git.zerfleddert.de Git - proxmark3-svn/blob - client/cmdlfpresco.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 #include <string.h>
  10 #include <inttypes.h>
  11 #include "cmdlfpresco.h"
  12 static int CmdHelp(const char *Cmd);
  13
  14 int usage_lf_presco_clone(void){
  15         PrintAndLog("clone a Presco tag to a T55x7 tag.");
  16         PrintAndLog("Usage: lf presco clone d <Card-ID> H <hex-ID> <Q5>");
  17         PrintAndLog("Options :");
  18         PrintAndLog("  d <Card-ID>   : 9 digit presco card ID");
  19         PrintAndLog("  H <hex-ID>    : 8 digit hex card number");
  20         PrintAndLog("  <Q5>          : specify write to Q5 (t5555 instead of t55x7)");
  21         PrintAndLog("");
  22         PrintAndLog("Sample  : lf presco clone d 123456789");
  23         return 0;
  24 }
  25
  26 int usage_lf_presco_sim(void) {
  27         PrintAndLog("Enables simulation of presco card with specified card number.");
  28         PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
  29         PrintAndLog("Per presco format, the card number is 9 digit number and can contain *# chars. Larger values are truncated.");
  30         PrintAndLog("");
  31         PrintAndLog("Usage:  lf presco sim d <Card-ID> or H <hex-ID>");
  32         PrintAndLog("Options :");
  33         PrintAndLog("  d <Card-ID>   : 9 digit presco card number");
  34         PrintAndLog("  H <hex-ID>    : 8 digit hex card number");
  35         PrintAndLog("");
  36         PrintAndLog("Sample  : lf presco sim d 123456789");
  37         return 0;
  38 }
  39
  40 // convert base 12 ID to sitecode & usercode & 8 bit other unknown code
  41 int GetWiegandFromPresco(const char *Cmd, uint32_t *sitecode, uint32_t *usercode, uint32_t *fullcode, bool *Q5) {
  42
  43         uint8_t val = 0;
  44         bool hex = false, errors = false;
  45         uint8_t cmdp = 0;
  46         char id[11];
  47         int stringlen = 0;
  48         memset(id, 0x00, sizeof(id));
  49
  50         while(param_getchar(Cmd, cmdp) != 0x00) {
  51                 switch(param_getchar(Cmd, cmdp)) {
  52                         case 'h':
  53                                 return -1;
  54                         case 'H':
  55                                 hex = true;
  56                                 //get hex
  57                                 *fullcode = param_get32ex(Cmd, cmdp+1, 0, 16);
  58                                 cmdp+=2;
  59                                 break;
  60                         case 'P':
  61                         case 'p':
  62                                 //param get string int param_getstr(const char *line, int paramnum, char * str)
  63                                 stringlen = param_getstr(Cmd, cmdp+1, id);
  64                                 if (stringlen < 2) return -1;
  65                                 cmdp+=2;
  66                                 break;
  67                         case 'Q':
  68                         case 'q':
  69                                 *Q5 = true;
  70                                 cmdp++;
  71                                 break;
  72                         default:
  73                                 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
  74                                 errors = 1;
  75                                 break;
  76                 }
  77                 if(errors) break;
  78         }
  79         // No args
  80         if(cmdp == 0) errors = 1;
  81
  82         //Validations
  83         if(errors) return -1;
  84
  85         if (!hex) {
  86                 for (int index =0; index < strlen(id); ++index) {
  87
  88                         // Get value from number string.
  89                         if ( id[index] == '*' ) val = 10;
  90                         if ( id[index] == '#')  val = 11;
  91                         if ( id[index] >= 0x30 && id[index] <= 0x39 )
  92                                 val = id[index] - 0x30;
  93
  94                                 *fullcode += val;
  95
  96                         // last digit is only added, not multipled.
  97                         if ( index < strlen(id)-1 )
  98                                         *fullcode *= 12;
  99                 }
 100         }
 101
 102         *usercode = *fullcode & 0x0000FFFF; //% 65566
 103         *sitecode = (*fullcode >> 24) & 0x000000FF;  // /= 16777216;
 104         return 0;
 105 }
 106
 107 // calc not certain - intended to get bitstream for programming / sim
 108 int GetPrescoBits(uint32_t fullcode, uint8_t *prescoBits) {
 109         num_to_bytebits(0x10D00000, 32, prescoBits);
 110         num_to_bytebits(0x00000000, 32, prescoBits+32);
 111         num_to_bytebits(0x00000000, 32, prescoBits+64);
 112         num_to_bytebits(fullcode  , 32, prescoBits+96);
 113         return 1;
 114 }
 115
 116 //see ASKDemod for what args are accepted
 117 int CmdPrescoDemod(const char *Cmd) {
 118         bool st = true;
 119         if (!ASKDemod_ext("32 0 0 0 0 a", FALSE, FALSE, 1, &st)) {
 120                 if (g_debugMode) PrintAndLog("DEBUG: Error Presco ASKDemod failed");
 121                 return 0;
 122         }
 123         size_t size = DemodBufferLen;
 124         //call lfdemod.c demod for Presco
 125         int ans = PrescoDemod(DemodBuffer, &size);
 126         if (ans < 0) {
 127                 if (g_debugMode){
 128                         if (ans == -1)
 129                                 PrintAndLog("DEBUG: Error - Presco: too few bits found");
 130                         else if (ans == -2)
 131                                 PrintAndLog("DEBUG: Error - Presco: preamble not found");
 132                         else if (ans == -3)
 133                                 PrintAndLog("DEBUG: Error - Presco: Size not correct: %d", size);
 134                         else
 135                                 PrintAndLog("DEBUG: Error - Presco: ans: %d", ans);
 136                 }
 137                 return 0;
 138         }
 139         setDemodBuf(DemodBuffer, 128, ans);
 140         setGrid_Clock(32);
 141
 142         //got a good demod
 143         uint32_t raw1 = bytebits_to_byte(DemodBuffer, 32);
 144         uint32_t raw2 = bytebits_to_byte(DemodBuffer+32, 32);
 145         uint32_t raw3 = bytebits_to_byte(DemodBuffer+64, 32);
 146         uint32_t raw4 = bytebits_to_byte(DemodBuffer+96, 32);
 147         uint32_t cardid = raw4;
 148         PrintAndLog("Presco Tag Found: Card ID %08X, Raw: %08X%08X%08X%08X", cardid, raw1, raw2, raw3, raw4);
 149
 150         uint32_t sitecode = 0, usercode = 0, fullcode = 0;
 151         bool Q5 = false;
 152         char cmd[12] = {0};
 153         sprintf(cmd, "H %08X", cardid);
 154         GetWiegandFromPresco(cmd, &sitecode, &usercode, &fullcode, &Q5);
 155         PrintAndLog("SiteCode %u, UserCode %u, FullCode, %08X", sitecode, usercode, fullcode);
 156         return 1;
 157 }
 158
 159 //see ASKDemod for what args are accepted
 160 int CmdPrescoRead(const char *Cmd) {
 161         //      Presco Number: 123456789 --> Sitecode 30 | usercode 8665
 162
 163         // read lf silently
 164         CmdLFRead("s");
 165         // get samples silently
 166         getSamples("12000", TRUE);
 167         // demod and output Presco ID
 168         return CmdPrescoDemod(Cmd);
 169 }
 170
 171 // takes base 12 ID converts to hex
 172 // Or takes 8 digit hex ID
 173 int CmdPrescoClone(const char *Cmd) {
 174
 175         bool Q5 = false;
 176         uint32_t sitecode=0, usercode=0, fullcode=0;
 177         uint32_t blocks[5] = {T55x7_MODULATION_MANCHESTER | T55x7_BITRATE_RF_32 | 4 << T55x7_MAXBLOCK_SHIFT | T55x7_ST_TERMINATOR, 0, 0, 0, 0};
 178
 179         // get wiegand from printed number.
 180         if (GetWiegandFromPresco(Cmd, &sitecode, &usercode, &fullcode, &Q5) == -1) return usage_lf_presco_clone();
 181
 182         if (Q5)
 183                 //t5555 (Q5) BITRATE = (RF-2)/2 (iceman)
 184                 blocks[0] = T5555_MODULATION_MANCHESTER | ((32-2)>>1) << T5555_BITRATE_SHIFT | 4 << T5555_MAXBLOCK_SHIFT | T5555_ST_TERMINATOR;
 185
 186         if ((sitecode & 0xFF) != sitecode) {
 187                 sitecode &= 0xFF;
 188                 PrintAndLog("Facility-Code Truncated to 8-bits (Presco): %u", sitecode);
 189         }
 190
 191         if ((usercode & 0xFFFF) != usercode) {
 192                 usercode &= 0xFFFF;
 193                 PrintAndLog("Card Number Truncated to 16-bits (Presco): %u", usercode);
 194         }
 195
 196         blocks[1] = 0x10D00000; //preamble
 197         blocks[2] = 0x00000000;
 198         blocks[3] = 0x00000000;
 199         blocks[4] = fullcode;
 200
 201         PrintAndLog("Preparing to clone Presco to T55x7 with SiteCode: %u, UserCode: %u, FullCode: %08x", sitecode, usercode, fullcode);
 202         PrintAndLog("Blk | Data ");
 203         PrintAndLog("----+------------");
 204         PrintAndLog(" 00 | 0x%08x", blocks[0]);
 205         PrintAndLog(" 01 | 0x%08x", blocks[1]);
 206         PrintAndLog(" 02 | 0x%08x", blocks[2]);
 207         PrintAndLog(" 03 | 0x%08x", blocks[3]);
 208         PrintAndLog(" 04 | 0x%08x", blocks[4]);
 209
 210         UsbCommand resp;
 211         UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
 212
 213         for (int i=4; i>=0; i--) {
 214                 c.arg[0] = blocks[i];
 215                 c.arg[1] = i;
 216                 clearCommandBuffer();
 217                 SendCommand(&c);
 218                 if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)){
 219                         PrintAndLog("Error occurred, device did not respond during write operation.");
 220                         return -1;
 221                 }
 222         }
 223     return 0;
 224 }
 225
 226 // takes base 12 ID converts to hex
 227 // Or takes 8 digit hex ID
 228 int CmdPrescoSim(const char *Cmd) {
 229         uint32_t sitecode=0, usercode=0, fullcode=0;
 230         bool Q5=false;
 231         // get wiegand from printed number.
 232         if (GetWiegandFromPresco(Cmd, &sitecode, &usercode, &fullcode, &Q5) == -1) return usage_lf_presco_sim();
 233
 234         uint8_t clk = 32, encoding = 1, separator = 1, invert = 0;
 235         uint16_t arg1, arg2;
 236         size_t size = 128;
 237         arg1 = clk << 8 | encoding;
 238         arg2 = invert << 8 | separator;
 239
 240         PrintAndLog("Simulating Presco - SiteCode: %u, UserCode: %u, FullCode: %08X",sitecode, usercode, fullcode);
 241
 242         UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
 243         GetPrescoBits(fullcode, c.d.asBytes);
 244         clearCommandBuffer();
 245         SendCommand(&c);
 246         return 0;
 247 }
 248
 249 static command_t CommandTable[] = {
 250     {"help",    CmdHelp,                1, "This help"},
 251         {"read",        CmdPrescoRead,  0, "Attempt to read and Extract tag data"},
 252         {"clone",       CmdPrescoClone, 0, "d <9 digit ID> or h <hex> [Q5] clone presco tag"},
 253         {"sim",         CmdPrescoSim,   0, "d <9 digit ID> or h <hex> simulate presco tag"},
 254     {NULL, NULL, 0, NULL}
 255 };
 256
 257 int CmdLFPresco(const char *Cmd) {
 258         clearCommandBuffer();
 259     CmdsParse(CommandTable, Cmd);
 260     return 0;
 261 }
 262
 263 int CmdHelp(const char *Cmd) {
 264     CmdsHelp(CommandTable);
 265     return 0;
 266 }