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