RfidResearchGroup/proxmark3
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This commit is contained in:
iceman1001 2021-02-24 14:26:21 +01:00
parent bb6ea597b4
commit 2184b0dde8
1 changed files with 19 additions and 22 deletions
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41
armsrc/em4x50.c
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@ -182,7 +182,6 @@ static bool get_signalproperties(void) {
uint8_t sample_max_mean = 0;
uint8_t sample_max[no_periods];
uint32_t sample_max_sum = 0;
uint32_t tval = 0;
memset(sample_max, 0x00, sizeof(sample_max));
// wait until signal/noise > 1 (max. 32 periods)
@ -208,7 +207,7 @@ static bool get_signalproperties(void) {
// 3 single "full periods" to eliminate the influence of a listen window
for (int i = 0; i < no_periods; i++) {
tval = GetTicks();
uint32_t tval = GetTicks();
while (GetTicks() - tval < 12 * 3 * EM4X50_T_TAG_FULL_PERIOD) {
if (BUTTON_PRESS()) return false;
@ -331,10 +330,10 @@ static void em4x50_reader_send_byte(uint8_t byte) {
// send byte followed by its (even) parity bit
static void em4x50_reader_send_byte_with_parity(uint8_t byte) {
int parity = 0, bit = 0;
int parity = 0;
for (int i = 0; i < 8; i++) {
bit = (byte >> (7 - i)) & 1;
int bit = (byte >> (7 - i)) & 1;
em4x50_reader_send_bit(bit);
parity ^= bit;
}
@ -849,7 +848,6 @@ static int selective_read(uint32_t addresses, uint32_t *words) {
// reads by using "selective read mode" -> bidirectional communication
void em4x50_read(em4x50_data_t *etd) {
bool blogin = true;
int status = PM3_EFAILED;
uint32_t words[EM4X50_NO_WORDS] = {0x0};
@ -862,6 +860,8 @@ void em4x50_read(em4x50_data_t *etd) {
LED_C_OFF();
LED_D_ON();
bool blogin = true;
// try to login with given password
if (etd->pwd_given)
blogin = (login(etd->password1) == PM3_SUCCESS);
@ -879,10 +879,7 @@ void em4x50_read(em4x50_data_t *etd) {
// collects as much information as possible via selective read mode
void em4x50_info(em4x50_data_t *etd) {
bool blogin = true;
int status = PM3_EFAILED;
uint32_t addresses = 0x00002100; // read from fwr = 0 to lwr = 33 (0x21)
uint32_t words[EM4X50_NO_WORDS] = {0x0};
em4x50_setup_read();
@ -892,12 +889,15 @@ void em4x50_info(em4x50_data_t *etd) {
LED_C_OFF();
LED_D_ON();
bool blogin = true;
// login with given password
if (etd->pwd_given)
blogin = (login(etd->password1) == PM3_SUCCESS);
if (blogin)
status = selective_read(addresses, words);
if (blogin) {
// read addresses from fwr = 0 to lwr = 33 (0x21)
status = selective_read(0x00002100, words);
}
}
LEDsoff();
@ -1117,7 +1117,7 @@ static void em4x50_sim_send_bit(uint8_t bit) {
// used as a simple detection of a reader field?
while ((timeout--) && !(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK));
if (timeout <= 0) {
if (timeout == 0) {
return;
}
timeout = EM4X50_T_SIMULATION_TIMEOUT_READ;
@ -1129,7 +1129,7 @@ static void em4x50_sim_send_bit(uint8_t bit) {
//wait until SSC_CLK goes LOW
while ((timeout--) && (AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK));
if (timeout <= 0) {
if (timeout == 0) {
return;
}
timeout = EM4X50_T_SIMULATION_TIMEOUT_READ;
@ -1214,7 +1214,6 @@ static int em4x50_sim_read_bit(void) {
int cycles = 0;
int timeout = EM4X50_T_SIMULATION_TIMEOUT_READ;
uint32_t tval = 0;
while (cycles < EM4X50_T_TAG_FULL_PERIOD) {
@ -1226,7 +1225,7 @@ static int em4x50_sim_read_bit(void) {
timeout = EM4X50_T_SIMULATION_TIMEOUT_READ;
// now check until reader switches on carrier field
tval = GetTicks();
uint32_t tval = GetTicks();
while ((timeout--) && (AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)) {
if (timeout <= 0) {
@ -1436,23 +1435,21 @@ static int em4x50_sim_handle_standard_read_command(uint32_t *tag) {
// last word read protected
int lwrp = (reflect32(tag[EM4X50_PROTECTION]) >> 8) & 0xFF;
int command = PM3_SUCCESS;
while ((BUTTON_PRESS() == false) && (data_available() == false)) {
WDT_HIT();
command = em4x50_sim_send_listen_window(tag);
int res = em4x50_sim_send_listen_window(tag);
if (command != PM3_SUCCESS) {
return command;
if (res != PM3_SUCCESS) {
return res;
}
for (int i = fwr; i <= lwr; i++) {
command = em4x50_sim_send_listen_window(tag);
if (command != PM3_SUCCESS) {
return command;
res = em4x50_sim_send_listen_window(tag);
if (res != PM3_SUCCESS) {
return res;
}
if ((gLogin == false) && (i >= fwrp) && (i <= lwrp)) {