cvs.zerfleddert.de Git - proxmark3-svn/blob - client/cmdlffdx.c

   1 //-----------------------------------------------------------------------------
   2 //
   3 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   4 // at your option, any later version. See the LICENSE.txt file for the text of
   5 // the license.
   6 //-----------------------------------------------------------------------------
   7 // Low frequency Presco tag commands
   8 //-----------------------------------------------------------------------------
   9
  10 #include "cmdlffdx.h"
  11
  12 /*
  13         FDX-B ISO11784/85 demod  (aka animal tag)  BIPHASE, inverted, rf/32,  with preamble of 00000000001 (128bits)
  14         8 databits + 1 parity (1)
  15         CIITT 16 checksum
  16         NATIONAL CODE, ICAR database
  17         COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf
  18         FLAG (animal/non-animal)
  19
  20         38 IDbits
  21         10 country code
  22         1 extra app bit
  23         14 reserved bits
  24         1 animal bit
  25         16 ccitt CRC chksum over 64bit ID CODE.
  26         24 appli bits.
  27
  28         sample: 985121004515220  [ 37FF65B88EF94 ]
  29 */
  30
  31 static int CmdHelp(const char *Cmd);
  32
  33 int usage_lf_fdx_clone(void){
  34         PrintAndLog("clone a FDX-B Animal tag to a T55x7 tag.");
  35         PrintAndLog("Usage: lf fdx clone [h] <country id> <animal id> <Q5>");
  36         PrintAndLog("Options:");
  37         PrintAndLog("      h            : This help");
  38         PrintAndLog("      <country id> : Country id");
  39         PrintAndLog("      <animal id>  : Animal id");
  40         // has extended data?
  41         //reserved/rfu
  42         //is animal tag
  43         // extended data
  44         PrintAndLog("      <Q5>        : specify write to Q5 (t5555 instead of t55x7)");
  45         PrintAndLog("");
  46         PrintAndLog("Sample: lf fdx clone 999 112233");
  47         return 0;
  48 }
  49
  50 int usage_lf_fdx_sim(void) {
  51         PrintAndLog("Enables simulation of FDX-B Animal tag");
  52         PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
  53         PrintAndLog("");
  54         PrintAndLog("Usage:  lf fdx sim [h] <country id> <animal id>");
  55         PrintAndLog("Options:");
  56         PrintAndLog("      h            : This help");
  57         PrintAndLog("      <country id> : Country id");
  58         PrintAndLog("      <animal id>  : Animal id");
  59         PrintAndLog("");
  60         PrintAndLog("Sample: lf fdx sim 999 112233");
  61         return 0;
  62 }
  63 // clearing the topbit needed for the preambl detection.
  64 static void verify_values(uint32_t countryid, uint64_t animalid){
  65         if ((animalid & 0x3FFFFFFFFF) != animalid) {
  66                 animalid &= 0x3FFFFFFFFF;
  67                 PrintAndLog("Animal ID Truncated to 38bits: %"PRIx64, animalid);
  68         }
  69         if ( (countryid & 0x3ff) != countryid ) {
  70                 countryid &= 0x3ff;
  71                 PrintAndLog("Country ID Truncated to 10bits: %03d", countryid);
  72         }
  73 }
  74
  75 static uint16_t getFDXchksum (uint64_t raw){
  76         uint8_t arr[8];
  77         num_to_bytes(raw, 64, arr);
  78         return crc16_ccitt_kermit(arr, 8);
  79 }
  80
  81 int getFDXBits(uint64_t national_id, uint16_t country, uint8_t isanimal, uint8_t isextended, uint32_t extended, uint8_t *bits) {
  82
  83     // add preamble ten 0x00 and one 0x01
  84     memset(bits, 0x00, 10);
  85         bits[10] = 1;
  86
  87         // 128bits
  88     // every 9th bit is 0x01, but we can just fill the rest with 0x01 and overwrite
  89         memset(bits, 0x01, 128);
  90
  91     // add preamble ten 0x00 and one 0x01
  92     memset(bits, 0x00, 10);
  93
  94         // add reserved
  95         num_to_bytebitsLSBF(0x00, 7, bits + 66);
  96         num_to_bytebitsLSBF(0x00 >> 7, 7, bits + 74);
  97
  98         // add animal flag - OK
  99         bits[65] = isanimal;
 100
 101         // add extended flag - OK
 102         bits[81] = isextended;
 103
 104         // add national code 40bits - OK
 105         num_to_bytebitsLSBF(national_id >> 0, 8, bits+11);
 106         num_to_bytebitsLSBF(national_id >> 8, 8, bits+20);
 107         num_to_bytebitsLSBF(national_id >> 16, 8, bits+29);
 108         num_to_bytebitsLSBF(national_id >> 24, 8, bits+38);
 109         num_to_bytebitsLSBF(national_id >> 32, 6, bits+47);
 110
 111         // add country code - OK
 112         num_to_bytebitsLSBF(country >> 0, 2, bits+53);
 113         num_to_bytebitsLSBF(country >> 2, 8, bits+56);
 114
 115         // add crc-16 - OK
 116         uint8_t raw[8];
 117         for (uint8_t i=0; i<8; ++i)
 118                 raw[i] = bytebits_to_byte(bits + 11 + i * 9, 8);
 119
 120         crc = crc16_ccitt_kermit(raw, 8);
 121         num_to_bytebitsLSBF(crc >> 0, 8, bits+83);
 122         num_to_bytebitsLSBF(crc >> 8, 8, bits+92);
 123
 124         // extended data - OK
 125         num_to_bytebitsLSBF( extended >> 0 , 8, bits+101);
 126         num_to_bytebitsLSBF( extended >> 8 , 8, bits+110);
 127         num_to_bytebitsLSBF( extended >> 16, 8, bits+119);
 128         return 1;
 129 }
 130
 131 //see ASKDemod for what args are accepted
 132 //almost the same demod as cmddata.c/CmdFDXBdemodBI
 133 int CmdFdxDemod(const char *Cmd) {
 134
 135         //Differential Biphase / di-phase (inverted biphase)
 136         //get binary from ask wave
 137         if (!ASKbiphaseDemod("0 32 1 0", FALSE)) {
 138                 if (g_debugMode) PrintAndLog("DEBUG: Error - FDX-B ASKbiphaseDemod failed");
 139                 return 0;
 140         }
 141         size_t size = DemodBufferLen;
 142         int ans = FDXBdemodBI(DemodBuffer, &size);
 143         if (ans < 0){
 144                 if (g_debugMode){
 145                         if (ans == -1)
 146                                 PrintAndLog("DEBUG: Error - FDX-B too few bits found");
 147                         else if (ans == -2)
 148                                 PrintAndLog("DEBUG: Error - FDX-B preamble not found");
 149                         else if (ans == -3)
 150                                 PrintAndLog("DEBUG: Error - FDX-B Size not correct: %d", size);
 151                         else
 152                                 PrintAndLog("DEBUG: Error - FDX-B ans: %d", ans);
 153                 }
 154                 return 0;
 155         }
 156
 157         setDemodBuf(DemodBuffer, 128, ans);
 158         // remove marker bits (1's every 9th digit after preamble) (pType = 2)
 159         size = removeParity(DemodBuffer, 11, 9, 2, 117);
 160         if ( size != 104 ) {
 161                 if (g_debugMode) PrintAndLog("DEBUG: Error - FDX-B error removeParity: %d", size);
 162                 return 0;
 163         }
 164
 165         //got a good demod
 166         uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(DemodBuffer+32,6)) << 32) | bytebits_to_byteLSBF(DemodBuffer,32);
 167         uint16_t countryCode = bytebits_to_byteLSBF(DemodBuffer+38,10);
 168         uint8_t dataBlockBit = DemodBuffer[48];
 169         uint32_t reservedCode = bytebits_to_byteLSBF(DemodBuffer+49,14);
 170         uint8_t animalBit = DemodBuffer[63];
 171         uint32_t crc16 = bytebits_to_byteLSBF(DemodBuffer+64,16);
 172         uint32_t extended = bytebits_to_byteLSBF(DemodBuffer+80,24);
 173         uint64_t rawid = ((uint64_t)
 174                                                                 //bytebits_to_byte(DemodBuffer, 8) << 96) |
 175                                                                 //bytebits_to_byte(DemodBuffer,32) << 64) |
 176                                                                 bytebits_to_byte(DemodBuffer,32) << 32) |
 177                                                                 bytebits_to_byte(DemodBuffer+32, 32);
 178         uint8_t raw[8];
 179         num_to_bytes(rawid, 8, raw);
 180
 181         uint16_t calcCrc = crc16_ccitt_kermit(raw, 8);
 182
 183         PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:  Raw : %s", sprint_hex(raw, 8));
 184         PrintAndLog("Animal ID          %04u-%012llu", countryCode, NationalCode);
 185         PrintAndLog("National Code      %012llu (0x%llX)", NationalCode, NationalCode);
 186         PrintAndLog("Country Code       %04u", countryCode);
 187         PrintAndLog("Reserved/RFU       %u (0x04%X)", reservedCode,  reservedCode);
 188         PrintAndLog("");
 189         PrintAndLog("Animal Tag         %s", animalBit ? "True" : "False");
 190         PrintAndLog("Has extended data  %s [0x%X]", dataBlockBit ? "True" : "False", extended);
 191         PrintAndLog("CRC-16             0x%04X - 0x%04X [%s]", crc16, calcCrc, (calcCrc == crc16) ? "Ok" : "Failed");
 192
 193         if (g_debugMode) {
 194                 PrintAndLog("Start marker %d;   Size %d", ans, size);
 195                 char *bin = sprint_bin_break(DemodBuffer, size, 16);
 196                 PrintAndLog("DEBUG bin stream:\n%s", bin);
 197         }
 198         return 1;
 199 }
 200
 201 int CmdFdxRead(const char *Cmd) {
 202         CmdLFRead("s");
 203         getSamples("12000", TRUE);
 204         return CmdFdxDemod(Cmd);
 205 }
 206
 207 int CmdFdxClone(const char *Cmd) {
 208
 209         uint32_t countryid = 0;
 210         uint64_t animalid = 0;
 211         uint32_t blocks[5] = {T55x7_MODULATION_DIPHASE | T55x7_BITRATE_RF_32 | 4<<T55x7_MAXBLOCK_SHIFT, 0, 0, 0, 0};
 212         uint8_t bits[128];
 213         uint8_t *bs = bits;
 214         memset(bs, 0, sizeof(bits));
 215
 216         char cmdp = param_getchar(Cmd, 0);
 217         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_fdx_clone();
 218
 219         countryid = param_get32ex(Cmd, 0, 0, 10);
 220         animalid = param_get64ex(Cmd, 1, 0, 10);
 221
 222         //Q5
 223         if (param_getchar(Cmd, 1) == 'Q' || param_getchar(Cmd, 1) == 'q') {
 224                 //t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
 225                 blocks[0] = T5555_MODULATION_BIPHASE | T5555_INVERT_OUTPUT | 32<<T5555_BITRATE_SHIFT | 4<<T5555_MAXBLOCK_SHIFT;
 226         }
 227
 228         verify_values(countryid, animalid);
 229
 230         // getFDXBits(uint64_t national_id, uint16_t country, uint8_t isanimal, uint8_t isextended, uint32_t extended, uint8_t *bits)
 231         if ( !getFDXBits(animalid, countryid, 1, 0, 0, bs)) {
 232                 PrintAndLog("Error with tag bitstream generation.");
 233                 return 1;
 234         }
 235
 236         // convert from bit stream to block data
 237         blocks[1] = bytebits_to_byte(bs,32);
 238         blocks[2] = bytebits_to_byte(bs+32,32);
 239         blocks[3] = bytebits_to_byte(bs+64,32);
 240         blocks[4] = bytebits_to_byte(bs+96,32);
 241
 242         PrintAndLog("Preparing to clone FDX-B to T55x7 with animal ID: %04u-%"PRIu64, countryid, animalid);
 243         PrintAndLog("Blk | Data ");
 244         PrintAndLog("----+------------");
 245         PrintAndLog(" 00 | 0x%08x", blocks[0]);
 246         PrintAndLog(" 01 | 0x%08x", blocks[1]);
 247         PrintAndLog(" 02 | 0x%08x", blocks[2]);
 248         PrintAndLog(" 03 | 0x%08x", blocks[3]);
 249         PrintAndLog(" 04 | 0x%08x", blocks[4]);
 250
 251         UsbCommand resp;
 252         UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
 253
 254         for (int i = 4; i >= 0; --i) {
 255                 c.arg[0] = blocks[i];
 256                 c.arg[1] = i;
 257                 clearCommandBuffer();
 258                 SendCommand(&c);
 259                 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
 260                         PrintAndLog("Error occurred, device did not respond during write operation.");
 261                         return -1;
 262                 }
 263         }
 264     return 0;
 265 }
 266
 267 int CmdFdxSim(const char *Cmd) {
 268         uint32_t countryid = 0;
 269         uint64_t animalid = 0;
 270
 271         char cmdp = param_getchar(Cmd, 0);
 272         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_fdx_sim();
 273
 274         countryid = param_get32ex(Cmd, 0, 0, 10);
 275         animalid = param_get64ex(Cmd, 1, 0, 10);
 276
 277         verify_values(countryid, animalid);
 278
 279         uint8_t clk = 32, encoding = 2, separator = 0, invert = 1;
 280         uint16_t arg1, arg2;
 281         size_t size = 128;
 282         arg1 = clk << 8 | encoding;
 283         arg2 = invert << 8 | separator;
 284
 285         PrintAndLog("Simulating FDX-B animal ID: %04u-%"PRIu64, countryid, animalid);
 286
 287         UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
 288
 289          //getFDXBits(uint64_t national_id, uint16_t country, uint8_t isanimal, uint8_t isextended, uint32_t extended, uint8_t *bits)
 290         getFDXBits(animalid, countryid, 1, 0, 0, c.d.asBytes);
 291         clearCommandBuffer();
 292         SendCommand(&c);
 293         return 0;
 294 }
 295
 296 static command_t CommandTable[] = {
 297     {"help",    CmdHelp,        1, "This help"},
 298         {"demod",       CmdFdxDemod,1, "Attempt extract tag data from graphbuf"},
 299         {"read",        CmdFdxRead,     0, "Attempt to read and extract tag data"},
 300         {"clone",       CmdFdxClone,0, "Clone animal ID tag to T55x7"},
 301         {"sim",         CmdFdxSim,      0, "Animal ID tag simulator"},
 302     {NULL, NULL, 0, NULL}
 303 };
 304
 305 int CmdLFFdx(const char *Cmd) {
 306         clearCommandBuffer();
 307     CmdsParse(CommandTable, Cmd);
 308     return 0;
 309 }
 310
 311 int CmdHelp(const char *Cmd) {
 312     CmdsHelp(CommandTable);
 313     return 0;
 314 }