mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-09-20 23:36:31 +08:00
101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
//-----------------------------------------------------------------------------
|
|
// Artyom Gnatyuk, 2020
|
|
//
|
|
// 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
|
|
// the license.
|
|
//-----------------------------------------------------------------------------
|
|
// LF emul - Very simple mode. Simulate only predefined in low[] IDs
|
|
// Short click - select next slot and start simulation
|
|
//-----------------------------------------------------------------------------
|
|
#include "standalone.h"
|
|
#include "proxmark3_arm.h"
|
|
#include "appmain.h"
|
|
#include "fpgaloader.h"
|
|
#include "lfops.h"
|
|
#include "util.h"
|
|
#include "dbprint.h"
|
|
#include "ticks.h"
|
|
#include "string.h"
|
|
#include "BigBuf.h"
|
|
|
|
#define MAX_IND 16 // 4 LEDs - 2^4 combinations
|
|
#define CLOCK 64 //for 125kHz
|
|
|
|
// low & high - array for storage IDs. Its length must be equal.
|
|
// Predefined IDs must be stored in low[].
|
|
// In high[] must be nulls
|
|
uint64_t low[] = {0x565A1140BE, 0x365A398149, 0x5555555555, 0xFFFFFFFFFF};
|
|
uint32_t high[] = {0, 0, 0, 0};
|
|
uint8_t *bba, slots_count;
|
|
int buflen;
|
|
|
|
void ModInfo(void) {
|
|
DbpString(" LF EM4100 simulator standalone mode");
|
|
}
|
|
|
|
uint64_t ReversQuads(uint64_t bits) {
|
|
uint64_t result = 0;
|
|
for (int i = 0; i < 16; i++) {
|
|
result += ((bits >> (60 - 4 * i)) & 0xf) << (4 * i);
|
|
}
|
|
return result >> 24;
|
|
}
|
|
|
|
void FillBuff(uint8_t bit) {
|
|
memset(bba + buflen, bit, CLOCK / 2);
|
|
buflen += (CLOCK / 2);
|
|
memset(bba + buflen, bit ^ 1, CLOCK / 2);
|
|
buflen += (CLOCK / 2);
|
|
}
|
|
|
|
void ConstructEM410xEmulBuf(uint64_t id) {
|
|
|
|
int i, j, binary[4], parity[4];
|
|
buflen = 0;
|
|
for (i = 0; i < 9; i++)
|
|
FillBuff(1);
|
|
parity[0] = parity[1] = parity[2] = parity[3] = 0;
|
|
for (i = 0; i < 10; i++) {
|
|
for (j = 3; j >= 0; j--, id /= 2)
|
|
binary[j] = id % 2;
|
|
for (j = 0; j < 4; j++)
|
|
FillBuff(binary[j]);
|
|
FillBuff(binary[0] ^ binary[1] ^ binary[2] ^ binary[3]);
|
|
for (j = 0; j < 4; j++)
|
|
parity[j] ^= binary[j];
|
|
}
|
|
for (j = 0; j < 4; j++)
|
|
FillBuff(parity[j]);
|
|
FillBuff(0);
|
|
}
|
|
|
|
void LED_Slot(int i) {
|
|
LEDsoff();
|
|
if (slots_count > 4) {
|
|
LED(i % MAX_IND, 0); //binary indication for slots_count > 4
|
|
} else {
|
|
LED(1 << i, 0); //simple indication for slots_count <=4
|
|
}
|
|
}
|
|
|
|
void RunMod() {
|
|
StandAloneMode();
|
|
FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
|
|
Dbprintf("[=] >> LF EM4100 simulator started <<");
|
|
|
|
int selected = 0; //selected slot after start
|
|
slots_count = sizeof(low) / sizeof(low[0]);
|
|
bba = BigBuf_get_addr();
|
|
for (;;) {
|
|
WDT_HIT();
|
|
if (data_available()) break;
|
|
SpinDelay(100);
|
|
SpinUp(100);
|
|
LED_Slot(selected);
|
|
ConstructEM410xEmulBuf(ReversQuads(low[selected]));
|
|
SimulateTagLowFrequency(buflen, 0, true);
|
|
selected = (selected + 1) % slots_count;
|
|
}
|
|
}
|