git.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         if (!ASKbiphaseDemod("0 64 0 0", FALSE)) {
  86                 if (g_debugMode) PrintAndLog("Error NEDAP: ASKbiphaseDemod failed");
  87                 return 0;
  88         }
  89         size_t size = DemodBufferLen;
  90         int idx = NedapDemod(DemodBuffer, &size);
  91         if (idx < 0){
  92                 if (g_debugMode){
  93                         // if (idx == -5)
  94                                 // PrintAndLog("DEBUG: Error - not enough samples");
  95                         // else if (idx == -1)
  96                                 // PrintAndLog("DEBUG: Error - only noise found");
  97                         // else if (idx == -2)
  98                                 // PrintAndLog("DEBUG: Error - problem during ASK/Biphase demod");
  99                         if (idx == -3)
 100                                 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
 101                         else if (idx == -4)
 102                                 PrintAndLog("DEBUG: Error - NEDAP preamble not found");
 103                         else
 104                                 PrintAndLog("DEBUG: Error - idx: %d",idx);
 105                 }
 106                 return 0;
 107         }
 108
 109 /* Index map                                                      E                                                                              E
 110  preamble    enc tag type         encrypted uid                   P d    33    d    90    d    04    d    71    d    40    d    45    d    E7    P
 111  1111111110 00101101000001011010001100100100001011010100110101100 1 0 00110011 0 10010000 0 00000100 0 01110001 0 01000000 0 01000101 0 11100111 1
 112                                                                          uid2       uid1       uid0         I          I          R           R
 113  1111111110 00101101000001011010001100100100001011010100110101100 1
 114
 115  0 00110011
 116  0 10010000
 117  0 00000100
 118  0 01110001
 119  0 01000000
 120  0 01000101
 121  0 11100111
 122  1
 123
 124          Tag ID is 049033
 125          I = Identical on all tags
 126          R = Random ?
 127          UID2, UID1, UID0 == card number
 128
 129 */
 130         //get raw ID before removing parities
 131         uint32_t raw[4] = {0,0,0,0};
 132         raw[0] = bytebits_to_byte(DemodBuffer+idx+96,32);
 133         raw[1] = bytebits_to_byte(DemodBuffer+idx+64,32);
 134         raw[2] = bytebits_to_byte(DemodBuffer+idx+32,32);
 135         raw[3] = bytebits_to_byte(DemodBuffer+idx,32);
 136         setDemodBuf(DemodBuffer,128,idx);
 137
 138         uint8_t firstParity = GetParity( DemodBuffer, EVEN, 63);
 139         if ( firstParity != DemodBuffer[63]  ) {
 140                 PrintAndLog("1st 64bit parity check failed:  %d|%d ", DemodBuffer[63], firstParity);
 141                 return 0;
 142         }
 143
 144         uint8_t secondParity = GetParity( DemodBuffer+64, EVEN, 63);
 145         if ( secondParity != DemodBuffer[127]  ) {
 146                 PrintAndLog("2st 64bit parity check failed:  %d|%d ", DemodBuffer[127], secondParity);
 147                 return 0;
 148         }
 149
 150         // ok valid card found!
 151         uint32_t uid = 0;
 152         uid =  bytebits_to_byte(DemodBuffer+65, 8);
 153         uid |= bytebits_to_byte(DemodBuffer+74, 8) << 8;
 154         uid |= bytebits_to_byte(DemodBuffer+83, 8) << 16;
 155
 156         uint16_t two = 0;
 157         two =  bytebits_to_byte(DemodBuffer+92, 8);
 158         two |= bytebits_to_byte(DemodBuffer+101, 8) << 8;
 159
 160         uint16_t chksum2 = 0;
 161         chksum2 =  bytebits_to_byte(DemodBuffer+110, 8);
 162         chksum2 |= bytebits_to_byte(DemodBuffer+119, 8) << 8;
 163
 164         PrintAndLog("NEDAP ID Found - Raw: %08x%08x%08x%08x", raw[3], raw[2], raw[1], raw[0]);
 165         PrintAndLog(" - UID: %06X", uid);
 166         PrintAndLog(" - i: %04X", two);
 167         PrintAndLog(" - Checksum2 %04X", chksum2);
 168
 169         if (g_debugMode){
 170                 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128);
 171                 printDemodBuff();
 172                 PrintAndLog("BIN:\n%s", sprint_bin_break( DemodBuffer, 128, 64) );
 173         }
 174
 175         return 1;
 176 }
 177 /*
 178 configuration
 179 lf t55xx wr b 0 d 00170082
 180
 181 1) uid 049033
 182 lf t55 wr b 1 d FF8B4168
 183 lf t55 wr b 2 d C90B5359
 184 lf t55 wr b 3 d 19A40087
 185 lf t55 wr b 4 d 120115CF
 186
 187 2) uid 001630
 188 lf t55 wr b 1 d FF8B6B20
 189 lf t55 wr b 2 d F19B84A3
 190 lf t55 wr b 3 d 18058007
 191 lf t55 wr b 4 d 1200857C
 192
 193 3) uid 39feff
 194 lf t55xx wr b 1 d ffbfa73e
 195 lf t55xx wr b 2 d 4c0003ff
 196 lf t55xx wr b 3 d ffbfa73e
 197 lf t55xx wr b 4 d 4c0003ff
 198
 199 */
 200
 201 int CmdLFNedapRead(const char *Cmd) {
 202         CmdLFRead("s");
 203         getSamples("30000",false);
 204         return CmdLFNedapDemod("");
 205 }
 206 /*
 207 int CmdLFNedapClone(const char *Cmd) {
 208
 209         char cmdp = param_getchar(Cmd, 0);
 210         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_nedap_clone();
 211
 212         uint32_t cardnumber=0, cn = 0;
 213         uint32_t blocks[5];
 214         uint8_t i;
 215         uint8_t bs[128];
 216         memset(bs, 0x00, sizeof(bs));
 217
 218         if (sscanf(Cmd, "%u", &cn ) != 1) return usage_lf_nedap_clone();
 219
 220         cardnumber = (cn & 0x00FFFFFF);
 221
 222         if ( !GetNedapBits(cardnumber, bs)) {
 223                 PrintAndLog("Error with tag bitstream generation.");
 224                 return 1;
 225         }
 226
 227         ((ASK/biphase   data rawdemod ab 0 64 1 0
 228         //NEDAP - compat mode, ASK/Biphase, data rate 64, 4 data blocks
 229         blocks[0] = T55x7_MODULATION_BIPHASE | T55x7_BITRATE_RF_64 | 4<<T55x7_MAXBLOCK_SHIFT;
 230
 231         if (param_getchar(Cmd, 3) == 'Q' || param_getchar(Cmd, 3) == 'q')
 232                 //t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
 233                 blocks[0] = T5555_MODULATION_BIPHASE | T5555_INVERT_OUTPUT | 64<<T5555_BITRATE_SHIFT | 4<<T5555_MAXBLOCK_SHIFT;
 234
 235         blocks[1] = bytebits_to_byte(bs,32);
 236         blocks[2] = bytebits_to_byte(bs+32,32);
 237         blocks[3] = bytebits_to_byte(bs+64,32);
 238         blocks[4] = bytebits_to_byte(bs+96,32);
 239
 240         PrintAndLog("Preparing to clone NEDAP to T55x7 with card number: %u", cardnumber);
 241         PrintAndLog("Blk | Data ");
 242         PrintAndLog("----+------------");
 243         for ( i = 0; i<5; ++i )
 244                 PrintAndLog(" %02d | %08" PRIx32, i, blocks[i]);
 245
 246         UsbCommand resp;
 247         UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
 248
 249         for ( i = 0; i<5; ++i ) {
 250                 c.arg[0] = blocks[i];
 251                 c.arg[1] = i;
 252                 clearCommandBuffer();
 253                 SendCommand(&c);
 254                 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
 255                         PrintAndLog("Error occurred, device did not respond during write operation.");
 256                         return -1;
 257                 }
 258         }
 259     return 0;
 260 }
 261 */
 262
 263 int CmdLFNedapSim(const char *Cmd) {
 264
 265         char cmdp = param_getchar(Cmd, 0);
 266         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_nedap_sim();
 267
 268         uint32_t cardnumber = 0, cn = 0;
 269
 270         uint8_t bs[128];
 271         size_t size = sizeof(bs);
 272         memset(bs, 0x00, size);
 273
 274         // NEDAP,  Bihase = 2, clock 64, inverted,
 275         uint8_t encoding = 2, separator = 0, clk=64, invert=1;
 276         uint16_t arg1, arg2;
 277         arg1 = clk << 8 | encoding;
 278         arg2 = invert << 8 | separator;
 279
 280         if (sscanf(Cmd, "%u", &cn ) != 2) return usage_lf_nedap_sim();
 281         cardnumber = (cn & 0x00FFFFFF);
 282
 283         if ( !GetNedapBits(cardnumber, bs)) {
 284                 PrintAndLog("Error with tag bitstream generation.");
 285                 return 1;
 286         }
 287
 288         PrintAndLog("Simulating Nedap - CardNumber: %u", cardnumber );
 289
 290         UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
 291         memcpy(c.d.asBytes, bs, size);
 292         clearCommandBuffer();
 293         SendCommand(&c);
 294         return 0;
 295 }
 296
 297
 298
 299 int CmdLFNedapChk(const char *Cmd){
 300
 301         uint8_t data[256] = { 0x30, 0x16, 0x00, 0x71, 0x40, 0x21, 0xBE};
 302         int len = 0;
 303         param_gethex_ex(Cmd, 0, data, &len);
 304
 305         len = ( len == 0 ) ? 5 : len>>1;
 306
 307         PrintAndLog("Input: [%d] %s", len, sprint_hex(data, len));
 308
 309         //uint8_t last = GetParity(data, EVEN, 62);
 310         //PrintAndLog("TEST PARITY::  %d | %d ", DemodBuffer[62], last);
 311
 312     uint8_t cl = 0x1D, ch = 0x1D, carry = 0;
 313     uint8_t al, bl, temp;
 314
 315         for (int i = 0; i < len; ++i){
 316                 al = data[i];
 317         for (int j = 8; j > 0; --j) {
 318
 319             bl = al ^ ch;
 320                         //printf("BL %02x | CH %02x \n", al, ch);
 321
 322             carry = (cl & 0x80) ? 1 : 0;
 323             cl <<= 1;
 324
 325             temp = (ch & 0x80) ? 1 : 0;
 326             ch = (ch << 1) | carry;
 327             carry = temp;
 328
 329             carry = (al & 0x80) ? 1 : 0;
 330             al <<= 1;
 331
 332             carry = (bl & 0x80) ? 1 : 0;
 333             bl <<= 1;
 334
 335             if (carry) {
 336                 cl ^= 0x21;
 337                 ch ^= 0x10;
 338             }
 339         }
 340     }
 341
 342         PrintAndLog("Nedap checksum: [ 0x21, 0xBE ] %x", ((ch << 8) | cl) );
 343         return 0;
 344 }
 345
 346
 347 static command_t CommandTable[] = {
 348     {"help",    CmdHelp,                1, "This help"},
 349         {"read",        CmdLFNedapRead, 0, "Attempt to read and extract tag data"},
 350 //      {"clone",       CmdLFNedapClone,0, "<Card Number>  clone nedap tag"},
 351         {"sim",         CmdLFNedapSim,  0, "<Card Number>  simulate nedap tag"},
 352         {"chk",         CmdLFNedapChk,  1, "Calculate Nedap Checksum <uid bytes>"},
 353     {NULL, NULL, 0, NULL}
 354 };
 355
 356 int CmdLFNedap(const char *Cmd) {
 357         clearCommandBuffer();
 358     CmdsParse(CommandTable, Cmd);
 359     return 0;
 360 }
 361
 362 int CmdHelp(const char *Cmd) {
 363     CmdsHelp(CommandTable);
 364     return 0;
 365 }