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 "cmdlfawid.h"

16 #include <string.h>

17 #include <stdio.h> // sscanf

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

 #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

26 #include "cmdmain.h"

 static int CmdHelp(const char *Cmd);

 int usage_lf_awid_read(void) {

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

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

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

34 PrintAndLog("");

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

36 PrintAndLog("Options : ");

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

38 PrintAndLog("");

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

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

41 return 0;

42 }

 int usage_lf_awid_sim(void) {

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

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

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

48 PrintAndLog("");

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

50 PrintAndLog("Options : ");

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

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

53 PrintAndLog("");

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

55 return 0;

56 }

 int usage_lf_awid_clone(void) {

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

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

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

62 PrintAndLog("");

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

64 PrintAndLog("Options : ");

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

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

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

68 PrintAndLog("");

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

70 return 0;

71 }

 int CmdAWIDReadFSK(const char *Cmd) {

74 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}};

79 clearCommandBuffer();

80 SendCommand(&c);

81 return 0;

82 }

83 //by marshmellow

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

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

 int CmdFSKdemodAWID(const char *Cmd)

87 {

         uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};

         size_t size = getFromGraphBuf(BitStream);

         if (size==0) return 0;

92 int waveIdx = 0;

93 //get binary from fsk wave

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

         if (idx<=0){

96 if (g_debugMode){

                         if (idx == -1)

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

                         else if (idx == -2)

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

                         else if (idx == -3)

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

                         else if (idx == -4)

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

                         else if (idx == -5)

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

107 else

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

109 }

110 return 0;

111 }

112

113 // Index map

114 // 0 10 20 30 40 50 60

115 // | | | | | | |

116 // 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

117 // -----------------------------------------------------------------------------

118 // 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

119 // 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

120 // |---26 bit---| |-----117----||-------------142-------------|

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

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

123 // w = wiegand parity

124 // (26 bit format shown)

125

126 //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));

132

         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");

136 return 0;

137 }

138 // ok valid card found!

139

140 // Index map

141 // 0 10 20 30 40 50 60

142 // | | | | | | |

143 // 01234567 8 90123456 7890123456789012 3 456789012345678901234567890123456

144 // -----------------------------------------------------------------------------

145 // 00011010 1 01110101 0000000010001110 1 000000000000000000000000000000000

146 // bbbbbbbb w ffffffff cccccccccccccccc w xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

147 // |26 bit| |-117--| |-----142------|

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

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

150 // w = wiegand parity

151 // (26 bit format shown)

152

153 uint32_t fc = 0;

154 uint32_t cardnum = 0;

155 uint32_t code1 = 0;

156 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);

163 } 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);

169 } 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);

172 }

173 }

174 if (g_debugMode){

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

176 printDemodBuff();

177 }

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

179 return 1;

180 }

181

182 //refactored by marshmellow

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

184 uint8_t pre[66];

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

         AWIDBits[7]=1;

         num_to_bytebits(26, 8, pre);

188

189 uint8_t wiegand[24];

         num_to_bytebits(fc, 8, wiegand);

         num_to_bytebits(cn, 16, wiegand+8);

192

         wiegand_add_parity(pre+8, wiegand, 24);

194

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

         if (bitLen != 88) return 0;

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

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

199 //}

200 return 1;

201 }

202

 int CmdAWIDSim(const char *Cmd) {

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

205 uint8_t BitStream[96];

206 uint8_t *bs = BitStream;

         size_t size = sizeof(BitStream);

         memset(bs, 0, size);

209

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

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

212

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

214

215 fcode = (fc & 0x000000FF);

216 cnum = (cn & 0x0000FFFF);

217

         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);

220

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

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

223

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

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

226 return 1;

227 }

228 // 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);

231 clearCommandBuffer();

232 SendCommand(&c);

233 return 0;

234 }

235

 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;

239 uint8_t BitStream[96];

240 uint8_t *bs=BitStream;

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

242

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

244

         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;

247

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

249 fc &= 0xFF;

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

251 }

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

253 cn &= 0xFFFF;

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

255 }

256

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

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

259 return 1;

260 }

261

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

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

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

265

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

267 fc, cn);

268 PrintAndLog("Blk | Data ");

269 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]);

274

275 UsbCommand resp;

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

277

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

279 c.cmd = CMD_T55XX_WRITE_BLOCK;

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

                 c.arg[1] = i;

                 c.arg[2] = 0;

283 clearCommandBuffer();

284 SendCommand(&c);

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

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

287 return -1;

288 }

289

290 }

291 return 0;

292 }

293

294 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}

301 };

302

 int CmdLFAWID(const char *Cmd) {

304 CmdsParse(CommandTable, Cmd);

305 return 0;

306 }

307

 int CmdHelp(const char *Cmd) {

309 CmdsHelp(CommandTable);

310 return 0;

311 }