X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/3649b640e6a7f70e460791db18ed7cb96d9cfff6..49dc1d0a9eafdb1e369ead88c3c8882bc6959a17:/client/cmdlfem4x.c diff --git a/client/cmdlfem4x.c b/client/cmdlfem4x.c index 67013b2e..22b12aa4 100644 --- a/client/cmdlfem4x.c +++ b/client/cmdlfem4x.c @@ -1,4 +1,4 @@ - //----------------------------------------------------------------------------- +//----------------------------------------------------------------------------- // Copyright (C) 2010 iZsh // // This code is licensed to you under the terms of the GNU GPL, version 2 or, @@ -13,21 +13,26 @@ #include #include "proxmark3.h" #include "ui.h" +#include "util.h" #include "graph.h" -#include "cmdmain.h" #include "cmdparser.h" #include "cmddata.h" #include "cmdlf.h" #include "cmdlfem4x.h" -#include "util.h" -#include "data.h" -#define LF_TRACE_BUFF_SIZE 12000 -#define LF_BITSSTREAM_LEN 1000 - 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 @@ -38,173 +43,35 @@ 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]; - char id2[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 = 0; 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])); - sprintf(id2+rows, "%x", (8 * BitStream[i+3]) + (4 * BitStream[i+2]) + (2 * BitStream[i+1]) + (1 * BitStream[i])); - 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) -2; - - 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); - PrintAndLog("Unique Tag ID: %s", id2); - - global_em410xId = 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 sim "); + PrintAndLog("Usage: lf em4x em410xsim "); PrintAndLog(""); - PrintAndLog(" sample: lf em4x sim 0F0368568B"); + PrintAndLog(" sample: lf em4x em410xsim 0F0368568B"); return 0; } @@ -215,16 +82,13 @@ int CmdEM410xSim(const char *Cmd) 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; /* clear our graph */ - ClearGraph(1); - - /* write it out a few times */ - for (h = 0; h < 4; h++) - { + ClearGraph(0); + /* write 9 start bits */ for (i = 0; i < 9; i++) AppendGraph(0, clock, 1); @@ -261,16 +125,9 @@ int CmdEM410xSim(const char *Cmd) AppendGraph(0, clock, parity[3]); /* stop bit */ - AppendGraph(0, clock, 0); - } - - /* modulate that biatch */ - CmdManchesterMod("64"); - - /* booyah! */ - RepaintGraphWindow(); - - CmdLFSim(""); + AppendGraph(1, clock, 0); + + CmdLFSim("0"); //240 start_gap. return 0; } @@ -286,29 +143,25 @@ int CmdEM410xSim(const char *Cmd) */ int CmdEM410xWatch(const char *Cmd) { - int read_h = (*Cmd == 'h'); - do - { + do { if (ukbhit()) { printf("\naborted via keyboard!\n"); break; } - CmdLFRead(read_h ? "h" : ""); - CmdSamples("16000"); - - } while ( - !CmdEM410xRead("") - ); + 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 : %s",global_em410xId); - CmdEM410xSim(global_em410xId); - return 0; + PrintAndLog("# Replaying captured ID: %s",global_em410xId); + CmdLFaskSim(""); + return 0; } /* Read the transmitted data of an EM4x50 tag @@ -526,79 +379,47 @@ int CmdEM410xWrite(const char *Cmd) int CmdReadWord(const char *Cmd) { int Word = -1; //default to invalid word - UsbCommand c; + UsbCommand c; - sscanf(Cmd, "%d", &Word); + sscanf(Cmd, "%d", &Word); if ( (Word > 15) | (Word < 0) ) { - PrintAndLog("Word must be between 0 and 15"); - return 1; - } + PrintAndLog("Word must be between 0 and 15"); + return 1; + } - PrintAndLog("Reading word %d", Word); + 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); - WaitForResponse(CMD_ACK, NULL); - - uint8_t data[LF_TRACE_BUFF_SIZE] = {0x00}; - - GetFromBigBuf(data,LF_TRACE_BUFF_SIZE,3560); //3560 -- should be offset.. - WaitForResponseTimeout(CMD_ACK,NULL, 1500); - - for (int j = 0; j < LF_TRACE_BUFF_SIZE; j++) { - GraphBuffer[j] = ((int)data[j]); - } - GraphTraceLen = LF_TRACE_BUFF_SIZE; - - uint8_t bits[LF_BITSSTREAM_LEN] = {0x00}; - uint8_t * bitstream = bits; - manchester_decode(GraphBuffer, LF_TRACE_BUFF_SIZE, bitstream,LF_BITSSTREAM_LEN); - RepaintGraphWindow(); + 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; } 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); - + 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("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); - WaitForResponse(CMD_ACK, NULL); - - uint8_t data[LF_TRACE_BUFF_SIZE] = {0x00}; - - GetFromBigBuf(data,LF_TRACE_BUFF_SIZE,3560); //3560 -- should be offset.. - WaitForResponseTimeout(CMD_ACK,NULL, 1500); - - for (int j = 0; j < LF_TRACE_BUFF_SIZE; j++) { - GraphBuffer[j] = ((int)data[j]); - } - GraphTraceLen = LF_TRACE_BUFF_SIZE; - - uint8_t bits[LF_BITSSTREAM_LEN] = {0x00}; - uint8_t * bitstream = bits; - manchester_decode(GraphBuffer, LF_TRACE_BUFF_SIZE, bitstream, LF_BITSSTREAM_LEN); - RepaintGraphWindow(); + 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; } @@ -654,16 +475,17 @@ int CmdWriteWordPWD(const char *Cmd) static command_t CommandTable[] = { {"help", CmdHelp, 1, "This help"}, - {"410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag"}, - {"410xsim", CmdEM410xSim, 0, " -- Simulate EM410x tag"}, - {"410xwatch", CmdEM410xWatch, 0, "['h'] -- Watches for EM410x 125/134 kHz tags (option 'h' for 134)"}, - {"410xspoof", CmdEM410xWatchnSpoof, 0, "['h'] --- Watches for EM410x 125/134 kHz tags, and replays them. (option 'h' for 134)" }, - {"410xwrite", CmdEM410xWrite, 1, " <'0' T5555> <'1' T55x7> [clock rate] -- Write EM410x UID to T5555(Q5) or T55x7 tag, optionally setting clock rate"}, - {"4x50read", CmdEM4x50Read, 1, "Extract data from EM4x50 tag"}, - {"rd", CmdReadWord, 1, " -- Read EM4xxx word data"}, - {"rdpwd", CmdReadWordPWD, 1, " -- Read EM4xxx word data in password mode "}, - {"wr", CmdWriteWord, 1, " -- Write EM4xxx word data"}, - {"wrpwd", CmdWriteWordPWD, 1, " -- Write EM4xxx word data in password mode"}, + {"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} };