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 Presco tag commands
   8 //-----------------------------------------------------------------------------
   9
  10 #include "cmdlfnoralsy.h"
  11
  12 static int CmdHelp(const char *Cmd);
  13
  14 int usage_lf_noralsy_clone(void){
  15         PrintAndLog("clone a Noralsy tag to a T55x7 tag.");
  16         PrintAndLog("Usage: lf noralsy clone [h] <card ID> <Q5>");
  17         PrintAndLog("Options:");
  18         PrintAndLog("      h          : This help");
  19         PrintAndLog("      <card ID>  : Noralsy card ID");
  20         PrintAndLog("      <Q5>       : specify write to Q5 (t5555 instead of t55x7)");
  21         PrintAndLog("");
  22         PrintAndLog("Sample: lf noralsy clone 112233");
  23         return 0;
  24 }
  25
  26 int usage_lf_noralsy_sim(void) {
  27         PrintAndLog("Enables simulation of Noralsy 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 noralsy sim [h] <card ID>");
  31         PrintAndLog("Options:");
  32         PrintAndLog("      h          : This help");
  33         PrintAndLog("      <card ID>  : Noralsy card ID");
  34         PrintAndLog("");
  35         PrintAndLog("Sample: lf noralsy sim 112233");
  36         return 0;
  37 }
  38
  39 static uint8_t noralsy_chksum( uint8_t* bits, uint8_t len) {
  40     uint8_t sum = 0;
  41     for (uint8_t i = 0; i < len; i += 4)
  42         sum ^= bytebits_to_byte(bits+i, 4);
  43     return sum & 0x0F ;
  44 }
  45 int getnoralsyBits(uint32_t id, uint8_t *bits) {
  46         //preamp
  47         num_to_bytebits(0xBB0214FF, 32, bits);  // --> Have seen 0xBB0214FF / 0xBB0314FF  UNKNOWN
  48
  49         //convert ID into BCD-format
  50         id = DEC2BCD(id);
  51
  52         uint16_t sub1 = (id & 0xFFF0000) >> 16;
  53         uint8_t sub2 = (id & 0x000FF00) >> 8;
  54         uint8_t sub3 = (id & 0x00000FF);
  55
  56         num_to_bytebits(sub1, 12, bits+32);
  57         num_to_bytebits(0x980, 12, bits+44);   // --> UNKNOWN part
  58         num_to_bytebits(sub2, 8, bits+56);
  59         num_to_bytebits(sub3, 8, bits+64);
  60
  61         //chksum byte
  62         uint8_t chksum = noralsy_chksum(bits+32, 40);
  63         num_to_bytebits(chksum, 4, bits+72);
  64         chksum = noralsy_chksum(bits, 76);
  65         num_to_bytebits(chksum, 4, bits+76);
  66         return 1;
  67 }
  68
  69 //see ASKDemod for what args are accepted
  70 int CmdNoralsyDemod(const char *Cmd) {
  71
  72         //ASK / Manchester
  73         bool st = true;
  74         if (!ASKDemod_ext("32 0 0", FALSE, FALSE, 1, &st)) {
  75                 if (g_debugMode) PrintAndLog("DEBUG: Error - Noralsy: ASK/Manchester Demod failed");
  76                 return 0;
  77         }
  78         size_t size = DemodBufferLen;
  79         int ans = NoralsyDemod_AM(DemodBuffer, &size);
  80         if (ans < 0){
  81                 if (g_debugMode){
  82                         if (ans == -1)
  83                                 PrintAndLog("DEBUG: Error - Noralsy: too few bits found");
  84                         else if (ans == -2)
  85                                 PrintAndLog("DEBUG: Error - Noralsy: preamble not found");
  86                         else if (ans == -3)
  87                                 PrintAndLog("DEBUG: Error - Noralsy: Size not correct: %d", size);
  88                         else
  89                                 PrintAndLog("DEBUG: Error - Noralsy: ans: %d", ans);
  90                 }
  91                 return 0;
  92         }
  93         setDemodBuf(DemodBuffer, 96, ans);
  94
  95         //got a good demod
  96         uint32_t raw1 = bytebits_to_byte(DemodBuffer, 32);
  97         uint32_t raw2 = bytebits_to_byte(DemodBuffer+32, 32);
  98         uint32_t raw3 = bytebits_to_byte(DemodBuffer+64, 32);
  99
 100         uint32_t cardid = ((raw2 & 0xFFF00000) >> 20) << 16;
 101         cardid |= (raw2 & 0xFF) << 8;
 102         cardid |= ((raw3 & 0xFF000000) >> 24);
 103         cardid = BCD2DEC(cardid);
 104
 105         // calc checksums
 106         uint8_t calc1 = noralsy_chksum(DemodBuffer+32, 40);
 107         uint8_t calc2 = noralsy_chksum(DemodBuffer, 76);
 108         uint8_t chk1 = 0, chk2 = 0;
 109         chk1 = bytebits_to_byte(DemodBuffer+72, 4);
 110         chk2 = bytebits_to_byte(DemodBuffer+76, 4);
 111         // test checksums
 112         if ( chk1 != calc1 ) {
 113                 printf("checksum 1 failed %x - %x\n", chk1, calc1);
 114                 return 0;
 115         }
 116         if ( chk2 != calc2 ) {
 117                 printf("checksum 2 failed %x - %x\n", chk2, calc2);
 118                 return 0;
 119         }
 120
 121         PrintAndLog("Noralsy Tag Found: Card ID %u,  Raw: %08X%08X%08X", cardid,  raw1 ,raw2, raw3);
 122         return 1;
 123 }
 124
 125 int CmdNoralsyRead(const char *Cmd) {
 126         CmdLFRead("s");
 127         getSamples("20000",TRUE);
 128         return CmdNoralsyDemod(Cmd);
 129 }
 130
 131 int CmdNoralsyClone(const char *Cmd) {
 132
 133         uint32_t id = 0;
 134         uint32_t blocks[4] = {T55x7_MODULATION_MANCHESTER | T55x7_BITRATE_RF_32 | T55x7_ST_TERMINATOR |3<<T55x7_MAXBLOCK_SHIFT, 0, 0};
 135
 136         uint8_t bits[96];
 137         uint8_t *bs = bits;
 138         memset(bs, 0, sizeof(bits));
 139
 140         char cmdp = param_getchar(Cmd, 0);
 141         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_noralsy_clone();
 142
 143         id = param_get32ex(Cmd, 0, 0, 10);
 144
 145         //Q5
 146         if (param_getchar(Cmd, 1) == 'Q' || param_getchar(Cmd, 1) == 'q') {
 147                 //t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
 148                 blocks[0] = T5555_MODULATION_MANCHESTER | 32<<T5555_BITRATE_SHIFT | T5555_ST_TERMINATOR | 3<<T5555_MAXBLOCK_SHIFT;
 149         }
 150
 151          if ( !getnoralsyBits(id, bs)) {
 152                 PrintAndLog("Error with tag bitstream generation.");
 153                 return 1;
 154         }
 155
 156         //
 157         blocks[1] = bytebits_to_byte(bs,32);
 158         blocks[2] = bytebits_to_byte(bs+32,32);
 159         blocks[3] = bytebits_to_byte(bs+64,32);
 160
 161         PrintAndLog("Preparing to clone Noralsy to T55x7 with CardId: %u", id);
 162         PrintAndLog("Blk | Data ");
 163         PrintAndLog("----+------------");
 164         PrintAndLog(" 00 | 0x%08x", blocks[0]);
 165         PrintAndLog(" 01 | 0x%08x", blocks[1]);
 166         PrintAndLog(" 02 | 0x%08x", blocks[2]);
 167         PrintAndLog(" 03 | 0x%08x", blocks[3]);
 168
 169         UsbCommand resp;
 170         UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
 171
 172         for (int i = 3; i >= 0; --i) {
 173                 c.arg[0] = blocks[i];
 174                 c.arg[1] = i;
 175                 clearCommandBuffer();
 176                 SendCommand(&c);
 177                 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
 178                         PrintAndLog("Error occurred, device did not respond during write operation.");
 179                         return -1;
 180                 }
 181         }
 182     return 0;
 183 }
 184
 185 int CmdNoralsySim(const char *Cmd) {
 186
 187         uint8_t bits[96];
 188         uint8_t *bs = bits;
 189         memset(bs, 0, sizeof(bits));
 190
 191         uint32_t id = 0;
 192         char cmdp = param_getchar(Cmd, 0);
 193         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_noralsy_sim();
 194
 195         id = param_get32ex(Cmd, 0, 0, 10);
 196
 197         uint8_t clk = 32, encoding = 1, separator = 1, invert = 0;
 198         uint16_t arg1, arg2;
 199         size_t size = 96;
 200         arg1 = clk << 8 | encoding;
 201         arg2 = invert << 8 | separator;
 202
 203          if ( !getnoralsyBits(id, bs)) {
 204                 PrintAndLog("Error with tag bitstream generation.");
 205                 return 1;
 206         }
 207
 208         PrintAndLog("Simulating Noralsy - CardId: %u", id);
 209
 210         UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
 211         memcpy(c.d.asBytes, bs, size);
 212         clearCommandBuffer();
 213         SendCommand(&c);
 214         return 0;
 215 }
 216
 217 static command_t CommandTable[] = {
 218     {"help",    CmdHelp,                1, "This help"},
 219         {"read",        CmdNoralsyRead, 0, "Attempt to read and extract tag data"},
 220         {"clone",       CmdNoralsyClone,0, "clone Noralsy tag"},
 221         {"sim",         CmdNoralsySim,  0, "simulate Noralsy tag"},
 222     {NULL, NULL, 0, NULL}
 223 };
 224
 225 int CmdLFNoralsy(const char *Cmd) {
 226         clearCommandBuffer();
 227     CmdsParse(CommandTable, Cmd);
 228     return 0;
 229 }
 230
 231 int CmdHelp(const char *Cmd) {
 232     CmdsHelp(CommandTable);
 233     return 0;
 234 }