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NFC: Improvements to NFC Magic app (#2760)
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Ability to write gen1b tags (ignore 0x43)
Ability to write gen1 7 byte UID tags
Fix detection of non magic cards

Co-authored-by: あく <[email protected]>
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AloneLiberty and skotopes authored Jun 28, 2023
1 parent dcf1059 commit feebf2c
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Showing 4 changed files with 39 additions and 33 deletions.
1 change: 1 addition & 0 deletions applications/external/nfc_magic/nfc_magic_i.h
Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,7 @@ enum NfcMagicCustomEvent {
struct NfcMagicDevice {
MagicType type;
uint32_t cuid;
uint8_t uid_len;
uint32_t password;
};

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66 changes: 36 additions & 30 deletions applications/external/nfc_magic/nfc_magic_worker.c
Original file line number Diff line number Diff line change
Expand Up @@ -107,14 +107,7 @@ void nfc_magic_worker_write(NfcMagicWorker* nfc_magic_worker) {
}
magic_activate();
if(magic_gen1_wupa()) {
if(!magic_gen1_data_access_cmd()) {
FURI_LOG_E(
TAG, "No card response to data access command (not a magic card)");
nfc_magic_worker->callback(
NfcMagicWorkerEventWrongCard, nfc_magic_worker->context);
done = true;
break;
}
magic_gen1_data_access_cmd();

MfClassicData* mfc_data = &dev_data->mf_classic_data;
for(size_t i = 0; i < 64; i++) {
Expand Down Expand Up @@ -296,6 +289,7 @@ void nfc_magic_worker_write(NfcMagicWorker* nfc_magic_worker) {
}

void nfc_magic_worker_check(NfcMagicWorker* nfc_magic_worker) {
FuriHalNfcDevData nfc_data = {};
NfcMagicDevice* magic_dev = nfc_magic_worker->magic_dev;
bool card_found_notified = false;
uint8_t gen4_config[MAGIC_GEN4_CONFIG_LEN];
Expand All @@ -310,32 +304,44 @@ void nfc_magic_worker_check(NfcMagicWorker* nfc_magic_worker) {
card_found_notified = true;
}

furi_hal_nfc_activate_nfca(200, &magic_dev->cuid);
nfc_magic_worker->callback(NfcMagicWorkerEventSuccess, nfc_magic_worker->context);
break;
}

magic_deactivate();
furi_delay_ms(300);
magic_activate();

furi_hal_nfc_activate_nfca(200, &magic_dev->cuid);
if(magic_gen4_get_cfg(magic_dev->password, gen4_config)) {
magic_dev->type = MagicTypeGen4;
if(!card_found_notified) {
nfc_magic_worker->callback(
NfcMagicWorkerEventCardDetected, nfc_magic_worker->context);
card_found_notified = true;
if(furi_hal_nfc_detect(&nfc_data, 200)) {
magic_dev->cuid = nfc_data.cuid;
magic_dev->uid_len = nfc_data.uid_len;
} else {
// wrong BCC
magic_dev->uid_len = 4;
}

nfc_magic_worker->callback(NfcMagicWorkerEventSuccess, nfc_magic_worker->context);
break;
}
} else {
magic_deactivate();
magic_activate();
if(furi_hal_nfc_detect(&nfc_data, 200)) {
magic_dev->cuid = nfc_data.cuid;
magic_dev->uid_len = nfc_data.uid_len;
if(magic_gen4_get_cfg(magic_dev->password, gen4_config)) {
magic_dev->type = MagicTypeGen4;
if(!card_found_notified) {
nfc_magic_worker->callback(
NfcMagicWorkerEventCardDetected, nfc_magic_worker->context);
card_found_notified = true;
}

if(card_found_notified) {
nfc_magic_worker->callback(
NfcMagicWorkerEventNoCardDetected, nfc_magic_worker->context);
card_found_notified = false;
nfc_magic_worker->callback(
NfcMagicWorkerEventSuccess, nfc_magic_worker->context);
} else {
nfc_magic_worker->callback(
NfcMagicWorkerEventWrongCard, nfc_magic_worker->context);
card_found_notified = true;
}
break;
} else {
if(card_found_notified) {
nfc_magic_worker->callback(
NfcMagicWorkerEventNoCardDetected, nfc_magic_worker->context);
card_found_notified = false;
}
}
}

magic_deactivate();
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Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,7 @@ static bool nfc_magic_scene_file_select_is_file_suitable(NfcMagic* nfc_magic) {
case MagicTypeClassicDirectWrite:
case MagicTypeClassicAPDU:
if((nfc_dev->dev_data.mf_classic_data.type != MfClassicType1k) ||
(nfc_dev->dev_data.nfc_data.uid_len != 4)) {
(nfc_dev->dev_data.nfc_data.uid_len != nfc_magic->dev->uid_len)) {
return false;
}
return true;
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Original file line number Diff line number Diff line change
Expand Up @@ -13,11 +13,10 @@ void nfc_magic_scene_not_magic_on_enter(void* context) {

notification_message(nfc_magic->notifications, &sequence_error);

// widget_add_icon_element(widget, 73, 17, &I_DolphinCommon_56x48);
widget_add_string_element(
widget, 3, 4, AlignLeft, AlignTop, FontPrimary, "This is wrong card");
widget_add_string_multiline_element(
widget, 4, 17, AlignLeft, AlignTop, FontSecondary, "Not a magic\ncard");
widget, 4, 17, AlignLeft, AlignTop, FontSecondary, "Not magic or unsupported\ncard");
widget_add_button_element(
widget, GuiButtonTypeLeft, "Retry", nfc_magic_scene_not_magic_widget_callback, nfc_magic);

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