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[FL-1526] Mifare Ultralight emulation (#645)

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* rfal: add discovery parameter for passing listen activation
* nfc: add discovery parameter to furi_hal_nfc_listen
* mifare_ul: add emulation parsing commands
* nfc: add mifare ul emulation
* nfc: switch to mifare ultralight emulation form menu
* furi-hal-nfc: add first frame reception in emulation mode
* nfc: change argument check
* nfc: rework nfc worker and mifare ul lib
* mifare_ul: add write and cnt increment commands
* nfc: add card modification check
* mifare_ul: add data changed flag
* nfc: add shodow files
* nfc: add restore original file

Co-authored-by: あく <alleteam@gmail.com>
This commit is contained in:
gornekich
2021-08-17 00:45:04 +03:00
committed by GitHub
parent e1d80d5402
commit c122317468
16 changed files with 354 additions and 69 deletions
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91
lib/nfc_protocols/mifare_ultralight.c
View File

@@ -137,3 +137,94 @@ uint16_t mf_ul_prepare_write(uint8_t* dest, uint16_t page_addr, uint32_t data) {
dest[5] = (uint8_t) data;
return 6;
}
void mf_ul_prepare_emulation(MifareUlDevice* mf_ul_emulate, MifareUlData* data) {
mf_ul_emulate->data = *data;
mf_ul_emulate->data_changed = false;
if(data->version.storage_size == 0) {
mf_ul_emulate->type = MfUltralightTypeUnknown;
mf_ul_emulate->support_fast_read = false;
} else if(data->version.storage_size == 0x0B) {
mf_ul_emulate->type = MfUltralightTypeUL11;
mf_ul_emulate->support_fast_read = true;
} else if(data->version.storage_size == 0x0E) {
mf_ul_emulate->type = MfUltralightTypeUL21;
mf_ul_emulate->support_fast_read = true;
}
}
uint16_t mf_ul_prepare_emulation_response(uint8_t* buff_rx, uint16_t len_rx, uint8_t* buff_tx, MifareUlDevice* mf_ul_emulate) {
uint8_t cmd = buff_rx[0];
uint16_t page_num = mf_ul_emulate->data.data_size / 4;
uint16_t tx_len = 0;
if(cmd == MF_UL_GET_VERSION_CMD) {
if(mf_ul_emulate->type != MfUltralightTypeUnknown) {
tx_len = sizeof(mf_ul_emulate->data.version);
memcpy(buff_tx, &mf_ul_emulate->data.version, tx_len);
}
} else if(cmd == MF_UL_READ_CMD) {
uint8_t start_page = buff_rx[1];
if(start_page < page_num) {
tx_len = 16;
if(start_page + 4 > page_num) {
// Handle roll-over mechanism
uint8_t end_pages_num = page_num - start_page;
memcpy(buff_tx, &mf_ul_emulate->data.data[start_page * 4], end_pages_num * 4);
memcpy(&buff_tx[end_pages_num * 4], mf_ul_emulate->data.data, (4 - end_pages_num) * 4);
} else {
memcpy(buff_tx, &mf_ul_emulate->data.data[start_page * 4], tx_len);
}
}
} else if(cmd == MF_UL_FAST_READ_CMD) {
if(mf_ul_emulate->support_fast_read) {
uint8_t start_page = buff_rx[1];
uint8_t end_page = buff_rx[2];
if((start_page < page_num) &&
(end_page < page_num) && (start_page < end_page)) {
tx_len = (end_page - start_page) * 4;
memcpy(buff_tx, &mf_ul_emulate->data.data[start_page * 4], tx_len);
}
}
} else if(cmd == MF_UL_WRITE) {
uint8_t write_page = buff_rx[1];
if((write_page > 1) && (write_page < page_num - 2)) {
memcpy(&mf_ul_emulate->data.data[write_page * 4], &buff_rx[2], 4);
mf_ul_emulate->data_changed = true;
// TODO make 4-bit ACK
buff_tx[0] = 0x0A;
tx_len = 1;
}
} else if(cmd == MF_UL_READ_CNT) {
uint8_t cnt_num = buff_rx[1];
if(cnt_num < 3) {
buff_tx[0] = mf_ul_emulate->data.counter[cnt_num] >> 16;
buff_tx[1] = mf_ul_emulate->data.counter[cnt_num] >> 8;
buff_tx[2] = mf_ul_emulate->data.counter[cnt_num];
tx_len = 3;
}
} else if(cmd == MF_UL_INC_CNT) {
uint8_t cnt_num = buff_rx[1];
uint32_t inc = (buff_rx[2] | (buff_rx[3] << 8) | (buff_rx[4] << 16));
if((cnt_num < 3) && (mf_ul_emulate->data.counter[cnt_num] + inc < 0x00FFFFFF)) {
mf_ul_emulate->data.counter[cnt_num] += inc;
mf_ul_emulate->data_changed = true;
// TODO make 4-bit ACK
buff_tx[0] = 0x0A;
tx_len = 1;
}
} else if(cmd == MF_UL_READ_SIG) {
// Check 2nd byte = 0x00 - RFU
if(buff_rx[1] == 0x00) {
tx_len = sizeof(mf_ul_emulate->data.signature);
memcpy(buff_tx, mf_ul_emulate->data.signature, tx_len);
}
} else if(cmd == MF_UL_CHECK_TEARING) {
uint8_t cnt_num = buff_rx[1];
if(cnt_num < 3) {
buff_tx[0] = mf_ul_emulate->data.tearing[cnt_num];
tx_len = 1;
}
}
return tx_len;
}

3
lib/nfc_protocols/mifare_ultralight.h
View File

@@ -65,6 +65,7 @@ typedef struct {
uint8_t pages_to_read;
uint8_t pages_readed;
bool support_fast_read;
bool data_changed;
MifareUlData data;
} MifareUlDevice;
@@ -93,3 +94,5 @@ void mf_ul_parse_fast_read_response(uint8_t* buff, uint8_t start_page, uint8_t e
uint16_t mf_ul_prepare_write(uint8_t* dest, uint16_t page_addr, uint32_t data);
void mf_ul_prepare_emulation(MifareUlDevice* mf_ul_emulate, MifareUlData* data);
uint16_t mf_ul_prepare_emulation_response(uint8_t* buff_rx, uint16_t len_rx, uint8_t* buff_tx, MifareUlDevice* mf_ul_emulate);