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