X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/02306bac2dc44bd1de5422f9db127b231cde304f..a501c82b196b614295a6e3bf7481da84affb0d8e:/armsrc/iclass.c?ds=sidebyside diff --git a/armsrc/iclass.c b/armsrc/iclass.c index 91a802ca..f53f3041 100644 --- a/armsrc/iclass.c +++ b/armsrc/iclass.c @@ -73,14 +73,13 @@ static struct { int nOutOfCnt; int OutOfCnt; int syncBit; - int parityBits; int samples; int highCnt; int swapper; int counter; int bitBuffer; int dropPosition; - uint8_t *output; + uint8_t *output; } Uart; static RAMFUNC int OutOfNDecoding(int bit) @@ -139,11 +138,8 @@ static RAMFUNC int OutOfNDecoding(int bit) if(Uart.byteCnt == 0) { // Its not straightforward to show single EOFs // So just leave it and do not return TRUE - Uart.output[Uart.byteCnt] = 0xf0; + Uart.output[0] = 0xf0; Uart.byteCnt++; - - // Calculate the parity bit for the client... - Uart.parityBits = 1; } else { return TRUE; @@ -225,12 +221,6 @@ static RAMFUNC int OutOfNDecoding(int bit) if(Uart.bitCnt == 8) { Uart.output[Uart.byteCnt] = (Uart.shiftReg & 0xff); Uart.byteCnt++; - - // Calculate the parity bit for the client... - Uart.parityBits <<= 1; - //Uart.parityBits ^= OddByteParity[(Uart.shiftReg & 0xff)]; - Uart.parityBits ^= oddparity(Uart.shiftReg & 0xff); - Uart.bitCnt = 0; Uart.shiftReg = 0; } @@ -249,12 +239,6 @@ static RAMFUNC int OutOfNDecoding(int bit) Uart.dropPosition--; Uart.output[Uart.byteCnt] = (Uart.dropPosition & 0xff); Uart.byteCnt++; - - // Calculate the parity bit for the client... - Uart.parityBits <<= 1; - //Uart.parityBits ^= OddByteParity[(Uart.dropPosition & 0xff)]; - Uart.parityBits ^= oddparity((Uart.dropPosition & 0xff)); - Uart.bitCnt = 0; Uart.shiftReg = 0; Uart.nOutOfCnt = 0; @@ -315,7 +299,6 @@ static RAMFUNC int OutOfNDecoding(int bit) Uart.state = STATE_START_OF_COMMUNICATION; Uart.bitCnt = 0; Uart.byteCnt = 0; - Uart.parityBits = 0; Uart.nOutOfCnt = 0; Uart.OutOfCnt = 4; // Start at 1/4, could switch to 1/256 Uart.dropPosition = 0; @@ -357,7 +340,6 @@ static struct { int bitCount; int posCount; int syncBit; - int parityBits; uint16_t shiftReg; int buffer; int buffer2; @@ -424,7 +406,6 @@ static RAMFUNC int ManchesterDecoding(int v) Demod.sub = SUB_FIRST_HALF; Demod.bitCount = 0; Demod.shiftReg = 0; - Demod.parityBits = 0; Demod.samples = 0; if(Demod.posCount) { //if(trigger) LED_A_OFF(); // Not useful in this case... @@ -488,9 +469,6 @@ static RAMFUNC int ManchesterDecoding(int v) if(Demod.state == DEMOD_SOF_COMPLETE) { Demod.output[Demod.len] = 0x0f; Demod.len++; - Demod.parityBits <<= 1; - //Demod.parityBits ^= OddByteParity[0x0f]; - Demod.parityBits ^= oddparity(0x0f); Demod.state = DEMOD_UNSYNCD; // error = 0x0f; return TRUE; @@ -571,11 +549,9 @@ static RAMFUNC int ManchesterDecoding(int v) // Tag response does not need to be a complete byte! if(Demod.len > 0 || Demod.bitCount > 0) { if(Demod.bitCount > 1) { // was > 0, do not interpret last closing bit, is part of EOF - Demod.shiftReg >>= (9 - Demod.bitCount); + Demod.shiftReg >>= (9 - Demod.bitCount); // rright align data Demod.output[Demod.len] = Demod.shiftReg & 0xff; Demod.len++; - // No parity bit, so just shift a 0 - Demod.parityBits <<= 1; } Demod.state = DEMOD_UNSYNCD; @@ -612,12 +588,6 @@ static RAMFUNC int ManchesterDecoding(int v) Demod.shiftReg >>= 1; Demod.output[Demod.len] = (Demod.shiftReg & 0xff); Demod.len++; - - // FOR ISO15639 PARITY NOT SEND OTA, JUST CALCULATE IT FOR THE CLIENT - Demod.parityBits <<= 1; - //Demod.parityBits ^= OddByteParity[(Demod.shiftReg & 0xff)]; - Demod.parityBits ^= oddparity((Demod.shiftReg & 0xff)); - Demod.bitCount = 0; Demod.shiftReg = 0; } @@ -674,7 +644,7 @@ void RAMFUNC SnoopIClass(void) // So 32 should be enough! uint8_t *readerToTagCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET); // The response (tag -> reader) that we're receiving. - uint8_t *tagToReaderResponse = (((uint8_t *)BigBuf) + RECV_RES_OFFSET); + uint8_t *tagToReaderResponse = (((uint8_t *)BigBuf) + RECV_RESP_OFFSET); FpgaDownloadAndGo(FPGA_BITSTREAM_HF); @@ -774,10 +744,10 @@ void RAMFUNC SnoopIClass(void) //if(!LogTrace(Uart.output,Uart.byteCnt, rsamples, Uart.parityBits,TRUE)) break; //if(!LogTrace(NULL, 0, Uart.endTime*16 - DELAY_READER_AIR2ARM_AS_SNIFFER, 0, TRUE)) break; - if(tracing) - { - LogTrace(Uart.output,Uart.byteCnt, (GetCountSspClk()-time_0) << 4, Uart.parityBits,TRUE); - LogTrace(NULL, 0, (GetCountSspClk()-time_0) << 4, 0, TRUE); + if(tracing) { + uint8_t parity[MAX_PARITY_SIZE]; + GetParity(Uart.output, Uart.byteCnt, parity); + LogTrace(Uart.output,Uart.byteCnt, (GetCountSspClk()-time_0) << 4, (GetCountSspClk()-time_0) << 4, parity, TRUE); } @@ -798,10 +768,10 @@ void RAMFUNC SnoopIClass(void) rsamples = samples - Demod.samples; LED_B_ON(); - if(tracing) - { - LogTrace(Demod.output,Demod.len, (GetCountSspClk()-time_0) << 4 , Demod.parityBits,FALSE); - LogTrace(NULL, 0, (GetCountSspClk()-time_0) << 4, 0, FALSE); + if(tracing) { + uint8_t parity[MAX_PARITY_SIZE]; + GetParity(Demod.output, Demod.len, parity); + LogTrace(Demod.output, Demod.len, (GetCountSspClk()-time_0) << 4, (GetCountSspClk()-time_0) << 4, parity, FALSE); } @@ -996,7 +966,7 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain { uint8_t mac_responses[64] = { 0 }; - Dbprintf("Going into attack mode"); + Dbprintf("Going into attack mode, %d CSNS sent", numberOfCSNS); // In this mode, a number of csns are within datain. We'll simulate each one, one at a time // in order to collect MAC's from the reader. This can later be used in an offlne-attack // in order to obtain the keys, as in the "dismantling iclass"-paper. @@ -1006,7 +976,7 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain // The usb data is 512 bytes, fitting 65 8-byte CSNs in there. memcpy(csn_crc, datain+(i*8), 8); - if(doIClassSimulation(csn_crc,1,mac_responses)) + if(doIClassSimulation(csn_crc,1,mac_responses+i*8)) { return; // Button pressed } @@ -1029,8 +999,6 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain */ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader_mac_buf) { - - // CSN followed by two CRC bytes uint8_t response2[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; uint8_t response3[] = { 0,0,0,0,0,0,0,0,0,0}; @@ -1081,7 +1049,7 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader // + 1720.. uint8_t *receivedCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET); - memset(receivedCmd, 0x44, RECV_CMD_SIZE); + memset(receivedCmd, 0x44, MAX_FRAME_SIZE); int len; // Prepare card messages @@ -1179,7 +1147,7 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader // dbprintf:ing ... Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x",csn[0],csn[1],csn[2],csn[3],csn[4],csn[5],csn[6],csn[7]); Dbprintf("RDR: (len=%02d): %02x %02x %02x %02x %02x %02x %02x %02x %02x",len, - receivedCmd[0], receivedCmd[1], receivedCmd[2], + receivedCmd[0], receivedCmd[1], receivedCmd[2], receivedCmd[3], receivedCmd[4], receivedCmd[5], receivedCmd[6], receivedCmd[7], receivedCmd[8]); if (reader_mac_buf != NULL) @@ -1221,14 +1189,13 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader } if (tracing) { - LogTrace(receivedCmd,len, (r2t_time-time_0)<< 4, Uart.parityBits,TRUE); - LogTrace(NULL,0, (r2t_time-time_0) << 4, 0,TRUE); + uint8_t parity[MAX_PARITY_SIZE]; + GetParity(receivedCmd, len, parity); + LogTrace(receivedCmd,len, (r2t_time-time_0)<< 4, (r2t_time-time_0) << 4, parity, TRUE); if (respdata != NULL) { - LogTrace(respdata,respsize, (t2r_time-time_0) << 4,SwapBits(GetParity(respdata,respsize),respsize),FALSE); - LogTrace(NULL,0, (t2r_time-time_0) << 4,0,FALSE); - - + GetParity(respdata, respsize, parity); + LogTrace(respdata, respsize, (t2r_time-time_0) << 4, (t2r_time-time_0) << 4, parity, FALSE); } if(!tracing) { DbpString("Trace full"); @@ -1236,7 +1203,7 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader } } - memset(receivedCmd, 0x44, RECV_CMD_SIZE); + memset(receivedCmd, 0x44, MAX_FRAME_SIZE); } //Dbprintf("%x", cmdsRecvd); @@ -1392,7 +1359,6 @@ void ReaderTransmitIClass(uint8_t* frame, int len) { int wait = 0; int samples = 0; - int par = 0; // This is tied to other size changes CodeIClassCommand(frame,len); @@ -1403,7 +1369,11 @@ void ReaderTransmitIClass(uint8_t* frame, int len) LED_A_ON(); // Store reader command in buffer - if (tracing) LogTrace(frame,len,rsamples,par,TRUE); + if (tracing) { + uint8_t par[MAX_PARITY_SIZE]; + GetParity(frame, len, par); + LogTrace(frame, len, rsamples, rsamples, par, TRUE); + } } //----------------------------------------------------------------------------- @@ -1459,7 +1429,11 @@ int ReaderReceiveIClass(uint8_t* receivedAnswer) int samples = 0; if (!GetIClassAnswer(receivedAnswer,160,&samples,0)) return FALSE; rsamples += samples; - if (tracing) LogTrace(receivedAnswer,Demod.len,rsamples,Demod.parityBits,FALSE); + if (tracing){ + uint8_t parity[MAX_PARITY_SIZE]; + GetParity(receivedAnswer, Demod.len, parity); + LogTrace(receivedAnswer,Demod.len,rsamples,rsamples,parity,FALSE); + } if(samples == 0) return FALSE; return Demod.len; } @@ -1499,7 +1473,7 @@ void ReaderIClass(uint8_t arg0) { uint8_t card_data[24]={0}; uint8_t last_csn[8]={0}; - uint8_t* resp = (((uint8_t *)BigBuf) + 3560); // was 3560 - tied to other size changes + uint8_t *resp = (((uint8_t *)BigBuf) + RECV_RESP_OFFSET); int read_status= 0; bool abort_after_read = arg0 & FLAG_ICLASS_READER_ONLY_ONCE; @@ -1590,7 +1564,7 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) { int keyaccess; } memory; - uint8_t* resp = (((uint8_t *)BigBuf) + 3560); // was 3560 - tied to other size changes + uint8_t* resp = (((uint8_t *)BigBuf) + RECV_RESP_OFFSET); setupIclassReader(); @@ -1709,7 +1683,7 @@ void IClass_iso14443A_write(uint8_t arg0, uint8_t blockNo, uint8_t *data, uint8_ uint16_t crc = 0; - uint8_t* resp = (((uint8_t *)BigBuf) + 3560); // was 3560 - tied to other size changes + uint8_t* resp = (((uint8_t *)BigBuf) + RECV_RESP_OFFSET); // Reset trace buffer memset(trace, 0x44, RECV_CMD_OFFSET);