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This commit is contained in:
Philippe Teuwen 2020-12-23 19:51:10 +01:00
commit 8d4acbe3a6
13 changed files with 78 additions and 79 deletions
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38
armsrc/em4x70.c
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@ -190,9 +190,9 @@ static uint32_t get_rising_pulse_length(void) {
static uint32_t get_pulse_length(edge_detection_t edge) {
if(edge == RISING_EDGE)
if (edge == RISING_EDGE)
return get_rising_pulse_length();
else if(edge == FALLING_EDGE)
else if (edge == FALLING_EDGE)
return get_falling_pulse_length();
return 0;
@ -292,11 +292,11 @@ static bool check_ack(void) {
// ACK 64 + 64
// NACK 64 + 48
if (check_pulse_length(get_pulse_length(FALLING_EDGE), 2 * EM4X70_T_TAG_FULL_PERIOD) &&
check_pulse_length(get_pulse_length(FALLING_EDGE), 2 * EM4X70_T_TAG_FULL_PERIOD)) {
check_pulse_length(get_pulse_length(FALLING_EDGE), 2 * EM4X70_T_TAG_FULL_PERIOD)) {
// ACK
return true;
}
}
// Othewise it was a NACK or Listen Window
return false;
}
@ -426,10 +426,10 @@ static bool find_listen_window(bool command) {
96 ( 64 + 32 )
64 ( 32 + 16 +16 )*/
if (check_pulse_length(get_pulse_length(RISING_EDGE), (2*EM4X70_T_TAG_FULL_PERIOD) + EM4X70_T_TAG_HALF_PERIOD) &&
check_pulse_length(get_pulse_length(RISING_EDGE), (2*EM4X70_T_TAG_FULL_PERIOD) + EM4X70_T_TAG_HALF_PERIOD) &&
check_pulse_length(get_pulse_length(FALLING_EDGE), (2*EM4X70_T_TAG_FULL_PERIOD) + EM4X70_T_TAG_FULL_PERIOD) &&
check_pulse_length(get_pulse_length(FALLING_EDGE), EM4X70_T_TAG_FULL_PERIOD + (2*EM4X70_T_TAG_HALF_PERIOD))) {
if (check_pulse_length(get_pulse_length(RISING_EDGE), (2 * EM4X70_T_TAG_FULL_PERIOD) + EM4X70_T_TAG_HALF_PERIOD) &&
check_pulse_length(get_pulse_length(RISING_EDGE), (2 * EM4X70_T_TAG_FULL_PERIOD) + EM4X70_T_TAG_HALF_PERIOD) &&
check_pulse_length(get_pulse_length(FALLING_EDGE), (2 * EM4X70_T_TAG_FULL_PERIOD) + EM4X70_T_TAG_FULL_PERIOD) &&
check_pulse_length(get_pulse_length(FALLING_EDGE), EM4X70_T_TAG_FULL_PERIOD + (2 * EM4X70_T_TAG_HALF_PERIOD))) {
if (command) {
/* Here we are after the 64 duration edge.
@ -438,7 +438,7 @@ static bool find_listen_window(bool command) {
*
* I've found between 4-5 quarter periods (32-40) works best
*/
WaitTicks( 4 * EM4X70_T_TAG_QUARTER_PERIOD );
WaitTicks(4 * EM4X70_T_TAG_QUARTER_PERIOD);
// Send RM Command
em4x70_send_bit(0);
em4x70_send_bit(0);
@ -559,7 +559,7 @@ static int em4x70_receive(uint8_t *bits, size_t length) {
WaitTicks(6 * EM4X70_T_TAG_FULL_PERIOD);
// wait until we get the transition from 1's to 0's which is 1.5 full windows
for(int i = 0; i < EM4X70_T_READ_HEADER_LEN; i++) {
for (int i = 0; i < EM4X70_T_READ_HEADER_LEN; i++) {
pl = get_pulse_length(edge);
if (check_pulse_length(pl, 3 * EM4X70_T_TAG_HALF_PERIOD)) {
foundheader = true;
@ -575,7 +575,7 @@ static int em4x70_receive(uint8_t *bits, size_t length) {
// Skip next 3 0's, header check consumes the first 0
for (int i = 0; i < 3; i++) {
// If pulse length is not 1 bit, then abort early
if(!check_pulse_length(get_pulse_length(edge), EM4X70_T_TAG_FULL_PERIOD)) {
if (!check_pulse_length(get_pulse_length(edge), EM4X70_T_TAG_FULL_PERIOD)) {
return 0;
}
}
@ -745,8 +745,8 @@ void em4x70_write_pin(em4x70_data_t *etd) {
if (em4x70_read_id()) {
// Write new PIN
if( (write( etd->pin & 0xFFFF, EM4X70_PIN_WORD_UPPER) == PM3_SUCCESS) &&
(write((etd->pin >> 16) & 0xFFFF, EM4X70_PIN_WORD_LOWER) == PM3_SUCCESS)) {
if ((write(etd->pin & 0xFFFF, EM4X70_PIN_WORD_UPPER) == PM3_SUCCESS) &&
(write((etd->pin >> 16) & 0xFFFF, EM4X70_PIN_WORD_LOWER) == PM3_SUCCESS)) {
// Now Try to authenticate using the new PIN
@ -784,13 +784,13 @@ void em4x70_write_key(em4x70_data_t *etd) {
// Read ID to ensure we can write to card
if (em4x70_read_id()) {
status = 1;
// Write each crypto block
for(int i = 0; i < 6; i++) {
uint16_t key_word = (etd->crypt_key[(i*2)+1] << 8) + etd->crypt_key[i*2];
// Write each crypto block
for (int i = 0; i < 6; i++) {
uint16_t key_word = (etd->crypt_key[(i * 2) + 1] << 8) + etd->crypt_key[i * 2];
// Write each word, abort if any failure occurs
if (write(key_word, 9-i) != PM3_SUCCESS) {
if (write(key_word, 9 - i) != PM3_SUCCESS) {
status = 0;
break;
}