X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/10403a6a3005f81839603dcb415ee352f939c06b..905c55de2bbe642412b47ed4e92344096c817fac:/client/cmdlfem4x.c diff --git a/client/cmdlfem4x.c b/client/cmdlfem4x.c index 978c41c3..59a1eef3 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, @@ -8,32 +8,31 @@ // Low frequency EM4x commands //----------------------------------------------------------------------------- -#include -#include -#include -#include "proxmark3.h" -#include "ui.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; +uint64_t g_em410xid = 0; static int CmdHelp(const char *Cmd); +int usage_lf_em410x_sim(void) { + PrintAndLog("Simulating EM410x tag"); + PrintAndLog(""); + PrintAndLog("Usage: lf em 410xsim [h] "); + PrintAndLog("Options:"); + PrintAndLog(" h - this help"); + PrintAndLog(" uid - uid (10 HEX symbols)"); + PrintAndLog(" clock - clock (32|64) (optional)"); + PrintAndLog("samples:"); + PrintAndLog(" lf em 410xsim 0F0368568B"); + PrintAndLog(" lf em 410xsim 0F0368568B 32"); + return 0; +} + 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; + uint8_t findone = (cmdp == '1') ? 1 : 0; + UsbCommand c = {CMD_EM410X_DEMOD, {findone, 0, 0}}; SendCommand(&c); return 0; } @@ -48,227 +47,81 @@ int CmdEMdemodASK(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] = {0x00}; - char id2[11] = {0x00}; - int retested = 0; - uint8_t BitStream[MAX_GRAPH_TRACE_LEN]; - high = low = 0; - - // get clock - clock = GetClock(Cmd, 0); - - // Detect high and lows and clock - DetectHighLowInGraph( &high, &low, TRUE); - - PrintAndLog("NUMNUM"); - - // 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) -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); - 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++){ - PrintAndLog("Failed to decode"); - return 0; - } + uint32_t hi = 0; + uint64_t lo = 0; - /* if this didn't work, try flipping bits */ - for (i = 0; i < bit2idx; i++) - BitStream[i] ^= 1; + if(!AskEm410xDemod("", &hi, &lo, false)) return 0; - goto retest; + printEM410x(hi, lo); + g_em410xid = lo; + 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, binary[4], parity[4]; + uint8_t uid[5] = {0x00}; char cmdp = param_getchar(Cmd, 0); - uint8_t uid[5] = {0x00}; + if (cmdp == 'h' || cmdp == 'H') return usage_lf_em410x_sim(); - if (cmdp == 'h' || cmdp == 'H') { - PrintAndLog("Usage: lf em4x 410xsim "); - PrintAndLog(""); - PrintAndLog(" sample: lf em4x 410xsim 0F0368568B"); - return 0; - } + /* clock is 64 in EM410x tags */ + uint8_t clock = 64; 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]); + param_getdec(Cmd, 1, &clock); + + PrintAndLog("Starting simulating UID %02X%02X%02X%02X%02X clock: %d", uid[0],uid[1],uid[2],uid[3],uid[4],clock); PrintAndLog("Press pm3-button to about simulation"); - - /* clock is 64 in EM410x tags */ - int clock = 64; - - /* clear our graph */ - ClearGraph(0); - - /* write 9 start bits */ - for (i = 0; i < 9; i++) - AppendGraph(0, clock, 1); - - /* for each hex char */ - parity[0] = parity[1] = parity[2] = parity[3] = 0; - for (i = 0; i < 10; i++) - { - /* read each hex char */ - sscanf(&Cmd[i], "%1x", &n); - for (j = 3; j >= 0; j--, n/= 2) - binary[j] = n % 2; - - /* append each bit */ - AppendGraph(0, clock, binary[0]); - AppendGraph(0, clock, binary[1]); - AppendGraph(0, clock, binary[2]); - AppendGraph(0, clock, binary[3]); - - /* append parity bit */ - AppendGraph(0, clock, binary[0] ^ binary[1] ^ binary[2] ^ binary[3]); - - /* keep track of column parity */ - parity[0] ^= binary[0]; - parity[1] ^= binary[1]; - parity[2] ^= binary[2]; - parity[3] ^= binary[3]; - } - - /* parity columns */ - AppendGraph(0, clock, parity[0]); - AppendGraph(0, clock, parity[1]); - AppendGraph(0, clock, parity[2]); - AppendGraph(0, clock, parity[3]); - - /* stop bit */ - AppendGraph(1, clock, 0); + + /* clear our graph */ + ClearGraph(0); + + /* write 9 start bits */ + for (i = 0; i < 9; i++) + AppendGraph(0, clock, 1); + + /* for each hex char */ + parity[0] = parity[1] = parity[2] = parity[3] = 0; + for (i = 0; i < 10; i++) + { + /* read each hex char */ + sscanf(&Cmd[i], "%1x", &n); + for (j = 3; j >= 0; j--, n/= 2) + binary[j] = n % 2; + + /* append each bit */ + AppendGraph(0, clock, binary[0]); + AppendGraph(0, clock, binary[1]); + AppendGraph(0, clock, binary[2]); + AppendGraph(0, clock, binary[3]); + + /* append parity bit */ + AppendGraph(0, clock, binary[0] ^ binary[1] ^ binary[2] ^ binary[3]); + + /* keep track of column parity */ + parity[0] ^= binary[0]; + parity[1] ^= binary[1]; + parity[2] ^= binary[2]; + parity[3] ^= binary[3]; + } + + /* parity columns */ + AppendGraph(0, clock, parity[0]); + AppendGraph(0, clock, parity[1]); + AppendGraph(0, clock, parity[2]); + AppendGraph(0, clock, parity[3]); + + /* stop bit */ + AppendGraph(1, clock, 0); - CmdLFSim("240"); //240 start_gap. - return 0; + CmdLFSim("0"); //240 start_gap. + return 0; } /* Function is equivalent of lf read + data samples + em410xread @@ -279,183 +132,35 @@ int CmdEM410xSim(const char *Cmd) * 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) -{ - char cmdp = param_getchar(Cmd, 0); - int read_h = (cmdp == 'h'); +int CmdEM410xWatch(const char *Cmd) { do { if (ukbhit()) { printf("\naborted via keyboard!\n"); break; - } - - CmdLFRead(read_h ? "h" : ""); - CmdSamples("6000"); - } while ( - !CmdEM410xRead("") - ); + } + CmdLFRead("s"); + getSamples("6144",true); + } while (!CmdEM410xRead("")); return 0; } +//currently only supports manchester modulations +// todo: helptext int CmdEM410xWatchnSpoof(const char *Cmd) { + // loops if the captured ID was in XL-format. CmdEM410xWatch(Cmd); - PrintAndLog("# Replaying : %s",global_em410xId); - CmdEM410xSim(global_em410xId); - return 0; -} - -/* Read the transmitted data of an EM4x50 tag - * Format: - * - * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity - * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity - * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity - * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity - * CCCCCCCC <- column parity bits - * 0 <- stop bit - * LW <- Listen Window - * - * This pattern repeats for every block of data being transmitted. - * Transmission starts with two Listen Windows (LW - a modulated - * pattern of 320 cycles each (32/32/128/64/64)). - * - * Note that this data may or may not be the UID. It is whatever data - * is stored in the blocks defined in the control word First and Last - * Word Read values. UID is stored in block 32. - */ -int CmdEM4x50Read(const char *Cmd) -{ - int i, j, startblock, skip, block, start, end, low, high; - bool complete= false; - int tmpbuff[MAX_GRAPH_TRACE_LEN / 64]; - char tmp[6]; - - high= low= 0; - memset(tmpbuff, 0, MAX_GRAPH_TRACE_LEN / 64); - - /* first get high and low values */ - for (i = 0; i < GraphTraceLen; i++) - { - if (GraphBuffer[i] > high) - high = GraphBuffer[i]; - else if (GraphBuffer[i] < low) - low = GraphBuffer[i]; - } - - /* populate a buffer with pulse lengths */ - i= 0; - j= 0; - while (i < GraphTraceLen) - { - // measure from low to low - while ((GraphBuffer[i] > low) && (i low) && (i=(MAX_GRAPH_TRACE_LEN/64)) { - break; - } - tmpbuff[j++]= i - start; - } - - /* look for data start - should be 2 pairs of LW (pulses of 192,128) */ - start= -1; - skip= 0; - for (i= 0; i < j - 4 ; ++i) - { - skip += tmpbuff[i]; - if (tmpbuff[i] >= 190 && tmpbuff[i] <= 194) - if (tmpbuff[i+1] >= 126 && tmpbuff[i+1] <= 130) - if (tmpbuff[i+2] >= 190 && tmpbuff[i+2] <= 194) - if (tmpbuff[i+3] >= 126 && tmpbuff[i+3] <= 130) - { - start= i + 3; - break; - } - } - startblock= i + 3; - - /* skip over the remainder of the LW */ - skip += tmpbuff[i+1]+tmpbuff[i+2]; - while (skip < MAX_GRAPH_TRACE_LEN && GraphBuffer[skip] > low) - ++skip; - skip += 8; - - /* now do it again to find the end */ - end= start; - for (i += 3; i < j - 4 ; ++i) - { - end += tmpbuff[i]; - if (tmpbuff[i] >= 190 && tmpbuff[i] <= 194) - if (tmpbuff[i+1] >= 126 && tmpbuff[i+1] <= 130) - if (tmpbuff[i+2] >= 190 && tmpbuff[i+2] <= 194) - if (tmpbuff[i+3] >= 126 && tmpbuff[i+3] <= 130) - { - complete= true; - break; - } - } - - if (start >= 0) - PrintAndLog("Found data at sample: %i",skip); - else - { - PrintAndLog("No data found!"); - PrintAndLog("Try again with more samples."); - return 0; - } - - if (!complete) - { - PrintAndLog("*** Warning!"); - PrintAndLog("Partial data - no end found!"); - PrintAndLog("Try again with more samples."); - } - - /* get rid of leading crap */ - sprintf(tmp,"%i",skip); - CmdLtrim(tmp); - - /* now work through remaining buffer printing out data blocks */ - block= 0; - i= startblock; - while (block < 6) - { - PrintAndLog("Block %i:", block); - // mandemod routine needs to be split so we can call it for data - // just print for now for debugging - CmdManchesterDemod("i 64"); - skip= 0; - /* look for LW before start of next block */ - for ( ; i < j - 4 ; ++i) - { - skip += tmpbuff[i]; - if (tmpbuff[i] >= 190 && tmpbuff[i] <= 194) - if (tmpbuff[i+1] >= 126 && tmpbuff[i+1] <= 130) - break; - } - while (GraphBuffer[skip] > low) - ++skip; - skip += 8; - sprintf(tmp,"%i",skip); - CmdLtrim(tmp); - start += skip; - block++; - } - return 0; + PrintAndLog("# Replaying captured ID: %" PRIu64 , g_em410xid); + CmdLFaskSim(""); + return 0; } int CmdEM410xWrite(const char *Cmd) { - uint64_t id = 0xFFFFFFFFFFFFFFFF; // invalid id value - int card = 0xFF; // invalid card value - unsigned int clock = 0; // invalid clock value + uint64_t id = 0xFFFFFFFFFFFFFFFF; // invalid id value + int card = 0xFF; // invalid card value + uint32_t clock = 0; // invalid clock value sscanf(Cmd, "%" PRIx64 " %d %d", &id, &card, &clock); @@ -480,21 +185,13 @@ int CmdEM410xWrite(const char *Cmd) } // Check Clock - if (card == 1) - { // Default: 64 - if (clock == 0) - clock = 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"); + // Allowed clock rates: 16, 32, 40 and 64 + if ((clock != 16) && (clock != 32) && (clock != 64) && (clock != 40)) { + PrintAndLog("Error! Clock rate %d not valid. Supported clock rates are 16, 32, 40 and 64.\n", clock); return 0; } @@ -504,434 +201,893 @@ int CmdEM410xWrite(const char *Cmd) // 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) + card = (card & 0xFF) | ((clock << 8) & 0xFF00); + } else if (card == 0) { PrintAndLog("Writing %s tag with UID 0x%010" PRIx64, "T5555", id, clock); - else { + card = (card & 0xFF) | ((clock << 8) & 0xFF00); + } else { PrintAndLog("Error! Bad card type selected.\n"); return 0; } - UsbCommand c = {CMD_EM410X_WRITE_TAG, {card, (uint32_t)(id >> 32), (uint32_t)id}}; - SendCommand(&c); + UsbCommand c = {CMD_EM410X_WRITE_TAG, {card, (uint32_t)(id >> 32), (uint32_t)id}}; + SendCommand(&c); + return 0; +} - return 0; +bool EM_EndParityTest(uint8_t *BitStream, size_t size, uint8_t rows, uint8_t cols, uint8_t pType) +{ + if (rows*cols>size) return FALSE; + uint8_t colP=0; + //assume last col is a parity and do not test + for (uint8_t colNum = 0; colNum < cols-1; colNum++) { + for (uint8_t rowNum = 0; rowNum < rows; rowNum++) { + colP ^= BitStream[(rowNum*cols)+colNum]; + } + if (colP != pType) return FALSE; + } + return TRUE; } -int CmdReadWord(const char *Cmd) +bool EM_ByteParityTest(uint8_t *BitStream, size_t size, uint8_t rows, uint8_t cols, uint8_t pType) { - 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; + if (rows*cols>size) return FALSE; + uint8_t rowP=0; + //assume last row is a parity row and do not test + for (uint8_t rowNum = 0; rowNum < rows-1; rowNum++) { + for (uint8_t colNum = 0; colNum < cols; colNum++) { + rowP ^= BitStream[(rowNum*cols)+colNum]; + } + if (rowP != pType) return FALSE; } - - 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); + return TRUE; +} - uint8_t data[LF_TRACE_BUFF_SIZE] = {0x00}; +// EM word parity test. +// 9*5 = 45 bits in total +// 012345678|r1 +// 012345678|r2 +// 012345678|r3 +// 012345678|r4 +// ------------ +//c012345678| 0 +// |- must be zero - GetFromBigBuf(data,LF_TRACE_BUFF_SIZE,0); //3560 -- should be offset.. - WaitForResponseTimeout(CMD_ACK,NULL, 1500); +bool EMwordparitytest(uint8_t *bits){ - for (int j = 0; j < LF_TRACE_BUFF_SIZE; j++) { - GraphBuffer[j] = ((int)data[j]); - } - GraphTraceLen = LF_TRACE_BUFF_SIZE; + // last row/col parity must be 0 + if (bits[44] != 0 ) return FALSE; - uint8_t bits[LF_BITSSTREAM_LEN] = {0x00}; - uint8_t * bitstream = bits; - manchester_decode(GraphBuffer, LF_TRACE_BUFF_SIZE, bitstream,LF_BITSSTREAM_LEN); - RepaintGraphWindow(); - return 0; + // col parity check + uint8_t c1 = bytebits_to_byte(bits, 8) ^ bytebits_to_byte(bits+9, 8) ^ bytebits_to_byte(bits+18, 8) ^ bytebits_to_byte(bits+27, 8); + uint8_t c2 = bytebits_to_byte(bits+36, 8); + if ( c1 != c2 ) return FALSE; + + // row parity check + uint8_t rowP = 0; + for ( uint8_t i = 0; i < 36; ++i ) { + + rowP ^= bits[i]; + if ( i>0 && (i % 9) == 0) { + + if ( rowP != EVEN ) + return FALSE; + + rowP = 0; + } + } + // all checks ok. + return TRUE; +} + + +//////////////// 4050 / 4450 commands +int usage_lf_em4x50_dump(void) { + PrintAndLog("Dump EM4x50/EM4x69. Tag must be on antenna. "); + PrintAndLog(""); + PrintAndLog("Usage: lf em 4x50dump [h] "); + PrintAndLog("Options:"); + PrintAndLog(" h - this help"); + PrintAndLog(" pwd - password (hex) (optional)"); + PrintAndLog("samples:"); + PrintAndLog(" lf em 4x50dump"); + PrintAndLog(" lf em 4x50dump 11223344"); + return 0; +} +int usage_lf_em4x50_read(void) { + PrintAndLog("Read EM 4x50/EM4x69. Tag must be on antenna. "); + PrintAndLog(""); + PrintAndLog("Usage: lf em 4x50read [h]
"); + PrintAndLog("Options:"); + PrintAndLog(" h - this help"); + PrintAndLog(" address - memory address to read. (0-15)"); + PrintAndLog(" pwd - password (hex) (optional)"); + PrintAndLog("samples:"); + PrintAndLog(" lf em 4x50read 1"); + PrintAndLog(" lf em 4x50read 1 11223344"); + return 0; +} +int usage_lf_em4x50_write(void) { + PrintAndLog("Write EM 4x50/4x69. Tag must be on antenna. "); + PrintAndLog(""); + PrintAndLog("Usage: lf em 4x50write [h]
"); + PrintAndLog("Options:"); + PrintAndLog(" h - this help"); + PrintAndLog(" address - memory address to write to. (0-15)"); + PrintAndLog(" data - data to write (hex)"); + PrintAndLog(" pwd - password (hex) (optional)"); + PrintAndLog("samples:"); + PrintAndLog(" lf em 4x50write 1 deadc0de"); + PrintAndLog(" lf em 4x50write 1 deadc0de 11223344"); + return 0; } -int CmdReadWordPWD(const char *Cmd) +uint32_t OutputEM4x50_Block(uint8_t *BitStream, size_t size, bool verbose, bool pTest) { - int Word = -1; //default to invalid word - int Password = 0xFFFFFFFF; //default to blank password - UsbCommand c; + if (size<45) return 0; + + uint32_t code = bytebits_to_byte(BitStream,8); + code = code<<8 | bytebits_to_byte(BitStream+9,8); + code = code<<8 | bytebits_to_byte(BitStream+18,8); + code = code<<8 | bytebits_to_byte(BitStream+27,8); + + if (verbose || g_debugMode){ + for (uint8_t i = 0; i<5; i++){ + if (i == 4) PrintAndLog(""); //parity byte spacer + PrintAndLog("%d%d%d%d%d%d%d%d %d -> 0x%02x", + BitStream[i*9], + BitStream[i*9+1], + BitStream[i*9+2], + BitStream[i*9+3], + BitStream[i*9+4], + BitStream[i*9+5], + BitStream[i*9+6], + BitStream[i*9+7], + BitStream[i*9+8], + bytebits_to_byte(BitStream+i*9,8) + ); + } + if (pTest) + PrintAndLog("Parity Passed"); + else + PrintAndLog("Parity Failed"); + } + return code; +} - sscanf(Cmd, "%d %x", &Word, &Password); - if ( (Word > 15) | (Word < 0) ) { - PrintAndLog("Word must be between 0 and 15"); - return 1; +/* Read the transmitted data of an EM4x50 tag from the graphbuffer + * Format: + * + * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity + * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity + * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity + * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity + * CCCCCCCC <- column parity bits + * 0 <- stop bit + * LW <- Listen Window + * + * This pattern repeats for every block of data being transmitted. + * Transmission starts with two Listen Windows (LW - a modulated + * pattern of 320 cycles each (32/32/128/64/64)). + * + * Note that this data may or may not be the UID. It is whatever data + * is stored in the blocks defined in the control word First and Last + * Word Read values. UID is stored in block 32. + */ + //completed by Marshmellow +int EM4x50Read(const char *Cmd, bool verbose) { + uint8_t fndClk[] = {8,16,32,40,50,64,128}; + int clk = 0; + int invert = 0; + int tol = 0; + int i, j, startblock, skip, block, start, end, low, high, minClk; + bool complete = false; + int tmpbuff[MAX_GRAPH_TRACE_LEN / 64]; + uint32_t Code[6]; + char tmp[6]; + char tmp2[20]; + int phaseoff; + high = low = 0; + memset(tmpbuff, 0, MAX_GRAPH_TRACE_LEN / 64); + + // get user entry if any + sscanf(Cmd, "%i %i", &clk, &invert); + + // save GraphBuffer - to restore it later + save_restoreGB(1); + + // first get high and low values + for (i = 0; i < GraphTraceLen; i++) { + if (GraphBuffer[i] > high) + high = GraphBuffer[i]; + else if (GraphBuffer[i] < low) + low = GraphBuffer[i]; } - - 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); + i = 0; + j = 0; + minClk = 255; + // get to first full low to prime loop and skip incomplete first pulse + while ((GraphBuffer[i] < high) && (i < GraphTraceLen)) + ++i; + while ((GraphBuffer[i] > low) && (i < GraphTraceLen)) + ++i; + skip = i; + + // populate tmpbuff buffer with pulse lengths + while (i < GraphTraceLen) { + // measure from low to low + while ((GraphBuffer[i] > low) && (i < GraphTraceLen)) + ++i; + start= i; + while ((GraphBuffer[i] < high) && (i < GraphTraceLen)) + ++i; + while ((GraphBuffer[i] > low) && (i < GraphTraceLen)) + ++i; + if (j>=(MAX_GRAPH_TRACE_LEN/64)) { + break; + } + tmpbuff[j++]= i - start; + if (i-start < minClk && i < GraphTraceLen) { + minClk = i - start; + } + } + // set clock + if (!clk) { + for (uint8_t clkCnt = 0; clkCnt<7; clkCnt++) { + tol = fndClk[clkCnt]/8; + if (minClk >= fndClk[clkCnt]-tol && minClk <= fndClk[clkCnt]+1) { + clk=fndClk[clkCnt]; + break; + } + } + if (!clk) { + if (verbose || g_debugMode) PrintAndLog("ERROR: EM4x50 - didn't find a clock"); + return 0; + } + } else tol = clk/8; + + // look for data start - should be 2 pairs of LW (pulses of clk*3,clk*2) + start = -1; + for (i= 0; i < j - 4 ; ++i) { + skip += tmpbuff[i]; + if (tmpbuff[i] >= clk*3-tol && tmpbuff[i] <= clk*3+tol) //3 clocks + if (tmpbuff[i+1] >= clk*2-tol && tmpbuff[i+1] <= clk*2+tol) //2 clocks + if (tmpbuff[i+2] >= clk*3-tol && tmpbuff[i+2] <= clk*3+tol) //3 clocks + if (tmpbuff[i+3] >= clk-tol) //1.5 to 2 clocks - depends on bit following + { + start= i + 4; + break; + } + } + startblock = i + 4; + + // skip over the remainder of LW + skip += tmpbuff[i+1] + tmpbuff[i+2] + clk; + if (tmpbuff[i+3]>clk) + phaseoff = tmpbuff[i+3]-clk; + else + phaseoff = 0; + // now do it again to find the end + end = skip; + for (i += 3; i < j - 4 ; ++i) { + end += tmpbuff[i]; + if (tmpbuff[i] >= clk*3-tol && tmpbuff[i] <= clk*3+tol) //3 clocks + if (tmpbuff[i+1] >= clk*2-tol && tmpbuff[i+1] <= clk*2+tol) //2 clocks + if (tmpbuff[i+2] >= clk*3-tol && tmpbuff[i+2] <= clk*3+tol) //3 clocks + if (tmpbuff[i+3] >= clk-tol) //1.5 to 2 clocks - depends on bit following + { + complete= true; + break; + } + } + end = i; + // report back + if (verbose || g_debugMode) { + if (start >= 0) { + PrintAndLog("\nNote: one block = 50 bits (32 data, 12 parity, 6 marker)"); + } else { + PrintAndLog("No data found!, clock tried:%d",clk); + PrintAndLog("Try again with more samples."); + PrintAndLog(" or after a 'data askedge' command to clean up the read"); + return 0; + } + } else if (start < 0) return 0; + start = skip; + snprintf(tmp2, sizeof(tmp2),"%d %d 1000 %d", clk, invert, clk*47); + // get rid of leading crap + snprintf(tmp, sizeof(tmp), "%i", skip); + CmdLtrim(tmp); + bool pTest; + bool AllPTest = true; + // now work through remaining buffer printing out data blocks + block = 0; + i = startblock; + while (block < 6) { + if (verbose || g_debugMode) PrintAndLog("\nBlock %i:", block); + skip = phaseoff; - uint8_t data[LF_TRACE_BUFF_SIZE] = {0x00}; + // look for LW before start of next block + for ( ; i < j - 4 ; ++i) { + skip += tmpbuff[i]; + if (tmpbuff[i] >= clk*3-tol && tmpbuff[i] <= clk*3+tol) + if (tmpbuff[i+1] >= clk-tol) + break; + } + if (i >= j-4) break; //next LW not found + skip += clk; + if (tmpbuff[i+1]>clk) + phaseoff = tmpbuff[i+1]-clk; + else + phaseoff = 0; + i += 2; + if (ASKDemod(tmp2, false, false, 1) < 1) { + save_restoreGB(0); + return 0; + } + //set DemodBufferLen to just one block + DemodBufferLen = skip/clk; + //test parities + pTest = EM_ByteParityTest(DemodBuffer,DemodBufferLen,5,9,0); + pTest &= EM_EndParityTest(DemodBuffer,DemodBufferLen,5,9,0); + AllPTest &= pTest; + //get output + Code[block] = OutputEM4x50_Block(DemodBuffer,DemodBufferLen,verbose, pTest); + if (g_debugMode) PrintAndLog("\nskipping %d samples, bits:%d", skip, skip/clk); + //skip to start of next block + snprintf(tmp,sizeof(tmp),"%i",skip); + CmdLtrim(tmp); + block++; + if (i >= end) break; //in case chip doesn't output 6 blocks + } + //print full code: + if (verbose || g_debugMode || AllPTest){ + if (!complete) { + PrintAndLog("*** Warning!"); + PrintAndLog("Partial data - no end found!"); + PrintAndLog("Try again with more samples."); + } + PrintAndLog("Found data at sample: %i - using clock: %i", start, clk); + end = block; + for (block=0; block < end; block++){ + PrintAndLog("Block %d: %08x",block,Code[block]); + } + if (AllPTest) { + PrintAndLog("Parities Passed"); + } else { + PrintAndLog("Parities Failed"); + PrintAndLog("Try cleaning the read samples with 'data askedge'"); + } + } - GetFromBigBuf(data,LF_TRACE_BUFF_SIZE,0); //3560 -- should be offset.. - WaitForResponseTimeout(CMD_ACK,NULL, 1500); + //restore GraphBuffer + save_restoreGB(0); + return (int)AllPTest; +} - for (int j = 0; j < LF_TRACE_BUFF_SIZE; j++) { - GraphBuffer[j] = ((int)data[j]); - } - GraphTraceLen = LF_TRACE_BUFF_SIZE; +int CmdEM4x50Read(const char *Cmd) { + uint8_t ctmp = param_getchar(Cmd, 0); + if ( ctmp == 'H' || ctmp == 'h' ) return usage_lf_em4x50_read(); + return EM4x50Read(Cmd, true); +} +int CmdEM4x50Write(const char *Cmd){ + uint8_t ctmp = param_getchar(Cmd, 0); + if ( ctmp == 'H' || ctmp == 'h' ) return usage_lf_em4x50_write(); + PrintAndLog("no implemented yet"); + return 0; +} +int CmdEM4x50Dump(const char *Cmd){ + uint8_t ctmp = param_getchar(Cmd, 0); + if ( ctmp == 'H' || ctmp == 'h' ) return usage_lf_em4x50_dump(); + PrintAndLog("no implemented yet"); + return 0; +} + +#define EM_PREAMBLE_LEN 6 +// download samples from device and copy to Graphbuffer +bool downloadSamplesEM(){ - uint8_t bits[LF_BITSSTREAM_LEN] = {0x00}; - uint8_t * bitstream = bits; - manchester_decode(GraphBuffer, LF_TRACE_BUFF_SIZE, bitstream, LF_BITSSTREAM_LEN); - RepaintGraphWindow(); - return 0; + // 8 bit preamble + 32 bit word response (max clock (128) * 40bits = 5120 samples) + uint8_t got[6000]; + GetFromBigBuf(got, sizeof(got), 0); + if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2500) ) { + PrintAndLog("command execution time out"); + return FALSE; + } + setGraphBuf(got, sizeof(got)); + return TRUE; } -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"}, - {"410xdemod", CmdEMdemodASK, 0, "[clock rate] -- Extract ID from EM410x tag"}, - {"410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag"}, - {"410xsim", CmdEM410xSim, 0, " -- Simulate EM410x tag"}, - {"replay", MWRem4xReplay, 0, "Watches for tag and simulates manchester encoded em4x 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"}, - {NULL, NULL, 0, NULL} -}; +// em_demod +bool doPreambleSearch(size_t *startIdx){ + + // sanity check + if ( DemodBufferLen < EM_PREAMBLE_LEN) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 demodbuffer too small"); + return FALSE; + } + // set size to 20 to only test first 14 positions for the preamble + size_t size = (20 > DemodBufferLen) ? DemodBufferLen : 20; + *startIdx = 0; + // skip first two 0 bits as they might have been missed in the demod + uint8_t preamble[EM_PREAMBLE_LEN] = {0,0,1,0,1,0}; + + if ( !preambleSearchEx(DemodBuffer, preamble, EM_PREAMBLE_LEN, &size, startIdx, TRUE)) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 preamble not found :: %d", *startIdx); + return FALSE; + } + return TRUE; +} -//Confirms the parity of a bitstream as well as obtaining the data (TagID) from within the appropriate memory space. -//Arguments: -// Pointer to a string containing the desired bitsream -// Pointer to a string that will receive the decoded tag ID -// Length of the bitsream pointed at in the first argument, char* _strBitStream -//Retuns: -//1 Parity confirmed -//0 Parity not confirmed -int ConfirmEm410xTagParity( char* _strBitStream, char* pID, int LengthOfBitstream ) -{ - int i = 0; - int rows = 0; - int Parity[4] = {0x00}; - char ID[11] = {0x00}; - int k = 0; - int BitStream[70] = {0x00}; - int counter = 0; - //prepare variables - for ( i = 0; i <= LengthOfBitstream; i++) - { - if (_strBitStream[i] == '1') - { - k =1; - memcpy(&BitStream[i], &k,4); - } - else if (_strBitStream[i] == '0') - { - k = 0; - memcpy(&BitStream[i], &k,4); - } +bool detectFSK(){ + // detect fsk clock + if (!GetFskClock("", FALSE, FALSE)) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM: FSK clock failed"); + return FALSE; } - while ( counter < 2 ) - { - //set/reset variables and counters - memset(ID,0x00,sizeof(ID)); - memset(Parity,0x00,sizeof(Parity)); - rows = 0; - for ( i = 9; i <= LengthOfBitstream; i++) - { - if ( rows < 10 ) - { - if ((BitStream[i] ^ BitStream[i+1] ^ BitStream[i+2] ^ BitStream[i+3]) == BitStream[i+4]) - { - sprintf(ID+rows, "%x", (8 * BitStream[i]) + (4 * BitStream[i+1]) + (2 * BitStream[i+2]) + (1 * BitStream[i+3])); - rows++; - /* Keep parity info and move four bits ahead*/ - Parity[0] ^= BitStream[i]; - Parity[1] ^= BitStream[i+1]; - Parity[2] ^= BitStream[i+2]; - Parity[3] ^= BitStream[i+3]; - i += 4; - } - } - if ( rows == 10 ) - { - if ( BitStream[i] == Parity[0] && BitStream[i+1] == Parity[1] && - BitStream[i+2] == Parity[2] && BitStream[i+3] == Parity[3] && - BitStream[i+4] == 0) - { - memcpy(pID,ID,strlen(ID)); - return 1; - } - } + // demod + int ans = FSKrawDemod("0 0", FALSE); + if (!ans) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM: FSK Demod failed"); + return FALSE; + } + return TRUE; +} +// PSK clocks should be easy to detect ( but difficult to demod a non-repeating pattern... ) +bool detectPSK(){ + int ans = GetPskClock("", FALSE, FALSE); + if (ans <= 0) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM: PSK clock failed"); + return FALSE; + } + //demod + //try psk1 -- 0 0 6 (six errors?!?) + ans = PSKDemod("0 0 6", FALSE); + if (!ans) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM: PSK1 Demod failed"); + + //try psk1 inverted + ans = PSKDemod("0 1 6", FALSE); + if (!ans) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM: PSK1 inverted Demod failed"); + return FALSE; } - printf("[PARITY ->]Failed. Flipping Bits, and rechecking parity for bitstream:\n[PARITY ->]"); - for (k = 0; k < LengthOfBitstream; k++) - { - BitStream[k] ^= 1; - printf("%i", BitStream[k]); + } + // either PSK1 or PSK1 inverted is ok from here. + // lets check PSK2 later. + return TRUE; +} +// try manchester - NOTE: ST only applies to T55x7 tags. +bool detectASK_MAN(){ + bool stcheck = FALSE; + int ans = ASKDemod_ext("0 0 0", FALSE, FALSE, 1, &stcheck); + if (!ans) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM: ASK/Manchester Demod failed"); + return FALSE; + } + return TRUE; +} +bool detectASK_BI(){ + int ans = ASKbiphaseDemod("0 0 1", FALSE); + if (!ans) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM: ASK/biphase normal demod failed"); + + ans = ASKbiphaseDemod("0 1 1", FALSE); + if (!ans) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM: ASK/biphase inverted demod failed"); + return FALSE; } - puts(" "); - counter++; } + return TRUE; +} + +// param: idx - start index in demoded data. +bool setDemodBufferEM(uint32_t *word, size_t idx){ + + //test for even parity bits. + uint8_t parity[45] = {0}; + memcpy( parity, DemodBuffer, 45); + if (!EMwordparitytest(parity) ){ + PrintAndLog("DEBUG: Error - EM Parity tests failed"); + return FALSE; + } + + // test for even parity bits and remove them. (leave out the end row of parities so 36 bits) + if (!removeParity(DemodBuffer, idx + EM_PREAMBLE_LEN, 9, 0, 36)) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM, failed removing parity"); + return FALSE; + } + setDemodBuf(DemodBuffer, 32, 0); + *word = bytebits_to_byteLSBF(DemodBuffer, 32); + return TRUE; +} + +// FSK, PSK, ASK/MANCHESTER, ASK/BIPHASE, ASK/DIPHASE +// should cover 90% of known used configs +// the rest will need to be manually demoded for now... +bool demodEM4x05resp(uint32_t *word) { + size_t idx = 0; + *word = 0; + if (detectASK_MAN() && doPreambleSearch( &idx )) + return setDemodBufferEM(word, idx); + + if (detectASK_BI() && doPreambleSearch( &idx )) + return setDemodBufferEM(word, idx); + + if (detectFSK() && doPreambleSearch( &idx )) + return setDemodBufferEM(word, idx); + + if (detectPSK()) { + if (doPreambleSearch( &idx )) + return setDemodBufferEM(word, idx); + + psk1TOpsk2(DemodBuffer, DemodBufferLen); + if (doPreambleSearch( &idx )) + return setDemodBufferEM(word, idx); + } + return FALSE; +} + +//////////////// 4205 / 4305 commands +int usage_lf_em4x05_dump(void) { + PrintAndLog("Dump EM4x05/EM4x69. Tag must be on antenna. "); + PrintAndLog(""); + PrintAndLog("Usage: lf em 4x05dump [h] "); + PrintAndLog("Options:"); + PrintAndLog(" h - this help"); + PrintAndLog(" pwd - password (hex) (optional)"); + PrintAndLog("samples:"); + PrintAndLog(" lf em 4x05dump"); + PrintAndLog(" lf em 4x05dump 11223344"); return 0; } -//Reads and demodulates an em410x RFID tag. It further allows slight modification to the decoded bitstream -//Once a suitable bitstream has been identified, and if needed, modified, it is replayed. Allowing emulation of the -//"stolen" rfid tag. -//No meaningful returns or arguments. -int MWRem4xReplay(const char* Cmd) -{ - // //header traces - // static char ArrayTraceZero[] = { '0','0','0','0','0','0','0','0','0' }; - // static char ArrayTraceOne[] = { '1','1','1','1','1','1','1','1','1' }; - // //local string variables - // char strClockRate[10] = {0x00}; - // char strAnswer[4] = {0x00}; - // char strTempBufferMini[2] = {0x00}; - // //our outbound bit-stream - // char strSimulateBitStream[65] = {0x00}; - // //integers - // int iClockRate = 0; - // int needle = 0; - // int j = 0; - // int iFirstHeaderOffset = 0x00000000; - // int numManchesterDemodBits=0; - // //boolean values - // bool bInverted = false; - // //pointers to strings. memory will be allocated. - // char* pstrInvertBitStream = 0x00000000; - // char* pTempBuffer = 0x00000000; - // char* pID = 0x00000000; - // char* strBitStreamBuffer = 0x00000000; +int usage_lf_em4x05_read(void) { + PrintAndLog("Read EM4x05/EM4x69. Tag must be on antenna. "); + PrintAndLog(""); + PrintAndLog("Usage: lf em 4x05read [h]
"); + PrintAndLog("Options:"); + PrintAndLog(" h - this help"); + PrintAndLog(" address - memory address to read. (0-15)"); + PrintAndLog(" pwd - password (hex) (optional)"); + PrintAndLog("samples:"); + PrintAndLog(" lf em 4x05read 1"); + PrintAndLog(" lf em 4x05read 1 11223344"); + return 0; +} +int usage_lf_em4x05_write(void) { + PrintAndLog("Write EM4x05/4x69. Tag must be on antenna. "); + PrintAndLog(""); + PrintAndLog("Usage: lf em 4x05write [h]
"); + PrintAndLog("Options:"); + PrintAndLog(" h - this help"); + PrintAndLog(" address - memory address to write to. (0-15)"); + PrintAndLog(" data - data to write (hex)"); + PrintAndLog(" pwd - password (hex) (optional)"); + PrintAndLog("samples:"); + PrintAndLog(" lf em 4x05write 1 deadc0de"); + PrintAndLog(" lf em 4x05write 1 deadc0de 11223344"); + return 0; +} +int usage_lf_em4x05_info(void) { + PrintAndLog("Tag information EM4205/4305/4469//4569 tags. Tag must be on antenna."); + PrintAndLog(""); + PrintAndLog("Usage: lf em 4x05info [h] "); + PrintAndLog("Options:"); + PrintAndLog(" h - this help"); + PrintAndLog(" pwd - password (hex) (optional)"); + PrintAndLog("samples:"); + PrintAndLog(" lf em 4x05info"); + PrintAndLog(" lf em 4x05info deadc0de"); + return 0; +} + +int EM4x05ReadWord_ext(uint8_t addr, uint32_t pwd, bool usePwd, uint32_t *word) { + UsbCommand c = {CMD_EM4X_READ_WORD, {addr, pwd, usePwd}}; + clearCommandBuffer(); + SendCommand(&c); + UsbCommand resp; + if (!WaitForResponseTimeout(CMD_ACK, &resp, 2500)){ + PrintAndLog("Command timed out"); + return -1; + } + if ( !downloadSamplesEM() ) { + return -1; + } + int testLen = (GraphTraceLen < 1000) ? GraphTraceLen : 1000; + if (graphJustNoise(GraphBuffer, testLen)) { + PrintAndLog("no tag found"); + return -1; + } + return demodEM4x05resp(word); +} + +int CmdEM4x05Dump(const char *Cmd) { + uint8_t addr = 0; + uint32_t pwd = 0; + bool usePwd = false; + uint8_t ctmp = param_getchar(Cmd, 0); + if ( ctmp == 'H' || ctmp == 'h' ) return usage_lf_em4x05_dump(); + + // for now use default input of 1 as invalid (unlikely 1 will be a valid password...) + pwd = param_get32ex(Cmd, 0, 1, 16); + + if ( pwd != 1 ) + usePwd = true; + + int success = 1; + uint32_t word = 0; + PrintAndLog("Addr | data | ascii"); + PrintAndLog("-----+--------+------"); + for (; addr < 16; addr++) { + if (addr == 2) { + if (usePwd) { + PrintAndLog(" %02u | %08X", addr, pwd, word ); + } else { + PrintAndLog(" 02 | cannot read"); + } + } else { + success &= EM4x05ReadWord_ext(addr, pwd, usePwd, &word); + } + } - // puts("###################################"); - // puts("#### Em4x Replay ##"); - // puts("#### R.A.M. June 2013 ##"); - // puts("###################################"); - // //initialize - // CmdLFRead(""); - // //Collect ourselves 10,000 samples - // CmdSamples("10000"); - // puts("[->]preforming ASK demodulation\n"); - // //demodulate ask - // Cmdaskdemod("0"); - // iClockRate = DetectClock(0); - // sprintf(strClockRate, "%i\n",iClockRate); - // printf("[->]Detected ClockRate: %s\n", strClockRate); + return success; +} + +int CmdEM4x05Read(const char *Cmd) { + uint8_t addr; + uint32_t pwd; + bool usePwd = false; + uint8_t ctmp = param_getchar(Cmd, 0); + if ( strlen(Cmd) == 0 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_em4x05_read(); + + addr = param_get8ex(Cmd, 0, 50, 10); + pwd = param_get32ex(Cmd, 1, 1, 16); + + if (addr > 15) { + PrintAndLog("Address must be between 0 and 15"); + return 1; + } + if ( pwd == 1 ) { + PrintAndLog("Reading address %02u", addr); + } + else { + usePwd = true; + PrintAndLog("Reading address %02u | password %08X", addr, pwd); + } - // //If detected clock rate is something completely unreasonable, dont go ahead - // if ( iClockRate < 0xFFFE ) - // { - // pTempBuffer = (char*)malloc(MAX_GRAPH_TRACE_LEN); - // if (pTempBuffer == 0x00000000) - // return 0; - // memset(pTempBuffer,0x00,MAX_GRAPH_TRACE_LEN); - // //Preform manchester de-modulation and display in a single line. - // numManchesterDemodBits = CmdManchesterDemod( strClockRate ); - // //note: numManchesterDemodBits is set above in CmdManchesterDemod() - // if ( numManchesterDemodBits == 0 ) - // return 0; - // strBitStreamBuffer = malloc(numManchesterDemodBits+1); - // if ( strBitStreamBuffer == 0x00000000 ) - // return 0; - // memset(strBitStreamBuffer, 0x00, (numManchesterDemodBits+1)); - // //fill strBitStreamBuffer with demodulated, string formatted bits. - // for ( j = 0; j <= numManchesterDemodBits; j++ ) - // { - // sprintf(strTempBufferMini, "%i",BitStream[j]); - // strcat(strBitStreamBuffer,strTempBufferMini); - // } - // printf("[->]Demodulated Bitstream: \n%s\n", strBitStreamBuffer); - // //Reset counter and select most probable bit stream - // j = 0; - // while ( j < numManchesterDemodBits ) - // { - // memset(strSimulateBitStream,0x00,64); - // //search for header of nine (9) 0's : 000000000 or nine (9) 1's : 1111 1111 1 - // if ( ( strncmp(strBitStreamBuffer+j, ArrayTraceZero, sizeof(ArrayTraceZero)) == 0 ) || - // ( strncmp(strBitStreamBuffer+j, ArrayTraceOne, sizeof(ArrayTraceOne)) == 0 ) ) - // { - // iFirstHeaderOffset = j; - // memcpy(strSimulateBitStream, strBitStreamBuffer+j,64); - // printf("[->]Offset of Header"); - // if ( strncmp(strBitStreamBuffer+iFirstHeaderOffset, "0", 1) == 0 ) - // printf("'%s'", ArrayTraceZero ); - // else - // printf("'%s'", ArrayTraceOne ); - // printf(": %i\nHighlighted string : %s\n",iFirstHeaderOffset,strSimulateBitStream); - // //allow us to escape loop or choose another frame - // puts("[<-]Are we happy with this sample? [Y]es/[N]o"); - // gets(strAnswer); - // if ( ( strncmp(strAnswer,"y",1) == 0 ) || ( strncmp(strAnswer,"Y",1) == 0 ) ) - // { - // j = numManchesterDemodBits+1; - // break; - // } - // } - // j++; - // } - // } - // else return 0; + uint32_t word = 0; + int isOk = EM4x05ReadWord_ext(addr, pwd, usePwd, &word); + if (isOk) + PrintAndLog("Address %02d | %08X - %s", addr, word, (addr > 13) ? "Lock" : ""); + else + PrintAndLog("Read Address %02d | failed",addr); + return isOk; +} + +int CmdEM4x05Write(const char *Cmd) { + uint8_t ctmp = param_getchar(Cmd, 0); + if ( strlen(Cmd) == 0 || ctmp == 'H' || ctmp == 'h' ) return usage_lf_em4x05_write(); - // //Do we want the buffer inverted? - // memset(strAnswer, 0x00, sizeof(strAnswer)); - // printf("[<-]Do you wish to invert the highlighted bitstream? [Y]es/[N]o\n"); - // gets(strAnswer); - // if ( ( strncmp("y", strAnswer,1) == 0 ) || ( strncmp("Y", strAnswer, 1 ) == 0 ) ) - // { - // //allocate heap memory - // pstrInvertBitStream = (char*)malloc(numManchesterDemodBits); - // if ( pstrInvertBitStream != 0x00000000 ) - // { - // memset(pstrInvertBitStream,0x00,numManchesterDemodBits); - // bInverted = true; - // //Invert Bitstream - // for ( needle = 0; needle <= numManchesterDemodBits; needle++ ) - // { - // if (strSimulateBitStream[needle] == '0') - // strcat(pstrInvertBitStream,"1"); - // else if (strSimulateBitStream[needle] == '1') - // strcat(pstrInvertBitStream,"0"); - // } - // printf("[->]Inverted bitstream: %s\n", pstrInvertBitStream); - // } - // } - // //Confirm parity of selected string - // pID = (char*)malloc(11); - // if (pID != 0x00000000) - // { - // memset(pID, 0x00, 11); - // if (ConfirmEm410xTagParity(strSimulateBitStream,pID, 64) == 1) - // { - // printf("[->]Parity confirmed for selected bitstream!\n"); - // printf("[->]Tag ID was detected as: [hex]:%s\n",pID ); - // } - // else - // printf("[->]Parity check failed for the selected bitstream!\n"); - // } + bool usePwd = false; + uint8_t addr = 50; // default to invalid address + uint32_t data = 0; // default to blank data + uint32_t pwd = 1; // default to blank password - // //Spoof - // memset(strAnswer, 0x00, sizeof(strAnswer)); - // printf("[<-]Do you wish to continue with the EM4x simulation? [Y]es/[N]o\n"); - // gets(strAnswer); - // if ( ( strncmp(strAnswer,"y",1) == 0 ) || ( strncmp(strAnswer,"Y",1) == 0 ) ) - // { - // strcat(pTempBuffer, strClockRate); - // strcat(pTempBuffer, " "); - // if (bInverted == true) - // strcat(pTempBuffer,pstrInvertBitStream); - // if (bInverted == false) - // strcat(pTempBuffer,strSimulateBitStream); - // //inform the user - // puts("[->]Starting simulation now: \n"); - // //Simulate tag with prepared buffer. - // CmdLFSimManchester(pTempBuffer); - // } - // else if ( ( strcmp("n", strAnswer) == 0 ) || ( strcmp("N", strAnswer ) == 0 ) ) - // printf("[->]Exiting procedure now...\n"); - // else - // printf("[->]Erroneous selection\nExiting procedure now....\n"); + addr = param_get8ex(Cmd, 0, 50, 10); + data = param_get32ex(Cmd, 1, 0, 16); + pwd = param_get32ex(Cmd, 2, 1, 16); - // //Clean up -- Exit function - // //clear memory, then release pointer. - // if ( pstrInvertBitStream != 0x00000000 ) - // { - // memset(pstrInvertBitStream,0x00,numManchesterDemodBits); - // free(pstrInvertBitStream); - // } - // if ( pTempBuffer != 0x00000000 ) - // { - // memset(pTempBuffer,0x00,MAX_GRAPH_TRACE_LEN); - // free(pTempBuffer); - // } - // if ( pID != 0x00000000 ) - // { - // memset(pID,0x00,11); - // free(pID); - // } - // if ( strBitStreamBuffer != 0x00000000 ) - // { - // memset(strBitStreamBuffer,0x00,numManchesterDemodBits); - // free(strBitStreamBuffer); - // } - return 0; + if ( addr > 15 ) { + PrintAndLog("Address must be between 0 and 15"); + return 1; + } + if ( pwd == 1 ) + PrintAndLog("Writing address %d data %08X", addr, data); + else { + usePwd = true; + PrintAndLog("Writing address %d data %08X using password %08X", addr, data, pwd); + } + + uint16_t flag = (addr << 8 ) | usePwd; + + UsbCommand c = {CMD_EM4X_WRITE_WORD, {flag, data, pwd}}; + clearCommandBuffer(); + SendCommand(&c); + UsbCommand resp; + if (!WaitForResponseTimeout(CMD_ACK, &resp, 2000)){ + PrintAndLog("Error occurred, device did not respond during write operation."); + return -1; + } + + if (!downloadSamplesEM()) + return -1; + + //need 0 bits demoded (after preamble) to verify write cmd + uint32_t dummy = 0; + int isOk = demodEM4x05resp(&dummy); + if (isOk) + PrintAndLog("Write Verified"); + else + PrintAndLog("Write could not be verified"); + return isOk; } -int CmdLFEM4X(const char *Cmd) -{ - CmdsParse(CommandTable, Cmd); - return 0; +void printEM4x05config(uint32_t wordData) { + uint16_t datarate = (((wordData & 0x3F)+1)*2); + uint8_t encoder = ((wordData >> 6) & 0xF); + char enc[14]; + memset(enc,0,sizeof(enc)); + + uint8_t PSKcf = (wordData >> 10) & 0x3; + char cf[10]; + memset(cf,0,sizeof(cf)); + uint8_t delay = (wordData >> 12) & 0x3; + char cdelay[33]; + memset(cdelay,0,sizeof(cdelay)); + uint8_t LWR = (wordData >> 14) & 0xF; //last word read + + switch (encoder) { + case 0: snprintf(enc,sizeof(enc),"NRZ"); break; + case 1: snprintf(enc,sizeof(enc),"Manchester"); break; + case 2: snprintf(enc,sizeof(enc),"Biphase"); break; + case 3: snprintf(enc,sizeof(enc),"Miller"); break; + case 4: snprintf(enc,sizeof(enc),"PSK1"); break; + case 5: snprintf(enc,sizeof(enc),"PSK2"); break; + case 6: snprintf(enc,sizeof(enc),"PSK3"); break; + case 7: snprintf(enc,sizeof(enc),"Unknown"); break; + case 8: snprintf(enc,sizeof(enc),"FSK1"); break; + case 9: snprintf(enc,sizeof(enc),"FSK2"); break; + default: snprintf(enc,sizeof(enc),"Unknown"); break; + } + + switch (PSKcf) { + case 0: snprintf(cf,sizeof(cf),"RF/2"); break; + case 1: snprintf(cf,sizeof(cf),"RF/8"); break; + case 2: snprintf(cf,sizeof(cf),"RF/4"); break; + case 3: snprintf(cf,sizeof(cf),"unknown"); break; + } + + switch (delay) { + case 0: snprintf(cdelay, sizeof(cdelay),"no delay"); break; + case 1: snprintf(cdelay, sizeof(cdelay),"BP/8 or 1/8th bit period delay"); break; + case 2: snprintf(cdelay, sizeof(cdelay),"BP/4 or 1/4th bit period delay"); break; + case 3: snprintf(cdelay, sizeof(cdelay),"no delay"); break; + } + PrintAndLog("ConfigWord: %08X (Word 4)\n", wordData); + PrintAndLog("Config Breakdown:", wordData); + PrintAndLog(" Data Rate: %02u | RF/%u", wordData & 0x3F, datarate); + PrintAndLog(" Encoder: %u | %s", encoder, enc); + PrintAndLog(" PSK CF: %u | %s", PSKcf, cf); + PrintAndLog(" Delay: %u | %s", delay, cdelay); + PrintAndLog(" LastWordR: %02u | Address of last word for default read", LWR); + PrintAndLog(" ReadLogin: %u | Read Login is %s", (wordData & 0x40000)>>18, (wordData & 0x40000) ? "Required" : "Not Required"); + PrintAndLog(" ReadHKL: %u | Read Housekeeping Words Login is %s", (wordData & 0x80000)>>19, (wordData & 0x80000) ? "Required" : "Not Required"); + PrintAndLog("WriteLogin: %u | Write Login is %s", (wordData & 0x100000)>>20, (wordData & 0x100000) ? "Required" : "Not Required"); + PrintAndLog(" WriteHKL: %u | Write Housekeeping Words Login is %s", (wordData & 0x200000)>>21, (wordData & 0x200000) ? "Required" : "Not Required"); + PrintAndLog(" R.A.W.: %u | Read After Write is %s", (wordData & 0x400000)>>22, (wordData & 0x400000) ? "On" : "Off"); + PrintAndLog(" Disable: %u | Disable Command is %s", (wordData & 0x800000)>>23, (wordData & 0x800000) ? "Accepted" : "Not Accepted"); + PrintAndLog(" R.T.F.: %u | Reader Talk First is %s", (wordData & 0x1000000)>>24, (wordData & 0x1000000) ? "Enabled" : "Disabled"); + PrintAndLog(" Pigeon: %u | Pigeon Mode is %s\n", (wordData & 0x4000000)>>26, (wordData & 0x4000000) ? "Enabled" : "Disabled"); } -int CmdHelp(const char *Cmd) -{ - CmdsHelp(CommandTable); - return 0; +void printEM4x05info(uint32_t block0, uint32_t serial) { + + uint8_t chipType = (block0 >> 1) & 0xF; + uint8_t cap = (block0 >> 5) & 3; + uint16_t custCode = (block0 >> 9) & 0x3FF; + + switch (chipType) { + case 9: PrintAndLog("\n Chip Type: %u | EM4305", chipType); break; + case 8: PrintAndLog("\n Chip Type: %u | EM4205", chipType); break; + case 4: PrintAndLog(" Chip Type: %u | Unknown", chipType); break; + case 2: PrintAndLog(" Chip Type: %u | EM4469", chipType); break; + //add more here when known + default: PrintAndLog(" Chip Type: %u Unknown", chipType); break; + } + + switch (cap) { + case 3: PrintAndLog(" Cap Type: %u | 330pF",cap); break; + case 2: PrintAndLog(" Cap Type: %u | %spF",cap, (chipType==2)? "75":"210"); break; + case 1: PrintAndLog(" Cap Type: %u | 250pF",cap); break; + case 0: PrintAndLog(" Cap Type: %u | no resonant capacitor",cap); break; + default: PrintAndLog(" Cap Type: %u | unknown",cap); break; + } + + PrintAndLog(" Cust Code: %03u | %s", custCode, (custCode == 0x200) ? "Default": "Unknown"); + if (serial != 0) + PrintAndLog("\n Serial #: %08X\n", serial); +} + +void printEM4x05ProtectionBits(uint32_t word) { + for (uint8_t i = 0; i < 15; i++) { + PrintAndLog(" Word: %02u | %s", i, (((1 << i) & word ) || i < 2) ? "Is Write Locked" : "Is Not Write Locked"); + if (i==14) + PrintAndLog(" Word: %02u | %s", i+1, (((1 << i) & word ) || i < 2) ? "Is Write Locked" : "Is Not Write Locked"); + } +} + +//quick test for EM4x05/EM4x69 tag +bool EM4x05IsBlock0(uint32_t *word) { + return EM4x05ReadWord_ext(0, 0, FALSE, word); +} + +int CmdEM4x05Info(const char *Cmd) { +#define EM_SERIAL_BLOCK 1 +#define EM_CONFIG_BLOCK 4 +#define EM_PROT1_BLOCK 14 +#define EM_PROT2_BLOCK 15 + uint32_t pwd; + uint32_t word = 0, block0 = 0, serial = 0; + bool usePwd = false; + uint8_t ctmp = param_getchar(Cmd, 0); + if ( ctmp == 'H' || ctmp == 'h' ) return usage_lf_em4x05_info(); + + // for now use default input of 1 as invalid (unlikely 1 will be a valid password...) + pwd = param_get32ex(Cmd, 0, 1, 16); + + if ( pwd != 1 ) + usePwd = true; + + // read word 0 (chip info) + // block 0 can be read even without a password. + if ( !EM4x05IsBlock0(&block0) ) + return -1; + + // read word 1 (serial #) doesn't need pwd + // continue if failed, .. non blocking fail. + EM4x05ReadWord_ext(EM_SERIAL_BLOCK, 0, false, &serial); + printEM4x05info(block0, serial); + + // read word 4 (config block) + // needs password if one is set + if ( EM4x05ReadWord_ext(EM_CONFIG_BLOCK, pwd, usePwd, &word) != 1 ) + return 0; + + printEM4x05config(word); + + // read word 14 and 15 to see which is being used for the protection bits + if ( EM4x05ReadWord_ext(EM_PROT1_BLOCK, pwd, usePwd, &word) != 1 ) { + return 0; + } + // if status bit says this is not the used protection word + if (!(word & 0x8000)) { + if ( EM4x05ReadWord_ext(EM_PROT2_BLOCK, pwd, usePwd, &word) != 1 ) + return 0; + } + //something went wrong + if (!(word & 0x8000)) return 0; + printEM4x05ProtectionBits(word); + return 1; +} + +static command_t CommandTable[] = { + {"help", CmdHelp, 1, "This help"}, + {"410xdemod", CmdEMdemodASK, 0, "[findone] -- Extract ID from EM410x tag (option 0 for continuous loop, 1 for only 1 tag)"}, + {"410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag in GraphBuffer"}, + {"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, 0, " <'0' T5555> <'1' T55x7> [clock rate] -- Write EM410x UID to T5555(Q5) or T55x7 tag, optionally setting clock rate"}, + {"4x05dump", CmdEM4x05Dump, 0, "dump EM4205/4305 tag"}, + {"4x05info", CmdEM4x05Info, 0, "tag information EM4x05/EM4x69"}, + {"4x05read", CmdEM4x05Read, 0, "read word data from EM4205/4305"}, + {"4x05write", CmdEM4x05Write, 0, "write word data to EM4205/4305"}, + {"4x50read", CmdEM4x50Read, 0, "read word data from EM4x50"}, + {"4x50write", CmdEM4x50Write, 0, "write word data to EM4x50"}, + {"4x50dump", CmdEM4x50Dump, 0, "dump EM4x50 tag"}, + {NULL, NULL, 0, NULL} +}; + +int CmdLFEM4X(const char *Cmd) { + clearCommandBuffer(); + CmdsParse(CommandTable, Cmd); + return 0; +} + +int CmdHelp(const char *Cmd) { + CmdsHelp(CommandTable); + return 0; }