X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/cc70889743ed9b2820713e2a912ec030f2a496bb..f7b4257301e2ff4b490ae84d0b8ecbe3c7dfe241:/armsrc/legicrf.c diff --git a/armsrc/legicrf.c b/armsrc/legicrf.c index 26863d71..1596c50c 100644 --- a/armsrc/legicrf.c +++ b/armsrc/legicrf.c @@ -8,14 +8,7 @@ // LEGIC RF simulation code //----------------------------------------------------------------------------- -#include "proxmark3.h" -#include "apps.h" -#include "util.h" -#include "string.h" - #include "legicrf.h" -#include "legic_prng.h" -#include "crc.h" static struct legic_frame { int bits; @@ -37,11 +30,12 @@ static int legic_phase_drift; static int legic_frame_drift; static int legic_reqresp_drift; +int timestamp; + AT91PS_TC timer; AT91PS_TC prng_timer; -static void setup_timer(void) -{ +static void setup_timer(void) { /* Set up Timer 1 to use for measuring time between pulses. Since we're bit-banging * this it won't be terribly accurate but should be good enough. */ @@ -68,7 +62,7 @@ static void setup_timer(void) #define RWD_TIME_PAUSE 30 /* 20us */ #define RWD_TIME_FUZZ 20 /* rather generous 13us, since the peak detector + hysteresis fuzz quite a bit */ #define TAG_TIME_BIT 150 /* 100us for every bit */ -#define TAG_TIME_WAIT 490 /* time from RWD frame end to tag frame start, experimentally determined */ +#define TAG_TIME_WAIT 490 /* 490 time from RWD frame end to tag frame start, experimentally determined */ #define SIM_DIVISOR 586 /* prng_time/SIM_DIVISOR count prng needs to be forwared */ #define SIM_SHIFT 900 /* prng_time+SIM_SHIFT shift of delayed start */ @@ -78,35 +72,59 @@ static void setup_timer(void) #define FUZZ_EQUAL(value, target, fuzz) ((value) > ((target)-(fuzz)) && (value) < ((target)+(fuzz))) +// ~ 258us + 100us*delay +#define WAIT_387 WAIT(387) +#define WAIT(delay) while(timer->TC_CV < (delay) ); + + +// ToDo: define a meaningful maximum size for auth_table. The bigger this is, the lower will be the available memory for traces. +// Historically it used to be FREE_BUFFER_SIZE, which was 2744. +#define LEGIC_CARD_MEMSIZE 1024 +static uint8_t* cardmem; + +/* +The new tracelog.. + // Traceformat: + // 32 bits timestamp (little endian) + // 16 bits duration (little endian) + // 16 bits data length (little endian, Highest Bit used as readerToTag flag) + // y Bytes data + // x Bytes parity (one byte per 8 bytes data) +*/ + /* Generate Keystream */ static uint32_t get_key_stream(int skip, int count) { - uint32_t key=0; int i; + uint32_t key = 0; + int i; - /* Use int to enlarge timer tc to 32bit */ + // Use int to enlarge timer tc to 32bit legic_prng_bc += prng_timer->TC_CV; + + // reset the prng timer. prng_timer->TC_CCR = AT91C_TC_SWTRG; + while(prng_timer->TC_CV > 1) ; /* If skip == -1, forward prng time based */ if(skip == -1) { - i = (legic_prng_bc+SIM_SHIFT)/SIM_DIVISOR; /* Calculate Cycles based on timer */ + i = (legic_prng_bc + SIM_SHIFT)/SIM_DIVISOR; /* Calculate Cycles based on timer */ i -= legic_prng_count(); /* substract cycles of finished frames */ - i -= count; /* substract current frame length, rewidn to bedinning */ + i -= count; /* substract current frame length, rewind to beginning */ legic_prng_forward(i); } else { legic_prng_forward(skip); } - /* Write Time Data into LOG */ - uint8_t *BigBuf = BigBuf_get_addr(); i = (count == 6) ? -1 : legic_read_count; - BigBuf[OFFSET_LOG+128+i] = legic_prng_count(); - BigBuf[OFFSET_LOG+256+i*4] = (legic_prng_bc >> 0) & 0xff; - BigBuf[OFFSET_LOG+256+i*4+1] = (legic_prng_bc >> 8) & 0xff; - BigBuf[OFFSET_LOG+256+i*4+2] = (legic_prng_bc >>16) & 0xff; - BigBuf[OFFSET_LOG+256+i*4+3] = (legic_prng_bc >>24) & 0xff; - BigBuf[OFFSET_LOG+384+i] = count; + /* Write Time Data into LOG */ + // uint8_t *BigBuf = BigBuf_get_addr(); + // BigBuf[OFFSET_LOG+128+i] = legic_prng_count(); + // BigBuf[OFFSET_LOG+256+i*4] = (legic_prng_bc >> 0) & 0xff; + // BigBuf[OFFSET_LOG+256+i*4+1] = (legic_prng_bc >> 8) & 0xff; + // BigBuf[OFFSET_LOG+256+i*4+2] = (legic_prng_bc >>16) & 0xff; + // BigBuf[OFFSET_LOG+256+i*4+3] = (legic_prng_bc >>24) & 0xff; + // BigBuf[OFFSET_LOG+384+i] = count; /* Generate KeyStream */ for(i=0; i shift by 2 */ - int i; int key = 0; - for(i=0; iTC_CV < (TAG_TIME_WAIT - 30)) ; - - int i; - for(i=0; iTC_CV < (TAG_TIME_WAIT - 30)) ; + WAIT( TAG_TIME_WAIT - 30) + + uint8_t bit = 0; + for(int i = 0; i < bits; i++) { int nextbit = timer->TC_CV + TAG_TIME_BIT; - int bit = response & 1; - response = response >> 1; - if(bit) + bit = response & 1; + response >>= 1; + + if (bit) AT91C_BASE_PIOA->PIO_SODR = GPIO_SSC_DOUT; else AT91C_BASE_PIOA->PIO_CODR = GPIO_SSC_DOUT; - while(timer->TC_CV < nextbit) ; + //while(timer->TC_CV < nextbit) ; + WAIT(nextbit) } AT91C_BASE_PIOA->PIO_CODR = GPIO_SSC_DOUT; } +// Starts Clock and waits until its reset +static void ResetClock(void){ + timer->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG; + while(timer->TC_CV > 1) ; +} + /* Send a frame in reader mode, the FPGA must have been set up by * LegicRfReader */ -static void frame_send_rwd(uint32_t data, int bits) -{ - /* Start clock */ - timer->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG; - while(timer->TC_CV > 1) ; /* Wait till the clock has reset */ +static void frame_send_rwd(uint32_t data, uint8_t bits){ - int i; - for(i=0; iTC_CV; - int pause_end = starttime + RWD_TIME_PAUSE, bit_end; - int bit = data & 1; - data = data >> 1; + uint8_t bit = 0; + uint32_t starttime = 0, pause_end = 0, bit_end = 0, temp = data; + ResetClock(); + + for(int i = 0; i < bits; i++) { + + starttime = timer->TC_CV; + pause_end = starttime + RWD_TIME_PAUSE; + bit = temp & 1; + temp >>= 1; if(bit ^ legic_prng_get_bit()) bit_end = starttime + RWD_TIME_1; else bit_end = starttime + RWD_TIME_0; - /* RWD_TIME_PAUSE time off, then some time on, so that the complete bit time is * RWD_TIME_x, where x is the bit to be transmitted */ AT91C_BASE_PIOA->PIO_CODR = GPIO_SSC_DOUT; - while(timer->TC_CV < pause_end) ; + + WAIT( pause_end ) + AT91C_BASE_PIOA->PIO_SODR = GPIO_SSC_DOUT; - legic_prng_forward(1); /* bit duration is longest. use this time to forward the lfsr */ - while(timer->TC_CV < bit_end); + // bit duration is longest. use this time to forward the lfsr + legic_prng_forward(1); + + WAIT( bit_end ) } - /* One final pause to mark the end of the frame */ - int pause_end = timer->TC_CV + RWD_TIME_PAUSE; + // One final pause to mark the end of the frame + pause_end = timer->TC_CV + RWD_TIME_PAUSE; + AT91C_BASE_PIOA->PIO_CODR = GPIO_SSC_DOUT; - while(timer->TC_CV < pause_end) ; + + WAIT(pause_end) + AT91C_BASE_PIOA->PIO_SODR = GPIO_SSC_DOUT; - + // log + uint8_t cmdbytes[2] = { (data & 0xFF), 0 }; + if ( bits > 8 ) { + cmdbytes[1] = (data >> 8 ) & 0xFF; + LogTrace(cmdbytes, 2, 0, timer->TC_CV, NULL, TRUE); + } else { + LogTrace(cmdbytes, 1, 0, timer->TC_CV, NULL, TRUE); + } /* Reset the timer, to measure time until the start of the tag frame */ - timer->TC_CCR = AT91C_TC_SWTRG; - while(timer->TC_CV > 1) ; /* Wait till the clock has reset */ + ResetClock(); } /* Receive a frame from the card in reader emulation mode, the FPGA and @@ -223,14 +261,15 @@ static void frame_send_rwd(uint32_t data, int bits) */ static void frame_receive_rwd(struct legic_frame * const f, int bits, int crypt) { - uint32_t the_bit = 1; /* Use a bitmask to save on shifts */ - uint32_t data=0; - int i, old_level=0, edges=0; + uint32_t starttime = timer->TC_CV; + + uint32_t the_bit = 1; + uint32_t data = 0;/* Use a bitmask to save on shifts */ + int i, old_level = 0, edges = 0; int next_bit_at = TAG_TIME_WAIT; + int level = 0; - if(bits > 32) { - bits = 32; - } + if(bits > 32) bits = 32; AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_DIN; AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DIN; @@ -246,21 +285,23 @@ static void frame_receive_rwd(struct legic_frame * const f, int bits, int crypt) } } - while(timer->TC_CV < next_bit_at) ; + // QUESTION: how long did those extra calls to logtrace take? + WAIT(next_bit_at) next_bit_at += TAG_TIME_BIT; for(i=0; iTC_CV < next_bit_at) { - int level = (AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_DIN); + level = (AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_DIN); if(level != old_level) edges++; old_level = level; } next_bit_at += TAG_TIME_BIT; - if(edges > 20 && edges < 60) { /* expected are 42 edges */ + // We expect 42 edges + if(edges > 20 && edges < 60) { data ^= the_bit; } the_bit <<= 1; @@ -268,48 +309,65 @@ static void frame_receive_rwd(struct legic_frame * const f, int bits, int crypt) f->data = data; f->bits = bits; - - /* Reset the timer, to synchronize the next frame */ - timer->TC_CCR = AT91C_TC_SWTRG; - while(timer->TC_CV > 1) ; /* Wait till the clock has reset */ + + // log + uint8_t cmdbytes[] = { (data & 0xFF), (data >> 8) & 0xFF }; + LogTrace(cmdbytes, 2, starttime, timer->TC_CV, NULL, FALSE); + + // Reset the timer, to synchronize the next frame + ResetClock(); } -static void frame_append_bit(struct legic_frame * const f, int bit) -{ - if (f->bits >= 31) - return; /* Overflow, won't happen */ +static void frame_append_bit(struct legic_frame * const f, int bit) { + // Overflow, won't happen + if (f->bits >= 31) return; f->data |= (bit << f->bits); f->bits++; } -static void frame_clean(struct legic_frame * const f) -{ +static void frame_clean(struct legic_frame * const f) { f->data = 0; f->bits = 0; } -static uint32_t perform_setup_phase_rwd(int iv) -{ +// Setup pm3 as a Legic Reader +static uint32_t perform_setup_phase_rwd(uint8_t iv) { - /* Switch on carrier and let the tag charge for 1ms */ + // Switch on carrier and let the tag charge for 1ms AT91C_BASE_PIOA->PIO_SODR = GPIO_SSC_DOUT; - SpinDelay(1); + SpinDelay(20); // was 1ms before. + + // no keystream yet + legic_prng_init(0); - legic_prng_init(0); /* no keystream yet */ frame_send_rwd(iv, 7); + legic_prng_init(iv); frame_clean(¤t_frame); + frame_receive_rwd(¤t_frame, 6, 1); - legic_prng_forward(3); /* we wait anyways */ - while(timer->TC_CV < 387) ; /* ~ 258us */ - frame_send_rwd(0x39, 6); + + // we wait anyways + legic_prng_forward(3); + + WAIT(387) + + // Send obsfuscated acknowledgment frame. + // 0x19 = MIM22 + // 0x39 = MIM256, MIM1024 + if ( current_frame.data == 0x0D ){ + frame_send_rwd(0x19, 6); + }else{ + frame_send_rwd(0x39, 6); + } return current_frame.data; } static void LegicCommonInit(void) { + FpgaDownloadAndGo(FPGA_BITSTREAM_HF); SetAdcMuxFor(GPIO_MUXSEL_HIPKD); FpgaSetupSsc(); @@ -320,70 +378,87 @@ static void LegicCommonInit(void) { AT91C_BASE_PIOA->PIO_OER = GPIO_SSC_DOUT; AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT; + // reserve a cardmem, meaning we can use the tracelog function in bigbuff easier. + cardmem = BigBuf_malloc(LEGIC_CARD_MEMSIZE); + memset(cardmem, 0x00, LEGIC_CARD_MEMSIZE); + + clear_trace(); + set_tracing(TRUE); + setup_timer(); crc_init(&legic_crc, 4, 0x19 >> 1, 0x5, 0); } /* Switch off carrier, make sure tag is reset */ -static void switch_off_tag_rwd(void) -{ +static void switch_off_tag_rwd(void) { AT91C_BASE_PIOA->PIO_CODR = GPIO_SSC_DOUT; SpinDelay(10); WDT_HIT(); } -/* calculate crc for a legic command */ -static int LegicCRC(int byte_index, int value, int cmd_sz) { + +// calculate crc4 for a legic READ command +// 5,8,10 address size. +static int LegicCRC(uint16_t byte_index, uint8_t value, uint8_t cmd_sz) { crc_clear(&legic_crc); - crc_update(&legic_crc, 1, 1); /* CMD_READ */ + crc_update(&legic_crc, LEGIC_READ, 1); crc_update(&legic_crc, byte_index, cmd_sz-1); crc_update(&legic_crc, value, 8); return crc_finish(&legic_crc); } +#define LEGIC_READ 0x01 +#define LEGIC_WRITE 0x00 + int legic_read_byte(int byte_index, int cmd_sz) { - int byte; - while(timer->TC_CV < 387) ; /* ~ 258us + 100us*delay */ + int calcCrc = 0, crc = 0; + uint8_t byte = 0; + uint32_t cmd = (byte_index << 1) | LEGIC_READ; + + WAIT_387 + + // send read command + frame_send_rwd(cmd, cmd_sz); - frame_send_rwd(1 | (byte_index << 1), cmd_sz); frame_clean(¤t_frame); + // receive frame_receive_rwd(¤t_frame, 12, 1); byte = current_frame.data & 0xff; + calcCrc = LegicCRC(byte_index, byte, cmd_sz); + crc = (current_frame.data >> 8); - if( LegicCRC(byte_index, byte, cmd_sz) != (current_frame.data >> 8) ) { - Dbprintf("!!! crc mismatch: expected %x but got %x !!!", - LegicCRC(byte_index, current_frame.data & 0xff, cmd_sz), - current_frame.data >> 8); + if( calcCrc != crc ) { + Dbprintf("!!! crc mismatch: expected %x but got %x !!!", calcCrc, crc); return -1; } - legic_prng_forward(4); /* we wait anyways */ + // we wait anyways + legic_prng_forward(4); return byte; } -/* legic_write_byte() is not included, however it's trivial to implement - * and here are some hints on what remains to be done: - * - * * assemble a write_cmd_frame with crc and send it - * * wait until the tag sends back an ACK ('1' bit unencrypted) - * * forward the prng based on the timing +/* + * - assemble a write_cmd_frame with crc and send it + * - wait until the tag sends back an ACK ('1' bit unencrypted) + * - forward the prng based on the timing */ //int legic_write_byte(int byte, int addr, int addr_sz, int PrngCorrection) { int legic_write_byte(int byte, int addr, int addr_sz) { - //do not write UID, CRC - if(addr <= 0x04) { - return 0; - } - //== send write command ============================== + + //do not write UID, CRC at offset 0-4. + if(addr <= 0x04) return 0; + + // crc crc_clear(&legic_crc); crc_update(&legic_crc, 0, 1); /* CMD_WRITE */ crc_update(&legic_crc, addr, addr_sz); crc_update(&legic_crc, byte, 8); - uint32_t crc = crc_finish(&legic_crc); + + // send write command uint32_t cmd = ((crc <<(addr_sz+1+8)) //CRC |(byte <<(addr_sz+1)) //Data |(addr <<1) //Address @@ -391,17 +466,22 @@ int legic_write_byte(int byte, int addr, int addr_sz) { uint32_t cmd_sz = addr_sz+1+8+4; //crc+data+cmd legic_prng_forward(2); /* we wait anyways */ + while(timer->TC_CV < 387) ; /* ~ 258us */ + frame_send_rwd(cmd, cmd_sz); + +// wllm-rbnt doesnt have these +// AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_DIN; +// AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DIN; - AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_DIN; - AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DIN; + // wait for ack + int t, old_level = 0, edges = 0; + int next_bit_at = 0; - //== wait for ack ==================================== - int t, old_level=0, edges=0; - int next_bit_at =0; while(timer->TC_CV < 387) ; /* ~ 258us */ - for(t=0; t<80; t++) { + + for( t = 0; t < 80; t++) { edges = 0; next_bit_at += TAG_TIME_BIT; while(timer->TC_CV < next_bit_at) { @@ -413,15 +493,15 @@ int legic_write_byte(int byte, int addr, int addr_sz) { } if(edges > 20 && edges < 60) { /* expected are 42 edges */ int t = timer->TC_CV; - int c = t/TAG_TIME_BIT; - timer->TC_CCR = AT91C_TC_SWTRG; - while(timer->TC_CV > 1) ; /* Wait till the clock has reset */ + int c = t / TAG_TIME_BIT; + + ResetClock(); legic_prng_forward(c); return 0; } } - timer->TC_CCR = AT91C_TC_SWTRG; - while(timer->TC_CV > 1) ; /* Wait till the clock has reset */ + + ResetClock(); return -1; } @@ -430,44 +510,42 @@ int LegicRfReader(int offset, int bytes, int iv) { // ice_legic_setup(); // ice_legic_select_card(); // return 0; - - int byte_index=0, cmd_sz=0, card_sz=0; - - iv = (iv <= 0 ) ? SESSION_IV : iv; + int byte_index = 0, cmd_sz = 0, card_sz = 0; LegicCommonInit(); - uint8_t *BigBuf = BigBuf_get_addr(); - memset(BigBuf, 0, 1024); + if ( MF_DBGLEVEL >= 2) DbpString("setting up legic card"); - DbpString("setting up legic card"); uint32_t tag_type = perform_setup_phase_rwd(iv); - switch_off_tag_rwd(); //we lose to mutch time with dprintf + + //we lose to mutch time with dprintf + switch_off_tag_rwd(); + switch(tag_type) { case 0x0d: - DbpString("MIM22 card found, reading card ..."); + if ( MF_DBGLEVEL >= 2) DbpString("MIM22 card found, reading card ..."); cmd_sz = 6; card_sz = 22; break; case 0x1d: - DbpString("MIM256 card found, reading card ..."); + if ( MF_DBGLEVEL >= 2) DbpString("MIM256 card found, reading card ..."); cmd_sz = 9; card_sz = 256; break; case 0x3d: - DbpString("MIM1024 card found, reading card ..."); + if ( MF_DBGLEVEL >= 2) DbpString("MIM1024 card found, reading card ..."); cmd_sz = 11; card_sz = 1024; break; default: - Dbprintf("Unknown card format: %x",tag_type); + if ( MF_DBGLEVEL >= 1) Dbprintf("Unknown card format: %x",tag_type); return -1; } if(bytes == -1) bytes = card_sz; if(bytes+offset >= card_sz) - bytes = card_sz-offset; + bytes = card_sz - offset; perform_setup_phase_rwd(iv); @@ -476,23 +554,22 @@ int LegicRfReader(int offset, int bytes, int iv) { LED_B_ON(); while(byte_index < bytes) { int r = legic_read_byte(byte_index+offset, cmd_sz); - if(r == -1 ||BUTTON_PRESS()) { - DbpString("operation aborted"); - switch_off_tag_rwd(); - LED_B_OFF(); - LED_C_OFF(); - return -1; + if(r == -1 || BUTTON_PRESS()) { + switch_off_tag_rwd(); + LEDsoff(); + if ( MF_DBGLEVEL >= 2) DbpString("operation aborted"); + return -1; } - BigBuf[byte_index] = r; + cardmem[byte_index] = r; WDT_HIT(); - byte_index++; - if (byte_index & 0x10) LED_C_ON(); else LED_C_OFF(); + byte_index++; } - LED_B_OFF(); - LED_C_OFF(); + switch_off_tag_rwd(); - Dbprintf("Card read, use 'hf legic decode' or"); - Dbprintf("'data hexsamples %d' to view results", (bytes+7) & ~7); + LEDsoff(); + + if ( MF_DBGLEVEL >= 1) Dbprintf("Card read, use 'hf legic decode' or"); + if ( MF_DBGLEVEL >= 1) Dbprintf("'data hexsamples %d' to view results", (bytes+7) & ~7); return 0; } @@ -539,15 +616,18 @@ int LegicRfReader(int offset, int bytes, int iv) { void LegicRfWriter(int offset, int bytes, int iv) { - int byte_index=0, addr_sz=0; - uint8_t *BigBuf = BigBuf_get_addr(); + int byte_index = 0, addr_sz = 0; + iv = (iv <=0 ) ? SESSION_IV : iv; LegicCommonInit(); - DbpString("setting up legic card"); + if ( MF_DBGLEVEL >= 2) DbpString("setting up legic card"); + uint32_t tag_type = perform_setup_phase_rwd(iv); + switch_off_tag_rwd(); + switch(tag_type) { case 0x0d: if(offset+bytes > 22) { @@ -555,7 +635,7 @@ void LegicRfWriter(int offset, int bytes, int iv) { return; } addr_sz = 5; - Dbprintf("MIM22 card found, writing 0x%02.2x - 0x%02.2x ...", offset, offset+bytes); + if ( MF_DBGLEVEL >= 2) Dbprintf("MIM22 card found, writing 0x%02.2x - 0x%02.2x ...", offset, offset+bytes); break; case 0x1d: if(offset+bytes > 0x100) { @@ -563,7 +643,7 @@ void LegicRfWriter(int offset, int bytes, int iv) { return; } addr_sz = 8; - Dbprintf("MIM256 card found, writing 0x%02.2x - 0x%02.2x ...", offset, offset+bytes); + if ( MF_DBGLEVEL >= 2) Dbprintf("MIM256 card found, writing 0x%02.2x - 0x%02.2x ...", offset, offset+bytes); break; case 0x3d: if(offset+bytes > 0x400) { @@ -571,14 +651,13 @@ void LegicRfWriter(int offset, int bytes, int iv) { return; } addr_sz = 10; - Dbprintf("MIM1024 card found, writing 0x%03.3x - 0x%03.3x ...", offset, offset+bytes); + if ( MF_DBGLEVEL >= 2) Dbprintf("MIM1024 card found, writing 0x%03.3x - 0x%03.3x ...", offset, offset+bytes); break; default: Dbprintf("No or unknown card found, aborting"); return; } -#if 1 LED_B_ON(); perform_setup_phase_rwd(iv); while(byte_index < bytes) { @@ -587,53 +666,46 @@ void LegicRfWriter(int offset, int bytes, int iv) { //check if the DCF should be changed if ( ((byte_index+offset) == 0x05) && (bytes >= 0x02) ) { //write DCF in reverse order (addr 0x06 before 0x05) - r = legic_write_byte(BigBuf[(0x06-byte_index)], (0x06-byte_index), addr_sz); + r = legic_write_byte(cardmem[(0x06-byte_index)], (0x06-byte_index), addr_sz); // write second byte on success... if(r == 0) { byte_index++; - r = legic_write_byte(BigBuf[(0x06-byte_index)], (0x06-byte_index), addr_sz); + r = legic_write_byte(cardmem[(0x06-byte_index)], (0x06-byte_index), addr_sz); } } else { - r = legic_write_byte(BigBuf[byte_index+offset], byte_index+offset, addr_sz); + r = legic_write_byte(cardmem[byte_index+offset], byte_index+offset, addr_sz); } + if((r != 0) || BUTTON_PRESS()) { Dbprintf("operation aborted @ 0x%03.3x", byte_index); switch_off_tag_rwd(); - LED_B_OFF(); - LED_C_OFF(); + LEDsoff(); return; } WDT_HIT(); byte_index++; - if(byte_index & 0x10) LED_C_ON(); else LED_C_OFF(); - } - LED_B_OFF(); - LED_C_OFF(); - DbpString("write successful"); -#else - for(byte_index = -2; byte_index < 200; byte_index++) - { - Dbprintf("+ Try RndValue %d...", byte_index); - if(_LegicRfWriter(bytes, offset, addr_sz, BigBuf, byte_index) == 0) - break; } -#endif - + LEDsoff(); + if ( MF_DBGLEVEL >= 1) DbpString("write successful"); } void LegicRfRawWriter(int address, int byte, int iv) { - int byte_index=0, addr_sz=0; + + int byte_index = 0, addr_sz = 0; iv = (iv <= 0) ? SESSION_IV : iv; LegicCommonInit(); - DbpString("setting up legic card"); + if ( MF_DBGLEVEL >= 2) DbpString("setting up legic card"); + uint32_t tag_type = perform_setup_phase_rwd(iv); + switch_off_tag_rwd(); + switch(tag_type) { case 0x0d: if(address > 22) { @@ -641,7 +713,7 @@ void LegicRfRawWriter(int address, int byte, int iv) { return; } addr_sz = 5; - Dbprintf("MIM22 card found, writing at addr 0x%02.2x - value 0x%02.2x ...", address, byte); + if ( MF_DBGLEVEL >= 2) Dbprintf("MIM22 card found, writing at addr 0x%02.2x - value 0x%02.2x ...", address, byte); break; case 0x1d: if(address > 0x100) { @@ -649,7 +721,7 @@ void LegicRfRawWriter(int address, int byte, int iv) { return; } addr_sz = 8; - Dbprintf("MIM256 card found, writing at addr 0x%02.2x - value 0x%02.2x ...", address, byte); + if ( MF_DBGLEVEL >= 2) Dbprintf("MIM256 card found, writing at addr 0x%02.2x - value 0x%02.2x ...", address, byte); break; case 0x3d: if(address > 0x400) { @@ -657,14 +729,16 @@ void LegicRfRawWriter(int address, int byte, int iv) { return; } addr_sz = 10; - Dbprintf("MIM1024 card found, writing at addr 0x%03.3x - value 0x%03.3x ...", address, byte); + if ( MF_DBGLEVEL >= 2) Dbprintf("MIM1024 card found, writing at addr 0x%03.3x - value 0x%03.3x ...", address, byte); break; default: Dbprintf("No or unknown card found, aborting"); return; } + Dbprintf("integer value: %d address: %d addr_sz: %d", byte, address, addr_sz); LED_B_ON(); + perform_setup_phase_rwd(iv); //legic_prng_forward(2); @@ -673,28 +747,29 @@ void LegicRfRawWriter(int address, int byte, int iv) { if((r != 0) || BUTTON_PRESS()) { Dbprintf("operation aborted @ 0x%03.3x (%1d)", byte_index, r); switch_off_tag_rwd(); - LED_B_OFF(); - LED_C_OFF(); + LEDsoff(); return; } - - LED_B_OFF(); - LED_C_OFF(); - DbpString("write successful"); -} -int timestamp; + LEDsoff(); + if ( MF_DBGLEVEL >= 1) DbpString("write successful"); +} -/* Handle (whether to respond) a frame in tag mode */ +/* Handle (whether to respond) a frame in tag mode + * Only called when simulating a tag. + */ static void frame_handle_tag(struct legic_frame const * const f) { uint8_t *BigBuf = BigBuf_get_addr(); /* First Part of Handshake (IV) */ if(f->bits == 7) { -// if(f->data == SESSION_IV) { + LED_C_ON(); - prng_timer->TC_CCR = AT91C_TC_SWTRG; + + prng_timer->TC_CCR = AT91C_TC_SWTRG; + while(prng_timer->TC_CV > 1) ; + legic_prng_init(f->data); frame_send_tag(0x3d, 6, 1); /* 0x3d^0x26 = 0x1b */ legic_state = STATE_IV; @@ -703,16 +778,11 @@ static void frame_handle_tag(struct legic_frame const * const f) legic_prng_iv = f->data; /* TIMEOUT */ - timer->TC_CCR = AT91C_TC_SWTRG; - while(timer->TC_CV > 1); - while(timer->TC_CV < 280); + ResetClock(); + + //while(timer->TC_CV < 280); + WAIT(280) return; -// } else if((prng_timer->TC_CV % 50) > 40) { -// legic_prng_init(f->data); -// frame_send_tag(0x3d, 6, 1); -// SpinDelay(20); -// return; -// } } /* 0x19==??? */ @@ -723,9 +793,11 @@ static void frame_handle_tag(struct legic_frame const * const f) legic_state = STATE_CON; /* TIMEOUT */ - timer->TC_CCR = AT91C_TC_SWTRG; - while(timer->TC_CV > 1); - while(timer->TC_CV < 200); + ResetClock(); + + //while(timer->TC_CV < 200); + WAIT(200) + return; } else { legic_state = STATE_DISCON; @@ -750,11 +822,13 @@ static void frame_handle_tag(struct legic_frame const * const f) frame_send_tag(hash | data, 12, 1); - /* SHORT TIMEOUT */ - timer->TC_CCR = AT91C_TC_SWTRG; - while(timer->TC_CV > 1); + /* TIMEOUT */ + ResetClock(); + legic_prng_forward(2); - while(timer->TC_CV < 180); + //while(timer->TC_CV < 180); + WAIT(180) + return; } } @@ -803,21 +877,25 @@ static void frame_handle_tag(struct legic_frame const * const f) /* Read bit by bit untill full frame is received * Call to process frame end answer */ -static void emit(int bit) -{ - if(bit == -1) { - if(current_frame.bits <= 4) { - frame_clean(¤t_frame); - } else { - frame_handle_tag(¤t_frame); - frame_clean(¤t_frame); - } - WDT_HIT(); - } else if(bit == 0) { - frame_append_bit(¤t_frame, 0); - } else if(bit == 1) { - frame_append_bit(¤t_frame, 1); - } +static void emit(int bit) { + + switch (bit) { + case 1: + frame_append_bit(¤t_frame, 1); + break; + case 0: + frame_append_bit(¤t_frame, 0); + break; + default: + if(current_frame.bits <= 4) { + frame_clean(¤t_frame); + } else { + frame_handle_tag(¤t_frame); + frame_clean(¤t_frame); + } + WDT_HIT(); + break; + } } void LegicRfSimulate(int phase, int frame, int reqresp) @@ -833,83 +911,73 @@ void LegicRfSimulate(int phase, int frame, int reqresp) * seems to be 300us-ish. */ -// if(phase < 0) { -// int i; -// for(i=0; i<=reqresp; i++) { -// legic_prng_init(SESSION_IV); -// Dbprintf("i=%u, key 0x%3.3x", i, get_key_stream(i, frame)); -// } -// return; -// } - - legic_phase_drift = phase; - legic_frame_drift = frame; - legic_reqresp_drift = reqresp; - - FpgaDownloadAndGo(FPGA_BITSTREAM_HF); - SetAdcMuxFor(GPIO_MUXSEL_HIPKD); - FpgaSetupSsc(); - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_MODULATE_212K); - - /* Bitbang the receiver */ - AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_DIN; - AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DIN; - - setup_timer(); - crc_init(&legic_crc, 4, 0x19 >> 1, 0x5, 0); + legic_phase_drift = phase; + legic_frame_drift = frame; + legic_reqresp_drift = reqresp; + + FpgaDownloadAndGo(FPGA_BITSTREAM_HF); + SetAdcMuxFor(GPIO_MUXSEL_HIPKD); + FpgaSetupSsc(); + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_MODULATE_212K); + + /* Bitbang the receiver */ + AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_DIN; + AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DIN; + + setup_timer(); + crc_init(&legic_crc, 4, 0x19 >> 1, 0x5, 0); + + int old_level = 0; + int active = 0; + legic_state = STATE_DISCON; + + LED_B_ON(); + DbpString("Starting Legic emulator, press button to end"); - int old_level = 0; - int active = 0; - legic_state = STATE_DISCON; - - LED_B_ON(); - DbpString("Starting Legic emulator, press button to end"); - while(!BUTTON_PRESS() && !usb_poll_validate_length()) { - int level = !!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_DIN); - int time = timer->TC_CV; - - if(level != old_level) { - if(level == 1) { - timer->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG; - if(FUZZ_EQUAL(time, RWD_TIME_1, RWD_TIME_FUZZ)) { - /* 1 bit */ - emit(1); - active = 1; - LED_A_ON(); - } else if(FUZZ_EQUAL(time, RWD_TIME_0, RWD_TIME_FUZZ)) { - /* 0 bit */ - emit(0); - active = 1; - LED_A_ON(); - } else if(active) { - /* invalid */ - emit(-1); - active = 0; - LED_A_OFF(); - } - } - } + while(!BUTTON_PRESS() && !usb_poll_validate_length()) { + int level = !!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_DIN); + int time = timer->TC_CV; - if(time >= (RWD_TIME_1+RWD_TIME_FUZZ) && active) { - /* Frame end */ - emit(-1); - active = 0; - LED_A_OFF(); - } - - if(time >= (20*RWD_TIME_1) && (timer->TC_SR & AT91C_TC_CLKSTA)) { - timer->TC_CCR = AT91C_TC_CLKDIS; - } - - old_level = level; - WDT_HIT(); - } - DbpString("Stopped"); - LED_B_OFF(); - LED_A_OFF(); - LED_C_OFF(); -} + if(level != old_level) { + if(level == 1) { + timer->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG; + + if (FUZZ_EQUAL(time, RWD_TIME_1, RWD_TIME_FUZZ)) { + /* 1 bit */ + emit(1); + active = 1; + LED_A_ON(); + } else if (FUZZ_EQUAL(time, RWD_TIME_0, RWD_TIME_FUZZ)) { + /* 0 bit */ + emit(0); + active = 1; + LED_A_ON(); + } else if (active) { + /* invalid */ + emit(-1); + active = 0; + LED_A_OFF(); + } + } + } + + /* Frame end */ + if(time >= (RWD_TIME_1+RWD_TIME_FUZZ) && active) { + emit(-1); + active = 0; + LED_A_OFF(); + } + + if(time >= (20*RWD_TIME_1) && (timer->TC_SR & AT91C_TC_CLKSTA)) { + timer->TC_CCR = AT91C_TC_CLKDIS; + } + old_level = level; + WDT_HIT(); + } + if ( MF_DBGLEVEL >= 1) DbpString("Stopped"); + LEDsoff(); +} //----------------------------------------------------------------------------- //----------------------------------------------------------------------------- @@ -1147,18 +1215,16 @@ static struct { // } -static void UartReset() -{ - Uart.byteCntMax = MAX_FRAME_SIZE; +static void UartReset() { + Uart.byteCntMax = 3; Uart.state = STATE_UNSYNCD; Uart.byteCnt = 0; Uart.bitCnt = 0; Uart.posCnt = 0; - memset(Uart.output, 0x00, MAX_FRAME_SIZE); + memset(Uart.output, 0x00, 3); } -// static void UartInit(uint8_t *data) -// { +// static void UartInit(uint8_t *data) { // Uart.output = data; // UartReset(); // } @@ -1394,7 +1460,7 @@ static void DemodReset() { Demod.bitCount = 0; Demod.thisBit = 0; Demod.shiftReg = 0; - memset(Demod.output, 0x00, MAX_FRAME_SIZE); + memset(Demod.output, 0x00, 3); } static void DemodInit(uint8_t *data) { @@ -1654,7 +1720,7 @@ void ice_legic_setup() { // Signal field is on with the appropriate LED LED_D_ON(); FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_TX | FPGA_HF_READER_TX_SHALLOW_MOD); - SpinDelay(200); + SpinDelay(20); // Start the timer //StartCountSspClk();