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                         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
 111                   //if((parityBits >> (len - j - 1)) & 0x01) {
 112                   if (isResponse && (oddparity8(frame[j]) != ((parityBits >> (len - j - 1)) & 0x01))) {
 113                         sprintf(line+(j*4), "%02x!  ", frame[j]);
 114                   }
 115                   else {
 116                         sprintf(line+(j*4), "%02x   ", frame[j]);
 117                   }
 118                 }
 119
 120                 PrintAndLog(" +%7d:  %3d: %s %s",
 121                         (prev < 0 ? 0 : (timestamp - prev)),
 122                         bits,
 123                         (isResponse ? "TAG" : "   "),
 124                         line);
 125
 126                 if (pf) {
 127                         fprintf(pf," +%7d:  %3d: %s %s\n",
 128                                 (prev < 0 ? 0 : (timestamp - prev)),
 129                                 bits,
 130                                 (isResponse ? "TAG" : "   "),
 131                                 line);
 132                 }
 133
 134                 prev = timestamp;
 135                 i += (len + 9);
 136         }
 137
 138         if (pf) {
 139                 fclose(pf);
 140                 PrintAndLog("Recorded activity succesfully written to file: %s", filename);
 141         }
 142
 143         free(got);
 144         return 0;
 145 }
 146
 147 int CmdLFHitagSnoop(const char *Cmd) {
 148   UsbCommand c = {CMD_SNOOP_HITAG};
 149   SendCommand(&c);
 150   return 0;
 151 }
 152
 153 int CmdLFHitagSim(const char *Cmd) {
 154
 155   UsbCommand c = {CMD_SIMULATE_HITAG};
 156         char filename[FILE_PATH_SIZE] = { 0x00 };
 157         FILE* pf;
 158         bool tag_mem_supplied;
 159         int len = strlen(Cmd);
 160         if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
 161         memcpy(filename, Cmd, len);
 162
 163         if (strlen(filename) > 0) {
 164                 if ((pf = fopen(filename,"rb+")) == NULL) {
 165                         PrintAndLog("Error: Could not open file [%s]",filename);
 166                         return 1;
 167                 }
 168                 tag_mem_supplied = true;
 169                 if (fread(c.d.asBytes,48,1,pf) == 0) {
 170       PrintAndLog("Error: File reading error");
 171       fclose(pf);
 172                         return 1;
 173     }
 174                 fclose(pf);
 175         } else {
 176                 tag_mem_supplied = false;
 177         }
 178
 179         // Does the tag comes with memory
 180         c.arg[0] = (uint32_t)tag_mem_supplied;
 181
 182   SendCommand(&c);
 183   return 0;
 184 }
 185
 186 int CmdLFHitagReader(const char *Cmd) {
 187         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)}};
 188         hitag_data* htd = (hitag_data*)c.d.asBytes;
 189         hitag_function htf = param_get32ex(Cmd,0,0,10);
 190
 191         switch (htf) {
 192                 case 01: { //RHTSF_CHALLENGE
 193                         c = (UsbCommand){ CMD_READ_HITAG_S };
 194                         num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->auth.NrAr);
 195                         num_to_bytes(param_get32ex(Cmd,2,0,16),4,htd->auth.NrAr+4);
 196                 } break;
 197                 case 02: { //RHTSF_KEY
 198                         c = (UsbCommand){ CMD_READ_HITAG_S };
 199                         num_to_bytes(param_get64ex(Cmd,1,0,16),6,htd->crypto.key);
 200                 } break;
 201                 case RHT2F_PASSWORD: {
 202                         num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->pwd.password);
 203                 } break;
 204                 case RHT2F_AUTHENTICATE: {
 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 RHT2F_CRYPTO: {
 209                         num_to_bytes(param_get64ex(Cmd,1,0,16),6,htd->crypto.key);
 210                         //                      num_to_bytes(param_get32ex(Cmd,2,0,16),4,htd->auth.NrAr+4);
 211                 } break;
 212                 case RHT2F_TEST_AUTH_ATTEMPTS: {
 213                         // No additional parameters needed
 214                 } break;
 215                 case RHT2F_UID_ONLY: {
 216                         // No additional parameters needed
 217                 } break;
 218                 default: {
 219                         PrintAndLog("\nError: unkown reader function %d",htf);
 220                         PrintAndLog("");
 221                         PrintAndLog("Usage: hitag reader <Reader Function #>");
 222                         PrintAndLog("Reader Functions:");
 223                         PrintAndLog(" HitagS (0*)");
 224                         PrintAndLog("  01 <nr> <ar> (Challenge) read all pages from a Hitag S tag");
 225                         PrintAndLog("  02 <key> (set to 0 if no authentication is needed) read all pages from a Hitag S tag");
 226                         PrintAndLog(" Hitag1 (1*)");
 227                         PrintAndLog(" Hitag2 (2*)");
 228                         PrintAndLog("  21 <password> (password mode)");
 229                         PrintAndLog("  22 <nr> <ar> (authentication)");
 230                         PrintAndLog("  23 <key> (authentication) key is in format: ISK high + ISK low");
 231                         PrintAndLog("  25 (test recorded authentications)");
 232                         PrintAndLog("  26 just read UID");
 233                         return 1;
 234                 } break;
 235         }
 236
 237         // Copy the hitag2 function into the first argument
 238         c.arg[0] = htf;
 239
 240         // Send the command to the proxmark
 241         clearCommandBuffer();
 242         SendCommand(&c);
 243
 244         UsbCommand resp;
 245         WaitForResponse(CMD_ACK,&resp);
 246
 247         // Check the return status, stored in the first argument
 248         if (resp.arg[0] == false) return 1;
 249
 250         uint32_t id = bytes_to_num(resp.d.asBytes,4);
 251
 252         if (htf == RHT2F_UID_ONLY){
 253                 PrintAndLog("Valid Hitag2 tag found - UID: %08x",id);
 254         } else {
 255                 char filename[256];
 256                 FILE* pf = NULL;
 257
 258                 sprintf(filename,"%08x_%04x.ht2",id,(rand() & 0xffff));
 259                 if ((pf = fopen(filename,"wb")) == NULL) {
 260                   PrintAndLog("Error: Could not open file [%s]",filename);
 261                   return 1;
 262                 }
 263
 264                 // Write the 48 tag memory bytes to file and finalize
 265                 fwrite(resp.d.asBytes,1,48,pf);
 266                 fclose(pf);
 267
 268                 PrintAndLog("Succesfully saved tag memory to [%s]",filename);
 269         }
 270
 271
 272         return 0;
 273 }
 274
 275
 276 int CmdLFHitagSimS(const char *Cmd) {
 277         UsbCommand c = { CMD_SIMULATE_HITAG_S };
 278         char filename[FILE_PATH_SIZE] = { 0x00 };
 279         FILE* pf;
 280         bool tag_mem_supplied;
 281         int len = strlen(Cmd);
 282         if (len > FILE_PATH_SIZE)
 283                 len = FILE_PATH_SIZE;
 284         memcpy(filename, Cmd, len);
 285
 286         if (strlen(filename) > 0) {
 287                 if ((pf = fopen(filename, "rb+")) == NULL) {
 288                         PrintAndLog("Error: Could not open file [%s]", filename);
 289                         return 1;
 290                 }
 291                 tag_mem_supplied = true;
 292                 if (fread(c.d.asBytes, 4*64, 1, pf) == 0) {
 293                         PrintAndLog("Error: File reading error");
 294                         fclose(pf);
 295                         return 1;
 296                 }
 297                 fclose(pf);
 298         } else {
 299                 tag_mem_supplied = false;
 300         }
 301
 302         // Does the tag comes with memory
 303         c.arg[0] = (uint32_t) tag_mem_supplied;
 304
 305         SendCommand(&c);
 306         return 0;
 307 }
 308
 309 int CmdLFHitagCheckChallenges(const char *Cmd) {
 310         UsbCommand c = { CMD_TEST_HITAGS_TRACES };
 311         char filename[FILE_PATH_SIZE] = { 0x00 };
 312         FILE* pf;
 313         bool file_given;
 314         int len = strlen(Cmd);
 315         if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
 316         memcpy(filename, Cmd, len);
 317
 318         if (strlen(filename) > 0) {
 319                 if ((pf = fopen(filename,"rb+")) == NULL) {
 320                         PrintAndLog("Error: Could not open file [%s]",filename);
 321                         return 1;
 322                 }
 323                 file_given = true;
 324                 if (fread(c.d.asBytes,8*60,1,pf) == 0) {
 325       PrintAndLog("Error: File reading error");
 326       fclose(pf);
 327                         return 1;
 328         }
 329                 fclose(pf);
 330         } else {
 331                 file_given = false;
 332         }
 333
 334         //file with all the challenges to try
 335         c.arg[0] = (uint32_t)file_given;
 336
 337   SendCommand(&c);
 338   return 0;
 339 }
 340
 341
 342 int CmdLFHitagWP(const char *Cmd) {
 343         UsbCommand c = { CMD_WR_HITAG_S };
 344         hitag_data* htd = (hitag_data*)c.d.asBytes;
 345         hitag_function htf = param_get32ex(Cmd,0,0,10);
 346         switch (htf) {
 347                 case 03: { //WHTSF_CHALLENGE
 348                         num_to_bytes(param_get64ex(Cmd,1,0,16),8,htd->auth.NrAr);
 349                         c.arg[2]= param_get32ex(Cmd, 2, 0, 10);
 350                         num_to_bytes(param_get32ex(Cmd,3,0,16),4,htd->auth.data);
 351                 } break;
 352                 case 04:
 353                 case 24:
 354                 { //WHTSF_KEY
 355                         num_to_bytes(param_get64ex(Cmd,1,0,16),6,htd->crypto.key);
 356                         c.arg[2]= param_get32ex(Cmd, 2, 0, 10);
 357                         num_to_bytes(param_get32ex(Cmd,3,0,16),4,htd->crypto.data);
 358
 359                 } break;
 360                 default: {
 361                         PrintAndLog("Error: unkown writer function %d",htf);
 362                         PrintAndLog("Hitag writer functions");
 363                         PrintAndLog(" HitagS (0*)");
 364                         PrintAndLog("  03 <nr,ar> (Challenge) <page> <byte0...byte3> write page on a Hitag S tag");
 365                         PrintAndLog("  04 <key> (set to 0 if no authentication is needed) <page> <byte0...byte3> write page on a Hitag S tag");
 366                         PrintAndLog(" Hitag1 (1*)");
 367                         PrintAndLog(" Hitag2 (2*)");
 368                         PrintAndLog("  24 <key> (set to 0 if no authentication is needed) <page> <byte0...byte3> write page on a Hitag S tag");
 369                         return 1;
 370                 } break;
 371         }
 372         // Copy the hitag function into the first argument
 373         c.arg[0] = htf;
 374
 375   // Send the command to the proxmark
 376   SendCommand(&c);
 377
 378   UsbCommand resp;
 379   WaitForResponse(CMD_ACK,&resp);
 380
 381   // Check the return status, stored in the first argument
 382   if (resp.arg[0] == false) return 1;
 383   return 0;
 384 }
 385
 386
 387 static command_t CommandTable[] =
 388 {
 389   {"help",              CmdHelp,           1, "This help"},
 390   {"list",              CmdLFHitagList,    1, "<outfile> List Hitag trace history"},
 391   {"reader",            CmdLFHitagReader,  1, "Act like a Hitag Reader"},
 392   {"sim",               CmdLFHitagSim,     1, "<infile> Simulate Hitag transponder"},
 393   {"snoop",             CmdLFHitagSnoop,   1, "Eavesdrop Hitag communication"},
 394   {"writer",            CmdLFHitagWP,      1, "Act like a Hitag Writer" },
 395   {"simS",              CmdLFHitagSimS,    1, "<hitagS.hts> Simulate HitagS transponder" },
 396   {"checkChallenges",   CmdLFHitagCheckChallenges,   1, "<challenges.cc> test all challenges" }, {
 397                                 NULL,NULL, 0, NULL }
 398 };
 399
 400 int CmdLFHitag(const char *Cmd)
 401 {
 402   CmdsParse(CommandTable, Cmd);
 403   return 0;
 404 }
 405
 406 int CmdHelp(const char *Cmd)
 407 {
 408   CmdsHelp(CommandTable);
 409   return 0;
 410 }