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
  11 #include "cmdlfpresco.h"
  12
  13 #include <string.h>
  14 #include <inttypes.h>
  15 #include <stdio.h>
  16 #include "comms.h"
  17 #include "ui.h"
  18 #include "util.h"
  19 #include "graph.h"
  20 #include "cmdparser.h"
  21 #include "cmddata.h"
  22 #include "cmdmain.h"
  23 #include "cmdlf.h"
  24 #include "protocols.h"  // for T55xx config register definitions
  25 #include "lfdemod.h"    // parityTest
  26
  27 static int CmdHelp(const char *Cmd);
  28
  29 int usage_lf_presco_clone(void){
  30         PrintAndLog("clone a Presco tag to a T55x7 tag.");
  31         PrintAndLog("Usage: lf presco clone d <Card-ID> H <hex-ID> <Q5>");
  32         PrintAndLog("Options :");
  33         PrintAndLog("  d <Card-ID>   : 9 digit presco card ID");
  34         PrintAndLog("  H <hex-ID>    : 8 digit hex card number");
  35         PrintAndLog("  <Q5>          : specify write to Q5 (t5555 instead of t55x7)");
  36         PrintAndLog("");
  37         PrintAndLog("Sample  : lf presco clone d 123456789");
  38         return 0;
  39 }
  40
  41 int usage_lf_presco_sim(void) {
  42         PrintAndLog("Enables simulation of presco card with specified card number.");
  43         PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
  44         PrintAndLog("Per presco format, the card number is 9 digit number and can contain *# chars. Larger values are truncated.");
  45         PrintAndLog("");
  46         PrintAndLog("Usage:  lf presco sim d <Card-ID> or H <hex-ID>");
  47         PrintAndLog("Options :");
  48         PrintAndLog("  d <Card-ID>   : 9 digit presco card number");
  49         PrintAndLog("  H <hex-ID>    : 8 digit hex card number");
  50         PrintAndLog("");
  51         PrintAndLog("Sample  : lf presco sim d 123456789");
  52         return 0;
  53 }
  54
  55 // convert base 12 ID to sitecode & usercode & 8 bit other unknown code
  56 int GetWiegandFromPresco(const char *Cmd, uint32_t *sitecode, uint32_t *usercode, uint32_t *fullcode, bool *Q5) {
  57
  58         uint8_t val = 0;
  59         bool hex = false, errors = false;
  60         uint8_t cmdp = 0;
  61         char id[11];
  62         int stringlen = 0;
  63         while(param_getchar(Cmd, cmdp) != 0x00) {
  64                 switch(param_getchar(Cmd, cmdp)) {
  65                         case 'h':
  66                                 return -1;
  67                         case 'H':
  68                                 hex = true;
  69                                 //get hex
  70                                 *fullcode = param_get32ex(Cmd, cmdp+1, 0, 10);
  71                                 cmdp+=2;
  72                                 break;
  73                         case 'D':
  74                         case 'd':
  75                                 //param get string int param_getstr(const char *line, int paramnum, char * str)
  76                                 stringlen = param_getstr(Cmd, cmdp+1, id, sizeof(id));
  77                                 if (stringlen < 2) return -1;
  78                                 cmdp+=2;
  79                                 break;
  80                         case 'Q':
  81                         case 'q':
  82                                 *Q5 = true;
  83                                 cmdp++;
  84                                 break;
  85                         default:
  86                                 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
  87                                 errors = 1;
  88                                 break;
  89                 }
  90                 if(errors) break;
  91         }
  92         // No args
  93         if(cmdp == 0) errors = 1;
  94
  95         //Validations
  96         if(errors || (stringlen == 0 && !hex) ) return -1;
  97
  98         if (!hex) {
  99                 for (int index =0; index < strlen(id); ++index) {
 100                         // Get value from number string.
 101                         if ( id[index] == '*' ) val = 10;
 102                         if ( id[index] == '#')  val = 11;
 103                         if ( id[index] >= 0x30 && id[index] <= 0x39 )
 104                                 val = id[index] - 0x30;
 105
 106                         *fullcode += val;
 107
 108                         // last digit is only added, not multipled.
 109                         if ( index < strlen(id)-1 )
 110                                 *fullcode *= 12;
 111                 }
 112         }
 113
 114         *usercode = *fullcode & 0x0000FFFF; //% 65566
 115         *sitecode = (*fullcode >> 24) & 0x000000FF;  // /= 16777216;
 116         return 0;
 117 }
 118
 119 // calc not certain - intended to get bitstream for programming / sim
 120 int GetPrescoBits(uint32_t fullcode, uint8_t *prescoBits) {
 121         num_to_bytebits(0x10D00000, 32, prescoBits);
 122         num_to_bytebits(0x00000000, 32, prescoBits+32);
 123         num_to_bytebits(0x00000000, 32, prescoBits+64);
 124         num_to_bytebits(fullcode  , 32, prescoBits+96);
 125         return 1;
 126 }
 127
 128 //see ASKDemod for what args are accepted
 129 int CmdPrescoDemod(const char *Cmd) {
 130         if (!ASKDemod(Cmd, false, false, 1)) {
 131                 if (g_debugMode) PrintAndLog("ASKDemod failed");
 132                 return 0;
 133         }
 134         size_t size = DemodBufferLen;
 135         //call lfdemod.c demod for presco
 136         int ans = PrescoDemod(DemodBuffer, &size);
 137         if (ans < 0) {
 138                 if (g_debugMode) PrintAndLog("Error Presco_Demod %d", ans);
 139                 return 0;
 140         }
 141         //got a good demod
 142         uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans, 32);
 143         uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
 144         uint32_t raw3 = bytebits_to_byte(DemodBuffer+ans+64, 32);
 145         uint32_t raw4 = bytebits_to_byte(DemodBuffer+ans+96, 32);
 146         uint32_t cardid = raw4;
 147         PrintAndLog("Presco Tag Found: Card ID %08X", cardid);
 148         PrintAndLog("Raw: %08X%08X%08X%08X", raw1,raw2,raw3,raw4);
 149         setDemodBuf(DemodBuffer, 128, ans);
 150         setClockGrid(g_DemodClock, g_DemodStartIdx + (ans*g_DemodClock));
 151
 152         uint32_t sitecode = 0, usercode = 0, fullcode = 0;
 153         bool Q5=false;
 154         char cmd[12] = {0};
 155         sprintf(cmd, "H %08X", cardid);
 156         GetWiegandFromPresco(cmd, &sitecode, &usercode, &fullcode, &Q5);
 157         PrintAndLog("SiteCode %u, UserCode %u, FullCode, %08X", sitecode, usercode, fullcode);
 158
 159         return 1;
 160 }
 161
 162 //see ASKDemod for what args are accepted
 163 int CmdPrescoRead(const char *Cmd) {
 164         // Presco Number: 123456789 --> Sitecode 30 | usercode 8665
 165
 166         // read lf silently
 167         lf_read(true, 10000);
 168         // demod and output Presco ID
 169         return CmdPrescoDemod(Cmd);
 170 }
 171
 172 // takes base 12 ID converts to hex
 173 // Or takes 8 digit hex ID
 174 int CmdPrescoClone(const char *Cmd) {
 175
 176         bool Q5 = false;
 177         uint32_t sitecode=0, usercode=0, fullcode=0;
 178         uint32_t blocks[5] = {T55x7_MODULATION_MANCHESTER | T55x7_BITRATE_RF_32 | 4<<T55x7_MAXBLOCK_SHIFT | T55x7_ST_TERMINATOR, 0, 0, 0, 5};
 179
 180         // get wiegand from printed number.
 181         if (GetWiegandFromPresco(Cmd, &sitecode, &usercode, &fullcode, &Q5) == -1) return usage_lf_presco_clone();
 182
 183         if (Q5)
 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, 1000)){
 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 }