git.zerfleddert.de Git - proxmark3-svn/blob - client/cmdhf14b.c

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
   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 // High frequency ISO14443B commands
   9 //-----------------------------------------------------------------------------
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <stdbool.h>
  14 #include <string.h>
  15 #include <stdint.h>
  16 #include "iso14443crc.h"
  17 #include "proxmark3.h"
  18 #include "data.h"
  19 #include "graph.h"
  20 #include "util.h"
  21 #include "ui.h"
  22 #include "cmdparser.h"
  23 #include "cmdhf14b.h"
  24 #include "cmdmain.h"
  25
  26 static int CmdHelp(const char *Cmd);
  27
  28 int CmdHF14BDemod(const char *Cmd)
  29 {
  30   int i, j, iold;
  31   int isum, qsum;
  32   int outOfWeakAt;
  33   bool negateI, negateQ;
  34
  35   uint8_t data[256];
  36   int dataLen = 0;
  37
  38   // As received, the samples are pairs, correlations against I and Q
  39   // square waves. So estimate angle of initial carrier (or just
  40   // quadrant, actually), and then do the demod.
  41
  42   // First, estimate where the tag starts modulating.
  43   for (i = 0; i < GraphTraceLen; i += 2) {
  44     if (abs(GraphBuffer[i]) + abs(GraphBuffer[i + 1]) > 40) {
  45       break;
  46     }
  47   }
  48   if (i >= GraphTraceLen) {
  49     PrintAndLog("too weak to sync");
  50     return 0;
  51   }
  52   PrintAndLog("out of weak at %d", i);
  53   outOfWeakAt = i;
  54
  55   // Now, estimate the phase in the initial modulation of the tag
  56   isum = 0;
  57   qsum = 0;
  58   for (; i < (outOfWeakAt + 16); i += 2) {
  59     isum += GraphBuffer[i + 0];
  60     qsum += GraphBuffer[i + 1];
  61   }
  62   negateI = (isum < 0);
  63   negateQ = (qsum < 0);
  64
  65   // Turn the correlation pairs into soft decisions on the bit.
  66   j = 0;
  67   for (i = 0; i < GraphTraceLen / 2; i++) {
  68     int si = GraphBuffer[j];
  69     int sq = GraphBuffer[j + 1];
  70     if (negateI) si = -si;
  71     if (negateQ) sq = -sq;
  72     GraphBuffer[i] = si + sq;
  73     j += 2;
  74   }
  75   GraphTraceLen = i;
  76
  77   i = outOfWeakAt / 2;
  78   while (GraphBuffer[i] > 0 && i < GraphTraceLen)
  79     i++;
  80   if (i >= GraphTraceLen) goto demodError;
  81
  82   iold = i;
  83   while (GraphBuffer[i] < 0 && i < GraphTraceLen)
  84     i++;
  85   if (i >= GraphTraceLen) goto demodError;
  86   if ((i - iold) > 23) goto demodError;
  87
  88   PrintAndLog("make it to demod loop");
  89
  90   for (;;) {
  91     iold = i;
  92     while (GraphBuffer[i] >= 0 && i < GraphTraceLen)
  93       i++;
  94     if (i >= GraphTraceLen) goto demodError;
  95     if ((i - iold) > 6) goto demodError;
  96
  97     uint16_t shiftReg = 0;
  98     if (i + 20 >= GraphTraceLen) goto demodError;
  99
 100     for (j = 0; j < 10; j++) {
 101       int soft = GraphBuffer[i] + GraphBuffer[i + 1];
 102
 103       if (abs(soft) < (abs(isum) + abs(qsum)) / 20) {
 104         PrintAndLog("weak bit");
 105       }
 106
 107       shiftReg >>= 1;
 108       if(GraphBuffer[i] + GraphBuffer[i+1] >= 0) {
 109         shiftReg |= 0x200;
 110       }
 111
 112       i+= 2;
 113     }
 114
 115     if ((shiftReg & 0x200) && !(shiftReg & 0x001))
 116     {
 117       // valid data byte, start and stop bits okay
 118       PrintAndLog("   %02x", (shiftReg >> 1) & 0xff);
 119       data[dataLen++] = (shiftReg >> 1) & 0xff;
 120       if (dataLen >= sizeof(data)) {
 121         return 0;
 122       }
 123     } else if (shiftReg == 0x000) {
 124       // this is EOF
 125       break;
 126     } else {
 127       goto demodError;
 128     }
 129   }
 130
 131   uint8_t first, second;
 132   ComputeCrc14443(CRC_14443_B, data, dataLen-2, &first, &second);
 133   PrintAndLog("CRC: %02x %02x (%s)\n", first, second,
 134     (first == data[dataLen-2] && second == data[dataLen-1]) ?
 135       "ok" : "****FAIL****");
 136
 137   RepaintGraphWindow();
 138   return 0;
 139
 140 demodError:
 141   PrintAndLog("demod error");
 142   RepaintGraphWindow();
 143   return 0;
 144 }
 145
 146 int CmdHF14BList(const char *Cmd)
 147 {
 148   uint8_t got[TRACE_BUFFER_SIZE];
 149   GetFromBigBuf(got,sizeof(got),0);
 150   WaitForResponse(CMD_ACK,NULL);
 151
 152   PrintAndLog("recorded activity:");
 153   PrintAndLog(" time  :rssi: who bytes");
 154   PrintAndLog("---------+----+----+-----------");
 155
 156   int i = 0;
 157   int prev = -1;
 158
 159   for(;;) {
 160
 161         if(i >= TRACE_BUFFER_SIZE) { break; }
 162
 163     bool isResponse;
 164     int timestamp = *((uint32_t *)(got+i));
 165     if(timestamp & 0x80000000) {
 166       timestamp &= 0x7fffffff;
 167       isResponse = 1;
 168     } else {
 169       isResponse = 0;
 170     }
 171     int metric = *((uint32_t *)(got+i+4));
 172
 173     int len = got[i+8];
 174
 175     if(len > 100) {
 176       break;
 177     }
 178     if(i + len >= TRACE_BUFFER_SIZE) {
 179       break;
 180     }
 181
 182     uint8_t *frame = (got+i+9);
 183
 184         // Break and stick with current result if buffer was not completely full
 185         if (frame[0] == 0x44 && frame[1] == 0x44 && frame[2] == 0x44 && frame[3] == 0x44) break;
 186
 187     char line[1000] = "";
 188     int j;
 189     for(j = 0; j < len; j++) {
 190       sprintf(line+(j*3), "%02x  ", frame[j]);
 191     }
 192
 193     char *crc;
 194     if(len > 2) {
 195       uint8_t b1, b2;
 196       ComputeCrc14443(CRC_14443_B, frame, len-2, &b1, &b2);
 197       if(b1 != frame[len-2] || b2 != frame[len-1]) {
 198         crc = "**FAIL CRC**";
 199       } else {
 200         crc = "";
 201       }
 202     } else {
 203       crc = "(SHORT)";
 204     }
 205
 206     char metricString[100];
 207     if(isResponse) {
 208       sprintf(metricString, "%3d", metric);
 209     } else {
 210       strcpy(metricString, "   ");
 211     }
 212
 213     PrintAndLog(" +%7d: %s: %s %s %s",
 214       (prev < 0 ? 0 : timestamp - prev),
 215       metricString,
 216       (isResponse ? "TAG" : "   "), line, crc);
 217
 218     prev = timestamp;
 219     i += (len + 9);
 220   }
 221   return 0;
 222 }
 223
 224 int CmdHF14BRead(const char *Cmd)
 225 {
 226   UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_14443, {strtol(Cmd, NULL, 0), 0, 0}};
 227   SendCommand(&c);
 228   return 0;
 229 }
 230
 231 int CmdHF14Sim(const char *Cmd)
 232 {
 233   UsbCommand c={CMD_SIMULATE_TAG_ISO_14443};
 234   SendCommand(&c);
 235   return 0;
 236 }
 237
 238 int CmdHFSimlisten(const char *Cmd)
 239 {
 240   UsbCommand c = {CMD_SIMULATE_TAG_HF_LISTEN};
 241   SendCommand(&c);
 242   return 0;
 243 }
 244
 245 int CmdHF14BSnoop(const char *Cmd)
 246 {
 247   UsbCommand c = {CMD_SNOOP_ISO_14443};
 248   SendCommand(&c);
 249   return 0;
 250 }
 251
 252 /* New command to read the contents of a SRI512 tag
 253  * SRI512 tags are ISO14443-B modulated memory tags,
 254  * this command just dumps the contents of the memory
 255  */
 256 int CmdSri512Read(const char *Cmd)
 257 {
 258   UsbCommand c = {CMD_READ_SRI512_TAG, {strtol(Cmd, NULL, 0), 0, 0}};
 259   SendCommand(&c);
 260   return 0;
 261 }
 262
 263 /* New command to read the contents of a SRIX4K tag
 264  * SRIX4K tags are ISO14443-B modulated memory tags,
 265  * this command just dumps the contents of the memory/
 266  */
 267 int CmdSrix4kRead(const char *Cmd)
 268 {
 269   UsbCommand c = {CMD_READ_SRIX4K_TAG, {strtol(Cmd, NULL, 0), 0, 0}};
 270   SendCommand(&c);
 271   return 0;
 272 }
 273
 274 int CmdHF14BCmdRaw (const char *cmd) {
 275     UsbCommand resp;
 276     uint8_t *recv;
 277     UsbCommand c = {CMD_ISO_14443B_COMMAND, {0, 0, 0}}; // len,recv?
 278     uint8_t reply=1;
 279     uint8_t crc=0;
 280     uint8_t power=0;
 281     char buf[5]="";
 282     int i=0;
 283     uint8_t data[100];
 284     unsigned int datalen=0, temp;
 285     char *hexout;
 286
 287     if (strlen(cmd)<3) {
 288         PrintAndLog("Usage: hf 14b raw [-r] [-c] [-p] <0A 0B 0C ... hex>");
 289         PrintAndLog("       -r    do not read response");
 290         PrintAndLog("       -c    calculate and append CRC");
 291         PrintAndLog("       -p    leave the field on after receive");
 292         return 0;
 293     }
 294
 295     // strip
 296     while (*cmd==' ' || *cmd=='\t') cmd++;
 297
 298     while (cmd[i]!='\0') {
 299         if (cmd[i]==' ' || cmd[i]=='\t') { i++; continue; }
 300         if (cmd[i]=='-') {
 301             switch (cmd[i+1]) {
 302                 case 'r':
 303                 case 'R':
 304                     reply=0;
 305                     break;
 306                 case 'c':
 307                 case 'C':
 308                     crc=1;
 309                     break;
 310                 case 'p':
 311                 case 'P':
 312                     power=1;
 313                     break;
 314                 default:
 315                     PrintAndLog("Invalid option");
 316                     return 0;
 317             }
 318             i+=2;
 319             continue;
 320         }
 321         if ((cmd[i]>='0' && cmd[i]<='9') ||
 322             (cmd[i]>='a' && cmd[i]<='f') ||
 323             (cmd[i]>='A' && cmd[i]<='F') ) {
 324             buf[strlen(buf)+1]=0;
 325             buf[strlen(buf)]=cmd[i];
 326             i++;
 327
 328             if (strlen(buf)>=2) {
 329                 sscanf(buf,"%x",&temp);
 330                 data[datalen]=(uint8_t)(temp & 0xff);
 331                 datalen++;
 332                 *buf=0;
 333             }
 334             continue;
 335         }
 336         PrintAndLog("Invalid char on input");
 337         return 0;
 338     }
 339     if (datalen == 0)
 340     {
 341       PrintAndLog("Missing data input");
 342       return 0;
 343     }
 344     if(crc)
 345     {
 346         uint8_t first, second;
 347         ComputeCrc14443(CRC_14443_B, data, datalen, &first, &second);
 348         data[datalen++] = first;
 349         data[datalen++] = second;
 350     }
 351
 352     c.arg[0] = datalen;
 353     c.arg[1] = reply;
 354     c.arg[2] = power;
 355     memcpy(c.d.asBytes,data,datalen);
 356
 357     SendCommand(&c);
 358
 359     if (reply) {
 360         if (WaitForResponseTimeout(CMD_ACK,&resp,1000)) {
 361             recv = resp.d.asBytes;
 362             PrintAndLog("received %i octets",resp.arg[0]);
 363             if(!resp.arg[0])
 364                 return 0;
 365             hexout = (char *)malloc(resp.arg[0] * 3 + 1);
 366             if (hexout != NULL) {
 367                 uint8_t first, second;
 368                 for (int i = 0; i < resp.arg[0]; i++) { // data in hex
 369                     sprintf(&hexout[i * 3], "%02X ", recv[i]);
 370                 }
 371                 PrintAndLog("%s", hexout);
 372                 free(hexout);
 373                 ComputeCrc14443(CRC_14443_B, recv, resp.arg[0]-2, &first, &second);
 374                 if(recv[resp.arg[0]-2]==first && recv[resp.arg[0]-1]==second) {
 375                     PrintAndLog("CRC OK");
 376                 } else {
 377                     PrintAndLog("CRC failed");
 378                 }
 379             } else {
 380                 PrintAndLog("malloc failed your client has low memory?");
 381             }
 382         } else {
 383             PrintAndLog("timeout while waiting for reply.");
 384         }
 385     } // if reply
 386     return 0;
 387 }
 388
 389 int CmdHF14BWrite( const char *Cmd){
 390
 391 /*
 392  * For SRIX4K  blocks 00 - 7F
 393  * hf 14b raw -c -p 09 $srix4kwblock $srix4kwdata
 394  *
 395  * For SR512  blocks 00 - 0F
 396  * hf 14b raw -c -p 09 $sr512wblock $sr512wdata
 397  *
 398  * Special block FF =  otp_lock_reg block.
 399  * Data len 4 bytes-
 400  */
 401         char cmdp = param_getchar(Cmd, 0);
 402         uint8_t blockno = -1;
 403         uint8_t data[4] = {0x00};
 404         bool isSrix4k = true;
 405         char str[20];
 406
 407         if (cmdp == 'h' || cmdp == 'H') {
 408                 PrintAndLog("Usage:  hf 14b write <1|2> <BLOCK> <DATA>");
 409                 PrintAndLog("");
 410                 PrintAndLog("     sample: hf 14b write 1 127 11223344");
 411                 PrintAndLog("     sample: hf 14b write 1 255 11223344");
 412                 PrintAndLog("     sample: hf 14b write 2 15 11223344");
 413                 PrintAndLog("     sample: hf 14b write 2 255 11223344");
 414                 return 0;
 415         }
 416
 417         if ( param_getchar(Cmd, 0) == '2' )
 418                 isSrix4k = false;
 419
 420         blockno = param_get8(Cmd, 1);
 421
 422         if ( isSrix4k ){
 423                 if ( blockno > 0x7f && blockno != 0xff ){
 424                         PrintAndLog("Block number out of range");
 425                         return 0;
 426                 }
 427         } else {
 428                 if ( blockno > 0x0f && blockno != 0xff ){
 429                         PrintAndLog("Block number out of range");
 430                         return 0;
 431                 }
 432         }
 433
 434         if (param_gethex(Cmd, 2, data, 8)) {
 435                 PrintAndLog("Data must include 8 HEX symbols");
 436                 return 0;
 437         }
 438
 439         if ( blockno == 0xff)
 440                 PrintAndLog("Writing to special block %02X [ %s]", blockno,  sprint_hex(data,4) );
 441         else
 442                 PrintAndLog("Writing to block %02X [ %s]", blockno,  sprint_hex(data,4) );
 443
 444         sprintf(str, "-c -p 09 %02x %02x%02x%02x%02x", blockno, data[0], data[1], data[2], data[3]);
 445         CmdHF14BCmdRaw(str);
 446         return 0;
 447 }
 448
 449 static command_t CommandTable[] =
 450 {
 451   {"help",        CmdHelp,        1, "This help"},
 452   {"demod",       CmdHF14BDemod,  1, "Demodulate ISO14443 Type B from tag"},
 453   {"list",        CmdHF14BList,   0, "List ISO 14443 history"},
 454   {"read",        CmdHF14BRead,   0, "Read HF tag (ISO 14443)"},
 455   {"sim",         CmdHF14Sim,     0, "Fake ISO 14443 tag"},
 456   {"simlisten",   CmdHFSimlisten, 0, "Get HF samples as fake tag"},
 457   {"snoop",       CmdHF14BSnoop,  0, "Eavesdrop ISO 14443"},
 458   {"sri512read",  CmdSri512Read,  0, "Read contents of a SRI512 tag"},
 459   {"srix4kread",  CmdSrix4kRead,  0, "Read contents of a SRIX4K tag"},
 460   {"raw",         CmdHF14BCmdRaw, 0, "Send raw hex data to tag"},
 461   {"write",       CmdHF14BWrite,  0, "Write data to a SRI512 | SRIX4K tag"},
 462   {NULL, NULL, 0, NULL}
 463 };
 464
 465 int CmdHF14B(const char *Cmd)
 466 {
 467   CmdsParse(CommandTable, Cmd);
 468   return 0;
 469 }
 470
 471 int CmdHelp(const char *Cmd)
 472 {
 473   CmdsHelp(CommandTable);
 474   return 0;
 475 }