X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/6e98444637baaa183812fad93cd7c03d645ba95e..360a5b1b3c94d75716ea422dbaa267d8ab39b9de:/client/cmdlfem4x.c diff --git a/client/cmdlfem4x.c b/client/cmdlfem4x.c index 47a5ac3e..02af547a 100644 --- a/client/cmdlfem4x.c +++ b/client/cmdlfem4x.c @@ -11,23 +11,16 @@ #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 CmdEMdemodASK(const char *Cmd) { char cmdp = param_getchar(Cmd, 0); - int findone = (cmdp == '1') ? 1 : 0; + int findone = (cmdp == '1') ? 1 : 0; UsbCommand c={CMD_EM410X_DEMOD}; c.arg[0]=findone; SendCommand(&c); @@ -47,17 +40,14 @@ int CmdEM410xRead(const char *Cmd) uint32_t hi=0; uint64_t lo=0; - if(!AskEm410xDemod("", &hi, &lo)) return 0; + if(!AskEm410xDemod("", &hi, &lo, false)) 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 +55,66 @@ int CmdEM410xRead(const char *Cmd) int CmdEM410xSim(const char *Cmd) { int i, n, j, binary[4], parity[4]; - - char cmdp = param_getchar(Cmd, 0); uint8_t uid[5] = {0x00}; + char cmdp = param_getchar(Cmd, 0); if (cmdp == 'h' || cmdp == 'H') { - PrintAndLog("Usage: lf em4x 410xsim "); + PrintAndLog("Usage: lf em4x em410xsim "); PrintAndLog(""); - PrintAndLog(" sample: lf em4x 410xsim 0F0368568B"); + PrintAndLog(" sample: lf em4x em410xsim 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; } + param_getdec(Cmd, 1, &clock); - PrintAndLog("Starting simulating UID %02X%02X%02X%02X%02X", uid[0],uid[1],uid[2],uid[3],uid[4]); + 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); - /* parity columns */ - AppendGraph(0, clock, parity[0]); - AppendGraph(0, clock, parity[1]); - AppendGraph(0, clock, parity[2]); - AppendGraph(0, clock, parity[3]); + /* 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]; + } - /* stop bit */ + /* 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. @@ -140,7 +129,6 @@ 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) { @@ -151,17 +139,19 @@ int CmdEM410xWatch(const char *Cmd) } CmdLFRead("s"); - getSamples("8192",true); //capture enough to get 2 full messages + getSamples("8201",true); //capture enough to get 2 complete preambles (4096*2+9) } 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: %llu", g_em410xid); CmdLFaskSim(""); return 0; } @@ -170,7 +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); @@ -195,21 +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; } @@ -219,18 +201,17 @@ 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; } @@ -238,7 +219,7 @@ bool EM_EndParityTest(uint8_t *BitStream, size_t size, uint8_t rows, uint8_t col { 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]; @@ -271,7 +252,7 @@ uint32_t OutputEM4x50_Block(uint8_t *BitStream, size_t size, bool verbose, bool 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], @@ -290,7 +271,6 @@ 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 @@ -312,95 +292,106 @@ 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. */ + //completed by Marshmellow int EM4x50Read(const char *Cmd, bool verbose) { - uint8_t fndClk[]={0,8,16,32,40,50,64}; + 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) 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; @@ -410,51 +401,46 @@ 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 @@ -462,26 +448,32 @@ 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 -- 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"}, + {"em410xwrite", CmdEM410xWrite, 0, " <'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"}, @@ -607,14 +599,13 @@ static command_t CommandTable[] = {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; }