git.zerfleddert.de Git - proxmark3-svn/blob - client/cmdlfawid.c

   1 //-----------------------------------------------------------------------------
   2 // Authored by Craig Young <cyoung@tripwire.com> based on cmdlfhid.c structure
   3 //
   4 // cmdlfhid.c is Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
   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 //-----------------------------------------------------------------------------
  13
  14 #include "cmdlfawid.h"
  15
  16 #include <string.h>
  17 #include <stdio.h>      // sscanf
  18 #include "comms.h"      // Definitions, USB controls, etc
  19 #include "ui.h"         // PrintAndLog
  20 #include "cmdparser.h"  // CmdsParse, CmdsHelp
  21 #include "lfdemod.h"    // parityTest +
  22 #include "util.h"       // weigandparity
  23 #include "protocols.h"  // for T55xx config register definitions
  24 #include "cmddata.h"    // for printDemod and demodbuffer commands
  25 #include "graph.h"      // for getFromGraphBuff cmds
  26 #include "cmdmain.h"
  27
  28 static int CmdHelp(const char *Cmd);
  29
  30 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 }
  43
  44 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 }
  57
  58 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 }
  72
  73 int CmdAWIDReadFSK(const char *Cmd) {
  74         int findone=0;
  75         if (Cmd[0] == 'h' || Cmd[0] == 'H') return usage_lf_awid_read();
  76         if (Cmd[0] == '1') findone = 1;
  77
  78         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
  86 int CmdFSKdemodAWID(const char *Cmd)
  87 {
  88         uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
  89         size_t size = getFromGraphBuf(BitStream);
  90         if (size==0) return 0;
  91
  92         int waveIdx = 0;
  93         //get binary from fsk wave
  94         int idx = AWIDdemodFSK(BitStream, &size, &waveIdx);
  95         if (idx<=0){
  96                 if (g_debugMode){
  97                         if (idx == -1)
  98                                 PrintAndLog("DEBUG: Error - not enough samples");
  99                         else if (idx == -2)
 100                                 PrintAndLog("DEBUG: Error - only noise found");
 101                         else if (idx == -3)
 102                                 PrintAndLog("DEBUG: Error - problem during FSK demod");
 103                         else if (idx == -4)
 104                                 PrintAndLog("DEBUG: Error - AWID preamble not found");
 105                         else if (idx == -5)
 106                                 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
 107                         else
 108                                 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
 127         uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
 128         uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
 129         uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
 130         setDemodBuf(BitStream,96,idx);
 131         setClockGrid(50, waveIdx + (idx*50));
 132
 133         size = removeParity(BitStream, idx+8, 4, 1, 88);
 134         if (size != 66){
 135                 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;
 157         uint8_t fmtLen = bytebits_to_byte(BitStream,8);
 158         if (fmtLen==26){
 159                 fc = bytebits_to_byte(BitStream+9, 8);
 160                 cardnum = bytebits_to_byte(BitStream+17, 16);
 161                 code1 = bytebits_to_byte(BitStream+8,fmtLen);
 162                 PrintAndLog("AWID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi2, rawHi, rawLo);
 163         } else {
 164                 cardnum = bytebits_to_byte(BitStream+8+(fmtLen-17), 16);
 165                 if (fmtLen>32){
 166                         code1 = bytebits_to_byte(BitStream+8,fmtLen-32);
 167                         code2 = bytebits_to_byte(BitStream+8+(fmtLen-32),32);
 168                         PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, code2, rawHi2, rawHi, rawLo);
 169                 } else{
 170                         code1 = bytebits_to_byte(BitStream+8,fmtLen);
 171                         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){
 175                 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
 183 int getAWIDBits(uint32_t fc, uint32_t cn, uint8_t       *AWIDBits) {
 184         uint8_t pre[66];
 185         memset(pre, 0, sizeof(pre));
 186         AWIDBits[7]=1;
 187         num_to_bytebits(26, 8, pre);
 188
 189         uint8_t wiegand[24];
 190         num_to_bytebits(fc, 8, wiegand);
 191         num_to_bytebits(cn, 16, wiegand+8);
 192
 193         wiegand_add_parity(pre+8, wiegand, 24);
 194
 195         size_t bitLen = addParity(pre, AWIDBits+8, 66, 4, 1);
 196         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
 203 int CmdAWIDSim(const char *Cmd) {
 204         uint32_t fcode = 0, cnum = 0, fc=0, cn=0;
 205         uint8_t BitStream[96];
 206         uint8_t *bs = BitStream;
 207         size_t size = sizeof(BitStream);
 208         memset(bs, 0, size);
 209
 210         uint64_t arg1 = (10<<8) + 8; // fcHigh = 10, fcLow = 8
 211         uint64_t arg2 = 50; // clk RF/50 invert=0
 212
 213         if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_awid_sim();
 214
 215         fcode = (fc & 0x000000FF);
 216         cnum = (cn & 0x0000FFFF);
 217
 218         if (fc != fcode) PrintAndLog("Facility-Code (%u) truncated to 8-bits: %u",fc,fcode);
 219         if (cn != cnum) PrintAndLog("Card number (%u) truncated to 16-bits: %u",cn,cnum);
 220
 221         PrintAndLog("Emulating AWID26 -- FC: %u; CN: %u\n",fcode,cnum);
 222         PrintAndLog("Press pm3-button to abort simulation or run another command");
 223
 224         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
 229         UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
 230         memcpy(c.d.asBytes, bs, size);
 231         clearCommandBuffer();
 232         SendCommand(&c);
 233         return 0;
 234 }
 235
 236 int CmdAWIDClone(const char *Cmd) {
 237         uint32_t blocks[4] = {T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 3<<T55x7_MAXBLOCK_SHIFT, 0, 0, 0};
 238         uint32_t fc=0,cn=0;
 239         uint8_t BitStream[96];
 240         uint8_t *bs=BitStream;
 241         memset(bs,0,sizeof(BitStream));
 242
 243         if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_awid_clone();
 244
 245         if (param_getchar(Cmd, 3) == 'Q' || param_getchar(Cmd, 3) == 'q')
 246                 blocks[0] = T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | ((50-2)>>1)<<T5555_BITRATE_SHIFT | 3<<T5555_MAXBLOCK_SHIFT;
 247
 248         if ((fc & 0xFF) != fc) {
 249                 fc &= 0xFF;
 250                 PrintAndLog("Facility-Code Truncated to 8-bits (AWID26): %u", fc);
 251         }
 252         if ((cn & 0xFFFF) != cn) {
 253                 cn &= 0xFFFF;
 254                 PrintAndLog("Card Number Truncated to 16-bits (AWID26): %u", cn);
 255         }
 256
 257         if ( !getAWIDBits(fc, cn, bs)) {
 258                 PrintAndLog("Error with tag bitstream generation.");
 259                 return 1;
 260         }
 261
 262         blocks[1] = bytebits_to_byte(bs,32);
 263         blocks[2] = bytebits_to_byte(bs+32,32);
 264         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("----+------------");
 270         PrintAndLog(" 00 | 0x%08x", blocks[0]);
 271         PrintAndLog(" 01 | 0x%08x", blocks[1]);
 272         PrintAndLog(" 02 | 0x%08x", blocks[2]);
 273         PrintAndLog(" 03 | 0x%08x", blocks[3]);
 274
 275         UsbCommand resp;
 276         UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
 277
 278         for (uint8_t i=0; i<4; i++) {
 279                 c.cmd = CMD_T55XX_WRITE_BLOCK;
 280                 c.arg[0] = blocks[i];
 281                 c.arg[1] = i;
 282                 c.arg[2] = 0;
 283                 clearCommandBuffer();
 284                 SendCommand(&c);
 285                 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[] = {
 295         {"help",      CmdHelp,         1, "This help"},
 296         {"demod",     CmdFSKdemodAWID, 1, "Demodulate an AWID FSK tag from the GraphBuffer"},
 297         {"read",      CmdAWIDReadFSK,  0, "['1'] Realtime AWID FSK read from the antenna (option '1' for one tag only)"},
 298         {"sim",       CmdAWIDSim,      0, "<Facility-Code> <Card Number> -- AWID tag simulator"},
 299         {"clone",     CmdAWIDClone,    0, "<Facility-Code> <Card Number> <Q5> -- Clone AWID to T55x7 (tag must be in range of antenna)"},
 300         {NULL, NULL, 0, NULL}
 301 };
 302
 303 int CmdLFAWID(const char *Cmd) {
 304         CmdsParse(CommandTable, Cmd);
 305         return 0;
 306 }
 307
 308 int CmdHelp(const char *Cmd) {
 309         CmdsHelp(CommandTable);
 310         return 0;
 311 }