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
   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 *           aaaaaaaaiii***iiiicc----                                       iiiiiiii iiiiYYYY YYYY**** iiiiiiii iiiiiiii cccccccc
 102 *
 103 * a = fixed value BB0314FF
 104 * i = printed id, BCD-format
 105 * Y = year
 106 * c = checksum
 107 *
 108 **/
 109
 110 //see ASKDemod for what args are accepted
 111 int CmdNoralsyDemod(const char *Cmd) {
 112
 113         //ASK / Manchester
 114         DemodBufferLen = getFromGraphBuf(DemodBuffer);
 115         if (DemodBufferLen < 255) return 0;
 116         int foundclk = 0;
 117         size_t ststart = 0, stend = 0;
 118         bool st = DetectST_ext(DemodBuffer, &DemodBufferLen, &foundclk, &ststart, &stend);
 119         if (!st) return 0;
 120
 121         if (!ASKDemod_ext("32 0 0", FALSE, FALSE, 1, &st)) {
 122                 if (g_debugMode) PrintAndLog("DEBUG: Error - Noralsy: ASK/Manchester Demod failed");
 123                 return 0;
 124         }
 125         size_t size = DemodBufferLen;
 126         int ans = NoralsyDemod_AM(DemodBuffer, &size);
 127         if (ans < 0){
 128                 if (g_debugMode){
 129                         if (ans == -1)
 130                                 PrintAndLog("DEBUG: Error - Noralsy: too few bits found");
 131                         else if (ans == -2)
 132                                 PrintAndLog("DEBUG: Error - Noralsy: preamble not found");
 133                         else if (ans == -3)
 134                                 PrintAndLog("DEBUG: Error - Noralsy: Size not correct: %d", size);
 135                         else
 136                                 PrintAndLog("DEBUG: Error - Noralsy: ans: %d", ans);
 137                 }
 138                 return 0;
 139         }
 140         setDemodBuf(DemodBuffer, 96, ans);
 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         CmdLFRead("s");
 179         getSamples("8000",TRUE);
 180         return CmdNoralsyDemod(Cmd);
 181 }
 182
 183 int CmdNoralsyClone(const char *Cmd) {
 184
 185         uint16_t year = 0;
 186         uint32_t id = 0;
 187         uint32_t blocks[4] = {T55x7_MODULATION_MANCHESTER | T55x7_BITRATE_RF_32 | T55x7_ST_TERMINATOR | 3 << T55x7_MAXBLOCK_SHIFT, 0, 0};
 188         uint8_t bits[96];
 189         uint8_t *bs = bits;
 190         memset(bs, 0, sizeof(bits));
 191
 192         char cmdp = param_getchar(Cmd, 0);
 193         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_noralsy_clone();
 194
 195         id = param_get32ex(Cmd, 0, 0, 16);
 196         year = param_get32ex(Cmd, 1, 2000, 16);
 197
 198         //Q5
 199         if (param_getchar(Cmd, 2) == 'Q' || param_getchar(Cmd, 2) == 'q') {
 200                 //t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
 201                 blocks[0] = T5555_MODULATION_MANCHESTER | ((32-2)>>1) << T5555_BITRATE_SHIFT | T5555_ST_TERMINATOR | 3 << T5555_MAXBLOCK_SHIFT;
 202         }
 203
 204          if ( !getnoralsyBits(id, year, bs)) {
 205                 PrintAndLog("Error with tag bitstream generation.");
 206                 return 1;
 207         }
 208
 209         //
 210         blocks[1] = bytebits_to_byte(bs,32);
 211         blocks[2] = bytebits_to_byte(bs+32,32);
 212         blocks[3] = bytebits_to_byte(bs+64,32);
 213
 214         PrintAndLog("Preparing to clone Noralsy to T55x7 with CardId: %x", id);
 215         PrintAndLog("Blk | Data ");
 216         PrintAndLog("----+------------");
 217         PrintAndLog(" 00 | 0x%08x", blocks[0]);
 218         PrintAndLog(" 01 | 0x%08x", blocks[1]);
 219         PrintAndLog(" 02 | 0x%08x", blocks[2]);
 220         PrintAndLog(" 03 | 0x%08x", blocks[3]);
 221
 222         UsbCommand resp;
 223         UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
 224
 225         for (int i = 3; i >= 0; --i) {
 226                 c.arg[0] = blocks[i];
 227                 c.arg[1] = i;
 228                 clearCommandBuffer();
 229                 SendCommand(&c);
 230                 if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)){
 231                         PrintAndLog("Error occurred, device did not respond during write operation.");
 232                         return -1;
 233                 }
 234         }
 235         return 0;
 236 }
 237
 238 int CmdNoralsySim(const char *Cmd) {
 239
 240         uint8_t bits[96];
 241         uint8_t *bs = bits;
 242         memset(bs, 0, sizeof(bits));
 243
 244         uint16_t year = 0;
 245         uint32_t id = 0;
 246
 247         char cmdp = param_getchar(Cmd, 0);
 248         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_noralsy_sim();
 249
 250         id = param_get32ex(Cmd, 0, 0, 16);
 251         year = param_get32ex(Cmd, 1, 2000, 16);
 252
 253         uint8_t clk = 32, encoding = 1, separator = 1, invert = 0;
 254         uint16_t arg1, arg2;
 255         size_t size = 96;
 256         arg1 = clk << 8 | encoding;
 257         arg2 = invert << 8 | separator;
 258
 259         if ( !getnoralsyBits(id, year, bs)) {
 260                 PrintAndLog("Error with tag bitstream generation.");
 261                 return 1;
 262         }
 263
 264         PrintAndLog("Simulating Noralsy - CardId: %x", id);
 265
 266         UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
 267         memcpy(c.d.asBytes, bs, size);
 268         clearCommandBuffer();
 269         SendCommand(&c);
 270         return 0;
 271 }
 272
 273 static command_t CommandTable[] = {
 274         {"help",  CmdHelp,        1, "This help"},
 275         {"demod", CmdNoralsyDemod,1, "Attempt to read and extract tag data from the GraphBuffer"},
 276         {"read",  CmdNoralsyRead, 0, "Attempt to read and extract tag data from the antenna"},
 277         {"clone", CmdNoralsyClone,0, "clone Noralsy tag"},
 278         {"sim",   CmdNoralsySim,  0, "simulate Noralsy tag"},
 279     {NULL, NULL, 0, NULL}
 280 };
 281
 282 int CmdLFNoralsy(const char *Cmd) {
 283         clearCommandBuffer();
 284         CmdsParse(CommandTable, Cmd);
 285         return 0;
 286 }
 287
 288 int CmdHelp(const char *Cmd) {
 289         CmdsHelp(CommandTable);
 290         return 0;
 291 }