git.zerfleddert.de Git - proxmark3-svn/blob - client/cmdlfpyramid.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 Farpoint / Pyramid tag commands
   8 // FSK2a, rf/50, 128 bits (complete)
   9 //-----------------------------------------------------------------------------
  10
  11 #include "cmdlfpyramid.h"
  12
  13 #include <string.h>
  14 #include <inttypes.h>
  15 #include <stdio.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"    // setDemodBuf +
  22 #include "cmdmain.h"
  23 #include "cmdlf.h"
  24 #include "protocols.h"  // for T55xx config register definitions
  25 #include "lfdemod.h"    // parityTest
  26 #include "crc.h"
  27
  28 static int CmdHelp(const char *Cmd);
  29
  30 int usage_lf_pyramid_clone(void){
  31         PrintAndLog("clone a Farpointe/Pyramid tag to a T55x7 tag.");
  32         PrintAndLog("The facility-code is 8-bit and the card number is 16-bit.  Larger values are truncated. ");
  33         PrintAndLog("Currently only works on 26bit");
  34         PrintAndLog("");
  35         PrintAndLog("Usage: lf pyramid clone <Facility-Code> <Card-Number>");
  36         PrintAndLog("Options :");
  37         PrintAndLog("  <Facility-Code> :  8-bit value facility code");
  38         PrintAndLog("  <Card Number>   : 16-bit value card number");
  39         PrintAndLog("  Q5              : optional - clone to Q5 (T5555) instead of T55x7 chip");
  40         PrintAndLog("");
  41         PrintAndLog("Sample  : lf pyramid clone 123 11223");
  42         return 0;
  43 }
  44
  45 int usage_lf_pyramid_sim(void) {
  46         PrintAndLog("Enables simulation of Farpointe/Pyramid card with specified card number.");
  47         PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
  48         PrintAndLog("The facility-code is 8-bit and the card number is 16-bit.  Larger values are truncated.");
  49         PrintAndLog("Currently work only on 26bit");
  50         PrintAndLog("");
  51         PrintAndLog("Usage:  lf pyramid sim <Card-Number>");
  52         PrintAndLog("Options :");
  53         PrintAndLog("  <Facility-Code> :  8-bit value facility code");
  54         PrintAndLog("  <Card Number>   : 16-bit value card number");
  55         PrintAndLog("");
  56         PrintAndLog("Sample  : lf pyramid sim 123 11223");
  57         return 0;
  58 }
  59
  60 // Works for 26bits.
  61 int GetPyramidBits(uint32_t fc, uint32_t cn, uint8_t *pyramidBits) {
  62
  63         uint8_t pre[128];
  64         memset(pre, 0x00, sizeof(pre));
  65
  66         // format start bit
  67         pre[79] = 1;
  68
  69         // Get 26 wiegand from FacilityCode, CardNumber
  70         uint8_t wiegand[24];
  71         memset(wiegand, 0x00, sizeof(wiegand));
  72         num_to_bytebits(fc, 8, wiegand);
  73         num_to_bytebits(cn, 16, wiegand+8);
  74
  75         // add wiegand parity bits (dest, source, len)
  76         wiegand_add_parity(pre+80, wiegand, 24);
  77
  78         // add paritybits       (bitsource, dest, sourcelen, paritylen, parityType (odd, even,)
  79         addParity(pre+8, pyramidBits+8, 102, 8, 1);
  80
  81         // add checksum
  82         uint8_t csBuff[13];
  83         for (uint8_t i = 0; i < 13; i++)
  84                 csBuff[i] = bytebits_to_byte(pyramidBits + 16 + (i*8), 8);
  85
  86         uint32_t crc = CRC8Maxim(csBuff, 13);
  87         num_to_bytebits(crc, 8, pyramidBits+120);
  88         return 1;
  89 }
  90
  91 //by marshmellow
  92 //Pyramid Prox demod - FSK RF/50 with preamble of 0000000000000001  (always a 128 bit data stream)
  93 //print full Farpointe Data/Pyramid Prox ID and some bit format details if found
  94 int CmdFSKdemodPyramid(const char *Cmd)
  95 {
  96         //raw fsk demod no manchester decoding no start bit finding just get binary from wave
  97         uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
  98         size_t size = getFromGraphBuf(BitStream);
  99         if (size==0) return 0;
 100
 101         int waveIdx=0;
 102         //get binary from fsk wave
 103         int idx = PyramiddemodFSK(BitStream, &size, &waveIdx);
 104         if (idx < 0){
 105                 if (g_debugMode){
 106                         if (idx == -5)
 107                                 PrintAndLog("DEBUG: Error - not enough samples");
 108                         else if (idx == -1)
 109                                 PrintAndLog("DEBUG: Error - only noise found");
 110                         else if (idx == -2)
 111                                 PrintAndLog("DEBUG: Error - problem during FSK demod");
 112                         else if (idx == -3)
 113                                 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
 114                         else if (idx == -4)
 115                                 PrintAndLog("DEBUG: Error - Pyramid preamble not found");
 116                         else
 117                                 PrintAndLog("DEBUG: Error - idx: %d",idx);
 118                 }
 119                 return 0;
 120         }
 121         // Index map
 122         // 0           10          20          30            40          50          60
 123         // |           |           |           |             |           |           |
 124         // 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3
 125         // -----------------------------------------------------------------------------
 126         // 0000000 0 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1
 127         // premable  xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o
 128
 129         // 64    70            80          90          100         110           120
 130         // |     |             |           |           |           |             |
 131         // 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7
 132         // -----------------------------------------------------------------------------
 133         // 0000000 1 0000000 1 0000000 1 0110111 0 0011000 1 0000001 0 0001100 1 1001010 0
 134         // xxxxxxx o xxxxxxx o xxxxxxx o xswffff o ffffccc o ccccccc o ccccccw o ppppppp o
 135         //                                  |---115---||---------71---------|
 136         // s = format start bit, o = odd parity of last 7 bits
 137         // f = facility code, c = card number
 138         // w = wiegand parity, x = extra space for other formats
 139         // p = unknown checksum
 140         // (26 bit format shown)
 141
 142         //get bytes for checksum calc
 143         uint8_t checksum = bytebits_to_byte(BitStream + idx + 120, 8);
 144         uint8_t csBuff[14] = {0x00};
 145         for (uint8_t i = 0; i < 13; i++){
 146                 csBuff[i] = bytebits_to_byte(BitStream + idx + 16 + (i*8), 8);
 147         }
 148         //check checksum calc
 149         //checksum calc thanks to ICEMAN!!
 150         uint32_t checkCS =  CRC8Maxim(csBuff,13);
 151
 152         //get raw ID before removing parities
 153         uint32_t rawLo = bytebits_to_byte(BitStream+idx+96,32);
 154         uint32_t rawHi = bytebits_to_byte(BitStream+idx+64,32);
 155         uint32_t rawHi2 = bytebits_to_byte(BitStream+idx+32,32);
 156         uint32_t rawHi3 = bytebits_to_byte(BitStream+idx,32);
 157         setDemodBuf(BitStream,128,idx);
 158         setClockGrid(50, waveIdx + (idx*50));
 159
 160         size = removeParity(BitStream, idx+8, 8, 1, 120);
 161         if (size != 105){
 162                 if (g_debugMode)
 163                         PrintAndLog("DEBUG: Error at parity check - tag size does not match Pyramid format, SIZE: %d, IDX: %d, hi3: %x",size, idx, rawHi3);
 164                 return 0;
 165         }
 166
 167         // ok valid card found!
 168
 169         // Index map
 170         // 0         10        20        30        40        50        60        70
 171         // |         |         |         |         |         |         |         |
 172         // 01234567890123456789012345678901234567890123456789012345678901234567890
 173         // -----------------------------------------------------------------------
 174         // 00000000000000000000000000000000000000000000000000000000000000000000000
 175         // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
 176
 177         // 71         80         90          100
 178         // |          |          |           |
 179         // 1 2 34567890 1234567890123456 7 8901234
 180         // ---------------------------------------
 181         // 1 1 01110011 0000000001000110 0 1001010
 182         // s w ffffffff cccccccccccccccc w ppppppp
 183         //     |--115-| |------71------|
 184         // s = format start bit, o = odd parity of last 7 bits
 185         // f = facility code, c = card number
 186         // w = wiegand parity, x = extra space for other formats
 187         // p = unknown checksum
 188         // (26 bit format shown)
 189
 190         //find start bit to get fmtLen
 191         int j;
 192         for (j=0; j<size; j++){
 193                 if(BitStream[j]) break;
 194         }
 195         uint8_t fmtLen = size-j-8;
 196         uint32_t fc = 0;
 197         uint32_t cardnum = 0;
 198         uint32_t code1 = 0;
 199         if (fmtLen==26){
 200                 fc = bytebits_to_byte(BitStream+73, 8);
 201                 cardnum = bytebits_to_byte(BitStream+81, 16);
 202                 code1 = bytebits_to_byte(BitStream+72,fmtLen);
 203                 PrintAndLog("Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi3, rawHi2, rawHi, rawLo);
 204         } else if (fmtLen==45){
 205                 fmtLen=42; //end = 10 bits not 7 like 26 bit fmt
 206                 fc = bytebits_to_byte(BitStream+53, 10);
 207                 cardnum = bytebits_to_byte(BitStream+63, 32);
 208                 PrintAndLog("Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, rawHi3, rawHi2, rawHi, rawLo);
 209         } else {
 210                 cardnum = bytebits_to_byte(BitStream+81, 16);
 211                 if (fmtLen>32){
 212                         //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen-32);
 213                         //code2 = bytebits_to_byte(BitStream+(size-32),32);
 214                         PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
 215                 } else{
 216                         //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen);
 217                         PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
 218                 }
 219         }
 220         if (checksum == checkCS)
 221                 PrintAndLog("Checksum %02x passed", checksum);
 222         else
 223                 PrintAndLog("Checksum %02x failed - should have been %02x", checksum, checkCS);
 224
 225         if (g_debugMode){
 226                 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128);
 227                 printDemodBuff();
 228         }
 229         return 1;
 230 }
 231
 232 int CmdPyramidRead(const char *Cmd) {
 233         lf_read(true, 15000);
 234         return CmdFSKdemodPyramid("");
 235 }
 236
 237 int CmdPyramidClone(const char *Cmd) {
 238
 239         char cmdp = param_getchar(Cmd, 0);
 240         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_pyramid_clone();
 241
 242         uint32_t facilitycode=0, cardnumber=0, fc = 0, cn = 0;
 243         uint32_t blocks[5];
 244         uint8_t i;
 245         uint8_t bs[128];
 246         memset(bs, 0x00, sizeof(bs));
 247
 248         if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_pyramid_clone();
 249
 250         facilitycode = (fc & 0x000000FF);
 251         cardnumber = (cn & 0x0000FFFF);
 252
 253         if ( !GetPyramidBits(facilitycode, cardnumber, bs)) {
 254                 PrintAndLog("Error with tag bitstream generation.");
 255                 return 1;
 256         }
 257
 258         //Pyramid - compat mode, FSK2a, data rate 50, 4 data blocks
 259         blocks[0] = T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 4<<T55x7_MAXBLOCK_SHIFT;
 260
 261         if (param_getchar(Cmd, 3) == 'Q' || param_getchar(Cmd, 3) == 'q')
 262                 blocks[0] = T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | 50<<T5555_BITRATE_SHIFT | 4<<T5555_MAXBLOCK_SHIFT;
 263
 264         blocks[1] = bytebits_to_byte(bs,32);
 265         blocks[2] = bytebits_to_byte(bs+32,32);
 266         blocks[3] = bytebits_to_byte(bs+64,32);
 267         blocks[4] = bytebits_to_byte(bs+96,32);
 268
 269         PrintAndLog("Preparing to clone Farpointe/Pyramid to T55x7 with Facility Code: %u, Card Number: %u", facilitycode, cardnumber);
 270         PrintAndLog("Blk | Data ");
 271         PrintAndLog("----+------------");
 272         for ( i = 0; i<5; ++i )
 273                 PrintAndLog(" %02d | %08" PRIx32, i, blocks[i]);
 274
 275         UsbCommand resp;
 276         UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
 277
 278         for ( i = 0; i<5; ++i ) {
 279                 c.arg[0] = blocks[i];
 280                 c.arg[1] = i;
 281                 clearCommandBuffer();
 282                 SendCommand(&c);
 283                 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
 284                         PrintAndLog("Error occurred, device did not respond during write operation.");
 285                         return -1;
 286                 }
 287         }
 288         return 0;
 289 }
 290
 291 int CmdPyramidSim(const char *Cmd) {
 292
 293         char cmdp = param_getchar(Cmd, 0);
 294         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_pyramid_sim();
 295
 296         uint32_t facilitycode = 0, cardnumber = 0, fc = 0, cn = 0;
 297
 298         uint8_t bs[128];
 299         size_t size = sizeof(bs);
 300         memset(bs, 0x00, size);
 301
 302         // Pyramid uses:  fcHigh: 10, fcLow: 8, clk: 50, invert: 0
 303         uint64_t arg1, arg2;
 304         arg1 = (10 << 8) + 8;
 305         arg2 = 50 | 0;
 306
 307         if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_pyramid_sim();
 308
 309         facilitycode = (fc & 0x000000FF);
 310         cardnumber = (cn & 0x0000FFFF);
 311
 312         if ( !GetPyramidBits(facilitycode, cardnumber, bs)) {
 313                 PrintAndLog("Error with tag bitstream generation.");
 314                 return 1;
 315         }
 316
 317         PrintAndLog("Simulating Farpointe/Pyramid - Facility Code: %u, CardNumber: %u", facilitycode, cardnumber );
 318
 319         UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
 320         memcpy(c.d.asBytes, bs, size);
 321         clearCommandBuffer();
 322         SendCommand(&c);
 323         return 0;
 324 }
 325
 326 static command_t CommandTable[] = {
 327         {"help",  CmdHelp,            1, "This help"},
 328         {"demod", CmdFSKdemodPyramid, 1, "Demodulate a Pyramid FSK tag from the GraphBuffer"},
 329         {"read",  CmdPyramidRead,     0, "Attempt to read and extract tag data"},
 330         {"clone", CmdPyramidClone,    0, "<Facility-Code> <Card Number>  clone pyramid tag"},
 331         {"sim",   CmdPyramidSim,      0, "<Facility-Code> <Card Number>  simulate pyramid tag"},
 332         {NULL, NULL, 0, NULL}
 333 };
 334
 335 int CmdLFPyramid(const char *Cmd) {
 336         clearCommandBuffer();
 337         CmdsParse(CommandTable, Cmd);
 338         return 0;
 339 }
 340
 341 int CmdHelp(const char *Cmd) {
 342         CmdsHelp(CommandTable);
 343         return 0;
 344 }