//-----------------------------------------------------------------------------
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// Low frequency Farpoint / Pyramid tag commands
// FSK2a, rf/50, 128 bits (complete)
//-----------------------------------------------------------------------------
#include "cmdlfpyramid.h"
static int CmdHelp(const char *Cmd);
int usage_lf_pyramid_clone(void){
PrintAndLog("clone a Farpointe/Pyramid tag to a T55x7 tag.");
PrintAndLog("The facility-code is 8-bit and the card number is 16-bit. Larger values are truncated. ");
PrintAndLog("Currently only works on 26bit");
PrintAndLog("");
PrintAndLog("Usage: lf pyramid clone [h] <Facility-Code> <Card-Number> [Q5]");
PrintAndLog("Options :");
PrintAndLog(" h : this help");
PrintAndLog(" <Facility-Code> : 8-bit value facility code");
PrintAndLog(" <Card Number> : 16-bit value card number");
PrintAndLog(" Q5 : optional - clone to Q5 (T5555) instead of T55x7 chip");
PrintAndLog("");
PrintAndLog("Sample : lf pyramid clone 123 11223");
return 0;
}
int usage_lf_pyramid_sim(void) {
PrintAndLog("Enables simulation of Farpointe/Pyramid card with specified card number.");
PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
PrintAndLog("The facility-code is 8-bit and the card number is 16-bit. Larger values are truncated.");
PrintAndLog("Currently work only on 26bit");
PrintAndLog("");
PrintAndLog("Usage: lf pyramid sim [h] <Facility-Code> <Card-Number>");
PrintAndLog("Options :");
PrintAndLog(" h : this help");
PrintAndLog(" <Facility-Code> : 8-bit value facility code");
PrintAndLog(" <Card Number> : 16-bit value card number");
PrintAndLog("");
PrintAndLog("Sample : lf pyramid sim 123 11223");
return 0;
}
// by marshmellow
// FSK Demod then try to locate a Farpointe Data (pyramid) ID
int detectPyramid(uint8_t *dest, size_t *size, int *waveStartIdx) {
//make sure buffer has data
if (*size < 128*50) return -1;
//test samples are not just noise
signal_t *sp = getSignalProperties();
if (sp->isnoise) return -2;
// FSK demodulator RF/50 FSK 10,8
*size = fskdemod(dest, *size, 50, 0, 10, 8, waveStartIdx); // pyramid fsk2
//did we get a good demod?
if (*size < 128) return -3;
size_t startIdx = 0;
uint8_t preamble[] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1};
if (!preambleSearch(dest, preamble, sizeof(preamble), size, &startIdx))
return -4; //preamble not found
// wrong size? (between to preambles)
if (*size != 128) return -5;
return (int)startIdx;
}
// Works for 26bits.
int GetPyramidBits(uint32_t fc, uint32_t cn, uint8_t *pyramidBits) {
uint8_t pre[128];
memset(pre, 0x00, sizeof(pre));
// format start bit
pre[79] = 1;
// Get 26 wiegand from FacilityCode, CardNumber
uint8_t wiegand[24];
memset(wiegand, 0x00, sizeof(wiegand));
num_to_bytebits(fc, 8, wiegand);
num_to_bytebits(cn, 16, wiegand+8);
// add wiegand parity bits (dest, source, len)
wiegand_add_parity(pre+80, wiegand, 24);
// add paritybits (bitsource, dest, sourcelen, paritylen, parityType (odd, even,)
addParity(pre+8, pyramidBits+8, 102, 8, 1);
// add checksum
uint8_t csBuff[13];
for (uint8_t i = 0; i < 13; i++)
csBuff[i] = bytebits_to_byte(pyramidBits + 16 + (i*8), 8);
uint32_t crc = CRC8Maxim(csBuff, 13);
num_to_bytebits(crc, 8, pyramidBits+120);
return 1;
}
//by marshmellow
//Pyramid Prox demod - FSK RF/50 with preamble of 0000000000000001 (always a 128 bit data stream)
//print full Farpointe Data/Pyramid Prox ID and some bit format details if found
int CmdPyramidDemod(const char *Cmd) {
//raw fsk demod no manchester decoding no start bit finding just get binary from wave
uint8_t bits[MAX_GRAPH_TRACE_LEN]={0};
size_t size = getFromGraphBuf(bits);
if (size==0) {
PrintAndLog("DEBUG: Error - Pyramid not enough samples");
return 0;
}
//get binary from fsk wave
int waveIdx=0;
int idx = detectPyramid(bits, &size, &waveIdx);
if (idx < 0){
if (g_debugMode){
if (idx == -1)
PrintAndLog("DEBUG: Error - Pyramid: not enough samples");
else if (idx == -2)
PrintAndLog("DEBUG: Error - Pyramid: only noise found");
else if (idx == -3)
PrintAndLog("DEBUG: Error - Pyramid: problem during FSK demod");
else if (idx == -4)
PrintAndLog("DEBUG: Error - Pyramid: preamble not found");
else if (idx == -5)
PrintAndLog("DEBUG: Error - Pyramid: size not correct: %d", size);
else
PrintAndLog("DEBUG: Error - Pyramid: error demoding fsk idx: %d",idx);
}
return 0;
}
setDemodBuf(bits, size, idx);
setClockGrid(50, waveIdx + (idx*50));
// Index map
// 0 10 20 30 40 50 60
// | | | | | | |
// 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3
// -----------------------------------------------------------------------------
// 0000000 0 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1
// premable xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o
// 64 70 80 90 100 110 120
// | | | | | | |
// 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7
// -----------------------------------------------------------------------------
// 0000000 1 0000000 1 0000000 1 0110111 0 0011000 1 0000001 0 0001100 1 1001010 0
// xxxxxxx o xxxxxxx o xxxxxxx o xswffff o ffffccc o ccccccc o ccccccw o ppppppp o
// |---115---||---------71---------|
// s = format start bit, o = odd parity of last 7 bits
// f = facility code, c = card number
// w = wiegand parity, x = extra space for other formats
// p = CRC8maxim checksum
// (26 bit format shown)
//get bytes for checksum calc
uint8_t checksum = bytebits_to_byte(bits + idx + 120, 8);
uint8_t csBuff[14] = {0x00};
for (uint8_t i = 0; i < 13; i++){
csBuff[i] = bytebits_to_byte(bits + idx + 16 + (i*8), 8);
}
//check checksum calc
//checksum calc thanks to ICEMAN!!
uint32_t checkCS = CRC8Maxim(csBuff, 13);
//get raw ID before removing parities
uint32_t rawLo = bytebits_to_byte(bits+idx+96, 32);
uint32_t rawHi = bytebits_to_byte(bits+idx+64, 32);
uint32_t rawHi2 = bytebits_to_byte(bits+idx+32, 32);
uint32_t rawHi3 = bytebits_to_byte(bits+idx, 32);
size = removeParity(bits, idx+8, 8, 1, 120);
if (size != 105){
if (g_debugMode) {
if ( size == 0)
PrintAndLog("DEBUG: Error - Pyramid: parity check failed - IDX: %d, hi3: %08X", idx, rawHi3);
else
PrintAndLog("DEBUG: Error - Pyramid: at parity check - tag size does not match Pyramid format, SIZE: %d, IDX: %d, hi3: %08X", size, idx, rawHi3);
}
return 0;
}
// ok valid card found!
// Index map
// 0 10 20 30 40 50 60 70
// | | | | | | | |
// 01234567890123456789012345678901234567890123456789012345678901234567890
// -----------------------------------------------------------------------
// 00000000000000000000000000000000000000000000000000000000000000000000000
// xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
// 71 80 90 100
// | | | |
// 1 2 34567890 1234567890123456 7 8901234
// ---------------------------------------
// 1 1 01110011 0000000001000110 0 1001010
// s w ffffffff cccccccccccccccc w ppppppp
// |--115-| |------71------|
// s = format start bit, o = odd parity of last 7 bits
// f = facility code, c = card number
// w = wiegand parity, x = extra space for other formats
// p = CRC8-Maxim checksum
// (26 bit format shown)
//find start bit to get fmtLen
int j;
for (j=0; j < size; ++j){
if(bits[j]) break;
}
uint8_t fmtLen = size-j-8;
uint32_t fc = 0;
uint32_t cardnum = 0;
uint32_t code1 = 0;
if ( fmtLen == 26 ){
fc = bytebits_to_byte(bits+73, 8);
cardnum = bytebits_to_byte(bits+81, 16);
code1 = bytebits_to_byte(bits+72,fmtLen);
PrintAndLog("Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi3, rawHi2, rawHi, rawLo);
} else if (fmtLen == 45) {
fmtLen = 42; //end = 10 bits not 7 like 26 bit fmt
fc = bytebits_to_byte(bits+53, 10);
cardnum = bytebits_to_byte(bits+63, 32);
PrintAndLog("Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, rawHi3, rawHi2, rawHi, rawLo);
} else {
cardnum = bytebits_to_byte(bits+81, 16);
if (fmtLen>32){
//code1 = bytebits_to_byte(bits+(size-fmtLen),fmtLen-32);
//code2 = bytebits_to_byte(bits+(size-32),32);
PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
} else{
//code1 = bytebits_to_byte(bits+(size-fmtLen),fmtLen);
PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
}
}
if (checksum == checkCS)
PrintAndLog("Checksum %02x passed", checksum);
else
PrintAndLog("Checksum %02x failed - should have been %02x", checksum, checkCS);
if (g_debugMode){
PrintAndLog("DEBUG: Pyramid: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128);
printDemodBuff();
}
return 1;
}
int CmdPyramidRead(const char *Cmd) {
lf_read(true, 15000);
return CmdPyramidDemod(Cmd);
}
int CmdPyramidClone(const char *Cmd) {
char cmdp = param_getchar(Cmd, 0);
if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_pyramid_clone();
uint32_t facilitycode=0, cardnumber=0, fc = 0, cn = 0;
uint32_t blocks[5];
uint8_t bs[128];
memset(bs, 0x00, sizeof(bs));
if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_pyramid_clone();
facilitycode = (fc & 0x000000FF);
cardnumber = (cn & 0x0000FFFF);
if ( !GetPyramidBits(facilitycode, cardnumber, bs)) {
PrintAndLog("Error with tag bitstream generation.");
return 1;
}
//Pyramid - compat mode, FSK2a, data rate 50, 4 data blocks
blocks[0] = T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 4 << T55x7_MAXBLOCK_SHIFT;
// Q5
if (param_getchar(Cmd, 2) == 'Q' || param_getchar(Cmd, 2) == 'q')
blocks[0] = T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | T5555_SET_BITRATE(50) | 4 << T5555_MAXBLOCK_SHIFT;
blocks[1] = bytebits_to_byte(bs, 32);
blocks[2] = bytebits_to_byte(bs + 32, 32);
blocks[3] = bytebits_to_byte(bs + 64, 32);
blocks[4] = bytebits_to_byte(bs + 96, 32);
PrintAndLog("Preparing to clone Farpointe/Pyramid to T55x7 with Facility Code: %u, Card Number: %u", facilitycode, cardnumber);
print_blocks(blocks, 5);
UsbCommand resp;
UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0,0,0}};
for (uint8_t i = 0; i < 5; ++i ) {
c.arg[0] = blocks[i];
c.arg[1] = i;
clearCommandBuffer();
SendCommand(&c);
if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)){
PrintAndLog("Error occurred, device did not respond during write operation.");
return -1;
}
}
return 0;
}
int CmdPyramidSim(const char *Cmd) {
char cmdp = param_getchar(Cmd, 0);
if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_pyramid_sim();
uint32_t facilitycode = 0, cardnumber = 0, fc = 0, cn = 0;
uint8_t bs[128];
size_t size = sizeof(bs);
memset(bs, 0x00, size);
// Pyramid uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0
uint8_t clk = 50, invert = 0, high = 10, low = 8;
uint16_t arg1, arg2;
arg1 = high << 8 | low;
arg2 = invert << 8 | clk;
if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_pyramid_sim();
facilitycode = (fc & 0x000000FF);
cardnumber = (cn & 0x0000FFFF);
if ( !GetPyramidBits(facilitycode, cardnumber, bs)) {
PrintAndLog("Error with tag bitstream generation.");
return 1;
}
PrintAndLog("Simulating Farpointe/Pyramid - Facility Code: %u, CardNumber: %u", facilitycode, cardnumber );
UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
memcpy(c.d.asBytes, bs, size);
clearCommandBuffer();
SendCommand(&c);
return 0;
}
static command_t CommandTable[] = {
{"help", CmdHelp, 1, "this help"},
{"demod", CmdPyramidDemod,0, "demodulate a Pyramid FSK tag from the GraphBuffer"},
{"read", CmdPyramidRead, 0, "attempt to read and extract tag data"},
{"clone", CmdPyramidClone,0, "clone pyramid tag"},
{"sim", CmdPyramidSim, 0, "simulate pyramid tag"},
{NULL, NULL, 0, NULL}
};
int CmdLFPyramid(const char *Cmd) {
clearCommandBuffer();
CmdsParse(CommandTable, Cmd);
return 0;
}
int CmdHelp(const char *Cmd) {
CmdsHelp(CommandTable);
return 0;
}