//----------------------------------------------------------------------------- // Iceman, 2019 // // 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 GALLAGHER tag commands // ASK/MAN, RF/32, 96 bits long (unknown cs) (0x00088060) // sample Q5 , ASK RF/32, STT, 96 bits (3blocks) ( 0x9000F006) //----------------------------------------------------------------------------- #include "cmdlfgallagher.h" #include //tolower #include #include "commonutil.h" // ARRAYLEN #include "common.h" #include "cmdparser.h" // command_t #include "comms.h" #include "ui.h" #include "cmddata.h" #include "cmdlf.h" #include "lfdemod.h" // preamble test #include "protocols.h" // t55xx defines #include "cmdlft55xx.h" // clone.. #include "crc.h" // CRC8/Cardx static int CmdHelp(const char *Cmd); static int usage_lf_gallagher_clone(void) { PrintAndLogEx(NORMAL, "clone a GALLAGHER tag to a T55x7 tag."); PrintAndLogEx(NORMAL, ""); PrintAndLogEx(NORMAL, "Usage: lf gallagher clone [h] [b ]"); PrintAndLogEx(NORMAL, "Options:"); PrintAndLogEx(NORMAL, " h : this help"); PrintAndLogEx(NORMAL, " b : raw hex data. 12 bytes max"); PrintAndLogEx(NORMAL, ""); PrintAndLogEx(NORMAL, "Examples:"); PrintAndLogEx(NORMAL, " lf gallagher clone b 0FFD5461A9DA1346B2D1AC32 "); return PM3_SUCCESS; } static void descramble(uint8_t *arr, uint8_t len) { uint8_t lut[] = { 0xa3, 0xb0, 0x80, 0xc6, 0xb2, 0xf4, 0x5c, 0x6c, 0x81, 0xf1, 0xbb, 0xeb, 0x55, 0x67, 0x3c, 0x05, 0x1a, 0x0e, 0x61, 0xf6, 0x22, 0xce, 0xaa, 0x8f, 0xbd, 0x3b, 0x1f, 0x5e, 0x44, 0x04, 0x51, 0x2e, 0x4d, 0x9a, 0x84, 0xea, 0xf8, 0x66, 0x74, 0x29, 0x7f, 0x70, 0xd8, 0x31, 0x7a, 0x6d, 0xa4, 0x00, 0x82, 0xb9, 0x5f, 0xb4, 0x16, 0xab, 0xff, 0xc2, 0x39, 0xdc, 0x19, 0x65, 0x57, 0x7c, 0x20, 0xfa, 0x5a, 0x49, 0x13, 0xd0, 0xfb, 0xa8, 0x91, 0x73, 0xb1, 0x33, 0x18, 0xbe, 0x21, 0x72, 0x48, 0xb6, 0xdb, 0xa0, 0x5d, 0xcc, 0xe6, 0x17, 0x27, 0xe5, 0xd4, 0x53, 0x42, 0xf3, 0xdd, 0x7b, 0x24, 0xac, 0x2b, 0x58, 0x1e, 0xa7, 0xe7, 0x86, 0x40, 0xd3, 0x98, 0x97, 0x71, 0xcb, 0x3a, 0x0f, 0x01, 0x9b, 0x6e, 0x1b, 0xfc, 0x34, 0xa6, 0xda, 0x07, 0x0c, 0xae, 0x37, 0xca, 0x54, 0xfd, 0x26, 0xfe, 0x0a, 0x45, 0xa2, 0x2a, 0xc4, 0x12, 0x0d, 0xf5, 0x4f, 0x69, 0xe0, 0x8a, 0x77, 0x60, 0x3f, 0x99, 0x95, 0xd2, 0x38, 0x36, 0x62, 0xb7, 0x32, 0x7e, 0x79, 0xc0, 0x46, 0x93, 0x2f, 0xa5, 0xba, 0x5b, 0xaf, 0x52, 0x1d, 0xc3, 0x75, 0xcf, 0xd6, 0x4c, 0x83, 0xe8, 0x3d, 0x30, 0x4e, 0xbc, 0x08, 0x2d, 0x09, 0x06, 0xd9, 0x25, 0x9e, 0x89, 0xf2, 0x96, 0x88, 0xc1, 0x8c, 0x94, 0x0b, 0x28, 0xf0, 0x47, 0x63, 0xd5, 0xb3, 0x68, 0x56, 0x9c, 0xf9, 0x6f, 0x41, 0x50, 0x85, 0x8b, 0x9d, 0x59, 0xbf, 0x9f, 0xe2, 0x8e, 0x6a, 0x11, 0x23, 0xa1, 0xcd, 0xb5, 0x7d, 0xc7, 0xa9, 0xc8, 0xef, 0xdf, 0x02, 0xb8, 0x03, 0x6b, 0x35, 0x3e, 0x2c, 0x76, 0xc9, 0xde, 0x1c, 0x4b, 0xd1, 0xed, 0x14, 0xc5, 0xad, 0xe9, 0x64, 0x4a, 0xec, 0x8d, 0xf7, 0x10, 0x43, 0x78, 0x15, 0x87, 0xe4, 0xd7, 0x92, 0xe1, 0xee, 0xe3, 0x90 }; for (int i = 0; i < len; i++) { arr[i] = lut[arr[i]]; } } //see ASK/MAN Demod for what args are accepted static int CmdGallagherDemod(const char *Cmd) { (void)Cmd; bool st = true; if (ASKDemod_ext("32 0 0 0", false, false, 1, &st) != PM3_SUCCESS) { PrintAndLogEx(DEBUG, "DEBUG: Error - GALLAGHER: ASKDemod failed"); return PM3_ESOFT; } size_t size = DemodBufferLen; int ans = detectGallagher(DemodBuffer, &size); if (ans < 0) { if (ans == -1) PrintAndLogEx(DEBUG, "DEBUG: Error - GALLAGHER: too few bits found"); else if (ans == -2) PrintAndLogEx(DEBUG, "DEBUG: Error - GALLAGHER: preamble not found"); else if (ans == -3) PrintAndLogEx(DEBUG, "DEBUG: Error - GALLAGHER: Size not correct: %zu", size); else PrintAndLogEx(DEBUG, "DEBUG: Error - GALLAGHER: ans: %d", ans); return PM3_ESOFT; } setDemodBuff(DemodBuffer, 96, ans); setClockGrid(g_DemodClock, g_DemodStartIdx + (ans * g_DemodClock)); //got a good demod uint32_t raw1 = bytebits_to_byte(DemodBuffer, 32); uint32_t raw2 = bytebits_to_byte(DemodBuffer + 32, 32); uint32_t raw3 = bytebits_to_byte(DemodBuffer + 64, 32); // bytes uint8_t arr[8] = {0}; for (int i = 0, pos = 0; i < ARRAYLEN(arr); i++) { pos = (i * 8) + i; arr[i] = bytebits_to_byte(DemodBuffer + pos, 8); printf("%d -", pos); } printf("\n"); // crc uint8_t crc = bytebits_to_byte(DemodBuffer + 72, 8); uint8_t calc_crc = CRC8Cardx(arr, ARRAYLEN(arr)); PrintAndLogEx(INFO, " Before: %s", sprint_hex(arr, 8)); descramble(arr, ARRAYLEN(arr)); PrintAndLogEx(INFO, " After : %s", sprint_hex(arr, 8)); // 4bit region code uint8_t rc = (arr[3] & 0x0E) >> 1; // 16bit FC uint16_t fc = (arr[5] & 0x0F) << 12 | arr[1] << 4 | ((arr[7] >> 4) & 0x0F); // 24bit CN uint32_t cn = arr[0] << 16 | (arr[4] & 0x1F) << 11 | arr[2] << 3 | (arr[3] & 0xE0) >> 4; // 4bit issue level uint8_t il = arr[7] & 0x0F; PrintAndLogEx(SUCCESS, "GALLAGHER Tag Found -- Region: %u FC: %u CN: %u Issue Level: %u", rc, fc, cn, il); PrintAndLogEx(SUCCESS, " Printed: %C%u", rc + 0x40, fc); PrintAndLogEx(SUCCESS, " Raw: %08X%08X%08X", raw1, raw2, raw3); PrintAndLogEx(SUCCESS, " CRC: %02X - %02X (%s)", crc, calc_crc, (crc == calc_crc) ? "OK" : "Failed"); return PM3_SUCCESS; } static int CmdGallagherRead(const char *Cmd) { lf_read(false, 4096 * 2 + 20); return CmdGallagherDemod(Cmd); } static int CmdGallagherClone(const char *Cmd) { uint32_t blocks[4]; bool errors = false; uint8_t cmdp = 0; int datalen = 0; while (param_getchar(Cmd, cmdp) != 0x00 && !errors) { switch (tolower(param_getchar(Cmd, cmdp))) { case 'h': return usage_lf_gallagher_clone(); case 'b': { // skip first block, 3*4 = 12 bytes left uint8_t rawhex[12] = {0}; int res = param_gethex_to_eol(Cmd, cmdp + 1, rawhex, sizeof(rawhex), &datalen); if (res != 0) errors = true; for (uint8_t i = 1; i < ARRAYLEN(blocks); i++) { blocks[i] = bytes_to_num(rawhex + ((i - 1) * 4), sizeof(uint32_t)); } cmdp += 2; break; } default: PrintAndLogEx(WARNING, "Unknown parameter '%c'", param_getchar(Cmd, cmdp)); errors = true; break; } } if (errors || cmdp == 0) return usage_lf_gallagher_clone(); //Pac - compat mode, NRZ, data rate 40, 3 data blocks blocks[0] = T55x7_MODULATION_MANCHESTER | T55x7_BITRATE_RF_32 | 3 << T55x7_MAXBLOCK_SHIFT; PrintAndLogEx(INFO, "Preparing to clone Gallagher to T55x7 with raw hex"); print_blocks(blocks, ARRAYLEN(blocks)); int res = clone_t55xx_tag(blocks, ARRAYLEN(blocks)); PrintAndLogEx(SUCCESS, "Done"); PrintAndLogEx(INFO, "Hint: try " _YELLOW_("`lf gallagher read`") "to verify"); return res; } static int CmdGallagherSim(const char *Cmd) { // ASK/MAN sim. PrintAndLogEx(INFO, " To be implemented, feel free to contribute!"); return PM3_SUCCESS; } static command_t CommandTable[] = { {"help", CmdHelp, AlwaysAvailable, "This help"}, {"demod", CmdGallagherDemod, AlwaysAvailable, "Demodulate an GALLAGHER tag from the GraphBuffer"}, {"read", CmdGallagherRead, IfPm3Lf, "Attempt to read and extract tag data from the antenna"}, {"clone", CmdGallagherClone, IfPm3Lf, "clone GALLAGHER tag to T55x7"}, {"sim", CmdGallagherSim, IfPm3Lf, "simulate GALLAGHER tag"}, {NULL, NULL, NULL, NULL} }; static int CmdHelp(const char *Cmd) { (void)Cmd; // Cmd is not used so far CmdsHelp(CommandTable); return PM3_SUCCESS; } int CmdLFGallagher(const char *Cmd) { clearCommandBuffer(); return CmdsParse(CommandTable, Cmd); } // find Gallagher preamble in already demoded data int detectGallagher(uint8_t *dest, size_t *size) { if (*size < 96) return -1; //make sure buffer has data size_t startIdx = 0; uint8_t preamble[] = { 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0 }; if (!preambleSearch(dest, preamble, sizeof(preamble), size, &startIdx)) return -2; //preamble not found if (*size != 96) return -3; //wrong demoded size //return start position return (int)startIdx; } int demodGallagher(void) { return CmdGallagherDemod(""); }