add tracing functions (#784)

[proxmark3-svn] / client / pcsc.c

diff --git a/client/pcsc.c b/client/pcsc.c
index c54efacc1448568a3f928a31ec74eadaa72aaea5..ca87eb34e0731f19c5e2fdf8aceaa1683af95636 100644 (file)
--- a/client/pcsc.c
+++ b/client/pcsc.c
@@ -39,6 +39,92 @@ static SCARDHANDLE SC_Card;
 static DWORD SC_Protocol;
 static char* AlternativeSmartcardReader = NULL;
 
+#define PCSC_MAX_TRACELEN 60000
+static uint8_t pcsc_trace_buf[PCSC_MAX_TRACELEN];
+static bool tracing = false;
+static uint32_t traceLen = 0;
+
+
+uint8_t *pcsc_get_trace_addr(void)
+{
+       return pcsc_trace_buf;
+}
+
+
+uint32_t pcsc_get_traceLen(void)
+{
+       return traceLen;
+}
+
+
+static void pcsc_clear_trace(void)
+{
+       traceLen = 0;
+}
+
+
+static void pcsc_set_tracing(bool enable) {
+       tracing = enable;
+}
+
+
+static bool pcsc_LogTrace(const uint8_t *btBytes, uint16_t iLen, uint32_t timestamp_start, uint32_t timestamp_end, bool readerToTag)
+{
+       if (!tracing) return false;
+
+       uint8_t *trace = pcsc_trace_buf;
+
+       uint32_t num_paritybytes = (iLen-1)/8 + 1;      // number of paritybytes
+       uint32_t duration = timestamp_end - timestamp_start;
+
+       // Return when trace is full
+       if (traceLen + sizeof(iLen) + sizeof(timestamp_start) + sizeof(duration) + num_paritybytes + iLen >= PCSC_MAX_TRACELEN) {
+               tracing = false;        // don't trace any more
+               return false;
+       }
+       // Traceformat:
+       // 32 bits timestamp (little endian)
+       // 16 bits duration (little endian)
+       // 16 bits data length (little endian, Highest Bit used as readerToTag flag)
+       // y Bytes data
+       // x Bytes parity (one byte per 8 bytes data)
+
+       // timestamp (start)
+       trace[traceLen++] = ((timestamp_start >> 0) & 0xff);
+       trace[traceLen++] = ((timestamp_start >> 8) & 0xff);
+       trace[traceLen++] = ((timestamp_start >> 16) & 0xff);
+       trace[traceLen++] = ((timestamp_start >> 24) & 0xff);
+
+       // duration
+       trace[traceLen++] = ((duration >> 0) & 0xff);
+       trace[traceLen++] = ((duration >> 8) & 0xff);
+
+       // data length
+       trace[traceLen++] = ((iLen >> 0) & 0xff);
+       trace[traceLen++] = ((iLen >> 8) & 0xff);
+
+       // readerToTag flag
+       if (!readerToTag) {
+               trace[traceLen - 1] |= 0x80;
+       }
+
+       // data bytes
+       if (btBytes != NULL && iLen != 0) {
+               for (int i = 0; i < iLen; i++) {
+                       trace[traceLen++] = *btBytes++;
+               }
+       }
+
+       // dummy parity bytes
+       if (num_paritybytes != 0) {
+               for (int i = 0; i < num_paritybytes; i++) {
+                       trace[traceLen++] = 0x00;
+               }
+       }
+
+       return true;
+}
+
 
 char *getAlternativeSmartcardReader(void)
 {
@@ -194,6 +280,9 @@ bool pcscSelectAlternativeCardReader(const char *readername)
 
 bool pcscGetATR(smart_card_atr_t *card)
 {
+       pcsc_clear_trace();
+       pcsc_set_tracing(true);
+       
        if (!card) {
                return false;
        }
@@ -214,8 +303,10 @@ bool pcscGetATR(smart_card_atr_t *card)
        }
        card->atr_len = atr_len;
 
-       // TODO: LogTrace without device
-
+       pcsc_LogTrace(card->atr, card->atr_len, 0, 0, false);
+       
+       pcsc_set_tracing(false);
+       
        return true;
 }
 
@@ -229,11 +320,10 @@ void pcscTransmit(uint8_t *data, uint32_t data_len, uint32_t flags, uint8_t *res
                protocol = SCARD_PCI_RAW;
        }
 
-       // TODO: tracing
-       // if ((flags & SC_CONNECT))
-               // clear_trace();
+       if ((flags & SC_CONNECT))
+               pcsc_clear_trace();
 
-       // set_tracing(true);
+       pcsc_set_tracing(true);
 
        if ((flags & SC_CONNECT || flags & SC_SELECT)) {
                LONG res = SCardConnect(SC_Context, AlternativeSmartcardReader, SCARD_SHARE_SHARED,
@@ -245,14 +335,15 @@ void pcscTransmit(uint8_t *data, uint32_t data_len, uint32_t flags, uint8_t *res
        }
 
        if ((flags & SC_RAW) || (flags & SC_RAW_T0)) {
-               // TODO: tracing
-               // LogTrace(data, arg1, 0, 0, NULL, true);
+               pcsc_LogTrace(data, data_len, 0, 0, true);
                DWORD len = *response_len;
                LONG res = SCardTransmit(SC_Card, protocol, data, data_len, NULL, response, &len);
                if (res != SCARD_S_SUCCESS) {
                        *response_len = -1;
                } else {
+                       pcsc_LogTrace(response, len, 0, 0, false);
                        *response_len = len;
                }
        }
+       pcsc_set_tracing(false);
 }