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

1 //-----------------------------------------------------------------------------

2 // Authored by Craig Young <cyoung@tripwire.com> based on cmdlfhid.c structure

3 //

5 //

6 // This code is licensed to you under the terms of the GNU GPL, version 2 or,

7 // at your option, any later version. See the LICENSE.txt file for the text of

8 // the license.

9 //-----------------------------------------------------------------------------

10 // Low frequency AWID26 commands

11 // FSK2a, RF/50, 96 bits (complete)

12 //-----------------------------------------------------------------------------

14 #include <string.h>

15 #include <stdio.h> // sscanf

 #include "proxmark3.h"  // Definitions, USB controls, etc

17 #include "cmdlfawid.h"

18 #include "ui.h" // PrintAndLog

 #include "cmdparser.h"  // CmdsParse, CmdsHelp

 #include "lfdemod.h"    // parityTest +

 #include "util.h"       // weigandparity

 #include "protocols.h"  // for T55xx config register definitions

 #include "cmddata.h"    // for printDemod and demodbuffer commands

 #include "graph.h"      // for getFromGraphBuff cmds

25 #include "cmdmain.h"

 static int CmdHelp(const char *Cmd);

 int usage_lf_awid_read(void) {

30 PrintAndLog("Enables AWID26 compatible reader mode printing details of scanned AWID26 tags.");

31 PrintAndLog("By default, values are printed and logged until the button is pressed or another USB command is issued.");

32 PrintAndLog("If the ['1'] option is provided, reader mode is exited after reading a single AWID26 card.");

33 PrintAndLog("");

34 PrintAndLog("Usage: lf awid read ['1']");

35 PrintAndLog("Options : ");

36 PrintAndLog(" 1 : (optional) stop after reading a single card");

37 PrintAndLog("");

38 PrintAndLog("Samples : lf awid read");

39 PrintAndLog(" : lf awid read 1");

40 return 0;

41 }

 int usage_lf_awid_sim(void) {

44 PrintAndLog("Enables simulation of AWID26 card with specified facility-code and card number.");

45 PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");

46 PrintAndLog("Per AWID26 format, the facility-code is 8-bit and the card number is 16-bit. Larger values are truncated.");

47 PrintAndLog("");

48 PrintAndLog("Usage: lf awid sim <Facility-Code> <Card-Number>");

49 PrintAndLog("Options : ");

50 PrintAndLog(" <Facility-Code> : 8-bit value representing the AWID facility code");

51 PrintAndLog(" <Card Number> : 16-bit value representing the AWID card number");

52 PrintAndLog("");

53 PrintAndLog("Sample : lf awid sim 224 1337");

54 return 0;

55 }

 int usage_lf_awid_clone(void) {

58 PrintAndLog("Enables cloning of AWID26 card with specified facility-code and card number onto T55x7.");

59 PrintAndLog("The T55x7 must be on the antenna when issuing this command. T55x7 blocks are calculated and printed in the process.");

60 PrintAndLog("Per AWID26 format, the facility-code is 8-bit and the card number is 16-bit. Larger values are truncated.");

61 PrintAndLog("");

62 PrintAndLog("Usage: lf awid clone <Facility-Code> <Card-Number>");

63 PrintAndLog("Options : ");

64 PrintAndLog(" <Facility-Code> : 8-bit value representing the AWID facility code");

65 PrintAndLog(" <Card Number> : 16-bit value representing the AWID card number");

66 PrintAndLog(" Q5 : optional - clone to Q5 (T5555) instead of T55x7 chip");

67 PrintAndLog("");

68 PrintAndLog("Sample : lf awid clone 224 1337");

69 return 0;

70 }

 int CmdAWIDReadFSK(const char *Cmd) {

73 int findone=0;

         if (Cmd[0] == 'h' || Cmd[0] == 'H') return usage_lf_awid_read();

         if (Cmd[0] == '1') findone = 1;

         UsbCommand c = {CMD_AWID_DEMOD_FSK, {findone, 0, 0}};

78 clearCommandBuffer();

79 SendCommand(&c);

80 return 0;

81 }

82 //by marshmellow

83 //AWID Prox demod - FSK RF/50 with preamble of 00000001 (always a 96 bit data stream)

84 //print full AWID Prox ID and some bit format details if found

 int CmdFSKdemodAWID(const char *Cmd)

86 {

         uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};

         size_t size = getFromGraphBuf(BitStream);

         if (size==0) return 0;

91 int waveIdx = 0;

92 //get binary from fsk wave

         int idx = AWIDdemodFSK(BitStream, &size, &waveIdx);

         if (idx<=0){

95 if (g_debugMode){

                         if (idx == -1)

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

                         else if (idx == -2)

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

                         else if (idx == -3)

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

                         else if (idx == -4)

103 PrintAndLog("DEBUG: Error - AWID preamble not found");

                         else if (idx == -5)

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

106 else

                                 PrintAndLog("DEBUG: Error %d",idx);

108 }

109 return 0;

110 }

111

112 // Index map

113 // 0 10 20 30 40 50 60

114 // | | | | | | |

115 // 01234567 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 - to 96

116 // -----------------------------------------------------------------------------

117 // 00000001 000 1 110 1 101 1 011 1 101 1 010 0 000 1 000 1 010 0 001 0 110 1 100 0 000 1 000 1

118 // premable bbb o bbb o bbw o fff o fff o ffc o ccc o ccc o ccc o ccc o ccc o wxx o xxx o xxx o - to 96

119 // |---26 bit---| |-----117----||-------------142-------------|

120 // b = format bit len, o = odd parity of last 3 bits

121 // f = facility code, c = card number

122 // w = wiegand parity

123 // (26 bit format shown)

124

125 //get raw ID before removing parities

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

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

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

         setDemodBuf(BitStream,96,idx);

         setClockGrid(50, waveIdx + (idx*50));

131

         size = removeParity(BitStream, idx+8, 4, 1, 88);

         if (size != 66){

                 if (g_debugMode) PrintAndLog("DEBUG: Error - at parity check-tag size does not match AWID format");

135 return 0;

136 }

137 // ok valid card found!

138

139 // Index map

140 // 0 10 20 30 40 50 60

141 // | | | | | | |

142 // 01234567 8 90123456 7890123456789012 3 456789012345678901234567890123456

143 // -----------------------------------------------------------------------------

144 // 00011010 1 01110101 0000000010001110 1 000000000000000000000000000000000

145 // bbbbbbbb w ffffffff cccccccccccccccc w xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

146 // |26 bit| |-117--| |-----142------|

147 // b = format bit len, o = odd parity of last 3 bits

148 // f = facility code, c = card number

149 // w = wiegand parity

150 // (26 bit format shown)

151

152 uint32_t fc = 0;

153 uint32_t cardnum = 0;

154 uint32_t code1 = 0;

155 uint32_t code2 = 0;

         uint8_t fmtLen = bytebits_to_byte(BitStream,8);

         if (fmtLen==26){

                 fc = bytebits_to_byte(BitStream+9, 8);

                 cardnum = bytebits_to_byte(BitStream+17, 16);

                 code1 = bytebits_to_byte(BitStream+8,fmtLen);

                 PrintAndLog("AWID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi2, rawHi, rawLo);

162 } else {

                 cardnum = bytebits_to_byte(BitStream+8+(fmtLen-17), 16);

                 if (fmtLen>32){

                         code1 = bytebits_to_byte(BitStream+8,fmtLen-32);

                         code2 = bytebits_to_byte(BitStream+8+(fmtLen-32),32);

                         PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, code2, rawHi2, rawHi, rawLo);

168 } else{

                         code1 = bytebits_to_byte(BitStream+8,fmtLen);

                         PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, rawHi2, rawHi, rawLo);

171 }

172 }

173 if (g_debugMode){

                 PrintAndLog("DEBUG: idx: %d, Len: %d Printing Demod Buffer:", idx, 96);

175 printDemodBuff();

176 }

177 //todo - convert hi2, hi, lo to demodbuffer for future sim/clone commands

178 return 1;

179 }

180

181 //refactored by marshmellow

 int getAWIDBits(uint32_t fc, uint32_t cn, uint8_t       *AWIDBits) {

183 uint8_t pre[66];

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

         AWIDBits[7]=1;

         num_to_bytebits(26, 8, pre);

187

188 uint8_t wiegand[24];

         num_to_bytebits(fc, 8, wiegand);

         num_to_bytebits(cn, 16, wiegand+8);

191

         wiegand_add_parity(pre+8, wiegand, 24);

193

         size_t bitLen = addParity(pre, AWIDBits+8, 66, 4, 1);

         if (bitLen != 88) return 0;

196 //for (uint8_t i = 0; i<3; i++){

197 // PrintAndLog("DEBUG: %08X", bytebits_to_byte(AWIDBits+(32*i),32));

198 //}

199 return 1;

200 }

201

 int CmdAWIDSim(const char *Cmd) {

         uint32_t fcode = 0, cnum = 0, fc=0, cn=0;

204 uint8_t BitStream[96];

205 uint8_t *bs = BitStream;

         size_t size = sizeof(BitStream);

         memset(bs, 0, size);

208

         uint64_t arg1 = (10<<8) + 8; // fcHigh = 10, fcLow = 8

         uint64_t arg2 = 50; // clk RF/50 invert=0

211

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

213

214 fcode = (fc & 0x000000FF);

215 cnum = (cn & 0x0000FFFF);

216

         if (fc != fcode) PrintAndLog("Facility-Code (%u) truncated to 8-bits: %u",fc,fcode);

         if (cn != cnum) PrintAndLog("Card number (%u) truncated to 16-bits: %u",cn,cnum);

219

         PrintAndLog("Emulating AWID26 -- FC: %u; CN: %u\n",fcode,cnum);

221 PrintAndLog("Press pm3-button to abort simulation or run another command");

222

         if (!getAWIDBits(fc, cn, bs)) {

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

225 return 1;

226 }

227 // AWID uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0

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

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

230 clearCommandBuffer();

231 SendCommand(&c);

232 return 0;

233 }

234

 int CmdAWIDClone(const char *Cmd) {

         uint32_t blocks[4] = {T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 3<<T55x7_MAXBLOCK_SHIFT, 0, 0, 0};

         uint32_t fc=0,cn=0;

238 uint8_t BitStream[96];

239 uint8_t *bs=BitStream;

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

241

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

243

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

                 blocks[0] = T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | ((50-2)>>1)<<T5555_BITRATE_SHIFT | 3<<T5555_MAXBLOCK_SHIFT;

246

         if ((fc & 0xFF) != fc) {

248 fc &= 0xFF;

                 PrintAndLog("Facility-Code Truncated to 8-bits (AWID26): %u", fc);

250 }

         if ((cn & 0xFFFF) != cn) {

252 cn &= 0xFFFF;

                 PrintAndLog("Card Number Truncated to 16-bits (AWID26): %u", cn);

254 }

255

         if ( !getAWIDBits(fc, cn, bs)) {

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

258 return 1;

259 }

260

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

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

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

264

265 PrintAndLog("Preparing to clone AWID26 to T55x7 with FC: %u, CN: %u",

266 fc, cn);

267 PrintAndLog("Blk | Data ");

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

         PrintAndLog(" 00 | 0x%08x", blocks[0]);

         PrintAndLog(" 01 | 0x%08x", blocks[1]);

         PrintAndLog(" 02 | 0x%08x", blocks[2]);

         PrintAndLog(" 03 | 0x%08x", blocks[3]);

273

274 UsbCommand resp;

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

276

         for (uint8_t i=0; i<4; i++) {

278 c.cmd = CMD_T55XX_WRITE_BLOCK;

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

                 c.arg[1] = i;

                 c.arg[2] = 0;

282 clearCommandBuffer();

283 SendCommand(&c);

                 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){

285 PrintAndLog("Error occurred, device did not respond during write operation.");

286 return -1;

287 }

288

289 }

290 return 0;

291 }

292

293 static command_t CommandTable[] = {

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

         {"demod",     CmdFSKdemodAWID, 1, "Demodulate an AWID FSK tag from the GraphBuffer"},

         {"read",      CmdAWIDReadFSK,  0, "['1'] Realtime AWID FSK read from the antenna (option '1' for one tag only)"},

         {"sim",       CmdAWIDSim,      0, "<Facility-Code> <Card Number> -- AWID tag simulator"},

         {"clone",     CmdAWIDClone,    0, "<Facility-Code> <Card Number> <Q5> -- Clone AWID to T55x7 (tag must be in range of antenna)"},

         {NULL, NULL, 0, NULL}

300 };

301

 int CmdLFAWID(const char *Cmd) {

303 CmdsParse(CommandTable, Cmd);

304 return 0;

305 }

306

 int CmdHelp(const char *Cmd) {

308 CmdsHelp(CommandTable);

309 return 0;

310 }