git.zerfleddert.de Git - proxmark3-svn/blob - client/cmdlfhitag.c

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) 2012 Roel Verdult
   3 //
   4 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   5 // at your option, any later version. See the LICENSE.txt file for the text of
   6 // the license.
   7 //-----------------------------------------------------------------------------
   8 // Low frequency Hitag support
   9 //-----------------------------------------------------------------------------
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include "data.h"
  15 #include "proxmark3.h"
  16 #include "ui.h"
  17 #include "cmdparser.h"
  18 #include "common.h"
  19 #include "util.h"
  20 #include "hitag2.h"
  21 #include "hitagS.h"
  22 #include "sleep.h"
  23 #include "cmdmain.h"
  24
  25 static int CmdHelp(const char *Cmd);
  26
  27 size_t nbytes(size_t nbits) {
  28         return (nbits/8)+((nbits%8)>0);
  29 }
  30
  31 int CmdLFHitagList(const char *Cmd) {
  32         uint8_t *got = malloc(USB_CMD_DATA_SIZE);
  33
  34         // Query for the actual size of the trace
  35         UsbCommand response;
  36         GetFromBigBuf(got, USB_CMD_DATA_SIZE, 0);
  37         WaitForResponse(CMD_ACK, &response);
  38         uint16_t traceLen = response.arg[2];
  39         if (traceLen > USB_CMD_DATA_SIZE) {
  40                 uint8_t *p = realloc(got, traceLen);
  41                 if (p == NULL) {
  42                         PrintAndLog("Cannot allocate memory for trace");
  43                         free(got);
  44                         return 2;
  45                 }
  46                 got = p;
  47                 GetFromBigBuf(got, traceLen, 0);
  48                 WaitForResponse(CMD_ACK,NULL);
  49         }
  50
  51         PrintAndLog("recorded activity (TraceLen = %d bytes):");
  52         PrintAndLog(" ETU     :nbits: who bytes");
  53         PrintAndLog("---------+-----+----+-----------");
  54
  55         int i = 0;
  56         int prev = -1;
  57         int len = strlen(Cmd);
  58
  59         char filename[FILE_PATH_SIZE]  = { 0x00 };
  60         FILE* f = NULL;
  61
  62         if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
  63         memcpy(filename, Cmd, len);
  64
  65         if (strlen(filename) > 0) {
  66                 f = fopen(filename,"wb");
  67                 if (!f) {
  68                         PrintAndLog("Error: Could not open file [%s]",filename);
  69                         return 1;
  70                 }
  71         }
  72
  73         for (;;) {
  74
  75                 if(i >= traceLen) { break; }
  76
  77                 bool isResponse;
  78                 int timestamp = *((uint32_t *)(got+i));
  79                 if (timestamp & 0x80000000) {
  80                         timestamp &= 0x7fffffff;
  81                         isResponse = 1;
  82                 } else {
  83                         isResponse = 0;
  84                 }
  85
  86                 int parityBits = *((uint32_t *)(got+i+4));
  87                 // 4 bytes of additional information...
  88                 // maximum of 32 additional parity bit information
  89                 //
  90                 // TODO:
  91                 // at each quarter bit period we can send power level (16 levels)
  92                 // or each half bit period in 256 levels.
  93
  94                 int bits = got[i+8];
  95                 int len = nbytes(got[i+8]);
  96
  97                 if (len > 100) {
  98                   break;
  99                 }
 100                 if (i + len > traceLen) { break;}
 101
 102                 uint8_t *frame = (got+i+9);
 103
 104                 // Break and stick with current result if buffer was not completely full
 105                 if (frame[0] == 0x44 && frame[1] == 0x44 && frame[3] == 0x44) { break; }
 106
 107                 char line[1000] = "";
 108                 int j;
 109                 for (j = 0; j < len; j++) {
 110                   int oddparity = 0x01;
 111                   int k;
 112
 113                   for (k=0;k<8;k++) {
 114                         oddparity ^= (((frame[j] & 0xFF) >> k) & 0x01);
 115                   }
 116
 117                   //if((parityBits >> (len - j - 1)) & 0x01) {
 118                   if (isResponse && (oddparity != ((parityBits >> (len - j - 1)) & 0x01))) {
 119                         sprintf(line+(j*4), "%02x!  ", frame[j]);
 120                   }
 121                   else {
 122                         sprintf(line+(j*4), "%02x   ", frame[j]);
 123                   }
 124                 }
 125
 126                 PrintAndLog(" +%7d:  %3d: %s %s",
 127                         (prev < 0 ? 0 : (timestamp - prev)),
 128                         bits,
 129                         (isResponse ? "TAG" : "   "),
 130                         line);
 131
 132                 if (f) {
 133                         fprintf(f," +%7d:  %3d: %s %s\n",
 134                                 (prev < 0 ? 0 : (timestamp - prev)),
 135                                 bits,
 136                                 (isResponse ? "TAG" : "   "),
 137                                 line);
 138                 }
 139
 140                 prev = timestamp;
 141                 i += (len + 9);
 142         }
 143
 144         if (f) {
 145                 fclose(f);
 146                 PrintAndLog("Recorded activity succesfully written to file: %s", filename);
 147         }
 148
 149         free(got);
 150         return 0;
 151 }
 152
 153 int CmdLFHitagSnoop(const char *Cmd) {
 154         UsbCommand c = {CMD_SNOOP_HITAG};
 155         clearCommandBuffer();
 156         SendCommand(&c);
 157         return 0;
 158 }
 159
 160 int CmdLFHitagSim(const char *Cmd) {
 161
 162         UsbCommand c = {CMD_SIMULATE_HITAG};
 163         char filename[FILE_PATH_SIZE] = { 0x00 };
 164         FILE* f;
 165         bool tag_mem_supplied;
 166
 167         int len = strlen(Cmd);
 168         if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
 169         memcpy(filename, Cmd, len);
 170
 171         if (strlen(filename) > 0) {
 172                 f = fopen(filename,"rb+");
 173                 if (!f) {
 174                         PrintAndLog("Error: Could not open file [%s]",filename);
 175                         return 1;
 176                 }
 177                 tag_mem_supplied = true;
 178                 size_t bytes_read = fread(c.d.asBytes, 48, 1, f);
 179                 if ( bytes_read == 0) {
 180                         PrintAndLog("Error: File reading error");
 181                         fclose(f);
 182                         return 1;
 183                 }
 184                 fclose(f);
 185         } else {
 186                 tag_mem_supplied = false;
 187         }
 188
 189         // Does the tag comes with memory
 190         c.arg[0] = (uint32_t)tag_mem_supplied;
 191         clearCommandBuffer();
 192         SendCommand(&c);
 193         return 0;
 194 }
 195
 196 int CmdLFHitagReader(const char *Cmd) {
 197
 198         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)}};
 199         hitag_data* htd = (hitag_data*)c.d.asBytes;
 200         hitag_function htf = param_get32ex(Cmd,0,0,10);
 201
 202         switch (htf) {
 203                 case 01: { //RHTSF_CHALLENGE
 204                         c = (UsbCommand){ CMD_READ_HITAG_S };
 205                         num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->auth.NrAr);
 206                         num_to_bytes(param_get32ex(Cmd,2,0,16),4,htd->auth.NrAr+4);
 207                 } break;
 208                 case 02: { //RHTSF_KEY
 209                         c = (UsbCommand){ CMD_READ_HITAG_S };
 210                         num_to_bytes(param_get64ex(Cmd,1,0,16),6,htd->crypto.key);
 211                 } break;
 212                 case RHT2F_PASSWORD: {
 213                         num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->pwd.password);
 214                 } break;
 215                 case RHT2F_AUTHENTICATE: {
 216                         num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->auth.NrAr);
 217                         num_to_bytes(param_get32ex(Cmd,2,0,16),4,htd->auth.NrAr+4);
 218                 } break;
 219                 case RHT2F_CRYPTO: {
 220                         num_to_bytes(param_get64ex(Cmd,1,0,16),6,htd->crypto.key);
 221                 } break;
 222                 case RHT2F_TEST_AUTH_ATTEMPTS: {
 223                         // No additional parameters needed
 224                 } break;
 225                 case RHT2F_UID_ONLY: {
 226                         // No additional parameters needed
 227                 } break;
 228                 default: {
 229                         PrintAndLog("\nError: unkown reader function %d",htf);
 230                         PrintAndLog("");
 231                         PrintAndLog("Usage: hitag reader <Reader Function #>");
 232                         PrintAndLog("Reader Functions:");
 233                         PrintAndLog(" HitagS (0*)");
 234                         PrintAndLog("  01 <nr> <ar> (Challenge) read all pages from a Hitag S tag");
 235                         PrintAndLog("  02 <key> (set to 0 if no authentication is needed) read all pages from a Hitag S tag");
 236                         PrintAndLog(" Hitag1 (1*)");
 237                         PrintAndLog(" Hitag2 (2*)");
 238                         PrintAndLog("  21 <password> (password mode)");
 239                         PrintAndLog("  22 <nr> <ar> (authentication)");
 240                         PrintAndLog("  23 <key> (authentication) key is in format: ISK high + ISK low");
 241                         PrintAndLog("  25 (test recorded authentications)");
 242                         PrintAndLog("  26 just read UID");
 243                         return 1;
 244                 } break;
 245         }
 246
 247         // Copy the hitag2 function into the first argument
 248         c.arg[0] = htf;
 249         clearCommandBuffer();
 250         SendCommand(&c);
 251         UsbCommand resp;
 252         WaitForResponse(CMD_ACK,&resp);
 253
 254         // Check the return status, stored in the first argument
 255         if (resp.arg[0] == false) return 1;
 256
 257         uint32_t id = bytes_to_num(resp.d.asBytes,4);
 258
 259         if (htf == RHT2F_UID_ONLY){
 260                 PrintAndLog("Valid Hitag2 tag found - UID: %08x",id);
 261         } else {
 262         char filename[FILE_PATH_SIZE];
 263         FILE* f = NULL;
 264         sprintf(filename,"%08x_%04x.ht2",id,(rand() & 0xffff));
 265         f = fopen(filename,"wb");
 266         if (!f) {
 267                 PrintAndLog("Error: Could not open file [%s]",filename);
 268                 return 1;
 269         }
 270
 271         // Write the 48 tag memory bytes to file and finalize
 272         fwrite(resp.d.asBytes, 1, 48, f);
 273         fclose(f);
 274         PrintAndLog("Succesfully saved tag memory to [%s]",filename);
 275         }
 276         return 0;
 277 }
 278
 279 int CmdLFHitagSimS(const char *Cmd) {
 280         UsbCommand c = { CMD_SIMULATE_HITAG_S };
 281         char filename[FILE_PATH_SIZE] = { 0x00 };
 282         FILE* f;
 283         bool tag_mem_supplied;
 284         int len = strlen(Cmd);
 285         if (len > FILE_PATH_SIZE)
 286                 len = FILE_PATH_SIZE;
 287         memcpy(filename, Cmd, len);
 288
 289         if (strlen(filename) > 0) {
 290                 f = fopen(filename, "rb+");
 291                 if (!f) {
 292                         PrintAndLog("Error: Could not open file [%s]", filename);
 293                         return 1;
 294                 }
 295                 tag_mem_supplied = true;
 296                 size_t bytes_read = fread(c.d.asBytes, 4*64, 1, f);
 297                 if ( bytes_read == 0) {
 298                         PrintAndLog("Error: File reading error");
 299                         fclose(f);
 300                         return 1;
 301                 }
 302                 fclose(f);
 303         } else {
 304                 tag_mem_supplied = false;
 305         }
 306
 307         // Does the tag comes with memory
 308         c.arg[0] = (uint32_t) tag_mem_supplied;
 309         clearCommandBuffer();
 310         SendCommand(&c);
 311         return 0;
 312 }
 313
 314 int CmdLFHitagCheckChallenges(const char *Cmd) {
 315         UsbCommand c = { CMD_TEST_HITAGS_TRACES };
 316         char filename[FILE_PATH_SIZE] = { 0x00 };
 317         FILE* f;
 318         bool file_given;
 319         int len = strlen(Cmd);
 320         if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
 321         memcpy(filename, Cmd, len);
 322
 323         if (strlen(filename) > 0) {
 324                 f = fopen(filename,"rb+");
 325                 if( !f ) {
 326                         PrintAndLog("Error: Could not open file [%s]", filename);
 327                         return 1;
 328                 }
 329                 file_given = true;
 330                 size_t bytes_read = fread(c.d.asBytes, 8*60, 1, f);
 331                 if ( bytes_read == 0) {
 332                         PrintAndLog("Error: File reading error");
 333                         fclose(f);
 334                         return 1;
 335         }
 336                 fclose(f);
 337         } else {
 338                 file_given = false;
 339         }
 340
 341         //file with all the challenges to try
 342         c.arg[0] = (uint32_t)file_given;
 343         clearCommandBuffer();
 344         SendCommand(&c);
 345         return 0;
 346 }
 347
 348 int CmdLFHitagWP(const char *Cmd) {
 349         UsbCommand c = { CMD_WR_HITAG_S };
 350         hitag_data* htd = (hitag_data*)c.d.asBytes;
 351         hitag_function htf = param_get32ex(Cmd,0,0,10);
 352         switch (htf) {
 353                 case 03: { //WHTSF_CHALLENGE
 354                         num_to_bytes(param_get64ex(Cmd,1,0,16),8,htd->auth.NrAr);
 355                         c.arg[2]= param_get32ex(Cmd, 2, 0, 10);
 356                         num_to_bytes(param_get32ex(Cmd,3,0,16),4,htd->auth.data);
 357                 } break;
 358                 case 04: { //WHTSF_KEY
 359                         num_to_bytes(param_get64ex(Cmd,1,0,16),6,htd->crypto.key);
 360                         c.arg[2]= param_get32ex(Cmd, 2, 0, 10);
 361                         num_to_bytes(param_get32ex(Cmd,3,0,16),4,htd->crypto.data);
 362
 363                 } break;
 364                 default: {
 365                         PrintAndLog("Error: unkown writer function %d",htf);
 366                         PrintAndLog("Hitag writer functions");
 367                         PrintAndLog(" HitagS (0*)");
 368                         PrintAndLog("  03 <nr,ar> (Challenge) <page> <byte0...byte3> write page on a Hitag S tag");
 369                         PrintAndLog("  04 <key> (set to 0 if no authentication is needed) <page> <byte0...byte3> write page on a Hitag S tag");
 370                         PrintAndLog(" Hitag1 (1*)");
 371                         PrintAndLog(" Hitag2 (2*)");
 372                         return 1;
 373                 } break;
 374         }
 375         // Copy the hitag function into the first argument
 376         c.arg[0] = htf;
 377
 378         clearCommandBuffer();
 379         SendCommand(&c);
 380         UsbCommand resp;
 381         WaitForResponse(CMD_ACK,&resp);
 382
 383         // Check the return status, stored in the first argument
 384         if (resp.arg[0] == false) return 1;
 385         return 0;
 386 }
 387
 388 static command_t CommandTable[] =
 389 {
 390         {"help",    CmdHelp,           1, "This help"},
 391         {"list",    CmdLFHitagList,    1, "<outfile> List Hitag trace history"},
 392         {"reader",  CmdLFHitagReader,  1, "Act like a Hitag Reader"},
 393         {"sim",     CmdLFHitagSim,     1, "<infile> Simulate Hitag transponder"},
 394         {"snoop",   CmdLFHitagSnoop,   1, "Eavesdrop Hitag communication"},
 395   {"writer",            CmdLFHitagWP,      1, "Act like a Hitag Writer" },
 396   {"simS",              CmdLFHitagSimS,    1, "<hitagS.hts> Simulate HitagS transponder" },
 397   {"checkChallenges",   CmdLFHitagCheckChallenges,   1, "<challenges.cc> test all challenges" }, {
 398                                 NULL,NULL, 0, NULL }
 399 };
 400
 401 int CmdLFHitag(const char *Cmd) {
 402         clearCommandBuffer();
 403         CmdsParse(CommandTable, Cmd);
 404         return 0;
 405 }
 406
 407 int CmdHelp(const char *Cmd) {
 408         CmdsHelp(CommandTable);
 409         return 0;
 410 }