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 int getFDXBits(uint64_t national_id, uint16_t country, uint8_t isanimal, uint8_t isextended, uint32_t extended, uint8_t *bits) {
  76
  77     // add preamble ten 0x00 and one 0x01
  78     memset(bits, 0x00, 10);
  79         bits[10] = 1;
  80
  81         // 128bits
  82     // every 9th bit is 0x01, but we can just fill the rest with 0x01 and overwrite
  83         memset(bits, 0x01, 128);
  84
  85     // add preamble ten 0x00 and one 0x01
  86     memset(bits, 0x00, 10);
  87
  88         // add reserved
  89         num_to_bytebitsLSBF(0x00, 7, bits + 66);
  90         num_to_bytebitsLSBF(0x00 >> 7, 7, bits + 74);
  91
  92         // add animal flag - OK
  93         bits[65] = isanimal;
  94
  95         // add extended flag - OK
  96         bits[81] = isextended;
  97
  98         // add national code 40bits - OK
  99         num_to_bytebitsLSBF(national_id >> 0, 8, bits+11);
 100         num_to_bytebitsLSBF(national_id >> 8, 8, bits+20);
 101         num_to_bytebitsLSBF(national_id >> 16, 8, bits+29);
 102         num_to_bytebitsLSBF(national_id >> 24, 8, bits+38);
 103         num_to_bytebitsLSBF(national_id >> 32, 6, bits+47);
 104
 105         // add country code - OK
 106         num_to_bytebitsLSBF(country >> 0, 2, bits+53);
 107         num_to_bytebitsLSBF(country >> 2, 8, bits+56);
 108
 109         // add crc-16 - OK
 110         uint8_t raw[8];
 111         for (uint8_t i=0; i<8; ++i)
 112                 raw[i] = bytebits_to_byte(bits + 11 + i * 9, 8);
 113
 114         uint16_t crc = crc16_ccitt_kermit(raw, 8);
 115         num_to_bytebitsLSBF(crc >> 0, 8, bits+83);
 116         num_to_bytebitsLSBF(crc >> 8, 8, bits+92);
 117
 118         // extended data - OK
 119         num_to_bytebitsLSBF( extended >> 0 , 8, bits+101);
 120         num_to_bytebitsLSBF( extended >> 8 , 8, bits+110);
 121         num_to_bytebitsLSBF( extended >> 16, 8, bits+119);
 122         return 1;
 123 }
 124
 125 //see ASKDemod for what args are accepted
 126 //almost the same demod as cmddata.c/CmdFDXBdemodBI
 127 int CmdFdxDemod(const char *Cmd) {
 128
 129         //Differential Biphase / di-phase (inverted biphase)
 130         //get binary from ask wave
 131         if (!ASKbiphaseDemod("0 32 1 0", FALSE)) {
 132                 if (g_debugMode) PrintAndLog("DEBUG: Error - FDX-B ASKbiphaseDemod failed");
 133                 return 0;
 134         }
 135         size_t size = DemodBufferLen;
 136         int ans = FDXBdemodBI(DemodBuffer, &size);
 137         if (ans < 0){
 138                 if (g_debugMode){
 139                         if (ans == -1)
 140                                 PrintAndLog("DEBUG: Error - FDX-B too few bits found");
 141                         else if (ans == -2)
 142                                 PrintAndLog("DEBUG: Error - FDX-B preamble not found");
 143                         else if (ans == -3)
 144                                 PrintAndLog("DEBUG: Error - FDX-B Size not correct: %d", size);
 145                         else
 146                                 PrintAndLog("DEBUG: Error - FDX-B ans: %d", ans);
 147                 }
 148                 return 0;
 149         }
 150
 151         setDemodBuf(DemodBuffer, 128, ans);
 152         // remove marker bits (1's every 9th digit after preamble) (pType = 2)
 153         size = removeParity(DemodBuffer, 11, 9, 2, 117);
 154         if ( size != 104 ) {
 155                 if (g_debugMode) PrintAndLog("DEBUG: Error - FDX-B error removeParity: %d", size);
 156                 return 0;
 157         }
 158
 159         //got a good demod
 160         uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(DemodBuffer+32,6)) << 32) | bytebits_to_byteLSBF(DemodBuffer,32);
 161         uint16_t countryCode = bytebits_to_byteLSBF(DemodBuffer+38,10);
 162         uint8_t dataBlockBit = DemodBuffer[48];
 163         uint32_t reservedCode = bytebits_to_byteLSBF(DemodBuffer+49,14);
 164         uint8_t animalBit = DemodBuffer[63];
 165         uint32_t crc16 = bytebits_to_byteLSBF(DemodBuffer+64,16);
 166         uint32_t extended = bytebits_to_byteLSBF(DemodBuffer+80,24);
 167         uint64_t rawid = ((uint64_t)
 168                                                                 //bytebits_to_byte(DemodBuffer, 8) << 96) |
 169                                                                 //bytebits_to_byte(DemodBuffer,32) << 64) |
 170                                                                 bytebits_to_byte(DemodBuffer,32) << 32) |
 171                                                                 bytebits_to_byte(DemodBuffer+32, 32);
 172         uint8_t raw[8];
 173         num_to_bytes(rawid, 8, raw);
 174
 175         uint16_t calcCrc = crc16_ccitt_kermit(raw, 8);
 176
 177         PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:  Raw : %s", sprint_hex(raw, 8));
 178         PrintAndLog("Animal ID          %04u-%012llu", countryCode, NationalCode);
 179         PrintAndLog("National Code      %012llu (0x%llX)", NationalCode, NationalCode);
 180         PrintAndLog("Country Code       %04u", countryCode);
 181         PrintAndLog("Reserved/RFU       %u (0x04%X)", reservedCode,  reservedCode);
 182         PrintAndLog("");
 183         PrintAndLog("Animal Tag         %s", animalBit ? "True" : "False");
 184         PrintAndLog("Has extended data  %s [0x%X]", dataBlockBit ? "True" : "False", extended);
 185         PrintAndLog("CRC-16             0x%04X - 0x%04X [%s]", crc16, calcCrc, (calcCrc == crc16) ? "Ok" : "Failed");
 186
 187         if (g_debugMode) {
 188                 PrintAndLog("Start marker %d;   Size %d", ans, size);
 189                 char *bin = sprint_bin_break(DemodBuffer, size, 16);
 190                 PrintAndLog("DEBUG bin stream:\n%s", bin);
 191         }
 192         return 1;
 193 }
 194
 195 int CmdFdxRead(const char *Cmd) {
 196         CmdLFRead("s");
 197         getSamples("12000", TRUE);
 198         return CmdFdxDemod(Cmd);
 199 }
 200
 201 int CmdFdxClone(const char *Cmd) {
 202
 203         uint32_t countryid = 0;
 204         uint64_t animalid = 0;
 205         uint32_t blocks[5] = {T55x7_MODULATION_DIPHASE | T55x7_BITRATE_RF_32 | 4 << T55x7_MAXBLOCK_SHIFT, 0, 0, 0, 0};
 206         uint8_t bits[128];
 207         uint8_t *bs = bits;
 208         memset(bs, 0, sizeof(bits));
 209
 210         char cmdp = param_getchar(Cmd, 0);
 211         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_fdx_clone();
 212
 213         countryid = param_get32ex(Cmd, 0, 0, 10);
 214         animalid = param_get64ex(Cmd, 1, 0, 10);
 215
 216         //Q5
 217         if (param_getchar(Cmd, 2) == 'Q' || param_getchar(Cmd, 2) == 'q') {
 218                 //t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
 219                 blocks[0] = T5555_MODULATION_BIPHASE | T5555_INVERT_OUTPUT | ((32-2)>>1) << T5555_BITRATE_SHIFT | 4 << T5555_MAXBLOCK_SHIFT;
 220         }
 221
 222         verify_values(countryid, animalid);
 223
 224         // getFDXBits(uint64_t national_id, uint16_t country, uint8_t isanimal, uint8_t isextended, uint32_t extended, uint8_t *bits)
 225         if ( !getFDXBits(animalid, countryid, 1, 0, 0, bs)) {
 226                 PrintAndLog("Error with tag bitstream generation.");
 227                 return 1;
 228         }
 229
 230         // convert from bit stream to block data
 231         blocks[1] = bytebits_to_byte(bs,32);
 232         blocks[2] = bytebits_to_byte(bs+32,32);
 233         blocks[3] = bytebits_to_byte(bs+64,32);
 234         blocks[4] = bytebits_to_byte(bs+96,32);
 235
 236         PrintAndLog("Preparing to clone FDX-B to T55x7 with animal ID: %04u-%"PRIu64, countryid, animalid);
 237         PrintAndLog("Blk | Data ");
 238         PrintAndLog("----+------------");
 239         PrintAndLog(" 00 | 0x%08x", blocks[0]);
 240         PrintAndLog(" 01 | 0x%08x", blocks[1]);
 241         PrintAndLog(" 02 | 0x%08x", blocks[2]);
 242         PrintAndLog(" 03 | 0x%08x", blocks[3]);
 243         PrintAndLog(" 04 | 0x%08x", blocks[4]);
 244
 245         UsbCommand resp;
 246         UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
 247
 248         for (int i = 4; i >= 0; --i) {
 249                 c.arg[0] = blocks[i];
 250                 c.arg[1] = i;
 251                 clearCommandBuffer();
 252                 SendCommand(&c);
 253                 if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)){
 254                         PrintAndLog("Error occurred, device did not respond during write operation.");
 255                         return -1;
 256                 }
 257         }
 258     return 0;
 259 }
 260
 261 int CmdFdxSim(const char *Cmd) {
 262         uint32_t countryid = 0;
 263         uint64_t animalid = 0;
 264
 265         char cmdp = param_getchar(Cmd, 0);
 266         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_fdx_sim();
 267
 268         countryid = param_get32ex(Cmd, 0, 0, 10);
 269         animalid = param_get64ex(Cmd, 1, 0, 10);
 270
 271         verify_values(countryid, animalid);
 272
 273         uint8_t clk = 32, encoding = 2, separator = 0, invert = 1;
 274         uint16_t arg1, arg2;
 275         size_t size = 128;
 276         arg1 = clk << 8 | encoding;
 277         arg2 = invert << 8 | separator;
 278
 279         PrintAndLog("Simulating FDX-B animal ID: %04u-%"PRIu64, countryid, animalid);
 280
 281         UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
 282
 283          //getFDXBits(uint64_t national_id, uint16_t country, uint8_t isanimal, uint8_t isextended, uint32_t extended, uint8_t *bits)
 284         getFDXBits(animalid, countryid, 1, 0, 0, c.d.asBytes);
 285         clearCommandBuffer();
 286         SendCommand(&c);
 287         return 0;
 288 }
 289
 290 static command_t CommandTable[] = {
 291     {"help",    CmdHelp,        1, "This help"},
 292         {"demod",       CmdFdxDemod,1, "Attempt extract tag data from graphbuf"},
 293         {"read",        CmdFdxRead,     0, "Attempt to read and extract tag data"},
 294         {"clone",       CmdFdxClone,0, "Clone animal ID tag to T55x7"},
 295         {"sim",         CmdFdxSim,      0, "Animal ID tag simulator"},
 296     {NULL, NULL, 0, NULL}
 297 };
 298
 299 int CmdLFFdx(const char *Cmd) {
 300         clearCommandBuffer();
 301     CmdsParse(CommandTable, Cmd);
 302     return 0;
 303 }
 304
 305 int CmdHelp(const char *Cmd) {
 306     CmdsHelp(CommandTable);
 307     return 0;
 308 }