X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/2767fc02919545bd65082b4682b2331def9a5ad5..e1778858ddc53a6a82e8ee24f02e6b673687f69a:/client/cmdlfem4x.c?ds=inline diff --git a/client/cmdlfem4x.c b/client/cmdlfem4x.c index 552c256e..59a1eef3 100644 --- a/client/cmdlfem4x.c +++ b/client/cmdlfem4x.c @@ -8,28 +8,31 @@ // Low frequency EM4x commands //----------------------------------------------------------------------------- -#include -#include -#include -#include "proxmark3.h" -#include "ui.h" -#include "util.h" -#include "graph.h" -#include "cmdparser.h" -#include "cmddata.h" -#include "cmdlf.h" #include "cmdlfem4x.h" -#include "lfdemod.h" -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; } @@ -44,20 +47,13 @@ int CmdEMdemodASK(const char *Cmd) */ int CmdEM410xRead(const char *Cmd) { - uint32_t hi=0; - uint64_t lo=0; + uint32_t hi = 0; + uint64_t lo = 0; + + if(!AskEm410xDemod("", &hi, &lo, false)) return 0; - if(!AskEm410xDemod("", &hi, &lo)) return 0; - PrintAndLog("EM410x pattern found: "); printEM410x(hi, lo); - if (hi){ - PrintAndLog ("EM410x XL pattern found"); - return 0; - } - char id[12] = {0x00}; - sprintf(id, "%010llx",lo); - - global_em410xId = id; + g_em410xid = lo; return 1; } @@ -65,67 +61,63 @@ int CmdEM410xRead(const char *Cmd) 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]; - } + /* 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]); - /* parity columns */ - AppendGraph(0, clock, parity[0]); - AppendGraph(0, clock, parity[1]); - AppendGraph(0, clock, parity[2]); - AppendGraph(0, clock, parity[3]); + /* append parity bit */ + AppendGraph(0, clock, binary[0] ^ binary[1] ^ binary[2] ^ binary[3]); - /* stop bit */ + /* 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("0"); //240 start_gap. @@ -141,26 +133,25 @@ int CmdEM410xSim(const char *Cmd) * Changed by martin, 4000 x 4 = 16000, * see http://www.proxmark.org/forum/viewtopic.php?pid=7235#p7235 */ -int CmdEM410xWatch(const char *Cmd) -{ +int CmdEM410xWatch(const char *Cmd) { do { if (ukbhit()) { printf("\naborted via keyboard!\n"); break; - } - + } CmdLFRead("s"); - getSamples("8201",true); //capture enough to get 2 complete preambles (4096*2+9) + 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 captured ID: %s",global_em410xId); + PrintAndLog("# Replaying captured ID: %" PRIu64 , g_em410xid); CmdLFaskSim(""); return 0; } @@ -169,7 +160,7 @@ 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 + uint32_t clock = 0; // invalid clock value sscanf(Cmd, "%" PRIx64 " %d %d", &id, &card, &clock); @@ -194,21 +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; } @@ -218,59 +201,139 @@ 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); - 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; + if (rows*cols>size) return FALSE; uint8_t colP=0; - //assume last row is a parity row and do not test + //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; + if (colP != pType) return FALSE; } - return true; + return TRUE; } bool EM_ByteParityTest(uint8_t *BitStream, size_t size, uint8_t rows, uint8_t cols, uint8_t pType) { - if (rows*cols>size) return false; + 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; + if (rowP != pType) return FALSE; + } + return TRUE; +} + +// EM word parity test. +// 9*5 = 45 bits in total +// 012345678|r1 +// 012345678|r2 +// 012345678|r3 +// 012345678|r4 +// ------------ +//c012345678| 0 +// |- must be zero + +bool EMwordparitytest(uint8_t *bits){ + + // last row/col parity must be 0 + if (bits[44] != 0 ) return FALSE; + + // 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; + } } - return true; + // 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; } uint32_t OutputEM4x50_Block(uint8_t *BitStream, size_t size, bool verbose, bool pTest) { 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(""); + 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], @@ -289,10 +352,11 @@ uint32_t OutputEM4x50_Block(uint8_t *BitStream, size_t size, bool verbose, bool else PrintAndLog("Parity Failed"); } - //PrintAndLog("Code: %08x",code); return code; } -/* Read the transmitted data of an EM4x50 tag + + +/* Read the transmitted data of an EM4x50 tag from the graphbuffer * Format: * * XXXXXXXX [row parity bit (even)] <- 8 bits plus parity @@ -311,95 +375,108 @@ uint32_t OutputEM4x50_Block(uint8_t *BitStream, size_t size, bool verbose, bool * is stored in the blocks defined in the control word First and Last * Word Read values. UID is stored in block 32. */ -int EM4x50Read(const char *Cmd, bool verbose) -{ - uint8_t fndClk[]={0,8,16,32,40,50,64}; + //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; - sscanf(Cmd, "%i %i", &clk, &invert); int tol = 0; int i, j, startblock, skip, block, start, end, low, high, minClk; - bool complete= false; + bool complete = false; int tmpbuff[MAX_GRAPH_TRACE_LEN / 64]; - save_restoreGB(1); uint32_t Code[6]; char tmp[6]; - char tmp2[20]; - high= low= 0; + 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++) - { + 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; - minClk= 255; - while (i < GraphTraceLen) - { + 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 low) && (i < GraphTraceLen)) ++i; start= i; - while ((GraphBuffer[i] < high) && (i low) && (i low) && (i < GraphTraceLen)) ++i; if (j>=(MAX_GRAPH_TRACE_LEN/64)) { break; } tmpbuff[j++]= i - start; - if (i-start < minClk) minClk = i-start; + if (i-start < minClk && i < GraphTraceLen) { + minClk = i - start; + } } // set clock - if (!clk){ + if (!clk) { for (uint8_t clkCnt = 0; clkCnt<7; clkCnt++) { tol = fndClk[clkCnt]/8; - if (fndClk[clkCnt]-tol >= minClk) { + 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; - skip= 0; - for (i= 0; i < j - 4 ; ++i) - { + start = -1; + for (i= 0; i < j - 4 ; ++i) { skip += tmpbuff[i]; - if (tmpbuff[i] >= clk*3-tol && tmpbuff[i] <= clk*3+tol) - if (tmpbuff[i+1] >= clk*2-tol && tmpbuff[i+1] <= clk*2+tol) - if (tmpbuff[i+2] >= clk*3-tol && tmpbuff[i+2] <= clk*3+tol) - if (tmpbuff[i+3] >= clk-tol) + 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; + startblock = i + 4; // skip over the remainder of LW - skip += tmpbuff[i+1] + tmpbuff[i+2] + clk + clk/8; - - int phaseoff = tmpbuff[i+3]-clk; - + 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) - { + for (i += 3; i < j - 4 ; ++i) { end += tmpbuff[i]; - if (tmpbuff[i] >= clk*3-tol && tmpbuff[i] <= clk*3 + tol) - if (tmpbuff[i+1] >= clk*2-tol && tmpbuff[i+1] <= clk*2 + tol) - if (tmpbuff[i+2] >= clk*3-tol && tmpbuff[i+2] <= clk*3 + tol) - if (tmpbuff[i+3] >= clk-tol) + 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; @@ -409,51 +486,46 @@ int EM4x50Read(const char *Cmd, bool verbose) // report back if (verbose || g_debugMode) { if (start >= 0) { - PrintAndLog("\nNote: should print 45 bits then 0177 (end of block)"); - PrintAndLog(" for each block"); - PrintAndLog(" Also, sometimes the demod gets out of sync and "); - PrintAndLog(" inverts the output - when this happens the 0177"); - PrintAndLog(" will be 3 extra 1's at the end"); - PrintAndLog(" 'data askedge' command may fix that"); + PrintAndLog("\nNote: one block = 50 bits (32 data, 12 parity, 6 marker)"); } else { - PrintAndLog("No data found!"); + 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; } - if (!complete) - { - PrintAndLog("*** Warning!"); - PrintAndLog("Partial data - no end found!"); - PrintAndLog("Try again with more samples."); - } } else if (start < 0) return 0; - start=skip; + 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); + snprintf(tmp, sizeof(tmp), "%i", skip); CmdLtrim(tmp); bool pTest; - bool AllPTest=true; + bool AllPTest = true; // now work through remaining buffer printing out data blocks block = 0; i = startblock; - while (block < 6) - { + while (block < 6) { if (verbose || g_debugMode) PrintAndLog("\nBlock %i:", block); skip = phaseoff; // look for LW before start of next block - for ( ; i < j - 4 ; ++i) - { + 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; - phaseoff = tmpbuff[i+1]-clk; + if (tmpbuff[i+1]>clk) + phaseoff = tmpbuff[i+1]-clk; + else + phaseoff = 0; i += 2; - if (ASKmanDemod(tmp2, false, false)<1) return 0; + if (ASKDemod(tmp2, false, false, 1) < 1) { + save_restoreGB(0); + return 0; + } //set DemodBufferLen to just one block DemodBufferLen = skip/clk; //test parities @@ -461,26 +533,32 @@ int EM4x50Read(const char *Cmd, bool verbose) 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",start, skip/clk); + 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 + if (i >= end) break; //in case chip doesn't output 6 blocks } //print full code: if (verbose || g_debugMode || AllPTest){ - PrintAndLog("Found data at sample: %i - using clock: %i",skip,clk); - //PrintAndLog("\nSummary:"); - end=block; - for (block=0; block 15) | (Word < 0) ) { - PrintAndLog("Word must be between 0 and 15"); - return 1; + // 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}; - PrintAndLog("Reading word %d", Word); + 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; +} + +bool detectFSK(){ + // detect fsk clock + if (!GetFskClock("", FALSE, FALSE)) { + if (g_debugMode) PrintAndLog("DEBUG: Error - EM: FSK clock failed"); + return FALSE; + } + // 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; + } + } + // 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; + } + } + 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); - 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); + 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; +} +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 CmdReadWordPWD(const char *Cmd) -{ - int Word = -1; //default to invalid word - int Password = 0xFFFFFFFF; //default to blank password - UsbCommand c; +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); - sscanf(Cmd, "%d %x", &Word, &Password); + 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); + } + } + + 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 ( (Word > 15) | (Word < 0) ) { - PrintAndLog("Word must be between 0 and 15"); + 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); + } - 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; + 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 CmdWriteWord(const char *Cmd) -{ - int Word = 16; //default to invalid block - int Data = 0xFFFFFFFF; //default to blank data - UsbCommand c; +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(); + + 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 - sscanf(Cmd, "%x %d", &Data, &Word); + addr = param_get8ex(Cmd, 0, 50, 10); + data = param_get32ex(Cmd, 1, 0, 16); + pwd = param_get32ex(Cmd, 2, 1, 16); - if (Word > 15) { - PrintAndLog("Word must be between 0 and 15"); + 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); + } - PrintAndLog("Writing word %d with data %08X", Word, Data); + uint16_t flag = (addr << 8 ) | usePwd; - 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; + UsbCommand c = {CMD_EM4X_WRITE_WORD, {flag, data, pwd}}; + clearCommandBuffer(); SendCommand(&c); - return 0; + 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 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); +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"); +} + +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; - if (Word > 15) { - PrintAndLog("Word must be between 0 and 15"); - return 1; + 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); - PrintAndLog("Writing word %d with data %08X and password %08X", Word, Data, Password); + if ( pwd != 1 ) + usePwd = true; + + // read word 0 (chip info) + // block 0 can be read even without a password. + if ( !EM4x05IsBlock0(&block0) ) + return -1; - 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; + // 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"}, - {"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"}, +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) -{ +int CmdLFEM4X(const char *Cmd) { + clearCommandBuffer(); CmdsParse(CommandTable, Cmd); return 0; } -int CmdHelp(const char *Cmd) -{ +int CmdHelp(const char *Cmd) { CmdsHelp(CommandTable); return 0; }