mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-11-11 10:14:34 +08:00
115 lines
3.5 KiB
C
115 lines
3.5 KiB
C
//-----------------------------------------------------------------------------
|
|
// Copyright (C) Artyom Gnatyuk, 2020
|
|
// Copyright (C) Proxmark3 contributors. See AUTHORS.md for details.
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// See LICENSE.txt 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"
|
|
#include "commonutil.h"
|
|
|
|
#define MAX_IND 16 // 4 LEDs - 2^4 combinations
|
|
#define LF_CLOCK 64 // for 125kHz
|
|
|
|
// Predefined IDs must be stored in em4100emul_low[].
|
|
static uint64_t em4100emul_low[] = {0x565A1140BE, 0x365A398149, 0x5555555555, 0xFFFFFFFFFF};
|
|
static uint8_t em4100emul_slots_count;
|
|
static int em4100emul_buflen;
|
|
|
|
void ModInfo(void) {
|
|
DbpString(" LF EM4100 simulator standalone mode");
|
|
}
|
|
|
|
static uint64_t rev_quads(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;
|
|
}
|
|
|
|
static void fill_buff(uint8_t bit) {
|
|
uint8_t *bba = BigBuf_get_addr();
|
|
memset(bba + em4100emul_buflen, bit, LF_CLOCK / 2);
|
|
em4100emul_buflen += (LF_CLOCK / 2);
|
|
memset(bba + em4100emul_buflen, bit ^ 1, LF_CLOCK / 2);
|
|
em4100emul_buflen += (LF_CLOCK / 2);
|
|
}
|
|
|
|
static void construct_EM410x_emul(uint64_t id) {
|
|
|
|
int i, j;
|
|
int binary[4] = {0, 0, 0, 0};
|
|
int parity[4] = {0, 0, 0, 0};
|
|
em4100emul_buflen = 0;
|
|
|
|
for (i = 0; i < 9; i++)
|
|
fill_buff(1);
|
|
|
|
for (i = 0; i < 10; i++) {
|
|
for (j = 3; j >= 0; j--, id /= 2)
|
|
binary[j] = id % 2;
|
|
|
|
for (j = 0; j < 4; j++)
|
|
fill_buff(binary[j]);
|
|
|
|
fill_buff(binary[0] ^ binary[1] ^ binary[2] ^ binary[3]);
|
|
for (j = 0; j < 4; j++)
|
|
parity[j] ^= binary[j];
|
|
}
|
|
|
|
for (j = 0; j < 4; j++)
|
|
fill_buff(parity[j]);
|
|
|
|
fill_buff(0);
|
|
}
|
|
|
|
static void LED_Slot(int i) {
|
|
LEDsoff();
|
|
if (em4100emul_slots_count > 4) {
|
|
LED(i % MAX_IND, 0); //binary indication for em4100emul_slots_count > 4
|
|
} else {
|
|
LED(1 << i, 0); //simple indication for em4100emul_slots_count <=4
|
|
}
|
|
}
|
|
|
|
void RunMod(void) {
|
|
StandAloneMode();
|
|
FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
|
|
Dbprintf("[=] >> LF EM4100 simulator started <<");
|
|
|
|
int selected = 0; //selected slot after start
|
|
em4100emul_slots_count = ARRAYLEN(em4100emul_low);
|
|
for (;;) {
|
|
WDT_HIT();
|
|
if (data_available()) break;
|
|
|
|
SpinDelay(100);
|
|
SpinUp(100);
|
|
LED_Slot(selected);
|
|
construct_EM410x_emul(rev_quads(em4100emul_low[selected]));
|
|
SimulateTagLowFrequency(em4100emul_buflen, 0, true);
|
|
selected = (selected + 1) % em4100emul_slots_count;
|
|
}
|
|
}
|