X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/0387cd3393d87edf07cdd37dc942b6e561ce499a..refs/pull/862/head:/armsrc/iclass.c diff --git a/armsrc/iclass.c b/armsrc/iclass.c index a976217d..2533d1f9 100644 --- a/armsrc/iclass.c +++ b/armsrc/iclass.c @@ -12,7 +12,7 @@ //----------------------------------------------------------------------------- // Based on ISO14443a implementation. Still in experimental phase. // Contribution made during a security research at Radboud University Nijmegen -// +// // Please feel free to contribute and extend iClass support!! //----------------------------------------------------------------------------- // @@ -21,7 +21,7 @@ // We still have sometimes a demodulation error when snooping iClass communication. // The resulting trace of a read-block-03 command may look something like this: // -// + 22279: : 0c 03 e8 01 +// + 22279: : 0c 03 e8 01 // // ...with an incorrect answer... // @@ -31,193 +31,194 @@ // // A correct trace should look like this: // -// + 21112: : 0c 03 e8 01 -// + 85: 0: TAG ff ff ff ff ff ff ff ff ea f5 +// + 21112: : 0c 03 e8 01 +// + 85: 0: TAG ff ff ff ff ff ff ff ff ea f5 // //----------------------------------------------------------------------------- +#include "iclass.h" + #include "proxmark3.h" #include "apps.h" #include "util.h" #include "string.h" +#include "printf.h" #include "common.h" #include "cmd.h" +#include "iso14443a.h" +#include "iso15693.h" // Needed for CRC in emulation mode; // same construction as in ISO 14443; // different initial value (CRC_ICLASS) #include "iso14443crc.h" #include "iso15693tools.h" -#include "cipher.h" #include "protocols.h" -static int timeout = 4096; +#include "optimized_cipher.h" +#include "usb_cdc.h" // for usb_poll_validate_length +#include "fpgaloader.h" +static int timeout = 4096; -static int SendIClassAnswer(uint8_t *resp, int respLen, int delay); +// iCLASS has a slightly different timing compared to ISO15693. According to the picopass data sheet the tag response is expected 330us after +// the reader command. This is measured from end of reader EOF to first modulation of the tag's SOF which starts with a 56,64us unmodulated period. +// 330us = 140 ssp_clk cycles @ 423,75kHz when simulating. +// 56,64us = 24 ssp_clk_cycles +#define DELAY_ICLASS_VCD_TO_VICC_SIM 140 +#define TAG_SOF_UNMODULATED 24 //----------------------------------------------------------------------------- // The software UART that receives commands from the reader, and its state // variables. //----------------------------------------------------------------------------- static struct { - enum { - STATE_UNSYNCD, - STATE_START_OF_COMMUNICATION, - STATE_RECEIVING - } state; - uint16_t shiftReg; - int bitCnt; - int byteCnt; - int byteCntMax; - int posCnt; - int nOutOfCnt; - int OutOfCnt; - int syncBit; - int samples; - int highCnt; - int swapper; - int counter; - int bitBuffer; - int dropPosition; - uint8_t *output; + enum { + STATE_UNSYNCD, + STATE_START_OF_COMMUNICATION, + STATE_RECEIVING + } state; + uint16_t shiftReg; + int bitCnt; + int byteCnt; + int byteCntMax; + int posCnt; + int nOutOfCnt; + int OutOfCnt; + int syncBit; + int samples; + int highCnt; + int swapper; + int counter; + int bitBuffer; + int dropPosition; + uint8_t *output; } Uart; -static RAMFUNC int OutOfNDecoding(int bit) -{ +static RAMFUNC int OutOfNDecoding(int bit) { //int error = 0; int bitright; - if(!Uart.bitBuffer) { + if (!Uart.bitBuffer) { Uart.bitBuffer = bit ^ 0xFF0; - return FALSE; - } - else { + return false; + } else { Uart.bitBuffer <<= 4; Uart.bitBuffer ^= bit; } - - /*if(Uart.swapper) { + + /*if (Uart.swapper) { Uart.output[Uart.byteCnt] = Uart.bitBuffer & 0xFF; Uart.byteCnt++; Uart.swapper = 0; - if(Uart.byteCnt > 15) { return TRUE; } + if (Uart.byteCnt > 15) { return true; } } else { Uart.swapper = 1; }*/ - if(Uart.state != STATE_UNSYNCD) { + if (Uart.state != STATE_UNSYNCD) { Uart.posCnt++; - if((Uart.bitBuffer & Uart.syncBit) ^ Uart.syncBit) { + if ((Uart.bitBuffer & Uart.syncBit) ^ Uart.syncBit) { bit = 0x00; - } - else { + } else { bit = 0x01; } - if(((Uart.bitBuffer << 1) & Uart.syncBit) ^ Uart.syncBit) { + if (((Uart.bitBuffer << 1) & Uart.syncBit) ^ Uart.syncBit) { bitright = 0x00; - } - else { + } else { bitright = 0x01; } - if(bit != bitright) { bit = bitright; } + if (bit != bitright) { + bit = bitright; + } + - // So, now we only have to deal with *bit*, lets see... - if(Uart.posCnt == 1) { + if (Uart.posCnt == 1) { // measurement first half bitperiod - if(!bit) { + if (!bit) { // Drop in first half means that we are either seeing // an SOF or an EOF. - if(Uart.nOutOfCnt == 1) { + if (Uart.nOutOfCnt == 1) { // End of Communication Uart.state = STATE_UNSYNCD; Uart.highCnt = 0; - if(Uart.byteCnt == 0) { + if (Uart.byteCnt == 0) { // Its not straightforward to show single EOFs - // So just leave it and do not return TRUE + // So just leave it and do not return true Uart.output[0] = 0xf0; Uart.byteCnt++; + } else { + return true; } - else { - return TRUE; - } - } - else if(Uart.state != STATE_START_OF_COMMUNICATION) { + } else if (Uart.state != STATE_START_OF_COMMUNICATION) { // When not part of SOF or EOF, it is an error Uart.state = STATE_UNSYNCD; Uart.highCnt = 0; //error = 4; } } - } - else { + } else { // measurement second half bitperiod // Count the bitslot we are in... (ISO 15693) Uart.nOutOfCnt++; - - if(!bit) { - if(Uart.dropPosition) { - if(Uart.state == STATE_START_OF_COMMUNICATION) { + + if (!bit) { + if (Uart.dropPosition) { + if (Uart.state == STATE_START_OF_COMMUNICATION) { //error = 1; - } - else { + } else { //error = 7; } // It is an error if we already have seen a drop in current frame Uart.state = STATE_UNSYNCD; Uart.highCnt = 0; - } - else { + } else { Uart.dropPosition = Uart.nOutOfCnt; } } Uart.posCnt = 0; - - if(Uart.nOutOfCnt == Uart.OutOfCnt && Uart.OutOfCnt == 4) { + + if (Uart.nOutOfCnt == Uart.OutOfCnt && Uart.OutOfCnt == 4) { Uart.nOutOfCnt = 0; - - if(Uart.state == STATE_START_OF_COMMUNICATION) { - if(Uart.dropPosition == 4) { + + if (Uart.state == STATE_START_OF_COMMUNICATION) { + if (Uart.dropPosition == 4) { Uart.state = STATE_RECEIVING; Uart.OutOfCnt = 256; - } - else if(Uart.dropPosition == 3) { + } else if (Uart.dropPosition == 3) { Uart.state = STATE_RECEIVING; Uart.OutOfCnt = 4; //Uart.output[Uart.byteCnt] = 0xdd; //Uart.byteCnt++; - } - else { + } else { Uart.state = STATE_UNSYNCD; Uart.highCnt = 0; } Uart.dropPosition = 0; - } - else { + } else { // RECEIVING DATA // 1 out of 4 - if(!Uart.dropPosition) { + if (!Uart.dropPosition) { Uart.state = STATE_UNSYNCD; Uart.highCnt = 0; //error = 9; - } - else { + } else { Uart.shiftReg >>= 2; - + // Swap bit order Uart.dropPosition--; - //if(Uart.dropPosition == 1) { Uart.dropPosition = 2; } - //else if(Uart.dropPosition == 2) { Uart.dropPosition = 1; } - + //if (Uart.dropPosition == 1) { Uart.dropPosition = 2; } + //else if (Uart.dropPosition == 2) { Uart.dropPosition = 1; } + Uart.shiftReg ^= ((Uart.dropPosition & 0x03) << 6); Uart.bitCnt += 2; Uart.dropPosition = 0; - if(Uart.bitCnt == 8) { + if (Uart.bitCnt == 8) { Uart.output[Uart.byteCnt] = (Uart.shiftReg & 0xff); Uart.byteCnt++; Uart.bitCnt = 0; @@ -225,16 +226,14 @@ static RAMFUNC int OutOfNDecoding(int bit) } } } - } - else if(Uart.nOutOfCnt == Uart.OutOfCnt) { + } else if (Uart.nOutOfCnt == Uart.OutOfCnt) { // RECEIVING DATA // 1 out of 256 - if(!Uart.dropPosition) { + if (!Uart.dropPosition) { Uart.state = STATE_UNSYNCD; Uart.highCnt = 0; //error = 3; - } - else { + } else { Uart.dropPosition--; Uart.output[Uart.byteCnt] = (Uart.dropPosition & 0xff); Uart.byteCnt++; @@ -245,7 +244,7 @@ static RAMFUNC int OutOfNDecoding(int bit) } } - /*if(error) { + /*if (error) { Uart.output[Uart.byteCnt] = 0xAA; Uart.byteCnt++; Uart.output[Uart.byteCnt] = error & 0xFF; @@ -260,39 +259,37 @@ static RAMFUNC int OutOfNDecoding(int bit) Uart.byteCnt++; Uart.output[Uart.byteCnt] = 0xAA; Uart.byteCnt++; - return TRUE; + return true; }*/ } - } - else { + } else { bit = Uart.bitBuffer & 0xf0; bit >>= 4; bit ^= 0x0F; // drops become 1s ;-) - if(bit) { + if (bit) { // should have been high or at least (4 * 128) / fc // according to ISO this should be at least (9 * 128 + 20) / fc - if(Uart.highCnt == 8) { + if (Uart.highCnt == 8) { // we went low, so this could be start of communication // it turns out to be safer to choose a less significant // syncbit... so we check whether the neighbour also represents the drop Uart.posCnt = 1; // apparently we are busy with our first half bit period Uart.syncBit = bit & 8; Uart.samples = 3; - if(!Uart.syncBit) { Uart.syncBit = bit & 4; Uart.samples = 2; } - else if(bit & 4) { Uart.syncBit = bit & 4; Uart.samples = 2; bit <<= 2; } - if(!Uart.syncBit) { Uart.syncBit = bit & 2; Uart.samples = 1; } - else if(bit & 2) { Uart.syncBit = bit & 2; Uart.samples = 1; bit <<= 1; } - if(!Uart.syncBit) { Uart.syncBit = bit & 1; Uart.samples = 0; - if(Uart.syncBit && (Uart.bitBuffer & 8)) { + if (!Uart.syncBit) { Uart.syncBit = bit & 4; Uart.samples = 2; } + else if (bit & 4) { Uart.syncBit = bit & 4; Uart.samples = 2; bit <<= 2; } + if (!Uart.syncBit) { Uart.syncBit = bit & 2; Uart.samples = 1; } + else if (bit & 2) { Uart.syncBit = bit & 2; Uart.samples = 1; bit <<= 1; } + if (!Uart.syncBit) { Uart.syncBit = bit & 1; Uart.samples = 0; + if (Uart.syncBit && (Uart.bitBuffer & 8)) { Uart.syncBit = 8; // the first half bit period is expected in next sample Uart.posCnt = 0; Uart.samples = 3; } - } - else if(bit & 1) { Uart.syncBit = bit & 1; Uart.samples = 0; } + } else if (bit & 1) { Uart.syncBit = bit & 1; Uart.samples = 0; } Uart.syncBit <<= 4; Uart.state = STATE_START_OF_COMMUNICATION; @@ -303,28 +300,25 @@ static RAMFUNC int OutOfNDecoding(int bit) Uart.dropPosition = 0; Uart.shiftReg = 0; //error = 0; - } - else { + } else { Uart.highCnt = 0; } - } - else { - if(Uart.highCnt < 8) { - Uart.highCnt++; - } + } else if (Uart.highCnt < 8) { + Uart.highCnt++; } } - return FALSE; + return false; } + //============================================================================= // Manchester //============================================================================= static struct { - enum { - DEMOD_UNSYNCD, + enum { + DEMOD_UNSYNCD, DEMOD_START_OF_COMMUNICATION, DEMOD_START_OF_COMMUNICATION2, DEMOD_START_OF_COMMUNICATION3, @@ -334,29 +328,28 @@ static struct { DEMOD_END_OF_COMMUNICATION, DEMOD_END_OF_COMMUNICATION2, DEMOD_MANCHESTER_F, - DEMOD_ERROR_WAIT - } state; - int bitCount; - int posCount; - int syncBit; - uint16_t shiftReg; - int buffer; - int buffer2; - int buffer3; - int buff; - int samples; - int len; + DEMOD_ERROR_WAIT + } state; + int bitCount; + int posCount; + int syncBit; + uint16_t shiftReg; + int buffer; + int buffer2; + int buffer3; + int buff; + int samples; + int len; enum { SUB_NONE, SUB_FIRST_HALF, SUB_SECOND_HALF, SUB_BOTH - } sub; - uint8_t *output; + } sub; + uint8_t *output; } Demod; -static RAMFUNC int ManchesterDecoding(int v) -{ +static RAMFUNC int ManchesterDecoding(int v) { int bit; int modulation; int error = 0; @@ -366,62 +359,60 @@ static RAMFUNC int ManchesterDecoding(int v) Demod.buffer2 = Demod.buffer3; Demod.buffer3 = v; - if(Demod.buff < 3) { + if (Demod.buff < 3) { Demod.buff++; - return FALSE; + return false; } - if(Demod.state==DEMOD_UNSYNCD) { + if (Demod.state==DEMOD_UNSYNCD) { Demod.output[Demod.len] = 0xfa; Demod.syncBit = 0; //Demod.samples = 0; - Demod.posCount = 1; // This is the first half bit period, so after syncing handle the second part + Demod.posCount = 1; // This is the first half bit period, so after syncing handle the second part - if(bit & 0x08) { + if (bit & 0x08) { Demod.syncBit = 0x08; } - if(bit & 0x04) { - if(Demod.syncBit) { + if (bit & 0x04) { + if (Demod.syncBit) { bit <<= 4; } Demod.syncBit = 0x04; } - if(bit & 0x02) { - if(Demod.syncBit) { + if (bit & 0x02) { + if (Demod.syncBit) { bit <<= 2; } Demod.syncBit = 0x02; } - if(bit & 0x01 && Demod.syncBit) { + if (bit & 0x01 && Demod.syncBit) { Demod.syncBit = 0x01; } - - if(Demod.syncBit) { + + if (Demod.syncBit) { Demod.len = 0; Demod.state = DEMOD_START_OF_COMMUNICATION; Demod.sub = SUB_FIRST_HALF; Demod.bitCount = 0; Demod.shiftReg = 0; Demod.samples = 0; - if(Demod.posCount) { - //if(trigger) LED_A_OFF(); // Not useful in this case... - switch(Demod.syncBit) { + if (Demod.posCount) { + switch (Demod.syncBit) { case 0x08: Demod.samples = 3; break; case 0x04: Demod.samples = 2; break; case 0x02: Demod.samples = 1; break; case 0x01: Demod.samples = 0; break; } // SOF must be long burst... otherwise stay unsynced!!! - if(!(Demod.buffer & Demod.syncBit) || !(Demod.buffer2 & Demod.syncBit)) { + if (!(Demod.buffer & Demod.syncBit) || !(Demod.buffer2 & Demod.syncBit)) { Demod.state = DEMOD_UNSYNCD; } - } - else { + } else { // SOF must be long burst... otherwise stay unsynced!!! - if(!(Demod.buffer2 & Demod.syncBit) || !(Demod.buffer3 & Demod.syncBit)) { + if (!(Demod.buffer2 & Demod.syncBit) || !(Demod.buffer3 & Demod.syncBit)) { Demod.state = DEMOD_UNSYNCD; error = 0x88; } @@ -430,91 +421,65 @@ static RAMFUNC int ManchesterDecoding(int v) error = 0; } - } - else { + } else { + // state is DEMOD is in SYNC from here on. modulation = bit & Demod.syncBit; modulation |= ((bit << 1) ^ ((Demod.buffer & 0x08) >> 3)) & Demod.syncBit; Demod.samples += 4; - if(Demod.posCount==0) { + if (Demod.posCount == 0) { Demod.posCount = 1; - if(modulation) { + if (modulation) { Demod.sub = SUB_FIRST_HALF; - } - else { + } else { Demod.sub = SUB_NONE; } - } - else { + } else { Demod.posCount = 0; - /*(modulation && (Demod.sub == SUB_FIRST_HALF)) { - if(Demod.state!=DEMOD_ERROR_WAIT) { - Demod.state = DEMOD_ERROR_WAIT; - Demod.output[Demod.len] = 0xaa; - error = 0x01; - } - }*/ - //else if(modulation) { - if(modulation) { - if(Demod.sub == SUB_FIRST_HALF) { + if (modulation) { + if (Demod.sub == SUB_FIRST_HALF) { Demod.sub = SUB_BOTH; - } - else { + } else { Demod.sub = SUB_SECOND_HALF; } - } - else if(Demod.sub == SUB_NONE) { - if(Demod.state == DEMOD_SOF_COMPLETE) { + } else if (Demod.sub == SUB_NONE) { + if (Demod.state == DEMOD_SOF_COMPLETE) { Demod.output[Demod.len] = 0x0f; Demod.len++; Demod.state = DEMOD_UNSYNCD; -// error = 0x0f; - return TRUE; - } - else { + return true; + } else { Demod.state = DEMOD_ERROR_WAIT; error = 0x33; } - /*if(Demod.state!=DEMOD_ERROR_WAIT) { - Demod.state = DEMOD_ERROR_WAIT; - Demod.output[Demod.len] = 0xaa; - error = 0x01; - }*/ } switch(Demod.state) { case DEMOD_START_OF_COMMUNICATION: - if(Demod.sub == SUB_BOTH) { - //Demod.state = DEMOD_MANCHESTER_D; + if (Demod.sub == SUB_BOTH) { Demod.state = DEMOD_START_OF_COMMUNICATION2; Demod.posCount = 1; Demod.sub = SUB_NONE; - } - else { + } else { Demod.output[Demod.len] = 0xab; Demod.state = DEMOD_ERROR_WAIT; error = 0xd2; } break; case DEMOD_START_OF_COMMUNICATION2: - if(Demod.sub == SUB_SECOND_HALF) { + if (Demod.sub == SUB_SECOND_HALF) { Demod.state = DEMOD_START_OF_COMMUNICATION3; - } - else { + } else { Demod.output[Demod.len] = 0xab; Demod.state = DEMOD_ERROR_WAIT; error = 0xd3; } break; case DEMOD_START_OF_COMMUNICATION3: - if(Demod.sub == SUB_SECOND_HALF) { -// Demod.state = DEMOD_MANCHESTER_D; + if (Demod.sub == SUB_SECOND_HALF) { Demod.state = DEMOD_SOF_COMPLETE; - //Demod.output[Demod.len] = Demod.syncBit & 0xFF; - //Demod.len++; - } - else { + } else { Demod.output[Demod.len] = 0xab; Demod.state = DEMOD_ERROR_WAIT; error = 0xd4; @@ -525,20 +490,17 @@ static RAMFUNC int ManchesterDecoding(int v) case DEMOD_MANCHESTER_E: // OPPOSITE FROM ISO14443 - 11110000 = 0 (1 in 14443) // 00001111 = 1 (0 in 14443) - if(Demod.sub == SUB_SECOND_HALF) { // SUB_FIRST_HALF + if (Demod.sub == SUB_SECOND_HALF) { // SUB_FIRST_HALF Demod.bitCount++; Demod.shiftReg = (Demod.shiftReg >> 1) ^ 0x100; Demod.state = DEMOD_MANCHESTER_D; - } - else if(Demod.sub == SUB_FIRST_HALF) { // SUB_SECOND_HALF + } else if (Demod.sub == SUB_FIRST_HALF) { // SUB_SECOND_HALF Demod.bitCount++; Demod.shiftReg >>= 1; Demod.state = DEMOD_MANCHESTER_E; - } - else if(Demod.sub == SUB_BOTH) { + } else if (Demod.sub == SUB_BOTH) { Demod.state = DEMOD_MANCHESTER_F; - } - else { + } else { Demod.state = DEMOD_ERROR_WAIT; error = 0x55; } @@ -546,17 +508,16 @@ static RAMFUNC int ManchesterDecoding(int v) case DEMOD_MANCHESTER_F: // 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); // right align data + 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); // right align data Demod.output[Demod.len] = Demod.shiftReg & 0xff; Demod.len++; } Demod.state = DEMOD_UNSYNCD; - return TRUE; - } - else { + return true; + } else { Demod.output[Demod.len] = 0xad; Demod.state = DEMOD_ERROR_WAIT; error = 0x03; @@ -573,17 +534,7 @@ static RAMFUNC int ManchesterDecoding(int v) break; } - /*if(Demod.bitCount>=9) { - Demod.output[Demod.len] = Demod.shiftReg & 0xff; - Demod.len++; - - Demod.parityBits <<= 1; - Demod.parityBits ^= ((Demod.shiftReg >> 8) & 0x01); - - Demod.bitCount = 0; - Demod.shiftReg = 0; - }*/ - if(Demod.bitCount>=8) { + if (Demod.bitCount >= 8) { Demod.shiftReg >>= 1; Demod.output[Demod.len] = (Demod.shiftReg & 0xff); Demod.len++; @@ -591,7 +542,7 @@ static RAMFUNC int ManchesterDecoding(int v) Demod.shiftReg = 0; } - if(error) { + if (error) { Demod.output[Demod.len] = 0xBB; Demod.len++; Demod.output[Demod.len] = error & 0xFF; @@ -609,14 +560,14 @@ static RAMFUNC int ManchesterDecoding(int v) Demod.len++; Demod.output[Demod.len] = 0xBB; Demod.len++; - return TRUE; + return true; } } } // end (state != UNSYNCED) - return FALSE; + return false; } //============================================================================= @@ -629,451 +580,282 @@ static RAMFUNC int ManchesterDecoding(int v) // triggering so that we start recording at the point that the tag is moved // near the reader. //----------------------------------------------------------------------------- -void RAMFUNC SnoopIClass(void) -{ +void RAMFUNC SnoopIClass(void) { + // We won't start recording the frames that we acquire until we trigger; + // a good trigger condition to get started is probably when we see a + // response from the tag. + //int triggered = false; // false to wait first for card - // We won't start recording the frames that we acquire until we trigger; - // a good trigger condition to get started is probably when we see a - // response from the tag. - //int triggered = FALSE; // FALSE to wait first for card - - // The command (reader -> tag) that we're receiving. + // The command (reader -> tag) that we're receiving. // The length of a received command will in most cases be no more than 18 bytes. // So 32 should be enough! #define ICLASS_BUFFER_SIZE 32 uint8_t readerToTagCmd[ICLASS_BUFFER_SIZE]; - // The response (tag -> reader) that we're receiving. + // The response (tag -> reader) that we're receiving. uint8_t tagToReaderResponse[ICLASS_BUFFER_SIZE]; - - FpgaDownloadAndGo(FPGA_BITSTREAM_HF); - - // free all BigBuf memory + + FpgaDownloadAndGo(FPGA_BITSTREAM_HF); + + // free all BigBuf memory BigBuf_free(); - // The DMA buffer, used to stream samples from the FPGA - uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE); - - set_tracing(TRUE); + // The DMA buffer, used to stream samples from the FPGA + uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE); + + set_tracing(true); clear_trace(); - iso14a_set_trigger(FALSE); + iso14a_set_trigger(false); int lastRxCounter; - uint8_t *upTo; - int smpl; - int maxBehindBy = 0; + uint8_t *upTo; + int smpl; + int maxBehindBy = 0; - // Count of samples received so far, so that we can include timing - // information in the trace buffer. - int samples = 0; - rsamples = 0; + // Count of samples received so far, so that we can include timing + // information in the trace buffer. + int samples = 0; + rsamples = 0; - // Set up the demodulator for tag -> reader responses. + // Set up the demodulator for tag -> reader responses. Demod.output = tagToReaderResponse; - Demod.len = 0; - Demod.state = DEMOD_UNSYNCD; + Demod.len = 0; + Demod.state = DEMOD_UNSYNCD; - // Setup for the DMA. - FpgaSetupSsc(); - upTo = dmaBuf; - lastRxCounter = DMA_BUFFER_SIZE; - FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE); + // Setup for the DMA. + FpgaSetupSsc(FPGA_MAJOR_MODE_HF_ISO14443A); + upTo = dmaBuf; + lastRxCounter = DMA_BUFFER_SIZE; + FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE); - // And the reader -> tag commands - memset(&Uart, 0, sizeof(Uart)); + // And the reader -> tag commands + memset(&Uart, 0, sizeof(Uart)); Uart.output = readerToTagCmd; - Uart.byteCntMax = 32; // was 100 (greg)//////////////////////////////////////////////////////////////////////// - Uart.state = STATE_UNSYNCD; + Uart.byteCntMax = 32; // was 100 (greg)//////////////////////////////////////////////////////////////////////// + Uart.state = STATE_UNSYNCD; - // And put the FPGA in the appropriate mode - // Signal field is off with the appropriate LED - LED_D_OFF(); - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_SNIFFER); - SetAdcMuxFor(GPIO_MUXSEL_HIPKD); + // And put the FPGA in the appropriate mode + // Signal field is off with the appropriate LED + LED_D_OFF(); + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_SNIFFER); + SetAdcMuxFor(GPIO_MUXSEL_HIPKD); uint32_t time_0 = GetCountSspClk(); uint32_t time_start = 0; uint32_t time_stop = 0; - int div = 0; - //int div2 = 0; - int decbyte = 0; - int decbyter = 0; - - // And now we loop, receiving samples. - for(;;) { - LED_A_ON(); - WDT_HIT(); - int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) & - (DMA_BUFFER_SIZE-1); - if(behindBy > maxBehindBy) { - maxBehindBy = behindBy; - if(behindBy > (9 * DMA_BUFFER_SIZE / 10)) { - Dbprintf("blew circular buffer! behindBy=0x%x", behindBy); - goto done; - } - } - if(behindBy < 1) continue; + int div = 0; + //int div2 = 0; + int decbyte = 0; + int decbyter = 0; - LED_A_OFF(); - smpl = upTo[0]; - upTo++; - lastRxCounter -= 1; - if(upTo - dmaBuf > DMA_BUFFER_SIZE) { - upTo -= DMA_BUFFER_SIZE; - lastRxCounter += DMA_BUFFER_SIZE; - AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) upTo; - AT91C_BASE_PDC_SSC->PDC_RNCR = DMA_BUFFER_SIZE; - } - - //samples += 4; - samples += 1; - - if(smpl & 0xF) { - decbyte ^= (1 << (3 - div)); - } - - // FOR READER SIDE COMMUMICATION... - - decbyter <<= 2; - decbyter ^= (smpl & 0x30); - - div++; - - if((div + 1) % 2 == 0) { - smpl = decbyter; - if(OutOfNDecoding((smpl & 0xF0) >> 4)) { - rsamples = samples - Uart.samples; - time_stop = (GetCountSspClk()-time_0) << 4; - LED_C_ON(); - - //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) { - uint8_t parity[MAX_PARITY_SIZE]; - GetParity(Uart.output, Uart.byteCnt, parity); - LogTrace(Uart.output,Uart.byteCnt, time_start, time_stop, parity, TRUE); + // And now we loop, receiving samples. + for (;;) { + LED_A_ON(); + WDT_HIT(); + int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) & (DMA_BUFFER_SIZE-1); + if (behindBy > maxBehindBy) { + maxBehindBy = behindBy; + if (behindBy > (9 * DMA_BUFFER_SIZE / 10)) { + Dbprintf("blew circular buffer! behindBy=0x%x", behindBy); + goto done; } + } + if (behindBy < 1) continue; + + LED_A_OFF(); + smpl = upTo[0]; + upTo++; + lastRxCounter -= 1; + if (upTo - dmaBuf > DMA_BUFFER_SIZE) { + upTo -= DMA_BUFFER_SIZE; + lastRxCounter += DMA_BUFFER_SIZE; + AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) upTo; + AT91C_BASE_PDC_SSC->PDC_RNCR = DMA_BUFFER_SIZE; + } + //samples += 4; + samples += 1; - /* And ready to receive another command. */ - Uart.state = STATE_UNSYNCD; - /* And also reset the demod code, which might have been */ - /* false-triggered by the commands from the reader. */ - Demod.state = DEMOD_UNSYNCD; - LED_B_OFF(); - Uart.byteCnt = 0; - }else{ - time_start = (GetCountSspClk()-time_0) << 4; + if (smpl & 0xF) { + decbyte ^= (1 << (3 - div)); } - decbyter = 0; - } - if(div > 3) { - smpl = decbyte; - if(ManchesterDecoding(smpl & 0x0F)) { - time_stop = (GetCountSspClk()-time_0) << 4; + // FOR READER SIDE COMMUMICATION... + + decbyter <<= 2; + decbyter ^= (smpl & 0x30); + + div++; - rsamples = samples - Demod.samples; - LED_B_ON(); + if ((div + 1) % 2 == 0) { + smpl = decbyter; + if (OutOfNDecoding((smpl & 0xF0) >> 4)) { + rsamples = samples - Uart.samples; + time_stop = (GetCountSspClk()-time_0) << 4; + LED_C_ON(); + + //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; + uint8_t parity[MAX_PARITY_SIZE]; + GetParity(Uart.output, Uart.byteCnt, parity); + LogTrace(Uart.output, Uart.byteCnt, time_start, time_stop, parity, true); + + /* And ready to receive another command. */ + Uart.state = STATE_UNSYNCD; + /* And also reset the demod code, which might have been */ + /* false-triggered by the commands from the reader. */ + Demod.state = DEMOD_UNSYNCD; + LED_B_OFF(); + Uart.byteCnt = 0; + } else { + time_start = (GetCountSspClk()-time_0) << 4; + } + decbyter = 0; + } + + if (div > 3) { + smpl = decbyte; + if (ManchesterDecoding(smpl & 0x0F)) { + time_stop = (GetCountSspClk()-time_0) << 4; + + rsamples = samples - Demod.samples; + LED_B_ON(); - if(tracing) { uint8_t parity[MAX_PARITY_SIZE]; GetParity(Demod.output, Demod.len, parity); - LogTrace(Demod.output, Demod.len, time_start, time_stop, parity, FALSE); + LogTrace(Demod.output, Demod.len, time_start, time_stop, parity, false); + + // And ready to receive another response. + memset(&Demod, 0, sizeof(Demod)); + Demod.output = tagToReaderResponse; + Demod.state = DEMOD_UNSYNCD; + LED_C_OFF(); + } else { + time_start = (GetCountSspClk()-time_0) << 4; } - // And ready to receive another response. - memset(&Demod, 0, sizeof(Demod)); - Demod.output = tagToReaderResponse; - Demod.state = DEMOD_UNSYNCD; - LED_C_OFF(); - }else{ - time_start = (GetCountSspClk()-time_0) << 4; + div = 0; + decbyte = 0x00; } - - div = 0; - decbyte = 0x00; - } - //} - if(BUTTON_PRESS()) { - DbpString("cancelled_a"); - goto done; - } - } + if (BUTTON_PRESS()) { + DbpString("cancelled_a"); + goto done; + } + } - DbpString("COMMAND FINISHED"); + DbpString("COMMAND FINISHED"); - Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt); + Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt); Dbprintf("%x %x %x", Uart.byteCntMax, BigBuf_get_traceLen(), (int)Uart.output[0]); done: - AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS; - Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt); + AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS; + Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt); Dbprintf("%x %x %x", Uart.byteCntMax, BigBuf_get_traceLen(), (int)Uart.output[0]); - LED_A_OFF(); - LED_B_OFF(); - LED_C_OFF(); - LED_D_OFF(); + LEDsoff(); } void rotateCSN(uint8_t* originalCSN, uint8_t* rotatedCSN) { - int i; - for(i = 0; i < 8; i++) { + int i; + for (i = 0; i < 8; i++) { rotatedCSN[i] = (originalCSN[i] >> 3) | (originalCSN[(i+1)%8] << 5); } } -//----------------------------------------------------------------------------- -// Wait for commands from reader -// Stop when button is pressed -// Or return TRUE when command is captured -//----------------------------------------------------------------------------- -static int GetIClassCommandFromReader(uint8_t *received, int *len, int maxLen) -{ - // Set FPGA mode to "simulated ISO 14443 tag", no modulation (listen - // only, since we are receiving, not transmitting). - // Signal field is off with the appropriate LED - LED_D_OFF(); - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN); - - // Now run a `software UART' on the stream of incoming samples. - Uart.output = received; - Uart.byteCntMax = maxLen; - Uart.state = STATE_UNSYNCD; - - for(;;) { - WDT_HIT(); - - if(BUTTON_PRESS()) return FALSE; - - if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { - AT91C_BASE_SSC->SSC_THR = 0x00; - } - if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { - uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; - - if(OutOfNDecoding(b & 0x0f)) { - *len = Uart.byteCnt; - return TRUE; - } - } - } -} - -static uint8_t encode4Bits(const uint8_t b) -{ - uint8_t c = b & 0xF; - // OTA, the least significant bits first - // The columns are - // 1 - Bit value to send - // 2 - Reversed (big-endian) - // 3 - Encoded - // 4 - Hex values - - switch(c){ - // 1 2 3 4 - case 15: return 0x55; // 1111 -> 1111 -> 01010101 -> 0x55 - case 14: return 0x95; // 1110 -> 0111 -> 10010101 -> 0x95 - case 13: return 0x65; // 1101 -> 1011 -> 01100101 -> 0x65 - case 12: return 0xa5; // 1100 -> 0011 -> 10100101 -> 0xa5 - case 11: return 0x59; // 1011 -> 1101 -> 01011001 -> 0x59 - case 10: return 0x99; // 1010 -> 0101 -> 10011001 -> 0x99 - case 9: return 0x69; // 1001 -> 1001 -> 01101001 -> 0x69 - case 8: return 0xa9; // 1000 -> 0001 -> 10101001 -> 0xa9 - case 7: return 0x56; // 0111 -> 1110 -> 01010110 -> 0x56 - case 6: return 0x96; // 0110 -> 0110 -> 10010110 -> 0x96 - case 5: return 0x66; // 0101 -> 1010 -> 01100110 -> 0x66 - case 4: return 0xa6; // 0100 -> 0010 -> 10100110 -> 0xa6 - case 3: return 0x5a; // 0011 -> 1100 -> 01011010 -> 0x5a - case 2: return 0x9a; // 0010 -> 0100 -> 10011010 -> 0x9a - case 1: return 0x6a; // 0001 -> 1000 -> 01101010 -> 0x6a - default: return 0xaa; // 0000 -> 0000 -> 10101010 -> 0xaa - - } -} - -//----------------------------------------------------------------------------- -// Prepare tag messages -//----------------------------------------------------------------------------- -static void CodeIClassTagAnswer(const uint8_t *cmd, int len) -{ - - /* - * SOF comprises 3 parts; - * * An unmodulated time of 56.64 us - * * 24 pulses of 423.75 KHz (fc/32) - * * A logic 1, which starts with an unmodulated time of 18.88us - * followed by 8 pulses of 423.75kHz (fc/32) - * - * - * EOF comprises 3 parts: - * - A logic 0 (which starts with 8 pulses of fc/32 followed by an unmodulated - * time of 18.88us. - * - 24 pulses of fc/32 - * - An unmodulated time of 56.64 us - * - * - * A logic 0 starts with 8 pulses of fc/32 - * followed by an unmodulated time of 256/fc (~18,88us). - * - * A logic 0 starts with unmodulated time of 256/fc (~18,88us) followed by - * 8 pulses of fc/32 (also 18.88us) - * - * The mode FPGA_HF_SIMULATOR_MODULATE_424K_8BIT which we use to simulate tag, - * works like this. - * - A 1-bit input to the FPGA becomes 8 pulses on 423.5kHz (fc/32) (18.88us). - * - A 0-bit inptu to the FPGA becomes an unmodulated time of 18.88us - * - * In this mode the SOF can be written as 00011101 = 0x1D - * The EOF can be written as 10111000 = 0xb8 - * A logic 1 is 01 - * A logic 0 is 10 - * - * */ - - int i; - +// Encode SOF only +static void CodeIClassTagSOF() { ToSendReset(); - - // Send SOF ToSend[++ToSendMax] = 0x1D; - - for(i = 0; i < len; i++) { - uint8_t b = cmd[i]; - ToSend[++ToSendMax] = encode4Bits(b & 0xF); //Least significant half - ToSend[++ToSendMax] = encode4Bits((b >>4) & 0xF);//Most significant half - } - - // Send EOF - ToSend[++ToSendMax] = 0xB8; - //lastProxToAirDuration = 8*ToSendMax - 3*8 - 3*8;//Not counting zeroes in the beginning or end - // Convert from last byte pos to length ToSendMax++; } -// Only SOF -static void CodeIClassTagSOF() -{ - //So far a dummy implementation, not used - //int lastProxToAirDuration =0; - - ToSendReset(); - // Send SOF - ToSend[++ToSendMax] = 0x1D; -// lastProxToAirDuration = 8*ToSendMax - 3*8;//Not counting zeroes in the beginning - - // Convert from last byte pos to length - ToSendMax++; +static void AppendCrc(uint8_t *data, int len) { + ComputeCrc14443(CRC_ICLASS, data, len, data+len, data+len+1); } -#define MODE_SIM_CSN 0 -#define MODE_EXIT_AFTER_MAC 1 -#define MODE_FULLSIM 2 -int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf); -/** - * @brief SimulateIClass simulates an iClass card. - * @param arg0 type of simulation - * - 0 uses the first 8 bytes in usb data as CSN - * - 2 "dismantling iclass"-attack. This mode iterates through all CSN's specified - * in the usb data. This mode collects MAC from the reader, in order to do an offline - * attack on the keys. For more info, see "dismantling iclass" and proxclone.com. - * - Other : Uses the default CSN (031fec8af7ff12e0) - * @param arg1 - number of CSN's contained in datain (applicable for mode 2 only) - * @param arg2 - * @param datain - */ -void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain) -{ - uint32_t simType = arg0; - uint32_t numberOfCSNS = arg1; - FpgaDownloadAndGo(FPGA_BITSTREAM_HF); - - // Enable and clear the trace - set_tracing(TRUE); - clear_trace(); - //Use the emulator memory for SIM - uint8_t *emulator = BigBuf_get_EM_addr(); - - if(simType == 0) { - // Use the CSN from commandline - memcpy(emulator, datain, 8); - doIClassSimulation(MODE_SIM_CSN,NULL); - }else if(simType == 1) - { - //Default CSN - uint8_t csn_crc[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 0x00, 0x00 }; - // Use the CSN from commandline - memcpy(emulator, csn_crc, 8); - doIClassSimulation(MODE_SIM_CSN,NULL); - } - else if(simType == 2) - { - - uint8_t mac_responses[USB_CMD_DATA_SIZE] = { 0 }; - 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. - int i = 0; - for( ; i < numberOfCSNS && i*8+8 < USB_CMD_DATA_SIZE; i++) - { - // The usb data is 512 bytes, fitting 65 8-byte CSNs in there. - - memcpy(emulator, datain+(i*8), 8); - if(doIClassSimulation(MODE_EXIT_AFTER_MAC,mac_responses+i*8)) - { - cmd_send(CMD_ACK,CMD_SIMULATE_TAG_ICLASS,i,0,mac_responses,i*8); - return; // Button pressed - } - } - cmd_send(CMD_ACK,CMD_SIMULATE_TAG_ICLASS,i,0,mac_responses,i*8); - - }else if(simType == 3){ - //This is 'full sim' mode, where we use the emulator storage for data. - doIClassSimulation(MODE_FULLSIM, NULL); - } - else{ - // We may want a mode here where we hardcode the csns to use (from proxclone). - // That will speed things up a little, but not required just yet. - Dbprintf("The mode is not implemented, reserved for future use"); - } - Dbprintf("Done..."); - -} /** * @brief Does the actual simulation - * @param csn - csn to use - * @param breakAfterMacReceived if true, returns after reader MAC has been received. */ -int doIClassSimulation( int simulationMode, uint8_t *reader_mac_buf) -{ +int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { + // free eventually allocated BigBuf memory BigBuf_free_keep_EM(); - uint8_t *csn = BigBuf_get_EM_addr(); - uint8_t *emulator = csn; - uint8_t sof_data[] = { 0x0F} ; + uint16_t page_size = 32 * 8; + uint8_t current_page = 0; + + // maintain cipher states for both credit and debit key for each page + State cipher_state_KC[8]; + State cipher_state_KD[8]; + State *cipher_state = &cipher_state_KD[0]; + + uint8_t *emulator = BigBuf_get_EM_addr(); + uint8_t *csn = emulator; + // CSN followed by two CRC bytes - uint8_t anticoll_data[10] = { 0 }; - uint8_t csn_data[10] = { 0 }; - memcpy(csn_data,csn,sizeof(csn_data)); - Dbprintf("Simulating 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]); + uint8_t anticoll_data[10]; + uint8_t csn_data[10]; + memcpy(csn_data, csn, sizeof(csn_data)); + Dbprintf("Simulating 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]); // Construct anticollision-CSN - rotateCSN(csn_data,anticoll_data); + rotateCSN(csn_data, anticoll_data); // Compute CRC on both CSNs - ComputeCrc14443(CRC_ICLASS, anticoll_data, 8, &anticoll_data[8], &anticoll_data[9]); - ComputeCrc14443(CRC_ICLASS, csn_data, 8, &csn_data[8], &csn_data[9]); + AppendCrc(anticoll_data, 8); + AppendCrc(csn_data, 8); + + uint8_t diversified_key_d[8] = { 0x00 }; + uint8_t diversified_key_c[8] = { 0x00 }; + uint8_t *diversified_key = diversified_key_d; + + // configuration block + uint8_t conf_block[10] = {0x12, 0xFF, 0xFF, 0xFF, 0x7F, 0x1F, 0xFF, 0x3C, 0x00, 0x00}; // e-Purse - uint8_t card_challenge_data[8] = { 0x00 }; - if(simulationMode == MODE_FULLSIM) - { - //Card challenge, a.k.a e-purse is on block 2 - memcpy(card_challenge_data,emulator + (8 * 2) , 8); + uint8_t card_challenge_data[8] = { 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; + + if (simulationMode == ICLASS_SIM_MODE_FULL) { + // initialize from page 0 + memcpy(conf_block, emulator + 8 * 1, 8); + memcpy(card_challenge_data, emulator + 8 * 2, 8); // e-purse + memcpy(diversified_key_d, emulator + 8 * 3, 8); // Kd + memcpy(diversified_key_c, emulator + 8 * 4, 8); // Kc + } + + AppendCrc(conf_block, 8); + + // save card challenge for sim2,4 attack + if (reader_mac_buf != NULL) { + memcpy(reader_mac_buf, card_challenge_data, 8); + } + + if (conf_block[5] & 0x80) { + page_size = 256 * 8; + } + + // From PicoPass DS: + // When the page is in personalization mode this bit is equal to 1. + // Once the application issuer has personalized and coded its dedicated areas, this bit must be set to 0: + // the page is then "in application mode". + bool personalization_mode = conf_block[7] & 0x80; + + // chip memory may be divided in 8 pages + uint8_t max_page = conf_block[4] & 0x10 ? 0 : 7; + + // Precalculate the cipher states, feeding it the CC + cipher_state_KD[0] = opt_doTagMAC_1(card_challenge_data, diversified_key_d); + cipher_state_KC[0] = opt_doTagMAC_1(card_challenge_data, diversified_key_c); + if (simulationMode == ICLASS_SIM_MODE_FULL) { + for (int i = 1; i < max_page; i++) { + uint8_t *epurse = emulator + i*page_size + 8*2; + uint8_t *Kd = emulator + i*page_size + 8*3; + uint8_t *Kc = emulator + i*page_size + 8*4; + cipher_state_KD[i] = opt_doTagMAC_1(epurse, Kd); + cipher_state_KC[i] = opt_doTagMAC_1(epurse, Kc); + } } int exitLoop = 0; @@ -1085,405 +867,588 @@ int doIClassSimulation( int simulationMode, uint8_t *reader_mac_buf) // Tag CSN uint8_t *modulated_response; - int modulated_response_size; - uint8_t* trace_data = NULL; + int modulated_response_size = 0; + uint8_t *trace_data = NULL; int trace_data_size = 0; - // Respond SOF -- takes 1 bytes - uint8_t *resp_sof = BigBuf_malloc(2); + uint8_t *resp_sof = BigBuf_malloc(1); int resp_sof_Len; // Anticollision CSN (rotated CSN) // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte) - uint8_t *resp_anticoll = BigBuf_malloc(28); + uint8_t *resp_anticoll = BigBuf_malloc(22); int resp_anticoll_len; - // CSN + // CSN (block 0) // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte) - uint8_t *resp_csn = BigBuf_malloc(30); + uint8_t *resp_csn = BigBuf_malloc(22); int resp_csn_len; - // e-Purse + // configuration (block 1) picopass 2ks + uint8_t *resp_conf = BigBuf_malloc(22); + int resp_conf_len; + + // e-Purse (block 2) // 18: Takes 2 bytes for SOF/EOF and 8 * 2 = 16 bytes (2 bytes/bit) - uint8_t *resp_cc = BigBuf_malloc(20); + uint8_t *resp_cc = BigBuf_malloc(18); int resp_cc_len; + // Kd, Kc (blocks 3 and 4). Cannot be read. Always respond with 0xff bytes only + uint8_t *resp_ff = BigBuf_malloc(22); + int resp_ff_len; + uint8_t ff_data[10] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00}; + AppendCrc(ff_data, 8); + + // Application Issuer Area (block 5) + uint8_t *resp_aia = BigBuf_malloc(22); + int resp_aia_len; + uint8_t aia_data[10] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00}; + AppendCrc(aia_data, 8); + uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE); - memset(receivedCmd, 0x44, MAX_FRAME_SIZE); int len; // Prepare card messages - ToSendMax = 0; - // First card answer: SOF + // First card answer: SOF only CodeIClassTagSOF(); - memcpy(resp_sof, ToSend, ToSendMax); resp_sof_Len = ToSendMax; + memcpy(resp_sof, ToSend, ToSendMax); + resp_sof_Len = ToSendMax; // Anticollision CSN - CodeIClassTagAnswer(anticoll_data, sizeof(anticoll_data)); - memcpy(resp_anticoll, ToSend, ToSendMax); resp_anticoll_len = ToSendMax; + CodeIso15693AsTag(anticoll_data, sizeof(anticoll_data)); + memcpy(resp_anticoll, ToSend, ToSendMax); + resp_anticoll_len = ToSendMax; + + // CSN (block 0) + CodeIso15693AsTag(csn_data, sizeof(csn_data)); + memcpy(resp_csn, ToSend, ToSendMax); + resp_csn_len = ToSendMax; + + // Configuration (block 1) + CodeIso15693AsTag(conf_block, sizeof(conf_block)); + memcpy(resp_conf, ToSend, ToSendMax); + resp_conf_len = ToSendMax; + + // e-Purse (block 2) + CodeIso15693AsTag(card_challenge_data, sizeof(card_challenge_data)); + memcpy(resp_cc, ToSend, ToSendMax); + resp_cc_len = ToSendMax; + + // Kd, Kc (blocks 3 and 4) + CodeIso15693AsTag(ff_data, sizeof(ff_data)); + memcpy(resp_ff, ToSend, ToSendMax); + resp_ff_len = ToSendMax; + + // Application Issuer Area (block 5) + CodeIso15693AsTag(aia_data, sizeof(aia_data)); + memcpy(resp_aia, ToSend, ToSendMax); + resp_aia_len = ToSendMax; + + //This is used for responding to READ-block commands or other data which is dynamically generated + uint8_t *data_generic_trace = BigBuf_malloc(32 + 2); // 32 bytes data + 2byte CRC is max tag answer + uint8_t *data_response = BigBuf_malloc( (32 + 2) * 2 + 2); - // CSN - CodeIClassTagAnswer(csn_data, sizeof(csn_data)); - memcpy(resp_csn, ToSend, ToSendMax); resp_csn_len = ToSendMax; + bool buttonPressed = false; + enum { IDLE, ACTIVATED, SELECTED, HALTED } chip_state = IDLE; - // e-Purse - CodeIClassTagAnswer(card_challenge_data, sizeof(card_challenge_data)); - memcpy(resp_cc, ToSend, ToSendMax); resp_cc_len = ToSendMax; + while (!exitLoop) { + WDT_HIT(); - //This is used for responding to READ-block commands - uint8_t *data_response = BigBuf_malloc(8 * 2 + 2); + uint32_t reader_eof_time = 0; + len = GetIso15693CommandFromReader(receivedCmd, MAX_FRAME_SIZE, &reader_eof_time); + if (len < 0) { + buttonPressed = true; + break; + } - // Start from off (no field generated) - //FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); - //SpinDelay(200); - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN); - SpinDelay(100); - StartCountSspClk(); - // We need to listen to the high-frequency, peak-detected path. - SetAdcMuxFor(GPIO_MUXSEL_HIPKD); - FpgaSetupSsc(); + // Now look at the reader command and provide appropriate responses + // default is no response: + modulated_response = NULL; + modulated_response_size = 0; + trace_data = NULL; + trace_data_size = 0; + + if (receivedCmd[0] == ICLASS_CMD_ACTALL && len == 1) { + // Reader in anticollision phase + if (chip_state != HALTED) { + modulated_response = resp_sof; + modulated_response_size = resp_sof_Len; + chip_state = ACTIVATED; + } - // To control where we are in the protocol - int cmdsRecvd = 0; - uint32_t time_0 = GetCountSspClk(); - uint32_t t2r_time =0; - uint32_t r2t_time =0; + } else if (receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 1) { // identify + // Reader asks for anticollision CSN + if (chip_state == SELECTED || chip_state == ACTIVATED) { + modulated_response = resp_anticoll; + modulated_response_size = resp_anticoll_len; + trace_data = anticoll_data; + trace_data_size = sizeof(anticoll_data); + } - LED_A_ON(); - bool buttonPressed = false; + } else if (receivedCmd[0] == ICLASS_CMD_SELECT && len == 9) { + // Reader selects anticollision CSN. + // Tag sends the corresponding real CSN + if (chip_state == ACTIVATED || chip_state == SELECTED) { + if (!memcmp(receivedCmd+1, anticoll_data, 8)) { + modulated_response = resp_csn; + modulated_response_size = resp_csn_len; + trace_data = csn_data; + trace_data_size = sizeof(csn_data); + chip_state = SELECTED; + } else { + chip_state = IDLE; + } + } else if (chip_state == HALTED) { + // RESELECT with CSN + if (!memcmp(receivedCmd+1, csn_data, 8)) { + modulated_response = resp_csn; + modulated_response_size = resp_csn_len; + trace_data = csn_data; + trace_data_size = sizeof(csn_data); + chip_state = SELECTED; + } + } - while(!exitLoop) { + } else if (receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 4) { // read block + uint16_t blockNo = receivedCmd[1]; + if (chip_state == SELECTED) { + if (simulationMode == ICLASS_SIM_MODE_EXIT_AFTER_MAC) { + // provide defaults for blocks 0 ... 5 + switch (blockNo) { + case 0: // csn (block 00) + modulated_response = resp_csn; + modulated_response_size = resp_csn_len; + trace_data = csn_data; + trace_data_size = sizeof(csn_data); + break; + case 1: // configuration (block 01) + modulated_response = resp_conf; + modulated_response_size = resp_conf_len; + trace_data = conf_block; + trace_data_size = sizeof(conf_block); + break; + case 2: // e-purse (block 02) + modulated_response = resp_cc; + modulated_response_size = resp_cc_len; + trace_data = card_challenge_data; + trace_data_size = sizeof(card_challenge_data); + // set epurse of sim2,4 attack + if (reader_mac_buf != NULL) { + memcpy(reader_mac_buf, card_challenge_data, 8); + } + break; + case 3: + case 4: // Kd, Kc, always respond with 0xff bytes + modulated_response = resp_ff; + modulated_response_size = resp_ff_len; + trace_data = ff_data; + trace_data_size = sizeof(ff_data); + break; + case 5: // Application Issuer Area (block 05) + modulated_response = resp_aia; + modulated_response_size = resp_aia_len; + trace_data = aia_data; + trace_data_size = sizeof(aia_data); + break; + // default: don't respond + } + } else if (simulationMode == ICLASS_SIM_MODE_FULL) { + if (blockNo == 3 || blockNo == 4) { // Kd, Kc, always respond with 0xff bytes + modulated_response = resp_ff; + modulated_response_size = resp_ff_len; + trace_data = ff_data; + trace_data_size = sizeof(ff_data); + } else { // use data from emulator memory + memcpy(data_generic_trace, emulator + current_page*page_size + 8*blockNo, 8); + AppendCrc(data_generic_trace, 8); + trace_data = data_generic_trace; + trace_data_size = 10; + CodeIso15693AsTag(trace_data, trace_data_size); + memcpy(data_response, ToSend, ToSendMax); + modulated_response = data_response; + modulated_response_size = ToSendMax; + } + } + } - LED_B_OFF(); - //Signal tracer - // Can be used to get a trigger for an oscilloscope.. - LED_C_OFF(); + } else if ((receivedCmd[0] == ICLASS_CMD_READCHECK_KD + || receivedCmd[0] == ICLASS_CMD_READCHECK_KC) && receivedCmd[1] == 0x02 && len == 2) { + // Read e-purse (88 02 || 18 02) + if (chip_state == SELECTED) { + if(receivedCmd[0] == ICLASS_CMD_READCHECK_KD){ + cipher_state = &cipher_state_KD[current_page]; + diversified_key = diversified_key_d; + } else { + cipher_state = &cipher_state_KC[current_page]; + diversified_key = diversified_key_c; + } + modulated_response = resp_cc; + modulated_response_size = resp_cc_len; + trace_data = card_challenge_data; + trace_data_size = sizeof(card_challenge_data); + } - if(!GetIClassCommandFromReader(receivedCmd, &len, 100)) { - buttonPressed = true; - break; - } - r2t_time = GetCountSspClk(); - //Signal tracer - LED_C_ON(); - - // Okay, look at the command now. - if(receivedCmd[0] == ICLASS_CMD_ACTALL ) { - // Reader in anticollission phase - modulated_response = resp_sof; modulated_response_size = resp_sof_Len; //order = 1; - trace_data = sof_data; - trace_data_size = sizeof(sof_data); - } else if(receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 1) { - // Reader asks for anticollission CSN - modulated_response = resp_anticoll; modulated_response_size = resp_anticoll_len; //order = 2; - trace_data = anticoll_data; - trace_data_size = sizeof(anticoll_data); - //DbpString("Reader requests anticollission CSN:"); - } else if(receivedCmd[0] == ICLASS_CMD_SELECT) { - // Reader selects anticollission CSN. - // Tag sends the corresponding real CSN - modulated_response = resp_csn; modulated_response_size = resp_csn_len; //order = 3; - trace_data = csn_data; - trace_data_size = sizeof(csn_data); - //DbpString("Reader selects anticollission CSN:"); - } else if(receivedCmd[0] == ICLASS_CMD_READCHECK_KD) { - // Read e-purse (88 02) - modulated_response = resp_cc; modulated_response_size = resp_cc_len; //order = 4; - trace_data = card_challenge_data; - trace_data_size = sizeof(card_challenge_data); - LED_B_ON(); - } else if(receivedCmd[0] == ICLASS_CMD_CHECK) { + } else if ((receivedCmd[0] == ICLASS_CMD_CHECK_KC + || receivedCmd[0] == ICLASS_CMD_CHECK_KD) && len == 9) { // Reader random and reader MAC!!! - if(simulationMode == MODE_FULLSIM) - { //This is what we must do.. - //Reader just sent us NR and MAC(k,cc * nr) - //The diversified key should be stored on block 3 - //However, from a typical dump, the key will not be there - uint8_t *diversified_key = { 0 }; - //Get the diversified key from emulator memory - memcpy(diversified_key, emulator+(8*3),8); - uint8_t ccnr[12] = { 0 }; - //Put our cc there (block 2) - memcpy(ccnr, emulator + (8 * 2), 8); - //Put nr there - memcpy(ccnr+8, receivedCmd+1,4); - //Now, calc MAC - doMAC(ccnr,diversified_key, trace_data); - trace_data_size = 4; - CodeIClassTagAnswer(trace_data , trace_data_size); + if (chip_state == SELECTED) { + if (simulationMode == ICLASS_SIM_MODE_FULL) { + //NR, from reader, is in receivedCmd+1 + opt_doTagMAC_2(*cipher_state, receivedCmd+1, data_generic_trace, diversified_key); + trace_data = data_generic_trace; + trace_data_size = 4; + CodeIso15693AsTag(trace_data, trace_data_size); + memcpy(data_response, ToSend, ToSendMax); + modulated_response = data_response; + modulated_response_size = ToSendMax; + //exitLoop = true; + } else { // Not fullsim, we don't respond + // We do not know what to answer, so lets keep quiet + if (simulationMode == ICLASS_SIM_MODE_EXIT_AFTER_MAC) { + if (reader_mac_buf != NULL) { + // save NR and MAC for sim 2,4 + memcpy(reader_mac_buf + 8, receivedCmd + 1, 8); + } + exitLoop = true; + } + } + } + + } else if (receivedCmd[0] == ICLASS_CMD_HALT && len == 1) { + if (chip_state == SELECTED) { + // Reader ends the session + modulated_response = resp_sof; + modulated_response_size = resp_sof_Len; + chip_state = HALTED; + } + + } else if (simulationMode == ICLASS_SIM_MODE_FULL && receivedCmd[0] == ICLASS_CMD_READ4 && len == 4) { // 0x06 + //Read 4 blocks + if (chip_state == SELECTED) { + uint8_t blockNo = receivedCmd[1]; + memcpy(data_generic_trace, emulator + current_page*page_size + blockNo*8, 8 * 4); + AppendCrc(data_generic_trace, 8 * 4); + trace_data = data_generic_trace; + trace_data_size = 8 * 4 + 2; + CodeIso15693AsTag(trace_data, trace_data_size); memcpy(data_response, ToSend, ToSendMax); modulated_response = data_response; modulated_response_size = ToSendMax; - }else - { //Not fullsim, we don't respond - // We do not know what to answer, so lets keep quiet - modulated_response = resp_sof; modulated_response_size = 0; - trace_data = NULL; - trace_data_size = 0; - if (simulationMode == MODE_EXIT_AFTER_MAC){ - // 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[3], receivedCmd[4], receivedCmd[5], - receivedCmd[6], receivedCmd[7], receivedCmd[8]); - if (reader_mac_buf != NULL) - { - memcpy(reader_mac_buf,receivedCmd+1,8); + } + + } else if (receivedCmd[0] == ICLASS_CMD_UPDATE && (len == 12 || len == 14)) { + // We're expected to respond with the data+crc, exactly what's already in the receivedCmd + // receivedCmd is now UPDATE 1b | ADDRESS 1b | DATA 8b | Signature 4b or CRC 2b + if (chip_state == SELECTED) { + uint8_t blockNo = receivedCmd[1]; + if (blockNo == 2) { // update e-purse + memcpy(card_challenge_data, receivedCmd+2, 8); + CodeIso15693AsTag(card_challenge_data, sizeof(card_challenge_data)); + memcpy(resp_cc, ToSend, ToSendMax); + resp_cc_len = ToSendMax; + cipher_state_KD[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_d); + cipher_state_KC[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_c); + if (simulationMode == ICLASS_SIM_MODE_FULL) { + memcpy(emulator + current_page*page_size + 8*2, card_challenge_data, 8); + } + } else if (blockNo == 3) { // update Kd + for (int i = 0; i < 8; i++) { + if (personalization_mode) { + diversified_key_d[i] = receivedCmd[2 + i]; + } else { + diversified_key_d[i] ^= receivedCmd[2 + i]; + } } - exitLoop = true; + cipher_state_KD[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_d); + if (simulationMode == ICLASS_SIM_MODE_FULL) { + memcpy(emulator + current_page*page_size + 8*3, diversified_key_d, 8); + } + } else if (blockNo == 4) { // update Kc + for (int i = 0; i < 8; i++) { + if (personalization_mode) { + diversified_key_c[i] = receivedCmd[2 + i]; + } else { + diversified_key_c[i] ^= receivedCmd[2 + i]; + } + } + cipher_state_KC[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_c); + if (simulationMode == ICLASS_SIM_MODE_FULL) { + memcpy(emulator + current_page*page_size + 8*4, diversified_key_c, 8); + } + } else if (simulationMode == ICLASS_SIM_MODE_FULL) { // update any other data block + memcpy(emulator + current_page*page_size + 8*blockNo, receivedCmd+2, 8); } + memcpy(data_generic_trace, receivedCmd + 2, 8); + AppendCrc(data_generic_trace, 8); + trace_data = data_generic_trace; + trace_data_size = 10; + CodeIso15693AsTag(trace_data, trace_data_size); + memcpy(data_response, ToSend, ToSendMax); + modulated_response = data_response; + modulated_response_size = ToSendMax; } - } else if(receivedCmd[0] == ICLASS_CMD_HALT && len == 1) { - // Reader ends the session - modulated_response = resp_sof; modulated_response_size = 0; //order = 0; - trace_data = NULL; - trace_data_size = 0; - } else if(simulationMode == MODE_FULLSIM && receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 4){ - //Read block - uint16_t blk = receivedCmd[1]; - trace_data = emulator+(blk << 3); - trace_data_size = 8; - CodeIClassTagAnswer(trace_data , trace_data_size); - memcpy(data_response, ToSend, ToSendMax); - modulated_response = data_response; - modulated_response_size = ToSendMax; - } - else { - //#db# Unknown command received from reader (len=5): 26 1 0 f6 a 44 44 44 44 - // Never seen this command before - Dbprintf("Unknown command received from reader (len=%d): %x %x %x %x %x %x %x %x %x", - len, - receivedCmd[0], receivedCmd[1], receivedCmd[2], - receivedCmd[3], receivedCmd[4], receivedCmd[5], - receivedCmd[6], receivedCmd[7], receivedCmd[8]); + } else if (receivedCmd[0] == ICLASS_CMD_PAGESEL && len == 4) { + // Pagesel + // Chips with a single page will not answer to this command + // Otherwise, we should answer 8bytes (conf block 1) + 2bytes CRC + if (chip_state == SELECTED) { + if (simulationMode == ICLASS_SIM_MODE_FULL && max_page > 0) { + current_page = receivedCmd[1]; + memcpy(data_generic_trace, emulator + current_page*page_size + 8*1, 8); + memcpy(diversified_key_d, emulator + current_page*page_size + 8*3, 8); + memcpy(diversified_key_c, emulator + current_page*page_size + 8*4, 8); + cipher_state = &cipher_state_KD[current_page]; + personalization_mode = data_generic_trace[7] & 0x80; + AppendCrc(data_generic_trace, 8); + trace_data = data_generic_trace; + trace_data_size = 10; + CodeIso15693AsTag(trace_data, trace_data_size); + memcpy(data_response, ToSend, ToSendMax); + modulated_response = data_response; + modulated_response_size = ToSendMax; + } + } + + } else if (receivedCmd[0] == 0x26 && len == 5) { + // standard ISO15693 INVENTORY command. Ignore. + + } else { + // don't know how to handle this command + char debug_message[250]; // should be enough + sprintf(debug_message, "Unhandled command (len = %d) received from reader:", len); + for (int i = 0; i < len && strlen(debug_message) < sizeof(debug_message) - 3 - 1; i++) { + sprintf(debug_message + strlen(debug_message), " %02x", receivedCmd[i]); + } + Dbprintf("%s", debug_message); // Do not respond - modulated_response = resp_sof; modulated_response_size = 0; //order = 0; - trace_data = NULL; - trace_data_size = 0; } - if(cmdsRecvd > 100) { - //DbpString("100 commands later..."); - //break; - } - else { - cmdsRecvd++; - } /** - A legit tag has about 380us delay between reader EOT and tag SOF. + A legit tag has about 273,4us delay between reader EOT and tag SOF. **/ - if(modulated_response_size > 0) { - SendIClassAnswer(modulated_response, modulated_response_size, 1); - t2r_time = GetCountSspClk(); + if (modulated_response_size > 0) { + uint32_t response_time = reader_eof_time + DELAY_ICLASS_VCD_TO_VICC_SIM - TAG_SOF_UNMODULATED - DELAY_ARM_TO_READER_SIM; + TransmitTo15693Reader(modulated_response, modulated_response_size, &response_time, 0, false); + LogTrace(trace_data, trace_data_size, response_time + DELAY_ARM_TO_READER_SIM, response_time + (modulated_response_size << 6) + DELAY_ARM_TO_READER_SIM, NULL, false); } - if (tracing) { - 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 (trace_data != NULL) { - GetParity(trace_data, trace_data_size, parity); - LogTrace(trace_data, trace_data_size, (t2r_time-time_0) << 4, (t2r_time-time_0) << 4, parity, FALSE); - } - if(!tracing) { - DbpString("Trace full"); - //break; - } - - } - memset(receivedCmd, 0x44, MAX_FRAME_SIZE); } - //Dbprintf("%x", cmdsRecvd); - LED_A_OFF(); - LED_B_OFF(); - LED_C_OFF(); - - if(buttonPressed) + if (buttonPressed) { DbpString("Button pressed"); } return buttonPressed; } -static int SendIClassAnswer(uint8_t *resp, int respLen, int delay) -{ - int i = 0, d=0;//, u = 0, d = 0; - uint8_t b = 0; +/** + * @brief SimulateIClass simulates an iClass card. + * @param arg0 type of simulation + * - 0 uses the first 8 bytes in usb data as CSN + * - 2 "dismantling iclass"-attack. This mode iterates through all CSN's specified + * in the usb data. This mode collects MAC from the reader, in order to do an offline + * attack on the keys. For more info, see "dismantling iclass" and proxclone.com. + * - Other : Uses the default CSN (031fec8af7ff12e0) + * @param arg1 - number of CSN's contained in datain (applicable for mode 2 only) + * @param arg2 + * @param datain + */ +void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain) { + + LED_A_ON(); - //FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR|FPGA_HF_SIMULATOR_MODULATE_424K); - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR|FPGA_HF_SIMULATOR_MODULATE_424K_8BIT); + uint32_t simType = arg0; + uint32_t numberOfCSNS = arg1; - AT91C_BASE_SSC->SSC_THR = 0x00; - FpgaSetupSsc(); - while(!BUTTON_PRESS()) { - if((AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)){ - b = AT91C_BASE_SSC->SSC_RHR; (void) b; - } - if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)){ - b = 0x00; - if(d < delay) { - d++; - } - else { - if( i < respLen){ - b = resp[i]; - //Hack - //b = 0xAC; - } - i++; + // setup hardware for simulation: + FpgaDownloadAndGo(FPGA_BITSTREAM_HF); + SetAdcMuxFor(GPIO_MUXSEL_HIPKD); + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_NO_MODULATION); + LED_D_OFF(); + FpgaSetupSsc(FPGA_MAJOR_MODE_HF_SIMULATOR); + StartCountSspClk(); + + // Enable and clear the trace + set_tracing(true); + clear_trace(); + //Use the emulator memory for SIM + uint8_t *emulator = BigBuf_get_EM_addr(); + + if (simType == ICLASS_SIM_MODE_CSN) { + // Use the CSN from commandline + memcpy(emulator, datain, 8); + doIClassSimulation(ICLASS_SIM_MODE_CSN, NULL); + } else if (simType == ICLASS_SIM_MODE_CSN_DEFAULT) { + //Default CSN + uint8_t csn_crc[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 0x00, 0x00 }; + // Use the CSN from commandline + memcpy(emulator, csn_crc, 8); + doIClassSimulation(ICLASS_SIM_MODE_CSN, NULL); + } else if (simType == ICLASS_SIM_MODE_READER_ATTACK) { + uint8_t mac_responses[USB_CMD_DATA_SIZE] = { 0 }; + 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 offline-attack + // in order to obtain the keys, as in the "dismantling iclass"-paper. + int i; + for (i = 0; i < numberOfCSNS && i*16+16 <= USB_CMD_DATA_SIZE; i++) { + // The usb data is 512 bytes, fitting 32 responses (8 byte CC + 4 Byte NR + 4 Byte MAC = 16 Byte response). + memcpy(emulator, datain+(i*8), 8); + if (doIClassSimulation(ICLASS_SIM_MODE_EXIT_AFTER_MAC, mac_responses+i*16)) { + // Button pressed + break; } - AT91C_BASE_SSC->SSC_THR = b; + Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x", + datain[i*8+0], datain[i*8+1], datain[i*8+2], datain[i*8+3], + datain[i*8+4], datain[i*8+5], datain[i*8+6], datain[i*8+7]); + Dbprintf("NR,MAC: %02x %02x %02x %02x %02x %02x %02x %02x", + mac_responses[i*16+ 8], mac_responses[i*16+ 9], mac_responses[i*16+10], mac_responses[i*16+11], + mac_responses[i*16+12], mac_responses[i*16+13], mac_responses[i*16+14], mac_responses[i*16+15]); + SpinDelay(100); // give the reader some time to prepare for next CSN } - -// if (i > respLen +4) break; - if (i > respLen +1) break; + cmd_send(CMD_ACK, CMD_SIMULATE_TAG_ICLASS, i, 0, mac_responses, i*16); + } else if (simType == ICLASS_SIM_MODE_FULL) { + //This is 'full sim' mode, where we use the emulator storage for data. + doIClassSimulation(ICLASS_SIM_MODE_FULL, NULL); + } else { + // We may want a mode here where we hardcode the csns to use (from proxclone). + // That will speed things up a little, but not required just yet. + Dbprintf("The mode is not implemented, reserved for future use"); } - return 0; + Dbprintf("Done..."); + + LED_A_OFF(); } + /// THE READER CODE //----------------------------------------------------------------------------- // Transmit the command (to the tag) that was placed in ToSend[]. //----------------------------------------------------------------------------- -static void TransmitIClassCommand(const uint8_t *cmd, int len, int *samples, int *wait) -{ - int c; - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); - AT91C_BASE_SSC->SSC_THR = 0x00; - FpgaSetupSsc(); - - if (wait) - { - if(*wait < 10) *wait = 10; - - for(c = 0; c < *wait;) { - if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { - AT91C_BASE_SSC->SSC_THR = 0x00; // For exact timing! - c++; - } - if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { - volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR; - (void)r; - } - WDT_HIT(); - } - - } - - - uint8_t sendbyte; - bool firstpart = TRUE; - c = 0; - for(;;) { - if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { - - // DOUBLE THE SAMPLES! - if(firstpart) { - sendbyte = (cmd[c] & 0xf0) | (cmd[c] >> 4); - } - else { - sendbyte = (cmd[c] & 0x0f) | (cmd[c] << 4); - c++; - } - if(sendbyte == 0xff) { - sendbyte = 0xfe; - } - AT91C_BASE_SSC->SSC_THR = sendbyte; - firstpart = !firstpart; - - if(c >= len) { - break; - } - } - if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { - volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR; - (void)r; - } - WDT_HIT(); - } - if (samples) *samples = (c + *wait) << 3; +static void TransmitIClassCommand(const uint8_t *cmd, int len, int *samples, int *wait) { + int c; + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); + AT91C_BASE_SSC->SSC_THR = 0x00; + FpgaSetupSsc(FPGA_MAJOR_MODE_HF_ISO14443A); + + if (wait) { + if (*wait < 10) *wait = 10; + + for (c = 0; c < *wait;) { + if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { + AT91C_BASE_SSC->SSC_THR = 0x00; // For exact timing! + c++; + } + if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { + volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR; + (void)r; + } + WDT_HIT(); + } + } + + uint8_t sendbyte; + bool firstpart = true; + c = 0; + for (;;) { + if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { + + // DOUBLE THE SAMPLES! + if (firstpart) { + sendbyte = (cmd[c] & 0xf0) | (cmd[c] >> 4); + } else { + sendbyte = (cmd[c] & 0x0f) | (cmd[c] << 4); + c++; + } + if (sendbyte == 0xff) { + sendbyte = 0xfe; + } + AT91C_BASE_SSC->SSC_THR = sendbyte; + firstpart = !firstpart; + + if (c >= len) { + break; + } + } + if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { + volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR; + (void)r; + } + WDT_HIT(); + } + if (samples && wait) *samples = (c + *wait) << 3; } //----------------------------------------------------------------------------- // Prepare iClass reader command to send to FPGA //----------------------------------------------------------------------------- -void CodeIClassCommand(const uint8_t * cmd, int len) -{ - int i, j, k; - uint8_t b; - - ToSendReset(); - - // Start of Communication: 1 out of 4 - ToSend[++ToSendMax] = 0xf0; - ToSend[++ToSendMax] = 0x00; - ToSend[++ToSendMax] = 0x0f; - ToSend[++ToSendMax] = 0x00; - - // Modulate the bytes - for (i = 0; i < len; i++) { - b = cmd[i]; - for(j = 0; j < 4; j++) { - for(k = 0; k < 4; k++) { - if(k == (b & 3)) { - ToSend[++ToSendMax] = 0x0f; - } - else { - ToSend[++ToSendMax] = 0x00; +void CodeIClassCommand(const uint8_t *cmd, int len) { + int i, j, k; + + ToSendReset(); + + // Start of Communication: 1 out of 4 + ToSend[++ToSendMax] = 0xf0; + ToSend[++ToSendMax] = 0x00; + ToSend[++ToSendMax] = 0x0f; + ToSend[++ToSendMax] = 0x00; + + // Modulate the bytes + for (i = 0; i < len; i++) { + uint8_t b = cmd[i]; + for (j = 0; j < 4; j++) { + for (k = 0; k < 4; k++) { + if (k == (b & 3)) { + ToSend[++ToSendMax] = 0x0f; + } else { + ToSend[++ToSendMax] = 0x00; + } } - } - b >>= 2; - } - } - - // End of Communication - ToSend[++ToSendMax] = 0x00; - ToSend[++ToSendMax] = 0x00; - ToSend[++ToSendMax] = 0xf0; - ToSend[++ToSendMax] = 0x00; - - // Convert from last character reference to length - ToSendMax++; + b >>= 2; + } + } + + // End of Communication + ToSend[++ToSendMax] = 0x00; + ToSend[++ToSendMax] = 0x00; + ToSend[++ToSendMax] = 0xf0; + ToSend[++ToSendMax] = 0x00; + + // Convert from last character reference to length + ToSendMax++; } -void ReaderTransmitIClass(uint8_t* frame, int len) -{ +static void ReaderTransmitIClass(uint8_t *frame, int len) { int wait = 0; int samples = 0; // This is tied to other size changes - CodeIClassCommand(frame,len); + CodeIClassCommand(frame, len); // Select the card TransmitIClassCommand(ToSend, ToSendMax, &samples, &wait); - if(trigger) + if (trigger) LED_A_ON(); // Store reader command in buffer - if (tracing) { - uint8_t par[MAX_PARITY_SIZE]; - GetParity(frame, len, par); - LogTrace(frame, len, rsamples, rsamples, par, TRUE); - } + uint8_t par[MAX_PARITY_SIZE]; + GetParity(frame, len, par); + LogTrace(frame, len, rsamples, rsamples, par, true); } //----------------------------------------------------------------------------- // Wait a certain time for tag response -// If a response is captured return TRUE -// If it takes too long return FALSE +// If a response is captured return true +// If it takes too long return false //----------------------------------------------------------------------------- -static int GetIClassAnswer(uint8_t *receivedResponse, int maxLen, int *samples, int *elapsed) //uint8_t *buffer -{ +static int GetIClassAnswer(uint8_t *receivedResponse, int maxLen, int *samples, int *elapsed) { + //uint8_t *buffer // buffer needs to be 512 bytes int c; @@ -1499,81 +1464,81 @@ static int GetIClassAnswer(uint8_t *receivedResponse, int maxLen, int *samples, uint8_t b; if (elapsed) *elapsed = 0; - bool skip = FALSE; + bool skip = false; c = 0; - for(;;) { + for (;;) { WDT_HIT(); - if(BUTTON_PRESS()) return FALSE; + if (BUTTON_PRESS()) return false; - if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { + if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { AT91C_BASE_SSC->SSC_THR = 0x00; // To make use of exact timing of next command from reader!! if (elapsed) (*elapsed)++; } - if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { - if(c < timeout) { c++; } else { return FALSE; } + if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { + if (c < timeout) { + c++; + } else { + return false; + } b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; skip = !skip; - if(skip) continue; - - if(ManchesterDecoding(b & 0x0f)) { + if (skip) continue; + + if (ManchesterDecoding(b & 0x0f)) { *samples = c << 3; - return TRUE; + return true; } } } } -int ReaderReceiveIClass(uint8_t* receivedAnswer) -{ - int samples = 0; - if (!GetIClassAnswer(receivedAnswer,160,&samples,0)) return FALSE; - rsamples += samples; - if (tracing) { +static int ReaderReceiveIClass(uint8_t *receivedAnswer) { + int samples = 0; + if (!GetIClassAnswer(receivedAnswer, 160, &samples, 0)) { + return false; + } + rsamples += samples; 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; + LogTrace(receivedAnswer, Demod.len, rsamples, rsamples, parity, false); + if (samples == 0) return false; + return Demod.len; } -void setupIclassReader() -{ - FpgaDownloadAndGo(FPGA_BITSTREAM_HF); - // Reset trace buffer - set_tracing(TRUE); +static void setupIclassReader() { + FpgaDownloadAndGo(FPGA_BITSTREAM_HF); + // Reset trace buffer + set_tracing(true); clear_trace(); - // Setup SSC - FpgaSetupSsc(); - // Start from off (no field generated) - // Signal field is off with the appropriate LED - LED_D_OFF(); - FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); - SpinDelay(200); + // Setup SSC + FpgaSetupSsc(FPGA_MAJOR_MODE_HF_ISO14443A); + // Start from off (no field generated) + // Signal field is off with the appropriate LED + LED_D_OFF(); + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); + SpinDelay(200); - SetAdcMuxFor(GPIO_MUXSEL_HIPKD); + SetAdcMuxFor(GPIO_MUXSEL_HIPKD); - // Now give it time to spin up. - // Signal field is on with the appropriate LED - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); - SpinDelay(200); - LED_A_ON(); + // Now give it time to spin up. + // Signal field is on with the appropriate LED + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); + SpinDelay(200); + LED_A_ON(); } -size_t sendCmdGetResponseWithRetries(uint8_t* command, size_t cmdsize, uint8_t* resp, uint8_t expected_size, uint8_t retries) -{ - while(retries-- > 0) - { +static bool sendCmdGetResponseWithRetries(uint8_t* command, size_t cmdsize, uint8_t* resp, uint8_t expected_size, uint8_t retries) { + while (retries-- > 0) { ReaderTransmitIClass(command, cmdsize); - if(expected_size == ReaderReceiveIClass(resp)){ - return 0; + if (expected_size == ReaderReceiveIClass(resp)) { + return true; } } - return 1;//Error + return false;//Error } /** @@ -1583,12 +1548,17 @@ size_t sendCmdGetResponseWithRetries(uint8_t* command, size_t cmdsize, uint8_t* * 1 = Got CSN * 2 = Got CSN and CC */ -uint8_t handshakeIclassTag(uint8_t *card_data) -{ +static uint8_t handshakeIclassTag_ext(uint8_t *card_data, bool use_credit_key) { static uint8_t act_all[] = { 0x0a }; - static uint8_t identify[] = { 0x0c }; + //static uint8_t identify[] = { 0x0c }; + static uint8_t identify[] = { 0x0c, 0x00, 0x73, 0x33 }; static uint8_t select[] = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; static uint8_t readcheck_cc[]= { 0x88, 0x02 }; + if (use_credit_key) + readcheck_cc[0] = 0x18; + else + readcheck_cc[0] = 0x88; + uint8_t resp[ICLASS_BUFFER_SIZE]; uint8_t read_status = 0; @@ -1596,101 +1566,155 @@ uint8_t handshakeIclassTag(uint8_t *card_data) // Send act_all ReaderTransmitIClass(act_all, 1); // Card present? - if(!ReaderReceiveIClass(resp)) return read_status;//Fail + if (!ReaderReceiveIClass(resp)) return read_status;//Fail + //Send Identify ReaderTransmitIClass(identify, 1); //We expect a 10-byte response here, 8 byte anticollision-CSN and 2 byte CRC - uint8_t len = ReaderReceiveIClass(resp); - if(len != 10) return read_status;//Fail + uint8_t len = ReaderReceiveIClass(resp); + if (len != 10) return read_status;//Fail //Copy the Anti-collision CSN to our select-packet - memcpy(&select[1],resp,8); + memcpy(&select[1], resp, 8); //Select the card ReaderTransmitIClass(select, sizeof(select)); //We expect a 10-byte response here, 8 byte CSN and 2 byte CRC - len = ReaderReceiveIClass(resp); - if(len != 10) return read_status;//Fail + len = ReaderReceiveIClass(resp); + if (len != 10) return read_status;//Fail //Success - level 1, we got CSN //Save CSN in response data - memcpy(card_data,resp,8); + memcpy(card_data, resp, 8); //Flag that we got to at least stage 1, read CSN read_status = 1; - // Card selected, now read e-purse (cc) + // Card selected, now read e-purse (cc) (only 8 bytes no CRC) ReaderTransmitIClass(readcheck_cc, sizeof(readcheck_cc)); - if(ReaderReceiveIClass(resp) == 8) { + if (ReaderReceiveIClass(resp) == 8) { //Save CC (e-purse) in response data - memcpy(card_data+8,resp,8); - - //Got both - read_status = 2; + memcpy(card_data+8, resp, 8); + read_status++; } return read_status; } -// Reader iClass Anticollission -void ReaderIClass(uint8_t arg0) { +static uint8_t handshakeIclassTag(uint8_t *card_data) { + return handshakeIclassTag_ext(card_data, false); +} - uint8_t card_data[24]={0}; - uint8_t last_csn[8]={0}; - - int read_status= 0; - bool abort_after_read = arg0 & FLAG_ICLASS_READER_ONLY_ONCE; - bool get_cc = arg0 & FLAG_ICLASS_READER_GET_CC; - set_tracing(TRUE); - setupIclassReader(); - size_t datasize = 0; - while(!BUTTON_PRESS()) - { +// Reader iClass Anticollission +void ReaderIClass(uint8_t arg0) { - if(!tracing) { + uint8_t card_data[6 * 8] = {0}; + memset(card_data, 0xFF, sizeof(card_data)); + uint8_t last_csn[8] = {0,0,0,0,0,0,0,0}; + uint8_t resp[ICLASS_BUFFER_SIZE]; + memset(resp, 0xFF, sizeof(resp)); + //Read conf block CRC(0x01) => 0xfa 0x22 + uint8_t readConf[] = { ICLASS_CMD_READ_OR_IDENTIFY, 0x01, 0xfa, 0x22}; + //Read App Issuer Area block CRC(0x05) => 0xde 0x64 + uint8_t readAA[] = { ICLASS_CMD_READ_OR_IDENTIFY, 0x05, 0xde, 0x64}; + + int read_status= 0; + uint8_t result_status = 0; + // flag to read until one tag is found successfully + bool abort_after_read = arg0 & FLAG_ICLASS_READER_ONLY_ONCE; + // flag to only try 5 times to find one tag then return + bool try_once = arg0 & FLAG_ICLASS_READER_ONE_TRY; + // if neither abort_after_read nor try_once then continue reading until button pressed. + + bool use_credit_key = arg0 & FLAG_ICLASS_READER_CEDITKEY; + // test flags for what blocks to be sure to read + uint8_t flagReadConfig = arg0 & FLAG_ICLASS_READER_CONF; + uint8_t flagReadCC = arg0 & FLAG_ICLASS_READER_CC; + uint8_t flagReadAA = arg0 & FLAG_ICLASS_READER_AA; + + set_tracing(true); + setupIclassReader(); + + uint16_t tryCnt = 0; + bool userCancelled = BUTTON_PRESS() || usb_poll_validate_length(); + while (!userCancelled) { + // if only looking for one card try 2 times if we missed it the first time + if (try_once && tryCnt > 2) { + break; + } + tryCnt++; + if (!get_tracing()) { DbpString("Trace full"); break; } WDT_HIT(); - read_status = handshakeIclassTag(card_data); + read_status = handshakeIclassTag_ext(card_data, use_credit_key); + + if (read_status == 0) continue; + if (read_status == 1) result_status = FLAG_ICLASS_READER_CSN; + if (read_status == 2) result_status = FLAG_ICLASS_READER_CSN | FLAG_ICLASS_READER_CC; + + // handshakeIclass returns CSN|CC, but the actual block + // layout is CSN|CONFIG|CC, so here we reorder the data, + // moving CC forward 8 bytes + memcpy(card_data+16, card_data+8, 8); + //Read block 1, config + if (flagReadConfig) { + if (sendCmdGetResponseWithRetries(readConf, sizeof(readConf), resp, 10, 10)) { + result_status |= FLAG_ICLASS_READER_CONF; + memcpy(card_data+8, resp, 8); + } else { + Dbprintf("Failed to dump config block"); + } + } - if(read_status == 0) continue; - if(read_status == 1) datasize = 8; - if(read_status == 2) datasize = 16; + //Read block 5, AA + if (flagReadAA) { + if (sendCmdGetResponseWithRetries(readAA, sizeof(readAA), resp, 10, 10)) { + result_status |= FLAG_ICLASS_READER_AA; + memcpy(card_data + (8*5), resp, 8); + } else { + //Dbprintf("Failed to dump AA block"); + } + } - //Todo, read the public blocks 1,5 aswell: - // - // 0 : CSN (we already have) + // 0 : CSN // 1 : Configuration - // 2 : e-purse (we already have) - // (3,4 write-only) - // 5 Application issuer area - // - //Then we can 'ship' back the 8 * 5 bytes of data, + // 2 : e-purse + // 3 : kd / debit / aa2 (write-only) + // 4 : kc / credit / aa1 (write-only) + // 5 : AIA, Application issuer area + //Then we can 'ship' back the 6 * 8 bytes of data, // with 0xFF:s in block 3 and 4. LED_B_ON(); - //Send back to client, but don't bother if we already sent this - if(memcmp(last_csn, card_data, 8) != 0) - { - - if(!get_cc || (get_cc && read_status == 2)) - { - cmd_send(CMD_ACK,read_status,0,0,card_data,datasize); - if(abort_after_read) { + //Send back to client, but don't bother if we already sent this - + // only useful if looping in arm (not try_once && not abort_after_read) + if (memcmp(last_csn, card_data, 8) != 0) { + // If caller requires that we get Conf, CC, AA, continue until we got it + if ( (result_status ^ FLAG_ICLASS_READER_CSN ^ flagReadConfig ^ flagReadCC ^ flagReadAA) == 0) { + cmd_send(CMD_ACK, result_status, 0, 0, card_data, sizeof(card_data)); + if (abort_after_read) { + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); LED_A_OFF(); + LED_B_OFF(); return; } //Save that we already sent this.... memcpy(last_csn, card_data, 8); } - //If 'get_cc' was specified and we didn't get a CC, we'll just keep trying... + } LED_B_OFF(); - } - cmd_send(CMD_ACK,0,0,0,card_data, 0); - LED_A_OFF(); + userCancelled = BUTTON_PRESS() || usb_poll_validate_length(); + } + if (userCancelled) { + cmd_send(CMD_ACK, 0xFF, 0, 0, card_data, 0); + } else { + cmd_send(CMD_ACK, 0, 0, 0, card_data, 0); + } + LED_A_OFF(); } void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) { @@ -1698,100 +1722,95 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) { uint8_t card_data[USB_CMD_DATA_SIZE]={0}; uint16_t block_crc_LUT[255] = {0}; - {//Generate a lookup table for block crc - for(int block = 0; block < 255; block++){ - char bl = block; - block_crc_LUT[block] = iclass_crc16(&bl ,1); - } + //Generate a lookup table for block crc + for (int block = 0; block < 255; block++){ + char bl = block; + block_crc_LUT[block] = iclass_crc16(&bl ,1); } //Dbprintf("Lookup table: %02x %02x %02x" ,block_crc_LUT[0],block_crc_LUT[1],block_crc_LUT[2]); uint8_t check[] = { 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; uint8_t read[] = { 0x0c, 0x00, 0x00, 0x00 }; - - uint16_t crc = 0; - uint8_t cardsize=0; - uint8_t mem=0; - - static struct memory_t{ - int k16; - int book; - int k2; - int lockauth; - int keyaccess; + + uint16_t crc = 0; + uint8_t cardsize = 0; + uint8_t mem = 0; + + static struct memory_t { + int k16; + int book; + int k2; + int lockauth; + int keyaccess; } memory; - + uint8_t resp[ICLASS_BUFFER_SIZE]; - - setupIclassReader(); - set_tracing(TRUE); - while(!BUTTON_PRESS()) { - + setupIclassReader(); + set_tracing(true); + + while (!BUTTON_PRESS()) { + WDT_HIT(); - if(!tracing) { + if (!get_tracing()) { DbpString("Trace full"); break; } - + uint8_t read_status = handshakeIclassTag(card_data); - if(read_status < 2) continue; + if (read_status < 2) continue; //for now replay captured auth (as cc not updated) - memcpy(check+5,MAC,4); + memcpy(check+5, MAC, 4); - if(sendCmdGetResponseWithRetries(check, sizeof(check),resp, 4, 5)) - { + if (!sendCmdGetResponseWithRetries(check, sizeof(check), resp, 4, 5)) { Dbprintf("Error: Authentication Fail!"); continue; } //first get configuration block (block 1) crc = block_crc_LUT[1]; - read[1]=1; + read[1] = 1; read[2] = crc >> 8; read[3] = crc & 0xff; - if(sendCmdGetResponseWithRetries(read, sizeof(read),resp, 10, 10)) - { + if (!sendCmdGetResponseWithRetries(read, sizeof(read),resp, 10, 10)) { Dbprintf("Dump config (block 1) failed"); continue; } - mem=resp[5]; - memory.k16= (mem & 0x80); - memory.book= (mem & 0x20); - memory.k2= (mem & 0x8); - memory.lockauth= (mem & 0x2); - memory.keyaccess= (mem & 0x1); + mem = resp[5]; + memory.k16 = (mem & 0x80); + memory.book = (mem & 0x20); + memory.k2 = (mem & 0x8); + memory.lockauth = (mem & 0x2); + memory.keyaccess = (mem & 0x1); cardsize = memory.k16 ? 255 : 32; WDT_HIT(); //Set card_data to all zeroes, we'll fill it with data - memset(card_data,0x0,USB_CMD_DATA_SIZE); - uint8_t failedRead =0; - uint32_t stored_data_length =0; + memset(card_data, 0x0, USB_CMD_DATA_SIZE); + uint8_t failedRead = 0; + uint32_t stored_data_length = 0; //then loop around remaining blocks - for(int block=0; block < cardsize; block++){ - - read[1]= block; + for (int block = 0; block < cardsize; block++) { + read[1] = block; crc = block_crc_LUT[block]; read[2] = crc >> 8; read[3] = crc & 0xff; - if(!sendCmdGetResponseWithRetries(read, sizeof(read), resp, 10, 10)) - { + if (sendCmdGetResponseWithRetries(read, sizeof(read), resp, 10, 10)) { Dbprintf(" %02x: %02x %02x %02x %02x %02x %02x %02x %02x", - block, resp[0], resp[1], resp[2], + block, resp[0], resp[1], resp[2], resp[3], resp[4], resp[5], resp[6], resp[7]); //Fill up the buffer - memcpy(card_data+stored_data_length,resp,8); + memcpy(card_data+stored_data_length, resp, 8); stored_data_length += 8; - if(stored_data_length +8 > USB_CMD_DATA_SIZE) - {//Time to send this off and start afresh + if (stored_data_length +8 > USB_CMD_DATA_SIZE) { + //Time to send this off and start afresh cmd_send(CMD_ACK, stored_data_length,//data length failedRead,//Failed blocks? @@ -1802,21 +1821,21 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) { failedRead = 0; } - }else{ + } else { failedRead = 1; - stored_data_length +=8;//Otherwise, data becomes misaligned + stored_data_length += 8;//Otherwise, data becomes misaligned Dbprintf("Failed to dump block %d", block); } } //Send off any remaining data - if(stored_data_length > 0) - { + if (stored_data_length > 0) { cmd_send(CMD_ACK, stored_data_length,//data length failedRead,//Failed blocks? 0,//Not used ATM - card_data, stored_data_length); + card_data, + stored_data_length); } //If we got here, let's break break; @@ -1826,135 +1845,141 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) { 0,//data length 0,//Failed blocks? 0,//Not used ATM - card_data, 0); + card_data, + 0); + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); LED_A_OFF(); } -//2. Create Read method (cut-down from above) based off responses from 1. -// Since we have the MAC could continue to use replay function. -//3. Create Write method -/* -void IClass_iso14443A_write(uint8_t arg0, uint8_t blockNo, uint8_t *data, uint8_t *MAC) { - uint8_t act_all[] = { 0x0a }; - uint8_t identify[] = { 0x0c }; - uint8_t select[] = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; - uint8_t readcheck_cc[]= { 0x88, 0x02 }; - uint8_t check[] = { 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; - uint8_t read[] = { 0x0c, 0x00, 0x00, 0x00 }; - uint8_t write[] = { 0x87, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; - - uint16_t crc = 0; - - uint8_t* resp = (((uint8_t *)BigBuf) + 3560); +void iClass_Authentication(uint8_t *MAC) { + uint8_t check[] = { ICLASS_CMD_CHECK_KD, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; + uint8_t resp[ICLASS_BUFFER_SIZE]; + memcpy(check+5, MAC, 4); + bool isOK; + isOK = sendCmdGetResponseWithRetries(check, sizeof(check), resp, 4, 6); + cmd_send(CMD_ACK,isOK, 0, 0, 0, 0); +} - // Reset trace buffer - memset(trace, 0x44, RECV_CMD_OFFSET); - traceLen = 0; +static bool iClass_ReadBlock(uint8_t blockNo, uint8_t *readdata) { + uint8_t readcmd[] = {ICLASS_CMD_READ_OR_IDENTIFY, blockNo, 0x00, 0x00}; //0x88, 0x00 // can i use 0C? + char bl = blockNo; + uint16_t rdCrc = iclass_crc16(&bl, 1); + readcmd[2] = rdCrc >> 8; + readcmd[3] = rdCrc & 0xff; + uint8_t resp[] = {0,0,0,0,0,0,0,0,0,0}; + bool isOK = false; - // Setup SSC - FpgaSetupSsc(); - // Start from off (no field generated) - // Signal field is off with the appropriate LED - LED_D_OFF(); - FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); - SpinDelay(200); + //readcmd[1] = blockNo; + isOK = sendCmdGetResponseWithRetries(readcmd, sizeof(readcmd), resp, 10, 10); + memcpy(readdata, resp, sizeof(resp)); - SetAdcMuxFor(GPIO_MUXSEL_HIPKD); + return isOK; +} - // Now give it time to spin up. - // Signal field is on with the appropriate LED - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); - SpinDelay(200); +void iClass_ReadBlk(uint8_t blockno) { + uint8_t readblockdata[] = {0,0,0,0,0,0,0,0,0,0}; + bool isOK = false; + isOK = iClass_ReadBlock(blockno, readblockdata); + cmd_send(CMD_ACK, isOK, 0, 0, readblockdata, 8); + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); +} - LED_A_ON(); +void iClass_Dump(uint8_t blockno, uint8_t numblks) { + uint8_t readblockdata[] = {0,0,0,0,0,0,0,0,0,0}; + bool isOK = false; + uint8_t blkCnt = 0; - for(int i=0;i<1;i++) { - - if(traceLen > TRACE_SIZE) { - DbpString("Trace full"); - break; + BigBuf_free(); + uint8_t *dataout = BigBuf_malloc(255*8); + if (dataout == NULL) { + Dbprintf("out of memory"); + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); + LED_D_OFF(); + cmd_send(CMD_ACK, 0, 1, 0, 0, 0); + LED_A_OFF(); + return; + } + memset(dataout, 0xFF, 255*8); + + for ( ; blkCnt < numblks; blkCnt++) { + isOK = iClass_ReadBlock(blockno+blkCnt, readblockdata); + if (!isOK || (readblockdata[0] == 0xBB || readblockdata[7] == 0xBB || readblockdata[2] == 0xBB)) { //try again + isOK = iClass_ReadBlock(blockno+blkCnt, readblockdata); + if (!isOK) { + Dbprintf("Block %02X failed to read", blkCnt+blockno); + break; + } } - - if (BUTTON_PRESS()) break; - - // Send act_all - ReaderTransmitIClass(act_all, 1); - // Card present? - if(ReaderReceiveIClass(resp)) { - ReaderTransmitIClass(identify, 1); - if(ReaderReceiveIClass(resp) == 10) { - // Select card - memcpy(&select[1],resp,8); - ReaderTransmitIClass(select, sizeof(select)); - - if(ReaderReceiveIClass(resp) == 10) { - Dbprintf(" Selected CSN: %02x %02x %02x %02x %02x %02x %02x %02x", - resp[0], resp[1], resp[2], - resp[3], resp[4], resp[5], - resp[6], resp[7]); - } - // Card selected - Dbprintf("Readcheck on Sector 2"); - ReaderTransmitIClass(readcheck_cc, sizeof(readcheck_cc)); - if(ReaderReceiveIClass(resp) == 8) { - Dbprintf(" CC: %02x %02x %02x %02x %02x %02x %02x %02x", - resp[0], resp[1], resp[2], - resp[3], resp[4], resp[5], - resp[6], resp[7]); - }else return; - Dbprintf("Authenticate"); - //for now replay captured auth (as cc not updated) - memcpy(check+5,MAC,4); - Dbprintf(" AA: %02x %02x %02x %02x", - check[5], check[6], check[7],check[8]); - ReaderTransmitIClass(check, sizeof(check)); - if(ReaderReceiveIClass(resp) == 4) { - Dbprintf(" AR: %02x %02x %02x %02x", - resp[0], resp[1], resp[2],resp[3]); - }else { - Dbprintf("Error: Authentication Fail!"); - return; - } - Dbprintf("Write Block"); - - //read configuration for max block number - read_success=false; - read[1]=1; - uint8_t *blockno=&read[1]; - crc = iclass_crc16((char *)blockno,1); - read[2] = crc >> 8; - read[3] = crc & 0xff; - while(!read_success){ - ReaderTransmitIClass(read, sizeof(read)); - if(ReaderReceiveIClass(resp) == 10) { - read_success=true; - mem=resp[5]; - memory.k16= (mem & 0x80); - memory.book= (mem & 0x20); - memory.k2= (mem & 0x8); - memory.lockauth= (mem & 0x2); - memory.keyaccess= (mem & 0x1); - - } - } - if (memory.k16){ - cardsize=255; - }else cardsize=32; - //check card_size - - memcpy(write+1,blockNo,1); - memcpy(write+2,data,8); - memcpy(write+10,mac,4); - while(!send_success){ - ReaderTransmitIClass(write, sizeof(write)); - if(ReaderReceiveIClass(resp) == 10) { - write_success=true; - } - }// + memcpy(dataout + (blkCnt*8), readblockdata, 8); + } + //return pointer to dump memory in arg3 + cmd_send(CMD_ACK, isOK, blkCnt, BigBuf_max_traceLen(), 0, 0); + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); + LEDsoff(); + BigBuf_free(); +} + +static bool iClass_WriteBlock_ext(uint8_t blockNo, uint8_t *data) { + uint8_t write[] = { ICLASS_CMD_UPDATE, blockNo, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; + //uint8_t readblockdata[10]; + //write[1] = blockNo; + memcpy(write+2, data, 12); // data + mac + char *wrCmd = (char *)(write+1); + uint16_t wrCrc = iclass_crc16(wrCmd, 13); + write[14] = wrCrc >> 8; + write[15] = wrCrc & 0xff; + uint8_t resp[] = {0,0,0,0,0,0,0,0,0,0}; + bool isOK = false; + + isOK = sendCmdGetResponseWithRetries(write, sizeof(write), resp, sizeof(resp), 10); + if (isOK) { //if reader responded correctly + //Dbprintf("WriteResp: %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",resp[0],resp[1],resp[2],resp[3],resp[4],resp[5],resp[6],resp[7],resp[8],resp[9]); + if (memcmp(write+2, resp, 8)) { //if response is not equal to write values + if (blockNo != 3 && blockNo != 4) { //if not programming key areas (note key blocks don't get programmed with actual key data it is xor data) + //error try again + isOK = sendCmdGetResponseWithRetries(write, sizeof(write), resp, sizeof(resp), 10); + } } - WDT_HIT(); } - - LED_A_OFF(); -}*/ + return isOK; +} + +void iClass_WriteBlock(uint8_t blockNo, uint8_t *data) { + bool isOK = iClass_WriteBlock_ext(blockNo, data); + if (isOK){ + Dbprintf("Write block [%02x] successful", blockNo); + } else { + Dbprintf("Write block [%02x] failed", blockNo); + } + cmd_send(CMD_ACK, isOK, 0, 0, 0, 0); + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); +} + +void iClass_Clone(uint8_t startblock, uint8_t endblock, uint8_t *data) { + int i; + int written = 0; + int total_block = (endblock - startblock) + 1; + for (i = 0; i < total_block; i++) { + // block number + if (iClass_WriteBlock_ext(i+startblock, data + (i*12))){ + Dbprintf("Write block [%02x] successful", i + startblock); + written++; + } else { + if (iClass_WriteBlock_ext(i+startblock, data + (i*12))){ + Dbprintf("Write block [%02x] successful", i + startblock); + written++; + } else { + Dbprintf("Write block [%02x] failed", i + startblock); + } + } + } + if (written == total_block) + Dbprintf("Clone complete"); + else + Dbprintf("Clone incomplete"); + + cmd_send(CMD_ACK, 1, 0, 0, 0, 0); + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); + LEDsoff(); +}