diff --git a/applications/main/nfc/helpers/protocol_support/mf_ultralight/mf_ultralight.c b/applications/main/nfc/helpers/protocol_support/mf_ultralight/mf_ultralight.c index 3adf2a1f5..6edbc06a2 100644 --- a/applications/main/nfc/helpers/protocol_support/mf_ultralight/mf_ultralight.c +++ b/applications/main/nfc/helpers/protocol_support/mf_ultralight/mf_ultralight.c @@ -166,15 +166,26 @@ static void nfc_scene_read_on_enter_mf_ultralight(NfcApp* instance) { bool nfc_scene_read_on_event_mf_ultralight(NfcApp* instance, SceneManagerEvent event) { if(event.type == SceneManagerEventTypeCustom) { - if(event.event == NfcCustomEventCardDetected) { - nfc_unlock_helper_card_detected_handler(instance); - } else if(event.event == NfcCustomEventPollerIncomplete) { - notification_message(instance->notifications, &sequence_semi_success); + if(event.event == NfcCustomEventPollerSuccess) { + notification_message(instance->notifications, &sequence_success); scene_manager_next_scene(instance->scene_manager, NfcSceneReadSuccess); dolphin_deed(DolphinDeedNfcReadSuccess); + return true; + } else if(event.event == NfcCustomEventPollerIncomplete) { + const MfUltralightData* data = + nfc_device_get_data(instance->nfc_device, NfcProtocolMfUltralight); + if(data->type == MfUltralightTypeMfulC) { + // Start dict attack for MFUL C cards + scene_manager_next_scene(instance->scene_manager, NfcSceneMfUltralightCDictAttack); + } else { + notification_message(instance->notifications, &sequence_success); + scene_manager_next_scene(instance->scene_manager, NfcSceneReadSuccess); + dolphin_deed(DolphinDeedNfcReadSuccess); + } + return true; } } - return true; + return false; } static void nfc_scene_read_and_saved_menu_on_enter_mf_ultralight(NfcApp* instance) { diff --git a/applications/main/nfc/nfc_app_i.h b/applications/main/nfc/nfc_app_i.h index 14e484622..e13af79aa 100644 --- a/applications/main/nfc/nfc_app_i.h +++ b/applications/main/nfc/nfc_app_i.h @@ -47,6 +47,7 @@ #include #include #include +#include #include #include @@ -80,6 +81,10 @@ #define NFC_APP_MF_CLASSIC_DICT_SYSTEM_PATH (NFC_APP_FOLDER "/assets/mf_classic_dict.nfc") #define NFC_APP_MF_CLASSIC_DICT_SYSTEM_NESTED_PATH \ (NFC_APP_FOLDER "/assets/mf_classic_dict_nested.nfc") +#define NFC_APP_MF_ULTRALIGHT_C_DICT_USER_PATH \ + (NFC_APP_FOLDER "/assets/mf_ultralight_c_dict_user.nfc") +#define NFC_APP_MF_ULTRALIGHT_C_DICT_SYSTEM_PATH \ + (NFC_APP_FOLDER "/assets/mf_ultralight_c_dict.nfc") typedef enum { NfcRpcStateIdle, @@ -105,6 +110,14 @@ typedef struct { bool enhanced_dict; } NfcMfClassicDictAttackContext; +typedef struct { + KeysDict* dict; + bool auth_success; + bool is_card_present; + size_t dict_keys_total; + size_t dict_keys_current; +} NfcMfUltralightCDictContext; + struct NfcApp { DialogsApp* dialogs; Storage* storage; @@ -143,6 +156,7 @@ struct NfcApp { MfUltralightAuth* mf_ul_auth; SlixUnlock* slix_unlock; NfcMfClassicDictAttackContext nfc_dict_context; + NfcMfUltralightCDictContext mf_ultralight_c_dict_context; Mfkey32Logger* mfkey32_logger; MfUserDict* mf_user_dict; MfClassicKeyCache* mfc_key_cache; diff --git a/applications/main/nfc/resources/nfc/assets/mf_ul_c_dict.nfc b/applications/main/nfc/resources/nfc/assets/mf_ultralight_c_dict.nfc similarity index 100% rename from applications/main/nfc/resources/nfc/assets/mf_ul_c_dict.nfc rename to applications/main/nfc/resources/nfc/assets/mf_ultralight_c_dict.nfc diff --git a/applications/main/nfc/scenes/nfc_scene_config.h b/applications/main/nfc/scenes/nfc_scene_config.h index 83c8ffeed..1b9d4367d 100644 --- a/applications/main/nfc/scenes/nfc_scene_config.h +++ b/applications/main/nfc/scenes/nfc_scene_config.h @@ -25,6 +25,7 @@ ADD_SCENE(nfc, retry_confirm, RetryConfirm) ADD_SCENE(nfc, exit_confirm, ExitConfirm) ADD_SCENE(nfc, save_confirm, SaveConfirm) +ADD_SCENE(nfc, mf_ultralight_c_dict_attack, MfUltralightCDictAttack) ADD_SCENE(nfc, mf_ultralight_write, MfUltralightWrite) ADD_SCENE(nfc, mf_ultralight_write_success, MfUltralightWriteSuccess) ADD_SCENE(nfc, mf_ultralight_write_fail, MfUltralightWriteFail) diff --git a/applications/main/nfc/scenes/nfc_scene_extra_actions.c b/applications/main/nfc/scenes/nfc_scene_extra_actions.c index 2943c0c55..5753d6449 100644 --- a/applications/main/nfc/scenes/nfc_scene_extra_actions.c +++ b/applications/main/nfc/scenes/nfc_scene_extra_actions.c @@ -3,6 +3,7 @@ enum SubmenuIndex { SubmenuIndexReadCardType, SubmenuIndexMfClassicKeys, + SubmenuIndexMfUlCKeys, SubmenuIndexMfUltralightUnlock, SubmenuIndexSlixUnlock, }; @@ -29,6 +30,12 @@ void nfc_scene_extra_actions_on_enter(void* context) { SubmenuIndexMfClassicKeys, nfc_scene_extra_actions_submenu_callback, instance); + submenu_add_item( + submenu, + "MIFARE Ultralight C Keys", + SubmenuIndexMfUlCKeys, + nfc_scene_extra_actions_submenu_callback, + instance); submenu_add_item( submenu, "Unlock NTAG/Ultralight", @@ -54,6 +61,9 @@ bool nfc_scene_extra_actions_on_event(void* context, SceneManagerEvent event) { if(event.event == SubmenuIndexMfClassicKeys) { scene_manager_next_scene(instance->scene_manager, NfcSceneMfClassicKeys); consumed = true; + } else if(event.event == SubmenuIndexMfUlCKeys) { + // TODO: Add MFUL C key management scene here + consumed = true; } else if(event.event == SubmenuIndexMfUltralightUnlock) { mf_ultralight_auth_reset(instance->mf_ul_auth); scene_manager_next_scene(instance->scene_manager, NfcSceneMfUltralightUnlockMenu); diff --git a/applications/main/nfc/scenes/nfc_scene_mf_ultralight_c_dict_attack.c b/applications/main/nfc/scenes/nfc_scene_mf_ultralight_c_dict_attack.c new file mode 100644 index 000000000..d1b2c0978 --- /dev/null +++ b/applications/main/nfc/scenes/nfc_scene_mf_ultralight_c_dict_attack.c @@ -0,0 +1,202 @@ +#include "../nfc_app_i.h" +#include + +#define TAG "NfcMfUlCDictAttack" + +enum { + DictAttackStateUserDictInProgress, + DictAttackStateSystemDictInProgress, +}; + +NfcCommand nfc_mf_ultralight_c_dict_attack_worker_callback(NfcGenericEvent event, void* context) { + furi_assert(context); + furi_assert(event.event_data); + furi_assert(event.protocol == NfcProtocolMfUltralight); + NfcCommand command = NfcCommandContinue; + NfcApp* instance = context; + MfUltralightPollerEvent* poller_event = event.event_data; + + if(poller_event->type == MfUltralightPollerEventTypeRequestMode) { + poller_event->data->poller_mode = MfUltralightPollerModeDictAttack; + command = NfcCommandContinue; + } else if(poller_event->type == MfUltralightPollerEventTypeRequestKey) { + MfUltralightC3DesAuthKey key = {}; + if(keys_dict_get_next_key( + instance->mf_ultralight_c_dict_context.dict, + key.data, + sizeof(MfUltralightC3DesAuthKey))) { + poller_event->data->key_request_data.key = key; + poller_event->data->key_request_data.key_provided = true; + instance->mf_ultralight_c_dict_context.dict_keys_current++; + + if(instance->mf_ultralight_c_dict_context.dict_keys_current % 10 == 0) { + view_dispatcher_send_custom_event( + instance->view_dispatcher, NfcCustomEventDictAttackDataUpdate); + } + } else { + poller_event->data->key_request_data.key_provided = false; + } + } else if(poller_event->type == MfUltralightPollerEventTypeReadSuccess) { + nfc_device_set_data( + instance->nfc_device, NfcProtocolMfUltralight, nfc_poller_get_data(instance->poller)); + view_dispatcher_send_custom_event( + instance->view_dispatcher, NfcCustomEventDictAttackComplete); + command = NfcCommandStop; + } + return command; +} + +void nfc_scene_mf_ultralight_c_dict_attack_dict_attack_result_callback( + DictAttackEvent event, + void* context) { + furi_assert(context); + NfcApp* instance = context; + if(event == DictAttackEventSkipPressed) { + view_dispatcher_send_custom_event(instance->view_dispatcher, NfcCustomEventDictAttackSkip); + } +} + +void nfc_scene_mf_ultralight_c_dict_attack_prepare_view(NfcApp* instance) { + uint32_t state = + scene_manager_get_scene_state(instance->scene_manager, NfcSceneMfUltralightCDictAttack); + if(state == DictAttackStateUserDictInProgress) { + do { + if(!keys_dict_check_presence(NFC_APP_MF_ULTRALIGHT_C_DICT_USER_PATH)) { + state = DictAttackStateSystemDictInProgress; + break; + } + instance->mf_ultralight_c_dict_context.dict = keys_dict_alloc( + NFC_APP_MF_ULTRALIGHT_C_DICT_USER_PATH, + KeysDictModeOpenAlways, + sizeof(MfUltralightC3DesAuthKey)); + if(keys_dict_get_total_keys(instance->mf_ultralight_c_dict_context.dict) == 0) { + keys_dict_free(instance->mf_ultralight_c_dict_context.dict); + state = DictAttackStateSystemDictInProgress; + break; + } + dict_attack_set_header(instance->dict_attack, "MFUL C User Dictionary"); + } while(false); + } + if(state == DictAttackStateSystemDictInProgress) { + instance->mf_ultralight_c_dict_context.dict = keys_dict_alloc( + NFC_APP_MF_ULTRALIGHT_C_DICT_SYSTEM_PATH, + KeysDictModeOpenExisting, + sizeof(MfUltralightC3DesAuthKey)); + dict_attack_set_header(instance->dict_attack, "MFUL C System Dictionary"); + } + + instance->mf_ultralight_c_dict_context.dict_keys_total = + keys_dict_get_total_keys(instance->mf_ultralight_c_dict_context.dict); + dict_attack_set_total_dict_keys( + instance->dict_attack, instance->mf_ultralight_c_dict_context.dict_keys_total); + instance->mf_ultralight_c_dict_context.dict_keys_current = 0; + dict_attack_set_callback( + instance->dict_attack, + nfc_scene_mf_ultralight_c_dict_attack_dict_attack_result_callback, + instance); + scene_manager_set_scene_state(instance->scene_manager, NfcSceneMfUltralightCDictAttack, state); +} + +void nfc_scene_mf_ultralight_c_dict_attack_on_enter(void* context) { + NfcApp* instance = context; + + scene_manager_set_scene_state( + instance->scene_manager, + NfcSceneMfUltralightCDictAttack, + DictAttackStateUserDictInProgress); + nfc_scene_mf_ultralight_c_dict_attack_prepare_view(instance); + + // Setup and start worker + instance->poller = nfc_poller_alloc(instance->nfc, NfcProtocolMfUltralight); + nfc_poller_start(instance->poller, nfc_mf_ultralight_c_dict_attack_worker_callback, instance); + + nfc_blink_read_start(instance); +} + +void nfc_scene_mf_ul_c_dict_attack_update_view(NfcApp* instance) { + dict_attack_set_card_state( + instance->dict_attack, instance->mf_ultralight_c_dict_context.is_card_present); + dict_attack_set_current_dict_key( + instance->dict_attack, instance->mf_ultralight_c_dict_context.dict_keys_current); +} + +bool nfc_scene_mf_ultralight_c_dict_attack_on_event(void* context, SceneManagerEvent event) { + NfcApp* instance = context; + bool consumed = false; + + uint32_t state = + scene_manager_get_scene_state(instance->scene_manager, NfcSceneMfUltralightCDictAttack); + + if(event.type == SceneManagerEventTypeCustom) { + if(event.event == NfcCustomEventDictAttackComplete) { + if(state == DictAttackStateUserDictInProgress) { + nfc_poller_stop(instance->poller); + nfc_poller_free(instance->poller); + keys_dict_free(instance->mf_ultralight_c_dict_context.dict); + scene_manager_set_scene_state( + instance->scene_manager, + NfcSceneMfUltralightCDictAttack, + DictAttackStateSystemDictInProgress); + nfc_scene_mf_ultralight_c_dict_attack_prepare_view(instance); + instance->poller = nfc_poller_alloc(instance->nfc, NfcProtocolMfUltralight); + nfc_poller_start( + instance->poller, nfc_mf_ultralight_c_dict_attack_worker_callback, instance); + consumed = true; + } else { + notification_message(instance->notifications, &sequence_success); + scene_manager_next_scene(instance->scene_manager, NfcSceneReadSuccess); + dolphin_deed(DolphinDeedNfcReadSuccess); + consumed = true; + } + } else if(event.event == NfcCustomEventDictAttackDataUpdate) { + dict_attack_set_current_dict_key( + instance->dict_attack, instance->mf_ultralight_c_dict_context.dict_keys_current); + consumed = true; + } else if(event.event == NfcCustomEventDictAttackSkip) { + if(instance->mf_ultralight_c_dict_context.is_card_present) { + if(state == DictAttackStateUserDictInProgress) { + nfc_poller_stop(instance->poller); + nfc_poller_free(instance->poller); + keys_dict_free(instance->mf_ultralight_c_dict_context.dict); + scene_manager_set_scene_state( + instance->scene_manager, + NfcSceneMfUltralightCDictAttack, + DictAttackStateSystemDictInProgress); + nfc_scene_mf_ultralight_c_dict_attack_prepare_view(instance); + instance->poller = nfc_poller_alloc(instance->nfc, NfcProtocolMfUltralight); + nfc_poller_start( + instance->poller, + nfc_mf_ultralight_c_dict_attack_worker_callback, + instance); + } else { + nfc_poller_stop(instance->poller); + nfc_poller_free(instance->poller); + notification_message(instance->notifications, &sequence_success); + scene_manager_next_scene(instance->scene_manager, NfcSceneReadSuccess); + dolphin_deed(DolphinDeedNfcReadSuccess); + } + consumed = true; + } + } + } else if(event.type == SceneManagerEventTypeBack) { + scene_manager_next_scene(instance->scene_manager, NfcSceneExitConfirm); + consumed = true; + } + return consumed; +} + +void nfc_scene_mf_ultralight_c_dict_attack_on_exit(void* context) { + NfcApp* instance = context; + nfc_poller_stop(instance->poller); + nfc_poller_free(instance->poller); + scene_manager_set_scene_state( + instance->scene_manager, + NfcSceneMfUltralightCDictAttack, + DictAttackStateUserDictInProgress); + keys_dict_free(instance->mf_ultralight_c_dict_context.dict); + instance->mf_ultralight_c_dict_context.dict_keys_total = 0; + instance->mf_ultralight_c_dict_context.dict_keys_current = 0; + instance->mf_ultralight_c_dict_context.auth_success = false; + instance->mf_ultralight_c_dict_context.is_card_present = false; + nfc_blink_stop(instance); +} diff --git a/lib/nfc/protocols/mf_ultralight/mf_ultralight_poller.c b/lib/nfc/protocols/mf_ultralight/mf_ultralight_poller.c index 0e5ff0011..08136041c 100644 --- a/lib/nfc/protocols/mf_ultralight/mf_ultralight_poller.c +++ b/lib/nfc/protocols/mf_ultralight/mf_ultralight_poller.c @@ -181,6 +181,10 @@ MfUltralightPoller* mf_ultralight_poller_alloc(Iso14443_3aPoller* iso14443_3a_po instance->general_event.protocol = NfcProtocolMfUltralight; instance->general_event.event_data = &instance->mfu_event; instance->general_event.instance = instance; + + instance->dict_attack_ctx.auth_success = false; + instance->dict_attack_ctx.is_card_present = false; + mbedtls_des3_init(&instance->des_context); return instance; } @@ -521,7 +525,7 @@ static NfcCommand mf_ultralight_poller_handler_read_pages(MfUltralightPoller* in } else { if(instance->data->type == MfUltralightTypeMfulC && !mf_ultralight_3des_key_valid(instance->data)) { - instance->state = MfUltralightPollerStateCheckMfulCAuthStatus; + instance->state = MfUltralightPollerStateDictAttack; } else { FURI_LOG_D(TAG, "Read page %d failed", instance->pages_read); if(instance->pages_read) { @@ -730,6 +734,63 @@ static NfcCommand mf_ultralight_poller_handler_write_success(MfUltralightPoller* return command; } +static NfcCommand mf_ultralight_poller_handler_dict_attack(MfUltralightPoller* instance) { + NfcCommand command = NfcCommandContinue; + const MfUltralightData* tag_data = instance->data; + uint32_t features = mf_ultralight_get_feature_support_set(tag_data->type); + FURI_LOG_D(TAG, "Dict Attack"); + do { + if(!mf_ultralight_support_feature(features, MfUltralightFeatureSupportAuthenticate)) { + instance->error = MfUltralightErrorProtocol; + instance->state = MfUltralightPollerStateReadFailed; + break; + } + + instance->dict_attack_ctx.is_card_present = true; + instance->mfu_event.type = MfUltralightPollerEventTypeRequestKey; + command = instance->callback(instance->general_event, instance->context); + if(!instance->mfu_event.data->key_request_data.key_provided) { + instance->state = MfUltralightPollerStateReadSuccess; + break; + } + + FURI_LOG_D(TAG, "Trying next 3DES key"); + instance->error = MfUltralightErrorNone; + instance->auth_context.auth_success = false; + instance->auth_context.tdes_key = instance->mfu_event.data->key_request_data.key; + do { + uint8_t output[MF_ULTRALIGHT_C_AUTH_DATA_SIZE]; + uint8_t RndA[MF_ULTRALIGHT_C_AUTH_RND_BLOCK_SIZE] = {0}; + furi_hal_random_fill_buf(RndA, sizeof(RndA)); + instance->error = mf_ultralight_poller_authenticate_start(instance, RndA, output); + if(instance->error != MfUltralightErrorNone) break; + + uint8_t decoded_shifted_RndA[MF_ULTRALIGHT_C_AUTH_RND_BLOCK_SIZE] = {0}; + const uint8_t* RndB = output + MF_ULTRALIGHT_C_AUTH_RND_B_BLOCK_OFFSET; + instance->error = mf_ultralight_poller_authenticate_end( + instance, RndB, output, decoded_shifted_RndA); + if(instance->error != MfUltralightErrorNone) break; + + mf_ultralight_3des_shift_data(RndA); + instance->auth_context.auth_success = + (memcmp(RndA, decoded_shifted_RndA, sizeof(decoded_shifted_RndA)) == 0); + if(instance->auth_context.auth_success) { + FURI_LOG_D(TAG, "Dict attack success"); + instance->state = MfUltralightPollerStateReadPages; + instance->dict_attack_ctx.auth_success = true; + break; + } + } while(false); + + if(!instance->auth_context.auth_success) { + FURI_LOG_D(TAG, "Dict attack auth failed"); + iso14443_3a_poller_halt(instance->iso14443_3a_poller); + } + } while(false); + + return command; +} + static const MfUltralightPollerReadHandler mf_ultralight_poller_read_handler[MfUltralightPollerStateNum] = { [MfUltralightPollerStateIdle] = mf_ultralight_poller_handler_idle, @@ -755,6 +816,7 @@ static const MfUltralightPollerReadHandler [MfUltralightPollerStateWritePages] = mf_ultralight_poller_handler_write_pages, [MfUltralightPollerStateWriteFail] = mf_ultralight_poller_handler_write_fail, [MfUltralightPollerStateWriteSuccess] = mf_ultralight_poller_handler_write_success, + [MfUltralightPollerStateDictAttack] = mf_ultralight_poller_handler_dict_attack, }; diff --git a/lib/nfc/protocols/mf_ultralight/mf_ultralight_poller.h b/lib/nfc/protocols/mf_ultralight/mf_ultralight_poller.h index e50017324..2552abeb5 100644 --- a/lib/nfc/protocols/mf_ultralight/mf_ultralight_poller.h +++ b/lib/nfc/protocols/mf_ultralight/mf_ultralight_poller.h @@ -27,6 +27,7 @@ typedef enum { MfUltralightPollerEventTypeCardLocked, /**< Presented card is locked by password, AUTH0 or lock bytes. */ MfUltralightPollerEventTypeWriteSuccess, /**< Poller wrote card successfully. */ MfUltralightPollerEventTypeWriteFail, /**< Poller failed to write card. */ + MfUltralightPollerEventTypeRequestKey, /**< Poller requests key for dict attack. */ } MfUltralightPollerEventType; /** @@ -35,6 +36,7 @@ typedef enum { typedef enum { MfUltralightPollerModeRead, /**< Poller will only read card. It's a default mode. */ MfUltralightPollerModeWrite, /**< Poller will write already saved card to another presented card. */ + MfUltralightPollerModeDictAttack, /**< Poller will perform dictionary attack against card. */ } MfUltralightPollerMode; /** @@ -42,20 +44,29 @@ typedef enum { */ typedef struct { MfUltralightAuthPassword password; /**< Password to be used for authentication. */ - MfUltralightC3DesAuthKey tdes_key; - MfUltralightAuthPack pack; /**< Pack received on successfull authentication. */ + MfUltralightC3DesAuthKey tdes_key; /**< 3DES key to be used for authentication. */ + MfUltralightAuthPack pack; /**< Pack received on successful authentication. */ bool auth_success; /**< Set to true if authentication succeeded, false otherwise. */ bool skip_auth; /**< Set to true if authentication should be skipped, false otherwise. */ } MfUltralightPollerAuthContext; +/** + * @brief MfUltralight poller key request data. + */ +typedef struct { + MfUltralightC3DesAuthKey key; /**< Key to try. */ + bool key_provided; /**< Set to true if key was provided, false to stop attack. */ +} MfUltralightPollerKeyRequestData; + /** * @brief MfUltralight poller event data. */ typedef union { MfUltralightPollerAuthContext auth_context; /**< Authentication context. */ MfUltralightError error; /**< Error code indicating reading fail reason. */ - const MfUltralightData* write_data; - MfUltralightPollerMode poller_mode; + const MfUltralightData* write_data; /**< Data to be written to card. */ + MfUltralightPollerMode poller_mode; /**< Mode to operate in. */ + MfUltralightPollerKeyRequestData key_request_data; /**< Key request data. */ } MfUltralightPollerEventData; /** @@ -64,7 +75,7 @@ typedef union { * Upon emission of an event, an instance of this struct will be passed to the callback. */ typedef struct { - MfUltralightPollerEventType type; /**< Type of emmitted event. */ + MfUltralightPollerEventType type; /**< Type of emitted event. */ MfUltralightPollerEventData* data; /**< Pointer to event specific data. */ } MfUltralightPollerEvent; diff --git a/lib/nfc/protocols/mf_ultralight/mf_ultralight_poller_i.h b/lib/nfc/protocols/mf_ultralight/mf_ultralight_poller_i.h index b35c49aea..bbd9c6c3e 100644 --- a/lib/nfc/protocols/mf_ultralight/mf_ultralight_poller_i.h +++ b/lib/nfc/protocols/mf_ultralight/mf_ultralight_poller_i.h @@ -68,10 +68,17 @@ typedef enum { MfUltralightPollerStateWritePages, MfUltralightPollerStateWriteFail, MfUltralightPollerStateWriteSuccess, + MfUltralightPollerStateDictAttack, MfUltralightPollerStateNum, } MfUltralightPollerState; +typedef struct { + uint8_t sectors_total; + bool auth_success; + bool is_card_present; +} MfUltralightPollerDictAttackContext; + struct MfUltralightPoller { Iso14443_3aPoller* iso14443_3a_poller; MfUltralightPollerState state; @@ -89,6 +96,7 @@ struct MfUltralightPoller { uint8_t tearing_flag_total; uint16_t current_page; MfUltralightError error; + MfUltralightPollerDictAttackContext dict_attack_ctx; mbedtls_des3_context des_context; NfcGenericEvent general_event;