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 // ASK/Manchester, rf/32, 128 bits (complete)
   9 //-----------------------------------------------------------------------------
  10 #include <string.h>
  11 #include <inttypes.h>
  12 #include <stdio.h>
  13 #include "cmdlfpresco.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_presco_clone(void){
  28         PrintAndLog("clone a Presco tag to a T55x7 tag.");
  29         PrintAndLog("Usage: lf presco clone d <Card-ID> H <hex-ID> <Q5>");
  30         PrintAndLog("Options :");
  31         PrintAndLog("  d <Card-ID>   : 9 digit presco card ID");
  32         PrintAndLog("  H <hex-ID>    : 8 digit hex card number");
  33         PrintAndLog("  <Q5>          : specify write to Q5 (t5555 instead of t55x7)");
  34         PrintAndLog("");
  35         PrintAndLog("Sample  : lf presco clone d 123456789");
  36         return 0;
  37 }
  38
  39 int usage_lf_presco_sim(void) {
  40         PrintAndLog("Enables simulation of presco card with specified card number.");
  41         PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
  42         PrintAndLog("Per presco format, the card number is 9 digit number and can contain *# chars. Larger values are truncated.");
  43         PrintAndLog("");
  44         PrintAndLog("Usage:  lf presco sim d <Card-ID> or H <hex-ID>");
  45         PrintAndLog("Options :");
  46         PrintAndLog("  d <Card-ID>   : 9 digit presco card number");
  47         PrintAndLog("  H <hex-ID>    : 8 digit hex card number");
  48         PrintAndLog("");
  49         PrintAndLog("Sample  : lf presco sim d 123456789");
  50         return 0;
  51 }
  52
  53 // convert base 12 ID to sitecode & usercode & 8 bit other unknown code
  54 int GetWiegandFromPresco(const char *Cmd, uint32_t *sitecode, uint32_t *usercode, uint32_t *fullcode, bool *Q5) {
  55
  56         uint8_t val = 0;
  57         bool hex = false, errors = false;
  58         uint8_t cmdp = 0;
  59         char id[11];
  60         int stringlen = 0;
  61         while(param_getchar(Cmd, cmdp) != 0x00) {
  62                 switch(param_getchar(Cmd, cmdp)) {
  63                         case 'h':
  64                                 return -1;
  65                         case 'H':
  66                                 hex = true;
  67                                 //get hex
  68                                 *fullcode = param_get32ex(Cmd, cmdp+1, 0, 10);
  69                                 cmdp+=2;
  70                                 break;
  71                         case 'P':
  72                         case 'p':
  73                                 //param get string int param_getstr(const char *line, int paramnum, char * str)
  74                                 stringlen = param_getstr(Cmd, cmdp+1, id);
  75                                 if (stringlen < 2) return -1;
  76                                 cmdp+=2;
  77                                 break;
  78                         case 'Q':
  79                         case 'q':
  80                                 *Q5 = true;
  81                                 cmdp++;
  82                                 break;
  83                         default:
  84                                 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
  85                                 errors = 1;
  86                                 break;
  87                 }
  88                 if(errors) break;
  89         }
  90         // No args
  91         if(cmdp == 0) errors = 1;
  92
  93         //Validations
  94         if(errors) return -1;
  95
  96         if (!hex) {
  97                 for (int index =0; index < strlen(id); ++index) {
  98                         // Get value from number string.
  99                         if ( id[index] == '*' ) val = 10;
 100                         if ( id[index] == '#')  val = 11;
 101                         if ( id[index] >= 0x30 && id[index] <= 0x39 )
 102                                 val = id[index] - 0x30;
 103
 104                         *fullcode += val;
 105
 106                         // last digit is only added, not multipled.
 107                         if ( index < strlen(id)-1 )
 108                                 *fullcode *= 12;
 109                 }
 110         }
 111
 112         *usercode = *fullcode & 0x0000FFFF; //% 65566
 113         *sitecode = (*fullcode >> 24) & 0x000000FF;  // /= 16777216;
 114         return 0;
 115 }
 116
 117 // calc not certain - intended to get bitstream for programming / sim
 118 int GetPrescoBits(uint32_t fullcode, uint8_t *prescoBits) {
 119         num_to_bytebits(0x10D00000, 32, prescoBits);
 120         num_to_bytebits(0x00000000, 32, prescoBits+32);
 121         num_to_bytebits(0x00000000, 32, prescoBits+64);
 122         num_to_bytebits(fullcode  , 32, prescoBits+96);
 123         return 1;
 124 }
 125
 126 //see ASKDemod for what args are accepted
 127 int CmdPrescoDemod(const char *Cmd) {
 128         if (!ASKDemod(Cmd, false, false, 1)) {
 129                 if (g_debugMode) PrintAndLog("ASKDemod failed");
 130                 return 0;
 131         }
 132         size_t size = DemodBufferLen;
 133         //call lfdemod.c demod for presco
 134         int ans = PrescoDemod(DemodBuffer, &size);
 135         if (ans < 0) {
 136                 if (g_debugMode) PrintAndLog("Error Presco_Demod %d", ans);
 137                 return 0;
 138         }
 139         //got a good demod
 140         uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans, 32);
 141         uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
 142         uint32_t raw3 = bytebits_to_byte(DemodBuffer+ans+64, 32);
 143         uint32_t raw4 = bytebits_to_byte(DemodBuffer+ans+96, 32);
 144         uint32_t cardid = raw4;
 145         PrintAndLog("Presco Tag Found: Card ID %08X", cardid);
 146         PrintAndLog("Raw: %08X%08X%08X%08X", raw1,raw2,raw3,raw4);
 147         setDemodBuf(DemodBuffer, 128, ans);
 148         setClockGrid(g_DemodClock, g_DemodStartIdx + (ans*g_DemodClock));
 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
 157         return 1;
 158 }
 159
 160 //see ASKDemod for what args are accepted
 161 int CmdPrescoRead(const char *Cmd) {
 162         // Presco Number: 123456789 --> Sitecode 30 | usercode 8665
 163
 164         // read lf silently
 165         lf_read(true, 10000);
 166         // demod and output Presco ID
 167         return CmdPrescoDemod(Cmd);
 168 }
 169
 170 // takes base 12 ID converts to hex
 171 // Or takes 8 digit hex ID
 172 int CmdPrescoClone(const char *Cmd) {
 173
 174         bool Q5 = false;
 175         uint32_t sitecode=0, usercode=0, fullcode=0;
 176         uint32_t blocks[5] = {T55x7_MODULATION_MANCHESTER | T55x7_BITRATE_RF_32 | 4<<T55x7_MAXBLOCK_SHIFT | T55x7_ST_TERMINATOR, 0, 0, 0, 5};
 177
 178         // get wiegand from printed number.
 179         if (GetWiegandFromPresco(Cmd, &sitecode, &usercode, &fullcode, &Q5) == -1) return usage_lf_presco_clone();
 180
 181         if (Q5)
 182                 blocks[0] = T5555_MODULATION_MANCHESTER | ((32-2)>>1)<<T5555_BITRATE_SHIFT | 4<<T5555_MAXBLOCK_SHIFT | T5555_ST_TERMINATOR;
 183
 184         if ((sitecode & 0xFF) != sitecode) {
 185                 sitecode &= 0xFF;
 186                 PrintAndLog("Facility-Code Truncated to 8-bits (Presco): %u", sitecode);
 187         }
 188
 189         if ((usercode & 0xFFFF) != usercode) {
 190                 usercode &= 0xFFFF;
 191                 PrintAndLog("Card Number Truncated to 16-bits (Presco): %u", usercode);
 192         }
 193
 194         blocks[1] = 0x10D00000; //preamble
 195         blocks[2] = 0x00000000;
 196         blocks[3] = 0x00000000;
 197         blocks[4] = fullcode;
 198
 199         PrintAndLog("Preparing to clone Presco to T55x7 with SiteCode: %u, UserCode: %u, FullCode: %08x", sitecode, usercode, fullcode);
 200         PrintAndLog("Blk | Data ");
 201         PrintAndLog("----+------------");
 202         PrintAndLog(" 00 | 0x%08x", blocks[0]);
 203         PrintAndLog(" 01 | 0x%08x", blocks[1]);
 204         PrintAndLog(" 02 | 0x%08x", blocks[2]);
 205         PrintAndLog(" 03 | 0x%08x", blocks[3]);
 206         PrintAndLog(" 04 | 0x%08x", blocks[4]);
 207
 208         UsbCommand resp;
 209         UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
 210
 211         for (int i=4; i>=0; i--) {
 212                 c.arg[0] = blocks[i];
 213                 c.arg[1] = i;
 214                 clearCommandBuffer();
 215                 SendCommand(&c);
 216                 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
 217                         PrintAndLog("Error occurred, device did not respond during write operation.");
 218                         return -1;
 219                 }
 220         }
 221         return 0;
 222 }
 223
 224 // takes base 12 ID converts to hex
 225 // Or takes 8 digit hex ID
 226 int CmdPrescoSim(const char *Cmd) {
 227         uint32_t sitecode=0, usercode=0, fullcode=0;
 228         bool Q5=false;
 229         // get wiegand from printed number.
 230         if (GetWiegandFromPresco(Cmd, &sitecode, &usercode, &fullcode, &Q5) == -1) return usage_lf_presco_sim();
 231
 232         uint8_t clk = 32, encoding = 1, separator = 1, invert = 0;
 233         uint16_t arg1, arg2;
 234         size_t size = 128;
 235         arg1 = clk << 8 | encoding;
 236         arg2 = invert << 8 | separator;
 237
 238         PrintAndLog("Simulating Presco - SiteCode: %u, UserCode: %u, FullCode: %08X",sitecode, usercode, fullcode);
 239
 240         UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
 241         GetPrescoBits(fullcode, c.d.asBytes);
 242         clearCommandBuffer();
 243         SendCommand(&c);
 244         return 0;
 245 }
 246
 247 static command_t CommandTable[] = {
 248         {"help",  CmdHelp,        1, "This help"},
 249         {"read",  CmdPrescoRead,  0, "Attempt to read and Extract tag data"},
 250         {"clone", CmdPrescoClone, 0, "d <9 digit ID> or h <hex> [Q5] clone presco tag"},
 251         {"sim",   CmdPrescoSim,   0, "d <9 digit ID> or h <hex> simulate presco tag"},
 252         {NULL, NULL, 0, NULL}
 253 };
 254
 255 int CmdLFPresco(const char *Cmd) {
 256         clearCommandBuffer();
 257     CmdsParse(CommandTable, Cmd);
 258     return 0;
 259 }
 260
 261 int CmdHelp(const char *Cmd) {
 262     CmdsHelp(CommandTable);
 263     return 0;
 264 }