//----------------------------------------------------------------------------- // // by marshmellow // // 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" #include "common.h" #include #include #include #include #include "commonutil.h" // ARRAYLEN #include "cmdparser.h" // command_t #include "comms.h" #include "ui.h" #include "graph.h" #include "cmddata.h" #include "cmdlf.h" #include "protocols.h" // for T55xx config register definitions #include "lfdemod.h" // parityTest #include "crc.h" #include "cmdlft55xx.h" // verifywrite #include "cliparser.h" #include "cmdlfem4x05.h" // EM Defines static int CmdHelp(const char *Cmd); //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 demodPyramid(bool verbose) { (void) verbose; // unused so far //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) { PrintAndLogEx(DEBUG, "DEBUG: Error - Pyramid not enough samples"); return PM3_ESOFT; } //get binary from fsk wave int waveIdx = 0; int idx = detectPyramid(bits, &size, &waveIdx); if (idx < 0) { if (idx == -1) PrintAndLogEx(DEBUG, "DEBUG: Error - Pyramid: not enough samples"); else if (idx == -2) PrintAndLogEx(DEBUG, "DEBUG: Error - Pyramid: only noise found"); else if (idx == -3) PrintAndLogEx(DEBUG, "DEBUG: Error - Pyramid: problem during FSK demod"); else if (idx == -4) PrintAndLogEx(DEBUG, "DEBUG: Error - Pyramid: preamble not found"); else if (idx == -5) PrintAndLogEx(DEBUG, "DEBUG: Error - Pyramid: size not correct: %zu", size); else PrintAndLogEx(DEBUG, "DEBUG: Error - Pyramid: error demoding fsk idx: %d", idx); return PM3_ESOFT; } setDemodBuff(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 (size == 0) PrintAndLogEx(DEBUG, "DEBUG: Error - Pyramid: parity check failed - IDX: %d, hi3: %08X", idx, rawHi3); else PrintAndLogEx(DEBUG, "DEBUG: Error - Pyramid: at parity check - tag size does not match Pyramid format, SIZE: %zu, IDX: %d, hi3: %08X", size, idx, rawHi3); return PM3_ESOFT; } // 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; if (fmtLen == 26) { uint32_t fc = bytebits_to_byte(bits + 73, 8); uint32_t cardnum = bytebits_to_byte(bits + 81, 16); uint32_t code1 = bytebits_to_byte(bits + 72, fmtLen); PrintAndLogEx(SUCCESS, "Pyramid - len: " _GREEN_("%d") ", FC: " _GREEN_("%d") " Card: " _GREEN_("%d") " - Wiegand: " _GREEN_("%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 uint32_t fc = bytebits_to_byte(bits + 53, 10); uint32_t cardnum = bytebits_to_byte(bits + 63, 32); PrintAndLogEx(SUCCESS, "Pyramid - len: " _GREEN_("%d") ", FC: " _GREEN_("%d") " Card: " _GREEN_("%d") ", Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, rawHi3, rawHi2, rawHi, rawLo); /* } else if (fmtLen > 32) { uint32_t cardnum = bytebits_to_byte(bits + 81, 16); //uint32_t code1 = bytebits_to_byte(bits+(size-fmtLen),fmtLen-32); //code2 = bytebits_to_byte(bits+(size-32),32); PrintAndLogEx(SUCCESS, "Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo); */ } else { uint32_t cardnum = bytebits_to_byte(bits + 81, 16); //uint32_t code1 = bytebits_to_byte(bits+(size-fmtLen),fmtLen); PrintAndLogEx(SUCCESS, "Pyramid - len: " _GREEN_("%d") " -unknown- Card: " _GREEN_("%d") ", Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo); } PrintAndLogEx(DEBUG, "DEBUG: Pyramid: checksum : 0x%02X - 0x%02X - %s" , checksum , checkCS , (checksum == checkCS) ? _GREEN_("ok") : _RED_("fail") ); PrintAndLogEx(DEBUG, "DEBUG: Pyramid: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128); if (g_debugMode) { printDemodBuff(0, false, false, false); } return PM3_SUCCESS; } static int CmdPyramidDemod(const char *Cmd) { CLIParserContext *ctx; CLIParserInit(&ctx, "lf pyramid demod", "Try to find Farpoint/Pyramid preamble, if found decode / descramble data", "lf pyramid demod" ); void *argtable[] = { arg_param_begin, arg_param_end }; CLIExecWithReturn(ctx, Cmd, argtable, true); CLIParserFree(ctx); return demodPyramid(true); } static int CmdPyramidReader(const char *Cmd) { CLIParserContext *ctx; CLIParserInit(&ctx, "lf pyramid reader", "read a Farpointe/Pyramid tag", "lf pyramid reader -@ -> continuous reader mode" ); void *argtable[] = { arg_param_begin, arg_lit0("@", NULL, "optional - continuous reader mode"), arg_param_end }; CLIExecWithReturn(ctx, Cmd, argtable, true); bool cm = arg_get_lit(ctx, 1); CLIParserFree(ctx); if (cm) { PrintAndLogEx(INFO, "Press " _GREEN_("") " to exit"); } do { lf_read(false, 15000); demodPyramid(true); } while (cm && !kbd_enter_pressed()); return PM3_SUCCESS; } static int CmdPyramidClone(const char *Cmd) { CLIParserContext *ctx; CLIParserInit(&ctx, "lf pyramid clone", "clone a Farpointe/Pyramid tag to a T55x7, Q5/T5555 or EM4305/4469 tag.\n" "The facility-code is 8-bit and the card number is 16-bit. Larger values are truncated.\n" "Currently only works on 26bit", "lf pyramid clone --fc 123 --cn 11223\n" "lf pyramid clone --fc 123 --cn 11223 --q5 -> encode for Q5/T5555 tag\n" "lf pyramid clone --fc 123 --cn 11223 --em -> encode for EM4305/4469" ); void *argtable[] = { arg_param_begin, arg_u64_1(NULL, "fc", "", "8-bit value facility code"), arg_u64_1(NULL, "cn", "", "16-bit value card number"), arg_lit0(NULL, "q5", "optional - specify writing to Q5/T5555 tag"), arg_lit0(NULL, "em", "optional - specify writing to EM4305/4469 tag"), arg_param_end }; CLIExecWithReturn(ctx, Cmd, argtable, false); uint32_t fc = arg_get_u32_def(ctx, 1, 0); uint32_t cn = arg_get_u32_def(ctx, 2, 0); bool q5 = arg_get_lit(ctx, 3); bool em = arg_get_lit(ctx, 4); CLIParserFree(ctx); if (q5 && em) { PrintAndLogEx(FAILED, "Can't specify both Q5 and EM4305 at the same time"); return PM3_EINVARG; } uint32_t blocks[5]; uint8_t *bs = calloc(128, sizeof(uint8_t)); if (bs == NULL) { return PM3_EMALLOC; } uint32_t facilitycode = (fc & 0x000000FF); uint32_t cardnumber = (cn & 0x0000FFFF); if (getPyramidBits(facilitycode, cardnumber, bs) != PM3_SUCCESS) { PrintAndLogEx(ERR, "Error with tag bitstream generation."); return PM3_ESOFT; } //Pyramid - compat mode, FSK2a, data rate 50, 4 data blocks blocks[0] = T55x7_MODULATION_FSK2a | T55x7_BITRATE_RF_50 | 4 << T55x7_MAXBLOCK_SHIFT; char cardtype[16] = {"T55x7"}; // Q5 if (q5) { blocks[0] = T5555_FIXED | T5555_MODULATION_FSK2 | T5555_INVERT_OUTPUT | T5555_SET_BITRATE(50) | 4 << T5555_MAXBLOCK_SHIFT; snprintf(cardtype, sizeof(cardtype), "Q5/T5555"); } // EM4305 if (em) { blocks[0] = EM4305_PYRAMID_CONFIG_BLOCK; snprintf(cardtype, sizeof(cardtype), "EM4305/4469"); } 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); free(bs); PrintAndLogEx(INFO, "Preparing to clone Farpointe/Pyramid to " _YELLOW_("%s") " with Facility Code: %u, Card Number: %u", cardtype, facilitycode, cardnumber); print_blocks(blocks, ARRAYLEN(blocks)); int res; if (em) { res = em4x05_clone_tag(blocks, ARRAYLEN(blocks), 0, false); } else { res = clone_t55xx_tag(blocks, ARRAYLEN(blocks)); } PrintAndLogEx(SUCCESS, "Done"); PrintAndLogEx(HINT, "Hint: try " _YELLOW_("`lf pyramid reader`") " to verify"); return res; } static int CmdPyramidSim(const char *Cmd) { CLIParserContext *ctx; CLIParserInit(&ctx, "lf pyramid sim", "Enables simulation of Farpointe/Pyramid card with specified card number.\n" "Simulation runs until the button is pressed or another USB command is issued.\n" "The facility-code is 8-bit and the card number is 16-bit. Larger values are truncated.\n" "Currently work only on 26bit", "lf pyramid sim --fc 123 --cn 1337" ); void *argtable[] = { arg_param_begin, arg_u64_1(NULL, "fc", "", "8-bit value facility code"), arg_u64_1(NULL, "cn", "", "16-bit value card number"), arg_param_end }; CLIExecWithReturn(ctx, Cmd, argtable, false); uint32_t fc = arg_get_u32_def(ctx, 1, 0); uint32_t cn = arg_get_u32_def(ctx, 2, 0); CLIParserFree(ctx); uint32_t facilitycode = (fc & 0x000000FF); uint32_t cardnumber = (cn & 0x0000FFFF); uint8_t bs[128]; memset(bs, 0x00, sizeof(bs)); if (getPyramidBits(facilitycode, cardnumber, bs) != PM3_SUCCESS) { PrintAndLogEx(ERR, "Error with tag bitstream generation."); return PM3_ESOFT; } PrintAndLogEx(SUCCESS, "Simulating Farpointe/Pyramid - Facility Code: " _YELLOW_("%u") ", CardNumber: " _YELLOW_("%u"), facilitycode, cardnumber); // Pyramid uses: fcHigh: 10, fcLow: 8, clk: 50, invert: 0 lf_fsksim_t *payload = calloc(1, sizeof(lf_fsksim_t) + sizeof(bs)); payload->fchigh = 10; payload->fclow = 8; payload->separator = 0; payload->clock = 50; memcpy(payload->data, bs, sizeof(bs)); clearCommandBuffer(); SendCommandNG(CMD_LF_FSK_SIMULATE, (uint8_t *)payload, sizeof(lf_fsksim_t) + sizeof(bs)); free(payload); PacketResponseNG resp; WaitForResponse(CMD_LF_FSK_SIMULATE, &resp); PrintAndLogEx(INFO, "Done"); if (resp.status != PM3_EOPABORTED) return resp.status; return PM3_SUCCESS; } static command_t CommandTable[] = { {"help", CmdHelp, AlwaysAvailable, "this help"}, {"demod", CmdPyramidDemod, AlwaysAvailable, "demodulate a Pyramid FSK tag from the GraphBuffer"}, {"reader", CmdPyramidReader, IfPm3Lf, "attempt to read and extract tag data"}, {"clone", CmdPyramidClone, IfPm3Lf, "clone pyramid tag to T55x7 or Q5/T5555"}, {"sim", CmdPyramidSim, IfPm3Lf, "simulate pyramid tag"}, {NULL, NULL, NULL, NULL} }; int CmdLFPyramid(const char *Cmd) { clearCommandBuffer(); return CmdsParse(CommandTable, Cmd); } int CmdHelp(const char *Cmd) { (void)Cmd; // Cmd is not used so far CmdsHelp(CommandTable); return PM3_SUCCESS; } // 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 PM3_SUCCESS; } // 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 if (getSignalProperties()->isnoise) return -2; // FSK demodulator RF/50 FSK 10,8 *size = fskdemod(dest, *size, 50, 1, 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; }