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 //-----------------------------------------------------------------------------
   9 #include <string.h>
  10 #include <inttypes.h>
  11 #include <stdio.h>
  12 #include "proxmark3.h"
  13 #include "ui.h"
  14 #include "util.h"
  15 #include "graph.h"
  16 #include "cmdparser.h"
  17 #include "cmddata.h"    // setDemodBuf +
  18 #include "cmdmain.h"
  19 #include "cmdlf.h"
  20 #include "protocols.h"  // for T55xx config register definitions
  21 #include "lfdemod.h"    // parityTest
  22 #include "crc.h"
  23
  24 static int CmdHelp(const char *Cmd);
  25
  26 int usage_lf_pyramid_clone(void){
  27         PrintAndLog("clone a Farpointe/Pyramid tag to a T55x7 tag.");
  28         PrintAndLog("The facility-code is 8-bit and the card number is 16-bit.  Larger values are truncated. ");
  29         PrintAndLog("Currently only works on 26bit");
  30         PrintAndLog("");
  31         PrintAndLog("Usage: lf pyramid clone <Facility-Code> <Card-Number>");
  32         PrintAndLog("Options :");
  33         PrintAndLog("  <Facility-Code> :  8-bit value facility code");
  34         PrintAndLog("  <Card Number>   : 16-bit value card number");
  35         PrintAndLog("  Q5              : optional - clone to Q5 (T5555) instead of T55x7 chip");
  36         PrintAndLog("");
  37         PrintAndLog("Sample  : lf pyramid clone 123 11223");
  38         return 0;
  39 }
  40
  41 int usage_lf_pyramid_sim(void) {
  42         PrintAndLog("Enables simulation of Farpointe/Pyramid card with specified card number.");
  43         PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
  44         PrintAndLog("The facility-code is 8-bit and the card number is 16-bit.  Larger values are truncated.");
  45         PrintAndLog("Currently work only on 26bit");
  46         PrintAndLog("");
  47         PrintAndLog("Usage:  lf pyramid sim <Card-Number>");
  48         PrintAndLog("Options :");
  49         PrintAndLog("  <Facility-Code> :  8-bit value facility code");
  50         PrintAndLog("  <Card Number>   : 16-bit value card number");
  51         PrintAndLog("");
  52         PrintAndLog("Sample  : lf pyramid sim 123 11223");
  53         return 0;
  54 }
  55
  56 // Works for 26bits.
  57 int GetPyramidBits(uint32_t fc, uint32_t cn, uint8_t *pyramidBits) {
  58
  59         uint8_t pre[128];
  60         memset(pre, 0x00, sizeof(pre));
  61
  62         // format start bit
  63         pre[79] = 1;
  64
  65         // Get 26 wiegand from FacilityCode, CardNumber
  66         uint8_t wiegand[24];
  67         memset(wiegand, 0x00, sizeof(wiegand));
  68         num_to_bytebits(fc, 8, wiegand);
  69         num_to_bytebits(cn, 16, wiegand+8);
  70
  71         // add wiegand parity bits (dest, source, len)
  72         wiegand_add_parity(pre+80, wiegand, 24);
  73
  74         // add paritybits       (bitsource, dest, sourcelen, paritylen, parityType (odd, even,)
  75         addParity(pre+8, pyramidBits+8, 102, 8, 1);
  76
  77         // add checksum
  78         uint8_t csBuff[13];
  79         for (uint8_t i = 0; i < 13; i++)
  80                 csBuff[i] = bytebits_to_byte(pyramidBits + 16 + (i*8), 8);
  81
  82         uint32_t crc = CRC8Maxim(csBuff, 13);
  83         num_to_bytebits(crc, 8, pyramidBits+120);
  84         return 1;
  85 }
  86
  87 //by marshmellow
  88 //Pyramid Prox demod - FSK RF/50 with preamble of 0000000000000001  (always a 128 bit data stream)
  89 //print full Farpointe Data/Pyramid Prox ID and some bit format details if found
  90 int CmdFSKdemodPyramid(const char *Cmd)
  91 {
  92         //raw fsk demod no manchester decoding no start bit finding just get binary from wave
  93         uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
  94         size_t size = getFromGraphBuf(BitStream);
  95         if (size==0) return 0;
  96
  97         //get binary from fsk wave
  98         int idx = PyramiddemodFSK(BitStream, &size);
  99         if (idx < 0){
 100                 if (g_debugMode){
 101                         if (idx == -5)
 102                                 PrintAndLog("DEBUG: Error - not enough samples");
 103                         else if (idx == -1)
 104                                 PrintAndLog("DEBUG: Error - only noise found");
 105                         else if (idx == -2)
 106                                 PrintAndLog("DEBUG: Error - problem during FSK demod");
 107                         else if (idx == -3)
 108                                 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
 109                         else if (idx == -4)
 110                                 PrintAndLog("DEBUG: Error - Pyramid preamble not found");
 111                         else
 112                                 PrintAndLog("DEBUG: Error - idx: %d",idx);
 113                 }
 114                 return 0;
 115         }
 116         // Index map
 117         // 0           10          20          30            40          50          60
 118         // |           |           |           |             |           |           |
 119         // 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3
 120         // -----------------------------------------------------------------------------
 121         // 0000000 0 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1
 122         // premable  xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o
 123
 124         // 64    70            80          90          100         110           120
 125         // |     |             |           |           |           |             |
 126         // 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7
 127         // -----------------------------------------------------------------------------
 128         // 0000000 1 0000000 1 0000000 1 0110111 0 0011000 1 0000001 0 0001100 1 1001010 0
 129         // xxxxxxx o xxxxxxx o xxxxxxx o xswffff o ffffccc o ccccccc o ccccccw o ppppppp o
 130         //                                  |---115---||---------71---------|
 131         // s = format start bit, o = odd parity of last 7 bits
 132         // f = facility code, c = card number
 133         // w = wiegand parity, x = extra space for other formats
 134         // p = unknown checksum
 135         // (26 bit format shown)
 136
 137         //get bytes for checksum calc
 138         uint8_t checksum = bytebits_to_byte(BitStream + idx + 120, 8);
 139         uint8_t csBuff[14] = {0x00};
 140         for (uint8_t i = 0; i < 13; i++){
 141                 csBuff[i] = bytebits_to_byte(BitStream + idx + 16 + (i*8), 8);
 142         }
 143         //check checksum calc
 144         //checksum calc thanks to ICEMAN!!
 145         uint32_t checkCS =  CRC8Maxim(csBuff,13);
 146
 147         //get raw ID before removing parities
 148         uint32_t rawLo = bytebits_to_byte(BitStream+idx+96,32);
 149         uint32_t rawHi = bytebits_to_byte(BitStream+idx+64,32);
 150         uint32_t rawHi2 = bytebits_to_byte(BitStream+idx+32,32);
 151         uint32_t rawHi3 = bytebits_to_byte(BitStream+idx,32);
 152         setDemodBuf(BitStream,128,idx);
 153
 154         size = removeParity(BitStream, idx+8, 8, 1, 120);
 155         if (size != 105){
 156                 if (g_debugMode)
 157                         PrintAndLog("DEBUG: Error at parity check - tag size does not match Pyramid format, SIZE: %d, IDX: %d, hi3: %x",size, idx, rawHi3);
 158                 return 0;
 159         }
 160
 161         // ok valid card found!
 162
 163         // Index map
 164         // 0         10        20        30        40        50        60        70
 165         // |         |         |         |         |         |         |         |
 166         // 01234567890123456789012345678901234567890123456789012345678901234567890
 167         // -----------------------------------------------------------------------
 168         // 00000000000000000000000000000000000000000000000000000000000000000000000
 169         // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
 170
 171         // 71         80         90          100
 172         // |          |          |           |
 173         // 1 2 34567890 1234567890123456 7 8901234
 174         // ---------------------------------------
 175         // 1 1 01110011 0000000001000110 0 1001010
 176         // s w ffffffff cccccccccccccccc w ppppppp
 177         //     |--115-| |------71------|
 178         // s = format start bit, o = odd parity of last 7 bits
 179         // f = facility code, c = card number
 180         // w = wiegand parity, x = extra space for other formats
 181         // p = unknown checksum
 182         // (26 bit format shown)
 183
 184         //find start bit to get fmtLen
 185         int j;
 186         for (j=0; j<size; j++){
 187                 if(BitStream[j]) break;
 188         }
 189         uint8_t fmtLen = size-j-8;
 190         uint32_t fc = 0;
 191         uint32_t cardnum = 0;
 192         uint32_t code1 = 0;
 193         if (fmtLen==26){
 194                 fc = bytebits_to_byte(BitStream+73, 8);
 195                 cardnum = bytebits_to_byte(BitStream+81, 16);
 196                 code1 = bytebits_to_byte(BitStream+72,fmtLen);
 197                 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);
 198         } else if (fmtLen==45){
 199                 fmtLen=42; //end = 10 bits not 7 like 26 bit fmt
 200                 fc = bytebits_to_byte(BitStream+53, 10);
 201                 cardnum = bytebits_to_byte(BitStream+63, 32);
 202                 PrintAndLog("Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, rawHi3, rawHi2, rawHi, rawLo);
 203         } else {
 204                 cardnum = bytebits_to_byte(BitStream+81, 16);
 205                 if (fmtLen>32){
 206                         //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen-32);
 207                         //code2 = bytebits_to_byte(BitStream+(size-32),32);
 208                         PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
 209                 } else{
 210                         //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen);
 211                         PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
 212                 }
 213         }
 214         if (checksum == checkCS)
 215                 PrintAndLog("Checksum %02x passed", checksum);
 216         else
 217                 PrintAndLog("Checksum %02x failed - should have been %02x", checksum, checkCS);
 218
 219         if (g_debugMode){
 220                 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128);
 221                 printDemodBuff();
 222         }
 223         return 1;
 224 }
 225
 226 int CmdPyramidRead(const char *Cmd) {
 227         CmdLFRead("s");
 228         getSamples("30000",false);
 229         return CmdFSKdemodPyramid("");
 230 }
 231
 232 int CmdPyramidClone(const char *Cmd) {
 233
 234         char cmdp = param_getchar(Cmd, 0);
 235         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_pyramid_clone();
 236
 237         uint32_t facilitycode=0, cardnumber=0, fc = 0, cn = 0;
 238         uint32_t blocks[5];
 239         uint8_t i;
 240         uint8_t bs[128];
 241         memset(bs, 0x00, sizeof(bs));
 242
 243         if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_pyramid_clone();
 244
 245         facilitycode = (fc & 0x000000FF);
 246         cardnumber = (cn & 0x0000FFFF);
 247
 248         if ( !GetPyramidBits(facilitycode, cardnumber, bs)) {
 249                 PrintAndLog("Error with tag bitstream generation.");
 250                 return 1;
 251         }
 252
 253         //Pyramid - compat mode, FSK2a, data rate 50, 4 data blocks
 254         blocks[0] = T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 4<<T55x7_MAXBLOCK_SHIFT;
 255
 256         if (param_getchar(Cmd, 3) == 'Q' || param_getchar(Cmd, 3) == 'q')
 257                 blocks[0] = T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | 50<<T5555_BITRATE_SHIFT | 4<<T5555_MAXBLOCK_SHIFT;
 258
 259         blocks[1] = bytebits_to_byte(bs,32);
 260         blocks[2] = bytebits_to_byte(bs+32,32);
 261         blocks[3] = bytebits_to_byte(bs+64,32);
 262         blocks[4] = bytebits_to_byte(bs+96,32);
 263
 264         PrintAndLog("Preparing to clone Farpointe/Pyramid to T55x7 with Facility Code: %u, Card Number: %u", facilitycode, cardnumber);
 265         PrintAndLog("Blk | Data ");
 266         PrintAndLog("----+------------");
 267         for ( i = 0; i<5; ++i )
 268                 PrintAndLog(" %02d | %08" PRIx32, i, blocks[i]);
 269
 270         UsbCommand resp;
 271         UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
 272
 273         for ( i = 0; i<5; ++i ) {
 274                 c.arg[0] = blocks[i];
 275                 c.arg[1] = i;
 276                 clearCommandBuffer();
 277                 SendCommand(&c);
 278                 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
 279                         PrintAndLog("Error occurred, device did not respond during write operation.");
 280                         return -1;
 281                 }
 282         }
 283         return 0;
 284 }
 285
 286 int CmdPyramidSim(const char *Cmd) {
 287
 288         char cmdp = param_getchar(Cmd, 0);
 289         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_pyramid_sim();
 290
 291         uint32_t facilitycode = 0, cardnumber = 0, fc = 0, cn = 0;
 292
 293         uint8_t bs[128];
 294         size_t size = sizeof(bs);
 295         memset(bs, 0x00, size);
 296
 297         // Pyramid uses:  fcHigh: 10, fcLow: 8, clk: 50, invert: 0
 298         uint64_t arg1, arg2;
 299         arg1 = (10 << 8) + 8;
 300         arg2 = 50 | 0;
 301
 302         if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_pyramid_sim();
 303
 304         facilitycode = (fc & 0x000000FF);
 305         cardnumber = (cn & 0x0000FFFF);
 306
 307         if ( !GetPyramidBits(facilitycode, cardnumber, bs)) {
 308                 PrintAndLog("Error with tag bitstream generation.");
 309                 return 1;
 310         }
 311
 312         PrintAndLog("Simulating Farpointe/Pyramid - Facility Code: %u, CardNumber: %u", facilitycode, cardnumber );
 313
 314         UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
 315         memcpy(c.d.asBytes, bs, size);
 316         clearCommandBuffer();
 317         SendCommand(&c);
 318         return 0;
 319 }
 320
 321 static command_t CommandTable[] = {
 322         {"help",  CmdHelp,            1, "This help"},
 323         {"demod", CmdFSKdemodPyramid, 1, "Demodulate a Pyramid FSK tag from the GraphBuffer"},
 324         {"read",  CmdPyramidRead,     0, "Attempt to read and extract tag data"},
 325         {"clone", CmdPyramidClone,    0, "<Facility-Code> <Card Number>  clone pyramid tag"},
 326         {"sim",   CmdPyramidSim,      0, "<Facility-Code> <Card Number>  simulate pyramid tag"},
 327         {NULL, NULL, 0, NULL}
 328 };
 329
 330 int CmdLFPyramid(const char *Cmd) {
 331         clearCommandBuffer();
 332         CmdsParse(CommandTable, Cmd);
 333         return 0;
 334 }
 335
 336 int CmdHelp(const char *Cmd) {
 337         CmdsHelp(CommandTable);
 338         return 0;
 339 }