X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/6980d66b054071c75dfa522ad36eda97a2556159..893534d3b5753b110b84144596da6c6d0815c1cc:/client/cmdlfem4x.c diff --git a/client/cmdlfem4x.c b/client/cmdlfem4x.c index 1ecf64d5..e0c415bb 100644 --- a/client/cmdlfem4x.c +++ b/client/cmdlfem4x.c @@ -228,6 +228,7 @@ int CmdEM410xWrite(const char *Cmd) return 0; } +//**************** Start of EM4x50 Code ************************ bool EM_EndParityTest(uint8_t *BitStream, size_t size, uint8_t rows, uint8_t cols, uint8_t pType) { if (rows*cols>size) return false; @@ -499,6 +500,7 @@ int CmdEM4x50Read(const char *Cmd) return EM4x50Read(Cmd, true); } +//**************** Start of EM4x05/EM4x69 Code ************************ int usage_lf_em_read(void) { PrintAndLog("Read EM4x05/EM4x69. Tag must be on antenna. "); PrintAndLog(""); @@ -513,64 +515,47 @@ int usage_lf_em_read(void) { return 0; } -//search for given preamble in given BitStream and return success=1 or fail=0 and startIndex -bool EMpreambleSearch(uint8_t *BitStream, uint8_t *preamble, size_t pLen, size_t size, size_t *startIdx) { - // Sanity check. If preamble length is bigger than bitstream length. - if ( size <= pLen ) return false; - // em only sends preamble once, so look for it once in the first x bits - uint8_t foundCnt = 0; - for (size_t idx = 0; idx < size - pLen; idx++){ - if (memcmp(BitStream+idx, preamble, pLen) == 0){ - //first index found - foundCnt++; - if (foundCnt == 1) { - if (g_debugMode) PrintAndLog("DEBUG: preamble found at %u", idx); - *startIdx = idx; - - return true; - } - } +// for command responses from em4x05 or em4x69 +// download samples from device and copy them to the Graphbuffer +bool downloadSamplesEM() { + // 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, 4000) ) { + PrintAndLog("command execution time out"); + return false; } - return false; + setGraphBuf(got, sizeof(got)); + return true; } bool EM4x05testDemodReadData(uint32_t *word, bool readCmd) { - // skip first two 0 bits as they might have been missed in the demod - uint8_t preamble[6] = {0,0,1,0,1,0}; + // em4x05/em4x69 preamble is 00001010 + // skip first two 0 bits as they might have been missed in the demod + uint8_t preamble[] = {0,0,1,0,1,0}; size_t startIdx = 0; - // set size to 15 to only test first 9 positions for the preamble - size_t size = (15 > DemodBufferLen) ? DemodBufferLen : 15; - startIdx = 0; + // set size to 20 to only test first 14 positions for the preamble + size_t size = (20 > DemodBufferLen) ? DemodBufferLen : 20; //test preamble - bool errChk = EMpreambleSearch(DemodBuffer, preamble, sizeof(preamble), size, &startIdx); - if ( !errChk ) { + if ( !onePreambleSearch(DemodBuffer, preamble, sizeof(preamble), size, &startIdx) ) { if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305 preamble not found :: %d", startIdx); return false; } + // if this is a readword command, get the read bytes and test the parities if (readCmd) { + if (!EM_EndParityTest(DemodBuffer + startIdx + sizeof(preamble), 45, 5, 9, 0)) { + if (g_debugMode) PrintAndLog("DEBUG: Error - End Parity check failed"); + return false; + } //test for even parity bits. - size = removeParity(DemodBuffer, startIdx + sizeof(preamble),9,0,44); - if (size == 0) { + if ( removeParity(DemodBuffer, startIdx + sizeof(preamble),9,0,44) == 0 ) { if (g_debugMode) PrintAndLog("DEBUG: Error - Parity not detected"); return false; } - //todo test last 8 bits for even parity || (xor) - setDemodBuf(DemodBuffer, 40, 0); - - *word = bytebits_to_byteLSBF(DemodBuffer , 32); - - uint8_t lo = (uint8_t) bytebits_to_byteLSBF(DemodBuffer , 8); - uint8_t lo2 = (uint8_t) bytebits_to_byteLSBF(DemodBuffer + 8, 8); - uint8_t hi = (uint8_t) bytebits_to_byteLSBF(DemodBuffer + 16, 8); - uint8_t hi2 = (uint8_t) bytebits_to_byteLSBF(DemodBuffer + 24, 8); - uint8_t cs = (uint8_t) bytebits_to_byteLSBF(DemodBuffer + 32, 8); - uint8_t cs2 = lo ^ lo2 ^ hi ^ hi2; - if (g_debugMode) PrintAndLog("EM4x05/4x69 : %08X CS: %02X %s",*word,cs, (cs2==cs) ? "Passed" : "Failed"); - - return (cs2==cs) ? true : false; + *word = bytebits_to_byteLSBF(DemodBuffer, 32); } return true; } @@ -580,14 +565,13 @@ bool EM4x05testDemodReadData(uint32_t *word, bool readCmd) { // the rest will need to be manually demoded for now... int demodEM4x05resp(uint32_t *word, bool readCmd) { int ans = 0; - DemodBufferLen = 0x00; // test for FSK wave (easiest to 99% ID) - if (GetFskClock("", FALSE, FALSE)) { + if (GetFskClock("", false, false)) { //valid fsk clocks found ans = FSKrawDemod("0 0", false); if (!ans) { - if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: FSK Demod failed"); + if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: FSK Demod failed, ans: %d", ans); } else { if (EM4x05testDemodReadData(word, readCmd)) { return 1; @@ -595,13 +579,12 @@ int demodEM4x05resp(uint32_t *word, bool readCmd) { } } // PSK clocks should be easy to detect ( but difficult to demod a non-repeating pattern... ) - ans = GetPskClock("", FALSE, FALSE); + ans = GetPskClock("", false, false); if (ans>0) { //try psk1 - DemodBufferLen = 0x00; - ans = PSKDemod("0 0 6", FALSE); + ans = PSKDemod("0 0 6", false); if (!ans) { - if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: PSK1 Demod failed"); + if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: PSK1 Demod failed, ans: %d", ans); } else { if (EM4x05testDemodReadData(word, readCmd)) { return 1; @@ -613,10 +596,9 @@ int demodEM4x05resp(uint32_t *word, bool readCmd) { } } //try psk1 inverted - DemodBufferLen = 0x00; - ans = PSKDemod("0 1 6", FALSE); + ans = PSKDemod("0 1 6", false); if (!ans) { - if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: PSK1 Demod failed"); + if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: PSK1 Demod failed, ans: %d", ans); } else { if (EM4x05testDemodReadData(word, readCmd)) { return 1; @@ -631,35 +613,32 @@ int demodEM4x05resp(uint32_t *word, bool readCmd) { } } - // more common than biphase - DemodBufferLen = 0x00; + // manchester is more common than biphase... try first bool stcheck = false; // try manchester - NOTE: ST only applies to T55x7 tags. ans = ASKDemod_ext("0,0,1", false, false, 1, &stcheck); if (!ans) { - if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/Manchester Demod failed"); + if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/Manchester Demod failed, ans: %d", ans); } else { if (EM4x05testDemodReadData(word, readCmd)) { return 1; } } - DemodBufferLen = 0x00; //try biphase - ans = ASKbiphaseDemod("0 0 1", FALSE); + ans = ASKbiphaseDemod("0 0 1", false); if (!ans) { - if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/biphase Demod failed"); + if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/biphase Demod failed, ans: %d", ans); } else { if (EM4x05testDemodReadData(word, readCmd)) { return 1; } } - DemodBufferLen = 0x00; //try diphase (differential biphase or inverted) - ans = ASKbiphaseDemod("0 1 1", FALSE); + ans = ASKbiphaseDemod("0 1 1", false); if (!ans) { - if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/biphase Demod failed"); + if (g_debugMode) PrintAndLog("DEBUG: Error - EM4305: ASK/biphase Demod failed, ans: %d", ans); } else { if (EM4x05testDemodReadData(word, readCmd)) { return 1; @@ -669,7 +648,7 @@ int demodEM4x05resp(uint32_t *word, bool readCmd) { return -1; } -int EM4x05ReadWord(uint8_t addr, uint32_t pwd, bool usePwd) { +int EM4x05ReadWord_ext(uint8_t addr, uint32_t pwd, bool usePwd, uint32_t *wordData) { UsbCommand c = {CMD_EM4X_READ_WORD, {addr, pwd, usePwd}}; clearCommandBuffer(); SendCommand(&c); @@ -678,23 +657,26 @@ int EM4x05ReadWord(uint8_t addr, uint32_t pwd, bool usePwd) { PrintAndLog("Command timed out"); return -1; } - - uint8_t got[6000]; - GetFromBigBuf(got, sizeof(got), 0); - if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2500) ) { - PrintAndLog("command execution time out"); + if ( !downloadSamplesEM() ) { return -1; } - setGraphBuf(got, sizeof(got)); int testLen = (GraphTraceLen < 1000) ? GraphTraceLen : 1000; if (graphJustNoise(GraphBuffer, testLen)) { PrintAndLog("no tag not found"); return -1; } //attempt demod: + return demodEM4x05resp(wordData, true); +} + +int EM4x05ReadWord(uint8_t addr, uint32_t pwd, bool usePwd) { uint32_t wordData = 0; - int success = demodEM4x05resp(&wordData, true); - if (success == 1) PrintAndLog("Got Address %02d | %08X",addr,wordData); + int success = EM4x05ReadWord_ext(addr, pwd, usePwd, &wordData); + if (success == 1) + PrintAndLog(" Got Address %02d | %08X",addr,wordData); + else + PrintAndLog("Read Address %02d | failed",addr); + return success; } @@ -713,12 +695,13 @@ int CmdEM4x05ReadWord(const char *Cmd) { PrintAndLog("Address must be between 0 and 15"); return 1; } - if ( pwd == 1 ) + if ( pwd == 1 ) { PrintAndLog("Reading address %02u", addr); - else { + } else { usePwd = true; PrintAndLog("Reading address %02u | password %08X", addr, pwd); } + return EM4x05ReadWord(addr, pwd, usePwd); } @@ -752,9 +735,9 @@ int CmdEM4x05dump(const char *Cmd) { for (; addr < 16; addr++) { if (addr == 2) { if (usePwd) { - PrintAndLog("PWD Address %02u | %08X",addr,pwd); + PrintAndLog(" PWD Address %02u | %08X",addr,pwd); } else { - PrintAndLog("PWD Address 02 | cannot read"); + PrintAndLog(" PWD Address 02 | cannot read"); } } else { success &= EM4x05ReadWord(addr, pwd, usePwd); @@ -816,14 +799,9 @@ int CmdEM4x05WriteWord(const char *Cmd) { PrintAndLog("Error occurred, device did not respond during write operation."); return -1; } - //get response if there is one - uint8_t got[6000]; // 8 bit preamble + 32 bit word response (max clock (128) * 40bits = 5120 samples) - GetFromBigBuf(got, sizeof(got), 0); - if ( !WaitForResponseTimeout(CMD_ACK, NULL, 4000) ) { - PrintAndLog("command execution time out"); - return 0; + if ( !downloadSamplesEM() ) { + return -1; } - setGraphBuf(got, sizeof(got)); //check response for 00001010 for write confirmation! //attempt demod: uint32_t dummy = 0; @@ -834,6 +812,74 @@ int CmdEM4x05WriteWord(const char *Cmd) { return result; } +void printEM4x05info(uint8_t chipType, uint8_t cap, uint16_t custCode, uint32_t serial) { + switch (chipType) { + case 9: PrintAndLog("\nChip Type: %u | EM4305", 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 | 210pF",cap); break; + case 1: PrintAndLog(" Cap Type: %u | 250pF",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); + } +} + +//quick test for EM4x05/EM4x69 tag +bool EM4x05Block0Test(uint32_t *wordData) { + if (EM4x05ReadWord_ext(0,0,false,wordData) == 1) { + return true; + } + return false; +} + +int CmdEM4x05info(const char *Cmd) { + //uint8_t addr = 0; + //uint32_t pwd; + uint32_t wordData = 0; + // bool usePwd = false; + uint8_t ctmp = param_getchar(Cmd, 0); + if ( ctmp == 'H' || ctmp == 'h' ) return usage_lf_em_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; + // read blk 0 + + //block 0 can be read even without a password. + if ( !EM4x05Block0Test(&wordData) ) + return -1; + + uint8_t chipType = (wordData >> 1) & 0xF; + uint8_t cap = (wordData >> 5) & 3; + uint16_t custCode = (wordData >> 9) & 0x3FF; + + wordData = 0; + if (EM4x05ReadWord_ext(1, 0, false, &wordData) != 1) { + //failed, but continue anyway... + } + printEM4x05info(chipType, cap, custCode, wordData); + + // add read block 4 and read out config if successful + // needs password if one is set + + return success; +} + + static command_t CommandTable[] = { {"help", CmdHelp, 1, "This help"}, @@ -843,9 +889,10 @@ static command_t CommandTable[] = {"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, 1, "(pwd) -- Read EM4x05/EM4x69 all word data"}, - {"4x05readword", CmdEM4x05ReadWord, 1, " (pwd) -- Read EM4x05/EM4x69 word data"}, - {"4x05writeword", CmdEM4x05WriteWord, 1, " (pwd) -- Write EM4x05/EM4x69 word data"}, + {"4x05dump", CmdEM4x05dump, 0, "(pwd) -- Read EM4x05/EM4x69 all word data"}, + {"4x05info", CmdEM4x05info, 0, "(pwd) -- Get info from EM4x05/EM4x69 tag"}, + {"4x05readword", CmdEM4x05ReadWord, 0, " (pwd) -- Read EM4x05/EM4x69 word data"}, + {"4x05writeword", CmdEM4x05WriteWord, 0, " (pwd) -- Write EM4x05/EM4x69 word data"}, {"4x50read", CmdEM4x50Read, 1, "demod data from EM4x50 tag from the graph buffer"}, {NULL, NULL, 0, NULL} };