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ADD: started to add tracelog in legic

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ADD: remake of legic codebase.
ADD: started with a annotation for LEGIC in 'hf list'
This commit is contained in:
iceman1001 2016-09-02 16:25:54 +02:00
commit c71c5ee156
8 changed files with 526 additions and 447 deletions
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602
armsrc/legicrf.c
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@ -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.
*/
@ -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<count; i++) {
@ -129,48 +147,55 @@ static void frame_send_tag(uint16_t response, int bits, int crypt)
/* Use time to crypt frame */
if(crypt) {
legic_prng_forward(2); /* TAG_TIME_WAIT -> shift by 2 */
int i; int key = 0;
for(i=0; i<bits; i++) {
int key = 0;
for(int i = 0; i < bits; i++) {
key |= legic_prng_get_bit() << i;
legic_prng_forward(1);
}
//Dbprintf("key = 0x%x", key);
response = response ^ key;
}
/* Wait for the frame start */
while(timer->TC_CV < (TAG_TIME_WAIT - 30)) ;
int i;
for(i=0; i<bits; i++) {
//while(timer->TC_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, int bits){
int i;
for(i=0; i<bits; i++) {
int starttime = timer->TC_CV;
int pause_end = starttime + RWD_TIME_PAUSE, bit_end;
int bit = data & 1;
data = data >> 1;
ResetClock();
int starttime = 0, pause_end = 0, bit = 0, bit_end = 0;
for(int i = 0; i<bits; i++) {
starttime = timer->TC_CV;
pause_end = starttime + RWD_TIME_PAUSE;
bit = data & 1;
data >>= 1;
if(bit ^ legic_prng_get_bit())
bit_end = starttime + RWD_TIME_1;
@ -181,23 +206,27 @@ static void frame_send_rwd(uint32_t data, int bits)
/* 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);
WAIT( bit_end )
}
/* One final pause to mark the end of the frame */
int pause_end = timer->TC_CV + RWD_TIME_PAUSE;
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;
/* 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
@ -224,13 +253,11 @@ 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 data = 0;
int i, old_level = 0, edges = 0;
int next_bit_at = TAG_TIME_WAIT;
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;
@ -246,7 +273,7 @@ static void frame_receive_rwd(struct legic_frame * const f, int bits, int crypt)
}
}
while(timer->TC_CV < next_bit_at) ;
WAIT(next_bit_at)
next_bit_at += TAG_TIME_BIT;
@ -260,7 +287,8 @@ static void frame_receive_rwd(struct legic_frame * const f, int bits, int crypt)
}
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;
@ -269,47 +297,51 @@ 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 */
// 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(int iv) {
/* 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.
legic_prng_init(0); /* no keystream yet */
/* no keystream yet */
legic_prng_init(0);
// IV
frame_send_rwd(iv, 7);
legic_prng_init(iv);
frame_clean(&current_frame);
frame_receive_rwd(&current_frame, 6, 1);
legic_prng_forward(3); /* we wait anyways */
while(timer->TC_CV < 387) ; /* ~ 258us */
// we wait anyways
legic_prng_forward(3);
WAIT_387
frame_send_rwd(0x39, 6);
return current_frame.data;
}
static void LegicCommonInit(void) {
FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
FpgaSetupSsc();
@ -320,18 +352,25 @@ 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) {
crc_clear(&legic_crc);
@ -342,48 +381,69 @@ static int LegicCRC(int byte_index, int value, int cmd_sz) {
}
int legic_read_byte(int byte_index, int cmd_sz) {
int byte;
while(timer->TC_CV < 387) ; /* ~ 258us + 100us*delay */
int byte = 0, calcCrc = 0, crc = 0;
int cmd = 1 | (byte_index << 1);
frame_send_rwd(1 | (byte_index << 1), cmd_sz);
uint8_t cmdbytes[2] = {cmd && 0xff, (cmd >> 8 ) & 0xFF};
uint32_t starttime = timer->TC_CV, endtime = 0;
WAIT_387
// send
frame_send_rwd(cmd, cmd_sz);
// log
endtime = timer->TC_CV;
LogTrace(cmdbytes, 2, starttime, endtime, NULL, TRUE);
// clean
frame_clean(&current_frame);
starttime = timer->TC_CV;
// read
frame_receive_rwd(&current_frame, 12, 1);
// log
endtime = timer->TC_CV;
cmdbytes[0] = current_frame.data & 0xff;
cmdbytes[1] = (current_frame.data >> 8) & 0xFF;
LogTrace(cmdbytes, 2, starttime, endtime, NULL, FALSE);
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 +451,22 @@ 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 +478,15 @@ 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;
}
@ -431,43 +496,44 @@ int LegicRfReader(int offset, int bytes, int iv) {
// ice_legic_select_card();
// return 0;
int byte_index=0, cmd_sz=0, card_sz=0;
int byte_index = 0, cmd_sz = 0, card_sz = 0;
iv = (iv <= 0 ) ? SESSION_IV : iv;
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 +542,22 @@ 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 +604,18 @@ 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 +623,7 @@ 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 +631,7 @@ 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 +639,13 @@ 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 +654,46 @@ 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 +701,7 @@ 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 +709,7 @@ 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 +717,16 @@ 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 +735,29 @@ 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");
LEDsoff();
if ( MF_DBGLEVEL >= 1) DbpString("write successful");
}
int timestamp;
/* 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 +766,11 @@ 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 +781,11 @@ 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 +810,13 @@ 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 +865,25 @@ 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(&current_frame);
} else {
frame_handle_tag(&current_frame);
frame_clean(&current_frame);
}
WDT_HIT();
} else if(bit == 0) {
frame_append_bit(&current_frame, 0);
} else if(bit == 1) {
frame_append_bit(&current_frame, 1);
}
static void emit(int bit) {
switch (bit) {
case 1:
frame_append_bit(&current_frame, 1);
break;
case 0:
frame_append_bit(&current_frame, 0);
break;
default:
if(current_frame.bits <= 4) {
frame_clean(&current_frame);
} else {
frame_handle_tag(&current_frame);
frame_clean(&current_frame);
}
WDT_HIT();
break;
}
}
void LegicRfSimulate(int phase, int frame, int reqresp)
@ -833,84 +899,74 @@ 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;
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);
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");
/* 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;
while(!BUTTON_PRESS() && !usb_poll_validate_length()) {
int level = !!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_DIN);
int time = timer->TC_CV;
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();
}
}
}
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();
}
}
}
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();
/* 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();
}
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------