git.zerfleddert.de Git - proxmark3-svn/blob

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

 #include "lfdemod.h"    // parityTest

24 #include "crc.h"

 static int CmdHelp(const char *Cmd);

 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 }

 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 }

58 // Works for 26bits.

 int GetPyramidBits(uint32_t fc, uint32_t cn, uint8_t *pyramidBits) {

61 uint8_t pre[128];

         memset(pre, 0x00, sizeof(pre));

64 // format start bit

         pre[79] = 1;

67 // Get 26 wiegand from FacilityCode, CardNumber

68 uint8_t wiegand[24];

         memset(wiegand, 0x00, sizeof(wiegand));

         num_to_bytebits(fc, 8, wiegand);

         num_to_bytebits(cn, 16, wiegand+8);

73 // add wiegand parity bits (dest, source, len)

         wiegand_add_parity(pre+80, wiegand, 24);

76 // add paritybits (bitsource, dest, sourcelen, paritylen, parityType (odd, even,)

         addParity(pre+8, pyramidBits+8, 102, 8, 1);

79 // add checksum

80 uint8_t csBuff[13];

         for (uint8_t i = 0; i < 13; i++)

                 csBuff[i] = bytebits_to_byte(pyramidBits + 16 + (i*8), 8);

         uint32_t crc = CRC8Maxim(csBuff, 13);

         num_to_bytebits(crc, 8, pyramidBits+120);

86 return 1;

87 }

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

 int CmdFSKdemodPyramid(const char *Cmd)

93 {

94 //raw fsk demod no manchester decoding no start bit finding just get binary from wave

         uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};

         size_t size = getFromGraphBuf(BitStream);

         if (size==0) return 0;

99 //get binary from fsk wave

         int idx = PyramiddemodFSK(BitStream, &size);

         if (idx < 0){

102 if (g_debugMode){

                         if (idx == -5)

104 PrintAndLog("DEBUG: Error - not enough samples");

                         else if (idx == -1)

106 PrintAndLog("DEBUG: Error - only noise found");

                         else if (idx == -2)

108 PrintAndLog("DEBUG: Error - problem during FSK demod");

                         else if (idx == -3)

                                 PrintAndLog("DEBUG: Error - Size not correct: %d", size);

                         else if (idx == -4)

112 PrintAndLog("DEBUG: Error - Pyramid preamble not found");

113 else

                                 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

         uint8_t checksum = bytebits_to_byte(BitStream + idx + 120, 8);

         uint8_t csBuff[14] = {0x00};

         for (uint8_t i = 0; i < 13; i++){

                 csBuff[i] = bytebits_to_byte(BitStream + idx + 16 + (i*8), 8);

144 }

145 //check checksum calc

146 //checksum calc thanks to ICEMAN!!

         uint32_t checkCS =  CRC8Maxim(csBuff,13);

148

149 //get raw ID before removing parities

         uint32_t rawLo = bytebits_to_byte(BitStream+idx+96,32);

         uint32_t rawHi = bytebits_to_byte(BitStream+idx+64,32);

         uint32_t rawHi2 = bytebits_to_byte(BitStream+idx+32,32);

         uint32_t rawHi3 = bytebits_to_byte(BitStream+idx,32);

         setDemodBuf(BitStream,128,idx);

         setClockGrid(g_DemodClock, g_DemodStartIdx + (idx*g_DemodClock));

156

         size = removeParity(BitStream, idx+8, 8, 1, 120);

         if (size != 105){

159 if (g_debugMode)

                         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;

         for (j=0; j<size; j++){

                 if(BitStream[j]) break;

191 }

         uint8_t fmtLen = size-j-8;

193 uint32_t fc = 0;

194 uint32_t cardnum = 0;

195 uint32_t code1 = 0;

         if (fmtLen==26){

                 fc = bytebits_to_byte(BitStream+73, 8);

                 cardnum = bytebits_to_byte(BitStream+81, 16);

                 code1 = bytebits_to_byte(BitStream+72,fmtLen);

                 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);

         } else if (fmtLen==45){

202 fmtLen=42; //end = 10 bits not 7 like 26 bit fmt

                 fc = bytebits_to_byte(BitStream+53, 10);

                 cardnum = bytebits_to_byte(BitStream+63, 32);

                 PrintAndLog("Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, rawHi3, rawHi2, rawHi, rawLo);

206 } else {

                 cardnum = bytebits_to_byte(BitStream+81, 16);

                 if (fmtLen>32){

209 //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen-32);

210 //code2 = bytebits_to_byte(BitStream+(size-32),32);

                         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);

                         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)

                 PrintAndLog("Checksum %02x passed", checksum);

219 else

                 PrintAndLog("Checksum %02x failed - should have been %02x", checksum, checkCS);

221

222 if (g_debugMode){

                 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128);

224 printDemodBuff();

225 }

226 return 1;

227 }

228

 int CmdPyramidRead(const char *Cmd) {

         lf_read(true, 15000);

         return CmdFSKdemodPyramid("");

232 }

233

 int CmdPyramidClone(const char *Cmd) {

235

         char cmdp = param_getchar(Cmd, 0);

         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_pyramid_clone();

238

         uint32_t facilitycode=0, cardnumber=0, fc = 0, cn = 0;

240 uint32_t blocks[5];

241 uint8_t i;

242 uint8_t bs[128];

         memset(bs, 0x00, sizeof(bs));

244

         if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_pyramid_clone();

246

247 facilitycode = (fc & 0x000000FF);

248 cardnumber = (cn & 0x0000FFFF);

249

         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

         blocks[0] = T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 4<<T55x7_MAXBLOCK_SHIFT;

257

         if (param_getchar(Cmd, 3) == 'Q' || param_getchar(Cmd, 3) == 'q')

                 blocks[0] = T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | 50<<T5555_BITRATE_SHIFT | 4<<T5555_MAXBLOCK_SHIFT;

260

         blocks[1] = bytebits_to_byte(bs,32);

         blocks[2] = bytebits_to_byte(bs+32,32);

         blocks[3] = bytebits_to_byte(bs+64,32);

         blocks[4] = bytebits_to_byte(bs+96,32);

265

         PrintAndLog("Preparing to clone Farpointe/Pyramid to T55x7 with Facility Code: %u, Card Number: %u", facilitycode, cardnumber);

267 PrintAndLog("Blk | Data ");

268 PrintAndLog("----+------------");

         for ( i = 0; i<5; ++i )

                 PrintAndLog(" %02d | %08" PRIx32, i, blocks[i]);

271

272 UsbCommand resp;

         UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};

274

         for ( i = 0; i<5; ++i ) {

                 c.arg[0] = blocks[i];

                 c.arg[1] = i;

278 clearCommandBuffer();

279 SendCommand(&c);

                 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

 int CmdPyramidSim(const char *Cmd) {

289

         char cmdp = param_getchar(Cmd, 0);

         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_pyramid_sim();

292

         uint32_t facilitycode = 0, cardnumber = 0, fc = 0, cn = 0;

294

295 uint8_t bs[128];

         size_t size = sizeof(bs);

         memset(bs, 0x00, size);

298

299 // Pyramid uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0

300 uint64_t arg1, arg2;

         arg1 = (10 << 8) + 8;

         arg2 = 50 | 0;

303

         if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_pyramid_sim();

305

306 facilitycode = (fc & 0x000000FF);

307 cardnumber = (cn & 0x0000FFFF);

308

         if ( !GetPyramidBits(facilitycode, cardnumber, bs)) {

310 PrintAndLog("Error with tag bitstream generation.");

311 return 1;

312 }

313

         PrintAndLog("Simulating Farpointe/Pyramid - Facility Code: %u, CardNumber: %u", facilitycode, cardnumber );

315

         UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};

         memcpy(c.d.asBytes, bs, size);

318 clearCommandBuffer();

319 SendCommand(&c);

320 return 0;

321 }

322

323 static command_t CommandTable[] = {

         {"help",  CmdHelp,            1, "This help"},

         {"demod", CmdFSKdemodPyramid, 1, "Demodulate a Pyramid FSK tag from the GraphBuffer"},

         {"read",  CmdPyramidRead,     0, "Attempt to read and extract tag data"},

         {"clone", CmdPyramidClone,    0, "<Facility-Code> <Card Number>  clone pyramid tag"},

         {"sim",   CmdPyramidSim,      0, "<Facility-Code> <Card Number>  simulate pyramid tag"},

         {NULL, NULL, 0, NULL}

330 };

331

 int CmdLFPyramid(const char *Cmd) {

333 clearCommandBuffer();

334 CmdsParse(CommandTable, Cmd);

335 return 0;

336 }

337

 int CmdHelp(const char *Cmd) {

339 CmdsHelp(CommandTable);

340 return 0;

341 }