git.zerfleddert.de Git - proxmark3-svn/blob - client/cmdlfpyramid.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 Farpoint / Pyramid tag commands
   8 //-----------------------------------------------------------------------------
   9 #include <string.h>
  10 #include <inttypes.h>
  11 #include "cmdlfpyramid.h"
  12 static int CmdHelp(const char *Cmd);
  13
  14 int usage_lf_pyramid_clone(void){
  15         PrintAndLog("clone a Farpointe/Pyramid tag to a T55x7 tag.");
  16         PrintAndLog("The facility-code is 8-bit and the card number is 16-bit.  Larger values are truncated. ");
  17         PrintAndLog("Currently work only on 26bit");
  18         PrintAndLog("");
  19         PrintAndLog("Usage: lf pyramid clone <Facility-Code> <Card-Number>");
  20         PrintAndLog("Options :");
  21         PrintAndLog("  <Facility-Code> :  8-bit value facility code");
  22         PrintAndLog("  <Card Number>   : 16-bit value card number");
  23         PrintAndLog("");
  24         PrintAndLog("Sample  : lf pyramid clone 123 11223");
  25         return 0;
  26 }
  27
  28 int usage_lf_pyramid_sim(void) {
  29         PrintAndLog("Enables simulation of Farpointe/Pyramid card with specified card number.");
  30         PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
  31         PrintAndLog("The facility-code is 8-bit and the card number is 16-bit.  Larger values are truncated.");
  32         PrintAndLog("Currently work only on 26bit");
  33         PrintAndLog("");
  34         PrintAndLog("Usage:  lf pyramid sim <Card-Number>");
  35         PrintAndLog("Options :");
  36         PrintAndLog("  <Facility-Code> :  8-bit value facility code");
  37         PrintAndLog("  <Card Number>   : 16-bit value card number");
  38         PrintAndLog("");
  39         PrintAndLog("Sample  : lf pyramid sim 123 11223");
  40         return 0;
  41 }
  42
  43
  44 // Works for 26bits.
  45 int GetPyramidBits(uint32_t fc, uint32_t cn, uint8_t *pyramidBits) {
  46
  47         uint8_t pre[128];
  48         memset(pre, 0x00, sizeof(pre));
  49
  50         // format start bit
  51         pre[79] = 1;
  52
  53         // Get 26 wiegand from FacilityCode, CardNumber
  54         uint8_t wiegand[24];
  55         memset(wiegand, 0x00, sizeof(wiegand));
  56         num_to_bytebits(fc, 8, wiegand);
  57         num_to_bytebits(cn, 16, wiegand+8);
  58
  59         // add wiegand parity bits (dest, source, len)
  60         wiegand_add_parity(pre+80, wiegand, 24);
  61
  62         // add paritybits       (bitsource, dest, sourcelen, paritylen, parityType (odd, even,)
  63         addParity(pre+8, pyramidBits+8, 112, 8, 1);
  64
  65         // add checksum
  66         uint8_t csBuff[13];
  67         for (uint8_t i = 0; i < 13; i++)
  68                 csBuff[i] = bytebits_to_byte(pyramidBits + 16 + (i*8), 8);
  69
  70         uint32_t crc = CRC8Maxim(csBuff, 13);
  71         num_to_bytebits(crc, 8, pyramidBits+120);
  72
  73         return 1;
  74 }
  75
  76 int CmdPyramidRead(const char *Cmd) {
  77         CmdLFRead("s");
  78         getSamples("30000",false);
  79         return CmdFSKdemodPyramid("");
  80 }
  81
  82 int CmdPyramidClone(const char *Cmd) {
  83
  84         char cmdp = param_getchar(Cmd, 0);
  85         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_pyramid_clone();
  86
  87         uint32_t facilitycode=0, cardnumber=0, fc = 0, cn = 0;
  88         uint8_t i;
  89         uint8_t bs[128];
  90         memset(bs, 0x00, sizeof(bs));
  91
  92         //Pyramid - compat mode, FSK2a, data rate 50, 4 data blocks
  93         uint32_t blocks[5] = {T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 4<<T55x7_MAXBLOCK_SHIFT, 0, 0, 0, 0};
  94
  95 //      if (param_getchar(Cmd, 3) == 'Q' || param_getchar(Cmd, 3) == 'q')
  96 //              blocks[0] = T5555_MODULATION_FSK2 | 50<<T5555_BITRATE_SHIFT | 4<<T5555_MAXBLOCK_SHIFT;
  97
  98         if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_pyramid_clone();
  99
 100         facilitycode = (fc & 0x000000FF);
 101         cardnumber = (cn & 0x0000FFFF);
 102
 103         if ( !GetPyramidBits(facilitycode, cardnumber, bs)) {
 104                 PrintAndLog("Error with tag bitstream generation.");
 105                 return 1;
 106         }
 107
 108         blocks[1] = bytebits_to_byte(bs,32);
 109         blocks[2] = bytebits_to_byte(bs+32,32);
 110         blocks[3] = bytebits_to_byte(bs+64,32);
 111         blocks[4] = bytebits_to_byte(bs+96,32);
 112
 113         PrintAndLog("Preparing to clone Farpointe/Pyramid to T55x7 with Facility Code: %u, Card Number: %u", facilitycode, cardnumber);
 114         PrintAndLog("Blk | Data ");
 115         PrintAndLog("----+------------");
 116         for ( i = 0; i<5; ++i )
 117                 PrintAndLog(" %02d | %08x", i, blocks[i]);
 118
 119         UsbCommand resp;
 120         UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
 121
 122         for ( i = 0; i<5; ++i ) {
 123                 c.arg[0] = blocks[i];
 124                 c.arg[1] = i;
 125                 clearCommandBuffer();
 126                 SendCommand(&c);
 127                 if (!WaitForResponseTimeout(CMD_ACK, &resp, 1000)){
 128                         PrintAndLog("Error occurred, device did not respond during write operation.");
 129                         return -1;
 130                 }
 131         }
 132     return 0;
 133 }
 134
 135 int CmdPyramidSim(const char *Cmd) {
 136
 137         char cmdp = param_getchar(Cmd, 0);
 138         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_pyramid_sim();
 139
 140         uint32_t facilitycode = 0, cardnumber = 0, fc = 0, cn = 0;
 141
 142         uint8_t bs[128];
 143         size_t size = sizeof(bs);
 144         memset(bs, 0x00, size);
 145
 146         // Pyramid uses:  fcHigh: 10, fcLow: 8, clk: 50, invert: 0
 147         uint64_t arg1, arg2;
 148         arg1 = (10 << 8) + 8;
 149         arg2 = 50 | 0;
 150
 151         if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_pyramid_sim();
 152
 153         facilitycode = (fc & 0x000000FF);
 154         cardnumber = (cn & 0x0000FFFF);
 155
 156         if ( !GetPyramidBits(facilitycode, cardnumber, bs)) {
 157                 PrintAndLog("Error with tag bitstream generation.");
 158                 return 1;
 159         }
 160
 161         PrintAndLog("Simulating Farpointe/Pyramid - Facility Code: %u, CardNumber: %u", facilitycode, cardnumber );
 162
 163         UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
 164         memcpy(c.d.asBytes, bs, size);
 165         clearCommandBuffer();
 166         SendCommand(&c);
 167         return 0;
 168 }
 169
 170 static command_t CommandTable[] = {
 171     {"help",    CmdHelp,                1, "This help"},
 172         {"read",        CmdPyramidRead,  0, "Attempt to read and extract tag data"},
 173         {"clone",       CmdPyramidClone, 0, "<Facility-Code> <Card Number>  clone pyramid tag"},
 174         {"sim",         CmdPyramidSim,   0, "<Facility-Code> <Card Number>  simulate pyramid tag"},
 175     {NULL, NULL, 0, NULL}
 176 };
 177
 178 int CmdLFPyramid(const char *Cmd) {
 179         clearCommandBuffer();
 180     CmdsParse(CommandTable, Cmd);
 181     return 0;
 182 }
 183
 184 int CmdHelp(const char *Cmd) {
 185     CmdsHelp(CommandTable);
 186     return 0;
 187 }