NFC: add CTAS Andalucia reader

applications/main/nfc/application.fam

@@ -146,6 +146,15 @@ App(
     sources=["plugins/supported_cards/kazan.c"],
 )
 
+App(
+    appid="andalucia_parser",
+    apptype=FlipperAppType.PLUGIN,
+    entry_point="andalucia_plugin_ep",
+    targets=["f7"],
+    requires=["nfc"],
+    sources=["plugins/supported_cards/andalucia.c"],
+)
+
 App(
     appid="aime_parser",
     apptype=FlipperAppType.PLUGIN,

applications/main/nfc/plugins/supported_cards/andalucia.c

@@ -0,0 +1,133 @@
+#include "nfc_supported_card_plugin.h"
+#include <flipper_application.h>
+
+#include "protocols/mf_classic/mf_classic.h"
+#include <nfc/protocols/mf_classic/mf_classic_poller_sync.h>
+
+#include <bit_lib.h>
+
+#define TAG "Andalucia"
+
+static const uint64_t andalucia_key = 0x99100225D83B;
+static const uint8_t andalucia_sector = 9;
+
+bool andalucia_verify(Nfc* nfc) {
+    bool verified = false;
+
+    do {
+        uint8_t block_num = mf_classic_get_first_block_num_of_sector(andalucia_sector);
+        FURI_LOG_D(TAG, "Andalucia: Verifying sector %u", andalucia_sector);
+
+        MfClassicKey key = {};
+        bit_lib_num_to_bytes_be(andalucia_key, COUNT_OF(key.data), key.data);
+
+        MfClassicAuthContext auth_ctx = {};
+        MfClassicError error =
+            mf_classic_poller_sync_auth(nfc, block_num, &key, MfClassicKeyTypeA, &auth_ctx);
+
+        if(error != MfClassicErrorNone) {
+            FURI_LOG_D(TAG, "Andalucia: Failed to read block %u: %d", block_num, error);
+            break;
+        }
+
+        verified = true;
+    } while(false);
+
+    return verified;
+}
+
+static bool andalucia_read(Nfc* nfc, NfcDevice* device) {
+    furi_assert(nfc);
+    furi_assert(device);
+
+    bool is_read = false;
+
+    MfClassicData* data = mf_classic_alloc();
+    nfc_device_copy_data(device, NfcProtocolMfClassic, data);
+
+    do {
+        MfClassicType type = MfClassicType1k;
+        MfClassicError error = mf_classic_poller_sync_detect_type(nfc, &type);
+        if(error != MfClassicErrorNone) break;
+
+        data->type = type;
+        if(type != MfClassicType1k) break;
+
+        MfClassicDeviceKeys keys = {};
+        for(size_t i = 0; i < mf_classic_get_total_sectors_num(data->type); i++) {
+            bit_lib_num_to_bytes_be(andalucia_key, sizeof(MfClassicKey), keys.key_a[i].data);
+            FURI_BIT_SET(keys.key_a_mask, i);
+            bit_lib_num_to_bytes_be(andalucia_key, sizeof(MfClassicKey), keys.key_b[i].data);
+            FURI_BIT_SET(keys.key_b_mask, i);
+        }
+
+        error = mf_classic_poller_sync_read(nfc, &keys, data);
+        if(error == MfClassicErrorNotPresent) {
+            FURI_LOG_W(TAG, "Andalucia: Failed to read data");
+            break;
+        }
+
+        nfc_device_set_data(device, NfcProtocolMfClassic, data);
+
+        is_read = (error == MfClassicErrorNone);
+    } while(false);
+
+    mf_classic_free(data);
+
+    return is_read;
+}
+
+static bool andalucia_parse(const NfcDevice* device, FuriString* parsed_data) {
+    furi_assert(device);
+    furi_assert(parsed_data);
+
+    const MfClassicData* data = nfc_device_get_data(device, NfcProtocolMfClassic);
+
+    bool parsed = false;
+
+    do {
+        // Verify key
+        MfClassicSectorTrailer* sec_tr = mf_classic_get_sector_trailer_by_sector(data, andalucia_sector);
+        uint64_t key = bit_lib_bytes_to_num_be(sec_tr->key_a.data, 6);
+        if(key != andalucia_key) return false;
+
+        // Verify card type
+        if(data->type != MfClassicType1k) return false;
+
+        // Point to sector 9, block 1, value 0
+        const uint8_t* temp_ptr = &data->block[andalucia_sector * 4 + 1].data[0];
+        // Read first 4 bytes of block 0 of sector 4 from last to first and convert them to uint32_t
+        // 38 18 00 00 becomes 00 00 18 38, and equals to 6200 decimal
+        uint32_t balance =
+            ((temp_ptr[3] << 24) | (temp_ptr[2] << 16) | (temp_ptr[1] << 8) | temp_ptr[0]);
+
+        double eur = (balance / 2) / 100.0f;
+
+        furi_string_printf(
+            parsed_data, "\e#Andalucia\nBalance: %.2f euros.", eur);
+
+        parsed = true;
+    } while(false);
+
+    return parsed;
+}
+
+/* Actual implementation of app<>plugin interface */
+static const NfcSupportedCardsPlugin andalucia_plugin = {
+    .protocol = NfcProtocolMfClassic,
+    .verify = andalucia_verify,
+    .read = andalucia_read,
+    .parse = andalucia_parse,
+};
+
+/* Plugin descriptor to comply with basic plugin specification */
+static const FlipperAppPluginDescriptor andalucia_plugin_descriptor = {
+    .appid = NFC_SUPPORTED_CARD_PLUGIN_APP_ID,
+    .ep_api_version = NFC_SUPPORTED_CARD_PLUGIN_API_VERSION,
+    .entry_point = &andalucia_plugin,
+};
+
+/* Plugin entry point - must return a pointer to const descriptor  */
+const FlipperAppPluginDescriptor* andalucia_plugin_ep(void) {
+    return &andalucia_plugin_descriptor;
+}