git.zerfleddert.de Git - proxmark3-svn/blob - client/cmdlfnoralsy.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 Noralsy tag commands
   8 // ASK/Manchester, STT, RF/32, 96 bits long (some bits unknown)
   9 //-----------------------------------------------------------------------------
  10
  11 #include "cmdlfnoralsy.h"
  12
  13 #include <string.h>
  14 #include <inttypes.h>
  15 #include <math.h>
  16 #include "comms.h"
  17 #include "ui.h"
  18 #include "util.h"
  19 #include "graph.h"
  20 #include "cmdparser.h"
  21 #include "cmddata.h"
  22 #include "cmdmain.h"
  23 #include "cmdlf.h"
  24 #include "protocols.h"  // for T55xx config register definitions
  25 #include "lfdemod.h"    // parityTest
  26
  27 static int CmdHelp(const char *Cmd);
  28
  29 int usage_lf_noralsy_clone(void){
  30         PrintAndLog("clone a Noralsy tag to a T55x7 tag.");
  31         PrintAndLog("Usage: lf noralsy clone [h] <card id> <year> <Q5>");
  32         PrintAndLog("Options:");
  33         PrintAndLog("      h          : This help");
  34         PrintAndLog("      <card id>  : Noralsy card ID");
  35         PrintAndLog("      <year>     : Tag allocation year");
  36         PrintAndLog("      <Q5>       : specify write to Q5 (t5555 instead of t55x7)");
  37         PrintAndLog("");
  38         PrintAndLog("Sample: lf noralsy clone 112233");
  39         return 0;
  40 }
  41
  42 int usage_lf_noralsy_sim(void) {
  43         PrintAndLog("Enables simulation of Noralsy card with specified card number.");
  44         PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
  45         PrintAndLog("");
  46         PrintAndLog("Usage:  lf noralsy sim [h] <card id> <year>");
  47         PrintAndLog("Options:");
  48         PrintAndLog("      h          : This help");
  49         PrintAndLog("      <card id>  : Noralsy card ID");
  50         PrintAndLog("      <year>     : Tag allocation year");
  51         PrintAndLog("");
  52         PrintAndLog("Sample: lf noralsy sim 112233");
  53         return 0;
  54 }
  55
  56 static uint8_t noralsy_chksum( uint8_t* bits, uint8_t len) {
  57         uint8_t sum = 0;
  58         for (uint8_t i = 0; i < len; i += 4)
  59                 sum ^= bytebits_to_byte(bits+i, 4);
  60         return sum & 0x0F ;
  61 }
  62 int getnoralsyBits(uint32_t id, uint16_t year, uint8_t *bits) {
  63         //preamp
  64         num_to_bytebits(0xBB0214FF, 32, bits);  // --> Have seen 0xBB0214FF / 0xBB0314FF  UNKNOWN
  65
  66         year &= 0xFF;
  67
  68         uint16_t sub1 = (id & 0xFFF0000) >> 16;
  69         uint8_t sub2 = (id & 0x000FF00) >> 8;
  70         uint8_t sub3 = (id & 0x00000FF);
  71
  72         num_to_bytebits(sub1, 12, bits+32);
  73         num_to_bytebits(year, 8, bits+44);
  74         num_to_bytebits(0, 4, bits+52);   // --> UNKNOWN. Flag?
  75
  76         num_to_bytebits(sub2, 8, bits+56);
  77         num_to_bytebits(sub3, 8, bits+64);
  78
  79         //chksum byte
  80         uint8_t chksum = noralsy_chksum(bits+32, 40);
  81         num_to_bytebits(chksum, 4, bits+72);
  82         chksum = noralsy_chksum(bits, 76);
  83         num_to_bytebits(chksum, 4, bits+76);
  84         return 1;
  85 }
  86
  87 // by iceman
  88 // find Noralsy preamble in already demoded data
  89 int NoralsyDemod_AM(uint8_t *dest, size_t *size) {
  90         if (*size < 96) return -1; //make sure buffer has data
  91         size_t startIdx = 0;
  92         uint8_t preamble[] = {1,0,1,1,1,0,1,1,0,0,0,0};
  93         if (!preambleSearch(dest, preamble, sizeof(preamble), size, &startIdx))
  94                 return -2; //preamble not found
  95         if (*size != 96) return -3; //wrong demoded size
  96         //return start position
  97         return (int)startIdx;
  98 }
  99
 100 /*
 101 *
 102 * 2520116 | BB0214FF2529900116360000 | 10111011 00000011 00010100 11111111 00100101 00101001 10010000 00000001 00010110 00110110 00000000 00000000
 103 *           aaa*aaaaiiiYY*iiiicc----                ****                   iiiiiiii iiiiYYYY YYYY**** iiiiiiii iiiiiiii cccccccc
 104 *
 105 * a = fixed value BB0*14FF
 106 * i = printed id, BCD-format
 107 * Y = year
 108 * c = checksum
 109 * * = unknown
 110 *
 111 **/
 112
 113 //see ASKDemod for what args are accepted
 114 int CmdNoralsyDemod(const char *Cmd) {
 115
 116         //ASK / Manchester
 117         bool st = true;
 118         if (!ASKDemod_ext("32 0 0", false, false, 1, &st)) {
 119                 if (g_debugMode) PrintAndLog("DEBUG: Error - Noralsy: ASK/Manchester Demod failed");
 120                 return 0;
 121         }
 122         if (!st) return 0;
 123
 124         size_t size = DemodBufferLen;
 125         int ans = NoralsyDemod_AM(DemodBuffer, &size);
 126         if (ans < 0){
 127                 if (g_debugMode){
 128                         if (ans == -1)
 129                                 PrintAndLog("DEBUG: Error - Noralsy: too few bits found");
 130                         else if (ans == -2)
 131                                 PrintAndLog("DEBUG: Error - Noralsy: preamble not found");
 132                         else if (ans == -3)
 133                                 PrintAndLog("DEBUG: Error - Noralsy: Size not correct: %d", size);
 134                         else
 135                                 PrintAndLog("DEBUG: Error - Noralsy: ans: %d", ans);
 136                 }
 137                 return 0;
 138         }
 139         setDemodBuf(DemodBuffer, 96, ans);
 140         setClockGrid(g_DemodClock, g_DemodStartIdx + (ans*g_DemodClock));
 141         //setGrid_Clock(32);
 142
 143         //got a good demod
 144         uint32_t raw1 = bytebits_to_byte(DemodBuffer, 32);
 145         uint32_t raw2 = bytebits_to_byte(DemodBuffer+32, 32);
 146         uint32_t raw3 = bytebits_to_byte(DemodBuffer+64, 32);
 147
 148         uint32_t cardid = (bytebits_to_byte(DemodBuffer+32, 12)<<16) | bytebits_to_byte(DemodBuffer+32+24, 16);
 149
 150         uint16_t year = (raw2 & 0x000ff000) >> 12;
 151         year += ( year > 0x60 ) ? 0x1900: 0x2000;
 152
 153         // calc checksums
 154         uint8_t calc1 = noralsy_chksum(DemodBuffer+32, 40);
 155         uint8_t calc2 = noralsy_chksum(DemodBuffer, 76);
 156         uint8_t chk1 = 0, chk2 = 0;
 157         chk1 = bytebits_to_byte(DemodBuffer+72, 4);
 158         chk2 = bytebits_to_byte(DemodBuffer+76, 4);
 159         // test checksums
 160         if ( chk1 != calc1 ) {
 161                 if (g_debugMode) PrintAndLog("DEBUG: Error - Noralsy: checksum 1 failed %x - %x\n", chk1, calc1);
 162                 return 0;
 163         }
 164         if ( chk2 != calc2 ) {
 165                 if (g_debugMode) PrintAndLog("DEBUG: Error - Noralsy: checksum 2 failed %x - %x\n", chk2, calc2);
 166                 return 0;
 167         }
 168
 169         PrintAndLog("Noralsy Tag Found: Card ID %X, Year: %X Raw: %08X%08X%08X", cardid, year, raw1 ,raw2, raw3);
 170         if (raw1 != 0xBB0214FF) {
 171                 PrintAndLog("Unknown bits set in first block! Expected 0xBB0214FF, Found: 0x%08X", raw1);
 172                 PrintAndLog("Please post this output in forum to further research on this format");
 173         }
 174         return 1;
 175 }
 176
 177 int CmdNoralsyRead(const char *Cmd) {
 178         lf_read(true, 8000);
 179         return CmdNoralsyDemod(Cmd);
 180 }
 181
 182 int CmdNoralsyClone(const char *Cmd) {
 183
 184         uint16_t year = 0;
 185         uint32_t id = 0;
 186         uint32_t blocks[4] = {T55x7_MODULATION_MANCHESTER | T55x7_BITRATE_RF_32 | T55x7_ST_TERMINATOR | 3 << T55x7_MAXBLOCK_SHIFT, 0, 0};
 187         uint8_t bits[96];
 188         uint8_t *bs = bits;
 189         memset(bs, 0, sizeof(bits));
 190
 191         char cmdp = param_getchar(Cmd, 0);
 192         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_noralsy_clone();
 193
 194         id = param_get32ex(Cmd, 0, 0, 16);
 195         year = param_get32ex(Cmd, 1, 2000, 16);
 196
 197         //Q5
 198         if (param_getchar(Cmd, 2) == 'Q' || param_getchar(Cmd, 2) == 'q') {
 199                 //t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
 200                 blocks[0] = T5555_MODULATION_MANCHESTER | ((32-2)>>1) << T5555_BITRATE_SHIFT | T5555_ST_TERMINATOR | 3 << T5555_MAXBLOCK_SHIFT;
 201         }
 202
 203          if ( !getnoralsyBits(id, year, bs)) {
 204                 PrintAndLog("Error with tag bitstream generation.");
 205                 return 1;
 206         }
 207
 208         //
 209         blocks[1] = bytebits_to_byte(bs,32);
 210         blocks[2] = bytebits_to_byte(bs+32,32);
 211         blocks[3] = bytebits_to_byte(bs+64,32);
 212
 213         PrintAndLog("Preparing to clone Noralsy to T55x7 with CardId: %x", id);
 214         PrintAndLog("Blk | Data ");
 215         PrintAndLog("----+------------");
 216         PrintAndLog(" 00 | 0x%08x", blocks[0]);
 217         PrintAndLog(" 01 | 0x%08x", blocks[1]);
 218         PrintAndLog(" 02 | 0x%08x", blocks[2]);
 219         PrintAndLog(" 03 | 0x%08x", blocks[3]);
 220
 221         UsbCommand resp;
 222         UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
 223
 224         for (int i = 3; i >= 0; --i) {
 225                 c.arg[0] = blocks[i];
 226                 c.arg[1] = i;
 227                 clearCommandBuffer();
 228                 SendCommand(&c);
 229                 if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)){
 230                         PrintAndLog("Error occurred, device did not respond during write operation.");
 231                         return -1;
 232                 }
 233         }
 234         return 0;
 235 }
 236
 237 int CmdNoralsySim(const char *Cmd) {
 238
 239         uint8_t bits[96];
 240         uint8_t *bs = bits;
 241         memset(bs, 0, sizeof(bits));
 242
 243         uint16_t year = 0;
 244         uint32_t id = 0;
 245
 246         char cmdp = param_getchar(Cmd, 0);
 247         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_noralsy_sim();
 248
 249         id = param_get32ex(Cmd, 0, 0, 16);
 250         year = param_get32ex(Cmd, 1, 2000, 16);
 251
 252         uint8_t clk = 32, encoding = 1, separator = 1, invert = 0;
 253         uint16_t arg1, arg2;
 254         size_t size = 96;
 255         arg1 = clk << 8 | encoding;
 256         arg2 = invert << 8 | separator;
 257
 258         if ( !getnoralsyBits(id, year, bs)) {
 259                 PrintAndLog("Error with tag bitstream generation.");
 260                 return 1;
 261         }
 262
 263         PrintAndLog("Simulating Noralsy - CardId: %x", id);
 264
 265         UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
 266         memcpy(c.d.asBytes, bs, size);
 267         clearCommandBuffer();
 268         SendCommand(&c);
 269         return 0;
 270 }
 271
 272 static command_t CommandTable[] = {
 273         {"help",  CmdHelp,        1, "This help"},
 274         {"demod", CmdNoralsyDemod,1, "Attempt to read and extract tag data from the GraphBuffer"},
 275         {"read",  CmdNoralsyRead, 0, "Attempt to read and extract tag data from the antenna"},
 276         {"clone", CmdNoralsyClone,0, "clone Noralsy tag"},
 277         {"sim",   CmdNoralsySim,  0, "simulate Noralsy tag"},
 278     {NULL, NULL, 0, NULL}
 279 };
 280
 281 int CmdLFNoralsy(const char *Cmd) {
 282         clearCommandBuffer();
 283         CmdsParse(CommandTable, Cmd);
 284         return 0;
 285 }
 286
 287 int CmdHelp(const char *Cmd) {
 288         CmdsHelp(CommandTable);
 289         return 0;
 290 }