Proxmark/proxmark3
1
1
Fork 0
mirror of https://github.com/Proxmark/proxmark3.git synced 2025-02-24 15:44:47 +08:00
Code Issues Projects Releases Packages Wiki Activity

Remove LEGIC RF tag emulation code since it's useless without keystream generator

Browse source
This commit is contained in:
henryk@ploetzli.ch 2009-12-28 18:18:25 +00:00
parent 84c02e97e0
commit 1d99b0df4a
3 changed files with 0 additions and 187 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
armsrc/appmain.c
View file

@ -621,10 +621,6 @@ void UsbPacketReceived(BYTE *packet, int len)
break; break;
#endif #endif
case CMD_SIMULATE_TAG_LEGIC_RF:
LegicRfSimulate();
break;
case CMD_MEASURE_ANTENNA_TUNING: case CMD_MEASURE_ANTENNA_TUNING:
MeasureAntennaTuning(); MeasureAntennaTuning();
break; break;

175
armsrc/legicrf.c
View file

@ -40,45 +40,6 @@ static void setup_timer(void)
#define FUZZ_EQUAL(value, target, fuzz) ((value) > ((target)-(fuzz)) && (value) < ((target)+(fuzz))) #define FUZZ_EQUAL(value, target, fuzz) ((value) > ((target)-(fuzz)) && (value) < ((target)+(fuzz)))
static const struct legic_frame queries[] = {
{7, 0x55}, /* 1010 101 */
};
static const struct legic_frame responses[] = {
{6, 0x3b}, /* 1101 11 */
};
/* Send a frame in tag mode, the FPGA must have been set up by
* LegicRfSimulate
*/
static void frame_send_tag(uint16_t response, int bits)
{
#if 0
/* Use the SSC to send a response. 8-bit transfers, LSBit first, 100us per bit */
#else
/* Bitbang the response */
AT91C_BASE_PIOA->PIO_CODR = GPIO_SSC_DOUT;
AT91C_BASE_PIOA->PIO_OER = GPIO_SSC_DOUT;
AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT;
/* Wait for the frame start */
while(timer->TC_CV < TAG_TIME_WAIT) ;
int i;
for(i=0; i<bits; i++) {
int nextbit = timer->TC_CV + TAG_TIME_BIT;
int bit = response & 1;
response = 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) ;
}
AT91C_BASE_PIOA->PIO_CODR = GPIO_SSC_DOUT;
#endif
}
/* Send a frame in reader mode, the FPGA must have been set up by /* Send a frame in reader mode, the FPGA must have been set up by
* LegicRfReader * LegicRfReader
*/ */
@ -181,148 +142,12 @@ static void frame_receive_rwd(struct legic_frame * const f, int bits)
f->bits = bits; f->bits = bits;
} }
/* Figure out a response to a frame in tag mode */
static void frame_respond_tag(struct legic_frame const * const f)
{
LED_D_ON();
int i, r_size=0;
uint16_t r_data=0;
for(i=0; i<sizeof(queries)/sizeof(queries[0]); i++) {
if(f->bits == queries[i].bits && f->data == queries[i].data) {
r_data = responses[i].data;
r_size = responses[i].bits;
break;
}
}
if(r_size != 0) {
frame_send_tag(r_data, r_size);
LED_A_ON();
} else {
LED_A_OFF();
}
LED_D_OFF();
}
static void frame_append_bit(struct legic_frame * const f, int bit)
{
if(f->bits >= 15)
return; /* Overflow, won't happen */
f->data |= (bit<<f->bits);
f->bits++;
}
static int frame_is_empty(struct legic_frame const * const f)
{
return( f->bits <= 4 );
}
/* Handle (whether to respond) a frame in tag mode */
static void frame_handle_tag(struct legic_frame const * const f)
{
if(f->bits == 6) {
/* Short path */
return;
}
if( !frame_is_empty(f) ) {
frame_respond_tag(f);
}
}
static void frame_clean(struct legic_frame * const f) static void frame_clean(struct legic_frame * const f)
{ {
f->data = 0; f->data = 0;
f->bits = 0; f->bits = 0;
} }
enum emit_mode {
EMIT_RWD, /* Emit in tag simulation mode, e.g. the source is the RWD */
EMIT_TAG /* Emit in reader simulation mode, e.g. the source is the TAG */
};
static void emit(enum emit_mode mode, int bit)
{
if(bit == -1) {
if(mode == EMIT_RWD) {
frame_handle_tag(&current_frame);
}
frame_clean(&current_frame);
} else if(bit == 0) {
frame_append_bit(&current_frame, 0);
} else if(bit == 1) {
frame_append_bit(&current_frame, 1);
}
}
void LegicRfSimulate(void)
{
/* ADC path high-frequency peak detector, FPGA in high-frequency simulator mode,
* modulation mode set to 212kHz subcarrier. We are getting the incoming raw
* envelope waveform on DIN and should send our response on DOUT.
*
* The LEGIC RF protocol is pulse-pause-encoding from reader to card, so we'll
* 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.
*/
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();
int old_level = 0;
int active = 0;
while(!BUTTON_PRESS()) {
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(EMIT_RWD, 1);
active = 1;
LED_B_ON();
} else if(FUZZ_EQUAL(time, RWD_TIME_0, RWD_TIME_FUZZ)) {
/* 0 bit */
emit(EMIT_RWD, 0);
active = 1;
LED_B_ON();
} else if(active) {
/* invalid */
emit(EMIT_RWD, -1);
active = 0;
LED_B_OFF();
}
}
}
if(time >= (RWD_TIME_1+RWD_TIME_FUZZ) && active) {
/* Frame end */
emit(EMIT_RWD, -1);
active = 0;
LED_B_OFF();
}
if(time >= (20*RWD_TIME_1) && (timer->TC_SR & AT91C_TC_CLKSTA)) {
timer->TC_CCR = AT91C_TC_CLKDIS;
}
old_level = level;
WDT_HIT();
}
}
void LegicRfReader(void) void LegicRfReader(void)
{ {
SetAdcMuxFor(GPIO_MUXSEL_HIPKD); SetAdcMuxFor(GPIO_MUXSEL_HIPKD);

8
client/command.c
View file

@ -202,12 +202,6 @@ static void CmdHi14asnoop(char *str)
SendCommand(&c); SendCommand(&c);
} }
static void CmdLegicRfSim(char *str)
{
UsbCommand c={CMD_SIMULATE_TAG_LEGIC_RF};
SendCommand(&c);
}
static void CmdLegicRfRead(char *str) static void CmdLegicRfRead(char *str)
{ {
UsbCommand c={CMD_READER_LEGIC_RF}; UsbCommand c={CMD_READER_LEGIC_RF};
@ -2846,7 +2840,6 @@ static struct {
{"indalademod", CmdIndalademod, 0, "['224'] -- Demodulate samples for Indala 64 bit UID (option '224' for 224 bit)"}, {"indalademod", CmdIndalademod, 0, "['224'] -- Demodulate samples for Indala 64 bit UID (option '224' for 224 bit)"},
{"lcd", CmdLcd, 0, "<HEX command> <count> -- Send command/data to LCD"}, {"lcd", CmdLcd, 0, "<HEX command> <count> -- Send command/data to LCD"},
{"lcdreset", CmdLcdReset, 0, "Hardware reset LCD"}, {"lcdreset", CmdLcdReset, 0, "Hardware reset LCD"},
{"legicrfsim", CmdLegicRfSim, 0, "Start the LEGIC RF tag simulator"},
{"legicrfread", CmdLegicRfRead, 0, "Start the LEGIC RF reader"}, {"legicrfread", CmdLegicRfRead, 0, "Start the LEGIC RF reader"},
{"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"}, {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
{"locomread", CmdLoCommandRead, 0, "<off period> <'0' period> <'1' period> <command> ['h'] -- Modulate LF reader field to send command before read (all periods in microseconds) (option 'h' for 134)"}, {"locomread", CmdLoCommandRead, 0, "<off period> <'0' period> <'1' period> <command> ['h'] -- Modulate LF reader field to send command before read (all periods in microseconds) (option 'h' for 134)"},
@ -3007,7 +3000,6 @@ void UsbCommandReceived(UsbCommand *c)
if (c->cmd != CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K) goto unexpected_response; if (c->cmd != CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K) goto unexpected_response;
int i; int i;
for(i=0; i<48; i++) sample_buf[i] = c->d.asBytes[i]; for(i=0; i<48; i++) sample_buf[i] = c->d.asBytes[i];
printf("stored 48 samples\n");
received_command = c->cmd; received_command = c->cmd;
return; return;
default: default: