]> git.zerfleddert.de Git - proxmark3-svn/blobdiff - armsrc/iso14443b.c
textual changes
[proxmark3-svn] / armsrc / iso14443b.c
index 72c71964ff79813b1449daebf1a251ffba7a6b84..9616cb301266853ec58b2da2c7e13f4497d7082c 100644 (file)
@@ -8,17 +8,12 @@
 // Routines to support ISO 14443B. This includes both the reader software and
 // the `fake tag' modes.
 //-----------------------------------------------------------------------------
+#include "iso14443b.h"
 
-#include "proxmark3.h"
-#include "apps.h"
-#include "util.h"
-#include "string.h"
-#include "iso14443crc.h"
-#include "common.h"
 #define RECEIVE_SAMPLES_TIMEOUT 20000
 #define ISO14443B_DMA_BUFFER_SIZE 256
 
-// PCB Block number for APDUs
+// the block number for the ISO14443-4 PCB  (used with APDUs)
 static uint8_t pcb_blocknum = 0;
 
 //=============================================================================
@@ -100,7 +95,7 @@ static void DemodReset()
        Demod.bitCount = 0;
        Demod.thisBit = 0;
        Demod.shiftReg = 0;
-       memset(Demod.output, 0x00, MAX_FRAME_SIZE);
+       //memset(Demod.output, 0x00, MAX_FRAME_SIZE);
 }
 
 
@@ -111,6 +106,11 @@ static void DemodInit(uint8_t *data)
 }
 
 
+void AppendCrc14443b(uint8_t* data, int len)
+{
+       ComputeCrc14443(CRC_14443_B,data,len,data+len,data+len+1);
+}
+
 //-----------------------------------------------------------------------------
 // Code up a string of octets at layer 2 (including CRC, we don't generate
 // that here) so that they can be transmitted to the reader. Doesn't transmit
@@ -195,7 +195,7 @@ static void CodeIso14443bAsTag(const uint8_t *cmd, int len)
        }
 
        // Convert from last byte pos to length
-       ToSendMax++;
+       ++ToSendMax;
 }
 
 
@@ -372,13 +372,13 @@ static int GetIso14443bCommandFromReader(uint8_t *received, uint16_t *len)
 void SimulateIso14443bTag(void)
 {
        // the only commands we understand is WUPB, AFI=0, Select All, N=1:
-       static const uint8_t cmd1[] = { 0x05, 0x00, 0x08, 0x39, 0x73 }; // WUPB
+       static const uint8_t cmd1[] = { ISO14443B_REQB, 0x00, 0x08, 0x39, 0x73 }; // WUPB
        // ... and REQB, AFI=0, Normal Request, N=1:
-       static const uint8_t cmd2[] = { 0x05, 0x00, 0x00, 0x71, 0xFF }; // REQB
+       static const uint8_t cmd2[] = { ISO14443B_REQB, 0x00, 0x00, 0x71, 0xFF }; // REQB
        // ... and HLTB
-       static const uint8_t cmd3[] = { 0x50, 0xff, 0xff, 0xff, 0xff }; // HLTB
+       static const uint8_t cmd3[] = { ISO14443B_HALT, 0xff, 0xff, 0xff, 0xff }; // HLTB
        // ... and ATTRIB
-       static const uint8_t cmd4[] = { 0x1D, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; // ATTRIB
+       static const uint8_t cmd4[] = { ISO14443B_ATTRIB, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; // ATTRIB
 
        // ... and we always respond with ATQB, PUPI = 820de174, Application Data = 0x20381922,
        // supports only 106kBit/s in both directions, max frame size = 32Bytes,
@@ -389,8 +389,6 @@ void SimulateIso14443bTag(void)
        };
        // response to HLTB and ATTRIB
        static const uint8_t response2[] = {0x00, 0x78, 0xF0};
-
-       //uint8_t parity[MAX_PARITY_SIZE] = {0x00};
                                
        FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
 
@@ -435,7 +433,6 @@ void SimulateIso14443bTag(void)
                }
 
                if (tracing)
-                       //LogTrace(receivedCmd, len, 0, 0, parity, TRUE);
                        LogTrace(receivedCmd, len, 0, 0, NULL, TRUE);   
                        
 
@@ -454,6 +451,7 @@ void SimulateIso14443bTag(void)
                        respCodeLen = resp2CodeLen;
                } else {
                        Dbprintf("new cmd from reader: len=%d, cmdsRecvd=%d", len, cmdsRecvd);
+
                        // And print whether the CRC fails, just for good measure
                        uint8_t b1, b2;
                        if (len >= 3){ // if crc exists
@@ -475,9 +473,9 @@ void SimulateIso14443bTag(void)
                        //break;
                }
 
-               cmdsRecvd++;
+               ++cmdsRecvd;
 
-               if(cmdsRecvd > 0x30) {
+               if(cmdsRecvd > 0xFF) {
                        DbpString("many commands later...");
                        break;
                }
@@ -493,26 +491,25 @@ void SimulateIso14443bTag(void)
 
                // Transmit the response.
                uint16_t i = 0;
+               volatile uint8_t b;
                for(;;) {
                        if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
                                uint8_t b = respCode[i];
 
                                AT91C_BASE_SSC->SSC_THR = b;
 
-                               i++;
-                               if(i > respCodeLen) {
+                               ++i;
+                               if(i > respCodeLen)
                                        break;
-                               }
+
                        }
                        if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
-                               volatile uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
+                               b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
                                (void)b;
                        }
                }
                
-               // trace the response:
                if (tracing)
-                       //LogTrace(resp, respLen, 0, 0, parity, FALSE);
                        LogTrace(resp, respLen, 0, 0, NULL, FALSE);
        }
 }
@@ -604,6 +601,10 @@ static RAMFUNC int Handle14443bSamplesDemod(int ci, int cq)
                } \
        }
 
+//note: couldn't we just use MAX(ABS(ci),ABS(cq)) + (MIN(ABS(ci),ABS(cq))/2) from common.h - marshmellow
+#define CHECK_FOR_SUBCARRIER_duo() { \
+               v = MAX(ABS(ci),ABS(cq)) + (MIN(ABS(ci),ABS(cq))/2); \
+       }
 
        switch(Demod.state) {
                case DEMOD_UNSYNCD:
@@ -758,10 +759,11 @@ static void GetSamplesFor14443bDemod(int n, bool quiet)
 
        // Allocate memory from BigBuf for some buffers
        // free all previous allocations first
-       BigBuf_free();
+       ///BigBuf_free();
 
        // The response (tag -> reader) that we're receiving.
        // Set up the demodulator for tag -> reader responses.
+       // this init, can take some time to execute,  memset
        DemodInit(BigBuf_malloc(MAX_FRAME_SIZE));
        
        // The DMA buffer, used to stream samples from the FPGA
@@ -798,15 +800,15 @@ static void GetSamplesFor14443bDemod(int n, bool quiet)
 
                        samples += 2;
 
-                       //
-                       gotFrame = Handle14443bSamplesDemod(ci , cq );
+                       // is this | 0x01 the error?   & 0xfe  in https://github.com/Proxmark/proxmark3/issues/103
+                       // can we double this?
+                       gotFrame = Handle14443bSamplesDemod(ci<<2 , cq<<2);
                        if ( gotFrame )
                                break;
                }
 
-               if(samples > n || gotFrame) {
+               if(samples > n || gotFrame)
                        break;
-               }
        }
 
        //disable
@@ -824,9 +826,8 @@ static void GetSamplesFor14443bDemod(int n, bool quiet)
                );
        }
 
-       //Tracing
-       if (Demod.len > 0)
-               LogTrace(Demod.output, Demod.len, 0, 0, NULL, FALSE);
+        if (tracing > 0)
+               LogTrace(Demod.output, Demod.len, samples, samples, NULL, FALSE);
 }
 
 
@@ -890,14 +891,14 @@ static void CodeIso14443bAsReader(const uint8_t *cmd, int len)
        ToSendReset();
 
        // Establish initial reference level
-       for(i = 0; i < 40; i++)
+       for(i = 0; i < 40; ++i)
                ToSendStuffBit(1);
 
        // Send SOF
-       for(i = 0; i < 10; i++)
+       for(i = 0; i < 10; ++i)
                ToSendStuffBit(0);
 
-       for(i = 0; i < len; i++) {
+       for(i = 0; i < len; ++i) {
                // Stop bits/EGT
                ToSendStuffBit(1);
                ToSendStuffBit(1);
@@ -905,7 +906,7 @@ static void CodeIso14443bAsReader(const uint8_t *cmd, int len)
                ToSendStuffBit(0);
                // Data bits
                b = cmd[i];
-               for(j = 0; j < 8; j++) {
+               for(j = 0; j < 8; ++j) {
                        if(b & 1)
                                ToSendStuffBit(1);
                        else
@@ -916,16 +917,16 @@ static void CodeIso14443bAsReader(const uint8_t *cmd, int len)
        }
        // Send EOF
        ToSendStuffBit(1);
-       for(i = 0; i < 10; i++)
+       for(i = 0; i < 10; ++i)
                ToSendStuffBit(0);
        
-       for(i = 0; i < 8; i++)
+       for(i = 0; i < 8; ++i)
                ToSendStuffBit(1);
 
 
        // And then a little more, to make sure that the last character makes
        // it out before we switch to rx mode.
-       for(i = 0; i < 24; i++)
+       for(i = 0; i < 24; ++i)
                ToSendStuffBit(1);
 
        // Convert from last character reference to length
@@ -940,18 +941,18 @@ static void CodeAndTransmit14443bAsReader(const uint8_t *cmd, int len)
 {
        CodeIso14443bAsReader(cmd, len);
        TransmitFor14443b();
-       if (tracing) {
-               //uint8_t parity[MAX_PARITY_SIZE];
-               //LogTrace(cmd,len, 0, 0, parity, TRUE);
-               LogTrace(cmd,len, 0, 0, NULL, TRUE);
-       }
+
+       if(trigger) LED_A_ON();
+       
+       if (tracing) LogTrace(cmd, len, 0, 0, NULL, TRUE);
 }
 
 /* Sends an APDU to the tag
  * TODO: check CRC and preamble
  */
-int iso14443b_apdu(uint8_t const *message, size_t message_length, uint8_t *response)
+uint8_t iso14443b_apdu(uint8_t const *message, size_t message_length, uint8_t *response)
 {
+       uint8_t crc[2] = {0x00, 0x00};
        uint8_t message_frame[message_length + 4];
        // PCB
        message_frame[0] = 0x0A | pcb_blocknum;
@@ -969,7 +970,11 @@ int iso14443b_apdu(uint8_t const *message, size_t message_length, uint8_t *respo
        if(Demod.len < 3)
                return 0;
        
-       // TODO: Check CRC
+       // VALIDATE CRC
+    ComputeCrc14443(CRC_14443_B, Demod.output, Demod.len-2, &crc[0], &crc[1]);
+       if ( crc[0] != Demod.output[Demod.len-2] || crc[1] != Demod.output[Demod.len-1] )
+               return 0;
+       
        // copy response contents
        if(response != NULL)
                memcpy(response, Demod.output, Demod.len);
@@ -977,43 +982,120 @@ int iso14443b_apdu(uint8_t const *message, size_t message_length, uint8_t *respo
        return Demod.len;
 }
 
+/**
+* SRx Initialise.
+*/
+uint8_t iso14443b_select_srx_card(iso14b_card_select_t *card )
+{
+       // INITIATE command: wake up the tag using the INITIATE
+       static const uint8_t init_srx[] = { ISO14443B_INITIATE, 0x00, 0x97, 0x5b };
+       // SELECT command (with space for CRC)
+       uint8_t select_srx[] = { ISO14443B_SELECT, 0x00, 0x00, 0x00};
+       // temp to calc crc.
+       uint8_t crc[2] = {0x00, 0x00};
+       
+       CodeAndTransmit14443bAsReader(init_srx, sizeof(init_srx));
+       GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, TRUE);
+
+       if (Demod.len == 0) return 2;
+
+       // Randomly generated Chip ID   
+       if (card) card->chipid = Demod.output[0];
+       
+       select_srx[1] = Demod.output[0];
+       
+       ComputeCrc14443(CRC_14443_B, select_srx, 2, &select_srx[2], &select_srx[3]);
+       CodeAndTransmit14443bAsReader(select_srx, sizeof(select_srx));
+       GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, TRUE);
+       
+       if (Demod.len != 3)     return 2;
+       
+       // Check the CRC of the answer:
+       ComputeCrc14443(CRC_14443_B, Demod.output, Demod.len-2 , &crc[0], &crc[1]);
+       if(crc[0] != Demod.output[1] || crc[1] != Demod.output[2]) return 3;
+       
+       // Check response from the tag: should be the same UID as the command we just sent:
+       if (select_srx[1] != Demod.output[0]) return 1;
+
+       // First get the tag's UID:
+       select_srx[0] = ISO14443B_GET_UID;
+
+       ComputeCrc14443(CRC_14443_B, select_srx, 1 , &select_srx[1], &select_srx[2]);
+       CodeAndTransmit14443bAsReader(select_srx, 3); // Only first three bytes for this one
+       GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, TRUE);
+
+       if (Demod.len != 10) return 2;
+       
+       // The check the CRC of the answer
+       ComputeCrc14443(CRC_14443_B, Demod.output, Demod.len-2, &crc[0], &crc[1]);
+       if(crc[0] != Demod.output[8] || crc[1] != Demod.output[9]) return 3;
+
+       if (card) {
+               card->uidlen = 8;
+               memcpy(card->uid, Demod.output, 8);
+       }
+
+       return 0;
+}
 /* Perform the ISO 14443 B Card Selection procedure
  * Currently does NOT do any collision handling.
  * It expects 0-1 cards in the device's range.
  * TODO: Support multiple cards (perform anticollision)
  * TODO: Verify CRC checksums
  */
-int iso14443b_select_card()
+uint8_t iso14443b_select_card(iso14b_card_select_t *card )
 {
        // WUPB command (including CRC)
        // Note: WUPB wakes up all tags, REQB doesn't wake up tags in HALT state
-       static const uint8_t wupb[] = { 0x05, 0x00, 0x08, 0x39, 0x73 };
+       static const uint8_t wupb[] = { ISO14443B_REQB, 0x00, 0x08, 0x39, 0x73 };
        // ATTRIB command (with space for CRC)
-       uint8_t attrib[] = { 0x1D, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00};
+       uint8_t attrib[] = { ISO14443B_ATTRIB, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00};
 
+       // temp to calc crc.
+       uint8_t crc[2] = {0x00, 0x00};
+       
        // first, wake up the tag
        CodeAndTransmit14443bAsReader(wupb, sizeof(wupb));
        GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, TRUE);
+       
        // ATQB too short?
-       if (Demod.len < 14)
-               return 2;
+       if (Demod.len < 14) return 2;
+       
+       // VALIDATE CRC
+    ComputeCrc14443(CRC_14443_B, Demod.output, Demod.len-2, &crc[0], &crc[1]);
+       if ( crc[0] != Demod.output[12] || crc[1] != Demod.output[13] )
+               return 3;
+       
+       if (card) {
+               card->uidlen = 4;
+               memcpy(card->uid, Demod.output+1, 4);
+               memcpy(card->atqb, Demod.output+5, 7);
+       }
 
-    // select the tag
     // copy the PUPI to ATTRIB
     memcpy(attrib + 1, Demod.output + 1, 4);
-    /* copy the protocol info from ATQB (Protocol Info -> Protocol_Type) into
-    ATTRIB (Param 3) */
+       
+    // copy the protocol info from ATQB (Protocol Info -> Protocol_Type) into ATTRIB (Param 3)
     attrib[7] = Demod.output[10] & 0x0F;
     ComputeCrc14443(CRC_14443_B, attrib, 9, attrib + 9, attrib + 10);
+
     CodeAndTransmit14443bAsReader(attrib, sizeof(attrib));
     GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, TRUE);
+
     // Answer to ATTRIB too short?
-    if(Demod.len < 3)
-               return 2;
+    if(Demod.len < 3) return 2;
+
+       // VALIDATE CRC
+    ComputeCrc14443(CRC_14443_B, Demod.output, Demod.len-2, &crc[0], &crc[1]);
+       if ( crc[0] != Demod.output[1] || crc[1] != Demod.output[2] ) 
+               return 3;
+       
+       // CID
+       if (card) card->cid = Demod.output[0];
        
        // reset PCB block number
        pcb_blocknum = 0;
-       return 1;
+       return 0;
 }
 
 // Set up ISO 14443 Type B communication (similar to iso14443a_setup)
@@ -1034,7 +1116,7 @@ void iso14443b_setup() {
        // Signal field is on with the appropriate LED
     LED_D_ON();
        FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_TX | FPGA_HF_READER_TX_SHALLOW_MOD);
-       SpinDelay(200);
+       SpinDelay(400);
 
        // Start the timer
        StartCountSspClk();
@@ -1049,7 +1131,7 @@ void iso14443b_setup() {
 //
 // I tried to be systematic and check every answer of the tag, every CRC, etc...
 //-----------------------------------------------------------------------------
-void ReadSTMemoryIso14443b(uint32_t dwLast)
+void ReadSTMemoryIso14443b(uint8_t numofblocks)
 {
        FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
        clear_trace();
@@ -1070,10 +1152,10 @@ void ReadSTMemoryIso14443b(uint32_t dwLast)
        // Signal field is on with the appropriate LED
        LED_D_ON();
        FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR | FPGA_HF_READER_RX_XCORR_848_KHZ);
-       SpinDelay(200);
+       SpinDelay(300);
 
        // First command: wake up the tag using the INITIATE command
-       uint8_t cmd1[] = {0x06, 0x00, 0x97, 0x5b};
+       uint8_t cmd1[] = {ISO14443B_INITIATE, 0x00, 0x97, 0x5b};
        CodeAndTransmit14443bAsReader(cmd1, sizeof(cmd1));
        GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, TRUE);
 
@@ -1088,7 +1170,7 @@ void ReadSTMemoryIso14443b(uint32_t dwLast)
 
        // There is a response, SELECT the uid
        DbpString("Now SELECT tag:");
-       cmd1[0] = 0x0E; // 0x0E is SELECT
+       cmd1[0] = ISO14443B_SELECT; // 0x0E is SELECT
        cmd1[1] = Demod.output[0];
        ComputeCrc14443(CRC_14443_B, cmd1, 2, &cmd1[2], &cmd1[3]);
        CodeAndTransmit14443bAsReader(cmd1, sizeof(cmd1));
@@ -1114,7 +1196,7 @@ void ReadSTMemoryIso14443b(uint32_t dwLast)
 
        // Tag is now selected,
        // First get the tag's UID:
-       cmd1[0] = 0x0B;
+       cmd1[0] = ISO14443B_GET_UID;
        ComputeCrc14443(CRC_14443_B, cmd1, 1 , &cmd1[1], &cmd1[2]);
        CodeAndTransmit14443bAsReader(cmd1, 3); // Only first three bytes for this one
        GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, TRUE);
@@ -1135,12 +1217,13 @@ void ReadSTMemoryIso14443b(uint32_t dwLast)
                        (Demod.output[3]<<24) + (Demod.output[2]<<16) + (Demod.output[1]<<8) + Demod.output[0]);
 
        // Now loop to read all 16 blocks, address from 0 to last block
-       Dbprintf("Tag memory dump, block 0 to %d", dwLast);
+       Dbprintf("Tag memory dump, block 0 to %d", numofblocks);
        cmd1[0] = 0x08;
        i = 0x00;
-       dwLast++;
+       ++numofblocks;
+       
        for (;;) {
-                  if (i == dwLast) {
+               if (i == numofblocks) {
                        DbpString("System area block (0xff):");
                        i = 0xff;
                }
@@ -1148,9 +1231,10 @@ void ReadSTMemoryIso14443b(uint32_t dwLast)
                ComputeCrc14443(CRC_14443_B, cmd1, 2, &cmd1[2], &cmd1[3]);
                CodeAndTransmit14443bAsReader(cmd1, sizeof(cmd1));
                GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, TRUE);
+               
                if (Demod.len != 6) { // Check if we got an answer from the tag
-               DbpString("Expected 6 bytes from tag, got less...");
-               return;
+                       DbpString("Expected 6 bytes from tag, got less...");
+                       return;
                }
                // The check the CRC of the answer (use cmd1 as temporary variable):
                ComputeCrc14443(CRC_14443_B, Demod.output, 4, &cmd1[2], &cmd1[3]);
@@ -1163,16 +1247,14 @@ void ReadSTMemoryIso14443b(uint32_t dwLast)
                Dbprintf("Address=%02x, Contents=%08x, CRC=%04x", i,
                                (Demod.output[3]<<24) + (Demod.output[2]<<16) + (Demod.output[1]<<8) + Demod.output[0],
                                (Demod.output[4]<<8)+Demod.output[5]);
-               if (i == 0xff) {
-                       break;
-               }
-               i++;
+
+               if (i == 0xff) break;
+               ++i;
        }
        
        set_tracing(FALSE);
 }
 
-
 //=============================================================================
 // Finally, the `sniffer' combines elements from both the reader and
 // simulated tag, to show both sides of the conversation.
@@ -1236,7 +1318,6 @@ void RAMFUNC SnoopIso14443b(void)
        upTo = dmaBuf;
        lastRxCounter = ISO14443B_DMA_BUFFER_SIZE;
        FpgaSetupSscDma((uint8_t*) dmaBuf, ISO14443B_DMA_BUFFER_SIZE);
-       //uint8_t parity[MAX_PARITY_SIZE] = {0x00};
 
        bool TagIsActive = FALSE;
        bool ReaderIsActive = FALSE;
@@ -1245,10 +1326,8 @@ void RAMFUNC SnoopIso14443b(void)
        for(;;) {
                int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) &
                                                                (ISO14443B_DMA_BUFFER_SIZE-1);
-               if(behindBy > maxBehindBy) {
-                       maxBehindBy = behindBy;
-               }
 
+               if(behindBy > maxBehindBy) maxBehindBy = behindBy;
                if(behindBy < 2) continue;
 
                ci = upTo[0];
@@ -1281,27 +1360,27 @@ void RAMFUNC SnoopIso14443b(void)
 
                if (!TagIsActive) {                                                     // no need to try decoding reader data if the tag is sending
                        if (Handle14443bUartBit(ci & 0x01)) {
-                               if(triggered && tracing) {
-                                       //LogTrace(Uart.output, Uart.byteCnt, samples, samples, parity, TRUE);
+
+                               if(triggered && tracing)
                                        LogTrace(Uart.output, Uart.byteCnt, samples, samples, NULL, TRUE);
-                               }
+
                                /* And ready to receive another command. */
                                UartReset();
                                /* And also reset the demod code, which might have been */
                                /* false-triggered by the commands from the reader. */
                                DemodReset();
                        }
+                       
                        if (Handle14443bUartBit(cq & 0x01)) {
-                               if(triggered && tracing) {
-                                       //LogTrace(Uart.output, Uart.byteCnt, samples, samples, parity, TRUE);
+                               if(triggered && tracing)
                                        LogTrace(Uart.output, Uart.byteCnt, samples, samples, NULL, TRUE);
-                               }
+
                                        /* And ready to receive another command. */
                                        UartReset();
                                        /* And also reset the demod code, which might have been */
                                        /* false-triggered by the commands from the reader. */
                                        DemodReset();
-                               }
+                       }
                        ReaderIsActive = (Uart.state > STATE_GOT_FALLING_EDGE_OF_SOF);
                }
 
@@ -1311,7 +1390,6 @@ void RAMFUNC SnoopIso14443b(void)
 
                                //Use samples as a time measurement
                                if(tracing)
-                                   //LogTrace(Demod.output, Demod.len, samples, samples, parity, FALSE);
                                        LogTrace(Demod.output, Demod.len, samples, samples, NULL, FALSE);
 
                                triggered = TRUE;
@@ -1336,47 +1414,94 @@ void RAMFUNC SnoopIso14443b(void)
        set_tracing(FALSE);     
 }
 
+void iso14b_set_trigger(bool enable) {
+       trigger = enable;
+}
 
 /*
  * Send raw command to tag ISO14443B
  * @Input
- * datalen     len of buffer data
- * recv        bool when true wait for data from tag and send to client
- * powerfield  bool leave the field on when true
- * data        buffer with byte to send
+ * param   flags enum ISO14B_COMMAND.  (mifare.h)
+ * len     len of buffer data
+ * data    buffer with bytes to send
  *
  * @Output
  * none
  *
  */
-void SendRawCommand14443B(uint32_t datalen, uint32_t recv, uint8_t powerfield, uint8_t data[])
+void SendRawCommand14443B_Ex(UsbCommand *c)
 {
-       // param ISO_
-       // param ISO_CONNECT
-       // param ISO14A_NO_DISCONNECT
-       //if (param & ISO14A_NO_DISCONNECT)
-       // return;
-       iso14443b_setup();
+       iso14b_command_t param = c->arg[0];
+       size_t len = c->arg[1] & 0xffff;
+       uint8_t *cmd = c->d.asBytes;
+       uint8_t status = 0;
+       uint32_t sendlen = sizeof(iso14b_card_select_t);
+       uint8_t buf[USB_CMD_DATA_SIZE] = {0x00};
+
+       if (MF_DBGLEVEL > 3) Dbprintf("param, %04x", param );
        
-       if ( datalen == 0 && recv == 0 && powerfield == 0){
-               
-       } else {                
+       // turn on trigger (LED_A)
+       if (param & ISO14B_REQUEST_TRIGGER)
+               iso14b_set_trigger(TRUE);
+       
+       if (param & ISO14B_CONNECT) {
+               // Make sure that we start from off, since the tags are stateful;
+               // confusing things will happen if we don't reset them between reads.
+               LED_D_OFF();
+               FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+               SpinDelay(200);
                clear_trace();
-               set_tracing(TRUE);
-               CodeAndTransmit14443bAsReader(data, datalen);
+               iso14443b_setup();
        }
+       
+       set_tracing(TRUE);
 
-       if (recv) {
-               GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, FALSE);
-               uint16_t len = MIN(Demod.len, USB_CMD_DATA_SIZE);
-               cmd_send(CMD_ACK, len, 0, 0, Demod.output, len);
+       if ( param & ISO14B_SELECT_STD) {
+               iso14b_card_select_t *card = (iso14b_card_select_t*)buf;
+               status = iso14443b_select_card(card);   
+               cmd_send(CMD_ACK, status, sendlen, 0, buf, sendlen);
+               // 0: OK 2: attrib fail, 3:crc fail,
+               if ( status > 0 ) return;
+       } 
+       
+       if ( param & ISO14B_SELECT_SR) {
+               iso14b_card_select_t *card = (iso14b_card_select_t*)buf;
+               status = iso14443b_select_srx_card(card);
+               cmd_send(CMD_ACK, status, sendlen, 0, buf, sendlen);
+               // 0: OK 2: attrib fail, 3:crc fail,
+               if ( status > 0 ) return;
+       } 
+       
+       if (param & ISO14B_APDU) {
+               status = iso14443b_apdu(cmd, len, buf);
+               cmd_send(CMD_ACK, status, status, 0, buf, status);
        }
        
-       if (!powerfield) {
+       if (param & ISO14B_RAW) {
+               if(param & ISO14B_APPEND_CRC) {
+                       AppendCrc14443b(cmd, len);
+                       len += 2;
+               }
+       
+               CodeAndTransmit14443bAsReader(cmd, len);
+               GetSamplesFor14443bDemod(RECEIVE_SAMPLES_TIMEOUT, TRUE);
+               
+               sendlen = MIN(Demod.len, USB_CMD_DATA_SIZE);
+               status =  (Demod.len > 0) ? 0 : 1;
+               cmd_send(CMD_ACK, status, sendlen, 0, Demod.output, sendlen);
+       }
+       
+       // turn off trigger (LED_A)
+       if (param & ISO14B_REQUEST_TRIGGER)
+               iso14a_set_trigger(FALSE);
+
+       // turn off antenna et al
+       // we don't send a HALT command.
+       if ( param & ISO14B_DISCONNECT) {
+               if (MF_DBGLEVEL > 3) Dbprintf("disconnect");
                FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
                FpgaDisableSscDma();
                set_tracing(FALSE);
-               LED_D_OFF();
+               LEDsoff();
        }
-}
-
+}
\ No newline at end of file
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