X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/00271f774add30ff49118351be9a80af85252d60..3e5b5bb2da079dae34dc42ff3947e2d9384f1992:/armsrc/legicrf.c
diff --git a/armsrc/legicrf.c b/armsrc/legicrf.c
index 9944ac46..f58cb442 100644
--- a/armsrc/legicrf.c
+++ b/armsrc/legicrf.c
@@ -1,5 +1,6 @@
//-----------------------------------------------------------------------------
// (c) 2009 Henryk Plötz <henryk@ploetzli.ch>
+// 2016 Iceman
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
@@ -68,7 +69,7 @@ static void setup_timer(void) {
*/
// 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 */
@@ -85,12 +86,14 @@ static void setup_timer(void) {
#define FUZZ_EQUAL(value, target, fuzz) ((value) > ((target)-(fuzz)) && (value) < ((target)+(fuzz)))
#ifndef SHORT_COIL
-# define SHORT_COIL LOW(GPIO_SSC_DOUT);
+# define SHORT_COIL LOW(GPIO_SSC_DOUT);
#endif
#ifndef OPEN_COIL
# define OPEN_COIL HIGH(GPIO_SSC_DOUT);
#endif
-
+#ifndef LINE_IN
+# define LINE_IN AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DIN;
+#endif
// Pause pulse, off in 20us / 30ticks,
// ONE / ZERO bit pulse,
// one == 80us / 120ticks
@@ -102,7 +105,7 @@ static void setup_timer(void) {
WaitTicks( (RWD_TIME_PAUSE) ); \
OPEN_COIL; \
WaitTicks((x)); \
- } while (0)
+ } while (0);
#endif
// ToDo: define a meaningful maximum size for auth_table. The bigger this is, the lower will be the available memory for traces.
@@ -160,10 +163,6 @@ uint32_t get_key_stream(int skip, int count) {
i = (count == 6) ? -1 : legic_read_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 */
return legic_prng_get_bits(count);
}
@@ -181,7 +180,7 @@ void frame_send_tag(uint16_t response, uint8_t bits) {
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 */
@@ -189,9 +188,9 @@ void frame_send_tag(uint16_t response, uint8_t bits) {
for (; mask < BITMASK(bits); mask <<= 1) {
if (response & mask)
- OPEN_COIL;
+ OPEN_COIL
else
- SHORT_COIL;
+ SHORT_COIL
WaitTicks(TAG_BIT_PERIOD);
}
SHORT_COIL;
@@ -202,24 +201,23 @@ void frame_send_tag(uint16_t response, uint8_t bits) {
*/
void frame_sendAsReader(uint32_t data, uint8_t bits){
- uint32_t starttime = GET_TICKS, send = 0;
- uint16_t mask = 1;
+ uint32_t starttime = GET_TICKS, send = 0, mask = 1;
// xor lsfr onto data.
send = data ^ legic_prng_get_bits(bits);
for (; mask < BITMASK(bits); mask <<= 1) {
if (send & mask)
- COIL_PULSE(RWD_TIME_1);
+ COIL_PULSE(RWD_TIME_1)
else
- COIL_PULSE(RWD_TIME_0);
+ COIL_PULSE(RWD_TIME_0)
}
// Final pause to mark the end of the frame
COIL_PULSE(0);
// log
- uint8_t cmdbytes[] = {bits, BYTEx(data, 0), BYTEx(data, 1), BYTEx(send, 0), BYTEx(send, 1)};
+ uint8_t cmdbytes[] = {bits, BYTEx(data,0), BYTEx(data,1), BYTEx(data,2), BYTEx(send,0), BYTEx(send,1), BYTEx(send,2)};
LogTrace(cmdbytes, sizeof(cmdbytes), starttime, GET_TICKS, NULL, TRUE);
}
@@ -254,9 +252,6 @@ static void frame_receiveAsReader(struct legic_frame * const f, uint8_t bits) {
volatile uint32_t 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);
@@ -302,19 +297,18 @@ static void frame_receiveAsReader(struct legic_frame * const f, uint8_t bits) {
// 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);
@@ -338,20 +332,22 @@ static uint32_t setup_phase_reader(uint8_t iv) {
return current_frame.data;
}
-static void LegicCommonInit(void) {
+void LegicCommonInit(bool clear_mem) {
FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_TX);
SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
/* Bitbang the transmitter */
- LOW(GPIO_SSC_DOUT);
+ SHORT_COIL;
AT91C_BASE_PIOA->PIO_OER = GPIO_SSC_DOUT;
AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT;
-
+ AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_DIN;
+
// 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);
@@ -362,7 +358,7 @@ static void LegicCommonInit(void) {
// Switch off carrier, make sure tag is reset
static void switch_off_tag_rwd(void) {
- LOW(GPIO_SSC_DOUT);
+ SHORT_COIL;
WaitUS(20);
WDT_HIT();
}
@@ -393,7 +389,7 @@ int legic_read_byte( uint16_t index, uint8_t cmd_sz) {
calcCrc = legic4Crc(LEGIC_READ, index, byte, cmd_sz);
if( calcCrc != crc ) {
- Dbprintf("!!! crc mismatch: expected %x but got %x !!!", calcCrc, crc);
+ Dbprintf("!!! crc mismatch: %x != %x !!!", calcCrc, crc);
return -1;
}
@@ -406,68 +402,66 @@ int legic_read_byte( uint16_t index, uint8_t cmd_sz) {
* - 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(uint8_t byte, uint16_t addr, uint8_t addr_sz) {
-
- //do not write UID, CRC at offset 0-4.
- if (addr <= 4) 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);
- uint32_t crc2 = legic4Crc(LEGIC_WRITE, addr, byte, addr_sz+1);
- if ( crc != crc2 ) {
- Dbprintf("crc is missmatch");
- return 1;
- }
+bool legic_write_byte(uint16_t index, uint8_t byte, uint8_t addr_sz) {
+
+ bool isOK = false;
+ int8_t i = 40;
+ uint8_t edges = 0;
+ uint8_t cmd_sz = addr_sz+1+8+4; //crc+data+cmd;
+ uint32_t steps = 0, next_bit_at, start, crc, old_level = 0;
+
+ crc = legic4Crc(LEGIC_WRITE, index, byte, addr_sz+1);
+
// send write command
- uint32_t cmd = ((crc <<(addr_sz+1+8)) //CRC
- |(byte <<(addr_sz+1)) //Data
- |(addr <<1) //Address
- | LEGIC_WRITE); //CMD = Write
-
- uint32_t cmd_sz = addr_sz+1+8+4; //crc+data+cmd
-
- legic_prng_forward(2);
+ uint32_t cmd = LEGIC_WRITE;
+ cmd |= index << 1; // index
+ cmd |= byte << (addr_sz+1); // Data
+ cmd |= (crc & 0xF ) << (addr_sz+1+8); // CRC
- WaitTicks(330);
+ WaitTicks(240);
frame_sendAsReader(cmd, cmd_sz);
-
- 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;
+
+ LINE_IN;
- WaitTicks(TAG_FRAME_WAIT);
+ start = GET_TICKS;
- for( t = 0; t < 80; ++t) {
+ // ACK, - one single "1" bit after 3.6ms
+ // 3.6ms = 3600us * 1.5 = 5400ticks.
+ WaitTicks(5400);
+
+ next_bit_at = GET_TICKS + TAG_BIT_PERIOD;
+
+ while ( i-- ) {
+ WDT_HIT();
edges = 0;
- next_bit_at += TAG_BIT_PERIOD;
- while(timer->TC_CV < next_bit_at) {
+ while ( GET_TICKS < next_bit_at) {
+
volatile uint32_t level = (AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_DIN);
- if(level != old_level)
- edges++;
+
+ if (level != old_level)
+ ++edges;
old_level = level;
}
- if(edges > 20 ) { /* expected are 42 edges */
- int t = timer->TC_CV;
- int c = t / TAG_BIT_PERIOD;
-
- ResetTimer(timer);
- legic_prng_forward(c);
- return 0;
+
+ next_bit_at += TAG_BIT_PERIOD;
+
+ // We expect 42 edges (ONE)
+ if(edges > 20 ) {
+ steps = ( (GET_TICKS - start) / TAG_BIT_PERIOD);
+ legic_prng_forward(steps);
+ isOK = true;
+ goto OUT;
}
}
-
- ResetTimer(timer);
- return -1;
+
+OUT: ;
+ legic_prng_forward(1);
+
+ uint8_t cmdbytes[] = {1, isOK, BYTEx(steps, 0), BYTEx(steps, 1) };
+ LogTrace(cmdbytes, sizeof(cmdbytes), start, GET_TICKS, NULL, FALSE);
+ return isOK;
}
int LegicRfReader(uint16_t offset, uint16_t len, uint8_t iv) {
@@ -476,20 +470,16 @@ int LegicRfReader(uint16_t offset, uint16_t len, uint8_t iv) {
uint8_t isOK = 1;
legic_card_select_t card;
- LegicCommonInit();
+ LegicCommonInit(TRUE);
if ( legic_select_card_iv(&card, iv) ) {
isOK = 0;
goto OUT;
}
- switch_off_tag_rwd();
-
- if (len + offset >= card.cardsize)
+ if (len + offset > card.cardsize)
len = card.cardsize - offset;
- setup_phase_reader(iv);
-
LED_B_ON();
while (i < len) {
int r = legic_read_byte(offset + i, card.cmdsize);
@@ -511,185 +501,45 @@ OUT:
return 0;
}
-/*int _LegicRfWriter(int offset, int bytes, int addr_sz, uint8_t *BigBuf, int RoundBruteforceValue) {
- int byte_index=0;
-
- LED_B_ON();
- setup_phase_reader(iv);
- //legic_prng_forward(2);
- while(byte_index < bytes) {
- int r;
-
- //check if the DCF should be changed
- if ( (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, RoundBruteforceValue);
- //legic_prng_forward(1);
- if(r == 0) {
- byte_index++;
- r = legic_write_byte(BigBuf[(0x06-byte_index)], (0x06-byte_index), addr_sz, RoundBruteforceValue);
- }
- //legic_prng_forward(1);
- }
- else {
- r = legic_write_byte(BigBuf[byte_index+offset], byte_index+offset, addr_sz, RoundBruteforceValue);
- }
- if((r != 0) || BUTTON_PRESS()) {
- Dbprintf("operation aborted @ 0x%03.3x", byte_index);
- switch_off_tag_rwd();
- LED_B_OFF();
- LED_C_OFF();
- return -1;
- }
-
- WDT_HIT();
- byte_index++;
- if(byte_index & 0x10) LED_C_ON(); else LED_C_OFF();
- }
- LED_B_OFF();
- LED_C_OFF();
- DbpString("write successful");
- return 0;
-}*/
+void LegicRfWriter(uint16_t offset, uint16_t len, uint8_t iv, uint8_t *data) {
-void LegicRfWriter(uint16_t offset, uint16_t bytes, uint8_t iv) {
-
- int byte_index = 0;
- uint8_t isOK = 1;
+ #define LOWERLIMIT 4
+ uint8_t isOK = 1, msg = 0;
legic_card_select_t card;
- LegicCommonInit();
-
- if ( legic_select_card_iv(&card, iv) ) {
+ // uid NOT is writeable.
+ if ( offset <= LOWERLIMIT ) {
isOK = 0;
goto OUT;
}
- switch_off_tag_rwd();
+ LegicCommonInit(TRUE);
- switch(card.tagtype) {
- case 0x0d:
- if(offset+bytes > 22) {
- Dbprintf("Error: can not write to 0x%03.3x on MIM22", offset + bytes);
- return;
- }
- 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) {
- Dbprintf("Error: can not write to 0x%03.3x on MIM256", offset + bytes);
- return;
- }
- 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) {
- Dbprintf("Error: can not write to 0x%03.3x on MIM1024", offset + bytes);
- return;
- }
- if ( MF_DBGLEVEL >= 2) Dbprintf("MIM1024 card found, writing 0x%03.3x - 0x%03.3x ...", offset, offset + bytes);
- break;
- default:
- return;
+ if ( legic_select_card_iv(&card, iv) ) {
+ isOK = 0;
+ msg = 1;
+ goto OUT;
}
-
- 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), card.addrsize);
-
- // write second byte on success
- if(r == 0) {
- byte_index++;
- 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, card.addrsize);
- }
-
- if ((r != 0) || BUTTON_PRESS()) {
- Dbprintf("operation aborted @ 0x%03.3x", byte_index);
+ if ( len + offset > card.cardsize)
+ len = card.cardsize - offset;
+
+ LED_B_ON();
+ while( len > 0 ) {
+ --len;
+ if ( !legic_write_byte( len + offset, data[len], card.addrsize) ) {
+ Dbprintf("operation failed | %02X | %02X | %02X", len + offset, len, data[len] );
isOK = 0;
goto OUT;
}
-
- WDT_HIT();
- byte_index++;
+ 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();
}
-void LegicRfRawWriter(int address, int byte, uint8_t iv) {
-
- int byte_index = 0, addr_sz = 0;
-
- LegicCommonInit();
-
- if ( MF_DBGLEVEL >= 2) DbpString("setting up legic card");
-
- uint32_t tag_type = setup_phase_reader(iv);
-
- switch_off_tag_rwd();
-
- switch(tag_type) {
- case 0x0d:
- if(address > 22) {
- Dbprintf("Error: can not write to 0x%03.3x on MIM22", address);
- return;
- }
- addr_sz = 5;
- 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) {
- Dbprintf("Error: can not write to 0x%03.3x on MIM256", address);
- return;
- }
- addr_sz = 8;
- 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) {
- Dbprintf("Error: can not write to 0x%03.3x on MIM1024", address);
- return;
- }
- addr_sz = 10;
- 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();
-
- setup_phase_reader(iv);
-
- int r = legic_write_byte(byte, address, addr_sz);
-
- if((r != 0) || BUTTON_PRESS()) {
- Dbprintf("operation aborted @ 0x%03.3x (%1d)", byte_index, r);
- switch_off_tag_rwd();
- LEDsoff();
- return;
- }
-
- LEDsoff();
- if ( MF_DBGLEVEL >= 1) DbpString("write successful");
-}
-
int legic_select_card_iv(legic_card_select_t *p_card, uint8_t iv){
if ( p_card == NULL ) return 1;
@@ -724,12 +574,46 @@ int legic_select_card(legic_card_select_t *p_card){
return legic_select_card_iv(p_card, 0x01);
}
+//-----------------------------------------------------------------------------
+// Work with emulator memory
+//
+// Note: we call FpgaDownloadAndGo(FPGA_BITSTREAM_HF) here although FPGA is not
+// involved in dealing with emulator memory. But if it is called later, it might
+// destroy the Emulator Memory.
+//-----------------------------------------------------------------------------
+// arg0 = offset
+// arg1 = num of bytes
+void LegicEMemSet(uint32_t arg0, uint32_t arg1, uint8_t *data) {
+ FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+ legic_emlset_mem(data, arg0, arg1);
+}
+// arg0 = offset
+// arg1 = num of bytes
+void LegicEMemGet(uint32_t arg0, uint32_t arg1) {
+ FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+ uint8_t buf[USB_CMD_DATA_SIZE] = {0x00};
+ legic_emlget_mem(buf, arg0, arg1);
+ LED_B_ON();
+ cmd_send(CMD_ACK, arg0, arg1, 0, buf, USB_CMD_DATA_SIZE);
+ LED_B_OFF();
+}
+void legic_emlset_mem(uint8_t *data, int offset, int numofbytes) {
+ cardmem = BigBuf_get_EM_addr();
+ memcpy(cardmem + offset, data, numofbytes);
+}
+void legic_emlget_mem(uint8_t *data, int offset, int numofbytes) {
+ cardmem = BigBuf_get_EM_addr();
+ memcpy(data, cardmem + offset, numofbytes);
+}
+
void LegicRfInfo(void){
+ int r;
+
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);
@@ -738,7 +622,7 @@ void LegicRfInfo(void){
// read UID bytes
for ( uint8_t i = 0; i < sizeof(card->uid); ++i) {
- int r = legic_read_byte(i, card->cmdsize);
+ r = legic_read_byte(i, card->cmdsize);
if ( r == -1 ) {
cmd_send(CMD_ACK,0,0,0,0,0);
goto OUT;
@@ -746,6 +630,15 @@ void LegicRfInfo(void){
card->uid[i] = r & 0xFF;
}
+ // MCC byte.
+ r = legic_read_byte(4, card->cmdsize);
+ uint32_t calc_mcc = CRC8Legic(card->uid, 4);;
+ if ( r != calc_mcc) {
+ cmd_send(CMD_ACK,0,0,0,0,0);
+ goto OUT;
+ }
+
+ // OK
cmd_send(CMD_ACK, 1, 0, 0, buf, sizeof(legic_card_select_t));
OUT:
@@ -758,38 +651,50 @@ OUT:
*/
static void frame_handle_tag(struct legic_frame const * const f)
{
- uint8_t *BigBuf = BigBuf_get_addr();
-
+ // log
+ //uint8_t cmdbytes[] = {bits, BYTEx(data, 0), BYTEx(data, 1)};
+ //LogTrace(cmdbytes, sizeof(cmdbytes), starttime, GET_TICKS, NULL, FALSE);
+ //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);
- frame_send_tag(0x3d, 6); /* 0x3d^0x26 = 0x1B */
+
+ Dbprintf("ICE: IV: %02x ", f->data);
+
+ // We should have three tagtypes with three different answers.
+ 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;
}
/* 0x19==??? */
if(legic_state == STATE_IV) {
- int local_key = get_key_stream(3, 6);
+ uint32_t local_key = get_key_stream(3, 6);
int xored = 0x39 ^ local_key;
if((f->bits == 6) && (f->data == xored)) {
legic_state = STATE_CON;
ResetTimer(timer);
- WaitUS(200);
+ WaitTicks(300);
return;
} else {
@@ -803,64 +708,53 @@ static void frame_handle_tag(struct legic_frame const * const f)
/* Read */
if(f->bits == 11) {
if(legic_state == STATE_CON) {
- int key = get_key_stream(2, 11); //legic_phase_drift, 11);
- int addr = f->data ^ key; addr = addr >> 1;
- int data = BigBuf[addr];
- int hash = legic4Crc(LEGIC_READ, addr, data, 11) << 8;
- BigBuf[OFFSET_LOG+legic_read_count] = (uint8_t)addr;
- legic_read_count++;
-
- //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);
-
- ResetTimer(timer);
+ uint32_t key = get_key_stream(2, 11); //legic_phase_drift, 11);
+ uint16_t addr = f->data ^ key;
+ addr >>= 1;
+ uint8_t data = cardmem[addr];
+
+ uint32_t crc = legic4Crc(LEGIC_READ, addr, data, 11) << 8;
+
+ //legic_read_count++;
+ //legic_prng_forward(legic_reqresp_drift);
+
+ frame_send_tag(crc | data, 12);
+ //ResetTimer(timer);
legic_prng_forward(2);
- WaitUS(180);
+ WaitTicks(330);
return;
}
}
/* Write */
- if(f->bits == 23) {
- int key = get_key_stream(-1, 23); //legic_frame_drift, 23);
- int addr = f->data ^ key; addr = addr >> 1; addr = addr & 0x3ff;
- int data = f->data ^ key; data = data >> 11; data = data & 0xff;
-
+ 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;
+ addr &= 0x3ff;
+ uint32_t data = f->data ^ key;
+ data >>= 11;
+ data &= 0xff;
+
+ cardmem[addr] = data;
/* write command */
legic_state = STATE_DISCON;
LED_C_OFF();
Dbprintf("write - addr: %x, data: %x", addr, data);
+ // should send a ACK after 3.6ms
return;
}
if(legic_state != STATE_DISCON) {
Dbprintf("Unexpected: sz:%u, Data:%03.3x, State:%u, Count:%u", f->bits, f->data, legic_state, legic_read_count);
- int i;
Dbprintf("IV: %03.3x", legic_prng_iv);
- for(i = 0; i<legic_read_count; i++) {
- Dbprintf("Read Nb: %u, Addr: %u", i, BigBuf[OFFSET_LOG+i]);
- }
-
- for(i = -1; i<legic_read_count; i++) {
- uint32_t t;
- t = BigBuf[OFFSET_LOG+256+i*4];
- t |= BigBuf[OFFSET_LOG+256+i*4+1] << 8;
- t |= BigBuf[OFFSET_LOG+256+i*4+2] <<16;
- t |= BigBuf[OFFSET_LOG+256+i*4+3] <<24;
-
- Dbprintf("Cycles: %u, Frame Length: %u, Time: %u",
- BigBuf[OFFSET_LOG+128+i],
- BigBuf[OFFSET_LOG+384+i],
- t);
- }
}
- 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
@@ -897,52 +791,112 @@ void LegicRfSimulate(int phase, int frame, int reqresp)
* 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);
- FpgaSetupSsc();
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 */
AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_DIN;
AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DIN;
- //setup_timer();
+ // need a way to determine which tagtype we are simulating
+
+ // hook up emulator memory
+ cardmem = BigBuf_get_EM_addr();
+
+ clear_trace();
+ set_tracing(TRUE);
+
crc_init(&legic_crc, 4, 0x19 >> 1, 0x5, 0);
- int old_level = 0;
- int active = 0;
- legic_state = STATE_DISCON;
+ StartTicks();
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()) {
- int level = !!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_DIN);
- int time = timer->TC_CV;
+
+ level = !!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_DIN);
- if(level != old_level) {
- if(level == 1) {
- timer->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG;
-
+ uint32_t time = GET_TICKS;
+
+ if (level != old_level) {
+ if (level == 1) {
+
+ //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();
@@ -950,24 +904,36 @@ void LegicRfSimulate(int phase, int frame, int reqresp)
}
}
+
/* 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();
}
- if(time >= (20*RWD_TIME_1) && (timer->TC_SR & AT91C_TC_CLKSTA)) {
- timer->TC_CCR = AT91C_TC_CLKDIS;
- }
+ /*
+ * Disable the counter, Then wait for the clock to acknowledge the
+ * 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) )
+ StopTicks();
old_level = level;
WDT_HIT();
- }
- if ( MF_DBGLEVEL >= 1) DbpString("Stopped");
+}
+
+ 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