git.zerfleddert.de Git - proxmark3-svn/blob - client/cmdlfjablotron.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 jablotron tag commands
   8 // Differential Biphase, RF/64, 64 bits long (complete)
   9 //-----------------------------------------------------------------------------
  10
  11 #include "cmdlfjablotron.h"
  12
  13 #include <string.h>
  14 #include <inttypes.h>
  15 #include <stdbool.h>
  16 #include "comms.h"
  17 #include "ui.h"
  18 #include "util.h"
  19 #include "graph.h"
  20 #include "cmdparser.h"
  21 #include "cmddata.h"
  22 #include "cmdmain.h"
  23 #include "cmdlf.h"
  24 #include "protocols.h"  // for T55xx config register definitions
  25 #include "lfdemod.h"    // parityTest
  26
  27 static int CmdHelp(const char *Cmd);
  28
  29 int usage_lf_jablotron_clone(void) {
  30         PrintAndLog("clone a Jablotron tag to a T55x7 tag.");
  31         PrintAndLog("Usage: lf jablotron clone [h] <card ID> <Q5>");
  32         PrintAndLog("Options:");
  33         PrintAndLog("      h          : This help");
  34         PrintAndLog("      <card ID>  : jablotron card ID");
  35         PrintAndLog("      <Q5>       : specify write to Q5 (t5555 instead of t55x7)");
  36         PrintAndLog("");
  37         PrintAndLog("Sample: lf jablotron clone 112233");
  38         return 0;
  39 }
  40
  41 int usage_lf_jablotron_sim(void) {
  42         PrintAndLog("Enables simulation of jablotron card with specified card number.");
  43         PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
  44         PrintAndLog("");
  45         PrintAndLog("Usage:  lf jablotron sim [h] <card ID>");
  46         PrintAndLog("Options:");
  47         PrintAndLog("      h          : This help");
  48         PrintAndLog("      <card ID>  : jablotron card ID");
  49         PrintAndLog("");
  50         PrintAndLog("Sample: lf jablotron sim 112233");
  51         return 0;
  52 }
  53
  54 static uint8_t jablontron_chksum(uint8_t *bits) {
  55         uint8_t chksum = 0;
  56         for (int i=16; i < 56; i += 8) {
  57                 chksum += bytebits_to_byte(bits+i,8);
  58         }
  59         chksum ^= 0x3A;
  60         return chksum;
  61 }
  62
  63 int getJablotronBits(uint64_t fullcode, uint8_t *bits) {
  64         //preamp
  65         num_to_bytebits(0xFFFF, 16, bits);
  66
  67         //fullcode
  68         num_to_bytebits(fullcode, 40, bits+16);
  69
  70         //chksum byte
  71         uint8_t chksum = jablontron_chksum(bits);
  72         num_to_bytebits(chksum, 8, bits+56);
  73         return 1;
  74 }
  75
  76 // ASK/Diphase fc/64 (inverted Biphase)
  77 // Note: this is not a demod, this is only a detection
  78 // the parameter *bits needs to be demoded before call
  79 // 0xFFFF preamble, 64bits
  80 int JablotronDetect(uint8_t *bits, size_t *size) {
  81         if (*size < 64*2) return -1; //make sure buffer has enough data
  82         size_t startIdx = 0;
  83         uint8_t preamble[] = {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0};
  84         if (preambleSearch(bits, preamble, sizeof(preamble), size, &startIdx) == 0)
  85                 return -2; //preamble not found
  86         if (*size != 64) return -3; // wrong demoded size
  87
  88         uint8_t checkchksum = jablontron_chksum(bits+startIdx);
  89         uint8_t crc = bytebits_to_byte(bits+startIdx+56, 8);
  90         if ( checkchksum != crc ) return -5;
  91         return (int)startIdx;
  92 }
  93
  94 //see ASKDemod for what args are accepted
  95 int CmdJablotronDemod(const char *Cmd) {
  96
  97         //Differential Biphase / di-phase (inverted biphase)
  98         //get binary from ask wave
  99         if (!ASKbiphaseDemod("0 64 1 0", false)) {
 100                 if (g_debugMode) PrintAndLog("DEBUG: Error - Jablotron ASKbiphaseDemod failed");
 101                 return 0;
 102         }
 103         size_t size = DemodBufferLen;
 104         int ans = JablotronDetect(DemodBuffer, &size);
 105         if (ans < 0) {
 106                 if (g_debugMode) {
 107                         if (ans == -1)
 108                                 PrintAndLog("DEBUG: Error - Jablotron too few bits found");
 109                         else if (ans == -2)
 110                                 PrintAndLog("DEBUG: Error - Jablotron preamble not found");
 111                         else if (ans == -3)
 112                                 PrintAndLog("DEBUG: Error - Jablotron size not correct: %d", size);
 113                         else if (ans == -5)
 114                                 PrintAndLog("DEBUG: Error - Jablotron checksum failed");
 115                         else
 116                                 PrintAndLog("DEBUG: Error - Jablotron ans: %d", ans);
 117                 }
 118                 return 0;
 119         }
 120
 121         setDemodBuf(DemodBuffer, 64, ans);
 122         setClockGrid(g_DemodClock, g_DemodStartIdx + (ans*g_DemodClock));
 123
 124         //got a good demod
 125         uint32_t raw1 = bytebits_to_byte(DemodBuffer, 32);
 126         uint32_t raw2 = bytebits_to_byte(DemodBuffer+32, 32);
 127
 128         uint64_t id = (( (uint64_t)bytebits_to_byte(DemodBuffer+16, 8) )<< 32) | bytebits_to_byte(DemodBuffer+24,32);
 129
 130         PrintAndLog("Jablotron Tag Found: Card ID: %"PRIx64" :: Raw: %08X%08X", id, raw1, raw2);
 131
 132         uint8_t chksum = raw2 & 0xFF;
 133         PrintAndLog("Checksum: %02X [OK]", chksum);
 134
 135         // Printed format: 1410-nn-nnnn-nnnn
 136         PrintAndLog("Printed: 1410-%02X-%04X-%04X",
 137                 (uint8_t)(id >> 32) & 0xFF,
 138                 (uint16_t)(id >> 16) & 0xFFFF,
 139                 (uint16_t)id & 0xFFFF
 140         );
 141         return 1;
 142 }
 143
 144 int CmdJablotronRead(const char *Cmd) {
 145         lf_read(true, 10000);
 146         return CmdJablotronDemod(Cmd);
 147 }
 148
 149 int CmdJablotronClone(const char *Cmd) {
 150
 151         uint64_t fullcode = 0;
 152         uint32_t blocks[3] = {T55x7_MODULATION_DIPHASE | T55x7_BITRATE_RF_64 | 2 << T55x7_MAXBLOCK_SHIFT, 0, 0};
 153
 154         uint8_t bits[64];
 155         uint8_t *bs = bits;
 156         memset(bs, 0, sizeof(bits));
 157
 158         char cmdp = param_getchar(Cmd, 0);
 159         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_jablotron_clone();
 160
 161         fullcode = param_get64ex(Cmd, 0, 0, 16);
 162
 163         //Q5
 164         if (param_getchar(Cmd, 1) == 'Q' || param_getchar(Cmd, 1) == 'q') {
 165                 //t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
 166                 blocks[0] = T5555_MODULATION_BIPHASE | T5555_INVERT_OUTPUT | ((64-2)>>1) << T5555_BITRATE_SHIFT | 2 << T5555_MAXBLOCK_SHIFT;
 167         }
 168
 169         // clearing the topbit needed for the preambl detection.
 170         if ((fullcode & 0x7FFFFFFFFF) != fullcode) {
 171                 fullcode &= 0x7FFFFFFFFF;
 172                 PrintAndLog("Card Number Truncated to 39bits: %"PRIx64, fullcode);
 173         }
 174
 175         if ( !getJablotronBits(fullcode, bs)) {
 176                 PrintAndLog("Error with tag bitstream generation.");
 177                 return 1;
 178         }
 179
 180         blocks[1] = bytebits_to_byte(bs,32);
 181         blocks[2] = bytebits_to_byte(bs+32,32);
 182
 183         PrintAndLog("Preparing to clone Jablotron to T55x7 with FullCode: %"PRIx64, fullcode);
 184         PrintAndLog("Blk | Data ");
 185         PrintAndLog("----+------------");
 186         PrintAndLog(" 00 | 0x%08x", blocks[0]);
 187         PrintAndLog(" 01 | 0x%08x", blocks[1]);
 188         PrintAndLog(" 02 | 0x%08x", blocks[2]);
 189
 190         UsbCommand resp;
 191         UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
 192
 193         for (int i = 2; i >= 0; --i) {
 194                 c.arg[0] = blocks[i];
 195                 c.arg[1] = i;
 196                 clearCommandBuffer();
 197                 SendCommand(&c);
 198                 if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)) {
 199                         PrintAndLog("Error occurred, device did not respond during write operation.");
 200                         return -1;
 201                 }
 202         }
 203         return 0;
 204 }
 205
 206 int CmdJablotronSim(const char *Cmd) {
 207         uint64_t fullcode = 0;
 208
 209         char cmdp = param_getchar(Cmd, 0);
 210         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_jablotron_sim();
 211
 212         fullcode = param_get64ex(Cmd, 0, 0, 16);
 213
 214         // clearing the topbit needed for the preambl detection.
 215         if ((fullcode & 0x7FFFFFFFFF) != fullcode) {
 216                 fullcode &= 0x7FFFFFFFFF;
 217                 PrintAndLog("Card Number Truncated to 39bits: %"PRIx64, fullcode);
 218         }
 219
 220         uint8_t clk = 64, encoding = 2, separator = 0, invert = 1;
 221         uint16_t arg1, arg2;
 222         size_t size = 64;
 223         arg1 = clk << 8 | encoding;
 224         arg2 = invert << 8 | separator;
 225
 226         PrintAndLog("Simulating Jablotron - FullCode: %"PRIx64, fullcode);
 227
 228         UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
 229         getJablotronBits(fullcode, c.d.asBytes);
 230         clearCommandBuffer();
 231         SendCommand(&c);
 232         return 0;
 233 }
 234
 235 static command_t CommandTable[] = {
 236         {"help",  CmdHelp,           1, "This help"},
 237         {"demod", CmdJablotronDemod, 1, "Attempt to read and extract tag data from the GraphBuffer"},
 238         {"read",  CmdJablotronRead,  0, "Attempt to read and extract tag data from the antenna"},
 239         {"clone", CmdJablotronClone, 0, "clone jablotron tag"},
 240         {"sim",   CmdJablotronSim,   0, "simulate jablotron tag"},
 241         {NULL, NULL, 0, NULL}
 242 };
 243
 244 int CmdLFJablotron(const char *Cmd) {
 245         clearCommandBuffer();
 246         CmdsParse(CommandTable, Cmd);
 247         return 0;
 248 }
 249
 250 int CmdHelp(const char *Cmd) {
 251         CmdsHelp(CommandTable);
 252         return 0;
 253 }