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