Merge branch 'master' into fix_iclass_sim
authorpwpiwi <pwpiwi@users.noreply.github.com>
Tue, 24 Sep 2019 17:34:05 +0000 (19:34 +0200)
committerpwpiwi <pwpiwi@users.noreply.github.com>
Tue, 24 Sep 2019 17:34:05 +0000 (19:34 +0200)
armsrc/iclass.c
armsrc/iso15693.c
armsrc/iso15693.h
client/cmdhficlass.c
client/cmdhflist.c
client/loclass/cipher.c
client/loclass/elite_crack.c
common/iso15693tools.h
fpga/fpga_hf.bit
fpga/hi_simulate.v
include/usb_cmd.h

index 5d7375a7bd8ad982778ad41046925570e9fa33e0..23701540f1c50f0f29a1b16a010640ab96203524 100644 (file)
 #include "apps.h"
 #include "util.h"
 #include "string.h"
+#include "printf.h"
 #include "common.h"
 #include "cmd.h"
 #include "iso14443a.h"
+#include "iso15693.h"
 // Needed for CRC in emulation mode;
 // same construction as in ISO 14443;
 // different initial value (CRC_ICLASS)
@@ -391,8 +393,7 @@ static RAMFUNC int ManchesterDecoding(int v) {
                        Demod.shiftReg = 0;
                        Demod.samples = 0;
                        if (Demod.posCount) {
-                               //if (trigger) LED_A_OFF();  // Not useful in this case...
-                               switch(Demod.syncBit) {
+                               switch (Demod.syncBit) {
                                        case 0x08: Demod.samples = 3; break;
                                        case 0x04: Demod.samples = 2; break;
                                        case 0x02: Demod.samples = 1; break;
@@ -414,12 +415,13 @@ static RAMFUNC int ManchesterDecoding(int v) {
 
                }
        } else {
+               // state is DEMOD is in SYNC from here on.
                modulation = bit & Demod.syncBit;
                modulation |= ((bit << 1) ^ ((Demod.buffer & 0x08) >> 3)) & Demod.syncBit;
 
                Demod.samples += 4;
 
-               if (Demod.posCount==0) {
+               if (Demod.posCount == 0) {
                        Demod.posCount = 1;
                        if (modulation) {
                                Demod.sub = SUB_FIRST_HALF;
@@ -428,14 +430,6 @@ static RAMFUNC int ManchesterDecoding(int v) {
                        }
                } else {
                        Demod.posCount = 0;
-                       /*(modulation && (Demod.sub == SUB_FIRST_HALF)) {
-                               if (Demod.state!=DEMOD_ERROR_WAIT) {
-                                       Demod.state = DEMOD_ERROR_WAIT;
-                                       Demod.output[Demod.len] = 0xaa;
-                                       error = 0x01;
-                               }
-                       }*/
-                       //else if (modulation) {
                        if (modulation) {
                                if (Demod.sub == SUB_FIRST_HALF) {
                                        Demod.sub = SUB_BOTH;
@@ -447,23 +441,16 @@ static RAMFUNC int ManchesterDecoding(int v) {
                                        Demod.output[Demod.len] = 0x0f;
                                        Demod.len++;
                                        Demod.state = DEMOD_UNSYNCD;
-//                  error = 0x0f;
                                        return true;
                                } else {
                                        Demod.state = DEMOD_ERROR_WAIT;
                                        error = 0x33;
                                }
-                               /*if (Demod.state!=DEMOD_ERROR_WAIT) {
-                                       Demod.state = DEMOD_ERROR_WAIT;
-                                       Demod.output[Demod.len] = 0xaa;
-                                       error = 0x01;
-                               }*/
                        }
 
                        switch(Demod.state) {
                                case DEMOD_START_OF_COMMUNICATION:
                                        if (Demod.sub == SUB_BOTH) {
-                                               //Demod.state = DEMOD_MANCHESTER_D;
                                                Demod.state = DEMOD_START_OF_COMMUNICATION2;
                                                Demod.posCount = 1;
                                                Demod.sub = SUB_NONE;
@@ -484,10 +471,7 @@ static RAMFUNC int ManchesterDecoding(int v) {
                                        break;
                                case DEMOD_START_OF_COMMUNICATION3:
                                        if (Demod.sub == SUB_SECOND_HALF) {
-//                      Demod.state = DEMOD_MANCHESTER_D;
                                                Demod.state = DEMOD_SOF_COMPLETE;
-                                               //Demod.output[Demod.len] = Demod.syncBit & 0xFF;
-                                               //Demod.len++;
                                        } else {
                                                Demod.output[Demod.len] = 0xab;
                                                Demod.state = DEMOD_ERROR_WAIT;
@@ -543,16 +527,6 @@ static RAMFUNC int ManchesterDecoding(int v) {
                                        break;
                        }
 
-                       /*if (Demod.bitCount>=9) {
-                               Demod.output[Demod.len] = Demod.shiftReg & 0xff;
-                               Demod.len++;
-
-                               Demod.parityBits <<= 1;
-                               Demod.parityBits ^= ((Demod.shiftReg >> 8) & 0x01);
-
-                               Demod.bitCount = 0;
-                               Demod.shiftReg = 0;
-                       }*/
                        if (Demod.bitCount >= 8) {
                                Demod.shiftReg >>= 1;
                                Demod.output[Demod.len] = (Demod.shiftReg & 0xff);
@@ -782,133 +756,7 @@ void rotateCSN(uint8_t* originalCSN, uint8_t* rotatedCSN) {
        }
 }
 
-//-----------------------------------------------------------------------------
-// Wait for commands from reader
-// Stop when button is pressed
-// Or return true when command is captured
-//-----------------------------------------------------------------------------
-static int GetIClassCommandFromReader(uint8_t *received, int *len, int maxLen)
-{
-       // Set FPGA mode to "simulated ISO 14443 tag", no modulation (listen
-       // only, since we are receiving, not transmitting).
-       // Signal field is off with the appropriate LED
-       LED_D_OFF();
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN);
-
-       // Now run a `software UART' on the stream of incoming samples.
-       Uart.output = received;
-       Uart.byteCntMax = maxLen;
-       Uart.state = STATE_UNSYNCD;
-
-       for (;;) {
-               WDT_HIT();
-
-               if (BUTTON_PRESS()) return false;
-
-               if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
-                       AT91C_BASE_SSC->SSC_THR = 0x00;
-               }
-               if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
-                       uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
-
-                       if (OutOfNDecoding(b & 0x0f)) {
-                               *len = Uart.byteCnt;
-                               return true;
-                       }
-               }
-       }
-}
-
-static uint8_t encode4Bits(const uint8_t b) {
-       uint8_t c = b & 0xF;
-       // OTA, the least significant bits first
-       //         The columns are
-       //               1 - Bit value to send
-       //               2 - Reversed (big-endian)
-       //               3 - Encoded
-       //               4 - Hex values
-
-       switch(c){
-       //                          1       2         3         4
-         case 15: return 0x55; // 1111 -> 1111 -> 01010101 -> 0x55
-         case 14: return 0x95; // 1110 -> 0111 -> 10010101 -> 0x95
-         case 13: return 0x65; // 1101 -> 1011 -> 01100101 -> 0x65
-         case 12: return 0xa5; // 1100 -> 0011 -> 10100101 -> 0xa5
-         case 11: return 0x59; // 1011 -> 1101 -> 01011001 -> 0x59
-         case 10: return 0x99; // 1010 -> 0101 -> 10011001 -> 0x99
-         case 9:  return 0x69; // 1001 -> 1001 -> 01101001 -> 0x69
-         case 8:  return 0xa9; // 1000 -> 0001 -> 10101001 -> 0xa9
-         case 7:  return 0x56; // 0111 -> 1110 -> 01010110 -> 0x56
-         case 6:  return 0x96; // 0110 -> 0110 -> 10010110 -> 0x96
-         case 5:  return 0x66; // 0101 -> 1010 -> 01100110 -> 0x66
-         case 4:  return 0xa6; // 0100 -> 0010 -> 10100110 -> 0xa6
-         case 3:  return 0x5a; // 0011 -> 1100 -> 01011010 -> 0x5a
-         case 2:  return 0x9a; // 0010 -> 0100 -> 10011010 -> 0x9a
-         case 1:  return 0x6a; // 0001 -> 1000 -> 01101010 -> 0x6a
-         default: return 0xaa; // 0000 -> 0000 -> 10101010 -> 0xaa
-
-       }
-}
-
-//-----------------------------------------------------------------------------
-// Prepare tag messages
-//-----------------------------------------------------------------------------
-static void CodeIClassTagAnswer(const uint8_t *cmd, int len) {
-
-       /*
-        * SOF comprises 3 parts;
-        * * An unmodulated time of 56.64 us
-        * * 24 pulses of 423.75 kHz (fc/32)
-        * * A logic 1, which starts with an unmodulated time of 18.88us
-        *   followed by 8 pulses of 423.75kHz (fc/32)
-        *
-        *
-        * EOF comprises 3 parts:
-        * - A logic 0 (which starts with 8 pulses of fc/32 followed by an unmodulated
-        *   time of 18.88us.
-        * - 24 pulses of fc/32
-        * - An unmodulated time of 56.64 us
-        *
-        *
-        * A logic 0 starts with 8 pulses of fc/32
-        * followed by an unmodulated time of 256/fc (~18,88us).
-        *
-        * A logic 0 starts with unmodulated time of 256/fc (~18,88us) followed by
-        * 8 pulses of fc/32 (also 18.88us)
-        *
-        * The mode FPGA_HF_SIMULATOR_MODULATE_424K_8BIT which we use to simulate tag,
-        * works like this.
-        * - A 1-bit input to the FPGA becomes 8 pulses on 423.5kHz (fc/32) (18.88us).
-        * - A 0-bit input to the FPGA becomes an unmodulated time of 18.88us
-        *
-        * In this mode the SOF can be written as 00011101 = 0x1D
-        * The EOF can be written as 10111000 = 0xb8
-        * A logic 1 is 01
-        * A logic 0 is 10
-        *
-        * */
-
-       int i;
-
-       ToSendReset();
-
-       // Send SOF
-       ToSend[++ToSendMax] = 0x1D;
-
-       for (i = 0; i < len; i++) {
-               uint8_t b = cmd[i];
-               ToSend[++ToSendMax] = encode4Bits(b & 0xF);       // Least significant half
-               ToSend[++ToSendMax] = encode4Bits((b >>4) & 0xF); // Most significant half
-       }
-
-       // Send EOF
-       ToSend[++ToSendMax] = 0xB8;
-       //lastProxToAirDuration  = 8*ToSendMax - 3*8 - 3*8;//Not counting zeroes in the beginning or end
-       // Convert from last byte pos to length
-       ToSendMax++;
-}
-
-// Only SOF
+// Encode SOF only
 static void CodeIClassTagSOF() {
        //So far a dummy implementation, not used
        //int lastProxToAirDuration =0;
@@ -926,61 +774,21 @@ static void AppendCrc(uint8_t *data, int len) {
        ComputeCrc14443(CRC_ICLASS, data, len, data+len, data+len+1);
 }
 
-static int SendIClassAnswer(uint8_t *resp, int respLen, int delay) {
-       int i = 0, d = 0;//, u = 0, d = 0;
-       uint8_t b = 0;
-
-       //FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR|FPGA_HF_SIMULATOR_MODULATE_424K);
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_MODULATE_424K_8BIT);
-
-       AT91C_BASE_SSC->SSC_THR = 0x00;
-       FpgaSetupSsc(FPGA_MAJOR_MODE_HF_SIMULATOR);
-       while (!BUTTON_PRESS()) {
-               if ((AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)){
-                       b = AT91C_BASE_SSC->SSC_RHR; (void) b;
-               }
-               if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)){
-                       b = 0x00;
-                       if (d < delay) {
-                               d++;
-                       }
-                       else {
-                               if (i < respLen) {
-                                       b = resp[i];
-                                       //Hack
-                                       //b = 0xAC;
-                               }
-                               i++;
-                       }
-                       AT91C_BASE_SSC->SSC_THR = b;
-               }
-
-//      if (i > respLen +4) break;
-               if (i > respLen + 1) break;
-       }
-
-       return 0;
-}
-
-
-#define MODE_SIM_CSN        0
-#define MODE_EXIT_AFTER_MAC 1
-#define MODE_FULLSIM        2
 
 /**
  * @brief Does the actual simulation
- * @param csn - csn to use
- * @param breakAfterMacReceived if true, returns after reader MAC has been received.
  */
 int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) {
+
        // free eventually allocated BigBuf memory
        BigBuf_free_keep_EM();
 
        State cipher_state;
-//  State cipher_state_reserve;
-       uint8_t *csn = BigBuf_get_EM_addr();
-       uint8_t *emulator = csn;
-       uint8_t sof_data[] = { 0x0F} ;
+
+       uint8_t *emulator = BigBuf_get_EM_addr();
+       uint8_t *csn = emulator;
+       uint8_t sof_data[] = { 0x0F } ;
+
        // CSN followed by two CRC bytes
        uint8_t anticoll_data[10] = { 0 };
        uint8_t csn_data[10] = { 0 };
@@ -991,21 +799,26 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) {
        rotateCSN(csn_data, anticoll_data);
 
        // Compute CRC on both CSNs
-       ComputeCrc14443(CRC_ICLASS, anticoll_data, 8, &anticoll_data[8], &anticoll_data[9]);
-       ComputeCrc14443(CRC_ICLASS, csn_data, 8, &csn_data[8], &csn_data[9]);
+       AppendCrc(anticoll_data, 8);
+       AppendCrc(csn_data, 8);
 
        uint8_t diversified_key[8] = { 0 };
        // e-Purse
-       uint8_t card_challenge_data[8] = { 0x00 };
-       if (simulationMode == MODE_FULLSIM) {
-               //The diversified key should be stored on block 3
-               //Get the diversified key from emulator memory
-               memcpy(diversified_key, emulator + (8*3), 8);
-               //Card challenge, a.k.a e-purse is on block 2
+       uint8_t card_challenge_data[8] = { 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+       //uint8_t card_challenge_data[8] = { 0 };
+       if (simulationMode == ICLASS_SIM_MODE_FULL) {
+               // The diversified key should be stored on block 3
+               // Get the diversified key from emulator memory
+               memcpy(diversified_key, emulator + (8 * 3), 8);
+               // Card challenge, a.k.a e-purse is on block 2
                memcpy(card_challenge_data, emulator + (8 * 2), 8);
-               //Precalculate the cipher state, feeding it the CC
+               // Precalculate the cipher state, feeding it the CC
                cipher_state = opt_doTagMAC_1(card_challenge_data, diversified_key);
        }
+       // save card challenge for sim2,4 attack
+       if (reader_mac_buf != NULL) {
+               memcpy(reader_mac_buf, card_challenge_data, 8);
+       }
 
        int exitLoop = 0;
        // Reader 0a
@@ -1026,234 +839,317 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) {
 
        // Anticollision CSN (rotated CSN)
        // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
-       uint8_t *resp_anticoll = BigBuf_malloc(28);
+       uint8_t *resp_anticoll = BigBuf_malloc(22);
        int resp_anticoll_len;
 
-       // CSN
+       // CSN (block 0)
        // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
-       uint8_t *resp_csn = BigBuf_malloc(30);
+       uint8_t *resp_csn = BigBuf_malloc(22);
        int resp_csn_len;
 
-       // e-Purse
+       // configuration (block 1) picopass 2ks
+       uint8_t *resp_conf = BigBuf_malloc(22);
+       int resp_conf_len;
+       uint8_t conf_data[10] = {0x12, 0xFF, 0xFF, 0xFF, 0x7F, 0x1F, 0xFF, 0x3C, 0x00, 0x00};
+       AppendCrc(conf_data, 8);
+
+       // e-Purse (block 2)
        // 18: Takes 2 bytes for SOF/EOF and 8 * 2 = 16 bytes (2 bytes/bit)
-       uint8_t *resp_cc = BigBuf_malloc(20);
+       uint8_t *resp_cc = BigBuf_malloc(18);
        int resp_cc_len;
 
+       // Kd, Kc (blocks 3 and 4). Cannot be read. Always respond with 0xff bytes only
+       uint8_t *resp_ff = BigBuf_malloc(22);
+       int resp_ff_len;
+       uint8_t ff_data[10] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00};
+       AppendCrc(ff_data, 8);
+
+       // Application Issuer Area (block 5)
+       uint8_t *resp_aia = BigBuf_malloc(22);
+       int resp_aia_len;
+       uint8_t aia_data[10] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00};
+       AppendCrc(aia_data, 8);
+
        uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE);
        int len;
 
        // Prepare card messages
        ToSendMax = 0;
 
-       // First card answer: SOF
+       // First card answer: SOF only
        CodeIClassTagSOF();
        memcpy(resp_sof, ToSend, ToSendMax);
        resp_sof_Len = ToSendMax;
 
        // Anticollision CSN
-       CodeIClassTagAnswer(anticoll_data, sizeof(anticoll_data));
+       CodeIso15693AsTag(anticoll_data, sizeof(anticoll_data));
        memcpy(resp_anticoll, ToSend, ToSendMax);
        resp_anticoll_len = ToSendMax;
 
-       // CSN
-       CodeIClassTagAnswer(csn_data, sizeof(csn_data));
+       // CSN (block 0)
+       CodeIso15693AsTag(csn_data, sizeof(csn_data));
        memcpy(resp_csn, ToSend, ToSendMax);
        resp_csn_len = ToSendMax;
 
-       // e-Purse
-       CodeIClassTagAnswer(card_challenge_data, sizeof(card_challenge_data));
-       memcpy(resp_cc, ToSend, ToSendMax); resp_cc_len = ToSendMax;
+       // Configuration (block 1)
+       CodeIso15693AsTag(conf_data, sizeof(conf_data));
+       memcpy(resp_conf, ToSend, ToSendMax);
+       resp_conf_len = ToSendMax;
 
-       //This is used for responding to READ-block commands or other data which is dynamically generated
-       //First the 'trace'-data, not encoded for FPGA
-       uint8_t *data_generic_trace = BigBuf_malloc(8 + 2);//8 bytes data + 2byte CRC is max tag answer
-       //Then storage for the modulated data
-       //Each bit is doubled when modulated for FPGA, and we also have SOF and EOF (2 bytes)
-       uint8_t *data_response = BigBuf_malloc( (8+2) * 2 + 2);
+       // e-Purse (block 2)
+       CodeIso15693AsTag(card_challenge_data, sizeof(card_challenge_data));
+       memcpy(resp_cc, ToSend, ToSendMax);
+       resp_cc_len = ToSendMax;
 
-       // Start from off (no field generated)
-       //FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-       //SpinDelay(200);
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN);
-       SpinDelay(100);
-       StartCountSspClk();
-       // We need to listen to the high-frequency, peak-detected path.
-       SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
-       FpgaSetupSsc(FPGA_MAJOR_MODE_HF_ISO14443A);
+       // Kd, Kc (blocks 3 and 4)
+       CodeIso15693AsTag(ff_data, sizeof(ff_data));
+       memcpy(resp_ff, ToSend, ToSendMax);
+       resp_ff_len = ToSendMax;
 
-       // To control where we are in the protocol
-       int cmdsRecvd = 0;
-       uint32_t time_0 = GetCountSspClk();
-       uint32_t t2r_time =0;
-       uint32_t r2t_time =0;
+       // Application Issuer Area (block 5)
+       CodeIso15693AsTag(aia_data, sizeof(aia_data));
+       memcpy(resp_aia, ToSend, ToSendMax);
+       resp_aia_len = ToSendMax;
+
+       //This is used for responding to READ-block commands or other data which is dynamically generated
+       uint8_t *data_generic_trace = BigBuf_malloc(32 + 2); // 32 bytes data + 2byte CRC is max tag answer
+       uint8_t *data_response = BigBuf_malloc( (32 + 2) * 2 + 2);
 
        LED_A_ON();
        bool buttonPressed = false;
-       uint8_t response_delay = 1;
+       enum { IDLE, ACTIVATED, SELECTED, HALTED } chip_state = IDLE;
+
        while (!exitLoop) {
-               response_delay = 1;
+               WDT_HIT();
                LED_B_OFF();
                //Signal tracer
                // Can be used to get a trigger for an oscilloscope..
                LED_C_OFF();
 
-               if (!GetIClassCommandFromReader(receivedCmd, &len, 100)) {
+               uint32_t reader_eof_time = 0;
+               len = GetIso15693CommandFromReader(receivedCmd, MAX_FRAME_SIZE, &reader_eof_time);
+               if (len < 0) {
                        buttonPressed = true;
                        break;
                }
-               r2t_time = GetCountSspClk();
+
                //Signal tracer
                LED_C_ON();
 
-               // Okay, look at the command now.
-               if (receivedCmd[0] == ICLASS_CMD_ACTALL) {
-                       // Reader in anticollission phase
-                       modulated_response = resp_sof;
-                       modulated_response_size = resp_sof_Len; //order = 1;
-                       trace_data = sof_data;
-                       trace_data_size = sizeof(sof_data);
-               } else if (receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 1) {
-                       // Reader asks for anticollission CSN
-                       modulated_response = resp_anticoll;
-                       modulated_response_size = resp_anticoll_len; //order = 2;
-                       trace_data = anticoll_data;
-                       trace_data_size = sizeof(anticoll_data);
-                       //DbpString("Reader requests anticollission CSN:");
-               } else if (receivedCmd[0] == ICLASS_CMD_SELECT) {
-                       // Reader selects anticollission CSN.
+               // Now look at the reader command and provide appropriate responses
+               // default is no response:
+               modulated_response = NULL;
+               modulated_response_size = 0;
+               trace_data = NULL;
+               trace_data_size = 0;
+
+               if (receivedCmd[0] == ICLASS_CMD_ACTALL && len == 1) {
+                       // Reader in anticollision phase
+                       if (chip_state != HALTED) {
+                               modulated_response = resp_sof;
+                               modulated_response_size = resp_sof_Len;
+                               trace_data = sof_data;
+                               trace_data_size = sizeof(sof_data);
+                               chip_state = ACTIVATED;
+                       }
+
+               } else if (receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 1) { // identify
+                       // Reader asks for anticollision CSN
+                       if (chip_state == SELECTED || chip_state == ACTIVATED) {
+                               modulated_response = resp_anticoll;
+                               modulated_response_size = resp_anticoll_len;
+                               trace_data = anticoll_data;
+                               trace_data_size = sizeof(anticoll_data);
+                       }
+
+               } else if (receivedCmd[0] == ICLASS_CMD_SELECT && len == 9) {
+                       // Reader selects anticollision CSN.
                        // Tag sends the corresponding real CSN
-                       modulated_response = resp_csn;
-                       modulated_response_size = resp_csn_len; //order = 3;
-                       trace_data = csn_data;
-                       trace_data_size = sizeof(csn_data);
-                       //DbpString("Reader selects anticollission CSN:");
-               } else if (receivedCmd[0] == ICLASS_CMD_READCHECK_KD) {
-                       // Read e-purse (88 02)
-                       modulated_response = resp_cc;
-                       modulated_response_size = resp_cc_len; //order = 4;
-                       trace_data = card_challenge_data;
-                       trace_data_size = sizeof(card_challenge_data);
-                       LED_B_ON();
-               } else if (receivedCmd[0] == ICLASS_CMD_CHECK) {
+                       if (chip_state == ACTIVATED || chip_state == SELECTED) {
+                               if (!memcmp(receivedCmd+1, anticoll_data, 8)) {
+                                       modulated_response = resp_csn;
+                                       modulated_response_size = resp_csn_len;
+                                       trace_data = csn_data;
+                                       trace_data_size = sizeof(csn_data);
+                                       chip_state = SELECTED;
+                               } else {
+                                       chip_state = IDLE;
+                               }
+                       } else if (chip_state == HALTED) {
+                               // RESELECT with CSN
+                               if (!memcmp(receivedCmd+1, csn_data, 8)) {
+                                       modulated_response = resp_csn;
+                                       modulated_response_size = resp_csn_len;
+                                       trace_data = csn_data;
+                                       trace_data_size = sizeof(csn_data);
+                                       chip_state = SELECTED;
+                               }
+                       }
+
+               } else if (receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 4) { // read block
+                       uint16_t blockNo = receivedCmd[1];
+                       if (chip_state == SELECTED) {
+                               if (simulationMode == ICLASS_SIM_MODE_EXIT_AFTER_MAC) {
+                                       // provide defaults for blocks 0 ... 5
+                                       switch (blockNo) {
+                                               case 0: // csn (block 00)
+                                                       modulated_response = resp_csn;
+                                                       modulated_response_size = resp_csn_len;
+                                                       trace_data = csn_data;
+                                                       trace_data_size = sizeof(csn_data);
+                                                       break;
+                                               case 1: // configuration (block 01)
+                                                       modulated_response = resp_conf;
+                                                       modulated_response_size = resp_conf_len;
+                                                       trace_data = conf_data;
+                                                       trace_data_size = sizeof(conf_data);
+                                                       break;
+                                               case 2: // e-purse (block 02)
+                                                       modulated_response = resp_cc;
+                                                       modulated_response_size = resp_cc_len;
+                                                       trace_data = card_challenge_data;
+                                                       trace_data_size = sizeof(card_challenge_data);
+                                                       // set epurse of sim2,4 attack
+                                                       if (reader_mac_buf != NULL) {
+                                                               memcpy(reader_mac_buf, card_challenge_data, 8);
+                                                       }
+                                                       break;
+                                               case 3:
+                                               case 4: // Kd, Kc, always respond with 0xff bytes
+                                                       modulated_response = resp_ff;
+                                                       modulated_response_size = resp_ff_len;
+                                                       trace_data = ff_data;
+                                                       trace_data_size = sizeof(ff_data);
+                                                       break;
+                                               case 5: // Application Issuer Area (block 05)
+                                                       modulated_response = resp_aia;
+                                                       modulated_response_size = resp_aia_len;
+                                                       trace_data = aia_data;
+                                                       trace_data_size = sizeof(aia_data);
+                                                       break;
+                                               // default: don't respond
+                                       }
+                               } else if (simulationMode == ICLASS_SIM_MODE_FULL) {
+                                       if (blockNo == 3 || blockNo == 4) { // Kd, Kc, always respond with 0xff bytes
+                                               modulated_response = resp_ff;
+                                               modulated_response_size = resp_ff_len;
+                                               trace_data = ff_data;
+                                               trace_data_size = sizeof(ff_data);
+                                       } else { // use data from emulator memory
+                                               memcpy(data_generic_trace, emulator + 8*blockNo, 8);
+                                               AppendCrc(data_generic_trace, 8);
+                                               trace_data = data_generic_trace;
+                                               trace_data_size = 10;
+                                               CodeIso15693AsTag(trace_data, trace_data_size);
+                                               memcpy(data_response, ToSend, ToSendMax);
+                                               modulated_response = data_response;
+                                               modulated_response_size = ToSendMax;
+                                       }
+                               }
+                       }
+
+               } else if ((receivedCmd[0] == ICLASS_CMD_READCHECK_KD
+                                       || receivedCmd[0] == ICLASS_CMD_READCHECK_KC) && len == 2) {
+                       // Read e-purse (88 02 || 18 02)
+                       if (chip_state == SELECTED) {
+                               modulated_response = resp_cc;
+                               modulated_response_size = resp_cc_len;
+                               trace_data = card_challenge_data;
+                               trace_data_size = sizeof(card_challenge_data);
+                               LED_B_ON();
+                       }
+
+               } else if (receivedCmd[0] == ICLASS_CMD_CHECK && len == 9) {
                        // Reader random and reader MAC!!!
-                       if (simulationMode == MODE_FULLSIM) {
-                               //NR, from reader, is in receivedCmd +1
-                               opt_doTagMAC_2(cipher_state, receivedCmd+1, data_generic_trace, diversified_key);
+                       if (chip_state == SELECTED) {
+                               if (simulationMode == ICLASS_SIM_MODE_FULL) {
+                                       //NR, from reader, is in receivedCmd+1
+                                       opt_doTagMAC_2(cipher_state, receivedCmd+1, data_generic_trace, diversified_key);
+                                       trace_data = data_generic_trace;
+                                       trace_data_size = 4;
+                                       CodeIso15693AsTag(trace_data, trace_data_size);
+                                       memcpy(data_response, ToSend, ToSendMax);
+                                       modulated_response = data_response;
+                                       modulated_response_size = ToSendMax;
+                                       //exitLoop = true;
+                               } else { // Not fullsim, we don't respond
+                                       // We do not know what to answer, so lets keep quiet
+                                       if (simulationMode == ICLASS_SIM_MODE_EXIT_AFTER_MAC) {
+                                               if (reader_mac_buf != NULL) {
+                                                       // save NR and MAC for sim 2,4
+                                                       memcpy(reader_mac_buf + 8, receivedCmd + 1, 8);
+                                               }
+                                               exitLoop = true;
+                                       }
+                               }
+                       }
+
+               } else if (receivedCmd[0] == ICLASS_CMD_HALT && len == 1) {
+                       if (chip_state == SELECTED) {
+                               // Reader ends the session
+                               chip_state = HALTED;
+                       }
 
+               } else if (simulationMode == ICLASS_SIM_MODE_FULL && receivedCmd[0] == ICLASS_CMD_READ4 && len == 4) {  // 0x06
+                       //Read 4 blocks
+                       if (chip_state == SELECTED) {
+                               memcpy(data_generic_trace, emulator + (receivedCmd[1] << 3), 8 * 4);
+                               AppendCrc(data_generic_trace, 8 * 4);
                                trace_data = data_generic_trace;
-                               trace_data_size = 4;
-                               CodeIClassTagAnswer(trace_data, trace_data_size);
+                               trace_data_size = 8 * 4 + 2;
+                               CodeIso15693AsTag(trace_data, trace_data_size);
                                memcpy(data_response, ToSend, ToSendMax);
                                modulated_response = data_response;
                                modulated_response_size = ToSendMax;
-                               response_delay = 0; //We need to hurry here... (but maybe not too much... ??)
-                               //exitLoop = true;
-                       } else {    //Not fullsim, we don't respond
-                               // We do not know what to answer, so lets keep quiet
-                               modulated_response = resp_sof;
-                               modulated_response_size = 0;
-                               trace_data = NULL;
-                               trace_data_size = 0;
-                               if (simulationMode == MODE_EXIT_AFTER_MAC) {
-                                       // dbprintf:ing ...
-                                       Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x"
-                                                          ,csn[0],csn[1],csn[2],csn[3],csn[4],csn[5],csn[6],csn[7]);
-                                       Dbprintf("RDR:  (len=%02d): %02x %02x %02x %02x %02x %02x %02x %02x %02x",len,
-                                                       receivedCmd[0], receivedCmd[1], receivedCmd[2],
-                                                       receivedCmd[3], receivedCmd[4], receivedCmd[5],
-                                                       receivedCmd[6], receivedCmd[7], receivedCmd[8]);
-                                       if (reader_mac_buf != NULL) {
-                                               memcpy(reader_mac_buf, receivedCmd+1, 8);
-                                       }
-                                       exitLoop = true;
-                               }
                        }
 
-               } else if (receivedCmd[0] == ICLASS_CMD_HALT && len == 1) {
-                       // Reader ends the session
-                       modulated_response = resp_sof;
-                       modulated_response_size = 0; //order = 0;
-                       trace_data = NULL;
-                       trace_data_size = 0;
-               } else if (simulationMode == MODE_FULLSIM && receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 4) {
-                       //Read block
-                       uint16_t blk = receivedCmd[1];
-                       //Take the data...
-                       memcpy(data_generic_trace, emulator + (blk << 3), 8);
-                       //Add crc
-                       AppendCrc(data_generic_trace, 8);
-                       trace_data = data_generic_trace;
-                       trace_data_size = 10;
-                       CodeIClassTagAnswer(trace_data, trace_data_size);
-                       memcpy(data_response, ToSend, ToSendMax);
-                       modulated_response = data_response;
-                       modulated_response_size = ToSendMax;
-               } else if (receivedCmd[0] == ICLASS_CMD_UPDATE && simulationMode == MODE_FULLSIM) {
-                       //Probably the reader wants to update the nonce. Let's just ignore that for now.
+               } else if (receivedCmd[0] == ICLASS_CMD_UPDATE && (len == 12 || len == 14)) {
+                       // Probably the reader wants to update the nonce. Let's just ignore that for now.
                        // OBS! If this is implemented, don't forget to regenerate the cipher_state
-                       //We're expected to respond with the data+crc, exactly what's already in the receivedcmd
-                       //receivedcmd is now UPDATE 1b | ADDRESS 1b| DATA 8b| Signature 4b or CRC 2b|
-
-                       //Take the data...
-                       memcpy(data_generic_trace, receivedCmd+2, 8);
-                       //Add crc
-                       AppendCrc(data_generic_trace, 8);
-                       trace_data = data_generic_trace;
-                       trace_data_size = 10;
-                       CodeIClassTagAnswer(trace_data, trace_data_size);
-                       memcpy(data_response, ToSend, ToSendMax);
-                       modulated_response = data_response;
-                       modulated_response_size = ToSendMax;
-               } else if (receivedCmd[0] == ICLASS_CMD_PAGESEL) {
-                       //Pagesel
-                       //Pagesel enables to select a page in the selected chip memory and return its configuration block
-                       //Chips with a single page will not answer to this command
-                       // It appears we're fine ignoring this.
-                       //Otherwise, we should answer 8bytes (block) + 2bytes CRC
+                       // We're expected to respond with the data+crc, exactly what's already in the receivedCmd
+                       // receivedCmd is now UPDATE 1b | ADDRESS 1b | DATA 8b | Signature 4b or CRC 2b
+                       if (chip_state == SELECTED) {
+                               memcpy(data_generic_trace, receivedCmd + 2, 8);
+                               AppendCrc(data_generic_trace, 8);
+                               trace_data = data_generic_trace;
+                               trace_data_size = 10;
+                               CodeIso15693AsTag(trace_data, trace_data_size);
+                               memcpy(data_response, ToSend, ToSendMax);
+                               modulated_response = data_response;
+                               modulated_response_size = ToSendMax;
+                       }
+
+               } else if (receivedCmd[0] == ICLASS_CMD_PAGESEL && len == 4) {
+                       // Pagesel
+                       if (chip_state == SELECTED) {
+                               // Pagesel enables to select a page in the selected chip memory and return its configuration block
+                               // Chips with a single page will not answer to this command
+                               // It appears we're fine ignoring this.
+                               // Otherwise, we should answer 8bytes (block) + 2bytes CRC
+                       }
+
                } else {
-                       //#db# Unknown command received from reader (len=5): 26 1 0 f6 a 44 44 44 44
-                       // Never seen this command before
-                       Dbprintf("Unknown command received from reader (len=%d): %x %x %x %x %x %x %x %x %x",
-                       len,
-                       receivedCmd[0], receivedCmd[1], receivedCmd[2],
-                       receivedCmd[3], receivedCmd[4], receivedCmd[5],
-                       receivedCmd[6], receivedCmd[7], receivedCmd[8]);
+                       // don't know how to handle this command
+                       char debug_message[250]; // should be enough
+                       sprintf(debug_message, "Unhandled command (len = %d) received from reader:", len);
+                       for (int i = 0; i < len && strlen(debug_message) < sizeof(debug_message) - 3 - 1; i++) {
+                               sprintf(debug_message + strlen(debug_message), " %02x", receivedCmd[i]);
+                       }
+                       Dbprintf("%s", debug_message);
                        // Do not respond
-                       modulated_response = resp_sof;
-                       modulated_response_size = 0; //order = 0;
-                       trace_data = NULL;
-                       trace_data_size = 0;
                }
 
-               if (cmdsRecvd >  100) {
-                       //DbpString("100 commands later...");
-                       //break;
-               } else {
-                       cmdsRecvd++;
-               }
                /**
-               A legit tag has about 380us delay between reader EOT and tag SOF.
+               A legit tag has about 311,5us delay between reader EOT and tag SOF.
                **/
                if (modulated_response_size > 0) {
-                       SendIClassAnswer(modulated_response, modulated_response_size, response_delay);
-                       t2r_time = GetCountSspClk();
+                       uint32_t response_time = reader_eof_time + DELAY_ISO15693_VCD_TO_VICC_SIM - DELAY_ARM_TO_READER_SIM;
+                       TransmitTo15693Reader(modulated_response, modulated_response_size, response_time, false);
+                       LogTrace(trace_data, trace_data_size, response_time + DELAY_ARM_TO_READER_SIM, response_time + (modulated_response_size << 6) + DELAY_ARM_TO_READER_SIM, NULL, false);
                }
 
-               uint8_t parity[MAX_PARITY_SIZE];
-               GetParity(receivedCmd, len, parity);
-               LogTrace(receivedCmd, len, (r2t_time-time_0) << 4, (r2t_time-time_0) << 4, parity, true);
-
-               if (trace_data != NULL) {
-                       GetParity(trace_data, trace_data_size, parity);
-                       LogTrace(trace_data, trace_data_size, (t2r_time-time_0) << 4, (t2r_time-time_0) << 4, parity, false);
-               }
-               if (!get_tracing()) {
-                       DbpString("Trace full");
-                       //break;
-               }
        }
 
-       //Dbprintf("%x", cmdsRecvd);
        LED_A_OFF();
        LED_B_OFF();
        LED_C_OFF();
@@ -1280,7 +1176,13 @@ int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) {
 void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain) {
        uint32_t simType = arg0;
        uint32_t numberOfCSNS = arg1;
+
+       // setup hardware for simulation:
        FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+       SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_NO_MODULATION);
+       FpgaSetupSsc(FPGA_MAJOR_MODE_HF_SIMULATOR);
+       StartCountSspClk();
 
        // Enable and clear the trace
        set_tracing(true);
@@ -1288,35 +1190,42 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain
        //Use the emulator memory for SIM
        uint8_t *emulator = BigBuf_get_EM_addr();
 
-       if (simType == 0) {
+       if (simType == ICLASS_SIM_MODE_CSN) {
                // Use the CSN from commandline
                memcpy(emulator, datain, 8);
-               doIClassSimulation(MODE_SIM_CSN,NULL);
-       } else if (simType == 1) {
+               doIClassSimulation(ICLASS_SIM_MODE_CSN, NULL);
+       } else if (simType == ICLASS_SIM_MODE_CSN_DEFAULT) {
                //Default CSN
                uint8_t csn_crc[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 0x00, 0x00 };
                // Use the CSN from commandline
                memcpy(emulator, csn_crc, 8);
-               doIClassSimulation(MODE_SIM_CSN,NULL);
-       } else if (simType == 2) {
+               doIClassSimulation(ICLASS_SIM_MODE_CSN, NULL);
+       } else if (simType == ICLASS_SIM_MODE_READER_ATTACK) {
                uint8_t mac_responses[USB_CMD_DATA_SIZE] = { 0 };
                Dbprintf("Going into attack mode, %d CSNS sent", numberOfCSNS);
                // In this mode, a number of csns are within datain. We'll simulate each one, one at a time
-               // in order to collect MAC's from the reader. This can later be used in an offlne-attack
+               // in order to collect MAC's from the reader. This can later be used in an offline-attack
                // in order to obtain the keys, as in the "dismantling iclass"-paper.
-               int i = 0;
-               for ( ; i < numberOfCSNS && i*8+8 < USB_CMD_DATA_SIZE; i++) {
-                       // The usb data is 512 bytes, fitting 65 8-byte CSNs in there.
+               int i;
+               for (i = 0; i < numberOfCSNS && i*16+16 <= USB_CMD_DATA_SIZE; i++) {
+                       // The usb data is 512 bytes, fitting 32 responses (8 byte CC + 4 Byte NR + 4 Byte MAC = 16 Byte response).
                        memcpy(emulator, datain+(i*8), 8);
-                       if (doIClassSimulation(MODE_EXIT_AFTER_MAC,mac_responses+i*8)) {
-                               cmd_send(CMD_ACK, CMD_SIMULATE_TAG_ICLASS, i, 0, mac_responses, i*8);
-                               return; // Button pressed
+                       if (doIClassSimulation(ICLASS_SIM_MODE_EXIT_AFTER_MAC, mac_responses+i*16)) {
+                                // Button pressed
+                                break;
                        }
+                       Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x",
+                                       datain[i*8+0], datain[i*8+1], datain[i*8+2], datain[i*8+3],
+                                       datain[i*8+4], datain[i*8+5], datain[i*8+6], datain[i*8+7]);
+                       Dbprintf("NR,MAC: %02x %02x %02x %02x %02x %02x %02x %02x",
+                                       mac_responses[i*16+ 8], mac_responses[i*16+ 9], mac_responses[i*16+10], mac_responses[i*16+11],
+                                       mac_responses[i*16+12], mac_responses[i*16+13], mac_responses[i*16+14], mac_responses[i*16+15]);
+                       SpinDelay(100); // give the reader some time to prepare for next CSN
                }
-               cmd_send(CMD_ACK, CMD_SIMULATE_TAG_ICLASS, i, 0, mac_responses, i*8);
-       } else if (simType == 3) {
+               cmd_send(CMD_ACK, CMD_SIMULATE_TAG_ICLASS, i, 0, mac_responses, i*16);
+       } else if (simType == ICLASS_SIM_MODE_FULL) {
                //This is 'full sim' mode, where we use the emulator storage for data.
-               doIClassSimulation(MODE_FULLSIM, NULL);
+               doIClassSimulation(ICLASS_SIM_MODE_FULL, NULL);
        } else {
                // We may want a mode here where we hardcode the csns to use (from proxclone).
                // That will speed things up a little, but not required just yet.
@@ -1479,10 +1388,10 @@ static int GetIClassAnswer(uint8_t *receivedResponse, int maxLen, int *samples,
                        if (elapsed) (*elapsed)++;
                }
                if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
-                       if (c < timeout) { 
-                               c++; 
-                       } else { 
-                               return false; 
+                       if (c < timeout) {
+                               c++;
+                       } else {
+                               return false;
                        }
                        b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
                        skip = !skip;
@@ -1683,10 +1592,10 @@ void ReaderIClass(uint8_t arg0) {
                // 0 : CSN
                // 1 : Configuration
                // 2 : e-purse
-               // (3,4 write-only, kc and kd)
-               // 5 Application issuer area
-               //
-               //Then we can 'ship' back the 8 * 6 bytes of data,
+               // 3 : kd / debit / aa2 (write-only)
+               // 4 : kc / credit / aa1 (write-only)
+               // 5 : AIA, Application issuer area
+               //Then we can 'ship' back the 6 * 8 bytes of data,
                // with 0xFF:s in block 3 and 4.
 
                LED_B_ON();
index f412051290094fba180cccaece08f5a66bf82f03..f33e0156cda0614154f45bc56694b1828dc39c86 100644 (file)
@@ -2,7 +2,7 @@
 // Jonathan Westhues, split Nov 2006
 // Modified by Greg Jones, Jan 2009
 // Modified by Adrian Dabrowski "atrox", Mar-Sept 2010,Oct 2011
-// Modified by piwi, Oct 2018 
+// Modified by piwi, Oct 2018
 //
 // 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
 // transmission modes from tag to reader. As of Oct 2018 this code supports
 // both reader modes and the high speed variant with one subcarrier from card to reader.
 // As long as the card fully support ISO 15693 this is no problem, since the
-// reader chooses both data rates, but some non-standard tags do not. 
+// reader chooses both data rates, but some non-standard tags do not.
 // For card simulation, the code supports both high and low speed modes with one subcarrier.
 //
 // VCD (reader) -> VICC (tag)
 // 1 out of 256:
-//     data rate: 1,66 kbit/s (fc/8192)
-//     used for long range
+//  data rate: 1,66 kbit/s (fc/8192)
+//  used for long range
 // 1 out of 4:
-//     data rate: 26,48 kbit/s (fc/512)
-//     used for short range, high speed
+//  data rate: 26,48 kbit/s (fc/512)
+//  used for short range, high speed
 //
 // VICC (tag) -> VCD (reader)
 // Modulation:
-//             ASK / one subcarrier (423,75 khz)
-//             FSK / two subcarriers (423,75 khz && 484,28 khz)
+//      ASK / one subcarrier (423,75 khz)
+//      FSK / two subcarriers (423,75 khz && 484,28 khz)
 // Data Rates / Modes:
-//     low ASK: 6,62 kbit/s
-//     low FSK: 6.67 kbit/s
-//     high ASK: 26,48 kbit/s
-//     high FSK: 26,69 kbit/s
+//  low ASK: 6,62 kbit/s
+//  low FSK: 6.67 kbit/s
+//  high ASK: 26,48 kbit/s
+//  high FSK: 26,69 kbit/s
 //-----------------------------------------------------------------------------
 
 
@@ -68,27 +68,14 @@ static int DEBUG = 0;
 
 ///////////////////////////////////////////////////////////////////////
 // ISO 15693 Part 2 - Air Interface
-// This section basicly contains transmission and receiving of bits
+// This section basically contains transmission and receiving of bits
 ///////////////////////////////////////////////////////////////////////
 
-#define Crc(data,datalen)     Iso15693Crc(data,datalen)
-#define AddCrc(data,datalen)  Iso15693AddCrc(data,datalen)
-#define sprintUID(target,uid)  Iso15693sprintUID(target,uid)
-
 // buffers
-#define ISO15693_DMA_BUFFER_SIZE        2048 // must be a power of 2
+#define ISO15693_DMA_BUFFER_SIZE       2048 // must be a power of 2
 #define ISO15693_MAX_RESPONSE_LENGTH     36 // allows read single block with the maximum block size of 256bits. Read multiple blocks not supported yet
 #define ISO15693_MAX_COMMAND_LENGTH      45 // allows write single block with the maximum block size of 256bits. Write multiple blocks not supported yet
 
-// timing. Delays in SSP_CLK ticks. 
-// SSP_CLK runs at 13,56MHz / 32 = 423.75kHz when simulating a tag
-#define DELAY_READER_TO_ARM_SIM           8
-#define DELAY_ARM_TO_READER_SIM           1
-#define DELAY_ISO15693_VCD_TO_VICC_SIM    132  // 132/423.75kHz = 311.5us from end of command EOF to start of tag response
-//SSP_CLK runs at 13.56MHz / 4 = 3,39MHz when acting as reader
-#define DELAY_ISO15693_VCD_TO_VICC_READER 1056 // 1056/3,39MHz = 311.5us from end of command EOF to start of tag response
-#define DELAY_ISO15693_VICC_TO_VCD_READER 1017 // 1017/3.39MHz = 300us between end of tag response and next reader command
-
 // ---------------------------
 // Signal Processing
 // ---------------------------
@@ -174,7 +161,7 @@ static void CodeIso15693AsReader(uint8_t *cmd, int n)
        for(i = 0; i < 4; i++) {
                ToSendStuffBit(1);
        }
-       
+
        ToSendMax++;
 }
 
@@ -228,22 +215,72 @@ static void CodeIso15693AsReader256(uint8_t *cmd, int n)
 }
 
 
-static void CodeIso15693AsTag(uint8_t *cmd, int n)
-{
+// static uint8_t encode4Bits(const uint8_t b) {
+       // uint8_t c = b & 0xF;
+       // // OTA, the least significant bits first
+       // //         The columns are
+       // //               1 - Bit value to send
+       // //               2 - Reversed (big-endian)
+       // //               3 - Manchester Encoded
+       // //               4 - Hex values
+
+       // switch(c){
+       // //                          1       2         3         4
+         // case 15: return 0x55; // 1111 -> 1111 -> 01010101 -> 0x55
+         // case 14: return 0x95; // 1110 -> 0111 -> 10010101 -> 0x95
+         // case 13: return 0x65; // 1101 -> 1011 -> 01100101 -> 0x65
+         // case 12: return 0xa5; // 1100 -> 0011 -> 10100101 -> 0xa5
+         // case 11: return 0x59; // 1011 -> 1101 -> 01011001 -> 0x59
+         // case 10: return 0x99; // 1010 -> 0101 -> 10011001 -> 0x99
+         // case 9:  return 0x69; // 1001 -> 1001 -> 01101001 -> 0x69
+         // case 8:  return 0xa9; // 1000 -> 0001 -> 10101001 -> 0xa9
+         // case 7:  return 0x56; // 0111 -> 1110 -> 01010110 -> 0x56
+         // case 6:  return 0x96; // 0110 -> 0110 -> 10010110 -> 0x96
+         // case 5:  return 0x66; // 0101 -> 1010 -> 01100110 -> 0x66
+         // case 4:  return 0xa6; // 0100 -> 0010 -> 10100110 -> 0xa6
+         // case 3:  return 0x5a; // 0011 -> 1100 -> 01011010 -> 0x5a
+         // case 2:  return 0x9a; // 0010 -> 0100 -> 10011010 -> 0x9a
+         // case 1:  return 0x6a; // 0001 -> 1000 -> 01101010 -> 0x6a
+         // default: return 0xaa; // 0000 -> 0000 -> 10101010 -> 0xaa
+
+       // }
+// }
+
+void CodeIso15693AsTag(uint8_t *cmd, size_t len) {
+       /*
+        * SOF comprises 3 parts;
+        * * An unmodulated time of 56.64 us
+        * * 24 pulses of 423.75 kHz (fc/32)
+        * * A logic 1, which starts with an unmodulated time of 18.88us
+        *   followed by 8 pulses of 423.75kHz (fc/32)
+        *
+        * EOF comprises 3 parts:
+        * - A logic 0 (which starts with 8 pulses of fc/32 followed by an unmodulated
+        *   time of 18.88us.
+        * - 24 pulses of fc/32
+        * - An unmodulated time of 56.64 us
+        *
+        * A logic 0 starts with 8 pulses of fc/32
+        * followed by an unmodulated time of 256/fc (~18,88us).
+        *
+        * A logic 0 starts with unmodulated time of 256/fc (~18,88us) followed by
+        * 8 pulses of fc/32 (also 18.88us)
+        *
+        * A bit here becomes 8 pulses of fc/32. Therefore:
+        * The SOF can be written as 00011101 = 0x1D
+        * The EOF can be written as 10111000 = 0xb8
+        * A logic 1 is 01
+        * A logic 0 is 10
+        *
+        * */
+
        ToSendReset();
 
        // SOF
-       ToSendStuffBit(0);
-       ToSendStuffBit(0);
-       ToSendStuffBit(0);
-       ToSendStuffBit(1);
-       ToSendStuffBit(1);
-       ToSendStuffBit(1);
-       ToSendStuffBit(0);
-       ToSendStuffBit(1);
+       ToSend[++ToSendMax] = 0x1D;  // 00011101
 
        // data
-       for(int i = 0; i < n; i++) {
+       for(int i = 0; i < len; i++) {
                for(int j = 0; j < 8; j++) {
                        if ((cmd[i] >> j) & 0x01) {
                                        ToSendStuffBit(0);
@@ -256,14 +293,7 @@ static void CodeIso15693AsTag(uint8_t *cmd, int n)
        }
 
        // EOF
-       ToSendStuffBit(1);
-       ToSendStuffBit(0);
-       ToSendStuffBit(1);
-       ToSendStuffBit(1);
-       ToSendStuffBit(1);
-       ToSendStuffBit(0);
-       ToSendStuffBit(0);
-       ToSendStuffBit(0);
+       ToSend[++ToSendMax] = 0xB8; // 10111000
 
        ToSendMax++;
 }
@@ -297,41 +327,41 @@ static void TransmitTo15693Tag(const uint8_t *cmd, int len, uint32_t start_time)
 //-----------------------------------------------------------------------------
 // Transmit the tag response (to the reader) that was placed in cmd[].
 //-----------------------------------------------------------------------------
-static void TransmitTo15693Reader(const uint8_t *cmd, size_t len, uint32_t start_time, bool slow)
-{
+void TransmitTo15693Reader(const uint8_t *cmd, size_t len, uint32_t start_time, bool slow) {
        // don't use the FPGA_HF_SIMULATOR_MODULATE_424K_8BIT minor mode. It would spoil GetCountSspClk()
        FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_MODULATE_424K);
 
        uint8_t shift_delay = start_time & 0x00000007;
-       uint8_t bitmask = 0x00;
-       for (int i = 0; i < shift_delay; i++) {
-               bitmask |= (0x01 << i);
-       }
 
        while (GetCountSspClk() < (start_time & 0xfffffff8)) ;
 
-       AT91C_BASE_SSC->SSC_THR = 0x00; // clear TXRDY
-
        LED_C_ON();
        uint8_t bits_to_shift = 0x00;
-    for(size_t c = 0; c <= len; c++) {
-               uint8_t bits_to_send = bits_to_shift << (8 - shift_delay) | (c==len?0x00:cmd[c]) >> shift_delay;
-               bits_to_shift = cmd[c] & bitmask;
+       uint8_t bits_to_send = 0x00;
+       for(size_t c = 0; c < len; c++) {
                for (int i = 7; i >= 0; i--) {
+                       uint8_t cmd_bits = ((cmd[c] >> i) & 0x01) ? 0xff : 0x00;
                        for (int j = 0; j < (slow?4:1); ) {
                                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
-                                       if (bits_to_send >> i & 0x01) {
-                                               AT91C_BASE_SSC->SSC_THR = 0xff;
-                                       } else {
-                                               AT91C_BASE_SSC->SSC_THR = 0x00;
-                                       }
+                                       bits_to_send = bits_to_shift << (8 - shift_delay) | cmd_bits >> shift_delay;
+                                       AT91C_BASE_SSC->SSC_THR = bits_to_send;
+                                       bits_to_shift = cmd_bits;
                                        j++;
                                }
-                               WDT_HIT();
                        }
-        }
-    }
+               }
+               WDT_HIT();
+       }
+       // send the remaining bits, padded with 0:
+       bits_to_send = bits_to_shift << (8 - shift_delay);
+       for ( ; ; ) {
+               if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
+                       AT91C_BASE_SSC->SSC_THR = bits_to_send;
+                       break;
+               }
+       }
        LED_C_OFF();
+
 }
 
 
@@ -378,7 +408,7 @@ typedef struct DecodeTag {
 static int inline __attribute__((always_inline)) Handle15693SamplesFromTag(uint16_t amplitude, DecodeTag_t *DecodeTag)
 {
        switch(DecodeTag->state) {
-               case STATE_TAG_SOF_LOW: 
+               case STATE_TAG_SOF_LOW:
                        // waiting for 12 times low (11 times low is accepted as well)
                        if (amplitude < NOISE_THRESHOLD) {
                                DecodeTag->posCount++;
@@ -392,7 +422,7 @@ static int inline __attribute__((always_inline)) Handle15693SamplesFromTag(uint1
                                }
                        }
                        break;
-                       
+
                case STATE_TAG_SOF_HIGH:
                        // waiting for 10 times high. Take average over the last 8
                        if (amplitude > NOISE_THRESHOLD) {
@@ -562,7 +592,7 @@ static int GetIso15693AnswerFromTag(uint8_t* response, uint16_t max_len, int tim
        bool gotFrame = false;
 
        uint16_t *dmaBuf = (uint16_t*)BigBuf_malloc(ISO15693_DMA_BUFFER_SIZE*sizeof(uint16_t));
-       
+
        // the Decoder data structure
        DecodeTag_t DecodeTag = { 0 };
        DecodeTagInit(&DecodeTag, response, max_len);
@@ -613,9 +643,9 @@ static int GetIso15693AnswerFromTag(uint8_t* response, uint16_t max_len, int tim
 
        FpgaDisableSscDma();
        BigBuf_free();
-       
+
        if (DEBUG) Dbprintf("samples = %d, gotFrame = %d, Decoder: state = %d, len = %d, bitCount = %d, posCount = %d",
-                           samples, gotFrame, DecodeTag.state, DecodeTag.len, DecodeTag.bitCount, DecodeTag.posCount);
+                                               samples, gotFrame, DecodeTag.state, DecodeTag.len, DecodeTag.bitCount, DecodeTag.posCount);
 
        if (DecodeTag.len > 0) {
                LogTrace(DecodeTag.output, DecodeTag.len, 0, 0, NULL, false);
@@ -641,6 +671,7 @@ static int GetIso15693AnswerFromTag(uint8_t* response, uint16_t max_len, int tim
 typedef struct DecodeReader {
        enum {
                STATE_READER_UNSYNCD,
+               STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF,
                STATE_READER_AWAIT_1ST_RISING_EDGE_OF_SOF,
                STATE_READER_AWAIT_2ND_FALLING_EDGE_OF_SOF,
                STATE_READER_AWAIT_2ND_RISING_EDGE_OF_SOF,
@@ -657,7 +688,7 @@ typedef struct DecodeReader {
        int         byteCount;
        int         byteCountMax;
        int         posCount;
-       int                     sum1, sum2;
+       int         sum1, sum2;
        uint8_t     *output;
 } DecodeReader_t;
 
@@ -682,9 +713,16 @@ static void DecodeReaderReset(DecodeReader_t* DecodeReader)
 
 static int inline __attribute__((always_inline)) Handle15693SampleFromReader(uint8_t bit, DecodeReader_t *restrict DecodeReader)
 {
-       switch(DecodeReader->state) {
+       switch (DecodeReader->state) {
                case STATE_READER_UNSYNCD:
-                       if(!bit) {
+                       // wait for unmodulated carrier
+                       if (bit) {
+                               DecodeReader->state = STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF;
+                       }
+                       break;
+
+               case STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF:
+                       if (!bit) {
                                // we went low, so this could be the beginning of a SOF
                                DecodeReader->posCount = 1;
                                DecodeReader->state = STATE_READER_AWAIT_1ST_RISING_EDGE_OF_SOF;
@@ -693,14 +731,14 @@ static int inline __attribute__((always_inline)) Handle15693SampleFromReader(uin
 
                case STATE_READER_AWAIT_1ST_RISING_EDGE_OF_SOF:
                        DecodeReader->posCount++;
-                       if(bit) { // detected rising edge
-                               if(DecodeReader->posCount < 4) { // rising edge too early (nominally expected at 5)
-                                       DecodeReaderReset(DecodeReader);
+                       if (bit) { // detected rising edge
+                               if (DecodeReader->posCount < 4) { // rising edge too early (nominally expected at 5)
+                                       DecodeReader->state = STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF;
                                } else { // SOF
                                        DecodeReader->state = STATE_READER_AWAIT_2ND_FALLING_EDGE_OF_SOF;
                                }
                        } else {
-                               if(DecodeReader->posCount > 5) { // stayed low for too long
+                               if (DecodeReader->posCount > 5) { // stayed low for too long
                                        DecodeReaderReset(DecodeReader);
                                } else {
                                        // do nothing, keep waiting
@@ -710,7 +748,7 @@ static int inline __attribute__((always_inline)) Handle15693SampleFromReader(uin
 
                case STATE_READER_AWAIT_2ND_FALLING_EDGE_OF_SOF:
                        DecodeReader->posCount++;
-                       if(!bit) { // detected a falling edge
+                       if (!bit) { // detected a falling edge
                                if (DecodeReader->posCount < 20) {         // falling edge too early (nominally expected at 21 earliest)
                                        DecodeReaderReset(DecodeReader);
                                } else if (DecodeReader->posCount < 23) {  // SOF for 1 out of 4 coding
@@ -718,13 +756,13 @@ static int inline __attribute__((always_inline)) Handle15693SampleFromReader(uin
                                        DecodeReader->state = STATE_READER_AWAIT_2ND_RISING_EDGE_OF_SOF;
                                } else if (DecodeReader->posCount < 28) {  // falling edge too early (nominally expected at 29 latest)
                                        DecodeReaderReset(DecodeReader);
-                               } else {                                 // SOF for 1 out of 4 coding
+                               } else {                                   // SOF for 1 out of 256 coding
                                        DecodeReader->Coding = CODING_1_OUT_OF_256;
                                        DecodeReader->state = STATE_READER_AWAIT_2ND_RISING_EDGE_OF_SOF;
                                }
                        } else {
-                               if(DecodeReader->posCount > 29) { // stayed high for too long
-                                       DecodeReaderReset(DecodeReader);
+                               if (DecodeReader->posCount > 29) { // stayed high for too long
+                                       DecodeReader->state = STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF;
                                } else {
                                        // do nothing, keep waiting
                                }
@@ -736,7 +774,7 @@ static int inline __attribute__((always_inline)) Handle15693SampleFromReader(uin
                        if (bit) { // detected rising edge
                                if (DecodeReader->Coding == CODING_1_OUT_OF_256) {
                                        if (DecodeReader->posCount < 32) { // rising edge too early (nominally expected at 33)
-                                       DecodeReaderReset(DecodeReader);
+                                               DecodeReader->state = STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF;
                                        } else {
                                                DecodeReader->posCount = 1;
                                                DecodeReader->bitCount = 0;
@@ -747,21 +785,22 @@ static int inline __attribute__((always_inline)) Handle15693SampleFromReader(uin
                                        }
                                } else { // CODING_1_OUT_OF_4
                                        if (DecodeReader->posCount < 24) { // rising edge too early (nominally expected at 25)
-                                       DecodeReaderReset(DecodeReader);
+                                               DecodeReader->state = STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF;
                                        } else {
+                                               DecodeReader->posCount = 1;
                                                DecodeReader->state = STATE_READER_AWAIT_END_OF_SOF_1_OUT_OF_4;
                                        }
                                }
                        } else {
                                if (DecodeReader->Coding == CODING_1_OUT_OF_256) {
                                        if (DecodeReader->posCount > 34) { // signal stayed low for too long
-                                       DecodeReaderReset(DecodeReader);
+                                               DecodeReaderReset(DecodeReader);
                                        } else {
                                                // do nothing, keep waiting
                                        }
                                } else { // CODING_1_OUT_OF_4
                                        if (DecodeReader->posCount > 26) { // signal stayed low for too long
-                                       DecodeReaderReset(DecodeReader);
+                                               DecodeReaderReset(DecodeReader);
                                        } else {
                                                // do nothing, keep waiting
                                        }
@@ -772,7 +811,7 @@ static int inline __attribute__((always_inline)) Handle15693SampleFromReader(uin
                case STATE_READER_AWAIT_END_OF_SOF_1_OUT_OF_4:
                        DecodeReader->posCount++;
                        if (bit) {
-                               if (DecodeReader->posCount == 33) {
+                               if (DecodeReader->posCount == 9) {
                                        DecodeReader->posCount = 1;
                                        DecodeReader->bitCount = 0;
                                        DecodeReader->byteCount = 0;
@@ -881,19 +920,18 @@ static int inline __attribute__((always_inline)) Handle15693SampleFromReader(uin
 // Receive a command (from the reader to us, where we are the simulated tag),
 // and store it in the given buffer, up to the given maximum length. Keeps
 // spinning, waiting for a well-framed command, until either we get one
-// (returns true) or someone presses the pushbutton on the board (false).
+// (returns len) or someone presses the pushbutton on the board (returns -1).
 //
 // Assume that we're called with the SSC (to the FPGA) and ADC path set
 // correctly.
 //-----------------------------------------------------------------------------
 
-static int GetIso15693CommandFromReader(uint8_t *received, size_t max_len, uint32_t *eof_time)
-{
+int GetIso15693CommandFromReader(uint8_t *received, size_t max_len, uint32_t *eof_time) {
        int samples = 0;
        bool gotFrame = false;
        uint8_t b;
 
-       uint8_t *dmaBuf = BigBuf_malloc(ISO15693_DMA_BUFFER_SIZE);
+       uint8_t dmaBuf[ISO15693_DMA_BUFFER_SIZE];
 
        // the decoder data structure
        DecodeReader_t DecodeReader = {0};
@@ -910,21 +948,21 @@ static int GetIso15693CommandFromReader(uint8_t *received, size_t max_len, uint3
        (void) temp;
        while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)) ;
 
-       uint32_t bit_time = GetCountSspClk() & 0xfffffff8;
+       uint32_t dma_start_time = GetCountSspClk() & 0xfffffff8;
 
        // Setup and start DMA.
        FpgaSetupSscDma(dmaBuf, ISO15693_DMA_BUFFER_SIZE);
        uint8_t *upTo = dmaBuf;
 
-       for(;;) {
+       for (;;) {
                uint16_t behindBy = ((uint8_t*)AT91C_BASE_PDC_SSC->PDC_RPR - upTo) & (ISO15693_DMA_BUFFER_SIZE-1);
 
                if (behindBy == 0) continue;
 
                b = *upTo++;
-               if(upTo >= dmaBuf + ISO15693_DMA_BUFFER_SIZE) {                // we have read all of the DMA buffer content.
+               if (upTo >= dmaBuf + ISO15693_DMA_BUFFER_SIZE) {               // we have read all of the DMA buffer content.
                        upTo = dmaBuf;                                             // start reading the circular buffer from the beginning
-                       if(behindBy > (9*ISO15693_DMA_BUFFER_SIZE/10)) {
+                       if (behindBy > (9*ISO15693_DMA_BUFFER_SIZE/10)) {
                                Dbprintf("About to blow circular buffer - aborted! behindBy=%d", behindBy);
                                break;
                        }
@@ -936,7 +974,7 @@ static int GetIso15693CommandFromReader(uint8_t *received, size_t max_len, uint3
 
                for (int i = 7; i >= 0; i--) {
                        if (Handle15693SampleFromReader((b >> i) & 0x01, &DecodeReader)) {
-                               *eof_time = bit_time + samples - DELAY_READER_TO_ARM_SIM; // end of EOF
+                               *eof_time = dma_start_time + samples - DELAY_READER_TO_ARM_SIM; // end of EOF
                                gotFrame = true;
                                break;
                        }
@@ -948,22 +986,24 @@ static int GetIso15693CommandFromReader(uint8_t *received, size_t max_len, uint3
                }
 
                if (BUTTON_PRESS()) {
-                       DecodeReader.byteCount = 0;
+                       DecodeReader.byteCount = -1;
                        break;
                }
 
                WDT_HIT();
        }
 
-
        FpgaDisableSscDma();
-       BigBuf_free_keep_EM();
-       
+
        if (DEBUG) Dbprintf("samples = %d, gotFrame = %d, Decoder: state = %d, len = %d, bitCount = %d, posCount = %d",
-                           samples, gotFrame, DecodeReader.state, DecodeReader.byteCount, DecodeReader.bitCount, DecodeReader.posCount);
+                                               samples, gotFrame, DecodeReader.state, DecodeReader.byteCount, DecodeReader.bitCount, DecodeReader.posCount);
 
        if (DecodeReader.byteCount > 0) {
-               LogTrace(DecodeReader.output, DecodeReader.byteCount, 0, *eof_time, NULL, true);
+               uint32_t sof_time = *eof_time
+                                               - DecodeReader.byteCount * (DecodeReader.Coding==CODING_1_OUT_OF_4?128:2048) // time for byte transfers
+                                               - 32  // time for SOF transfer
+                                               - 16; // time for EOF transfer
+               LogTrace(DecodeReader.output, DecodeReader.byteCount, sof_time, *eof_time, NULL, true);
        }
 
        return DecodeReader.byteCount;
@@ -985,7 +1025,7 @@ static void BuildIdentifyRequest(void)
        // no mask
        cmd[2] = 0x00;
        //Now the CRC
-       crc = Crc(cmd, 3);
+       crc = Iso15693Crc(cmd, 3);
        cmd[3] = crc & 0xff;
        cmd[4] = crc >> 8;
 
@@ -1070,7 +1110,7 @@ void SnoopIso15693(void)
                Dbprintf("  DMA:           %i bytes", ISO15693_DMA_BUFFER_SIZE * sizeof(uint16_t));
        }
        Dbprintf("Snoop started. Press PM3 Button to stop.");
-       
+
        FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_MODE_SNOOP_AMPLITUDE);
        SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
 
@@ -1108,7 +1148,7 @@ void SnoopIso15693(void)
                        }
                }
                samples++;
-               
+
                if (!TagIsActive) {                                            // no need to try decoding reader data if the tag is sending
                        if (Handle15693SampleFromReader(snoopdata & 0x02, &DecodeReader)) {
                                FpgaDisableSscDma();
@@ -1137,7 +1177,7 @@ void SnoopIso15693(void)
                        ReaderIsActive = (DecodeReader.state >= STATE_READER_AWAIT_2ND_RISING_EDGE_OF_SOF);
                }
 
-               if (!ReaderIsActive && ExpectTagAnswer) {                                               // no need to try decoding tag data if the reader is currently sending or no answer expected yet
+               if (!ReaderIsActive && ExpectTagAnswer) {                       // no need to try decoding tag data if the reader is currently sending or no answer expected yet
                        if (Handle15693SamplesFromTag(snoopdata >> 2, &DecodeTag)) {
                                FpgaDisableSscDma();
                                //Use samples as a time measurement
@@ -1156,7 +1196,7 @@ void SnoopIso15693(void)
 
        FpgaDisableSscDma();
        BigBuf_free();
-       
+
        LEDsoff();
 
        DbpString("Snoop statistics:");
@@ -1203,7 +1243,7 @@ static void BuildReadBlockRequest(uint8_t *uid, uint8_t blockNumber )
        uint16_t crc;
        // If we set the Option_Flag in this request, the VICC will respond with the security status of the block
        // followed by the block data
-       cmd[0] = ISO15693_REQ_OPTION | ISO15693_REQ_ADDRESS | ISO15693_REQ_DATARATE_HIGH; 
+       cmd[0] = ISO15693_REQ_OPTION | ISO15693_REQ_ADDRESS | ISO15693_REQ_DATARATE_HIGH;
        // READ BLOCK command code
        cmd[1] = ISO15693_READBLOCK;
        // UID may be optionally specified here
@@ -1219,7 +1259,7 @@ static void BuildReadBlockRequest(uint8_t *uid, uint8_t blockNumber )
        // Block number to read
        cmd[10] = blockNumber;
        //Now the CRC
-       crc = Crc(cmd, 11); // the crc needs to be calculated over 11 bytes
+       crc = Iso15693Crc(cmd, 11); // the crc needs to be calculated over 11 bytes
        cmd[11] = crc & 0xff;
        cmd[12] = crc >> 8;
 
@@ -1246,7 +1286,7 @@ static void BuildInventoryResponse(uint8_t *uid)
        cmd[8] = uid[1]; //0x05;
        cmd[9] = uid[0]; //0xe0;
        //Now the CRC
-       crc = Crc(cmd, 10);
+       crc = Iso15693Crc(cmd, 10);
        cmd[10] = crc & 0xff;
        cmd[11] = crc >> 8;
 
@@ -1254,10 +1294,10 @@ static void BuildInventoryResponse(uint8_t *uid)
 }
 
 // Universal Method for sending to and recv bytes from a tag
-//     init ... should we initialize the reader?
-//     speed ... 0 low speed, 1 hi speed
-//     *recv will contain the tag's answer
-//     return: lenght of received data
+//  init ... should we initialize the reader?
+//  speed ... 0 low speed, 1 hi speed
+//  *recv will contain the tag's answer
+//  return: lenght of received data
 int SendDataTag(uint8_t *send, int sendlen, bool init, int speed, uint8_t *recv, uint16_t max_recv_len, uint32_t start_time) {
 
        LED_A_ON();
@@ -1341,7 +1381,7 @@ void DbdecodeIso15693Answer(int len, uint8_t *d) {
                        strncat(status,"NoErr ", DBD15STATLEN);
                }
 
-               crc=Crc(d,len-2);
+               crc=Iso15693Crc(d,len-2);
                if ( (( crc & 0xff ) == d[len-2]) && (( crc >> 8 ) == d[len-1]) )
                        strncat(status,"CrcOK",DBD15STATLEN);
                else
@@ -1374,7 +1414,7 @@ void ReaderIso15693(uint32_t parameter)
        LED_A_ON();
 
        set_tracing(true);
-       
+
        int answerLen = 0;
        uint8_t TagUID[8] = {0x00};
 
@@ -1387,8 +1427,8 @@ void ReaderIso15693(uint32_t parameter)
        FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER);
 
        // Start from off (no field generated)
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-       SpinDelay(200);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       SpinDelay(200);
 
        // Give the tags time to energize
        LED_D_ON();
@@ -1403,7 +1443,7 @@ void ReaderIso15693(uint32_t parameter)
        // Now send the IDENTIFY command
        BuildIdentifyRequest();
        TransmitTo15693Tag(ToSend, ToSendMax, 0);
-       
+
        // Now wait for a response
        answerLen = GetIso15693AnswerFromTag(answer, sizeof(answer), DELAY_ISO15693_VCD_TO_VICC_READER * 2) ;
        uint32_t start_time = GetCountSspClk() + DELAY_ISO15693_VICC_TO_VCD_READER;
@@ -1458,7 +1498,7 @@ void ReaderIso15693(uint32_t parameter)
 
        // for the time being, switch field off to protect rdv4.0
        // note: this prevents using hf 15 cmd with s option - which isn't implemented yet anyway
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        LED_D_OFF();
 
        LED_A_OFF();
@@ -1475,7 +1515,7 @@ void SimTagIso15693(uint32_t parameter, uint8_t *uid)
 
        FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
        SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_NO_MODULATION);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_NO_MODULATION);
        FpgaSetupSsc(FPGA_MAJOR_MODE_HF_SIMULATOR);
 
        StartCountSspClk();
@@ -1500,7 +1540,7 @@ void SimTagIso15693(uint32_t parameter, uint8_t *uid)
                Dbhexdump(cmd_len, cmd, false);
        }
 
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        LEDsoff();
 }
 
@@ -1514,24 +1554,24 @@ void BruteforceIso15693Afi(uint32_t speed)
 
        uint8_t data[6];
        uint8_t recv[ISO15693_MAX_RESPONSE_LENGTH];
-       
+
        int datalen=0, recvlen=0;
 
        Iso15693InitReader();
        StartCountSspClk();
-       
+
        // first without AFI
        // Tags should respond without AFI and with AFI=0 even when AFI is active
 
        data[0] = ISO15693_REQ_DATARATE_HIGH | ISO15693_REQ_INVENTORY | ISO15693_REQINV_SLOT1;
        data[1] = ISO15693_INVENTORY;
        data[2] = 0; // mask length
-       datalen = AddCrc(data,3);
+       datalen = Iso15693AddCrc(data,3);
        recvlen = SendDataTag(data, datalen, false, speed, recv, sizeof(recv), 0);
        uint32_t start_time = GetCountSspClk() + DELAY_ISO15693_VICC_TO_VCD_READER;
        WDT_HIT();
        if (recvlen>=12) {
-               Dbprintf("NoAFI UID=%s", sprintUID(NULL, &recv[2]));
+               Dbprintf("NoAFI UID=%s", Iso15693sprintUID(NULL, &recv[2]));
        }
 
        // now with AFI
@@ -1543,17 +1583,17 @@ void BruteforceIso15693Afi(uint32_t speed)
 
        for (int i = 0; i < 256; i++) {
                data[2] = i & 0xFF;
-               datalen = AddCrc(data,4);
+               datalen = Iso15693AddCrc(data,4);
                recvlen = SendDataTag(data, datalen, false, speed, recv, sizeof(recv), start_time);
                start_time = GetCountSspClk() + DELAY_ISO15693_VICC_TO_VCD_READER;
                WDT_HIT();
                if (recvlen >= 12) {
-                       Dbprintf("AFI=%i UID=%s", i, sprintUID(NULL, &recv[2]));
+                       Dbprintf("AFI=%i UID=%s", i, Iso15693sprintUID(NULL, &recv[2]));
                }
        }
        Dbprintf("AFI Bruteforcing done.");
 
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        LEDsoff();
 }
 
@@ -1585,7 +1625,7 @@ void DirectTag15693Command(uint32_t datalen, uint32_t speed, uint32_t recv, uint
 
        // for the time being, switch field off to protect rdv4.0
        // note: this prevents using hf 15 cmd with s option - which isn't implemented yet anyway
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        LED_D_OFF();
 
        LED_A_OFF();
@@ -1599,76 +1639,76 @@ void DirectTag15693Command(uint32_t datalen, uint32_t speed, uint32_t recv, uint
 // Set the UID to the tag (based on Iceman work).
 void SetTag15693Uid(uint8_t *uid)
 {
-    uint8_t cmd[4][9] = {0x00};
-
-    uint16_t crc;
-
-    int recvlen = 0;
-    uint8_t recvbuf[ISO15693_MAX_RESPONSE_LENGTH];
-
-    LED_A_ON();
-
-    // Command 1 : 02213E00000000
-    cmd[0][0] = 0x02;
-    cmd[0][1] = 0x21;
-    cmd[0][2] = 0x3e;
-    cmd[0][3] = 0x00;
-    cmd[0][4] = 0x00;
-    cmd[0][5] = 0x00;
-    cmd[0][6] = 0x00;
-
-    // Command 2 : 02213F69960000
-    cmd[1][0] = 0x02;
-    cmd[1][1] = 0x21;
-    cmd[1][2] = 0x3f;
-    cmd[1][3] = 0x69;
-    cmd[1][4] = 0x96;
-    cmd[1][5] = 0x00;
-    cmd[1][6] = 0x00;
-
-    // Command 3 : 022138u8u7u6u5 (where uX = uid byte X)
-    cmd[2][0] = 0x02;
-    cmd[2][1] = 0x21;
-    cmd[2][2] = 0x38;
-    cmd[2][3] = uid[7];
-    cmd[2][4] = uid[6];
-    cmd[2][5] = uid[5];
-    cmd[2][6] = uid[4];
-
-    // Command 4 : 022139u4u3u2u1 (where uX = uid byte X)
-    cmd[3][0] = 0x02;
-    cmd[3][1] = 0x21;
-    cmd[3][2] = 0x39;
-    cmd[3][3] = uid[3];
-    cmd[3][4] = uid[2];
-    cmd[3][5] = uid[1];
-    cmd[3][6] = uid[0];
-
-    for (int i=0; i<4; i++) {
-        // Add the CRC
-        crc = Crc(cmd[i], 7);
-        cmd[i][7] = crc & 0xff;
-        cmd[i][8] = crc >> 8;
-
-        if (DEBUG) {
-            Dbprintf("SEND:");
-            Dbhexdump(sizeof(cmd[i]), cmd[i], false);
-        }
-
-        recvlen = SendDataTag(cmd[i], sizeof(cmd[i]), true, 1, recvbuf, sizeof(recvbuf), 0);
-
-        if (DEBUG) {
-            Dbprintf("RECV:");
-            Dbhexdump(recvlen, recvbuf, false);
-            DbdecodeIso15693Answer(recvlen, recvbuf);
-        }
-
-        cmd_send(CMD_ACK, recvlen>ISO15693_MAX_RESPONSE_LENGTH?ISO15693_MAX_RESPONSE_LENGTH:recvlen, 0, 0, recvbuf, ISO15693_MAX_RESPONSE_LENGTH);
-    }
-    
-    LED_D_OFF();
-
-    LED_A_OFF();
+       uint8_t cmd[4][9] = {0x00};
+
+       uint16_t crc;
+
+       int recvlen = 0;
+       uint8_t recvbuf[ISO15693_MAX_RESPONSE_LENGTH];
+
+       LED_A_ON();
+
+       // Command 1 : 02213E00000000
+       cmd[0][0] = 0x02;
+       cmd[0][1] = 0x21;
+       cmd[0][2] = 0x3e;
+       cmd[0][3] = 0x00;
+       cmd[0][4] = 0x00;
+       cmd[0][5] = 0x00;
+       cmd[0][6] = 0x00;
+
+       // Command 2 : 02213F69960000
+       cmd[1][0] = 0x02;
+       cmd[1][1] = 0x21;
+       cmd[1][2] = 0x3f;
+       cmd[1][3] = 0x69;
+       cmd[1][4] = 0x96;
+       cmd[1][5] = 0x00;
+       cmd[1][6] = 0x00;
+
+       // Command 3 : 022138u8u7u6u5 (where uX = uid byte X)
+       cmd[2][0] = 0x02;
+       cmd[2][1] = 0x21;
+       cmd[2][2] = 0x38;
+       cmd[2][3] = uid[7];
+       cmd[2][4] = uid[6];
+       cmd[2][5] = uid[5];
+       cmd[2][6] = uid[4];
+
+       // Command 4 : 022139u4u3u2u1 (where uX = uid byte X)
+       cmd[3][0] = 0x02;
+       cmd[3][1] = 0x21;
+       cmd[3][2] = 0x39;
+       cmd[3][3] = uid[3];
+       cmd[3][4] = uid[2];
+       cmd[3][5] = uid[1];
+       cmd[3][6] = uid[0];
+
+       for (int i=0; i<4; i++) {
+               // Add the CRC
+               crc = Iso15693Crc(cmd[i], 7);
+               cmd[i][7] = crc & 0xff;
+               cmd[i][8] = crc >> 8;
+
+               if (DEBUG) {
+                       Dbprintf("SEND:");
+                       Dbhexdump(sizeof(cmd[i]), cmd[i], false);
+               }
+
+               recvlen = SendDataTag(cmd[i], sizeof(cmd[i]), true, 1, recvbuf, sizeof(recvbuf), 0);
+
+               if (DEBUG) {
+                       Dbprintf("RECV:");
+                       Dbhexdump(recvlen, recvbuf, false);
+                       DbdecodeIso15693Answer(recvlen, recvbuf);
+               }
+
+               cmd_send(CMD_ACK, recvlen>ISO15693_MAX_RESPONSE_LENGTH?ISO15693_MAX_RESPONSE_LENGTH:recvlen, 0, 0, recvbuf, ISO15693_MAX_RESPONSE_LENGTH);
+       }
+
+       LED_D_OFF();
+
+       LED_A_OFF();
 }
 
 
@@ -1702,7 +1742,7 @@ static void __attribute__((unused)) BuildSysInfoRequest(uint8_t *uid)
        cmd[8] = 0x05;
        cmd[9]= 0xe0; // always e0 (not exactly unique)
        //Now the CRC
-       crc = Crc(cmd, 10); // the crc needs to be calculated over 2 bytes
+       crc = Iso15693Crc(cmd, 10); // the crc needs to be calculated over 2 bytes
        cmd[10] = crc & 0xff;
        cmd[11] = crc >> 8;
 
@@ -1737,7 +1777,7 @@ static void __attribute__((unused)) BuildReadMultiBlockRequest(uint8_t *uid)
        // Number of Blocks to read
        cmd[11] = 0x2f; // read quite a few
        //Now the CRC
-       crc = Crc(cmd, 12); // the crc needs to be calculated over 2 bytes
+       crc = Iso15693Crc(cmd, 12); // the crc needs to be calculated over 2 bytes
        cmd[12] = crc & 0xff;
        cmd[13] = crc >> 8;
 
@@ -1770,9 +1810,9 @@ static void __attribute__((unused)) BuildArbitraryRequest(uint8_t *uid,uint8_t C
        cmd[10] = 0x00;
        cmd[11] = 0x0a;
 
-//     cmd[12] = 0x00;
-//     cmd[13] = 0x00; //Now the CRC
-       crc = Crc(cmd, 12); // the crc needs to be calculated over 2 bytes
+//  cmd[12] = 0x00;
+//  cmd[13] = 0x00; //Now the CRC
+       crc = Iso15693Crc(cmd, 12); // the crc needs to be calculated over 2 bytes
        cmd[12] = crc & 0xff;
        cmd[13] = crc >> 8;
 
@@ -1805,9 +1845,9 @@ static void __attribute__((unused)) BuildArbitraryCustomRequest(uint8_t uid[], u
        cmd[10] = 0x05; // for custom codes this must be manufacturer code
        cmd[11] = 0x00;
 
-//     cmd[12] = 0x00;
-//     cmd[13] = 0x00; //Now the CRC
-       crc = Crc(cmd, 12); // the crc needs to be calculated over 2 bytes
+//  cmd[12] = 0x00;
+//  cmd[13] = 0x00; //Now the CRC
+       crc = Iso15693Crc(cmd, 12); // the crc needs to be calculated over 2 bytes
        cmd[12] = crc & 0xff;
        cmd[13] = crc >> 8;
 
index 68df269339f51b479a937ad8ef2875fb98049027..7964d79ede187cc02b4cd62c5194de5996e5a611 100644 (file)
@@ -8,17 +8,31 @@
 // Routines to support ISO 15693.
 //-----------------------------------------------------------------------------
 
-#ifndef __ISO15693_H
-#define __ISO15693_H
+#ifndef ISO15693_H__
+#define ISO15693_H__
 
 #include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
 
+// Delays in SSP_CLK ticks.
+// SSP_CLK runs at 13,56MHz / 32 = 423.75kHz when simulating a tag
+#define DELAY_READER_TO_ARM_SIM           8
+#define DELAY_ARM_TO_READER_SIM           0
+#define DELAY_ISO15693_VCD_TO_VICC_SIM    132  // 132/423.75kHz = 311.5us from end of command EOF to start of tag response
+//SSP_CLK runs at 13.56MHz / 4 = 3,39MHz when acting as reader
+#define DELAY_ISO15693_VCD_TO_VICC_READER 1056 // 1056/3,39MHz = 311.5us from end of command EOF to start of tag response
+#define DELAY_ISO15693_VICC_TO_VCD_READER 1017 // 1017/3.39MHz = 300us between end of tag response and next reader command
+
+void CodeIso15693AsTag(uint8_t *cmd, size_t len);
+int GetIso15693CommandFromReader(uint8_t *received, size_t max_len, uint32_t *eof_time);
+void TransmitTo15693Reader(const uint8_t *cmd, size_t len, uint32_t start_time, bool slow);
 void SnoopIso15693(void);
 void AcquireRawAdcSamplesIso15693(void);
 void ReaderIso15693(uint32_t parameter);
 void SimTagIso15693(uint32_t parameter, uint8_t *uid);
 void BruteforceIso15693Afi(uint32_t speed);
-void DirectTag15693Command(uint32_t datalen,uint32_t speed, uint32_t recv, uint8_t data[]); 
+void DirectTag15693Command(uint32_t datalen, uint32_t speed, uint32_t recv, uint8_t data[]);
 void SetTag15693Uid(uint8_t *uid);
 void SetDebugIso15693(uint32_t flag);
 
index a2e3175461ac89b251a6068a90b2d0591c3d1d5d..48b62b176b94e07002d221d89f12f9217b4ff7cb 100644 (file)
@@ -100,7 +100,46 @@ int usage_hf_iclass_sim(void) {
        return 0;
 }
 
+// the original malicious IDs from Flavio D. Garcia, Gerhard de Koning Gans, Roel Verdult,
+// and Milosch Meriac. Dismantling iClass and iClass Elite.
 #define NUM_CSNS 15
+static uint8_t csns[8 * NUM_CSNS] = {
+       0x00, 0x0B, 0x0F, 0xFF, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x04, 0x0E, 0x08, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x09, 0x0D, 0x05, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x0A, 0x0C, 0x06, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x0F, 0x0B, 0x03, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x08, 0x0A, 0x0C, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x0D, 0x09, 0x09, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x0E, 0x08, 0x0A, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x03, 0x07, 0x17, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x3C, 0x06, 0xE0, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x01, 0x05, 0x1D, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x02, 0x04, 0x1E, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x07, 0x03, 0x1B, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x00, 0x02, 0x24, 0xF7, 0xFF, 0x12, 0xE0,
+       0x00, 0x05, 0x01, 0x21, 0xF7, 0xFF, 0x12, 0xE0 };
+
+
+// pre-defined 9 CSNs by iceman.
+// only one csn depend on several others.
+// six depends only on the first csn,  (0,1, 0x45)
+
+// #define NUM_CSNS 9
+// static uint8_t csns[8 * NUM_CSNS] = {
+    // 0x01, 0x0A, 0x0F, 0xFF, 0xF7, 0xFF, 0x12, 0xE0,
+    // 0x0C, 0x06, 0x0C, 0xFE, 0xF7, 0xFF, 0x12, 0xE0,
+    // 0x10, 0x97, 0x83, 0x7B, 0xF7, 0xFF, 0x12, 0xE0,
+    // 0x13, 0x97, 0x82, 0x7A, 0xF7, 0xFF, 0x12, 0xE0,
+    // 0x07, 0x0E, 0x0D, 0xF9, 0xF7, 0xFF, 0x12, 0xE0,
+    // 0x14, 0x96, 0x84, 0x76, 0xF7, 0xFF, 0x12, 0xE0,
+    // 0x17, 0x96, 0x85, 0x71, 0xF7, 0xFF, 0x12, 0xE0,
+    // 0xCE, 0xC5, 0x0F, 0x77, 0xF7, 0xFF, 0x12, 0xE0,
+    // 0xD2, 0x5A, 0x82, 0xF8, 0xF7, 0xFF, 0x12, 0xE0
+    // //0x04, 0x08, 0x9F, 0x78, 0x6E, 0xFF, 0x12, 0xE0
+// };
+
+
 int CmdHFiClassSim(const char *Cmd) {
        uint8_t simType = 0;
        uint8_t CSN[8] = {0, 0, 0, 0, 0, 0, 0, 0};
@@ -110,45 +149,20 @@ int CmdHFiClassSim(const char *Cmd) {
        }
        simType = param_get8ex(Cmd, 0, 0, 10);
 
-       if(simType == 0)
-       {
+       if (simType == ICLASS_SIM_MODE_CSN) {
                if (param_gethex(Cmd, 1, CSN, 16)) {
                        PrintAndLog("A CSN should consist of 16 HEX symbols");
                        return usage_hf_iclass_sim();
                }
-
                PrintAndLog("--simtype:%02x csn:%s", simType, sprint_hex(CSN, 8));
        }
-       if(simType > 3)
-       {
-               PrintAndLog("Undefined simptype %d", simType);
-               return usage_hf_iclass_sim();
-       }
 
-       uint8_t numberOfCSNs=0;
-       if(simType == 2)
-       {
-               UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType,NUM_CSNS}};
+       uint8_t numberOfCSNs = 0;
+       if (simType == ICLASS_SIM_MODE_READER_ATTACK) {
+               UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType, NUM_CSNS}};
                UsbCommand resp = {0};
 
-               uint8_t csns[8*NUM_CSNS] = {
-                       0x00, 0x0B, 0x0F, 0xFF, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x04, 0x0E, 0x08, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x09, 0x0D, 0x05, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x0A, 0x0C, 0x06, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x0F, 0x0B, 0x03, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x08, 0x0A, 0x0C, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x0D, 0x09, 0x09, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x0E, 0x08, 0x0A, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x03, 0x07, 0x17, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x3C, 0x06, 0xE0, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x01, 0x05, 0x1D, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x02, 0x04, 0x1E, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x07, 0x03, 0x1B, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x00, 0x02, 0x24, 0xF7, 0xFF, 0x12, 0xE0,
-                       0x00, 0x05, 0x01, 0x21, 0xF7, 0xFF, 0x12, 0xE0 };
-
-               memcpy(c.d.asBytes, csns, 8*NUM_CSNS);
+               memcpy(c.d.asBytes, csns, 8 * NUM_CSNS);
 
                SendCommand(&c);
                if (!WaitForResponseTimeout(CMD_ACK, &resp, -1)) {
@@ -157,9 +171,9 @@ int CmdHFiClassSim(const char *Cmd) {
                }
 
                uint8_t num_mac_responses  = resp.arg[1];
-               PrintAndLog("Mac responses: %d MACs obtained (should be %d)", num_mac_responses,NUM_CSNS);
+               PrintAndLog("Mac responses: %d MACs obtained (should be %d)", num_mac_responses, NUM_CSNS);
 
-               size_t datalen = NUM_CSNS*24;
+               size_t datalen = NUM_CSNS * 24;
                /*
                 * Now, time to dump to file. We'll use this format:
                 * <8-byte CSN><8-byte CC><4 byte NR><4 byte MAC>....
@@ -167,28 +181,29 @@ int CmdHFiClassSim(const char *Cmd) {
                 * 8 * 24 bytes.
                 *
                 * The returndata from the pm3 is on the following format
-                * <4 byte NR><4 byte MAC>
-                * CC are all zeroes, CSN is the same as was sent in
+                * <8 byte CC><4 byte NR><4 byte MAC>
+                * CSN is the same as was sent in
                 **/
                void* dump = malloc(datalen);
-               memset(dump,0,datalen);//<-- Need zeroes for the CC-field
-               uint8_t i = 0;
-               for(i = 0 ; i < NUM_CSNS ; i++)
-               {
-                       memcpy(dump+i*24, csns+i*8,8); //CSN
-                       //8 zero bytes here...
+               for(int i = 0; i < NUM_CSNS; i++) {
+                       memcpy(dump + i*24, csns+i*8, 8); //CSN
+            //copy CC from response
+            memcpy(dump + i*24 + 8, resp.d.asBytes + i*16, 8);
                        //Then comes NR_MAC (eight bytes from the response)
-                       memcpy(dump+i*24+16,resp.d.asBytes+i*8,8);
-
+                       memcpy(dump + i*24 + 16, resp.d.asBytes + i*16 + 8, 8);
                }
                /** Now, save to dumpfile **/
                saveFile("iclass_mac_attack", "bin", dump,datalen);
                free(dump);
-       }else
-       {
-               UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType,numberOfCSNs}};
+
+       } else if (simType == ICLASS_SIM_MODE_CSN || simType == ICLASS_SIM_MODE_CSN_DEFAULT) {
+               UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType, numberOfCSNs}};
                memcpy(c.d.asBytes, CSN, 8);
                SendCommand(&c);
+
+       } else {
+               PrintAndLog("Undefined simtype %d", simType);
+               return usage_hf_iclass_sim();
        }
 
        return 0;
@@ -1265,24 +1280,18 @@ int CmdHFiClass_loclass(const char *Cmd) {
                return 0;
        }
        char fileName[255] = {0};
-       if(opt == 'f')
-       {
-               if(param_getstr(Cmd, 1, fileName, sizeof(fileName)) > 0)
-               {
+       if(opt == 'f') {
+               if(param_getstr(Cmd, 1, fileName, sizeof(fileName)) > 0) {
                        return bruteforceFileNoKeys(fileName);
-               }else
-               {
+               } else {
                        PrintAndLog("You must specify a filename");
                }
-       }
-       else if(opt == 't')
-       {
+       } else if(opt == 't') {
                int errors = testCipherUtils();
                errors += testMAC();
                errors += doKeyTests(0);
                errors += testElite();
-               if(errors)
-               {
+               if(errors) {
                        prnlog("OBS! There were errors!!!");
                }
                return errors;
index 5384bfce49aa706ec82b45c33098daa7a07177ae..1b8e0955b4fd89c7b3102d5e80765d381ae8d458 100644 (file)
@@ -213,30 +213,29 @@ uint8_t iclass_CRC_check(bool isResponse, uint8_t* data, uint8_t len)
 }
 
 
-void annotateIclass(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize)
-{
+void annotateIclass(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize) {
        switch(cmd[0])
        {
-       case ICLASS_CMD_ACTALL:      snprintf(exp,size,"ACTALL"); break;
-       case ICLASS_CMD_READ_OR_IDENTIFY:{
-               if(cmdsize > 1){
+       case ICLASS_CMD_ACTALL:      snprintf(exp, size, "ACTALL"); break;
+       case ICLASS_CMD_READ_OR_IDENTIFY: {
+               if (cmdsize > 1){
                        snprintf(exp,size,"READ(%d)",cmd[1]);
-               }else{
+               } else {
                        snprintf(exp,size,"IDENTIFY");
                }
                break;
        }
-       case ICLASS_CMD_SELECT:      snprintf(exp,size,"SELECT"); break;
-       case ICLASS_CMD_PAGESEL:     snprintf(exp,size,"PAGESEL(%d)", cmd[1]); break;
-       case ICLASS_CMD_READCHECK_KC:snprintf(exp,size,"READCHECK[Kc](%d)", cmd[1]); break;
-       case ICLASS_CMD_READCHECK_KD:snprintf(exp,size,"READCHECK[Kd](%d)", cmd[1]); break;
-       case ICLASS_CMD_CHECK:       snprintf(exp,size,"CHECK"); break;
-       case ICLASS_CMD_DETECT:      snprintf(exp,size,"DETECT"); break;
-       case ICLASS_CMD_HALT:        snprintf(exp,size,"HALT"); break;
-       case ICLASS_CMD_UPDATE:      snprintf(exp,size,"UPDATE(%d)",cmd[1]); break;
-       case ICLASS_CMD_ACT:         snprintf(exp,size,"ACT"); break;
-       case ICLASS_CMD_READ4:       snprintf(exp,size,"READ4(%d)",cmd[1]); break;
-       default:                     snprintf(exp,size,"?"); break;
+       case ICLASS_CMD_SELECT:      snprintf(exp,size, "SELECT"); break;
+       case ICLASS_CMD_PAGESEL:     snprintf(exp,size, "PAGESEL(%d)", cmd[1]); break;
+       case ICLASS_CMD_READCHECK_KC:snprintf(exp,size, "READCHECK[Kc](%d)", cmd[1]); break;
+       case ICLASS_CMD_READCHECK_KD:snprintf(exp,size, "READCHECK[Kd](%d)", cmd[1]); break;
+       case ICLASS_CMD_CHECK:       snprintf(exp,size, "CHECK"); break;
+       case ICLASS_CMD_DETECT:      snprintf(exp,size, "DETECT"); break;
+       case ICLASS_CMD_HALT:        snprintf(exp,size, "HALT"); break;
+       case ICLASS_CMD_UPDATE:      snprintf(exp,size, "UPDATE(%d)",cmd[1]); break;
+       case ICLASS_CMD_ACT:         snprintf(exp,size, "ACT"); break;
+       case ICLASS_CMD_READ4:       snprintf(exp,size, "READ4(%d)",cmd[1]); break;
+       default:                     snprintf(exp,size, "?"); break;
        }
        return;
 }
@@ -901,6 +900,13 @@ uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, ui
                }
        }
 
+       // adjust for different time scales
+       if (protocol == ICLASS || protocol == ISO_15693) {
+               first_timestamp *= 32;
+               timestamp *= 32;
+               duration *= 32;
+       }
+       
        //Check the CRC status
        uint8_t crcStatus = 2;
 
@@ -940,6 +946,7 @@ uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, ui
                uint8_t parityBits = parityBytes[j>>3];
                if (protocol != ISO_14443B
                        && protocol != ISO_15693
+                       && protocol != ICLASS
                        && protocol != ISO_7816_4
                        && (isResponse || protocol == ISO_14443A)
                        && (oddparity8(frame[j]) != ((parityBits >> (7-(j&0x0007))) & 0x01))) {
@@ -950,8 +957,7 @@ uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, ui
        }
 
        if (markCRCBytes) {
-               if(crcStatus == 0 || crcStatus == 1)
-               {//CRC-command
+               if (crcStatus == 0 || crcStatus == 1) { //CRC-command
                        char *pos1 = line[(data_len-2)/16]+(((data_len-2) % 16) * 4);
                        (*pos1) = '[';
                        char *pos2 = line[(data_len)/16]+(((data_len) % 16) * 4);
@@ -978,8 +984,7 @@ uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, ui
        if (protocol == PROTO_MIFARE)
                annotateMifare(explanation, sizeof(explanation), frame, data_len, parityBytes, parity_len, isResponse);
 
-       if(!isResponse)
-       {
+       if (!isResponse) {
                switch(protocol) {
                        case ICLASS:      annotateIclass(explanation,sizeof(explanation),frame,data_len); break;
                        case ISO_14443A:  annotateIso14443a(explanation,sizeof(explanation),frame,data_len); break;
@@ -1027,6 +1032,11 @@ uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, ui
 
        if (showWaitCycles && !isResponse && next_record_is_response(tracepos, trace)) {
                uint32_t next_timestamp = *((uint32_t *)(trace + tracepos));
+               // adjust for different time scales
+               if (protocol == ICLASS || protocol == ISO_15693) {
+                       next_timestamp *= 32;
+               }
+
                PrintAndLog(" %10d | %10d | %s | fdt (Frame Delay Time): %d",
                        (EndOfTransmissionTimestamp - first_timestamp),
                        (next_timestamp - first_timestamp),
index 3b146b109b520fc05eec44c4d06aaffdfdee2205..03275a4f893cecd5a37d8e8603b7de7ef5d96442 100644 (file)
@@ -240,6 +240,7 @@ void doMAC(uint8_t *cc_nr_p, uint8_t *div_key_p, uint8_t mac[4])
        //free(cc_nr);
        return;
 }
+
 void doMAC_N(uint8_t *address_data_p, uint8_t address_data_size, uint8_t *div_key_p, uint8_t mac[4])
 {
        uint8_t *address_data;
index cfadcfbc3c9f66ea89377a0915fa0daf9899421f..8fda0fbd96db7d5c17ef982508f169aa2ad9d07a 100644 (file)
@@ -392,7 +392,7 @@ int bruteforceItem(dumpdata item, uint16_t keytable[]) {
                //Diversify
                diversifyKey(item.csn, key_sel_p, div_key);
                //Calc mac
-               doMAC(item.cc_nr, div_key,calculated_MAC);
+               doMAC(item.cc_nr, div_key, calculated_MAC);
 
                if (memcmp(calculated_MAC, item.mac, 4) == 0) {
                        for (int i = 0; i < numbytes_to_recover; i++)
@@ -401,8 +401,7 @@ int bruteforceItem(dumpdata item, uint16_t keytable[]) {
                        break;
                }
                brute++;
-               if((brute & 0xFFFF) == 0)
-               {
+               if ((brute & 0xFFFF) == 0) {
                        printf("%d",(brute >> 16) & 0xFF);
                        fflush(stdout);
                }
@@ -420,7 +419,6 @@ int bruteforceItem(dumpdata item, uint16_t keytable[]) {
                        keytable[bytes_to_recover[i]] &= ~BEING_CRACKED;
                        keytable[bytes_to_recover[i]] |= CRACKED;
                }
-
        }
 
        return errors;
@@ -508,7 +506,7 @@ int bruteforceDump(uint8_t dump[], size_t dumpsize, uint16_t keytable[])
 
        dumpdata* attack = (dumpdata* ) malloc(itemsize);
 
-       for(i = 0 ; i * itemsize < dumpsize ; i++ )
+       for (i = 0 ; i * itemsize < dumpsize ; i++ )
        {
                memcpy(attack,dump+i*itemsize, itemsize);
                errors += bruteforceItem(*attack, keytable);
index d9f59cc69893122880f7e45c7a090d653620e54c..ceb6393ecc079c797c7df77c63d70f1a3dae9653 100644 (file)
@@ -1,8 +1,8 @@
 // ISO15693 commons
 // Adrian Dabrowski 2010 and others, GPLv2
 
-#ifndef ISO15693_H__
-#define ISO15693_H__
+#ifndef ISO15693TOOLS_H__
+#define ISO15693TOOLS_H__
 
 // ISO15693 CRC
 #define ISO15693_CRC_PRESET  (uint16_t)0xFFFF
@@ -11,7 +11,7 @@
 
 uint16_t Iso15693Crc(uint8_t *v, int n);
 int Iso15693AddCrc(uint8_t *req, int n);
-char* Iso15693sprintUID(char *target,uint8_t *uid);
+char* Iso15693sprintUID(char *target, uint8_t *uid);
 unsigned short iclass_crc16(char *data_p, unsigned short length);
 
 #endif
index 665f7bcbe9df8553e37ddf040bf7406f7b59798e..1bd3c416fe728c26ee204ede9bc882c8f87486c8 100644 (file)
Binary files a/fpga/fpga_hf.bit and b/fpga/fpga_hf.bit differ
index de58a74ec73af60429a6055cb494cfcbf4824911..097b8a084a3e5daadca9d6e31d4f8ea64ee8527f 100644 (file)
@@ -33,60 +33,80 @@ module hi_simulate(
     output dbg;
     input [2:0] mod_type;
 
+assign adc_clk = ck_1356meg;
 
 // The comparator with hysteresis on the output from the peak detector.
 reg after_hysteresis;
-assign adc_clk = ck_1356meg;
+reg [11:0] has_been_low_for;
 
 always @(negedge adc_clk)
 begin
-    if(& adc_d[7:5]) after_hysteresis = 1'b1;           // if (adc_d >= 224)
-    else if(~(| adc_d[7:5])) after_hysteresis = 1'b0;   // if (adc_d <= 31)
+    if (& adc_d[7:5]) after_hysteresis <= 1'b1;           // if (adc_d >= 224)
+    else if (~(| adc_d[7:5])) after_hysteresis <= 1'b0;   // if (adc_d <= 31)
+
+       if (adc_d >= 224)
+    begin
+        has_been_low_for <= 12'd0;
+    end
+    else
+    begin
+        if (has_been_low_for == 12'd4095)
+        begin
+            has_been_low_for <= 12'd0;
+            after_hysteresis <= 1'b1;
+        end
+        else
+               begin
+            has_been_low_for <= has_been_low_for + 1;
+               end     
+    end
 end
 
 
 // Divide 13.56 MHz to produce various frequencies for SSP_CLK
 // and modulation.
-reg [7:0] ssp_clk_divider;
+reg [8:0] ssp_clk_divider;
 
-always @(posedge adc_clk)
+always @(negedge adc_clk)
     ssp_clk_divider <= (ssp_clk_divider + 1);
 
 reg ssp_clk;
 
 always @(negedge adc_clk)
 begin
-    if(mod_type == `FPGA_HF_SIMULATOR_MODULATE_424K_8BIT)
+    if (mod_type == `FPGA_HF_SIMULATOR_MODULATE_424K_8BIT)
       // Get bit every at 53KHz (every 8th carrier bit of 424kHz)
-      ssp_clk <= ssp_clk_divider[7];
-    else if(mod_type == `FPGA_HF_SIMULATOR_MODULATE_212K)
+      ssp_clk <= ~ssp_clk_divider[7];
+    else if (mod_type == `FPGA_HF_SIMULATOR_MODULATE_212K)
       // Get next bit at 212kHz
-      ssp_clk <= ssp_clk_divider[5];
+      ssp_clk <= ~ssp_clk_divider[5];
     else
       // Get next bit at 424Khz
-      ssp_clk <= ssp_clk_divider[4];
+      ssp_clk <= ~ssp_clk_divider[4];
 end
 
 
-// Divide SSP_CLK by 8 to produce the byte framing signal; the phase of
-// this is arbitrary, because it's just a bitstream.
-// One nasty issue, though: I can't make it work with both rx and tx at
-// once. The phase wrt ssp_clk must be changed. TODO to find out why
-// that is and make a better fix.
-reg [2:0] ssp_frame_divider_to_arm;
-always @(posedge ssp_clk)
-    ssp_frame_divider_to_arm <= (ssp_frame_divider_to_arm + 1);
-reg [2:0] ssp_frame_divider_from_arm;
-always @(negedge ssp_clk)
-    ssp_frame_divider_from_arm <= (ssp_frame_divider_from_arm + 1);
-
-
+// Produce the byte framing signal; the phase of this signal 
+// is arbitrary, because it's just a bit stream in this module.
 reg ssp_frame;
-always @(ssp_frame_divider_to_arm or ssp_frame_divider_from_arm or mod_type)
-    if(mod_type == `FPGA_HF_SIMULATOR_NO_MODULATION) // not modulating, so listening, to ARM
-        ssp_frame = (ssp_frame_divider_to_arm == 3'b000);
-    else
-        ssp_frame = (ssp_frame_divider_from_arm == 3'b000);
+always @(negedge adc_clk)
+begin
+       if (mod_type == `FPGA_HF_SIMULATOR_MODULATE_212K)
+       begin
+               if (ssp_clk_divider[8:5] == 4'd1)
+                       ssp_frame <= 1'b1;
+               if (ssp_clk_divider[8:5] == 4'd5)
+                       ssp_frame <= 1'b0;
+       end
+       else
+       begin
+               if (ssp_clk_divider[7:4] == 4'd1)
+                       ssp_frame <= 1'b1;
+               if (ssp_clk_divider[7:4] == 4'd5)
+                       ssp_frame <= 1'b0;
+       end
+end
+
 
 // Synchronize up the after-hysteresis signal, to produce DIN.
 reg ssp_din;
@@ -120,6 +140,6 @@ assign pwr_lo = 1'b0;
 assign pwr_oe2 = 1'b0;
 
 
-assign dbg = ssp_din;
+assign dbg = ssp_frame;
 
 endmodule
index 1bc5e5ba72ab151ed13d0bdc7f6ae0f571058258..934b0924030aacf8208e12fa05ed9e649fafe133 100644 (file)
@@ -228,7 +228,7 @@ typedef struct{
 #define CMD_UNKNOWN                                                       0xFFFF
 
 
-//Mifare simulation flags
+// Mifare simulation flags
 #define FLAG_INTERACTIVE                (1<<0)
 #define FLAG_4B_UID_IN_DATA             (1<<1)
 #define FLAG_7B_UID_IN_DATA             (1<<2)
@@ -236,7 +236,7 @@ typedef struct{
 #define FLAG_RANDOM_NONCE               (1<<5)
 
 
-//Iclass reader flags
+// iCLASS reader flags
 #define FLAG_ICLASS_READER_ONLY_ONCE    0x01
 #define FLAG_ICLASS_READER_CC           0x02
 #define FLAG_ICLASS_READER_CSN          0x04
@@ -245,8 +245,16 @@ typedef struct{
 #define FLAG_ICLASS_READER_ONE_TRY      0x20
 #define FLAG_ICLASS_READER_CEDITKEY     0x40
 
+// iCLASS simulation modes
+#define ICLASS_SIM_MODE_CSN                   0
+#define ICLASS_SIM_MODE_CSN_DEFAULT           1
+#define ICLASS_SIM_MODE_READER_ATTACK         2
+#define ICLASS_SIM_MODE_FULL                  3
+#define ICLASS_SIM_MODE_READER_ATTACK_KEYROLL 4
+#define ICLASS_SIM_MODE_EXIT_AFTER_MAC        5  // note: device internal only
 
-//hw tune args
+
+// hw tune args
 #define FLAG_TUNE_LF   1
 #define FLAG_TUNE_HF   2
 #define FLAG_TUNE_ALL  3
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