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 <math.h>
  10 #include "cmdlfjablotron.h"
  11
  12 static int CmdHelp(const char *Cmd);
  13
  14 int usage_lf_jablotron_clone(void){
  15         PrintAndLog("clone a Jablotron tag to a T55x7 tag.");
  16         PrintAndLog("Usage: lf jablotron clone [h] <card ID> <Q5>");
  17         PrintAndLog("Options:");
  18         PrintAndLog("      h          : This help");
  19         PrintAndLog("      <card ID>  : jablotron card ID");
  20         PrintAndLog("      <Q5>       : specify write to Q5 (t5555 instead of t55x7)");
  21         PrintAndLog("");
  22         PrintAndLog("Sample: lf jablotron clone 112233");
  23         return 0;
  24 }
  25
  26 int usage_lf_jablotron_sim(void) {
  27         PrintAndLog("Enables simulation of jablotron card with specified card number.");
  28         PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
  29         PrintAndLog("");
  30         PrintAndLog("Usage:  lf jablotron sim [h] <card ID>");
  31         PrintAndLog("Options:");
  32         PrintAndLog("      h          : This help");
  33         PrintAndLog("      <card ID>  : jablotron card ID");
  34         PrintAndLog("");
  35         PrintAndLog("Sample: lf jablotron sim 112233");
  36         return 0;
  37 }
  38
  39 static uint8_t jablontron_chksum(uint8_t *bits){
  40         uint8_t chksum = 0;
  41         for (int i=16; i < 56; i += 8) {
  42                 chksum += bytebits_to_byte(bits+i,8);
  43         }
  44         chksum ^= 0x3A;
  45         return chksum;
  46 }
  47
  48 int getJablotronBits(uint64_t fullcode, uint8_t *bits) {
  49         //preamp
  50         num_to_bytebits(0xFFFF, 16, bits);
  51
  52         //fullcode
  53         num_to_bytebits(fullcode, 40, bits+16);
  54
  55         //chksum byte
  56         uint8_t chksum = jablontron_chksum(bits);
  57         num_to_bytebits(chksum, 8, bits+56);
  58         return 1;
  59 }
  60
  61 static uint64_t getJablontronCardId( uint64_t rawcode ){
  62         uint64_t id = 0;
  63         uint8_t bytes[] = {0,0,0,0,0};
  64         num_to_bytes(rawcode, 5, bytes);
  65         for ( int i = 4, j = 0; i > -1;  --i, j += 2 ) {
  66                 id += NIBBLE_LOW( bytes[i] ) * (int)pow(10,j);
  67                 id += NIBBLE_HIGH( bytes[i] ) * (int)pow(10,j+1);
  68         }
  69         return id;
  70 }
  71
  72 //see ASKDemod for what args are accepted
  73 int CmdJablotronDemod(const char *Cmd) {
  74
  75         //Differential Biphase / di-phase (inverted biphase)
  76         //get binary from ask wave
  77         if (!ASKbiphaseDemod("0 64 1 0", FALSE)) {
  78                 if (g_debugMode) PrintAndLog("Error Jablotron: ASKbiphaseDemod failed");
  79                 return 0;
  80         }
  81         size_t size = DemodBufferLen;
  82         int ans = JablotronDemod(DemodBuffer, &size);
  83         if (ans < 0){
  84                 if (g_debugMode){
  85                         // if (ans == -5)
  86                                 // PrintAndLog("DEBUG: Error - not enough samples");
  87                         if (ans == -1)
  88                                 PrintAndLog("DEBUG: Error - Jablotron too few bits found");
  89                         // else if (ans == -2)
  90                                 // PrintAndLog("DEBUG: Error - problem during ASK/Biphase demod");
  91                         else if (ans == -3)
  92                                 PrintAndLog("DEBUG: Error - Jablotron Size not correct: %d", size);
  93                         else if (ans == -4)
  94                                 PrintAndLog("DEBUG: Error - Jablotron preamble not found");
  95                         else if (ans == -5)
  96                                 PrintAndLog("DEBUG: Error - Jablotron checksum failed");
  97                         else
  98                                 PrintAndLog("DEBUG: Error - ans: %d", ans);
  99                 }
 100                 return 0;
 101         }
 102
 103         setDemodBuf(DemodBuffer+ans, 64, 0);
 104
 105         //got a good demod
 106         uint32_t raw1 = bytebits_to_byte(DemodBuffer, 32);
 107         uint32_t raw2 = bytebits_to_byte(DemodBuffer+32, 32);
 108
 109         uint64_t rawid = bytebits_to_byte(DemodBuffer+16, 40);
 110         uint64_t id = getJablontronCardId(rawid);
 111
 112         PrintAndLog("Jablotron Tag Found: Card ID %u", id);
 113         PrintAndLog("Raw: %08X%08X", raw1 ,raw2);
 114
 115         uint8_t chksum = raw2 & 0xFF;
 116         PrintAndLog("Checksum: %02X [%s]",
 117                 chksum,
 118                 (chksum == jablontron_chksum(DemodBuffer)) ? "OK":"FAIL"
 119         );
 120
 121         id = DEC2BCD(id);
 122         // Printed format: 1410-nn-nnnn-nnnn
 123         PrintAndLog("Printed: 1410-%02X-%04X-%04X",
 124                 (uint8_t)(id >> 32) & 0xFF,
 125                 (uint16_t)(id >> 16) & 0xFFFF,
 126                 (uint16_t)id & 0xFFFF
 127         );
 128         return 1;
 129 }
 130
 131 int CmdJablotronRead(const char *Cmd) {
 132         CmdLFRead("s");
 133         getSamples("30000",false);
 134         return CmdJablotronDemod(Cmd);
 135 }
 136
 137 int CmdJablotronClone(const char *Cmd) {
 138
 139         uint64_t fullcode = 0;
 140         uint32_t blocks[3] = {T55x7_MODULATION_DIPHASE | T55x7_BITRATE_RF_64 | 2<<T55x7_MAXBLOCK_SHIFT, 0, 0};
 141
 142         uint8_t bits[64];
 143         uint8_t *bs = bits;
 144         memset(bs, 0, sizeof(bits));
 145
 146         char cmdp = param_getchar(Cmd, 0);
 147         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_jablotron_clone();
 148
 149         fullcode = param_get64ex(Cmd, 0, 0, 16);
 150
 151         //Q5
 152         if (param_getchar(Cmd, 1) == 'Q' || param_getchar(Cmd, 1) == 'q') {
 153                 //t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
 154                 blocks[0] = T5555_MODULATION_BIPHASE | T5555_INVERT_OUTPUT | 64<<T5555_BITRATE_SHIFT | 2<<T5555_MAXBLOCK_SHIFT;
 155         }
 156
 157         // clearing the topbit needed for the preambl detection.
 158         if ((fullcode & 0x7FFFFFFFFF) != fullcode) {
 159                 fullcode &= 0x7FFFFFFFFF;
 160                 PrintAndLog("Card Number Truncated to 39bits: %"PRIx64, fullcode);
 161         }
 162
 163         if ( !getJablotronBits(fullcode, bs)) {
 164                 PrintAndLog("Error with tag bitstream generation.");
 165                 return 1;
 166         }
 167
 168         //
 169         blocks[1] = bytebits_to_byte(bs,32);
 170         blocks[2] = bytebits_to_byte(bs+32,32);
 171
 172         PrintAndLog("Preparing to clone Jablotron to T55x7 with FullCode: %"PRIx64, fullcode);
 173         PrintAndLog("Blk | Data ");
 174         PrintAndLog("----+------------");
 175         PrintAndLog(" 00 | 0x%08x", blocks[0]);
 176         PrintAndLog(" 01 | 0x%08x", blocks[1]);
 177         PrintAndLog(" 02 | 0x%08x", blocks[2]);
 178
 179         UsbCommand resp;
 180         UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
 181
 182         for (int i=4; i>=0; i--) {
 183                 c.arg[0] = blocks[i];
 184                 c.arg[1] = i;
 185                 clearCommandBuffer();
 186                 SendCommand(&c);
 187                 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
 188                         PrintAndLog("Error occurred, device did not respond during write operation.");
 189                         return -1;
 190                 }
 191         }
 192     return 0;
 193 }
 194
 195 int CmdJablotronSim(const char *Cmd) {
 196         uint64_t fullcode = 0;
 197
 198         char cmdp = param_getchar(Cmd, 0);
 199         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_jablotron_sim();
 200
 201         fullcode = param_get64ex(Cmd, 0, 0, 16);
 202
 203         // clearing the topbit needed for the preambl detection.
 204         if ((fullcode & 0x7FFFFFFFFF) != fullcode) {
 205                 fullcode &= 0x7FFFFFFFFF;
 206                 PrintAndLog("Card Number Truncated to 39bits: %"PRIx64, fullcode);
 207         }
 208
 209         uint8_t clk = 64, encoding = 2, separator = 0, invert = 1;
 210         uint16_t arg1, arg2;
 211         size_t size = 64;
 212         arg1 = clk << 8 | encoding;
 213         arg2 = invert << 8 | separator;
 214
 215         PrintAndLog("Simulating Jablotron - FullCode: %"PRIx64, fullcode);
 216
 217         UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
 218         getJablotronBits(fullcode, c.d.asBytes);
 219         clearCommandBuffer();
 220         SendCommand(&c);
 221         return 0;
 222 }
 223
 224 static command_t CommandTable[] = {
 225     {"help",    CmdHelp,                        1, "This help"},
 226         {"read",        CmdJablotronRead,       0, "Attempt to read and extract tag data"},
 227         {"clone",       CmdJablotronClone,      0, "clone jablotron tag"},
 228         {"sim",         CmdJablotronSim,        0, "simulate jablotron tag"},
 229     {NULL, NULL, 0, NULL}
 230 };
 231
 232 int CmdLFJablotron(const char *Cmd) {
 233         clearCommandBuffer();
 234     CmdsParse(CommandTable, Cmd);
 235     return 0;
 236 }
 237
 238 int CmdHelp(const char *Cmd) {
 239     CmdsHelp(CommandTable);
 240     return 0;
 241 }