X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/ec56429002dbccf8af357253a758ec88f359a21e..9c09e006d667665f7e81eaddfd977a55442854ff:/client/cmdlfem4x.c?ds=sidebyside diff --git a/client/cmdlfem4x.c b/client/cmdlfem4x.c index 537712f4..22b12aa4 100644 --- a/client/cmdlfem4x.c +++ b/client/cmdlfem4x.c @@ -11,16 +11,28 @@ #include #include #include -#include "proxusb.h" +#include "proxmark3.h" #include "ui.h" +#include "util.h" #include "graph.h" #include "cmdparser.h" #include "cmddata.h" #include "cmdlf.h" #include "cmdlfem4x.h" +char *global_em410xId; static int CmdHelp(const char *Cmd); +int CmdEMdemodASK(const char *Cmd) +{ + char cmdp = param_getchar(Cmd, 0); + int findone = (cmdp == '1') ? 1 : 0; + UsbCommand c={CMD_EM410X_DEMOD}; + c.arg[0]=findone; + SendCommand(&c); + return 0; +} + /* Read the ID of an EM410x tag. * Format: * 1111 1111 1 <-- standard non-repeatable header @@ -31,159 +43,45 @@ static int CmdHelp(const char *Cmd); */ int CmdEM410xRead(const char *Cmd) { - int i, j, clock, header, rows, bit, hithigh, hitlow, first, bit2idx, high, low; - int parity[4]; - char id[11]; - int retested = 0; - uint8_t BitStream[MAX_GRAPH_TRACE_LEN]; - high = low = 0; - - /* Detect high and lows and clock */ - for (i = 0; i < GraphTraceLen; i++) - { - if (GraphBuffer[i] > high) - high = GraphBuffer[i]; - else if (GraphBuffer[i] < low) - low = GraphBuffer[i]; - } - - /* get clock */ - clock = GetClock(Cmd, high, 0); - - /* parity for our 4 columns */ - parity[0] = parity[1] = parity[2] = parity[3] = 0; - header = rows = 0; - - /* manchester demodulate */ - bit = bit2idx = 0; - for (i = 0; i < (int)(GraphTraceLen / clock); i++) - { - hithigh = 0; - hitlow = 0; - first = 1; - - /* Find out if we hit both high and low peaks */ - for (j = 0; j < clock; j++) - { - if (GraphBuffer[(i * clock) + j] == high) - hithigh = 1; - else if (GraphBuffer[(i * clock) + j] == low) - hitlow = 1; - - /* it doesn't count if it's the first part of our read - because it's really just trailing from the last sequence */ - if (first && (hithigh || hitlow)) - hithigh = hitlow = 0; - else - first = 0; - - if (hithigh && hitlow) - break; - } - - /* If we didn't hit both high and low peaks, we had a bit transition */ - if (!hithigh || !hitlow) - bit ^= 1; - - BitStream[bit2idx++] = bit; - } - -retest: - /* We go till 5 before the graph ends because we'll get that far below */ - for (i = 1; i < bit2idx - 5; i++) - { - /* Step 2: We have our header but need our tag ID */ - if (header == 9 && rows < 10) - { - /* Confirm parity is correct */ - if ((BitStream[i] ^ BitStream[i+1] ^ BitStream[i+2] ^ BitStream[i+3]) == BitStream[i+4]) - { - /* Read another byte! */ - sprintf(id+rows, "%x", (8 * BitStream[i]) + (4 * BitStream[i+1]) + (2 * BitStream[i+2]) + (1 * BitStream[i+3])); - rows++; - - /* Keep parity info */ - parity[0] ^= BitStream[i]; - parity[1] ^= BitStream[i+1]; - parity[2] ^= BitStream[i+2]; - parity[3] ^= BitStream[i+3]; - - /* Move 4 bits ahead */ - i += 4; - } - - /* Damn, something wrong! reset */ - else - { - PrintAndLog("Thought we had a valid tag but failed at word %d (i=%d)", rows + 1, i); - - /* Start back rows * 5 + 9 header bits, -1 to not start at same place */ - i -= 9 + (5 * rows) - 5; - - rows = header = 0; - } - } - - /* Step 3: Got our 40 bits! confirm column parity */ - else if (rows == 10) - { - /* We need to make sure our 4 bits of parity are correct and we have a stop bit */ - if (BitStream[i] == parity[0] && BitStream[i+1] == parity[1] && - BitStream[i+2] == parity[2] && BitStream[i+3] == parity[3] && - BitStream[i+4] == 0) - { - /* Sweet! */ - PrintAndLog("EM410x Tag ID: %s", id); - - /* Stop any loops */ - return 1; - } - - /* Crap! Incorrect parity or no stop bit, start all over */ - else - { - rows = header = 0; - - /* Go back 59 bits (9 header bits + 10 rows at 4+1 parity) */ - i -= 59; - } - } - - /* Step 1: get our header */ - else if (header < 9) - { - /* Need 9 consecutive 1's */ - if (BitStream[i] == 1) - header++; - - /* We don't have a header, not enough consecutive 1 bits */ - else - header = 0; - } - } - - /* if we've already retested after flipping bits, return */ - if (retested++) + uint32_t hi=0; + uint64_t lo=0; + + if(!AskEm410xDemod("", &hi, &lo)) return 0; + PrintAndLog("EM410x pattern found: "); + printEM410x(hi, lo); + if (hi){ + PrintAndLog ("EM410x XL pattern found"); return 0; - - /* if this didn't work, try flipping bits */ - for (i = 0; i < bit2idx; i++) - BitStream[i] ^= 1; - - goto retest; + } + char id[12] = {0x00}; + sprintf(id, "%010llx",lo); + + global_em410xId = id; + return 1; } -/* emulate an EM410X tag - * Format: - * 1111 1111 1 <-- standard non-repeatable header - * XXXX [row parity bit] <-- 10 rows of 5 bits for our 40 bit tag ID - * .... - * CCCC <-- each bit here is parity for the 10 bits above in corresponding column - * 0 <-- stop bit, end of tag - */ +// emulate an EM410X tag int CmdEM410xSim(const char *Cmd) { - int i, n, j, h, binary[4], parity[4]; + int i, n, j, binary[4], parity[4]; + + char cmdp = param_getchar(Cmd, 0); + uint8_t uid[5] = {0x00}; + + if (cmdp == 'h' || cmdp == 'H') { + PrintAndLog("Usage: lf em4x em410xsim "); + PrintAndLog(""); + PrintAndLog(" sample: lf em4x em410xsim 0F0368568B"); + return 0; + } + + if (param_gethex(Cmd, 0, uid, 10)) { + PrintAndLog("UID must include 10 HEX symbols"); + return 0; + } + + PrintAndLog("Starting simulating UID %02X%02X%02X%02X%02X", uid[0],uid[1],uid[2],uid[3],uid[4]); + PrintAndLog("Press pm3-button to about simulation"); /* clock is 64 in EM410x tags */ int clock = 64; @@ -191,9 +89,6 @@ int CmdEM410xSim(const char *Cmd) /* clear our graph */ ClearGraph(0); - /* write it out a few times */ - for (h = 0; h < 4; h++) - { /* write 9 start bits */ for (i = 0; i < 9; i++) AppendGraph(0, clock, 1); @@ -230,29 +125,43 @@ int CmdEM410xSim(const char *Cmd) AppendGraph(0, clock, parity[3]); /* stop bit */ - AppendGraph(0, clock, 0); - } - - /* modulate that biatch */ - CmdManchesterMod(""); - - /* booyah! */ - RepaintGraphWindow(); - - CmdLFSim(""); + AppendGraph(1, clock, 0); + + CmdLFSim("0"); //240 start_gap. return 0; } -/* Function is equivalent of loread + losamples + em410xread - * looped until an EM410x tag is detected */ +/* Function is equivalent of lf read + data samples + em410xread + * looped until an EM410x tag is detected + * + * Why is CmdSamples("16000")? + * TBD: Auto-grow sample size based on detected sample rate. IE: If the + * rate gets lower, then grow the number of samples + * Changed by martin, 4000 x 4 = 16000, + * see http://www.proxmark.org/forum/viewtopic.php?pid=7235#p7235 + +*/ int CmdEM410xWatch(const char *Cmd) { - do - { - CmdLFRead(""); - CmdSamples("2000"); - } while ( ! CmdEM410xRead("")); - return 0; + do { + if (ukbhit()) { + printf("\naborted via keyboard!\n"); + break; + } + + CmdLFRead("s"); + getSamples("8192",true); //capture enough to get 2 full messages + } while (!CmdEM410xRead("")); + + return 0; +} + +int CmdEM410xWatchnSpoof(const char *Cmd) +{ + CmdEM410xWatch(Cmd); + PrintAndLog("# Replaying captured ID: %s",global_em410xId); + CmdLFaskSim(""); + return 0; } /* Read the transmitted data of an EM4x50 tag @@ -306,7 +215,7 @@ int CmdEM4x50Read(const char *Cmd) ++i; while ((GraphBuffer[i] > low) && (i(MAX_GRAPH_TRACE_LEN/64)) { + if (j>=(MAX_GRAPH_TRACE_LEN/64)) { break; } tmpbuff[j++]= i - start; @@ -401,36 +310,182 @@ int CmdEM4x50Read(const char *Cmd) int CmdEM410xWrite(const char *Cmd) { - uint64_t id = 0; - unsigned int card; + uint64_t id = 0xFFFFFFFFFFFFFFFF; // invalid id value + int card = 0xFF; // invalid card value + unsigned int clock = 0; // invalid clock value + + sscanf(Cmd, "%" PRIx64 " %d %d", &id, &card, &clock); + + // Check ID + if (id == 0xFFFFFFFFFFFFFFFF) { + PrintAndLog("Error! ID is required.\n"); + return 0; + } + if (id >= 0x10000000000) { + PrintAndLog("Error! Given EM410x ID is longer than 40 bits.\n"); + return 0; + } + + // Check Card + if (card == 0xFF) { + PrintAndLog("Error! Card type required.\n"); + return 0; + } + if (card < 0) { + PrintAndLog("Error! Bad card type selected.\n"); + return 0; + } + + // Check Clock + if (card == 1) + { + // Default: 64 + if (clock == 0) + clock = 64; + + // Allowed clock rates: 16, 32 and 64 + if ((clock != 16) && (clock != 32) && (clock != 64)) { + PrintAndLog("Error! Clock rate %d not valid. Supported clock rates are 16, 32 and 64.\n", clock); + return 0; + } + } + else if (clock != 0) + { + PrintAndLog("Error! Clock rate is only supported on T55x7 tags.\n"); + return 0; + } + + if (card == 1) { + PrintAndLog("Writing %s tag with UID 0x%010" PRIx64 " (clock rate: %d)", "T55x7", id, clock); + // NOTE: We really should pass the clock in as a separate argument, but to + // provide for backwards-compatibility for older firmware, and to avoid + // having to add another argument to CMD_EM410X_WRITE_TAG, we just store + // the clock rate in bits 8-15 of the card value + card = (card & 0xFF) | (((uint64_t)clock << 8) & 0xFF00); + } + else if (card == 0) + PrintAndLog("Writing %s tag with UID 0x%010" PRIx64, "T5555", id, clock); + else { + PrintAndLog("Error! Bad card type selected.\n"); + return 0; + } - sscanf(Cmd, "%" PRIx64 " %d", &id, &card); + UsbCommand c = {CMD_EM410X_WRITE_TAG, {card, (uint32_t)(id >> 32), (uint32_t)id}}; + SendCommand(&c); - if (id >= 0x10000000000) { - PrintAndLog("Error! Given EM410x ID is longer than 40 bits.\n"); - return 0; + return 0; +} + +int CmdReadWord(const char *Cmd) +{ + int Word = -1; //default to invalid word + UsbCommand c; + + sscanf(Cmd, "%d", &Word); + + if ( (Word > 15) | (Word < 0) ) { + PrintAndLog("Word must be between 0 and 15"); + return 1; } + + PrintAndLog("Reading word %d", Word); + + c.cmd = CMD_EM4X_READ_WORD; + c.d.asBytes[0] = 0x0; //Normal mode + c.arg[0] = 0; + c.arg[1] = Word; + c.arg[2] = 0; + SendCommand(&c); + return 0; +} - if (card > 1) { - PrintAndLog("Error! Bad card type selected.\n"); - return 0; +int CmdReadWordPWD(const char *Cmd) +{ + int Word = -1; //default to invalid word + int Password = 0xFFFFFFFF; //default to blank password + UsbCommand c; + + sscanf(Cmd, "%d %x", &Word, &Password); + + if ( (Word > 15) | (Word < 0) ) { + PrintAndLog("Word must be between 0 and 15"); + return 1; } + + PrintAndLog("Reading word %d with password %08X", Word, Password); + + c.cmd = CMD_EM4X_READ_WORD; + c.d.asBytes[0] = 0x1; //Password mode + c.arg[0] = 0; + c.arg[1] = Word; + c.arg[2] = Password; + SendCommand(&c); + return 0; +} - PrintAndLog("Writing %s tag with UID 0x%010" PRIx64, card ? "T55x7":"T5555", id); - UsbCommand c = {CMD_EM410X_WRITE_TAG, {card, (uint32_t)(id >> 32), (uint32_t)id}}; +int CmdWriteWord(const char *Cmd) +{ + int Word = 16; //default to invalid block + int Data = 0xFFFFFFFF; //default to blank data + UsbCommand c; + + sscanf(Cmd, "%x %d", &Data, &Word); + + if (Word > 15) { + PrintAndLog("Word must be between 0 and 15"); + return 1; + } + + PrintAndLog("Writing word %d with data %08X", Word, Data); + + c.cmd = CMD_EM4X_WRITE_WORD; + c.d.asBytes[0] = 0x0; //Normal mode + c.arg[0] = Data; + c.arg[1] = Word; + c.arg[2] = 0; SendCommand(&c); + return 0; +} +int CmdWriteWordPWD(const char *Cmd) +{ + int Word = 16; //default to invalid word + int Data = 0xFFFFFFFF; //default to blank data + int Password = 0xFFFFFFFF; //default to blank password + UsbCommand c; + + sscanf(Cmd, "%x %d %x", &Data, &Word, &Password); + + if (Word > 15) { + PrintAndLog("Word must be between 0 and 15"); + return 1; + } + + PrintAndLog("Writing word %d with data %08X and password %08X", Word, Data, Password); + + c.cmd = CMD_EM4X_WRITE_WORD; + c.d.asBytes[0] = 0x1; //Password mode + c.arg[0] = Data; + c.arg[1] = Word; + c.arg[2] = Password; + SendCommand(&c); return 0; } static command_t CommandTable[] = { - {"help", CmdHelp, 1, "This help"}, - {"em410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag"}, - {"em410xsim", CmdEM410xSim, 0, " -- Simulate EM410x tag"}, - {"em410xwatch", CmdEM410xWatch, 0, "Watches for EM410x tags"}, - {"em410xwrite", CmdEM410xWrite, 1, " <'0' T5555> <'1' T55x7> -- Write EM410x UID to T5555(Q5) or T55x7 tag"}, - {"em4x50read", CmdEM4x50Read, 1, "Extract data from EM4x50 tag"}, + {"help", CmdHelp, 1, "This help"}, + {"em410xdemod", CmdEMdemodASK, 0, "[findone] -- Extract ID from EM410x tag (option 0 for continuous loop, 1 for only 1 tag)"}, + {"em410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag"}, + {"em410xsim", CmdEM410xSim, 0, " -- Simulate EM410x tag"}, + {"em410xwatch", CmdEM410xWatch, 0, "['h'] -- Watches for EM410x 125/134 kHz tags (option 'h' for 134)"}, + {"em410xspoof", CmdEM410xWatchnSpoof, 0, "['h'] --- Watches for EM410x 125/134 kHz tags, and replays them. (option 'h' for 134)" }, + {"em410xwrite", CmdEM410xWrite, 1, " <'0' T5555> <'1' T55x7> [clock rate] -- Write EM410x UID to T5555(Q5) or T55x7 tag, optionally setting clock rate"}, + {"em4x50read", CmdEM4x50Read, 1, "Extract data from EM4x50 tag"}, + {"readword", CmdReadWord, 1, " -- Read EM4xxx word data"}, + {"readwordPWD", CmdReadWordPWD, 1, " -- Read EM4xxx word data in password mode"}, + {"writeword", CmdWriteWord, 1, " -- Write EM4xxx word data"}, + {"writewordPWD", CmdWriteWordPWD, 1, " -- Write EM4xxx word data in password mode"}, {NULL, NULL, 0, NULL} };