#include "proxmark3.h"
#include "apps.h"
#include "string.h"
+#include "util.h"
// BigBuf is the large multi-purpose buffer, typically used to hold A/D samples or traces.
// Also used to hold various smaller buffers and the Mifare Emulator Memory.
+/* BigBuf memory layout:
+Pointer to highest available memory: BigBuf_hi
+
+ high BIGBUF_SIZE
+ reserved = BigBuf_malloc() subtracts amount from BigBuf_hi,
+ low 0x00
+*/
+
// declare it as uint32_t to achieve alignment to 4 Byte boundary
static uint32_t BigBuf[BIGBUF_SIZE/sizeof(uint32_t)];
static uint8_t *emulator_memory = NULL;
// trace related variables
-static uint16_t traceLen = 0;
-int tracing = 1; //Last global one.. todo static?
+static uint32_t traceLen = 0;
+static bool tracing = true;
+
// get the address of BigBuf
uint8_t *BigBuf_get_addr(void)
// get the address of the emulator memory. Allocate part of Bigbuf for it, if not yet done
uint8_t *BigBuf_get_EM_addr(void)
{
- if (emulator_memory == NULL) { // not yet allocated
+ // not yet allocated
+ if (emulator_memory == NULL) {
emulator_memory = BigBuf_malloc(CARD_MEMORY_SIZE);
}
-
+
return emulator_memory;
}
// clear ALL of BigBuf
void BigBuf_Clear(void)
{
- memset(BigBuf,0,BIGBUF_SIZE);
- Dbprintf("Buffer cleared (%i bytes)",BIGBUF_SIZE);
+ BigBuf_Clear_ext(true);
+}
+
+
+// clear ALL of BigBuf
+void BigBuf_Clear_ext(bool verbose)
+{
+ memset(BigBuf, 0, BIGBUF_SIZE);
+ if (verbose)
+ Dbprintf("Buffer cleared (%i bytes)", BIGBUF_SIZE);
}
+void BigBuf_Clear_EM(void){
+ memset(BigBuf_get_EM_addr(), 0, CARD_MEMORY_SIZE);
+}
+
+
+void BigBuf_Clear_keep_EM(void)
+{
+ memset(BigBuf, 0, BigBuf_hi);
+}
+
// allocate a chunk of memory from BigBuf. We allocate high memory first. The unallocated memory
// at the beginning of BigBuf is always for traces/samples
uint8_t *BigBuf_malloc(uint16_t chunksize)
{
- if (BigBuf_hi - chunksize < 0) {
- return NULL; // no memory left
+ if (BigBuf_hi - chunksize < 0) {
+ return NULL; // no memory left
} else {
- chunksize = (chunksize + 3) & 0xfffc; // round to next multiple of 4
- BigBuf_hi -= chunksize; // aligned to 4 Byte boundary
+ chunksize = (chunksize + 3) & 0xfffc; // round to next multiple of 4
+ BigBuf_hi -= chunksize; // aligned to 4 Byte boundary
return (uint8_t *)BigBuf + BigBuf_hi;
}
}
}
}
+void BigBuf_print_status(void)
+{
+ Dbprintf("Memory");
+ Dbprintf(" BIGBUF_SIZE.............%d", BIGBUF_SIZE);
+ Dbprintf(" Available memory........%d", BigBuf_hi);
+ Dbprintf("Tracing");
+ Dbprintf(" tracing ................%d", tracing);
+ Dbprintf(" traceLen ...............%d", traceLen);
+}
+
// return the maximum trace length (i.e. the unallocated size of BigBuf)
uint16_t BigBuf_max_traceLen(void)
return BigBuf_hi;
}
+
void clear_trace() {
- uint8_t *trace = BigBuf_get_addr();
- uint16_t max_traceLen = BigBuf_max_traceLen();
- memset(trace, 0x44, max_traceLen);
traceLen = 0;
}
+
void set_tracing(bool enable) {
tracing = enable;
}
+
+bool get_tracing(void) {
+ return tracing;
+}
+
+
/**
* Get the number of bytes traced
* @return
return traceLen;
}
+
/**
This is a function to store traces. All protocols can use this generic tracer-function.
The traces produced by calling this function can be fetched on the client-side
**/
bool RAMFUNC LogTrace(const uint8_t *btBytes, uint16_t iLen, uint32_t timestamp_start, uint32_t timestamp_end, uint8_t *parity, bool readerToTag)
{
- if (!tracing) return FALSE;
+ if (!tracing) return false;
uint8_t *trace = BigBuf_get_addr();
- uint16_t num_paritybytes = (iLen-1)/8 + 1; // number of valid paritybytes in *parity
- uint16_t duration = timestamp_end - timestamp_start;
+ uint32_t num_paritybytes = (iLen-1)/8 + 1; // number of valid paritybytes in *parity
+ uint32_t duration = timestamp_end - timestamp_start;
// Return when trace is full
uint16_t max_traceLen = BigBuf_max_traceLen();
if (traceLen + sizeof(iLen) + sizeof(timestamp_start) + sizeof(duration) + num_paritybytes + iLen >= max_traceLen) {
- tracing = FALSE; // don't trace any more
- return FALSE;
+ tracing = false; // don't trace any more
+ return false;
}
// Traceformat:
// 32 bits timestamp (little endian)
// data bytes
if (btBytes != NULL && iLen != 0) {
- memcpy(trace + traceLen, btBytes, iLen);
+ for (int i = 0; i < iLen; i++) {
+ trace[traceLen++] = *btBytes++;
+ }
}
- traceLen += iLen;
// parity bytes
- if (parity != NULL && iLen != 0) {
- memcpy(trace + traceLen, parity, num_paritybytes);
+ if (num_paritybytes != 0) {
+ if (parity != NULL) {
+ for (int i = 0; i < num_paritybytes; i++) {
+ trace[traceLen++] = *parity++;
+ }
+ } else {
+ for (int i = 0; i < num_paritybytes; i++) {
+ trace[traceLen++] = 0x00;
+ }
+ }
}
- traceLen += num_paritybytes;
- if(traceLen +4 < max_traceLen)
- { //If it hadn't been cleared, for whatever reason..
- memset(trace+traceLen,0x44, 4);
+ return true;
+}
+
+
+int LogTraceHitag(const uint8_t * btBytes, int iBits, int iSamples, uint32_t dwParity, int readerToTag)
+{
+ /**
+ Todo, rewrite the logger to use the generic functionality instead. It should be noted, however,
+ that this logger takes number of bits as argument, not number of bytes.
+ **/
+
+ if (!tracing) return false;
+
+ uint8_t *trace = BigBuf_get_addr();
+ uint16_t iLen = nbytes(iBits);
+
+ // Return when trace is full
+ if (traceLen + sizeof(rsamples) + sizeof(dwParity) + sizeof(iBits) + iLen > BigBuf_max_traceLen()) {
+ return false;
+ }
+
+ //Hitag traces appear to use this traceformat:
+ // 32 bits timestamp (little endian,Highest Bit used as readerToTag flag)
+ // 32 bits parity
+ // 8 bits size (number of bits in the trace entry, not number of bytes)
+ // y Bytes data
+
+
+
+ rsamples += iSamples;
+ trace[traceLen++] = ((rsamples >> 0) & 0xff);
+ trace[traceLen++] = ((rsamples >> 8) & 0xff);
+ trace[traceLen++] = ((rsamples >> 16) & 0xff);
+ trace[traceLen++] = ((rsamples >> 24) & 0xff);
+
+ if (!readerToTag) {
+ trace[traceLen - 1] |= 0x80;
}
- return TRUE;
+ trace[traceLen++] = ((dwParity >> 0) & 0xff);
+ trace[traceLen++] = ((dwParity >> 8) & 0xff);
+ trace[traceLen++] = ((dwParity >> 16) & 0xff);
+ trace[traceLen++] = ((dwParity >> 24) & 0xff);
+ trace[traceLen++] = iBits;
+
+ for (int i = 0; i < iLen; i++) {
+ trace[traceLen++] = *btBytes++;
+ }
+
+ return true;
+}
+
+
+// Emulator memory
+uint8_t emlSet(uint8_t *data, uint32_t offset, uint32_t length){
+ uint8_t* mem = BigBuf_get_EM_addr();
+ if (offset+length < CARD_MEMORY_SIZE) {
+ memcpy(mem+offset, data, length);
+ return 0;
+ } else {
+ Dbprintf("Error, trying to set memory outside of bounds! %d > %d", (offset+length), CARD_MEMORY_SIZE);
+ return 1;
+ }
}
projects / proxmark3-svn / blobdiff