-Fixed a bug in iso14_apdu

[proxmark3-svn] / armsrc / iso14443a.c

diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c
index a564a32ffcc345b9630f61cf77b4ee0ca6f355aa..530418e5e31be5c3bf33c09e7301a9f23463f536 100644 (file)
--- a/armsrc/iso14443a.c
+++ b/armsrc/iso14443a.c
@@ -26,6 +26,8 @@ int traceLen = 0;
 int rsamples = 0;
 int tracing = TRUE;
 uint8_t trigger = 0;
+// the block number for the ISO14443-4 PCB
+static uint8_t iso14_pcb_blocknum = 0;
 
 // CARD TO READER - manchester
 // Sequence D: 11110000 modulation with subcarrier during first half
@@ -72,6 +74,9 @@ void iso14a_clear_tracelen(void) {
 void iso14a_set_tracing(int enable) {
        tracing = enable;
 }
+void iso14a_set_timeout(uint32_t timeout) {
+       iso14a_timeout = timeout;
+}
 
 //-----------------------------------------------------------------------------
 // Generate the parity value for a byte sequence
@@ -1702,6 +1707,9 @@ int iso14443a_select_card(uint8_t * uid_ptr, iso14a_card_select_t * resp_data, u
                resp_data->ats_len = len;
        }
        
+       // reset the PCB block number
+       iso14_pcb_blocknum = 0;
+       
        return 1;
 }
 
@@ -1728,19 +1736,30 @@ void iso14443a_setup() {
 int iso14_apdu(uint8_t * cmd, size_t cmd_len, void * data) {
        uint8_t real_cmd[cmd_len+4];
        real_cmd[0] = 0x0a; //I-Block
+       // put block number into the PCB
+       real_cmd[0] |= iso14_pcb_blocknum;
        real_cmd[1] = 0x00; //CID: 0 //FIXME: allow multiple selected cards
        memcpy(real_cmd+2, cmd, cmd_len);
        AppendCrc14443a(real_cmd,cmd_len+2);
  
        ReaderTransmit(real_cmd, cmd_len+4);
        size_t len = ReaderReceive(data);
-       if(!len)
-               return -1; //DATA LINK ERROR
-       
+       uint8_t * data_bytes = (uint8_t *) data;
+       if (!len)
+               return 0; //DATA LINK ERROR
+       // if we received an I- or R(ACK)-Block with a block number equal to the
+       // current block number, toggle the current block number
+       else if (len >= 4 // PCB+CID+CRC = 4 bytes
+                && ((data_bytes[0] & 0xC0) == 0 // I-Block
+                    || (data_bytes[0] & 0xD0) == 0x80) // R-Block with ACK bit set to 0
+                && (data_bytes[0] & 0x01) == iso14_pcb_blocknum) // equal block numbers
+       {
+               iso14_pcb_blocknum ^= 1;
+       }
+
        return len;
 }
 
-
 //-----------------------------------------------------------------------------
 // Read an ISO 14443a tag. Send out commands and store answers.
 //
@@ -1790,6 +1809,7 @@ void ReaderIso14443a(UsbCommand * c, UsbCommand * ack)
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        LEDsoff();
 }
+
 //-----------------------------------------------------------------------------
 // Read an ISO 14443a tag. Send out commands and store answers.
 //
@@ -2416,7 +2436,7 @@ void RAMFUNC SniffMifare(uint8_t param) {
                
                if (++sniffCounter > 65) {
                        if (MfSniffSend(2000)) {
-                               AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTEN;
+                               FpgaEnableSscDma();
                        }
                        sniffCounter = 0;
                }
@@ -2442,7 +2462,7 @@ void RAMFUNC SniffMifare(uint8_t param) {
                if (!AT91C_BASE_PDC_SSC->PDC_RCR) {
                        AT91C_BASE_PDC_SSC->PDC_RPR = (uint32_t) dmaBuf;
                        AT91C_BASE_PDC_SSC->PDC_RCR = DMA_BUFFER_SIZE;
-                       Dbprintf("RxEmpty ERROR!!! %d", dataLen); // temporary
+                       Dbprintf("RxEmpty ERROR!!! data length:%d", dataLen); // temporary
                }
                // secondary buffer sets as primary, secondary buffer was stopped
                if (!AT91C_BASE_PDC_SSC->PDC_RNCR) {
@@ -2455,7 +2475,7 @@ void RAMFUNC SniffMifare(uint8_t param) {
                if(MillerDecoding((data[0] & 0xF0) >> 4)) {
                        LED_C_INV();
                        // check - if there is a short 7bit request from reader
-                       if (MfSniffLogic(receivedCmd, Uart.byteCnt, Uart.bitCnt, TRUE)) break;
+                       if (MfSniffLogic(receivedCmd, Uart.byteCnt, Uart.parityBits, Uart.bitCnt, TRUE)) break;
 
                        /* And ready to receive another command. */
                        Uart.state = STATE_UNSYNCD;
@@ -2467,7 +2487,7 @@ void RAMFUNC SniffMifare(uint8_t param) {
                if(ManchesterDecoding(data[0] & 0x0F)) {
                        LED_C_INV();
 
-                       if (MfSniffLogic(receivedResponse, Demod.len, Uart.bitCnt, FALSE)) break;
+                       if (MfSniffLogic(receivedResponse, Demod.len, Demod.parityBits, Demod.bitCount, FALSE)) break;
 
                        // And ready to receive another response.
                        memset(&Demod, 0, sizeof(Demod));
@@ -2487,10 +2507,9 @@ void RAMFUNC SniffMifare(uint8_t param) {
        DbpString("COMMAND FINISHED");
 
 done:
-       AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS;
+       FpgaDisableSscDma();
        MfSniffEnd();
        
-       Dbprintf("maxDataLen=%x, Uart.state=%x, Uart.byteCnt=%x", maxDataLen, Uart.state, Uart.byteCnt);
-       Dbprintf("Uart.byteCntMax=%x, traceLen=%x", Uart.byteCntMax, traceLen);
+       Dbprintf("maxDataLen=%x, Uart.state=%x, Uart.byteCnt=%x Uart.byteCntMax=%x", maxDataLen, Uart.state, Uart.byteCnt, Uart.byteCntMax);
        LEDsoff();
 }
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