing(true);
@@ -1083,7 +1096,7 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
        // Prepare the responses of the anticollision phase
        // there will be not enough time to do this at the moment the reader sends it REQA
        for (size_t i=0; i<TAG_RESPONSE_COUNT; i++) {
-               prepare_allocated_tag_modulation(&responses[i]);
+               prepare_allocated_tag_modulation(&responses[i], &free_buffer_pointer, &free_buffer_size);
        }
 
        int len = 0;
@@ -1130,10 +1143,6 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
                        // We already responded, do not send anything with the EmSendCmd14443aRaw() that is called below
                        p_response = NULL;
                } else if(receivedCmd[0] == 0x50) {     // Received a HALT
-
-                       if (tracing) {
-                               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] == 0x60 || receivedCmd[0] == 0x61) {   // Received an authentication request
                        p_response = &responses[5]; order = 7;
@@ -1145,9 +1154,6 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
                                p_response = &responses[6]; order = 70;
                        }
                } else if (order == 7 && len == 8) { // Received {nr] and {ar} (part of authentication)
-                       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 nr = bytes_to_num(receivedCmd,4);
                        uint32_t ar = bytes_to_num(receivedCmd+4,4);
                        Dbprintf("Auth attempt {nr}{ar}: %08x %08x",nr,ar);
@@ -1189,9 +1195,6 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
 
                                default: {
                                        // Never seen this command before
-                                       if (tracing) {
-                                               LogTrace(receivedCmd, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                                       }
                                        Dbprintf("Received unknown command (len=%d):",len);
                                        Dbhexdump(len,receivedCmd,false);
                                        // Do not respond
@@ -1209,9 +1212,6 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
         
                                if (prepare_tag_modulation(&dynamic_response_info,DYNAMIC_MODULATION_BUFFER_SIZE) == false) {
                                        Dbprintf("Error preparing tag response");
-                                       if (tracing) {
-                                               LogTrace(receivedCmd, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                                       }
                                        break;
                                }
                                p_response = &dynamic_response_info;
@@ -1231,21 +1231,7 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
                cmdsRecvd++;
 
                if (p_response != NULL) {
-                       EmSendCmd14443aRaw(p_response->modulation, p_response->modulation_n, receivedCmd[0] == 0x52);
-                       // do the tracing for the previous reader request and this tag answer:
-                       uint8_t par[MAX_PARITY_SIZE];
-                       GetParity(p_response->response, p_response->response_n, par);
-       
-                       EmLogTrace(Uart.output, 
-                                               Uart.len, 
-                                               Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, 
-                                               Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, 
-                                               Uart.parity,
-                                               p_response->response, 
-                                               p_response->response_n,
-                                               LastTimeProxToAirStart*16 + DELAY_ARM2AIR_AS_TAG,
-                                               (LastTimeProxToAirStart + p_response->ProxToAirDuration)*16 + DELAY_ARM2AIR_AS_TAG, 
-                                               par);
+                       EmSendPrecompiledCmd(p_response, receivedCmd[0] == 0x52);
                }
                
                if (!tracing) {
@@ -1262,7 +1248,7 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
 
 // prepare a delayed transfer. This simply shifts ToSend[] by a number
 // of bits specified in the delay parameter.
-void PrepareDelayedTransfer(uint16_t delay)
+static void PrepareDelayedTransfer(uint16_t delay)
 {
        uint8_t bitmask = 0;
        uint8_t bits_to_shift = 0;
@@ -1335,7 +1321,7 @@ 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
 //-----------------------------------------------------------------------------
-void CodeIso14443aBitsAsReaderPar(const uint8_t *cmd, uint16_t bits, const uint8_t *parity)
+static void CodeIso14443aBitsAsReaderPar(const uint8_t *cmd, uint16_t bits, const uint8_t *parity)
 {
        int i, j;
        int last;
@@ -1413,21 +1399,13 @@ void CodeIso14443aBitsAsReaderPar(const uint8_t *cmd, uint16_t bits, const uint8
        ToSendMax++;
 }
 
-//-----------------------------------------------------------------------------
-// Prepare reader command to send to FPGA
-//-----------------------------------------------------------------------------
-void CodeIso14443aAsReaderPar(const uint8_t *cmd, uint16_t len, const uint8_t *parity)
-{
-  CodeIso14443aBitsAsReaderPar(cmd, len*8, parity);
-}
-
 
 //-----------------------------------------------------------------------------
 // Wait for commands from reader
 // 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;
 
@@ -1485,6 +1463,7 @@ static int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity)
             b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
                        if(MillerDecoding(b, 0)) {
                                *len = Uart.len;
+                               EmLogTraceReader();
                                return 0;
                        }
         }
@@ -1497,7 +1476,6 @@ static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNe
 {
        uint8_t b;
        uint16_t i = 0;
-       uint32_t ThisTransferTime;
        
        // Modulate Manchester
        FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_MOD);
@@ -1525,10 +1503,7 @@ static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNe
                if (AT91C_BASE_SSC->SSC_RHR) break;
        }
 
-       while ((ThisTransferTime = GetCountSspClk()) & 0x00000007);
-
-       // Clear TXRDY:
-       AT91C_BASE_SSC->SSC_THR = SEC_F;
+       LastTimeProxToAirStart = (GetCountSspClk() & 0xfffffff8) + (correctionNeeded?8:0);
 
        // send cycle
        for(; i < respLen; ) {
@@ -1544,7 +1519,7 @@ static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNe
 
        // Ensure that the FPGA Delay Queue is empty before we switch to TAGSIM_LISTEN again:
        uint8_t fpga_queued_bits = FpgaSendQueueDelay >> 3;
-       for (i = 0; i <= fpga_queued_bits/8 + 1; ) {
+       for (i = 0; i < fpga_queued_bits/8; ) {
                if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
                        AT91C_BASE_SSC->SSC_THR = SEC_F;
                        FpgaSendQueueDelay = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
@@ -1552,87 +1527,60 @@ static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNe
                }
        }
 
-       LastTimeProxToAirStart = ThisTransferTime + (correctionNeeded?8:0);
-
        return 0;
 }
 
-int EmSend4bitEx(uint8_t resp, bool correctionNeeded){
+
+static int EmSend4bitEx(uint8_t resp, bool correctionNeeded){
        Code4bitAnswerAsTag(resp);
        int res = EmSendCmd14443aRaw(ToSend, ToSendMax, correctionNeeded);
        // do the tracing for the previous reader request and this tag answer:
-       uint8_t par[1];
-       GetParity(&resp, 1, par);
-       EmLogTrace(Uart.output, 
-                               Uart.len, 
-                               Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, 
-                               Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, 
-                               Uart.parity,
-                               &resp, 
-                               1, 
-                               LastTimeProxToAirStart*16 + DELAY_ARM2AIR_AS_TAG,
-                               (LastTimeProxToAirStart + LastProxToAirDuration)*16 + DELAY_ARM2AIR_AS_TAG, 
-                               par);
+       EmLogTraceTag(&resp, 1, NULL, LastProxToAirDuration);
        return res;
 }
 
+
 int EmSend4bit(uint8_t resp){
        return EmSend4bitEx(resp, false);
 }
 
-int EmSendCmdExPar(uint8_t *resp, uint16_t respLen, bool correctionNeeded, uint8_t *par){
+
+static int EmSendCmdExPar(uint8_t *resp, uint16_t respLen, bool correctionNeeded, uint8_t *par){
        CodeIso14443aAsTagPar(resp, respLen, par);
        int res = EmSendCmd14443aRaw(ToSend, ToSendMax, correctionNeeded);
        // do the tracing for the previous reader request and this tag answer:
-       EmLogTrace(Uart.output, 
-                               Uart.len, 
-                               Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, 
-                               Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, 
-                               Uart.parity,
-                               resp, 
-                               respLen, 
-                               LastTimeProxToAirStart*16 + DELAY_ARM2AIR_AS_TAG,
-                               (LastTimeProxToAirStart + LastProxToAirDuration)*16 + DELAY_ARM2AIR_AS_TAG, 
-                               par);
+       EmLogTraceTag(resp, respLen, par, LastProxToAirDuration);
        return res;
 }
 
+
 int EmSendCmdEx(uint8_t *resp, uint16_t respLen, bool correctionNeeded){
        uint8_t par[MAX_PARITY_SIZE];
        GetParity(resp, respLen, par);
        return EmSendCmdExPar(resp, respLen, correctionNeeded, par);
 }
 
+
 int EmSendCmd(uint8_t *resp, uint16_t respLen){
        uint8_t par[MAX_PARITY_SIZE];
        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);
 }
 
-bool EmLogTrace(uint8_t *reader_data, uint16_t reader_len, uint32_t reader_StartTime, uint32_t reader_EndTime, uint8_t *reader_Parity,
-                                uint8_t *tag_data, uint16_t tag_len, uint32_t tag_StartTime, uint32_t tag_EndTime, uint8_t *tag_Parity)
-{
-       if (tracing) {
-               // we cannot exactly measure the end and start of a received command from reader. However we know that the delay from
-               // end of the received command to start of the tag's (simulated by us) answer is n*128+20 or n*128+84 resp.
-               // with n >= 9. The start of the tags answer can be measured and therefore the end of the received command be calculated:
-               uint16_t reader_modlen = reader_EndTime - reader_StartTime;
-               uint16_t approx_fdt = tag_StartTime - reader_EndTime;
-               uint16_t exact_fdt = (approx_fdt - 20 + 32)/64 * 64 + 20;
-               reader_EndTime = tag_StartTime - exact_fdt;
-               reader_StartTime = reader_EndTime - reader_modlen;
-               if (!LogTrace(reader_data, reader_len, reader_StartTime, reader_EndTime, reader_Parity, true)) {
-                       return false;
-               } else return(!LogTrace(tag_data, tag_len, tag_StartTime, tag_EndTime, tag_Parity, false));
-       } else {
-               return true;
-       }
+
+int EmSendPrecompiledCmd(tag_response_info_t *response_info, bool correctionNeeded) {
+       int ret = EmSendCmd14443aRaw(response_info->modulation, response_info->modulation_n, correctionNeeded);
+       // do the tracing for the previous reader request and this tag answer:
+       EmLogTraceTag(response_info->response, response_info->response_n, &(response_info->par), response_info->ProxToAirDuration);
+       return ret;
 }
 
+
 //-----------------------------------------------------------------------------
 // Wait a certain time for tag response
 //  If a response is captured return true
@@ -1693,7 +1641,7 @@ void ReaderTransmitPar(uint8_t* frame, uint16_t len, uint8_t *par, uint32_t *tim
 }
 
 
-void ReaderTransmitBits(uint8_t* frame, uint16_t len, uint32_t *timing)
+static void ReaderTransmitBits(uint8_t* frame, uint16_t len, uint32_t *timing)
 {
   // Generate parity and redirect
   uint8_t par[MAX_PARITY_SIZE];
@@ -1710,7 +1658,8 @@ void ReaderTransmit(uint8_t* frame, uint16_t len, uint32_t *timing)
   ReaderTransmitBitsPar(frame, len*8, par, timing);
 }
 
-int ReaderReceiveOffset(uint8_t* receivedAnswer, uint16_t offset, uint8_t *parity)
+
+static int ReaderReceiveOffset(uint8_t* receivedAnswer, uint16_t offset, uint8_t *parity)
 {
        if (!GetIso14443aAnswerFromTag(receivedAnswer, parity, offset)) return false;
        if (tracing) {
@@ -1719,6 +1668,7 @@ int ReaderReceiveOffset(uint8_t* receivedAnswer, uint16_t offset, uint8_t *parit
        return Demod.len;
 }
 
+
 int ReaderReceive(uint8_t *receivedAnswer, uint8_t *parity)
 {
        if (!GetIso14443aAnswerFromTag(receivedAnswer, parity, 0)) return false;
@@ -1890,6 +1840,7 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u
        return 1;       
 }
 
+
 void iso14443a_setup(uint8_t fpga_minor_mode) {
        FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
        // Set up the synchronous serial port
@@ -1912,9 +1863,10 @@ void iso14443a_setup(uint8_t fpga_minor_mode) {
        DemodReset();
        UartReset();
        NextTransferTime = 2*DELAY_ARM2AIR_AS_READER;
-       iso14a_set_timeout(1050); // 10ms default
+       iso14a_set_timeout(1060); // 10ms default
 }
 
+
 int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data) {
        uint8_t parity[MAX_PARITY_SIZE];
        uint8_t real_cmd[cmd_len+4];
@@ -1943,6 +1895,7 @@ int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data) {
        return len;
 }
 
+
 //-----------------------------------------------------------------------------
 // Read an ISO 14443a tag. Send out commands and store answers.
 //
@@ -2041,7 +1994,7 @@ void ReaderIso14443a(UsbCommand *c)
 // Determine the distance between two nonces.
 // Assume that the difference is small, but we don't know which is first.
 // Therefore try in alternating directions.
-int32_t dist_nt(uint32_t nt1, uint32_t nt2) {
+static int32_t dist_nt(uint32_t nt1, uint32_t nt2) {
 
        uint16_t i;
        uint32_t nttmp1, nttmp2;
@@ -2353,696 +2306,6 @@ void ReaderMifare(bool first_try)
        set_tracing(false);
 }
 
-/**
-  *MIFARE 1K simulate.
-  *
-  *@param flags :
-  *    FLAG_INTERACTIVE - In interactive mode, we are expected to finish the operation with an ACK
-  * FLAG_4B_UID_IN_DATA - means that there is a 4-byte UID in the data-section, we're expected to use that
-  * FLAG_7B_UID_IN_DATA - means that there is a 7-byte UID in the data-section, we're expected to use that
-  * FLAG_10B_UID_IN_DATA       - use 10-byte UID in the data-section not finished
-  *    FLAG_NR_AR_ATTACK  - means we should collect NR_AR responses for bruteforcing later
-  * FLAG_RANDOM_NONCE - means we should generate some pseudo-random nonce data (only allows moebius attack)
-  *@param exitAfterNReads, exit simulation after n blocks have been read, 0 is infinite ...
-  * (unless reader attack mode enabled then it runs util it gets enough nonces to recover all keys attmpted)
-  */
-void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *datain)
-{
-       int cardSTATE = MFEMUL_NOFIELD;
-       int _UID_LEN = 0; // 4, 7, 10
-       int vHf = 0;    // in mV
-       int res;
-       uint32_t selTimer = 0;
-       uint32_t authTimer = 0;
-       uint16_t len = 0;
-       uint8_t cardWRBL = 0;
-       uint8_t cardAUTHSC = 0;
-       uint8_t cardAUTHKEY = 0xff;  // no authentication
-       uint32_t cardRr = 0;
-       uint32_t cuid = 0;
-       //uint32_t rn_enc = 0;
-       uint32_t ans = 0;
-       uint32_t cardINTREG = 0;
-       uint8_t cardINTBLOCK = 0;
-       struct Crypto1State mpcs = {0, 0};
-       struct Crypto1State *pcs;
-       pcs = &mpcs;
-       uint32_t numReads = 0;//Counts numer of times reader read a block
-       uint8_t receivedCmd[MAX_MIFARE_FRAME_SIZE];
-       uint8_t receivedCmd_par[MAX_MIFARE_PARITY_SIZE];
-       uint8_t response[MAX_MIFARE_FRAME_SIZE];
-       uint8_t response_par[MAX_MIFARE_PARITY_SIZE];
-       
-       uint8_t rATQA[]    = {0x04, 0x00}; // Mifare classic 1k 4BUID
-       uint8_t rUIDBCC1[] = {0xde, 0xad, 0xbe, 0xaf, 0x62};
-       uint8_t rUIDBCC2[] = {0xde, 0xad, 0xbe, 0xaf, 0x62}; // !!!
-       uint8_t rUIDBCC3[] = {0xde, 0xad, 0xbe, 0xaf, 0x62};
-
-       uint8_t rSAKfinal[]= {0x08, 0xb6, 0xdd};      // mifare 1k indicated
-       uint8_t rSAK1[]    = {0x04, 0xda, 0x17};      // indicate UID not finished
-
-       uint8_t rAUTH_NT[] = {0x01, 0x02, 0x03, 0x04};
-       uint8_t rAUTH_AT[] = {0x00, 0x00, 0x00, 0x00};
-               
-       //Here, we collect UID,sector,keytype,NT,AR,NR,NT2,AR2,NR2
-       // This will be used in the reader-only attack.
-
-       //allow collecting up to 7 sets of nonces to allow recovery of up to 7 keys
-       #define ATTACK_KEY_COUNT 7 // keep same as define in cmdhfmf.c -> readerAttack() (Cannot be more than 7)
-       nonces_t ar_nr_resp[ATTACK_KEY_COUNT*2]; //*2 for 2 separate attack types (nml, moebius)
-       memset(ar_nr_resp, 0x00, sizeof(ar_nr_resp));
-
-       uint8_t ar_nr_collected[ATTACK_KEY_COUNT*2]; //*2 for 2nd attack type (moebius)
-       memset(ar_nr_collected, 0x00, sizeof(ar_nr_collected));
-       uint8_t nonce1_count = 0;
-       uint8_t nonce2_count = 0;
-       uint8_t moebius_n_count = 0;
-       bool gettingMoebius = false;
-       uint8_t mM = 0; //moebius_modifier for collection storage
-
-       // Authenticate response - nonce
-       uint32_t nonce;
-       if (flags & FLAG_RANDOM_NONCE) {
-               nonce = prand();
-       } else {
-               nonce = bytes_to_num(rAUTH_NT, 4);
-       }
-       
-       //-- Determine the UID
-       // Can be set from emulator memory, incoming data
-       // and can be 7 or 4 bytes long
-       if (flags & FLAG_4B_UID_IN_DATA)
-       {
-               // 4B uid comes from data-portion of packet
-               memcpy(rUIDBCC1,datain,4);
-               rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
-               _UID_LEN = 4;
-       } else if (flags & FLAG_7B_UID_IN_DATA) {
-               // 7B uid comes from data-portion of packet
-               memcpy(&rUIDBCC1[1],datain,3);
-               memcpy(rUIDBCC2, datain+3, 4);
-               _UID_LEN = 7;
-       } else if (flags & FLAG_10B_UID_IN_DATA) {
-               memcpy(&rUIDBCC1[1], datain,   3);
-               memcpy(&rUIDBCC2[1], datain+3, 3);
-               memcpy( rUIDBCC3,    datain+6, 4);
-               _UID_LEN = 10;
-       } else {
-               // get UID from emul memory - guess at length
-               emlGetMemBt(receivedCmd, 7, 1);
-               if (receivedCmd[0] == 0x00) {      // ---------- 4BUID
-                       emlGetMemBt(rUIDBCC1, 0, 4);
-                       _UID_LEN = 4;
-               } else {                           // ---------- 7BUID
-                       emlGetMemBt(&rUIDBCC1[1], 0, 3);
-                       emlGetMemBt(rUIDBCC2, 3, 4);
-                       _UID_LEN = 7;
-               }
-       }
-
-       switch (_UID_LEN) {
-               case 4:
-                       // save CUID
-                       cuid = bytes_to_num(rUIDBCC1, 4);
-                       // BCC
-                       rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
-                       if (MF_DBGLEVEL >= 2)   {
-                               Dbprintf("4B UID: %02x%02x%02x%02x", 
-                                       rUIDBCC1[0],
-                                       rUIDBCC1[1],
-                                       rUIDBCC1[2],
-                                       rUIDBCC1[3]
-                               );
-                       }
-                       break;
-               case 7:
-                       rATQA[0] |= 0x40;
-                       // save CUID
-                       cuid = bytes_to_num(rUIDBCC2, 4);
-                        // CascadeTag, CT
-                       rUIDBCC1[0] = 0x88;
-                       // BCC
-                       rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3]; 
-                       rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3]; 
-                       if (MF_DBGLEVEL >= 2)   {
-                               Dbprintf("7B UID: %02x %02x %02x %02x %02x %02x %02x",
-                                       rUIDBCC1[1],
-                                       rUIDBCC1[2],
-                                       rUIDBCC1[3],
-                                       rUIDBCC2[0],
-                                       rUIDBCC2[1],
-                                       rUIDBCC2[2],
-                                       rUIDBCC2[3]
-                               );
-                       }
-                       break;
-               case 10:
-                       rATQA[0] |= 0x80;
-                       //sak_10[0] &= 0xFB;                                    
-                       // save CUID
-                       cuid = bytes_to_num(rUIDBCC3, 4);
-                        // CascadeTag, CT
-                       rUIDBCC1[0] = 0x88;
-                       rUIDBCC2[0] = 0x88;
-                       // BCC
-                       rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
-                       rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3];
-                       rUIDBCC3[4] = rUIDBCC3[0] ^ rUIDBCC3[1] ^ rUIDBCC3[2] ^ rUIDBCC3[3];
-
-                       if (MF_DBGLEVEL >= 2)   {
-                               Dbprintf("10B UID: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x",
-                                       rUIDBCC1[1],
-                                       rUIDBCC1[2],
-                                       rUIDBCC1[3],
-                                       rUIDBCC2[1],
-                                       rUIDBCC2[2],
-                                       rUIDBCC2[3],
-                                       rUIDBCC3[0],
-                                       rUIDBCC3[1],
-                                       rUIDBCC3[2],
-                                       rUIDBCC3[3]
-                               );
-                       }
-                       break;
-               default: 
-                       break;
-       }
-
-       // We need to listen to the high-frequency, peak-detected path.
-       iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN);
-
-       // free eventually allocated BigBuf memory but keep Emulator Memory
-       BigBuf_free_keep_EM();
-
-       // clear trace
-       clear_trace();
-       set_tracing(true);
-
-       bool finished = false;
-       bool button_pushed = BUTTON_PRESS();
-       while (!button_pushed && !finished && !usb_poll_validate_length()) {
-               WDT_HIT();
-
-               // find reader field
-               if (cardSTATE == MFEMUL_NOFIELD) {
-                       vHf = (MAX_ADC_HF_VOLTAGE * AvgAdc(ADC_CHAN_HF)) >> 10;
-                       if (vHf > MF_MINFIELDV) {
-                               cardSTATE_TO_IDLE();
-                               LED_A_ON();
-                       }
-               }
-               if (cardSTATE == MFEMUL_NOFIELD) {
-                       button_pushed = BUTTON_PRESS();
-                       continue;
-               }
-
-               //Now, get data
-               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
-               }
-
-               // REQ or WUP request in ANY state and WUP in HALTED state
-               if (len == 1 && ((receivedCmd[0] == ISO14443A_CMD_REQA && cardSTATE != MFEMUL_HALTED) || receivedCmd[0] == ISO14443A_CMD_WUPA)) {
-                       selTimer = GetTickCount();
-                       EmSendCmdEx(rATQA, sizeof(rATQA), (receivedCmd[0] == ISO14443A_CMD_WUPA));
-                       cardSTATE = MFEMUL_SELECT1;
-
-                       // init crypto block
-                       LED_B_OFF();
-                       LED_C_OFF();
-                       crypto1_destroy(pcs);
-                       cardAUTHKEY = 0xff;
-                       if (flags & FLAG_RANDOM_NONCE) {
-                               nonce = prand();
-                       }
-                       continue;
-               }
-               
-               switch (cardSTATE) {
-                       case MFEMUL_NOFIELD:
-                       case MFEMUL_HALTED:
-                       case MFEMUL_IDLE:{
-                               LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                               break;
-                       }
-                       case MFEMUL_SELECT1:{
-                               // select all - 0x93 0x20
-                               if (len == 2 && (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && receivedCmd[1] == 0x20)) {
-                                       if (MF_DBGLEVEL >= 4)   Dbprintf("SELECT ALL received");
-                                       EmSendCmd(rUIDBCC1, sizeof(rUIDBCC1));
-                                       break;
-                               }
-
-                               // select card - 0x93 0x70 ...
-                               if (len == 9 &&
-                                               (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], rUIDBCC1, 4) == 0)) {
-                                       if (MF_DBGLEVEL >= 4) 
-                                               Dbprintf("SELECT %02x%02x%02x%02x received",receivedCmd[2],receivedCmd[3],receivedCmd[4],receivedCmd[5]);
-                                       
-                                       switch(_UID_LEN) {
-                                               case 4:
-                                                       cardSTATE = MFEMUL_WORK;
-                                                       LED_B_ON();
-                                                       if (MF_DBGLEVEL >= 4)   Dbprintf("--> WORK. anticol1 time: %d", GetTickCount() - selTimer);
-                                                       EmSendCmd(rSAKfinal, sizeof(rSAKfinal));
-                                                       break;
-                                               case 7:
-                                                       cardSTATE       = MFEMUL_SELECT2;
-                                                       EmSendCmd(rSAK1, sizeof(rSAK1));
-                                                       break;
-                                               case 10:
-                                                       cardSTATE       = MFEMUL_SELECT2;
-                                                       EmSendCmd(rSAK1, sizeof(rSAK1));
-                                                       break;
-                                               default:break;
-                                       }
-                               } else {
-                                       cardSTATE_TO_IDLE();
-                               }
-                               break;
-                       }
-                       case MFEMUL_SELECT3:{
-                               if (!len) { 
-                                       LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                                       break;
-                               }
-                               // select all cl3 - 0x97 0x20
-                               if (len == 2 && (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_3 && receivedCmd[1] == 0x20)) {
-                                       EmSendCmd(rUIDBCC3, sizeof(rUIDBCC3));
-                                       break;
-                               }
-                               // select card cl3 - 0x97 0x70
-                               if (len == 9 && 
-                                               (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_3 &&
-                                                receivedCmd[1] == 0x70 && 
-                                                memcmp(&receivedCmd[2], rUIDBCC3, 4) == 0) ) {
-
-                                       EmSendCmd(rSAKfinal, sizeof(rSAKfinal));
-                                       cardSTATE = MFEMUL_WORK;
-                                       LED_B_ON();
-                                       if (MF_DBGLEVEL >= 4)   Dbprintf("--> WORK. anticol3 time: %d", GetTickCount() - selTimer);
-                                       break;
-                               }
-                               cardSTATE_TO_IDLE();
-                               break;
-                       }
-                       case MFEMUL_AUTH1:{
-                               if( len != 8) {
-                                       cardSTATE_TO_IDLE();
-                                       LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                                       break;
-                               }
-
-                               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) {
-                                       for (uint8_t i = 0; i < ATTACK_KEY_COUNT; i++) {
-                                               if ( ar_nr_collected[i+mM]==0 || ((cardAUTHSC == ar_nr_resp[i+mM].sector) && (cardAUTHKEY == ar_nr_resp[i+mM].keytype) && (ar_nr_collected[i+mM] > 0)) ) {
-                                                       // if first auth for sector, or matches sector and keytype of previous auth
-                                                       if (ar_nr_collected[i+mM] < 2) {
-                                                               // if we haven't already collected 2 nonces for this sector
-                                                               if (ar_nr_resp[ar_nr_collected[i+mM]].ar != ar) {
-                                                                       // Avoid duplicates... probably not necessary, ar should vary. 
-                                                                       if (ar_nr_collected[i+mM]==0) {
-                                                                               // first nonce collect
-                                                                               ar_nr_resp[i+mM].cuid = cuid;
-                                                                               ar_nr_resp[i+mM].sector = cardAUTHSC;
-                                                                               ar_nr_resp[i+mM].keytype = cardAUTHKEY;
-                                                                               ar_nr_resp[i+mM].nonce = nonce;
-                                                                               ar_nr_resp[i+mM].nr = nr;
-                                                                               ar_nr_resp[i+mM].ar = ar;
-                                                                               nonce1_count++;
-                                                                               // add this nonce to first moebius nonce
-                                                                               ar_nr_resp[i+ATTACK_KEY_COUNT].cuid = cuid;
-                                                                               ar_nr_resp[i+ATTACK_KEY_COUNT].sector = cardAUTHSC;
-                                                                               ar_nr_resp[i+ATTACK_KEY_COUNT].keytype = cardAUTHKEY;
-                                                                               ar_nr_resp[i+ATTACK_KEY_COUNT].nonce = nonce;
-                                                                               ar_nr_resp[i+ATTACK_KEY_COUNT].nr = nr;
-                                                                               ar_nr_resp[i+ATTACK_KEY_COUNT].ar = ar;
-                                                                               ar_nr_collected[i+ATTACK_KEY_COUNT]++;
-                                                                       } else { // second nonce collect (std and moebius)
-                                                                               ar_nr_resp[i+mM].nonce2 = nonce;
-                                                                               ar_nr_resp[i+mM].nr2 = nr;
-                                                                               ar_nr_resp[i+mM].ar2 = ar;
-                                                                               if (!gettingMoebius) {
-                                                                                       nonce2_count++;
-                                                                                       // check if this was the last second nonce we need for std attack
-                                                                                       if ( nonce2_count == nonce1_count ) {
-                                                                                               // done collecting std test switch to moebius
-                                                                                               // first finish incrementing last sample
-                                                                                               ar_nr_collected[i+mM]++; 
-                                                                                               // switch to moebius collection
-                                                                                               gettingMoebius = true;
-                                                                                               mM = ATTACK_KEY_COUNT;
-                                                                                               if (flags & FLAG_RANDOM_NONCE) {
-                                                                                                       nonce = prand();
-                                                                                               } else {
-                                                                                                       nonce = nonce*7;
-                                                                                               }
-                                                                                               break;
-                                                                                       }
-                                                                               } else {
-                                                                                       moebius_n_count++;
-                                                                                       // if we've collected all the nonces we need - finish.
-                                                                                       if (nonce1_count == moebius_n_count) finished = true;
-                                                                               }
-                                                                       }
-                                                                       ar_nr_collected[i+mM]++;
-                                                               }
-                                                       }
-                                                       // we found right spot for this nonce stop looking
-                                                       break;
-                                               }
-                                       }
-                               }
-
-                               // --- crypto
-                               crypto1_word(pcs, nr , 1);
-                               cardRr = ar ^ crypto1_word(pcs, 0, 0);
-
-                               // test if auth OK
-                               if (cardRr != prng_successor(nonce, 64)){
-                                       if (MF_DBGLEVEL >= 2) Dbprintf("AUTH FAILED for sector %d with key %c. cardRr=%08x, succ=%08x",
-                                                       cardAUTHSC, cardAUTHKEY == 0 ? 'A' : 'B',
-                                                       cardRr, prng_successor(nonce, 64));
-                                       // 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;
-                               }
-
-                               //auth successful
-                               ans = prng_successor(nonce, 96) ^ crypto1_word(pcs, 0, 0);
-
-                               num_to_bytes(ans, 4, rAUTH_AT);
-                               // --- crypto
-                               EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
-                               LED_C_ON();
-                               cardSTATE = MFEMUL_WORK;
-                               if (MF_DBGLEVEL >= 4)   Dbprintf("AUTH COMPLETED for sector %d with key %c. time=%d", 
-                                       cardAUTHSC, cardAUTHKEY == 0 ? 'A' : 'B',
-                                       GetTickCount() - authTimer);
-                               break;
-                       }
-                       case MFEMUL_SELECT2:{
-                               if (!len) { 
-                                       LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                                       break;
-                               }       
-                               // select all cl2 - 0x95 0x20
-                               if (len == 2 && (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && receivedCmd[1] == 0x20)) {
-                                       EmSendCmd(rUIDBCC2, sizeof(rUIDBCC2));
-                                       break;
-                               }
-
-                               // select cl2 card - 0x95 0x70 xxxxxxxxxxxx
-                               if (len == 9 && 
-                                               (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], rUIDBCC2, 4) == 0)) {
-                                       switch(_UID_LEN) {
-                                               case 7:
-                                                       EmSendCmd(rSAKfinal, sizeof(rSAKfinal));
-                                                       cardSTATE = MFEMUL_WORK;
-                                                       LED_B_ON();
-                                                       if (MF_DBGLEVEL >= 4)   Dbprintf("--> WORK. anticol2 time: %d", GetTickCount() - selTimer);
-                                                       break;
-                                               case 10:
-                                                       EmSendCmd(rSAK1, sizeof(rSAK1));
-                                                       cardSTATE = MFEMUL_SELECT3;
-                                                       break;
-                                               default:break;
-                                       }
-                                       break;
-                               }
-                               
-                               // i guess there is a command). go into the work state.
-                               if (len != 4) {
-                                       LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                                       break;
-                               }
-                               cardSTATE = MFEMUL_WORK;
-                               //goto lbWORK;
-                               //intentional fall-through to the next case-stmt
-                       }
-
-                       case MFEMUL_WORK:{
-                               if (len == 0) {
-                                       LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                                       break;
-                               }
-                               
-                               bool encrypted_data = (cardAUTHKEY != 0xFF) ;
-
-                               if(encrypted_data) {
-                                       // decrypt seqence
-                                       mf_crypto1_decrypt(pcs, receivedCmd, len);
-                               }
-                               
-                               if (len == 4 && (receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61)) {
-
-                                       // if authenticating to a block that shouldn't exist - as long as we are not doing the reader attack
-                                       if (receivedCmd[1] >= 16 * 4 && !(flags & FLAG_NR_AR_ATTACK)) {
-                                               //is this the correct response to an auth on a out of range block? marshmellow
-                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                               if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate (0x%02x) on out of range block: %d (0x%02x), nacking",receivedCmd[0],receivedCmd[1],receivedCmd[1]);
-                                               break;
-                                       }
-
-                                       authTimer = GetTickCount();
-                                       cardAUTHSC = receivedCmd[1] / 4;  // received block num
-                                       cardAUTHKEY = receivedCmd[0] - 0x60;
-                                       crypto1_destroy(pcs);//Added by martin
-                                       crypto1_create(pcs, emlGetKey(cardAUTHSC, cardAUTHKEY));
-                                       //uint64_t key=emlGetKey(cardAUTHSC, cardAUTHKEY);
-                                       //Dbprintf("key: %04x%08x",(uint32_t)(key>>32)&0xFFFF,(uint32_t)(key&0xFFFFFFFF));
-
-                                       if (!encrypted_data) { // first authentication
-                                               if (MF_DBGLEVEL >= 4) Dbprintf("Reader authenticating for block %d (0x%02x) with key %d",receivedCmd[1] ,receivedCmd[1],cardAUTHKEY  );
-
-                                               crypto1_word(pcs, cuid ^ nonce, 0);//Update crypto state
-                                               num_to_bytes(nonce, 4, rAUTH_AT); // Send nonce
-                                       } else { // nested authentication
-                                               if (MF_DBGLEVEL >= 4) Dbprintf("Reader doing nested authentication for block %d (0x%02x) with key %d",receivedCmd[1] ,receivedCmd[1],cardAUTHKEY );
-                                               ans = nonce ^ crypto1_word(pcs, cuid ^ nonce, 0); 
-                                               num_to_bytes(ans, 4, rAUTH_AT);
-                                       }
-
-                                       EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
-                                       //Dbprintf("Sending rAUTH %02x%02x%02x%02x", rAUTH_AT[0],rAUTH_AT[1],rAUTH_AT[2],rAUTH_AT[3]);
-                                       cardSTATE = MFEMUL_AUTH1;
-                                       break;
-                               }
-                               
-                               // rule 13 of 7.5.3. in ISO 14443-4. chaining shall be continued
-                               // BUT... ACK --> NACK
-                               if (len == 1 && receivedCmd[0] == CARD_ACK) {
-                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                       break;
-                               }
-                               
-                               // rule 12 of 7.5.3. in ISO 14443-4. R(NAK) --> R(ACK)
-                               if (len == 1 && receivedCmd[0] == CARD_NACK_NA) {
-                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
-                                       break;
-                               }
-                               
-                               if(len != 4) {
-                                       LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                                       break;
-                               }
-
-                               if(receivedCmd[0] == 0x30 // read block
-                                               || receivedCmd[0] == 0xA0 // write block
-                                               || receivedCmd[0] == 0xC0 // inc
-                                               || receivedCmd[0] == 0xC1 // dec
-                                               || receivedCmd[0] == 0xC2 // restore
-                                               || receivedCmd[0] == 0xB0) { // transfer
-                                       if (receivedCmd[1] >= 16 * 4) {
-                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                               if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate (0x%02x) on out of range block: %d (0x%02x), nacking",receivedCmd[0],receivedCmd[1],receivedCmd[1]);
-                                               break;
-                                       }
-
-                                       if (receivedCmd[1] / 4 != cardAUTHSC) {
-                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                               if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate (0x%02x) on block (0x%02x) not authenticated for (0x%02x), nacking",receivedCmd[0],receivedCmd[1],cardAUTHSC);
-                                               break;
-                                       }
-                               }
-                               // read block
-                               if (receivedCmd[0] == 0x30) {
-                                       if (MF_DBGLEVEL >= 4) {
-                                               Dbprintf("Reader reading block %d (0x%02x)",receivedCmd[1],receivedCmd[1]);
-                                       }
-                                       emlGetMem(response, receivedCmd[1], 1);
-                                       AppendCrc14443a(response, 16);
-                                       mf_crypto1_encrypt(pcs, response, 18, response_par);
-                                       EmSendCmdPar(response, 18, response_par);
-                                       numReads++;
-                                       if(exitAfterNReads > 0 && numReads == exitAfterNReads) {
-                                               Dbprintf("%d reads done, exiting", numReads);
-                                               finished = true;
-                                       }
-                                       break;
-                               }
-                               // write block
-                               if (receivedCmd[0] == 0xA0) {
-                                       if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0xA0 write block %d (%02x)",receivedCmd[1],receivedCmd[1]);
-                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
-                                       cardSTATE = MFEMUL_WRITEBL2;
-                                       cardWRBL = receivedCmd[1];
-                                       break;
-                               }
-                               // increment, decrement, restore
-                               if (receivedCmd[0] == 0xC0 || receivedCmd[0] == 0xC1 || receivedCmd[0] == 0xC2) {
-                                       if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0x%02x inc(0xC1)/dec(0xC0)/restore(0xC2) block %d (%02x)",receivedCmd[0],receivedCmd[1],receivedCmd[1]);
-                                       if (emlCheckValBl(receivedCmd[1])) {
-                                               if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate on block, but emlCheckValBl failed, nacking");
-                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                               break;
-                                       }
-                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
-                                       if (receivedCmd[0] == 0xC1)
-                                               cardSTATE = MFEMUL_INTREG_INC;
-                                       if (receivedCmd[0] == 0xC0)
-                                               cardSTATE = MFEMUL_INTREG_DEC;
-                                       if (receivedCmd[0] == 0xC2)
-                                               cardSTATE = MFEMUL_INTREG_REST;
-                                       cardWRBL = receivedCmd[1];
-                                       break;
-                               }
-                               // transfer
-                               if (receivedCmd[0] == 0xB0) {
-                                       if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0x%02x transfer block %d (%02x)",receivedCmd[0],receivedCmd[1],receivedCmd[1]);
-                                       if (emlSetValBl(cardINTREG, cardINTBLOCK, receivedCmd[1]))
-                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                       else
-                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
-                                       break;
-                               }
-                               // halt
-                               if (receivedCmd[0] == 0x50 && receivedCmd[1] == 0x00) {
-                                       LED_B_OFF();
-                                       LED_C_OFF();
-                                       cardSTATE = MFEMUL_HALTED;
-                                       if (MF_DBGLEVEL >= 4)   Dbprintf("--> HALTED. Selected time: %d ms",  GetTickCount() - selTimer);
-                                       LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                                       break;
-                               }
-                               // RATS
-                               if (receivedCmd[0] == 0xe0) {//RATS
-                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                       break;
-                               }
-                               // command not allowed
-                               if (MF_DBGLEVEL >= 4)   Dbprintf("Received command not allowed, nacking");
-                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                               break;
-                       }
-                       case MFEMUL_WRITEBL2:{
-                               if (len == 18){
-                                       mf_crypto1_decrypt(pcs, receivedCmd, len);
-                                       emlSetMem(receivedCmd, cardWRBL, 1);
-                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
-                                       cardSTATE = MFEMUL_WORK;
-                               } else {
-                                       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;
-                       }
-                       
-                       case MFEMUL_INTREG_INC:{
-                               mf_crypto1_decrypt(pcs, receivedCmd, len);
-                               memcpy(&ans, receivedCmd, 4);
-                               if (emlGetValBl(&cardINTREG, &cardINTBLOCK, cardWRBL)) {
-                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                       cardSTATE_TO_IDLE();
-                                       break;
-                               } 
-                               LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                               cardINTREG = cardINTREG + ans;
-                               cardSTATE = MFEMUL_WORK;
-                               break;
-                       }
-                       case MFEMUL_INTREG_DEC:{
-                               mf_crypto1_decrypt(pcs, receivedCmd, len);
-                               memcpy(&ans, receivedCmd, 4);
-                               if (emlGetValBl(&cardINTREG, &cardINTBLOCK, cardWRBL)) {
-                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                       cardSTATE_TO_IDLE();
-                                       break;
-                               }
-                               LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                               cardINTREG = cardINTREG - ans;
-                               cardSTATE = MFEMUL_WORK;
-                               break;
-                       }
-                       case MFEMUL_INTREG_REST:{
-                               mf_crypto1_decrypt(pcs, receivedCmd, len);
-                               memcpy(&ans, receivedCmd, 4);
-                               if (emlGetValBl(&cardINTREG, &cardINTBLOCK, cardWRBL)) {
-                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                       cardSTATE_TO_IDLE();
-                                       break;
-                               }
-                               LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                               cardSTATE = MFEMUL_WORK;
-                               break;
-                       }
-               }
-               button_pushed = BUTTON_PRESS();
-       }
-
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-       LEDsoff();
-
-       if(flags & FLAG_NR_AR_ATTACK && MF_DBGLEVEL >= 1) {
-               for ( uint8_t   i = 0; i < ATTACK_KEY_COUNT; i++) {
-                       if (ar_nr_collected[i] == 2) {
-                               Dbprintf("Collected two pairs of AR/NR which can be used to extract %s from reader for sector %d:", (i<ATTACK_KEY_COUNT/2) ? "keyA" : "keyB", ar_nr_resp[i].sector);
-                               Dbprintf("../tools/mfkey/mfkey32 %08x %08x %08x %08x %08x %08x",
-                                               ar_nr_resp[i].cuid,  //UID
-                                               ar_nr_resp[i].nonce, //NT
-                                               ar_nr_resp[i].nr,    //NR1
-                                               ar_nr_resp[i].ar,    //AR1
-                                               ar_nr_resp[i].nr2,   //NR2
-                                               ar_nr_resp[i].ar2    //AR2
-                                               );
-                       }
-               }       
-               for ( uint8_t   i = ATTACK_KEY_COUNT; i < ATTACK_KEY_COUNT*2; i++) {
-                       if (ar_nr_collected[i] == 2) {
-                               Dbprintf("Collected two pairs of AR/NR which can be used to extract %s from reader for sector %d:", (i<ATTACK_KEY_COUNT/2) ? "keyA" : "keyB", ar_nr_resp[i].sector);
-                               Dbprintf("../tools/mfkey/mfkey32v2 %08x %08x %08x %08x %08x %08x %08x",
-                                               ar_nr_resp[i].cuid,  //UID
-                                               ar_nr_resp[i].nonce, //NT
-                                               ar_nr_resp[i].nr,    //NR1
-                                               ar_nr_resp[i].ar,    //AR1
-                                               ar_nr_resp[i].nonce2,//NT2
-                                               ar_nr_resp[i].nr2,   //NR2
-                                               ar_nr_resp[i].ar2    //AR2
-                                               );
-                       }
-               }
-       }
-       if (MF_DBGLEVEL >= 1)   Dbprintf("Emulator stopped. Tracing: %d  trace length: %d ",    tracing, BigBuf_get_traceLen());
-
-       if(flags & FLAG_INTERACTIVE) { // Interactive mode flag, means we need to send ACK
-               //Send the collected ar_nr in the response
-               cmd_send(CMD_ACK,CMD_SIMULATE_MIFARE_CARD,button_pushed,0,&ar_nr_resp,sizeof(ar_nr_resp));
-       }
-}
-
 
 //-----------------------------------------------------------------------------
 // MIFARE sniffer. 
index 9977a658777537195af5e3d4b57f165fd49393a8..8bd80510ad2557ec73e45049cc3c1e3fd84e7741 100644 (file)
 
 #include <stdint.h>
 #include <stdbool.h>
+#include "usb_cmd.h"
 #include "mifare.h"
 
+typedef struct {
+  uint8_t* response;
+  uint8_t* modulation;
+  uint16_t response_n;
+  uint16_t modulation_n;
+  uint32_t ProxToAirDuration;
+  uint8_t  par; // enough for precalculated parity of 8 Byte responses
+} tag_response_info_t;
+
 extern void GetParity(const uint8_t *pbtCmd, uint16_t len, uint8_t *par);
 extern void AppendCrc14443a(uint8_t *data, int len);
 
+extern void RAMFUNC SnoopIso14443a(uint8_t param);
+extern void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t *data);
+extern void ReaderIso14443a(UsbCommand *c);
 extern void ReaderTransmit(uint8_t *frame, uint16_t len, uint32_t *timing);
 extern void ReaderTransmitBitsPar(uint8_t *frame, uint16_t bits, uint8_t *par, uint32_t *timing);
 extern void ReaderTransmitPar(uint8_t *frame, uint16_t len, uint8_t *par, uint32_t *timing);
 extern int ReaderReceive(uint8_t *receivedAnswer, uint8_t *par);
+extern void ReaderMifare(bool first_try);
+
+extern int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity);
+extern int EmSendCmd(uint8_t *resp, uint16_t respLen);
+extern int EmSendCmdEx(uint8_t *resp, uint16_t respLen, bool correctionNeeded);
+extern int EmSend4bit(uint8_t resp);
+extern int EmSendCmdPar(uint8_t *resp, uint16_t respLen, uint8_t *par);
+extern int EmSendPrecompiledCmd(tag_response_info_t *response_info, bool correctionNeeded);
+
+extern bool prepare_allocated_tag_modulation(tag_response_info_t *response_info, uint8_t **buffer, size_t *buffer_size);
 
 extern void iso14443a_setup(uint8_t fpga_minor_mode);
 extern int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data);
diff --git a/armsrc/mifaresim.c b/armsrc/mifaresim.c
new file mode 100644 (file)
index 0000000..91f45ef
--- /dev/null
@@ -0,0 +1,620 @@
+//-----------------------------------------------------------------------------
+// Merlok - June 2011, 2012
+// Gerhard de Koning Gans - May 2008
+// Hagen Fritsch - June 2010
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// Mifare Classic Card Simulation
+//-----------------------------------------------------------------------------
+
+#include "mifaresim.h"
+#include "iso14443a.h"
+#include "iso14443crc.h"
+#include "crapto1/crapto1.h"
+#include "BigBuf.h"
+#include "string.h"
+#include "mifareutil.h"
+#include "fpgaloader.h"
+#include "proxmark3.h"
+#include "usb_cdc.h"
+#include "cmd.h"
+#include "protocols.h"
+#include "apps.h"
+
+//mifare emulator states
+#define MFEMUL_NOFIELD      0
+#define MFEMUL_IDLE         1
+#define MFEMUL_SELECT1      2
+#define MFEMUL_SELECT2      3
+#define MFEMUL_SELECT3      4
+#define MFEMUL_AUTH1        5
+#define MFEMUL_AUTH2        6
+#define MFEMUL_WORK            7
+#define MFEMUL_WRITEBL2     8
+#define MFEMUL_INTREG_INC   9
+#define MFEMUL_INTREG_DEC  10
+#define MFEMUL_INTREG_REST 11
+#define MFEMUL_HALTED      12
+
+#define cardSTATE_TO_IDLE() { cardSTATE = MFEMUL_IDLE; LED_B_OFF(); LED_C_OFF(); }
+
+
+
+static void MifareSimInit(uint8_t flags, uint8_t *datain, tag_response_info_t **responses, uint32_t *cuid, uint8_t *uid_len) {
+
+       #define TAG_RESPONSE_COUNT 5                                                            // number of precompiled responses
+       static uint8_t rATQA[]    = {0x04, 0x00};                                       // indicate Mifare classic 1k 4Byte UID
+       static uint8_t rUIDBCC1[] = {0x00, 0x00, 0x00, 0x00, 0x00};     // UID 1st cascade level
+       static uint8_t rUIDBCC2[] = {0x00, 0x00, 0x00, 0x00, 0x00};     // UID 2nd cascade level
+       static uint8_t rSAKfinal[]= {0x08, 0xb6, 0xdd};                         // mifare 1k indicated
+       static uint8_t rSAK1[]    = {0x04, 0xda, 0x17};                         // indicate UID not finished
+
+       *uid_len = 4;
+       // UID can be set from emulator memory or incoming data and can be 4 or 7 bytes long
+       if (flags & FLAG_4B_UID_IN_DATA) {      // get UID from datain
+               memcpy(rUIDBCC1, datain, 4);
+       } else if (flags & FLAG_7B_UID_IN_DATA) {
+               rUIDBCC1[0] = 0x88;
+               memcpy(rUIDBCC1+1, datain, 3);
+               memcpy(rUIDBCC2, datain+3, 4);
+               *uid_len = 7;
+       } else {
+               uint8_t probable_atqa;
+               emlGetMemBt(&probable_atqa, 7, 1);      // get UID from emul memory - weak guess at length
+               if (probable_atqa == 0x00) {            // ---------- 4BUID
+                       emlGetMemBt(rUIDBCC1, 0, 4);
+               } else {                                // ---------- 7BUID
+                       rUIDBCC1[0] = 0x88;
+                       emlGetMemBt(rUIDBCC1+1, 0, 3);
+                       emlGetMemBt(rUIDBCC2, 3, 4);
+                       *uid_len = 7;
+               }
+       }
+
+       switch (*uid_len) {
+               case 4:
+                       *cuid = bytes_to_num(rUIDBCC1, 4);
+                       rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
+                       if (MF_DBGLEVEL >= 2)   {
+                               Dbprintf("4B UID: %02x%02x%02x%02x", 
+                                       rUIDBCC1[0], rUIDBCC1[1], rUIDBCC1[2], rUIDBCC1[3]      );
+                       }
+                       break;
+               case 7:
+                       rATQA[0] |= 0x40;
+                       *cuid = bytes_to_num(rUIDBCC2, 4);
+                       rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3]; 
+                       rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3]; 
+                       if (MF_DBGLEVEL >= 2)   {
+                               Dbprintf("7B UID: %02x %02x %02x %02x %02x %02x %02x",
+                                       rUIDBCC1[1], rUIDBCC1[2], rUIDBCC1[3], rUIDBCC2[0], rUIDBCC2[1], rUIDBCC2[2], rUIDBCC2[3]  );
+                       }
+                       break;
+               default: 
+                       break;
+       }
+       
+       static tag_response_info_t responses_init[TAG_RESPONSE_COUNT] = {
+               { .response = rATQA,     .response_n = sizeof(rATQA)  },                // Answer to request - respond with card type
+               { .response = rUIDBCC1,  .response_n = sizeof(rUIDBCC1) },              // Anticollision cascade1 - respond with first part of uid
+               { .response = rUIDBCC2,  .response_n = sizeof(rUIDBCC2) },              // Anticollision cascade2 - respond with 2nd part of uid 
+               { .response = rSAKfinal, .response_n = sizeof(rSAKfinal)  },    // Acknowledge select - last cascade
+               { .response = rSAK1,     .response_n = sizeof(rSAK1) }                  // Acknowledge select - previous cascades
+       };
+
+       // Prepare ("precompile") the responses of the anticollision phase. There will be not enough time to do this at the moment the reader sends its REQA or SELECT
+       // There are 7 predefined responses with a total of 18 bytes data to transmit. Coded responses need one byte per bit to transfer (data, parity, start, stop, correction) 
+       // 18 * 8 data bits, 18 * 1 parity bits, 5 start bits, 5 stop bits, 5 correction bits  ->   need 177 bytes buffer
+       #define ALLOCATED_TAG_MODULATION_BUFFER_SIZE 177        // number of bytes required for precompiled responses
+
+       uint8_t *free_buffer_pointer = BigBuf_malloc(ALLOCATED_TAG_MODULATION_BUFFER_SIZE);
+       size_t free_buffer_size = ALLOCATED_TAG_MODULATION_BUFFER_SIZE;
+       for (size_t i = 0; i < TAG_RESPONSE_COUNT; i++) {
+               prepare_allocated_tag_modulation(&responses_init[i], &free_buffer_pointer, &free_buffer_size);
+       }
+
+       *responses = responses_init;
+
+       // indices into responses array:
+       #define ATQA     0
+       #define UIDBCC1  1
+       #define UIDBCC2  2
+       #define SAKfinal 3
+       #define SAK1     4
+
+}
+
+
+static bool HasValidCRC(uint8_t *receivedCmd, uint16_t receivedCmd_len) {
+       uint8_t CRC_byte_1, CRC_byte_2;
+       ComputeCrc14443(CRC_14443_A, receivedCmd, receivedCmd_len-2, &CRC_byte_1, &CRC_byte_2);
+       return (receivedCmd[receivedCmd_len-2] == CRC_byte_1 && receivedCmd[receivedCmd_len-1] == CRC_byte_2);
+}
+
+
+/**
+  *MIFARE 1K simulate.
+  *
+  *@param flags :
+  *    FLAG_INTERACTIVE - In interactive mode, we are expected to finish the operation with an ACK
+  * FLAG_4B_UID_IN_DATA - means that there is a 4-byte UID in the data-section, we're expected to use that
+  * FLAG_7B_UID_IN_DATA - means that there is a 7-byte UID in the data-section, we're expected to use that
+  * FLAG_10B_UID_IN_DATA       - use 10-byte UID in the data-section not finished
+  *    FLAG_NR_AR_ATTACK  - means we should collect NR_AR responses for bruteforcing later
+  * FLAG_RANDOM_NONCE - means we should generate some pseudo-random nonce data (only allows moebius attack)
+  *@param exitAfterNReads, exit simulation after n blocks have been read, 0 is infinite ...
+  * (unless reader attack mode enabled then it runs util it gets enough nonces to recover all keys attmpted)
+  */
+void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *datain)
+{
+       tag_response_info_t *responses;
+       uint8_t uid_len = 4; 
+       uint32_t cuid = 0;
+       uint8_t cardWRBL = 0;
+       uint8_t cardAUTHSC = 0;
+       uint8_t cardAUTHKEY = 0xff;  // no authentication
+       uint32_t cardRr = 0;
+       //uint32_t rn_enc = 0;
+       uint32_t ans = 0;
+       uint32_t cardINTREG = 0;
+       uint8_t cardINTBLOCK = 0;
+       struct Crypto1State mpcs = {0, 0};
+       struct Crypto1State *pcs;
+       pcs = &mpcs;
+       uint32_t numReads = 0;//Counts numer of times reader reads a block
+       uint8_t receivedCmd[MAX_MIFARE_FRAME_SIZE];
+       uint8_t receivedCmd_dec[MAX_MIFARE_FRAME_SIZE];
+       uint8_t receivedCmd_par[MAX_MIFARE_PARITY_SIZE];
+       uint16_t receivedCmd_len;
+       uint8_t response[MAX_MIFARE_FRAME_SIZE];
+       uint8_t response_par[MAX_MIFARE_PARITY_SIZE];
+       
+       uint8_t rAUTH_NT[] = {0x01, 0x02, 0x03, 0x04};
+       uint8_t rAUTH_AT[] = {0x00, 0x00, 0x00, 0x00};
+               
+       //Here, we collect UID,sector,keytype,NT,AR,NR,NT2,AR2,NR2
+       // This will be used in the reader-only attack.
+
+       //allow collecting up to 7 sets of nonces to allow recovery of up to 7 keys
+       #define ATTACK_KEY_COUNT 7 // keep same as define in cmdhfmf.c -> readerAttack() (Cannot be more than 7)
+       nonces_t ar_nr_resp[ATTACK_KEY_COUNT*2]; //*2 for 2 separate attack types (nml, moebius) 36 * 7 * 2 bytes = 504 bytes
+       memset(ar_nr_resp, 0x00, sizeof(ar_nr_resp));
+
+       uint8_t ar_nr_collected[ATTACK_KEY_COUNT*2]; //*2 for 2nd attack type (moebius)
+       memset(ar_nr_collected, 0x00, sizeof(ar_nr_collected));
+       uint8_t nonce1_count = 0;
+       uint8_t nonce2_count = 0;
+       uint8_t moebius_n_count = 0;
+       bool gettingMoebius = false;
+       uint8_t mM = 0; //moebius_modifier for collection storage
+
+       // Authenticate response - nonce
+       uint32_t nonce;
+       if (flags & FLAG_RANDOM_NONCE) {
+               nonce = prand();
+       } else {
+               nonce = bytes_to_num(rAUTH_NT, 4);
+       }
+
+       // free eventually allocated BigBuf memory but keep Emulator Memory
+       BigBuf_free_keep_EM();
+
+       MifareSimInit(flags, datain, &responses, &cuid, &uid_len);
+       
+       // We need to listen to the high-frequency, peak-detected path.
+       iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN);
+
+       // clear trace
+       clear_trace();
+       set_tracing(true);
+       ResetSspClk();
+       
+       bool finished = false;
+       bool button_pushed = BUTTON_PRESS();
+       int cardSTATE = MFEMUL_NOFIELD;
+
+       while (!button_pushed && !finished && !usb_poll_validate_length()) {
+               WDT_HIT();
+
+               // find reader field
+               if (cardSTATE == MFEMUL_NOFIELD) {
+                       int vHf = (MAX_ADC_HF_VOLTAGE * AvgAdc(ADC_CHAN_HF)) >> 10;
+                       if (vHf > MF_MINFIELDV) {
+                               LED_A_ON();
+                               cardSTATE_TO_IDLE();
+                       }
+                       button_pushed = BUTTON_PRESS();
+                       continue;
+               }
+
+               //Now, get data
+               int res = EmGetCmd(receivedCmd, &receivedCmd_len, receivedCmd_par);
+               
+               if (res == 2) { //Field is off!
+                       LEDsoff();
+                       cardSTATE = MFEMUL_NOFIELD;
+                       continue;
+               } else if (res == 1) { // button pressed
+                       button_pushed = true;
+                       break;
+               }
+
+               // WUPA in HALTED state or REQA or WUPA in any other state
+               if (receivedCmd_len == 1 && ((receivedCmd[0] == ISO14443A_CMD_REQA && cardSTATE != MFEMUL_HALTED) || receivedCmd[0] == ISO14443A_CMD_WUPA)) {
+                       EmSendPrecompiledCmd(&responses[ATQA], (receivedCmd[0] == ISO14443A_CMD_WUPA));
+
+                       // init crypto block
+                       crypto1_destroy(pcs);
+                       cardAUTHKEY = 0xff;
+                       if (flags & FLAG_RANDOM_NONCE) {
+                               nonce = prand();
+                       }
+                       LED_B_OFF();
+                       LED_C_OFF();
+                       cardSTATE = MFEMUL_SELECT1;
+                       continue;
+               }
+               
+               switch (cardSTATE) {
+                       case MFEMUL_NOFIELD:
+                       case MFEMUL_HALTED:
+                       case MFEMUL_IDLE:{
+                               break;
+                       }
+                       case MFEMUL_SELECT1:{
+                               // select all - 0x93 0x20
+                               if (receivedCmd_len == 2 && (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && receivedCmd[1] == 0x20)) {
+                                       if (MF_DBGLEVEL >= 4)   Dbprintf("SELECT ALL CL1 received");
+                                       EmSendPrecompiledCmd(&responses[UIDBCC1], false);
+                                       break;
+                               }
+                               // select card - 0x93 0x70 ...
+                               if (receivedCmd_len == 9 &&
+                                               (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], responses[UIDBCC1].response, 4) == 0)) {
+                                       if (MF_DBGLEVEL >= 4) Dbprintf("SELECT CL1 %02x%02x%02x%02x received",receivedCmd[2],receivedCmd[3],receivedCmd[4],receivedCmd[5]);
+                                       if (uid_len == 4) {
+                                               EmSendPrecompiledCmd(&responses[SAKfinal], false);
+                                               LED_B_ON();
+                                               cardSTATE = MFEMUL_WORK;
+                                               break;
+                                       } else if (uid_len == 7) {
+                                               EmSendPrecompiledCmd(&responses[SAK1], false);
+                                               cardSTATE       = MFEMUL_SELECT2;
+                                               break;
+                                       }
+                               }
+                               cardSTATE_TO_IDLE();
+                               break;
+                       }
+                       case MFEMUL_SELECT2:{
+                               // select all cl2 - 0x95 0x20
+                               if (receivedCmd_len == 2 && (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && receivedCmd[1] == 0x20)) {
+                                       if (MF_DBGLEVEL >= 4)   Dbprintf("SELECT ALL CL2 received");
+                                       EmSendPrecompiledCmd(&responses[UIDBCC2], false);
+                                       break;
+                               }
+                               // select cl2 card - 0x95 0x70 xxxxxxxxxxxx
+                               if (receivedCmd_len == 9 && 
+                                               (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], responses[UIDBCC2].response, 4) == 0)) {
+                                       if (uid_len == 7) {
+                                               if (MF_DBGLEVEL >= 4) Dbprintf("SELECT CL2 %02x%02x%02x%02x received",receivedCmd[2],receivedCmd[3],receivedCmd[4],receivedCmd[5]);
+                                               EmSendPrecompiledCmd(&responses[SAKfinal], false);
+                                               LED_B_ON();
+                                               cardSTATE = MFEMUL_WORK;
+                                               break;
+                                       }
+                               }
+                               cardSTATE_TO_IDLE();
+                               break;
+                       }
+                       case MFEMUL_WORK:{
+                               if (receivedCmd_len != 4) {     // all commands must have exactly 4 bytes
+                                       break;
+                               }
+                               bool encrypted_data = (cardAUTHKEY != 0xFF) ;
+                               if (encrypted_data) {
+                                       // decrypt seqence
+                                       mf_crypto1_decryptEx(pcs, receivedCmd, receivedCmd_len, receivedCmd_dec);
+                               } else {
+                                       memcpy(receivedCmd_dec, receivedCmd, receivedCmd_len);
+                               }
+                               if (!HasValidCRC(receivedCmd_dec, receivedCmd_len)) { // all commands must have a valid CRC
+                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+                                       break;
+                               }
+                               if (receivedCmd_dec[0] == MIFARE_AUTH_KEYA || receivedCmd_dec[0] == MIFARE_AUTH_KEYB) {
+                                       // if authenticating to a block that shouldn't exist - as long as we are not doing the reader attack
+                                       if (receivedCmd_dec[1] >= 16 * 4 && !(flags & FLAG_NR_AR_ATTACK)) {
+                                               //is this the correct response to an auth on a out of range block? marshmellow
+                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+                                               if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate (0x%02x) on out of range block: %d (0x%02x), nacking",receivedCmd_dec[0],receivedCmd_dec[1],receivedCmd_dec[1]);
+                                               break;
+                                       }
+                                       cardAUTHSC = receivedCmd_dec[1] / 4;  // received block num
+                                       cardAUTHKEY = receivedCmd_dec[0] & 0x01;
+                                       crypto1_destroy(pcs);//Added by martin
+                                       crypto1_create(pcs, emlGetKey(cardAUTHSC, cardAUTHKEY));
+                                       if (!encrypted_data) { // first authentication
+                                               if (MF_DBGLEVEL >= 4) Dbprintf("Reader authenticating for block %d (0x%02x) with key %d",receivedCmd_dec[1], receivedCmd_dec[1], cardAUTHKEY);
+                                               crypto1_word(pcs, cuid ^ nonce, 0);//Update crypto state
+                                               num_to_bytes(nonce, 4, rAUTH_AT); // Send nonce
+                                       } else { // nested authentication
+                                               if (MF_DBGLEVEL >= 4) Dbprintf("Reader doing nested authentication for block %d (0x%02x) with key %d", receivedCmd_dec[1], receivedCmd_dec[1], cardAUTHKEY);
+                                               ans = nonce ^ crypto1_word(pcs, cuid ^ nonce, 0); 
+                                               num_to_bytes(ans, 4, rAUTH_AT);
+                                       }
+                                       EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
+                                       cardSTATE = MFEMUL_AUTH1;
+                                       break;
+                               }
+                               if (!encrypted_data) { // all other commands must be encrypted (authenticated)
+                                       break;
+                               }
+                               if(receivedCmd_dec[0] == ISO14443A_CMD_READBLOCK
+                                       || receivedCmd_dec[0] == ISO14443A_CMD_WRITEBLOCK
+                                       || receivedCmd_dec[0] == MIFARE_CMD_INC
+                                       || receivedCmd_dec[0] == MIFARE_CMD_DEC
+                                       || receivedCmd_dec[0] == MIFARE_CMD_RESTORE
+                                       || receivedCmd_dec[0] == MIFARE_CMD_TRANSFER) {
+                                       if (receivedCmd_dec[1] >= 16 * 4) {
+                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+                                               if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate (0x%02x) on out of range block: %d (0x%02x), nacking",receivedCmd_dec[0],receivedCmd_dec[1],receivedCmd_dec[1]);
+                                               break;
+                                       }
+                                       if (receivedCmd_dec[1] / 4 != cardAUTHSC) {
+                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+                                               if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate (0x%02x) on block (0x%02x) not authenticated for (0x%02x), nacking",receivedCmd_dec[0],receivedCmd_dec[1],cardAUTHSC);
+                                               break;
+                                       }
+                               }
+                               if (receivedCmd_dec[0] == ISO14443A_CMD_READBLOCK) {
+                                       if (MF_DBGLEVEL >= 4) {
+                                               Dbprintf("Reader reading block %d (0x%02x)",receivedCmd_dec[1],receivedCmd_dec[1]);
+                                       }
+                                       emlGetMem(response, receivedCmd_dec[1], 1);
+                                       AppendCrc14443a(response, 16);
+                                       mf_crypto1_encrypt(pcs, response, 18, response_par);
+                                       EmSendCmdPar(response, 18, response_par);
+                                       numReads++;
+                                       if(exitAfterNReads > 0 && numReads == exitAfterNReads) {
+                                               Dbprintf("%d reads done, exiting", numReads);
+                                               finished = true;
+                                       }
+                                       break;
+                               }
+                               if (receivedCmd_dec[0] == ISO14443A_CMD_WRITEBLOCK) {
+                                       if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0xA0 write block %d (%02x)",receivedCmd_dec[1],receivedCmd_dec[1]);
+                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
+                                       cardWRBL = receivedCmd_dec[1];
+                                       cardSTATE = MFEMUL_WRITEBL2;
+                                       break;
+                               }
+                               if (receivedCmd_dec[0] == MIFARE_CMD_INC || receivedCmd_dec[0] == MIFARE_CMD_DEC || receivedCmd_dec[0] == MIFARE_CMD_RESTORE) {
+                                       if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0x%02x inc(0xC1)/dec(0xC0)/restore(0xC2) block %d (%02x)",receivedCmd_dec[0],receivedCmd_dec[1],receivedCmd_dec[1]);
+                                       if (emlCheckValBl(receivedCmd_dec[1])) {
+                                               if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate on block, but emlCheckValBl failed, nacking");
+                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+                                               break;
+                                       }
+                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
+                                       cardWRBL = receivedCmd_dec[1];
+                                       if (receivedCmd_dec[0] == MIFARE_CMD_INC)
+                                               cardSTATE = MFEMUL_INTREG_INC;
+                                       if (receivedCmd_dec[0] == MIFARE_CMD_DEC)
+                                               cardSTATE = MFEMUL_INTREG_DEC;
+                                       if (receivedCmd_dec[0] == MIFARE_CMD_RESTORE)
+                                               cardSTATE = MFEMUL_INTREG_REST;
+                                       break;
+                               }
+                               if (receivedCmd_dec[0] == MIFARE_CMD_TRANSFER) {
+                                       if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0x%02x transfer block %d (%02x)",receivedCmd_dec[0],receivedCmd_dec[1],receivedCmd_dec[1]);
+                                       if (emlSetValBl(cardINTREG, cardINTBLOCK, receivedCmd_dec[1]))
+                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+                                       else
+                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
+                                       break;
+                               }
+                               // halt
+                               if (receivedCmd_dec[0] == ISO14443A_CMD_HALT && receivedCmd_dec[1] == 0x00) {
+                                       if (MF_DBGLEVEL >= 4)   Dbprintf("--> HALTED.");
+                                       LED_B_OFF();
+                                       LED_C_OFF();
+                                       cardSTATE = MFEMUL_HALTED;
+                                       break;
+                               }
+                               // command not allowed
+                               if (MF_DBGLEVEL >= 4)   Dbprintf("Received command not allowed, nacking");
+                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+                               break;
+                       }
+                       case MFEMUL_AUTH1:{
+                               if (receivedCmd_len != 8) {
+                                       cardSTATE_TO_IDLE();
+                                       break;
+                               }
+
+                               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) {
+                                       for (uint8_t i = 0; i < ATTACK_KEY_COUNT; i++) {
+                                               if ( ar_nr_collected[i+mM]==0 || ((cardAUTHSC == ar_nr_resp[i+mM].sector) && (cardAUTHKEY == ar_nr_resp[i+mM].keytype) && (ar_nr_collected[i+mM] > 0)) ) {
+                                                       // if first auth for sector, or matches sector and keytype of previous auth
+                                                       if (ar_nr_collected[i+mM] < 2) {
+                                                               // if we haven't already collected 2 nonces for this sector
+                                                               if (ar_nr_resp[ar_nr_collected[i+mM]].ar != ar) {
+                                                                       // Avoid duplicates... probably not necessary, ar should vary. 
+                                                                       if (ar_nr_collected[i+mM]==0) {
+                                                                               // first nonce collect
+                                                                               ar_nr_resp[i+mM].cuid = cuid;
+                                                                               ar_nr_resp[i+mM].sector = cardAUTHSC;
+                                                                               ar_nr_resp[i+mM].keytype = cardAUTHKEY;
+                                                                               ar_nr_resp[i+mM].nonce = nonce;
+                                                                               ar_nr_resp[i+mM].nr = nr;
+                                                                               ar_nr_resp[i+mM].ar = ar;
+                                                                               nonce1_count++;
+                                                                               // add this nonce to first moebius nonce
+                                                                               ar_nr_resp[i+ATTACK_KEY_COUNT].cuid = cuid;
+                                                                               ar_nr_resp[i+ATTACK_KEY_COUNT].sector = cardAUTHSC;
+                                                                               ar_nr_resp[i+ATTACK_KEY_COUNT].keytype = cardAUTHKEY;
+                                                                               ar_nr_resp[i+ATTACK_KEY_COUNT].nonce = nonce;
+                                                                               ar_nr_resp[i+ATTACK_KEY_COUNT].nr = nr;
+                                                                               ar_nr_resp[i+ATTACK_KEY_COUNT].ar = ar;
+                                                                               ar_nr_collected[i+ATTACK_KEY_COUNT]++;
+                                                                       } else { // second nonce collect (std and moebius)
+                                                                               ar_nr_resp[i+mM].nonce2 = nonce;
+                                                                               ar_nr_resp[i+mM].nr2 = nr;
+                                                                               ar_nr_resp[i+mM].ar2 = ar;
+                                                                               if (!gettingMoebius) {
+                                                                                       nonce2_count++;
+                                                                                       // check if this was the last second nonce we need for std attack
+                                                                                       if ( nonce2_count == nonce1_count ) {
+                                                                                               // done collecting std test switch to moebius
+                                                                                               // first finish incrementing last sample
+                                                                                               ar_nr_collected[i+mM]++; 
+                                                                                               // switch to moebius collection
+                                                                                               gettingMoebius = true;
+                                                                                               mM = ATTACK_KEY_COUNT;
+                                                                                               if (flags & FLAG_RANDOM_NONCE) {
+                                                                                                       nonce = prand();
+                                                                                               } else {
+                                                                                                       nonce = nonce*7;
+                                                                                               }
+                                                                                               break;
+                                                                                       }
+                                                                               } else {
+                                                                                       moebius_n_count++;
+                                                                                       // if we've collected all the nonces we need - finish.
+                                                                                       if (nonce1_count == moebius_n_count) finished = true;
+                                                                               }
+                                                                       }
+                                                                       ar_nr_collected[i+mM]++;
+                                                               }
+                                                       }
+                                                       // we found right spot for this nonce stop looking
+                                                       break;
+                                               }
+                                       }
+                               }
+
+                               // --- crypto
+                               crypto1_word(pcs, nr , 1);
+                               cardRr = ar ^ crypto1_word(pcs, 0, 0);
+
+                               // test if auth OK
+                               if (cardRr != prng_successor(nonce, 64)){
+                                       if (MF_DBGLEVEL >= 2) Dbprintf("AUTH FAILED for sector %d with key %c. cardRr=%08x, succ=%08x",
+                                                       cardAUTHSC, cardAUTHKEY == 0 ? 'A' : 'B',
+                                                       cardRr, prng_successor(nonce, 64));
+                                       // 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
+                                       cardAUTHKEY = 0xff;     // not authenticated
+                                       cardSTATE_TO_IDLE();
+                                       break;
+                               }
+                               ans = prng_successor(nonce, 96) ^ crypto1_word(pcs, 0, 0);
+                               num_to_bytes(ans, 4, rAUTH_AT);
+                               EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
+                               if (MF_DBGLEVEL >= 4)   Dbprintf("AUTH COMPLETED for sector %d with key %c.", cardAUTHSC, cardAUTHKEY == 0 ? 'A' : 'B');
+                               LED_C_ON();
+                               cardSTATE = MFEMUL_WORK;
+                               break;
+                       }
+                       case MFEMUL_WRITEBL2:{
+                               if (receivedCmd_len == 18) {
+                                       mf_crypto1_decryptEx(pcs, receivedCmd, receivedCmd_len, receivedCmd_dec);
+                                       if (HasValidCRC(receivedCmd_dec, receivedCmd_len)) {
+                                               emlSetMem(receivedCmd_dec, cardWRBL, 1);
+                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
+                                               cardSTATE = MFEMUL_WORK;
+                                               break;
+                                       }
+                               }
+                               cardSTATE_TO_IDLE();
+                               break;
+                       }
+                       case MFEMUL_INTREG_INC:{
+                               if (receivedCmd_len == 6) {
+                                       mf_crypto1_decryptEx(pcs, receivedCmd, receivedCmd_len, (uint8_t*)&ans);
+                                       if (emlGetValBl(&cardINTREG, &cardINTBLOCK, cardWRBL)) {
+                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+                                               cardSTATE_TO_IDLE();
+                                               break;
+                                       }
+                                       cardINTREG = cardINTREG + ans;
+                               }
+                               cardSTATE = MFEMUL_WORK;
+                               break;
+                       }
+                       case MFEMUL_INTREG_DEC:{
+                               if (receivedCmd_len == 6) {
+                                       mf_crypto1_decryptEx(pcs, receivedCmd, receivedCmd_len, (uint8_t*)&ans);
+                                       if (emlGetValBl(&cardINTREG, &cardINTBLOCK, cardWRBL)) {
+                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+                                               cardSTATE_TO_IDLE();
+                                               break;
+                                       }
+                               }
+                               cardINTREG = cardINTREG - ans;
+                               cardSTATE = MFEMUL_WORK;
+                               break;
+                       }
+                       case MFEMUL_INTREG_REST:{
+                               mf_crypto1_decryptEx(pcs, receivedCmd, receivedCmd_len, (uint8_t*)&ans);
+                               if (emlGetValBl(&cardINTREG, &cardINTBLOCK, cardWRBL)) {
+                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+                                       cardSTATE_TO_IDLE();
+                                       break;
+                               }
+                               cardSTATE = MFEMUL_WORK;
+                               break;
+                       }
+               }
+               button_pushed = BUTTON_PRESS();
+       }
+
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       LEDsoff();
+
+       if(flags & FLAG_NR_AR_ATTACK && MF_DBGLEVEL >= 1) {
+               for ( uint8_t   i = 0; i < ATTACK_KEY_COUNT; i++) {
+                       if (ar_nr_collected[i] == 2) {
+                               Dbprintf("Collected two pairs of AR/NR which can be used to extract %s from reader for sector %d:", (i<ATTACK_KEY_COUNT/2) ? "keyA" : "keyB", ar_nr_resp[i].sector);
+                               Dbprintf("../tools/mfkey/mfkey32 %08x %08x %08x %08x %08x %08x",
+                                               ar_nr_resp[i].cuid,  //UID
+                                               ar_nr_resp[i].nonce, //NT
+                                               ar_nr_resp[i].nr,    //NR1
+                                               ar_nr_resp[i].ar,    //AR1
+                                               ar_nr_resp[i].nr2,   //NR2
+                                               ar_nr_resp[i].ar2    //AR2
+                                               );
+                       }
+               }       
+               for ( uint8_t   i = ATTACK_KEY_COUNT; i < ATTACK_KEY_COUNT*2; i++) {
+                       if (ar_nr_collected[i] == 2) {
+                               Dbprintf("Collected two pairs of AR/NR which can be used to extract %s from reader for sector %d:", (i<ATTACK_KEY_COUNT/2) ? "keyA" : "keyB", ar_nr_resp[i].sector);
+                               Dbprintf("../tools/mfkey/mfkey32v2 %08x %08x %08x %08x %08x %08x %08x",
+                                               ar_nr_resp[i].cuid,  //UID
+                                               ar_nr_resp[i].nonce, //NT
+                                               ar_nr_resp[i].nr,    //NR1
+                                               ar_nr_resp[i].ar,    //AR1
+                                               ar_nr_resp[i].nonce2,//NT2
+                                               ar_nr_resp[i].nr2,   //NR2
+                                               ar_nr_resp[i].ar2    //AR2
+                                               );
+                       }
+               }
+       }
+       if (MF_DBGLEVEL >= 1)   Dbprintf("Emulator stopped. Tracing: %d  trace length: %d ", get_tracing(), BigBuf_get_traceLen());
+
+       if(flags & FLAG_INTERACTIVE) { // Interactive mode flag, means we need to send ACK
+               //Send the collected ar_nr in the response
+               cmd_send(CMD_ACK,CMD_SIMULATE_MIFARE_CARD,button_pushed,0,&ar_nr_resp,sizeof(ar_nr_resp));
+       }
+}
diff --git a/armsrc/mifaresim.h b/armsrc/mifaresim.h
new file mode 100644 (file)
index 0000000..1e17a88
--- /dev/null
@@ -0,0 +1,20 @@
+//-----------------------------------------------------------------------------
+// Merlok - June 2011, 2012
+// Gerhard de Koning Gans - May 2008
+// Hagen Fritsch - June 2010
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// Mifare Classic Card Simulation
+//-----------------------------------------------------------------------------
+
+#ifndef __MIFARESIM_H
+#define __MIFARESIM_H
+
+#include <stdint.h>
+
+extern void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *datain);
+
+#endif
index 97f7b3d1afe0acd7c72e13d03b9f66ba34f97415..e5ef6c19b112d7082fb1e333d39b3881d2fe5699 100644 (file)
 int MF_DBGLEVEL = MF_DBG_ALL;\r
 \r
 // crypto1 helpers\r
-void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len){\r
+void mf_crypto1_decryptEx(struct Crypto1State *pcs, uint8_t *data_in, int len, uint8_t *data_out){\r
        uint8_t bt = 0;\r
        int i;\r
        \r
        if (len != 1) {\r
                for (i = 0; i < len; i++)\r
-                       data[i] = crypto1_byte(pcs, 0x00, 0) ^ data[i];\r
+                       data_out[i] = crypto1_byte(pcs, 0x00, 0) ^ data_in[i];\r
        } else {\r
                bt = 0;\r
                for (i = 0; i < 4; i++)\r
-                       bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data[0], i)) << i;\r
+                       bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data_in[0], i)) << i;\r
                                \r
-               data[0] = bt;\r
+               data_out[0] = bt;\r
        }\r
        return;\r
 }\r
 \r
+void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len){\r
+       mf_crypto1_decryptEx(pcs, data, len, data);\r
+}\r
+\r
 void mf_crypto1_encrypt(struct Crypto1State *pcs, uint8_t *data, uint16_t len, uint8_t *par) {\r
        uint8_t bt = 0;\r
        int i;\r
index 8ffd5e897d9121ac808ce66346818dec480dfbb6..645d0e7dff08d1cecb8cc06fd4cdfd152cc079de 100644 (file)
 \r
 extern int MF_DBGLEVEL;\r
 \r
-//mifare emulator states\r
-#define MFEMUL_NOFIELD      0\r
-#define MFEMUL_IDLE         1\r
-#define MFEMUL_SELECT1      2\r
-#define MFEMUL_SELECT2      3\r
-#define MFEMUL_SELECT3      4\r
-#define MFEMUL_AUTH1        5\r
-#define MFEMUL_AUTH2        6\r
-#define MFEMUL_WORK            7\r
-#define MFEMUL_WRITEBL2     8\r
-#define MFEMUL_INTREG_INC   9\r
-#define MFEMUL_INTREG_DEC  10\r
-#define MFEMUL_INTREG_REST 11\r
-#define MFEMUL_HALTED      12\r
-\r
-#define cardSTATE_TO_IDLE() cardSTATE = MFEMUL_IDLE; LED_B_OFF(); LED_C_OFF();\r
-\r
 //functions\r
 int mifare_sendcmd(uint8_t cmd, uint8_t *data, uint8_t data_size, uint8_t* answer, uint8_t *answer_parity, uint32_t *timing);\r
 int mifare_sendcmd_short(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t data, uint8_t* answer, uint8_t *answer_parity, uint32_t *timing);\r
@@ -85,6 +68,7 @@ int mifare_desfire_des_auth2(uint32_t uid, uint8_t *key, uint8_t *blockData);
 \r
 // crypto functions\r
 void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *receivedCmd, int len);\r
+void mf_crypto1_decryptEx(struct Crypto1State *pcs, uint8_t *data_in, int len, uint8_t *data_out);\r
 void mf_crypto1_encrypt(struct Crypto1State *pcs, uint8_t *data, uint16_t len, uint8_t *par);\r
 uint8_t mf_crypto1_encrypt4bit(struct Crypto1State *pcs, uint8_t data);\r
 \r
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