int CmdLFHitagList(const char *Cmd)
{
- uint8_t got[TRACE_BUFFER_SIZE];
- GetFromBigBuf(got,sizeof(got),0);
- WaitForResponse(CMD_ACK,NULL);
-
- PrintAndLog("recorded activity:");
- PrintAndLog(" ETU :nbits: who bytes");
- PrintAndLog("---------+-----+----+-----------");
+ uint8_t *got = malloc(USB_CMD_DATA_SIZE);
+
+ // Query for the actual size of the trace
+ UsbCommand response;
+ GetFromBigBuf(got, USB_CMD_DATA_SIZE, 0);
+ WaitForResponse(CMD_ACK, &response);
+ uint16_t traceLen = response.arg[2];
+ if (traceLen > USB_CMD_DATA_SIZE) {
+ uint8_t *p = realloc(got, traceLen);
+ if (p == NULL) {
+ PrintAndLog("Cannot allocate memory for trace");
+ free(got);
+ return 2;
+ }
+ got = p;
+ GetFromBigBuf(got, traceLen, 0);
+ WaitForResponse(CMD_ACK,NULL);
+ }
+
+ PrintAndLog("recorded activity (TraceLen = %d bytes):");
+ PrintAndLog(" ETU :nbits: who bytes");
+ PrintAndLog("---------+-----+----+-----------");
- int i = 0;
- int prev = -1;
- int len = strlen(Cmd);
+ int i = 0;
+ int prev = -1;
+ int len = strlen(Cmd);
- char filename[FILE_PATH_SIZE] = { 0x00 };
- FILE* pf = NULL;
+ char filename[FILE_PATH_SIZE] = { 0x00 };
+ FILE* pf = NULL;
- if (len > FILE_PATH_SIZE)
- len = FILE_PATH_SIZE;
- memcpy(filename, Cmd, len);
+ if (len > FILE_PATH_SIZE)
+ len = FILE_PATH_SIZE;
+ memcpy(filename, Cmd, len);
- if (strlen(filename) > 0) {
- if ((pf = fopen(filename,"wb")) == NULL) {
- PrintAndLog("Error: Could not open file [%s]",filename);
- return 1;
+ if (strlen(filename) > 0) {
+ if ((pf = fopen(filename,"wb")) == NULL) {
+ PrintAndLog("Error: Could not open file [%s]",filename);
+ return 1;
+ }
}
- }
- for (;;) {
+ for (;;) {
- if(i >= TRACE_BUFFER_SIZE) { break; }
-
- bool isResponse;
- int timestamp = *((uint32_t *)(got+i));
- if (timestamp & 0x80000000) {
- timestamp &= 0x7fffffff;
- isResponse = 1;
- } else {
- isResponse = 0;
- }
-
- int parityBits = *((uint32_t *)(got+i+4));
- // 4 bytes of additional information...
- // maximum of 32 additional parity bit information
- //
- // TODO:
- // at each quarter bit period we can send power level (16 levels)
- // or each half bit period in 256 levels.
-
- int bits = got[i+8];
- int len = nbytes(got[i+8]);
-
- if (len > 100) {
- break;
- }
- if (i + len >= TRACE_BUFFER_SIZE) { break;}
-
- uint8_t *frame = (got+i+9);
-
- // Break and stick with current result if buffer was not completely full
- if (frame[0] == 0x44 && frame[1] == 0x44 && frame[3] == 0x44) { break; }
-
- char line[1000] = "";
- int j;
- for (j = 0; j < len; j++) {
- int oddparity = 0x01;
- int k;
+ if(i > traceLen) { break; }
+
+ bool isResponse;
+ int timestamp = *((uint32_t *)(got+i));
+ if (timestamp & 0x80000000) {
+ timestamp &= 0x7fffffff;
+ isResponse = 1;
+ } else {
+ isResponse = 0;
+ }
- for (k=0;k<8;k++) {
- oddparity ^= (((frame[j] & 0xFF) >> k) & 0x01);
- }
+ int parityBits = *((uint32_t *)(got+i+4));
+ // 4 bytes of additional information...
+ // maximum of 32 additional parity bit information
+ //
+ // TODO:
+ // at each quarter bit period we can send power level (16 levels)
+ // or each half bit period in 256 levels.
- //if((parityBits >> (len - j - 1)) & 0x01) {
- if (isResponse && (oddparity != ((parityBits >> (len - j - 1)) & 0x01))) {
- sprintf(line+(j*4), "%02x! ", frame[j]);
- }
- else {
- sprintf(line+(j*4), "%02x ", frame[j]);
- }
- }
-
- PrintAndLog(" +%7d: %3d: %s %s",
- (prev < 0 ? 0 : (timestamp - prev)),
- bits,
- (isResponse ? "TAG" : " "),
- line);
+ int bits = got[i+8];
+ int len = nbytes(got[i+8]);
+ if (len > 100) {
+ break;
+ }
+ if (i + len > traceLen) { break;}
+
+ uint8_t *frame = (got+i+9);
+
+ // Break and stick with current result if buffer was not completely full
+ if (frame[0] == 0x44 && frame[1] == 0x44 && frame[3] == 0x44) { break; }
+
+ char line[1000] = "";
+ int j;
+ for (j = 0; j < len; j++) {
+ int oddparity = 0x01;
+ int k;
+
+ for (k=0;k<8;k++) {
+ oddparity ^= (((frame[j] & 0xFF) >> k) & 0x01);
+ }
+
+ //if((parityBits >> (len - j - 1)) & 0x01) {
+ if (isResponse && (oddparity != ((parityBits >> (len - j - 1)) & 0x01))) {
+ sprintf(line+(j*4), "%02x! ", frame[j]);
+ }
+ else {
+ sprintf(line+(j*4), "%02x ", frame[j]);
+ }
+ }
- if (pf) {
- fprintf(pf," +%7d: %3d: %s %s\n",
- (prev < 0 ? 0 : (timestamp - prev)),
- bits,
- (isResponse ? "TAG" : " "),
- line);
- }
-
- prev = timestamp;
- i += (len + 9);
- }
+ PrintAndLog(" +%7d: %3d: %s %s",
+ (prev < 0 ? 0 : (timestamp - prev)),
+ bits,
+ (isResponse ? "TAG" : " "),
+ line);
+
+ if (pf) {
+ fprintf(pf," +%7d: %3d: %s %s\n",
+ (prev < 0 ? 0 : (timestamp - prev)),
+ bits,
+ (isResponse ? "TAG" : " "),
+ line);
+ }
+
+ prev = timestamp;
+ i += (len + 9);
+ }
- if (pf) {
- fclose(pf);
- PrintAndLog("Recorded activity succesfully written to file: %s", filename);
- }
+ if (pf) {
+ fclose(pf);
+ PrintAndLog("Recorded activity succesfully written to file: %s", filename);
+ }
- return 0;
+ free(got);
+ return 0;
}
int CmdLFHitagSnoop(const char *Cmd) {
projects / proxmark3-svn / blobdiff