X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/b1d615df78a3c258f2568a07fcc4d0d9ca4ab921..ff9c043da29150aa785723326537ba93ddac0614:/client/cmdlfguard.c diff --git a/client/cmdlfguard.c b/client/cmdlfguard.c index d9010a19..ddfd2963 100644 --- a/client/cmdlfguard.c +++ b/client/cmdlfguard.c @@ -15,8 +15,9 @@ int usage_lf_guard_clone(void){ 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 guard clone "); + PrintAndLog("Usage: lf guard clone "); PrintAndLog("Options :"); + PrintAndLog(" : format length 26|32|36|40"); PrintAndLog(" : 8-bit value facility code"); PrintAndLog(" : 16-bit value card number"); PrintAndLog(""); @@ -30,8 +31,9 @@ int usage_lf_guard_sim(void) { 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 guard sim "); + PrintAndLog("Usage: lf guard sim "); PrintAndLog("Options :"); + PrintAndLog(" : format length 26|32|36|40"); PrintAndLog(" : 8-bit value facility code"); PrintAndLog(" : 16-bit value card number"); PrintAndLog(""); @@ -40,44 +42,61 @@ int usage_lf_guard_sim(void) { } // Works for 26bits. -int GetGuardBits(uint32_t fc, uint32_t cn, uint8_t *guardBits) { +int GetGuardBits(uint8_t fmtlen, uint32_t fc, uint32_t cn, uint8_t *guardBits) { - // Intializes random number generator - time_t t; - srand((unsigned) time(&t)); - //uint8_t xorKey = rand() % 0xFF; uint8_t xorKey = 0x66; uint8_t i; uint8_t pre[96]; + uint8_t rawbytes[12]; memset(pre, 0x00, sizeof(pre)); + memset(rawbytes, 0x00, sizeof(rawbytes)); - // 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, wiegand, 24); - - // lets start. 12bytes of data to be produced. - uint8_t rawbytes[12]; - memset(rawbytes, 0x00, sizeof(rawbytes)); + // add format length (decimal) + switch (fmtlen) { + case 32: { + rawbytes[1] = (32 << 2); + + break; + } + case 36: { + // FC = ((ByteStream[3] & 0x7F)<<7) | (ByteStream[4]>>1); + // Card = ((ByteStream[4]&1)<<19) | (ByteStream[5]<<11) | (ByteStream[6]<<3) | (ByteStream[7]>>5); + rawbytes[1] = (36 << 2); + // Get 26 wiegand from FacilityCode, CardNumber + uint8_t wiegand[34]; + memset(wiegand, 0x00, sizeof(wiegand)); + num_to_bytebits(fc, 8, wiegand); + num_to_bytebits(cn, 26, wiegand+8); + + // add wiegand parity bits (dest, source, len) + wiegand_add_parity(pre, wiegand, 34); + break; + } + case 40: { + rawbytes[1] = (40 << 2); + break; + } + case 26: + default: { + rawbytes[1] = (26 << 2); + // 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, wiegand, 24); + break; + } + } + // 2bit checksum, unknown today, + // these two bits are the last ones of rawbyte[1], hence the LSHIFT above. + // xor key rawbytes[0] = xorKey; - - // add format length (decimal) - // len | hex | bin - // 26 | 1A | 0001 1010 - rawbytes[1] = (26 << 2); - // 36 | 24 | 0010 0100 - //rawbytes[1] = (36 << 2); - // 40 | 28 | 0010 1000 - //rawbytes[1] = (40 << 2); - // 2bit checksum, unknown today, - // these two bits are the last ones of rawbyte[1], hence the LSHIFT above. rawbytes[2] = 1; rawbytes[3] = 0; @@ -87,6 +106,7 @@ int GetGuardBits(uint32_t fc, uint32_t cn, uint8_t *guardBits) { if (g_debugMode) printf(" WIE | %s\n", sprint_hex(rawbytes, sizeof(rawbytes))); + // XOR (only works on wiegand stuff) for (i = 1; i < 12; ++i) rawbytes[i] ^= xorKey ; @@ -127,24 +147,25 @@ int CmdGuardClone(const char *Cmd) { char cmdp = param_getchar(Cmd, 0); if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_guard_clone(); - uint32_t facilitycode=0, cardnumber=0, fc = 0, cn = 0; + uint32_t facilitycode = 0, cardnumber = 0, fc = 0, cn = 0, fmtlen = 0; uint8_t i; uint8_t bs[96]; memset(bs, 0x00, sizeof(bs)); //GuardProxII - compat mode, ASK/Biphase, data rate 64, 3 data blocks - uint32_t blocks[5] = {T55x7_MODULATION_BIPHASE | T55x7_BITRATE_RF_64 | 3<>1) << T5555_BITRATE_SHIFT | 3 << T5555_MAXBLOCK_SHIFT; - if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_guard_clone(); + if (sscanf(Cmd, "%u %u %u", &fmtlen, &fc, &cn ) != 2) return usage_lf_guard_clone(); + fmtlen &= 0x7f; facilitycode = (fc & 0x000000FF); cardnumber = (cn & 0x0000FFFF); - if ( !GetGuardBits(facilitycode, cardnumber, bs)) { + if ( !GetGuardBits(fmtlen, facilitycode, cardnumber, bs)) { PrintAndLog("Error with tag bitstream generation."); return 1; } @@ -180,18 +201,19 @@ int CmdGuardSim(const char *Cmd) { char cmdp = param_getchar(Cmd, 0); if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_guard_sim(); - uint32_t facilitycode = 0, cardnumber = 0, fc = 0, cn = 0; + uint32_t facilitycode = 0, cardnumber = 0, fc = 0, cn = 0, fmtlen = 0; uint8_t clock = 64, encoding = 2, separator = 0, invert = 0; uint8_t bs[96]; memset(bs, 0x00, sizeof(bs)); - if (sscanf(Cmd, "%u %u", &fc, &cn ) != 2) return usage_lf_guard_sim(); + if (sscanf(Cmd, "%u %u %u", &fmtlen, &fc, &cn ) != 2) return usage_lf_guard_sim(); + fmtlen &= 0x7F; facilitycode = (fc & 0x000000FF); cardnumber = (cn & 0x0000FFFF); - if ( !GetGuardBits(facilitycode, cardnumber, bs)) { + if ( !GetGuardBits(fmtlen, facilitycode, cardnumber, bs)) { PrintAndLog("Error with tag bitstream generation."); return 1; }