liz/flipperzero-firmware
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[FL-2245] Introduce Mifare Classic Emulation (#1242)

Browse Source 
* digital signal: introduce digital signal
* nfca: add nfca signal encoder
* nfc: add mifare classic emulation scene
* nfca: add classic emulation support to lib and hal
* mifare classic: support basic read commands
* nfc: add mifare classic menu scene
* mifare classic: start parsing commands in emulation
* mifare classic: add nested auth
* nfc: fix errors
* mifare classic: add encrypt function
* nfc: fix mifare classic save
* lib hex: add hex uint64_t ASCII parser
* flipper format: add uint64 hex format support
* nfc: add mifare classic key map
* nfc: hide mifare classic keys on emulation
* mifare classic: add NACK responce
* nfc: add partial bytes support in transparent mode
* nfc: mifare classic add shadow file support
* digital signal: move arr buffer from BSS to heap
* mifare classic: process access bits more careful
* nfca: fix memory leack
* nfc: format sources
* mifare classic: cleun up

Co-authored-by: あく <alleteam@gmail.com>
This commit is contained in:
gornekich
2022-05-24 17:00:15 +03:00
committed by GitHub
parent 2017baac48
commit d31578508a
28 changed files with 1150 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

89
firmware/targets/f7/furi_hal/furi_hal_nfc.c
View File

@@ -1,9 +1,12 @@
#include "furi_hal_nfc.h"
#include <st25r3916.h>
#include <st25r3916_irq.h>
#include <rfal_rf.h>
#include <furi.h>
#include <m-string.h>
#include <lib/nfc_protocols/nfca.h>
#include <lib/digital_signal/digital_signal.h>
#include <furi_hal_delay.h>
#define TAG "FuriHalNfc"
@@ -394,6 +397,80 @@ ReturnCode furi_hal_nfc_data_exchange(
return ret;
}
static bool furi_hal_nfc_transparent_tx_rx(FuriHalNfcTxRxContext* tx_rx, uint16_t timeout_ms) {
furi_assert(tx_rx->nfca_signal);
platformDisableIrqCallback();
bool ret = false;
// Start transparent mode
st25r3916ExecuteCommand(ST25R3916_CMD_TRANSPARENT_MODE);
// Reconfigure gpio
furi_hal_spi_bus_handle_deinit(&furi_hal_spi_bus_handle_nfc);
furi_hal_gpio_init(&gpio_spi_r_sck, GpioModeInput, GpioPullUp, GpioSpeedLow);
furi_hal_gpio_init(&gpio_spi_r_miso, GpioModeInput, GpioPullUp, GpioSpeedLow);
furi_hal_gpio_init(&gpio_nfc_cs, GpioModeInput, GpioPullUp, GpioSpeedLow);
furi_hal_gpio_init(&gpio_spi_r_mosi, GpioModeOutputPushPull, GpioPullNo, GpioSpeedVeryHigh);
furi_hal_gpio_write(&gpio_spi_r_mosi, false);
// Send signal
nfca_signal_encode(tx_rx->nfca_signal, tx_rx->tx_data, tx_rx->tx_bits, tx_rx->tx_parity);
digital_signal_send(tx_rx->nfca_signal->tx_signal, &gpio_spi_r_mosi);
furi_hal_gpio_write(&gpio_spi_r_mosi, false);
// Configure gpio back to SPI and exit transparent
furi_hal_spi_bus_handle_init(&furi_hal_spi_bus_handle_nfc);
st25r3916ExecuteCommand(ST25R3916_CMD_UNMASK_RECEIVE_DATA);
// Manually wait for interrupt
furi_hal_gpio_init(&gpio_rfid_pull, GpioModeInput, GpioPullDown, GpioSpeedVeryHigh);
st25r3916ClearAndEnableInterrupts(ST25R3916_IRQ_MASK_RXE);
uint32_t irq = 0;
uint8_t rxe = 0;
uint32_t start = DWT->CYCCNT;
while(true) {
if(furi_hal_gpio_read(&gpio_rfid_pull) == true) {
st25r3916ReadRegister(ST25R3916_REG_IRQ_MAIN, &rxe);
if(rxe & (1 << 4)) {
irq = 1;
break;
}
}
uint32_t timeout = DWT->CYCCNT - start;
if(timeout / furi_hal_delay_instructions_per_microsecond() > timeout_ms * 1000) {
FURI_LOG_D(TAG, "Interrupt waiting timeout");
break;
}
}
if(irq) {
uint8_t fifo_stat[2];
st25r3916ReadMultipleRegisters(
ST25R3916_REG_FIFO_STATUS1, fifo_stat, ST25R3916_FIFO_STATUS_LEN);
uint16_t len =
((((uint16_t)fifo_stat[1] & ST25R3916_REG_FIFO_STATUS2_fifo_b_mask) >>
ST25R3916_REG_FIFO_STATUS2_fifo_b_shift)
<< RFAL_BITS_IN_BYTE);
len |= (((uint16_t)fifo_stat[0]) & 0x00FFU);
uint8_t rx[100];
st25r3916ReadFifo(rx, len);
tx_rx->rx_bits = len * 8;
memcpy(tx_rx->rx_data, rx, len);
ret = true;
} else {
FURI_LOG_E(TAG, "Timeout error");
ret = false;
}
st25r3916ClearInterrupts();
platformEnableIrqCallback();
return ret;
}
static uint32_t furi_hal_nfc_tx_rx_get_flag(FuriHalNfcTxRxType type) {
uint32_t flags = 0;
@@ -405,6 +482,9 @@ static uint32_t furi_hal_nfc_tx_rx_get_flag(FuriHalNfcTxRxType type) {
} else if(type == FuriHalNfcTxRxTypeRaw) {
flags = RFAL_TXRX_FLAGS_CRC_TX_MANUAL | RFAL_TXRX_FLAGS_CRC_RX_KEEP |
RFAL_TXRX_FLAGS_PAR_RX_KEEP | RFAL_TXRX_FLAGS_PAR_TX_NONE;
} else if(type == FuriHalNfcTxRxTypeRxRaw) {
flags = RFAL_TXRX_FLAGS_CRC_TX_MANUAL | RFAL_TXRX_FLAGS_CRC_RX_KEEP |
RFAL_TXRX_FLAGS_PAR_RX_KEEP | RFAL_TXRX_FLAGS_PAR_TX_NONE;
}
return flags;
@@ -470,6 +550,10 @@ bool furi_hal_nfc_tx_rx(FuriHalNfcTxRxContext* tx_rx, uint16_t timeout_ms) {
uint8_t* temp_rx_buff = NULL;
uint16_t* temp_rx_bits = NULL;
if(tx_rx->tx_rx_type == FuriHalNfcTxRxTransparent) {
return furi_hal_nfc_transparent_tx_rx(tx_rx, timeout_ms);
}
// Prepare data for FIFO if necessary
uint32_t flags = furi_hal_nfc_tx_rx_get_flag(tx_rx->tx_rx_type);
if(tx_rx->tx_rx_type == FuriHalNfcTxRxTypeRaw) {
@@ -502,7 +586,8 @@ bool furi_hal_nfc_tx_rx(FuriHalNfcTxRxContext* tx_rx, uint16_t timeout_ms) {
osDelay(1);
}
if(tx_rx->tx_rx_type == FuriHalNfcTxRxTypeRaw) {
if(tx_rx->tx_rx_type == FuriHalNfcTxRxTypeRaw ||
tx_rx->tx_rx_type == FuriHalNfcTxRxTypeRxRaw) {
tx_rx->rx_bits = 8 * furi_hal_nfc_bitstream_to_data_and_parity(
temp_rx_buff, *temp_rx_bits, tx_rx->rx_data, tx_rx->rx_parity);
} else {

5
firmware/targets/furi_hal_include/furi_hal_nfc.h
View File

@@ -10,6 +10,8 @@
#include <stdbool.h>
#include <stdint.h>
#include <lib/nfc_protocols/nfca.h>
#ifdef __cplusplus
extern "C" {
#endif
@@ -39,6 +41,8 @@ typedef enum {
FuriHalNfcTxRxTypeRxNoCrc,
FuriHalNfcTxRxTypeRxKeepPar,
FuriHalNfcTxRxTypeRaw,
FuriHalNfcTxRxTypeRxRaw,
FuriHalNfcTxRxTransparent,
} FuriHalNfcTxRxType;
typedef bool (*FuriHalNfcEmulateCallback)(
@@ -80,6 +84,7 @@ typedef struct {
uint8_t rx_parity[FURI_HAL_NFC_PARITY_BUFF_SIZE];
uint16_t rx_bits;
FuriHalNfcTxRxType tx_rx_type;
NfcaSignal* nfca_signal;
} FuriHalNfcTxRxContext;
/** Init nfc