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 #include "proxmark3.h"
  13 #include "ui.h"
  14 #include "util.h"
  15 #include "graph.h"
  16 #include "cmdparser.h"
  17 #include "cmddata.h"
  18 #include "cmdmain.h"
  19 #include "cmdlf.h"
  20 #include "protocols.h"  // for T55xx config register definitions
  21 #include "lfdemod.h"    // parityTest
  22
  23 static int CmdHelp(const char *Cmd);
  24
  25 int usage_lf_presco_clone(void){
  26         PrintAndLog("clone a Presco tag to a T55x7 tag.");
  27         PrintAndLog("Usage: lf presco clone d <Card-ID> H <hex-ID> <Q5>");
  28         PrintAndLog("Options :");
  29         PrintAndLog("  d <Card-ID>   : 9 digit presco card ID");
  30         PrintAndLog("  H <hex-ID>    : 8 digit hex card number");
  31         PrintAndLog("  <Q5>          : specify write to Q5 (t5555 instead of t55x7)");
  32         PrintAndLog("");
  33         PrintAndLog("Sample  : lf presco clone d 123456789");
  34         return 0;
  35 }
  36
  37 int usage_lf_presco_sim(void) {
  38         PrintAndLog("Enables simulation of presco card with specified card number.");
  39         PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
  40         PrintAndLog("Per presco format, the card number is 9 digit number and can contain *# chars. Larger values are truncated.");
  41         PrintAndLog("");
  42         PrintAndLog("Usage:  lf presco sim d <Card-ID> or H <hex-ID>");
  43         PrintAndLog("Options :");
  44         PrintAndLog("  d <Card-ID>   : 9 digit presco card number");
  45         PrintAndLog("  H <hex-ID>    : 8 digit hex card number");
  46         PrintAndLog("");
  47         PrintAndLog("Sample  : lf presco sim d 123456789");
  48         return 0;
  49 }
  50
  51 // convert base 12 ID to sitecode & usercode & 8 bit other unknown code
  52 int GetWiegandFromPresco(const char *Cmd, uint32_t *sitecode, uint32_t *usercode, uint32_t *fullcode, bool *Q5) {
  53
  54         uint8_t val = 0;
  55         bool hex = false, errors = false;
  56         uint8_t cmdp = 0;
  57         char id[11];
  58         int stringlen = 0;
  59         while(param_getchar(Cmd, cmdp) != 0x00) {
  60                 switch(param_getchar(Cmd, cmdp)) {
  61                         case 'h':
  62                                 return -1;
  63                         case 'H':
  64                                 hex = true;
  65                                 //get hex
  66                                 *fullcode = param_get32ex(Cmd, cmdp+1, 0, 10);
  67                                 cmdp+=2;
  68                                 break;
  69                         case 'P':
  70                         case 'p':
  71                                 //param get string int param_getstr(const char *line, int paramnum, char * str)
  72                                 stringlen = param_getstr(Cmd, cmdp+1, id);
  73                                 if (stringlen < 2) return -1;
  74                                 cmdp+=2;
  75                                 break;
  76                         case 'Q':
  77                         case 'q':
  78                                 *Q5 = true;
  79                                 cmdp++;
  80                                 break;
  81                         default:
  82                                 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
  83                                 errors = 1;
  84                                 break;
  85                 }
  86                 if(errors) break;
  87         }
  88         // No args
  89         if(cmdp == 0) errors = 1;
  90
  91         //Validations
  92         if(errors) return -1;
  93
  94         if (!hex) {
  95                 for (int index =0; index < strlen(id); ++index) {
  96                         // Get value from number string.
  97                         if ( id[index] == '*' ) val = 10;
  98                         if ( id[index] == '#')  val = 11;
  99                         if ( id[index] >= 0x30 && id[index] <= 0x39 )
 100                                 val = id[index] - 0x30;
 101
 102                         *fullcode += val;
 103
 104                         // last digit is only added, not multipled.
 105                         if ( index < strlen(id)-1 )
 106                                 *fullcode *= 12;
 107                 }
 108         }
 109
 110         *usercode = *fullcode & 0x0000FFFF; //% 65566
 111         *sitecode = (*fullcode >> 24) & 0x000000FF;  // /= 16777216;
 112         return 0;
 113 }
 114
 115 // calc not certain - intended to get bitstream for programming / sim
 116 int GetPrescoBits(uint32_t fullcode, uint8_t *prescoBits) {
 117         num_to_bytebits(0x10D00000, 32, prescoBits);
 118         num_to_bytebits(0x00000000, 32, prescoBits+32);
 119         num_to_bytebits(0x00000000, 32, prescoBits+64);
 120         num_to_bytebits(fullcode  , 32, prescoBits+96);
 121         return 1;
 122 }
 123
 124 //see ASKDemod for what args are accepted
 125 int CmdPrescoDemod(const char *Cmd) {
 126         if (!ASKDemod(Cmd, false, false, 1)) {
 127                 if (g_debugMode) PrintAndLog("ASKDemod failed");
 128                 return 0;
 129         }
 130         size_t size = DemodBufferLen;
 131         //call lfdemod.c demod for Viking
 132         int ans = PrescoDemod(DemodBuffer, &size);
 133         if (ans < 0) {
 134                 if (g_debugMode) PrintAndLog("Error Presco_Demod %d", ans);
 135                 return 0;
 136         }
 137         //got a good demod
 138         uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans, 32);
 139         uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
 140         uint32_t raw3 = bytebits_to_byte(DemodBuffer+ans+64, 32);
 141         uint32_t raw4 = bytebits_to_byte(DemodBuffer+ans+96, 32);
 142         uint32_t cardid = raw4;
 143         PrintAndLog("Presco Tag Found: Card ID %08X", cardid);
 144         PrintAndLog("Raw: %08X%08X%08X%08X", raw1,raw2,raw3,raw4);
 145         setDemodBuf(DemodBuffer+ans, 128, 0);
 146
 147         uint32_t sitecode = 0, usercode = 0, fullcode = 0;
 148         bool Q5=false;
 149         char cmd[12] = {0};
 150         sprintf(cmd, "H %08X", cardid);
 151         GetWiegandFromPresco(cmd, &sitecode, &usercode, &fullcode, &Q5);
 152         PrintAndLog("SiteCode %u, UserCode %u, FullCode, %08X", sitecode, usercode, fullcode);
 153
 154         return 1;
 155 }
 156
 157 //see ASKDemod for what args are accepted
 158 int CmdPrescoRead(const char *Cmd) {
 159         // Presco Number: 123456789 --> Sitecode 30 | usercode 8665
 160
 161         // read lf silently
 162         CmdLFRead("s");
 163         // get samples silently
 164         getSamples("30000",false);
 165         // demod and output Presco ID
 166         return CmdPrescoDemod(Cmd);
 167 }
 168
 169 // takes base 12 ID converts to hex
 170 // Or takes 8 digit hex ID
 171 int CmdPrescoClone(const char *Cmd) {
 172
 173         bool Q5 = false;
 174         uint32_t sitecode=0, usercode=0, fullcode=0;
 175         uint32_t blocks[5] = {T55x7_MODULATION_MANCHESTER | T55x7_BITRATE_RF_32 | 4<<T55x7_MAXBLOCK_SHIFT | T55x7_ST_TERMINATOR, 0, 0, 0, 5};
 176
 177         // get wiegand from printed number.
 178         if (GetWiegandFromPresco(Cmd, &sitecode, &usercode, &fullcode, &Q5) == -1) return usage_lf_presco_clone();
 179
 180         if (Q5)
 181                 blocks[0] = T5555_MODULATION_MANCHESTER | ((32-2)>>1)<<T5555_BITRATE_SHIFT | 4<<T5555_MAXBLOCK_SHIFT | T5555_ST_TERMINATOR;
 182
 183         if ((sitecode & 0xFF) != sitecode) {
 184                 sitecode &= 0xFF;
 185                 PrintAndLog("Facility-Code Truncated to 8-bits (Presco): %u", sitecode);
 186         }
 187
 188         if ((usercode & 0xFFFF) != usercode) {
 189                 usercode &= 0xFFFF;
 190                 PrintAndLog("Card Number Truncated to 16-bits (Presco): %u", usercode);
 191         }
 192
 193         blocks[1] = 0x10D00000; //preamble
 194         blocks[2] = 0x00000000;
 195         blocks[3] = 0x00000000;
 196         blocks[4] = fullcode;
 197
 198         PrintAndLog("Preparing to clone Presco to T55x7 with SiteCode: %u, UserCode: %u, FullCode: %08x", sitecode, usercode, fullcode);
 199         PrintAndLog("Blk | Data ");
 200         PrintAndLog("----+------------");
 201         PrintAndLog(" 00 | 0x%08x", blocks[0]);
 202         PrintAndLog(" 01 | 0x%08x", blocks[1]);
 203         PrintAndLog(" 02 | 0x%08x", blocks[2]);
 204         PrintAndLog(" 03 | 0x%08x", blocks[3]);
 205         PrintAndLog(" 04 | 0x%08x", blocks[4]);
 206
 207         UsbCommand resp;
 208         UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
 209
 210         for (int i=4; i>=0; i--) {
 211                 c.arg[0] = blocks[i];
 212                 c.arg[1] = i;
 213                 clearCommandBuffer();
 214                 SendCommand(&c);
 215                 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
 216                         PrintAndLog("Error occurred, device did not respond during write operation.");
 217                         return -1;
 218                 }
 219         }
 220         return 0;
 221 }
 222
 223 // takes base 12 ID converts to hex
 224 // Or takes 8 digit hex ID
 225 int CmdPrescoSim(const char *Cmd) {
 226         uint32_t sitecode=0, usercode=0, fullcode=0;
 227         bool Q5=false;
 228         // get wiegand from printed number.
 229         if (GetWiegandFromPresco(Cmd, &sitecode, &usercode, &fullcode, &Q5) == -1) return usage_lf_presco_sim();
 230
 231         uint8_t clk = 32, encoding = 1, separator = 1, invert = 0;
 232         uint16_t arg1, arg2;
 233         size_t size = 128;
 234         arg1 = clk << 8 | encoding;
 235         arg2 = invert << 8 | separator;
 236
 237         PrintAndLog("Simulating Presco - SiteCode: %u, UserCode: %u, FullCode: %08X",sitecode, usercode, fullcode);
 238
 239         UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
 240         GetPrescoBits(fullcode, c.d.asBytes);
 241         clearCommandBuffer();
 242         SendCommand(&c);
 243         return 0;
 244 }
 245
 246 static command_t CommandTable[] = {
 247         {"help",  CmdHelp,        1, "This help"},
 248         {"read",  CmdPrescoRead,  0, "Attempt to read and Extract tag data"},
 249         {"clone", CmdPrescoClone, 0, "d <9 digit ID> or h <hex> [Q5] clone presco tag"},
 250         {"sim",   CmdPrescoSim,   0, "d <9 digit ID> or h <hex> simulate presco tag"},
 251         {NULL, NULL, 0, NULL}
 252 };
 253
 254 int CmdLFPresco(const char *Cmd) {
 255         clearCommandBuffer();
 256     CmdsParse(CommandTable, Cmd);
 257     return 0;
 258 }
 259
 260 int CmdHelp(const char *Cmd) {
 261     CmdsHelp(CommandTable);
 262     return 0;
 263 }