*/
// At TIMER_CLOCK3 (MCK/32)
-// testing calculating in (us) microseconds.
+// testing calculating in ticks. 1.5ticks = 1us
#define RWD_TIME_1 120 // READER_TIME_PAUSE 20us off, 80us on = 100us 80 * 1.5 == 120ticks
#define RWD_TIME_0 60 // READER_TIME_PAUSE 20us off, 40us on = 60us 40 * 1.5 == 60ticks
#define RWD_TIME_PAUSE 30 // 20us == 20 * 1.5 == 30ticks */
AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT;
/* TAG_FRAME_WAIT -> shift by 2 */
- legic_prng_forward(2);
+ legic_prng_forward(3);
response ^= legic_prng_get_bits(bits);
/* Wait for the frame start */
// Setup pm3 as a Legic Reader
static uint32_t setup_phase_reader(uint8_t iv) {
- // Switch on carrier and let the tag charge for 1ms
+ // Switch on carrier and let the tag charge for 5ms
HIGH(GPIO_SSC_DOUT);
- WaitUS(5000);
+ WaitUS(5000);
ResetTicks();
- // no keystream yet
legic_prng_init(0);
// send IV handshake
frame_sendAsReader(iv, 7);
- // Now both tag and reader has same IV. Prng can start.
+ // tag and reader has same IV.
legic_prng_init(iv);
frame_receiveAsReader(¤t_frame, 6);
return current_frame.data;
}
-static void LegicCommonInit(void) {
+void LegicCommonInit(bool clear_mem) {
FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_TX);
// reserve a cardmem, meaning we can use the tracelog function in bigbuff easier.
cardmem = BigBuf_get_EM_addr();
- memset(cardmem, 0x00, LEGIC_CARD_MEMSIZE);
+ if ( clear_mem )
+ memset(cardmem, 0x00, LEGIC_CARD_MEMSIZE);
clear_trace();
set_tracing(TRUE);
uint8_t isOK = 1;
legic_card_select_t card;
- LegicCommonInit();
+ LegicCommonInit(TRUE);
if ( legic_select_card_iv(&card, iv) ) {
isOK = 0;
goto OUT;
}
- if (len + offset >= card.cardsize)
+ if (len + offset > card.cardsize)
len = card.cardsize - offset;
LED_B_ON();
void LegicRfWriter(uint16_t offset, uint16_t len, uint8_t iv, uint8_t *data) {
#define LOWERLIMIT 4
- uint8_t isOK = 1;
+ uint8_t isOK = 1, msg = 0;
legic_card_select_t card;
// uid NOT is writeable.
goto OUT;
}
- LegicCommonInit();
+ LegicCommonInit(TRUE);
if ( legic_select_card_iv(&card, iv) ) {
isOK = 0;
+ msg = 1;
goto OUT;
}
- if ( len + offset + LOWERLIMIT >= card.cardsize) {
- isOK = 0;
- goto OUT;
- }
+ if ( len + offset > card.cardsize)
+ len = card.cardsize - offset;
LED_B_ON();
while( len > 0 ) {
WDT_HIT();
}
OUT:
- cmd_send(CMD_ACK, isOK, 0,0,0,0);
+ cmd_send(CMD_ACK, isOK, msg,0,0,0);
switch_off_tag_rwd();
LEDsoff();
}
uint8_t buf[sizeof(legic_card_select_t)] = {0x00};
legic_card_select_t *card = (legic_card_select_t*) buf;
- LegicCommonInit();
+ LegicCommonInit(FALSE);
if ( legic_select_card(card) ) {
cmd_send(CMD_ACK,0,0,0,0,0);
// log
//uint8_t cmdbytes[] = {bits, BYTEx(data, 0), BYTEx(data, 1)};
//LogTrace(cmdbytes, sizeof(cmdbytes), starttime, GET_TICKS, NULL, FALSE);
-
- cardmem = BigBuf_get_EM_addr();
-
+ //Dbprintf("ICE: enter frame_handle_tag: %02x ", f->bits);
+
/* First Part of Handshake (IV) */
if(f->bits == 7) {
LED_C_ON();
// Reset prng timer
- ResetTimer(prng_timer);
+ //ResetTimer(prng_timer);
+ ResetTicks();
// IV from reader.
legic_prng_init(f->data);
+ Dbprintf("ICE: IV: %02x ", f->data);
+
// We should have three tagtypes with three different answers.
- frame_send_tag(0x3d, 6); /* 0x3d^0x26 = 0x1B */
+ legic_prng_forward(2);
+ //frame_send_tag(0x3d, 6); /* MIM1024 0x3d^0x26 = 0x1B */
+ frame_send_tag(0x1d, 6); // MIM256
legic_state = STATE_IV;
legic_read_count = 0;
legic_prng_bc = 0;
legic_prng_iv = f->data;
-
- ResetTimer(timer);
- WaitUS(280);
+ //ResetTimer(timer);
+ //WaitUS(280);
+ WaitTicks(388);
return;
}
legic_state = STATE_CON;
ResetTimer(timer);
- WaitUS(200);
+ WaitTicks(300);
return;
} else {
uint16_t addr = f->data ^ key;
addr >>= 1;
uint8_t data = cardmem[addr];
- int hash = legic4Crc(LEGIC_READ, addr, data, 11) << 8;
+
+ uint32_t crc = legic4Crc(LEGIC_READ, addr, data, 11) << 8;
- legic_read_count++;
- legic_prng_forward(legic_reqresp_drift);
+ //legic_read_count++;
+ //legic_prng_forward(legic_reqresp_drift);
- frame_send_tag(hash | data, 12);
- ResetTimer(timer);
+ frame_send_tag(crc | data, 12);
+ //ResetTimer(timer);
legic_prng_forward(2);
WaitTicks(330);
return;
}
/* Write */
- if(f->bits == 23) {
+ if (f->bits == 23 || f->bits == 21 ) {
uint32_t key = get_key_stream(-1, 23); //legic_frame_drift, 23);
uint16_t addr = f->data ^ key;
addr >>= 1;
legic_state = STATE_DISCON;
LED_C_OFF();
Dbprintf("write - addr: %x, data: %x", addr, data);
- // should send a ACK within 3.5ms too
+ // should send a ACK after 3.6ms
return;
}
Dbprintf("IV: %03.3x", legic_prng_iv);
}
- legic_state = STATE_DISCON;
- legic_read_count = 0;
- SpinDelay(10);
- LED_C_OFF();
- return;
+ legic_state = STATE_DISCON;
+ legic_read_count = 0;
+ WaitMS(10);
+ LED_C_OFF();
+ return;
}
/* Read bit by bit untill full frame is received
* measure the time between two rising edges on DIN, and no encoding on the
* subcarrier from card to reader, so we'll just shift out our verbatim data
* on DOUT, 1 bit is 100us. The time from reader to card frame is still unclear,
- * seems to be 300us-ish.
+ * seems to be 330us.
*/
int old_level = 0, active = 0;
+ volatile int32_t level = 0;
+
legic_state = STATE_DISCON;
-
legic_phase_drift = phase;
legic_frame_drift = frame;
legic_reqresp_drift = reqresp;
+
+ /* to get the stream of bits from FPGA in sim mode.*/
FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+ // Set up the synchronous serial port
+ //FpgaSetupSsc();
+ // connect Demodulated Signal to ADC:
SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_MODULATE_212K);
+ //FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_NO_MODULATION);
+ #define LEGIC_DMA_BUFFER 256
+ // The DMA buffer, used to stream samples from the FPGA
+ //uint8_t *dmaBuf = BigBuf_malloc(LEGIC_DMA_BUFFER);
+ //uint8_t *data = dmaBuf;
+ // Setup and start DMA.
+ // if ( !FpgaSetupSscDma((uint8_t*) dmaBuf, LEGIC_DMA_BUFFER) ){
+ // if (MF_DBGLEVEL > 1) Dbprintf("FpgaSetupSscDma failed. Exiting");
+ // return;
+ // }
+
+ //StartCountSspClk();
/* Bitbang the receiver */
- LINE_IN;
+ AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_DIN;
+ AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DIN;
// need a way to determine which tagtype we are simulating
LED_B_ON();
DbpString("Starting Legic emulator, press button to end");
-
+
+ /*
+ * The mode FPGA_HF_SIMULATOR_MODULATE_212K works like this.
+ * - A 1-bit input to the FPGA becomes 8 pulses on 212kHz (fc/64) (18.88us).
+ * - A 0-bit input 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
+ volatile uint8_t b;
+ uint8_t i = 0;
+ while( !BUTTON_PRESS() ) {
+ WDT_HIT();
+
+ // not sending anything.
+ if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
+ AT91C_BASE_SSC->SSC_THR = 0x00;
+ }
+
+ // receive
+ if ( AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY ) {
+ b = (uint8_t) AT91C_BASE_SSC->SSC_RHR;
+ bd[i] = b;
+ ++i;
+ // if(OutOfNDecoding(b & 0x0f))
+ // *len = Uart.byteCnt;
+ }
+
+ }
+ */
+
while(!BUTTON_PRESS() && !usb_poll_validate_length()) {
- volatile uint32_t level = !!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_DIN);
+
+ level = !!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_DIN);
uint32_t time = GET_TICKS;
if (level != old_level) {
-
- if (level) {
+ if (level == 1) {
- ResetTicks();
-
+ //Dbprintf("start, %u ", time);
+ StartTicks();
+ // did we get a signal
if (FUZZ_EQUAL(time, RWD_TIME_1, RWD_TIME_FUZZ)) {
- /* 1 bit */
+ // 1 bit
emit(1);
active = 1;
LED_A_ON();
} else if (FUZZ_EQUAL(time, RWD_TIME_0, RWD_TIME_FUZZ)) {
- /* 0 bit */
+ // 0 bit
emit(0);
active = 1;
LED_A_ON();
} else if (active) {
- /* invalid */
+ // invalid
emit(-1);
active = 0;
LED_A_OFF();
}
}
+
/* Frame end */
- if(time >= (RWD_TIME_1+RWD_TIME_FUZZ) && active) {
+ if(time >= (RWD_TIME_1 + RWD_TIME_FUZZ) && active) {
emit(-1);
active = 0;
LED_A_OFF();
* shutdown in its status register. Reading the SR has the
* side-effect of clearing any pending state in there.
*/
- if(time >= (20*RWD_TIME_1) && (timer->TC_SR & AT91C_TC_CLKSTA))
+ //if(time >= (20*RWD_TIME_1) && (timer->TC_SR & AT91C_TC_CLKSTA))
+ if(time >= (20 * RWD_TIME_1) )
StopTicks();
old_level = level;
WDT_HIT();
- }
+}
WDT_HIT();
+ DbpString("LEGIC Prime emulator stopped");
switch_off_tag_rwd();
+ FpgaDisableSscDma();
LEDsoff();
cmd_send(CMD_ACK, 1, 0, 0, 0, 0);
}
+
//-----------------------------------------------------------------------------
// Code up a string of octets at layer 2 (including CRC, we don't generate
// that here) so that they can be transmitted to the reader. Doesn't transmit
projects / proxmark3-svn / blobdiff