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 Presco tag commands
   8 //-----------------------------------------------------------------------------
   9 #include "cmdlfjablotron.h"
  10
  11 static int CmdHelp(const char *Cmd);
  12
  13 int usage_lf_jablotron_clone(void){
  14         PrintAndLog("clone a Jablotron tag to a T55x7 tag.");
  15         PrintAndLog("Usage: lf jablotron clone [h] <card ID> <Q5>");
  16         PrintAndLog("Options:");
  17         PrintAndLog("      h          : This help");
  18         PrintAndLog("      <card ID>  : jablotron card ID");
  19         PrintAndLog("      <Q5>       : specify write to Q5 (t5555 instead of t55x7)");
  20         PrintAndLog("");
  21         PrintAndLog("Sample: lf jablotron clone 112233");
  22         return 0;
  23 }
  24
  25 int usage_lf_jablotron_sim(void) {
  26         PrintAndLog("Enables simulation of jablotron card with specified card number.");
  27         PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
  28         PrintAndLog("");
  29         PrintAndLog("Usage:  lf jablotron sim [h] <card ID>");
  30         PrintAndLog("Options:");
  31         PrintAndLog("      h          : This help");
  32         PrintAndLog("      <card ID>  : jablotron card ID");
  33         PrintAndLog("");
  34         PrintAndLog("Sample: lf jablotron sim 112233");
  35         return 0;
  36 }
  37
  38 static uint8_t jablontron_chksum(uint8_t *bits){
  39         uint8_t chksum = 0;
  40         for (int i=16; i < 56; i += 8) {
  41                 chksum += bytebits_to_byte(bits+i,8);
  42         }
  43         chksum ^= 0x3A;
  44         return chksum;
  45 }
  46
  47 int getJablotronBits(uint64_t fullcode, uint8_t *bits) {
  48         //preamp
  49         num_to_bytebits(0xFFFF, 16, bits);
  50
  51         //fullcode
  52         num_to_bytebits(fullcode, 40, bits+16);
  53
  54         //chksum byte
  55         uint8_t chksum = jablontron_chksum(bits);
  56         num_to_bytebits(chksum, 8, bits+56);
  57         return 1;
  58 }
  59
  60 //see ASKDemod for what args are accepted
  61 int CmdJablotronDemod(const char *Cmd) {
  62
  63         //Differential Biphase / di-phase (inverted biphase)
  64         //get binary from ask wave
  65         if (!ASKbiphaseDemod("0 64 1 0", FALSE)) {
  66                 if (g_debugMode) PrintAndLog("Error Jablotron: ASKbiphaseDemod failed");
  67                 return 0;
  68         }
  69         size_t size = DemodBufferLen;
  70         int ans = JablotronDemod(DemodBuffer, &size);
  71         if (ans < 0){
  72                 if (g_debugMode){
  73                         // if (ans == -5)
  74                                 // PrintAndLog("DEBUG: Error - not enough samples");
  75                         if (ans == -1)
  76                                 PrintAndLog("DEBUG: Error - Jablotron too few bits found");
  77                         // else if (ans == -2)
  78                                 // PrintAndLog("DEBUG: Error - problem during ASK/Biphase demod");
  79                         else if (ans == -3)
  80                                 PrintAndLog("DEBUG: Error - Jablotron Size not correct: %d", size);
  81                         else if (ans == -4)
  82                                 PrintAndLog("DEBUG: Error - Jablotron preamble not found");
  83                         else if (ans == -5)
  84                                 PrintAndLog("DEBUG: Error - Jablotron checksum failed");
  85                         else
  86                                 PrintAndLog("DEBUG: Error - ans: %d", ans);
  87                 }
  88                 return 0;
  89         }
  90
  91         setDemodBuf(DemodBuffer+ans, 64, 0);
  92
  93         //got a good demod
  94         uint32_t raw1 = bytebits_to_byte(DemodBuffer, 32);
  95         uint32_t raw2 = bytebits_to_byte(DemodBuffer+32, 32);
  96         uint64_t cardid = (raw1 & 0xFFFF);
  97         cardid <<= 24;
  98         cardid |= (raw2 >> 8);
  99
 100         PrintAndLog("Jablotron Tag Found: Card ID %"PRIx64, cardid);
 101         PrintAndLog("Raw: %08X%08X", raw1 ,raw2);
 102
 103         uint8_t chksum = raw2 & 0xFF;
 104         PrintAndLog("Checksum: %02X [%s]",
 105                 chksum,
 106                 (chksum == jablontron_chksum(DemodBuffer)) ? "OK":"FAIL"
 107         );
 108
 109         // Printed format: 1410-nn-nnnn-nnnn
 110         PrintAndLog("Printed:  1410-%02X-%04X-%04X",
 111                 (raw1 & 0x0000FF00) >> 8,
 112                 (raw1 & 0xFF) << 8 | ((raw2 >> 24) & 0xFF),
 113                 (raw2 & 0x00FFFF00) >> 8
 114         );
 115         return 1;
 116 }
 117
 118 int CmdJablotronRead(const char *Cmd) {
 119         CmdLFRead("s");
 120         getSamples("30000",false);
 121         return CmdJablotronDemod(Cmd);
 122 }
 123
 124 int CmdJablotronClone(const char *Cmd) {
 125
 126         uint64_t fullcode = 0;
 127         uint32_t blocks[3] = {T55x7_MODULATION_DIPHASE | T55x7_BITRATE_RF_64 | 2<<T55x7_MAXBLOCK_SHIFT, 0, 0};
 128
 129         uint8_t bits[64];
 130         uint8_t *bs = bits;
 131         memset(bs, 0, sizeof(bits));
 132
 133         char cmdp = param_getchar(Cmd, 0);
 134         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_jablotron_clone();
 135
 136         fullcode = param_get64ex(Cmd, 0, 0, 16);
 137
 138         //Q5
 139         if (param_getchar(Cmd, 1) == 'Q' || param_getchar(Cmd, 1) == 'q') {
 140                 //t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
 141                 blocks[0] = T5555_MODULATION_BIPHASE | T5555_INVERT_OUTPUT | 64<<T5555_BITRATE_SHIFT | 2<<T5555_MAXBLOCK_SHIFT;
 142         }
 143
 144         // clearing the topbit needed for the preambl detection.
 145         if ((fullcode & 0x7FFFFFFFFF) != fullcode) {
 146                 fullcode &= 0x7FFFFFFFFF;
 147                 PrintAndLog("Card Number Truncated to 39bits: %"PRIx64, fullcode);
 148         }
 149
 150         if ( !getJablotronBits(fullcode, bs)) {
 151                 PrintAndLog("Error with tag bitstream generation.");
 152                 return 1;
 153         }
 154
 155         //
 156         blocks[1] = bytebits_to_byte(bs,32);
 157         blocks[2] = bytebits_to_byte(bs+32,32);
 158
 159         PrintAndLog("Preparing to clone Jablotron to T55x7 with FullCode: %"PRIx64, fullcode);
 160         PrintAndLog("Blk | Data ");
 161         PrintAndLog("----+------------");
 162         PrintAndLog(" 00 | 0x%08x", blocks[0]);
 163         PrintAndLog(" 01 | 0x%08x", blocks[1]);
 164         PrintAndLog(" 02 | 0x%08x", blocks[2]);
 165
 166         UsbCommand resp;
 167         UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
 168
 169         for (int i=4; i>=0; i--) {
 170                 c.arg[0] = blocks[i];
 171                 c.arg[1] = i;
 172                 clearCommandBuffer();
 173                 SendCommand(&c);
 174                 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
 175                         PrintAndLog("Error occurred, device did not respond during write operation.");
 176                         return -1;
 177                 }
 178         }
 179     return 0;
 180 }
 181
 182 int CmdJablotronSim(const char *Cmd) {
 183         uint64_t fullcode = 0;
 184
 185         char cmdp = param_getchar(Cmd, 0);
 186         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_jablotron_sim();
 187
 188         fullcode = param_get64ex(Cmd, 0, 0, 16);
 189
 190         // clearing the topbit needed for the preambl detection.
 191         if ((fullcode & 0x7FFFFFFFFF) != fullcode) {
 192                 fullcode &= 0x7FFFFFFFFF;
 193                 PrintAndLog("Card Number Truncated to 39bits: %"PRIx64, fullcode);
 194         }
 195
 196         uint8_t clk = 64, encoding = 2, separator = 0, invert = 1;
 197         uint16_t arg1, arg2;
 198         size_t size = 64;
 199         arg1 = clk << 8 | encoding;
 200         arg2 = invert << 8 | separator;
 201
 202         PrintAndLog("Simulating Jablotron - FullCode: %"PRIx64, fullcode);
 203
 204         UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
 205         getJablotronBits(fullcode, c.d.asBytes);
 206         clearCommandBuffer();
 207         SendCommand(&c);
 208         return 0;
 209 }
 210
 211 static command_t CommandTable[] = {
 212     {"help",    CmdHelp,                        1, "This help"},
 213         {"read",        CmdJablotronRead,       0, "Attempt to read and extract tag data"},
 214         {"clone",       CmdJablotronClone,      0, "clone jablotron tag"},
 215         {"sim",         CmdJablotronSim,        0, "simulate jablotron tag"},
 216     {NULL, NULL, 0, NULL}
 217 };
 218
 219 int CmdLFJablotron(const char *Cmd) {
 220         clearCommandBuffer();
 221     CmdsParse(CommandTable, Cmd);
 222     return 0;
 223 }
 224
 225 int CmdHelp(const char *Cmd) {
 226     CmdsHelp(CommandTable);
 227     return 0;
 228 }