#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 */
-#define TAG_BIT_PERIOD 143 // 100us == 100 * 1.5 == 150ticks
+#define TAG_BIT_PERIOD 142 // 100us == 100 * 1.5 == 150ticks
#define TAG_FRAME_WAIT 495 // 330us from READER frame end to TAG frame start. 330 * 1.5 == 495
#define RWD_TIME_FUZZ 20 // rather generous 13us, since the peak detector + hysteresis fuzz quite a bit
# define OPEN_COIL HIGH(GPIO_SSC_DOUT);
#endif
-uint32_t sendFrameStop = 0;
-
// Pause pulse, off in 20us / 30ticks,
// ONE / ZERO bit pulse,
// one == 80us / 120ticks
/* Generate Keystream */
uint32_t get_key_stream(int skip, int count) {
- uint32_t key = 0;
+
int i;
// Use int to enlarge timer tc to 32bit
legic_prng_bc += prng_timer->TC_CV;
// reset the prng timer.
- ResetTimer(prng_timer);
/* If skip == -1, forward prng time based */
if(skip == -1) {
i = (count == 6) ? -1 : legic_read_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;
+ // log
+ //uint8_t cmdbytes[] = {bits, BYTEx(data, 0), BYTEx(data, 1), BYTEx(send, 0), BYTEx(send, 1), legic_prng_count()};
+ //LogTrace(cmdbytes, sizeof(cmdbytes), starttime, GET_TICKS, NULL, TRUE);
/* Generate KeyStream */
- for(i=0; i<count; i++) {
- key |= legic_prng_get_bit() << i;
- legic_prng_forward(1);
- }
- return key;
+ return legic_prng_get_bits(count);
}
/* Send a frame in tag mode, the FPGA must have been set up by
* LegicRfSimulate
*/
-void frame_send_tag(uint16_t response, uint8_t bits, uint8_t crypt) {
+void frame_send_tag(uint16_t response, uint8_t bits) {
+
+ uint16_t mask = 1;
+
/* Bitbang the response */
- LOW(GPIO_SSC_DOUT);
+ SHORT_COIL;
AT91C_BASE_PIOA->PIO_OER = GPIO_SSC_DOUT;
AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT;
- /* Use time to crypt frame */
- if(crypt) {
- legic_prng_forward(2); /* TAG_FRAME_WAIT -> shift by 2 */
- response ^= legic_prng_get_bits(bits);
- }
+ /* TAG_FRAME_WAIT -> shift by 2 */
+ legic_prng_forward(2);
+ response ^= legic_prng_get_bits(bits);
/* Wait for the frame start */
- WaitUS( TAG_FRAME_WAIT );
+ WaitTicks( TAG_FRAME_WAIT );
- uint8_t bit = 0;
- for(int i = 0; i < bits; i++) {
-
- bit = response & 1;
- response >>= 1;
-
- if (bit)
- HIGH(GPIO_SSC_DOUT);
+ for (; mask < BITMASK(bits); mask <<= 1) {
+ if (response & mask)
+ OPEN_COIL;
else
- LOW(GPIO_SSC_DOUT);
-
- WaitUS(100);
+ SHORT_COIL;
+ WaitTicks(TAG_BIT_PERIOD);
}
- LOW(GPIO_SSC_DOUT);
+ SHORT_COIL;
}
/* Send a frame in reader mode, the FPGA must have been set up by
uint32_t starttime = GET_TICKS, send = 0;
uint16_t mask = 1;
- uint8_t prngstart = legic_prng_count() ;
// xor lsfr onto data.
send = data ^ legic_prng_get_bits(bits);
for (; mask < BITMASK(bits); mask <<= 1) {
- if (send & mask) {
+ if (send & mask)
COIL_PULSE(RWD_TIME_1);
- } else {
+ else
COIL_PULSE(RWD_TIME_0);
- }
}
// Final pause to mark the end of the frame
COIL_PULSE(0);
- sendFrameStop = GET_TICKS;
- uint8_t cmdbytes[] = {
- bits,
- BYTEx(data, 0),
- BYTEx(data, 1),
- BYTEx(send, 0),
- BYTEx(send, 1),
- prngstart,
- legic_prng_count()
- };
- LogTrace(cmdbytes, sizeof(cmdbytes), starttime, sendFrameStop, NULL, TRUE);
+ // log
+ uint8_t cmdbytes[] = {bits, BYTEx(data, 0), BYTEx(data, 1), BYTEx(send, 0), BYTEx(send, 1)};
+ LogTrace(cmdbytes, sizeof(cmdbytes), starttime, GET_TICKS, NULL, TRUE);
}
/* Receive a frame from the card in reader emulation mode, the FPGA and
*/
static void frame_receiveAsReader(struct legic_frame * const f, uint8_t bits) {
- frame_clean(f);
if ( bits > 32 ) return;
uint8_t i = bits, edges = 0;
- uint16_t lsfr = 0;
uint32_t the_bit = 1, next_bit_at = 0, data = 0;
+ uint32_t old_level = 0;
+ volatile uint32_t level = 0;
- int old_level = 0, level = 0;
-
+ frame_clean(f);
+
AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_DIN;
AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DIN;
// calibrate the prng.
legic_prng_forward(2);
- uint8_t prngstart = legic_prng_count() ;
- data = lsfr = legic_prng_get_bits(bits);
+ data = legic_prng_get_bits(bits);
//FIXED time between sending frame and now listening frame. 330us
- // 387 = 0x19 0001 1001
uint32_t starttime = GET_TICKS;
- //uint16_t mywait = TAG_FRAME_WAIT - (starttime - sendFrameStop);
- //uint16_t mywait = 495 - (starttime - sendFrameStop);
- if ( bits == 6) {
- //WaitTicks( 495 - 9 - 9 );
- WaitTicks( 475 );
- } else {
- //Dbprintf("x WAIT %d", mywait );
- //WaitTicks( mywait );
- WaitTicks( 450 );
- }
+ // its about 9+9 ticks delay from end-send to here.
+ WaitTicks( 477 );
- next_bit_at = GET_TICKS + TAG_BIT_PERIOD;
+ next_bit_at = GET_TICKS + TAG_BIT_PERIOD;
while ( i-- ){
edges = 0;
next_bit_at += TAG_BIT_PERIOD;
- // We expect 42 edges == ONE
- //if (edges > 20 && edges < 64)
+ // We expect 42 edges (ONE)
if ( edges > 20 )
data ^= the_bit;
f->data = data;
f->bits = bits;
- uint8_t cmdbytes[] = {
- bits,
- BYTEx(data, 0),
- BYTEx(data, 1),
- BYTEx(data, 0) ^ BYTEx(lsfr, 0),
- BYTEx(data, 1) ^ BYTEx(lsfr, 1),
- prngstart,
- legic_prng_count()
- };
+ // log
+ uint8_t cmdbytes[] = {bits, BYTEx(data, 0), BYTEx(data, 1)};
LogTrace(cmdbytes, sizeof(cmdbytes), starttime, GET_TICKS, NULL, FALSE);
}
// Switch on carrier and let the tag charge for 1ms
HIGH(GPIO_SSC_DOUT);
- WaitUS(1000);
+ WaitUS(5000);
ResetTicks();
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);
+ cardmem = BigBuf_get_EM_addr();
memset(cardmem, 0x00, LEGIC_CARD_MEMSIZE);
clear_trace();
}
// calculate crc4 for a legic READ command
-// 5,8,10 address size.
-static uint32_t legic4Crc(uint8_t legicCmd, uint16_t byte_index, uint8_t value, uint8_t cmd_sz) {
+static uint32_t legic4Crc(uint8_t cmd, uint16_t byte_index, uint8_t value, uint8_t cmd_sz) {
crc_clear(&legic_crc);
- //uint32_t temp = (value << cmd_sz) | (byte_index << 1) | legicCmd;
- //crc_update(&legic_crc, temp, cmd_sz + 8 );
- crc_update(&legic_crc, 1, 1); /* CMD_READ */
- crc_update(&legic_crc, byte_index, cmd_sz-1);
- crc_update(&legic_crc, value, 8);
+ uint32_t temp = (value << cmd_sz) | (byte_index << 1) | cmd;
+ crc_update(&legic_crc, temp, cmd_sz + 8 );
return crc_finish(&legic_crc);
}
-int legic_read_byte(int byte_index, int cmd_sz) {
+int legic_read_byte( uint16_t index, uint8_t cmd_sz) {
- uint8_t byte = 0; //, crc = 0, calcCrc = 0;
- uint32_t cmd = (byte_index << 1) | LEGIC_READ;
+ uint8_t byte, crc, calcCrc = 0;
+ uint32_t cmd = (index << 1) | LEGIC_READ;
- // (us)| ticks
- // -------------
- // 330 | 495
- // 244 | 366
- WaitTicks(366);
+ // 90ticks = 60us (should be 100us but crc calc takes time.)
+ //WaitTicks(330); // 330ticks prng(4) - works
+ WaitTicks(240); // 240ticks prng(3) - works
frame_sendAsReader(cmd, cmd_sz);
frame_receiveAsReader(¤t_frame, 12);
+ // CRC check.
byte = BYTEx(current_frame.data, 0);
+ crc = BYTEx(current_frame.data, 1);
+ calcCrc = legic4Crc(LEGIC_READ, index, byte, cmd_sz);
- // calcCrc = legic4Crc(LEGIC_READ, byte_index, byte, cmd_sz);
- // crc = BYTEx(current_frame.data, 1);
-
- // if( calcCrc != crc ) {
- // Dbprintf("!!! crc mismatch: expected %x but got %x !!!", calcCrc, crc);
- // return -1;
- // }
+ if( calcCrc != crc ) {
+ Dbprintf("!!! crc mismatch: expected %x but got %x !!!", calcCrc, crc);
+ return -1;
+ }
- legic_prng_forward(4);
- WaitTicks(40);
+ legic_prng_forward(3);
return byte;
}
crc_update(&legic_crc, addr, addr_sz);
crc_update(&legic_crc, byte, 8);
uint32_t crc = crc_finish(&legic_crc);
-
uint32_t crc2 = legic4Crc(LEGIC_WRITE, addr, byte, addr_sz+1);
- if ( crc != crc2 )
+ if ( crc != crc2 ) {
Dbprintf("crc is missmatch");
-
+ return 1;
+ }
// send write command
uint32_t cmd = ((crc <<(addr_sz+1+8)) //CRC
|(byte <<(addr_sz+1)) //Data
uint32_t cmd_sz = addr_sz+1+8+4; //crc+data+cmd
- legic_prng_forward(2); /* we wait anyways */
+ legic_prng_forward(2);
- WaitUS(TAG_FRAME_WAIT);
+ WaitTicks(330);
frame_sendAsReader(cmd, cmd_sz);
-
- // wllm-rbnt doesnt have these
+
AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_DIN;
AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DIN;
int t, old_level = 0, edges = 0;
int next_bit_at = 0;
- WaitUS(TAG_FRAME_WAIT);
+ WaitTicks(TAG_FRAME_WAIT);
for( t = 0; t < 80; ++t) {
edges = 0;
next_bit_at += TAG_BIT_PERIOD;
while(timer->TC_CV < next_bit_at) {
- int level = (AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_DIN);
+ volatile uint32_t level = (AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_DIN);
if(level != old_level)
edges++;
old_level = level;
}
- if(edges > 20 && edges < 60) { /* expected are 42 edges */
+ if(edges > 20 ) { /* expected are 42 edges */
int t = timer->TC_CV;
int c = t / TAG_BIT_PERIOD;
return -1;
}
-int LegicRfReader(int offset, int bytes, int iv) {
+int LegicRfReader(uint16_t offset, uint16_t len, uint8_t iv) {
- uint16_t byte_index = 0;
+ uint16_t i = 0;
uint8_t isOK = 1;
legic_card_select_t card;
LegicCommonInit();
- if ( legic_select_card(&card) ) {
+ if ( legic_select_card_iv(&card, iv) ) {
isOK = 0;
goto OUT;
}
-
+
switch_off_tag_rwd();
-
- if (bytes == -1)
- bytes = card.cardsize;
- if (bytes + offset >= card.cardsize)
- bytes = card.cardsize - offset;
+ if (len + offset >= card.cardsize)
+ len = card.cardsize - offset;
- // Start setup and read bytes.
setup_phase_reader(iv);
LED_B_ON();
- while (byte_index < bytes) {
- int r = legic_read_byte(byte_index + offset, card.cmdsize);
+ while (i < len) {
+ int r = legic_read_byte(offset + i, card.cmdsize);
if (r == -1 || BUTTON_PRESS()) {
- if ( MF_DBGLEVEL >= 3) DbpString("operation aborted");
+ if ( MF_DBGLEVEL >= 2) DbpString("operation aborted");
isOK = 0;
goto OUT;
}
- cardmem[byte_index++] = r;
+ cardmem[i++] = r;
WDT_HIT();
}
WDT_HIT();
switch_off_tag_rwd();
LEDsoff();
- uint8_t len = (bytes & 0x3FF);
- cmd_send(CMD_ACK,isOK,len,0,cardmem,len);
+ cmd_send(CMD_ACK, isOK, len, 0, cardmem, len);
return 0;
}
return 0;
}*/
-void LegicRfWriter(int offset, int bytes, int iv) {
-
- int byte_index = 0, addr_sz = 0;
+void LegicRfWriter(uint16_t offset, uint16_t bytes, uint8_t iv) {
- LegicCommonInit();
+ int byte_index = 0;
+ uint8_t isOK = 1;
+ legic_card_select_t card;
- if ( MF_DBGLEVEL >= 2) DbpString("setting up legic card");
+ LegicCommonInit();
- uint32_t tag_type = setup_phase_reader(iv);
+ if ( legic_select_card_iv(&card, iv) ) {
+ isOK = 0;
+ goto OUT;
+ }
switch_off_tag_rwd();
- switch(tag_type) {
+ switch(card.tagtype) {
case 0x0d:
if(offset+bytes > 22) {
Dbprintf("Error: can not write to 0x%03.3x on MIM22", offset + bytes);
return;
}
- addr_sz = 5;
if ( MF_DBGLEVEL >= 2) Dbprintf("MIM22 card found, writing 0x%02.2x - 0x%02.2x ...", offset, offset + bytes);
break;
case 0x1d:
Dbprintf("Error: can not write to 0x%03.3x on MIM256", offset + bytes);
return;
}
- addr_sz = 8;
if ( MF_DBGLEVEL >= 2) Dbprintf("MIM256 card found, writing 0x%02.2x - 0x%02.2x ...", offset, offset + bytes);
break;
case 0x3d:
Dbprintf("Error: can not write to 0x%03.3x on MIM1024", offset + bytes);
return;
}
- addr_sz = 10;
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;
}
LED_B_ON();
setup_phase_reader(iv);
+
int r = 0;
while(byte_index < bytes) {
//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(cardmem[(0x06-byte_index)], (0x06-byte_index), addr_sz);
+ r = legic_write_byte(cardmem[(0x06-byte_index)], (0x06-byte_index), card.addrsize);
- // write second byte on success...
+ // write second byte on success
if(r == 0) {
byte_index++;
- r = legic_write_byte(cardmem[(0x06-byte_index)], (0x06-byte_index), addr_sz);
+ r = legic_write_byte(cardmem[(0x06-byte_index)], (0x06-byte_index), card.addrsize);
}
}
else {
- r = legic_write_byte(cardmem[byte_index+offset], byte_index+offset, addr_sz);
+ r = legic_write_byte(cardmem[byte_index+offset], byte_index+offset, card.addrsize);
}
if ((r != 0) || BUTTON_PRESS()) {
Dbprintf("operation aborted @ 0x%03.3x", byte_index);
- switch_off_tag_rwd();
- LEDsoff();
- return;
+ isOK = 0;
+ goto OUT;
}
WDT_HIT();
byte_index++;
}
- LEDsoff();
- if ( MF_DBGLEVEL >= 1) DbpString("write successful");
+
+OUT:
+ cmd_send(CMD_ACK, isOK, 0,0,0,0);
+ switch_off_tag_rwd();
+ LEDsoff();
}
-void LegicRfRawWriter(int address, int byte, int iv) {
+void LegicRfRawWriter(int address, int byte, uint8_t iv) {
int byte_index = 0, addr_sz = 0;
if ( MF_DBGLEVEL >= 1) DbpString("write successful");
}
-int legic_select_card(legic_card_select_t *p_card){
+int legic_select_card_iv(legic_card_select_t *p_card, uint8_t iv){
if ( p_card == NULL ) return 1;
- p_card->tagtype = setup_phase_reader(0x1);
+ p_card->tagtype = setup_phase_reader(iv);
switch(p_card->tagtype) {
case 0x0d:
p_card->cmdsize = 6;
+ p_card->addrsize = 5;
p_card->cardsize = 22;
break;
case 0x1d:
p_card->cmdsize = 9;
+ p_card->addrsize = 8;
p_card->cardsize = 256;
break;
case 0x3d:
p_card->cmdsize = 11;
+ p_card->addrsize = 10;
p_card->cardsize = 1024;
break;
default:
p_card->cmdsize = 0;
+ p_card->addrsize = 0;
p_card->cardsize = 0;
return 2;
- break;
}
return 0;
}
+int legic_select_card(legic_card_select_t *p_card){
+ return legic_select_card_iv(p_card, 0x01);
+}
void LegicRfInfo(void){
legic_card_select_t *card = (legic_card_select_t*) buf;
LegicCommonInit();
-
+
if ( legic_select_card(card) ) {
cmd_send(CMD_ACK,0,0,0,0,0);
goto OUT;
}
- // read UID bytes.
+ // read UID bytes
for ( uint8_t i = 0; i < sizeof(card->uid); ++i) {
int r = legic_read_byte(i, card->cmdsize);
if ( r == -1 ) {
card->uid[i] = r & 0xFF;
}
- cmd_send(CMD_ACK, 1 ,0 , 0, buf, sizeof(legic_card_select_t));
-
+ cmd_send(CMD_ACK, 1, 0, 0, buf, sizeof(legic_card_select_t));
+
OUT:
switch_off_tag_rwd();
LEDsoff();
{
uint8_t *BigBuf = BigBuf_get_addr();
- /* First Part of Handshake (IV) */
- if(f->bits == 7) {
+ /* First Part of Handshake (IV) */
+ if(f->bits == 7) {
+
+ LED_C_ON();
- LED_C_ON();
-
// Reset prng timer
ResetTimer(prng_timer);
-
- legic_prng_init(f->data);
- frame_send_tag(0x3d, 6, 1); /* 0x3d^0x26 = 0x1B */
- legic_state = STATE_IV;
- legic_read_count = 0;
- legic_prng_bc = 0;
- legic_prng_iv = f->data;
-
-
+
+ legic_prng_init(f->data);
+ frame_send_tag(0x3d, 6); /* 0x3d^0x26 = 0x1B */
+ legic_state = STATE_IV;
+ legic_read_count = 0;
+ legic_prng_bc = 0;
+ legic_prng_iv = f->data;
+
+
ResetTimer(timer);
WaitUS(280);
- return;
- }
+ return;
+ }
/* 0x19==??? */
if(legic_state == STATE_IV) {
//Dbprintf("Data:%03.3x, key:%03.3x, addr: %03.3x, read_c:%u", f->data, key, addr, read_c);
legic_prng_forward(legic_reqresp_drift);
- frame_send_tag(hash | data, 12, 1);
+ frame_send_tag(hash | data, 12);
ResetTimer(timer);
legic_prng_forward(2);
projects / proxmark3-svn / blobdiff