cvs.zerfleddert.de Git - proxmark3-svn/blob - client/cmdlfnedap.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 NEDAP tag commands
   8 //-----------------------------------------------------------------------------
   9 #include <string.h>
  10 #include <inttypes.h>
  11 #include "cmdlfnedap.h"
  12 static int CmdHelp(const char *Cmd);
  13
  14 int usage_lf_nedap_clone(void){
  15         PrintAndLog("clone a NEDAP tag to a T55x7 tag.");
  16         PrintAndLog("");
  17         PrintAndLog("Usage: lf nedap clone <Card-Number>");
  18         PrintAndLog("Options :");
  19         PrintAndLog("  <Card Number>   : 24-bit value card number");
  20 //      PrintAndLog("  Q5              : optional - clone to Q5 (T5555) instead of T55x7 chip");
  21         PrintAndLog("");
  22         PrintAndLog("Sample  : lf nedap clone 112233");
  23         return 0;
  24 }
  25
  26 int usage_lf_nedap_sim(void) {
  27         PrintAndLog("Enables simulation of NEDAP card with specified card number.");
  28         PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
  29         PrintAndLog("");
  30         PrintAndLog("Usage:  lf nedap sim <Card-Number>");
  31         PrintAndLog("Options :");
  32         PrintAndLog("  <Card Number>   : 24-bit value card number");
  33         PrintAndLog("");
  34         PrintAndLog("Sample  : lf nedap sim 112233");
  35         return 0;
  36 }
  37
  38 int GetNedapBits(uint32_t cn, uint8_t *nedapBits) {
  39
  40         uint8_t pre[128];
  41         memset(pre, 0x00, sizeof(pre));
  42
  43         // preamble  1111 1111 10 = 0XF8
  44         num_to_bytebits(0xF8, 10, pre);
  45
  46         // fixed tagtype code?  0010 1101 = 0x2D
  47         num_to_bytebits(0x2D, 8, pre+10);
  48
  49         // 46 encrypted bits - UNKNOWN ALGO
  50         //    -- 16 bits checksum. Should be 4x4 checksum,  based on UID and 2 constant values.
  51         //    -- 30 bits undocumented?
  52         num_to_bytebits(cn, 46, pre+18);
  53
  54         //----from this part, the UID in clear text, with a 1bit ZERO as separator between bytes.
  55         pre[64] = 0;
  56
  57         // cardnumber (uid)
  58         num_to_bytebits(cn, 24, pre+64);
  59
  60         pre[73] = 0;
  61         pre[82] = 0;
  62         pre[91] = 0;
  63         pre[100] = 0;
  64         pre[109] = 0;
  65         pre[118] = 0;
  66
  67         // add paritybits       (bitsource, dest, sourcelen, paritylen, parityType (odd, even,)
  68         addParity(pre+64, pre+64, 128, 8, 1);
  69
  70 //1111111110001011010000010110100011001001000010110101001101011001000110011010010000000000100001110001001000000001000101011100111
  71         return 1;
  72 }
  73 /*
  74  - UID: 001630
  75  - i: 4071
  76  - Checksum2 BE21
  77 */
  78 //GetParity( uint8_t *bits, uint8_t type, int length)
  79
  80 //NEDAP demod - ASK/Biphase (or Diphase),  RF/64 with preamble of 1111111110  (always a 128 bit data stream)
  81 //print NEDAP Prox ID, encoding, encrypted ID,
  82
  83 int CmdLFNedapDemod(const char *Cmd) {
  84         //raw ask demod no start bit finding just get binary from wave
  85         uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
  86         size_t size = getFromGraphBuf(BitStream);
  87         if (size==0) return 0;
  88
  89         //get binary from ask wave
  90         if (!ASKbiphaseDemod("0 64 0 0", FALSE)) {
  91                 if (g_debugMode) PrintAndLog("Error NEDAP: ASKbiphaseDemod failed");
  92                 return 0;
  93         }
  94         size = DemodBufferLen;
  95         int idx = NedapDemod(DemodBuffer, &size);
  96         if (idx < 0){
  97                 if (g_debugMode){
  98                         // if (idx == -5)
  99                                 // PrintAndLog("DEBUG: Error - not enough samples");
 100                         // else if (idx == -1)
 101                                 // PrintAndLog("DEBUG: Error - only noise found");
 102                         // else if (idx == -2)
 103                                 // PrintAndLog("DEBUG: Error - problem during ASK/Biphase demod");
 104                         if (idx == -3)
 105                                 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
 106                         else if (idx == -4)
 107                                 PrintAndLog("DEBUG: Error - NEDAP preamble not found");
 108                         else
 109                                 PrintAndLog("DEBUG: Error - idx: %d",idx);
 110                 }
 111                 return 0;
 112         }
 113
 114 /* Index map                                                      E                                                                              E
 115  preamble    enc tag type         encrypted uid                   P d    33    d    90    d    04    d    71    d    40    d    45    d    E7    P
 116  1111111110 00101101000001011010001100100100001011010100110101100 1 0 00110011 0 10010000 0 00000100 0 01110001 0 01000000 0 01000101 0 11100111 1
 117                                                                          uid2       uid1       uid0         I          I          R           R
 118  1111111110 00101101000001011010001100100100001011010100110101100 1
 119
 120  0 00110011
 121  0 10010000
 122  0 00000100
 123  0 01110001
 124  0 01000000
 125  0 01000101
 126  0 11100111
 127  1
 128
 129          Tag ID is 049033
 130          I = Identical on all tags
 131          R = Random ?
 132          UID2, UID1, UID0 == card number
 133
 134 */
 135         //get raw ID before removing parities
 136         uint32_t raw[4] = {0,0,0,0};
 137         raw[0] = bytebits_to_byte(DemodBuffer+idx+96,32);
 138         raw[1] = bytebits_to_byte(DemodBuffer+idx+64,32);
 139         raw[2] = bytebits_to_byte(DemodBuffer+idx+32,32);
 140         raw[3] = bytebits_to_byte(DemodBuffer+idx,32);
 141         setDemodBuf(DemodBuffer,128,idx);
 142
 143         uint8_t firstParity = GetParity( DemodBuffer, EVEN, 63);
 144         if ( firstParity != DemodBuffer[63]  ) {
 145                 PrintAndLog("1st 64bit parity check failed:  %d|%d ", DemodBuffer[63], firstParity);
 146                 //return 0;
 147         }
 148
 149         uint8_t secondParity = GetParity( DemodBuffer+64, EVEN, 63);
 150         if ( secondParity != DemodBuffer[127]  ) {
 151                 PrintAndLog("2st 64bit parity check failed:  %d|%d ", DemodBuffer[127], secondParity);
 152                 //return 0;
 153         }
 154
 155         // ok valid card found!
 156         uint32_t uid = 0;
 157         uid =  bytebits_to_byte(DemodBuffer+65, 8);
 158         uid |= bytebits_to_byte(DemodBuffer+74, 8) << 8;
 159         uid |= bytebits_to_byte(DemodBuffer+83, 8) << 16;
 160
 161         uint16_t two = 0;
 162         two =  bytebits_to_byte(DemodBuffer+92, 8);
 163         two |= bytebits_to_byte(DemodBuffer+101, 8) << 8;
 164
 165         uint16_t chksum2 = 0;
 166         chksum2 =  bytebits_to_byte(DemodBuffer+110, 8);
 167         chksum2 |= bytebits_to_byte(DemodBuffer+119, 8) << 8;
 168
 169         PrintAndLog("NEDAP ID Found - Raw: %08x%08x%08x%08x", raw[3], raw[2], raw[1], raw[0]);
 170         PrintAndLog(" - UID: %06X", uid);
 171         PrintAndLog(" - i: %04X", two);
 172         PrintAndLog(" - Checksum2 %04X", chksum2);
 173
 174         if (g_debugMode){
 175                 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128);
 176                 printDemodBuff();
 177                 PrintAndLog("BIN:\n%s", sprint_bin_break( DemodBuffer, 128, 64) );
 178         }
 179
 180         return 1;
 181 }
 182 /*
 183 configuration
 184 lf t55xx wr b 0 d 00170082
 185
 186 1) uid 049033
 187 lf t55 wr b 1 d FF8B4168
 188 lf t55 wr b 2 d C90B5359
 189 lf t55 wr b 3 d 19A40087
 190 lf t55 wr b 4 d 120115CF
 191
 192 2) uid 001630
 193 lf t55 wr b 1 d FF8B6B20
 194 lf t55 wr b 2 d F19B84A3
 195 lf t55 wr b 3 d 18058007
 196 lf t55 wr b 4 d 1200857C
 197
 198 3) uid 39feff
 199 lf t55xx wr b 1 d ffbfa73e
 200 lf t55xx wr b 2 d 4c0003ff
 201 lf t55xx wr b 3 d ffbfa73e
 202 lf t55xx wr b 4 d 4c0003ff
 203
 204 */
 205
 206 int CmdLFNedapRead(const char *Cmd) {
 207         CmdLFRead("s");
 208         getSamples("30000",false);
 209         return CmdLFNedapDemod("");
 210 }
 211 /*
 212 int CmdLFNedapClone(const char *Cmd) {
 213
 214         char cmdp = param_getchar(Cmd, 0);
 215         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_nedap_clone();
 216
 217         uint32_t cardnumber=0, cn = 0;
 218         uint32_t blocks[5];
 219         uint8_t i;
 220         uint8_t bs[128];
 221         memset(bs, 0x00, sizeof(bs));
 222
 223         if (sscanf(Cmd, "%u", &cn ) != 1) return usage_lf_nedap_clone();
 224
 225         cardnumber = (cn & 0x00FFFFFF);
 226
 227         if ( !GetNedapBits(cardnumber, bs)) {
 228                 PrintAndLog("Error with tag bitstream generation.");
 229                 return 1;
 230         }
 231
 232         ((ASK/biphase   data rawdemod ab 0 64 1 0
 233         //NEDAP - compat mode, ASK/Biphase, data rate 64, 4 data blocks
 234         blocks[0] = T55x7_MODULATION_BIPHASE | T55x7_BITRATE_RF_64 | 4<<T55x7_MAXBLOCK_SHIFT;
 235
 236         if (param_getchar(Cmd, 3) == 'Q' || param_getchar(Cmd, 3) == 'q')
 237                 //t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
 238                 blocks[0] = T5555_MODULATION_BIPHASE | T5555_INVERT_OUTPUT | 64<<T5555_BITRATE_SHIFT | 4<<T5555_MAXBLOCK_SHIFT;
 239
 240         blocks[1] = bytebits_to_byte(bs,32);
 241         blocks[2] = bytebits_to_byte(bs+32,32);
 242         blocks[3] = bytebits_to_byte(bs+64,32);
 243         blocks[4] = bytebits_to_byte(bs+96,32);
 244
 245         PrintAndLog("Preparing to clone NEDAP to T55x7 with card number: %u", cardnumber);
 246         PrintAndLog("Blk | Data ");
 247         PrintAndLog("----+------------");
 248         for ( i = 0; i<5; ++i )
 249                 PrintAndLog(" %02d | %08" PRIx32, i, blocks[i]);
 250
 251         UsbCommand resp;
 252         UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
 253
 254         for ( i = 0; i<5; ++i ) {
 255                 c.arg[0] = blocks[i];
 256                 c.arg[1] = i;
 257                 clearCommandBuffer();
 258                 SendCommand(&c);
 259                 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
 260                         PrintAndLog("Error occurred, device did not respond during write operation.");
 261                         return -1;
 262                 }
 263         }
 264     return 0;
 265 }
 266 */
 267
 268 int CmdLFNedapSim(const char *Cmd) {
 269
 270         char cmdp = param_getchar(Cmd, 0);
 271         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_nedap_sim();
 272
 273         uint32_t cardnumber = 0, cn = 0;
 274
 275         uint8_t bs[128];
 276         size_t size = sizeof(bs);
 277         memset(bs, 0x00, size);
 278
 279         // NEDAP,  Bihase = 2, clock 64, inverted,
 280         uint8_t encoding = 2, separator = 0, clk=64, invert=1;
 281         uint16_t arg1, arg2;
 282         arg1 = clk << 8 | encoding;
 283         arg2 = invert << 8 | separator;
 284
 285         if (sscanf(Cmd, "%u", &cn ) != 2) return usage_lf_nedap_sim();
 286         cardnumber = (cn & 0x00FFFFFF);
 287
 288         if ( !GetNedapBits(cardnumber, bs)) {
 289                 PrintAndLog("Error with tag bitstream generation.");
 290                 return 1;
 291         }
 292
 293         PrintAndLog("Simulating Nedap - CardNumber: %u", cardnumber );
 294
 295         UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
 296         memcpy(c.d.asBytes, bs, size);
 297         clearCommandBuffer();
 298         SendCommand(&c);
 299         return 0;
 300 }
 301
 302
 303
 304 int CmdLFNedapChk(const char *Cmd){
 305
 306         uint8_t data[256] = { 0x30, 0x16, 0x00, 0x71, 0x40, 0x21, 0xBE};
 307         int len = 0;
 308         param_gethex_ex(Cmd, 0, data, &len);
 309
 310         len = ( len == 0 ) ? 5 : len>>1;
 311
 312         PrintAndLog("Input: [%d] %s", len, sprint_hex(data, len));
 313
 314         //uint8_t last = GetParity(data, EVEN, 62);
 315         //PrintAndLog("TEST PARITY::  %d | %d ", DemodBuffer[62], last);
 316
 317     uint8_t cl = 0x1D, ch = 0x1D, carry = 0;
 318     uint8_t al, bl, temp;
 319
 320         for (int i = 0; i < len; ++i){
 321                 al = data[i];
 322         for (int j = 8; j > 0; --j) {
 323
 324             bl = al ^ ch;
 325                         //printf("BL %02x | CH %02x \n", al, ch);
 326
 327             carry = (cl & 0x80) ? 1 : 0;
 328             cl <<= 1;
 329
 330             temp = (ch & 0x80) ? 1 : 0;
 331             ch = (ch << 1) | carry;
 332             carry = temp;
 333
 334             carry = (al & 0x80) ? 1 : 0;
 335             al <<= 1;
 336
 337             carry = (bl & 0x80) ? 1 : 0;
 338             bl <<= 1;
 339
 340             if (carry) {
 341                 cl ^= 0x21;
 342                 ch ^= 0x10;
 343             }
 344         }
 345     }
 346
 347         PrintAndLog("Nedap checksum: [ 0x21, 0xBE ] %x", ((ch << 8) | cl) );
 348         return 0;
 349 }
 350
 351
 352 static command_t CommandTable[] = {
 353     {"help",    CmdHelp,                1, "This help"},
 354         {"read",        CmdLFNedapRead, 0, "Attempt to read and extract tag data"},
 355 //      {"clone",       CmdLFNedapClone,0, "<Card Number>  clone nedap tag"},
 356         {"sim",         CmdLFNedapSim,  0, "<Card Number>  simulate nedap tag"},
 357         {"chk",         CmdLFNedapChk,  1, "Calculate Nedap Checksum <uid bytes>"},
 358     {NULL, NULL, 0, NULL}
 359 };
 360
 361 int CmdLFNedap(const char *Cmd) {
 362         clearCommandBuffer();
 363     CmdsParse(CommandTable, Cmd);
 364     return 0;
 365 }
 366
 367 int CmdHelp(const char *Cmd) {
 368     CmdsHelp(CommandTable);
 369     return 0;
 370 }