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 "cmdlfhitag.h"
  12
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <string.h>
  16 #include "comms.h"
  17 #include "ui.h"
  18 #include "cmdparser.h"
  19 #include "common.h"
  20 #include "util.h"
  21 #include "parity.h"
  22 #include "hitag2.h"
  23 #include "hitagS.h"
  24 #include "cmdmain.h"
  25
  26 static int CmdHelp(const char *Cmd);
  27
  28 size_t nbytes(size_t nbits) {
  29         return (nbits/8)+((nbits%8)>0);
  30 }
  31
  32 int CmdLFHitagList(const char *Cmd)
  33 {
  34         uint8_t *got = malloc(USB_CMD_DATA_SIZE);
  35
  36         // Query for the actual size of the trace
  37         UsbCommand response;
  38         GetFromBigBuf(got, USB_CMD_DATA_SIZE, 0, &response, -1, false);
  39         uint16_t traceLen = response.arg[2];
  40         if (traceLen > USB_CMD_DATA_SIZE) {
  41                 uint8_t *p = realloc(got, traceLen);
  42                 if (p == NULL) {
  43                         PrintAndLog("Cannot allocate memory for trace");
  44                         free(got);
  45                         return 2;
  46                 }
  47                 got = p;
  48                 GetFromBigBuf(got, traceLen, 0, NULL, -1, false);
  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* pf = NULL;
  61
  62         if (len > FILE_PATH_SIZE)
  63                 len = FILE_PATH_SIZE;
  64         memcpy(filename, Cmd, len);
  65
  66         if (strlen(filename) > 0) {
  67                 if ((pf = fopen(filename,"wb")) == NULL) {
  68                         PrintAndLog("Error: Could not open file [%s]",filename);
  69                         free(got);
  70                         return 1;
  71                 }
  72         }
  73
  74         for (;;) {
  75
  76                 if(i > traceLen) { break; }
  77
  78                 bool isResponse;
  79                 int timestamp = *((uint32_t *)(got+i));
  80                 if (timestamp & 0x80000000) {
  81                         timestamp &= 0x7fffffff;
  82                         isResponse = 1;
  83                 } else {
  84                         isResponse = 0;
  85                 }
  86
  87                 int parityBits = *((uint32_t *)(got+i+4));
  88                 // 4 bytes of additional information...
  89                 // maximum of 32 additional parity bit information
  90                 //
  91                 // TODO:
  92                 // at each quarter bit period we can send power level (16 levels)
  93                 // or each half bit period in 256 levels.
  94
  95                 int bits = got[i+8];
  96                 int len = nbytes(got[i+8]);
  97
  98                 if (len > 100) {
  99                   break;
 100                 }
 101                 if (i + len > traceLen) { break;}
 102
 103                 uint8_t *frame = (got+i+9);
 104
 105                 // Break and stick with current result if buffer was not completely full
 106                 if (frame[0] == 0x44 && frame[1] == 0x44 && frame[3] == 0x44) { break; }
 107
 108                 char line[1000] = "";
 109                 int j;
 110                 for (j = 0; j < len; j++) {
 111
 112                   //if((parityBits >> (len - j - 1)) & 0x01) {
 113                   if (isResponse && (oddparity8(frame[j]) != ((parityBits >> (len - j - 1)) & 0x01))) {
 114                         sprintf(line+(j*4), "%02x!  ", frame[j]);
 115                   }
 116                   else {
 117                         sprintf(line+(j*4), "%02x   ", frame[j]);
 118                   }
 119                 }
 120
 121                 PrintAndLog(" +%7d:  %3d: %s %s",
 122                         (prev < 0 ? 0 : (timestamp - prev)),
 123                         bits,
 124                         (isResponse ? "TAG" : "   "),
 125                         line);
 126
 127                 if (pf) {
 128                         fprintf(pf," +%7d:  %3d: %s %s\n",
 129                                 (prev < 0 ? 0 : (timestamp - prev)),
 130                                 bits,
 131                                 (isResponse ? "TAG" : "   "),
 132                                 line);
 133                 }
 134
 135                 prev = timestamp;
 136                 i += (len + 9);
 137         }
 138
 139         if (pf) {
 140                 fclose(pf);
 141                 PrintAndLog("Recorded activity succesfully written to file: %s", filename);
 142         }
 143
 144         free(got);
 145         return 0;
 146 }
 147
 148 int CmdLFHitagSnoop(const char *Cmd) {
 149   UsbCommand c = {CMD_SNOOP_HITAG};
 150   SendCommand(&c);
 151   return 0;
 152 }
 153
 154 int CmdLFHitagSim(const char *Cmd) {
 155
 156   UsbCommand c = {CMD_SIMULATE_HITAG};
 157         char filename[FILE_PATH_SIZE] = { 0x00 };
 158         FILE* pf;
 159         bool tag_mem_supplied;
 160         int len = strlen(Cmd);
 161         if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
 162         memcpy(filename, Cmd, len);
 163
 164         if (strlen(filename) > 0) {
 165                 if ((pf = fopen(filename,"rb+")) == NULL) {
 166                         PrintAndLog("Error: Could not open file [%s]",filename);
 167                         return 1;
 168                 }
 169                 tag_mem_supplied = true;
 170                 if (fread(c.d.asBytes,1,48,pf) != 48) {
 171                         PrintAndLog("Error: File reading error");
 172                         fclose(pf);
 173                         return 1;
 174                 }
 175                 fclose(pf);
 176         } else {
 177                 tag_mem_supplied = false;
 178         }
 179
 180         // Does the tag comes with memory
 181         c.arg[0] = (uint32_t)tag_mem_supplied;
 182
 183   SendCommand(&c);
 184   return 0;
 185 }
 186
 187 int CmdLFHitagReader(const char *Cmd) {
 188         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)}};
 189         hitag_data* htd = (hitag_data*)c.d.asBytes;
 190         hitag_function htf = param_get32ex(Cmd,0,0,10);
 191
 192         switch (htf) {
 193                 case 01: { //RHTSF_CHALLENGE
 194                         c = (UsbCommand){ CMD_READ_HITAG_S };
 195                         num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->auth.NrAr);
 196                         num_to_bytes(param_get32ex(Cmd,2,0,16),4,htd->auth.NrAr+4);
 197                 } break;
 198                 case 02: { //RHTSF_KEY
 199                         c = (UsbCommand){ CMD_READ_HITAG_S };
 200                         num_to_bytes(param_get64ex(Cmd,1,0,16),6,htd->crypto.key);
 201                 } break;
 202                 case RHT2F_PASSWORD: {
 203                         num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->pwd.password);
 204                 } break;
 205                 case RHT2F_AUTHENTICATE: {
 206                         num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->auth.NrAr);
 207                         num_to_bytes(param_get32ex(Cmd,2,0,16),4,htd->auth.NrAr+4);
 208                 } break;
 209                 case RHT2F_CRYPTO: {
 210                         num_to_bytes(param_get64ex(Cmd,1,0,16),6,htd->crypto.key);
 211                         //                      num_to_bytes(param_get32ex(Cmd,2,0,16),4,htd->auth.NrAr+4);
 212                 } break;
 213                 case RHT2F_TEST_AUTH_ATTEMPTS: {
 214                         // No additional parameters needed
 215                 } break;
 216                 case RHT2F_UID_ONLY: {
 217                         // No additional parameters needed
 218                 } break;
 219                 default: {
 220                         PrintAndLog("\nError: unkown reader function %d",htf);
 221                         PrintAndLog("");
 222                         PrintAndLog("Usage: hitag reader <Reader Function #>");
 223                         PrintAndLog("Reader Functions:");
 224                         PrintAndLog(" HitagS (0*)");
 225                         PrintAndLog("  01 <nr> <ar> (Challenge) read all pages from a Hitag S tag");
 226                         PrintAndLog("  02 <key> (set to 0 if no authentication is needed) read all pages from a Hitag S tag");
 227                         PrintAndLog(" Hitag1 (1*)");
 228                         PrintAndLog(" Hitag2 (2*)");
 229                         PrintAndLog("  21 <password> (password mode)");
 230                         PrintAndLog("  22 <nr> <ar> (authentication)");
 231                         PrintAndLog("  23 <key> (authentication) key is in format: ISK high + ISK low");
 232                         PrintAndLog("  25 (test recorded authentications)");
 233                         PrintAndLog("  26 just read UID");
 234                         return 1;
 235                 } break;
 236         }
 237
 238         // Copy the hitag2 function into the first argument
 239         c.arg[0] = htf;
 240
 241         // Send the command to the proxmark
 242         clearCommandBuffer();
 243         SendCommand(&c);
 244
 245         UsbCommand resp;
 246         WaitForResponse(CMD_ACK,&resp);
 247
 248         // Check the return status, stored in the first argument
 249         if (resp.arg[0] == false) return 1;
 250
 251         uint32_t id = bytes_to_num(resp.d.asBytes,4);
 252
 253         if (htf == RHT2F_UID_ONLY){
 254                 PrintAndLog("Valid Hitag2 tag found - UID: %08x",id);
 255         } else {
 256                 char filename[256];
 257                 FILE* pf = NULL;
 258
 259                 sprintf(filename,"%08x_%04x.ht2",id,(rand() & 0xffff));
 260                 if ((pf = fopen(filename,"wb")) == NULL) {
 261                   PrintAndLog("Error: Could not open file [%s]",filename);
 262                   return 1;
 263                 }
 264
 265                 // Write the 48 tag memory bytes to file and finalize
 266                 fwrite(resp.d.asBytes,1,48,pf);
 267                 fclose(pf);
 268
 269                 PrintAndLog("Succesfully saved tag memory to [%s]",filename);
 270         }
 271
 272
 273         return 0;
 274 }
 275
 276
 277 int CmdLFHitagSimS(const char *Cmd) {
 278         UsbCommand c = { CMD_SIMULATE_HITAG_S };
 279         char filename[FILE_PATH_SIZE] = { 0x00 };
 280         FILE* pf;
 281         bool tag_mem_supplied;
 282         int len = strlen(Cmd);
 283         if (len > FILE_PATH_SIZE)
 284                 len = FILE_PATH_SIZE;
 285         memcpy(filename, Cmd, len);
 286
 287         if (strlen(filename) > 0) {
 288                 if ((pf = fopen(filename, "rb+")) == NULL) {
 289                         PrintAndLog("Error: Could not open file [%s]", filename);
 290                         return 1;
 291                 }
 292                 tag_mem_supplied = true;
 293                 if (fread(c.d.asBytes, 1, 4*64, pf) != 4*64) {
 294                         PrintAndLog("Error: File reading error");
 295                         fclose(pf);
 296                         return 1;
 297                 }
 298                 fclose(pf);
 299         } else {
 300                 tag_mem_supplied = false;
 301         }
 302
 303         // Does the tag comes with memory
 304         c.arg[0] = (uint32_t) tag_mem_supplied;
 305
 306         SendCommand(&c);
 307         return 0;
 308 }
 309
 310 int CmdLFHitagCheckChallenges(const char *Cmd) {
 311         UsbCommand c = { CMD_TEST_HITAGS_TRACES };
 312         char filename[FILE_PATH_SIZE] = { 0x00 };
 313         FILE* pf;
 314         bool file_given;
 315         int len = strlen(Cmd);
 316         if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
 317         memcpy(filename, Cmd, len);
 318
 319         if (strlen(filename) > 0) {
 320                 if ((pf = fopen(filename,"rb+")) == NULL) {
 321                         PrintAndLog("Error: Could not open file [%s]",filename);
 322                         return 1;
 323                 }
 324                 file_given = true;
 325                 if (fread(c.d.asBytes,1,8*60,pf) != 8*60) {
 326                         PrintAndLog("Error: File reading error");
 327                         fclose(pf);
 328                         return 1;
 329         }
 330                 fclose(pf);
 331         } else {
 332                 file_given = false;
 333         }
 334
 335         //file with all the challenges to try
 336         c.arg[0] = (uint32_t)file_given;
 337
 338   SendCommand(&c);
 339   return 0;
 340 }
 341
 342
 343 int CmdLFHitagWP(const char *Cmd) {
 344         UsbCommand c = { CMD_WR_HITAG_S };
 345         hitag_data* htd = (hitag_data*)c.d.asBytes;
 346         hitag_function htf = param_get32ex(Cmd,0,0,10);
 347         switch (htf) {
 348                 case 03: { //WHTSF_CHALLENGE
 349                         num_to_bytes(param_get64ex(Cmd,1,0,16),8,htd->auth.NrAr);
 350                         c.arg[2]= param_get32ex(Cmd, 2, 0, 10);
 351                         num_to_bytes(param_get32ex(Cmd,3,0,16),4,htd->auth.data);
 352                 } break;
 353                 case 04:
 354                 case 24:
 355                 { //WHTSF_KEY
 356                         num_to_bytes(param_get64ex(Cmd,1,0,16),6,htd->crypto.key);
 357                         c.arg[2]= param_get32ex(Cmd, 2, 0, 10);
 358                         num_to_bytes(param_get32ex(Cmd,3,0,16),4,htd->crypto.data);
 359
 360                 } break;
 361                 default: {
 362                         PrintAndLog("Error: unkown writer function %d",htf);
 363                         PrintAndLog("Hitag writer functions");
 364                         PrintAndLog(" HitagS (0*)");
 365                         PrintAndLog("  03 <nr,ar> (Challenge) <page> <byte0...byte3> write page on a Hitag S tag");
 366                         PrintAndLog("  04 <key> (set to 0 if no authentication is needed) <page> <byte0...byte3> write page on a Hitag S tag");
 367                         PrintAndLog(" Hitag1 (1*)");
 368                         PrintAndLog(" Hitag2 (2*)");
 369                         PrintAndLog("  24 <key> (set to 0 if no authentication is needed) <page> <byte0...byte3> write page on a Hitag S tag");
 370                         return 1;
 371                 } break;
 372         }
 373         // Copy the hitag function into the first argument
 374         c.arg[0] = htf;
 375
 376   // Send the command to the proxmark
 377   SendCommand(&c);
 378
 379   UsbCommand resp;
 380   WaitForResponse(CMD_ACK,&resp);
 381
 382   // Check the return status, stored in the first argument
 383   if (resp.arg[0] == false) return 1;
 384   return 0;
 385 }
 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 {
 403   CmdsParse(CommandTable, Cmd);
 404   return 0;
 405 }
 406
 407 int CmdHelp(const char *Cmd)
 408 {
 409   CmdsHelp(CommandTable);
 410   return 0;
 411 }