+//-----------------------------------------------------------------------------
+// Copyright (C) 2012 Roel Verdult
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// Low frequency Hitag support
+//-----------------------------------------------------------------------------
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "data.h"
+#include "proxusb.h"
+#include "ui.h"
+#include "cmdparser.h"
+#include "common.h"
+#include "util.h"
+#include "hitag2.h"
+
+static int CmdHelp(const char *Cmd);
+
+int CmdLFHitagList(const char *Cmd)
+{
+ uint8_t got[3000];
+ GetFromBigBuf(got,sizeof(got),0);
+
+ PrintAndLog("recorded activity:");
+ PrintAndLog(" ETU :rssi: who bytes");
+ PrintAndLog("---------+----+----+-----------");
+
+ int i = 0;
+ int prev = -1;
+
+ for (;;) {
+ if(i >= 1900) {
+ break;
+ }
+
+ bool isResponse;
+ int timestamp = *((uint32_t *)(got+i));
+ if (timestamp & 0x80000000) {
+ timestamp &= 0x7fffffff;
+ isResponse = 1;
+ } else {
+ isResponse = 0;
+ }
+
+ int metric = 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 len = got[i+8];
+
+ if (len > 100) {
+ break;
+ }
+ if (i + len >= 1900) {
+ 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]);
+ }
+ }
+
+ char metricString[100];
+ if (isResponse) {
+ sprintf(metricString, "%3d", metric);
+ } else {
+ strcpy(metricString, " ");
+ }
+
+ PrintAndLog(" +%7d: %s: %s %s",
+ (prev < 0 ? 0 : (timestamp - prev)),
+ metricString,
+ (isResponse ? "TAG" : " "),
+ line);
+
+ prev = timestamp;
+ i += (len + 9);
+ }
+ return 0;
+}
+
+int CmdLFHitagSnoop(const char *Cmd) {
+ UsbCommand c = {CMD_SNOOP_HITAG};
+ SendCommand(&c);
+ return 0;
+}
+
+int CmdLFHitagSim(const char *Cmd) {
+ UsbCommand c = {CMD_SIMULATE_HITAG};
+ char filename[256];
+ FILE* pf;
+ bool tag_mem_supplied;
+
+ param_getstr(Cmd,0,filename);
+
+ if (strlen(filename) > 0) {
+ if ((pf = fopen(filename,"rb+")) == NULL) {
+ PrintAndLog("Error: Could not open file [%s]",filename);
+ return 1;
+ }
+ tag_mem_supplied = true;
+ fread(c.d.asBytes,48,1,pf);
+ fclose(pf);
+ } else {
+ tag_mem_supplied = false;
+ }
+
+ // Does the tag comes with memory
+ c.arg[0] = (uint32_t)tag_mem_supplied;
+
+ SendCommand(&c);
+ return 0;
+}
+
+int CmdLFHitagReader(const char *Cmd) {
+// UsbCommand c = {CMD_READER_HITAG};
+
+// param_get32ex(Cmd,1,0,16);
+ UsbCommand c = {CMD_READER_HITAG};//, {param_get32ex(Cmd,0,0,10),param_get32ex(Cmd,1,0,16),param_get32ex(Cmd,2,0,16),param_get32ex(Cmd,3,0,16)}};
+ hitag_data* htd = (hitag_data*)c.d.asBytes;
+ hitag_function htf = param_get32ex(Cmd,0,0,10);
+
+ switch (htf) {
+ case RHT2F_PASSWORD: {
+ num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->pwd.password);
+ } break;
+ case RHT2F_AUTHENTICATE: {
+ num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->auth.NrAr);
+ num_to_bytes(param_get32ex(Cmd,2,0,16),4,htd->auth.NrAr+4);
+ } break;
+ case RHT2F_TEST_AUTH_ATTEMPTS: {
+ // No additional parameters needed
+ } break;
+ default: {
+ PrintAndLog("Error: unkown reader function %d",htf);
+ PrintAndLog("Hitag reader functions",htf);
+ PrintAndLog(" HitagS (0*)",htf);
+ PrintAndLog(" Hitag1 (1*)",htf);
+ PrintAndLog(" Hitag2 (2*)",htf);
+ PrintAndLog(" 21 <password> (password mode)",htf);
+ PrintAndLog(" 22 <nr> <ar> (authentication)",htf);
+ PrintAndLog(" 25 (test recorded authentications)",htf);
+ return 1;
+ } break;
+ }
+
+ // Copy the hitag2 function into the first argument
+ c.arg[0] = htf;
+
+ SendCommand(&c);
+ return 0;
+}
+
+static command_t CommandTableHitag[] =
+{
+ {"help", CmdHelp, 1, "This help"},
+ {"list", CmdLFHitagList, 1, "List Hitag trace history"},
+ {"reader", CmdLFHitagReader, 1, "Act like a Hitag Reader"},
+ {"sim", CmdLFHitagSim, 1, "Simulate Hitag transponder"},
+ {"snoop", CmdLFHitagSnoop, 1, "Eavesdrop Hitag communication"},
+ {NULL, NULL, 0, NULL}
+};
+
+int CmdLFHitag(const char *Cmd)
+{
+ CmdsParse(CommandTableHitag, Cmd);
+ return 0;
+}
+
+int CmdHelp(const char *Cmd)
+{
+ CmdsHelp(CommandTableHitag);
+ return 0;
+}
projects / proxmark3-svn / commitdiff