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| 1 | +#include "nfc_supported_card_plugin.h" |
| 2 | + |
| 3 | +#include <flipper_application/flipper_application.h> |
| 4 | + |
| 5 | +#include <nfc/nfc_device.h> |
| 6 | +#include <bit_lib/bit_lib.h> |
| 7 | +#include <nfc/protocols/mf_classic/mf_classic_poller_sync.h> |
| 8 | + |
| 9 | +#define TAG "Banapass" |
| 10 | + |
| 11 | +static const uint64_t banapass_key_b_value_block = 0x019761AA8082; |
| 12 | +static const uint64_t banapass_key_b_access_code = 0x574343467632; |
| 13 | +typedef struct { |
| 14 | + uint64_t a; |
| 15 | + uint64_t b; |
| 16 | +} MfClassicKeyPair; |
| 17 | + |
| 18 | +static MfClassicKeyPair banapass_keys_if_value_block[] = { |
| 19 | + {.a = 0x6090D00632F5, .b = 0x019761AA8082}, |
| 20 | + {.a = 0xA99164400748, .b = 0x62742819AD7C}, |
| 21 | + {.a = 0xCC5075E42BA1, .b = 0xB9DF35A0814C}, |
| 22 | + {.a = 0x8AF9C718F23D, .b = 0x58CD5C3673CB}, |
| 23 | + {.a = 0xFC80E88EB88C, .b = 0x7A3CDAD7C023}, |
| 24 | + {.a = 0x30424C029001, .b = 0x024E4E44001F}, |
| 25 | + {.a = 0xECBBFA57C6AD, .b = 0x4757698143BD}, |
| 26 | + {.a = 0x1D30972E6485, .b = 0xF8526D1A8D6D}, |
| 27 | + {.a = 0x1300EC8C7E80, .b = 0xF80A65A87FFA}, |
| 28 | + {.a = 0xDEB06ED4AF8E, .b = 0x4AD96BF28190}, |
| 29 | + {.a = 0x000390014D41, .b = 0x0800F9917CB0}, |
| 30 | + {.a = 0x730050555253, .b = 0x4146D4A956C4}, |
| 31 | + {.a = 0x131157FBB126, .b = 0xE69DD9015A43}, |
| 32 | + {.a = 0x337237F254D5, .b = 0x9A8389F32FBF}, |
| 33 | + {.a = 0x7B8FB4A7100B, .b = 0xC8382A233993}, |
| 34 | + {.a = 0x7B304F2A12A6, .b = 0xFC9418BF788B}, |
| 35 | +}; |
| 36 | + |
| 37 | +static MfClassicKeyPair banapass_keys_if_access_code[] = { |
| 38 | + {.a = 0x6090D00632F5, .b = 0x574343467632}, |
| 39 | + {.a = 0xA99164400748, .b = 0x62742819AD7C}, |
| 40 | + {.a = 0xCC5075E42BA1, .b = 0xB9DF35A0814C}, |
| 41 | + {.a = 0x8AF9C718F23D, .b = 0x58CD5C3673CB}, |
| 42 | + {.a = 0xFC80E88EB88C, .b = 0x7A3CDAD7C023}, |
| 43 | + {.a = 0x30424C029001, .b = 0x024E4E44001F}, |
| 44 | + {.a = 0xECBBFA57C6AD, .b = 0x4757698143BD}, |
| 45 | + {.a = 0x1D30972E6485, .b = 0xF8526D1A8D6D}, |
| 46 | + {.a = 0x1300EC8C7E80, .b = 0xF80A65A87FFA}, |
| 47 | + {.a = 0xDEB06ED4AF8E, .b = 0x4AD96BF28190}, |
| 48 | + {.a = 0x000390014D41, .b = 0x0800F9917CB0}, |
| 49 | + {.a = 0x730050555253, .b = 0x4146D4A956C4}, |
| 50 | + {.a = 0x131157FBB126, .b = 0xE69DD9015A43}, |
| 51 | + {.a = 0x337237F254D5, .b = 0x9A8389F32FBF}, |
| 52 | + {.a = 0x7B8FB4A7100B, .b = 0xC8382A233993}, |
| 53 | + {.a = 0x7B304F2A12A6, .b = 0xFC9418BF788B}, |
| 54 | +}; |
| 55 | + |
| 56 | +static bool banapass_verify(Nfc* nfc) { |
| 57 | + bool verified = true; |
| 58 | + |
| 59 | + const uint8_t verify_sector = 0; |
| 60 | + uint8_t block_num = mf_classic_get_first_block_num_of_sector(verify_sector); |
| 61 | + FURI_LOG_D(TAG, "Verifying sector %u", verify_sector); |
| 62 | + |
| 63 | + MfClassicKey key_a_0 = {}; |
| 64 | + bit_lib_num_to_bytes_be( |
| 65 | + banapass_keys_if_value_block[0].a, COUNT_OF(key_a_0.data), key_a_0.data); |
| 66 | + |
| 67 | + MfClassicAuthContext auth_ctx = {}; |
| 68 | + MfClassicError error = |
| 69 | + mf_classic_poller_sync_auth(nfc, block_num, &key_a_0, MfClassicKeyTypeA, &auth_ctx); |
| 70 | + |
| 71 | + if(error != MfClassicErrorNone) { |
| 72 | + FURI_LOG_D(TAG, "Failed to read block %u: %d", block_num, error); |
| 73 | + verified = false; |
| 74 | + } |
| 75 | + |
| 76 | + return verified; |
| 77 | +} |
| 78 | + |
| 79 | +static bool banapass_read(Nfc* nfc, NfcDevice* device) { |
| 80 | + furi_assert(nfc); |
| 81 | + furi_assert(device); |
| 82 | + |
| 83 | + bool is_read = false; |
| 84 | + |
| 85 | + MfClassicData* data = mf_classic_alloc(); |
| 86 | + nfc_device_copy_data(device, NfcProtocolMfClassic, data); |
| 87 | + |
| 88 | + do { |
| 89 | + MfClassicType type = MfClassicType1k; |
| 90 | + MfClassicError error = mf_classic_poller_sync_detect_type(nfc, &type); |
| 91 | + if(error != MfClassicErrorNone) break; |
| 92 | + if(type != MfClassicType1k) { |
| 93 | + FURI_LOG_E(TAG, "Card not MIFARE Classic 1k"); |
| 94 | + break; |
| 95 | + } |
| 96 | + |
| 97 | + data->type = type; |
| 98 | + MfClassicDeviceKeys keys = {}; |
| 99 | + |
| 100 | + // Access Code Read Attempt |
| 101 | + for(size_t i = 0; i < mf_classic_get_total_sectors_num(data->type); i++) { |
| 102 | + bit_lib_num_to_bytes_be( |
| 103 | + banapass_keys_if_access_code[i].a, sizeof(MfClassicKey), keys.key_a[i].data); |
| 104 | + FURI_BIT_SET(keys.key_a_mask, i); |
| 105 | + bit_lib_num_to_bytes_be( |
| 106 | + banapass_keys_if_access_code[i].b, sizeof(MfClassicKey), keys.key_b[i].data); |
| 107 | + FURI_BIT_SET(keys.key_b_mask, i); |
| 108 | + } |
| 109 | + |
| 110 | + MfClassicError error_access_code = mf_classic_poller_sync_read(nfc, &keys, data); |
| 111 | + |
| 112 | + if(error_access_code == MfClassicErrorNone) { |
| 113 | + nfc_device_set_data(device, NfcProtocolMfClassic, data); |
| 114 | + is_read = true; |
| 115 | + break; |
| 116 | + } |
| 117 | + |
| 118 | + // Value Block Read Attempt |
| 119 | + for(size_t i = 0; i < mf_classic_get_total_sectors_num(data->type); i++) { |
| 120 | + bit_lib_num_to_bytes_be( |
| 121 | + banapass_keys_if_value_block[i].a, sizeof(MfClassicKey), keys.key_a[i].data); |
| 122 | + FURI_BIT_SET(keys.key_a_mask, i); |
| 123 | + bit_lib_num_to_bytes_be( |
| 124 | + banapass_keys_if_value_block[i].b, sizeof(MfClassicKey), keys.key_b[i].data); |
| 125 | + FURI_BIT_SET(keys.key_b_mask, i); |
| 126 | + } |
| 127 | + |
| 128 | + MfClassicError error_value_block = mf_classic_poller_sync_read(nfc, &keys, data); |
| 129 | + |
| 130 | + if(error_value_block == MfClassicErrorNone) { |
| 131 | + nfc_device_set_data(device, NfcProtocolMfClassic, data); |
| 132 | + is_read = true; |
| 133 | + break; |
| 134 | + } |
| 135 | + FURI_LOG_E(TAG, "Failed to read data. Bad keys?"); |
| 136 | + } while(false); |
| 137 | + |
| 138 | + mf_classic_free(data); |
| 139 | + |
| 140 | + return is_read; |
| 141 | +} |
| 142 | + |
| 143 | +static bool banapass_parse(const NfcDevice* device, FuriString* parsed_data) { |
| 144 | + furi_assert(device); |
| 145 | + |
| 146 | + const MfClassicData* data = nfc_device_get_data(device, NfcProtocolMfClassic); |
| 147 | + |
| 148 | + bool parsed = false; |
| 149 | + |
| 150 | + do { |
| 151 | + // verify key |
| 152 | + MfClassicSectorTrailer* sec_tr = mf_classic_get_sector_trailer_by_sector(data, 0); |
| 153 | + uint64_t key_a = bit_lib_bytes_to_num_be(sec_tr->key_a.data, 6); |
| 154 | + uint64_t key_b = bit_lib_bytes_to_num_be(sec_tr->key_b.data, 6); |
| 155 | + if(key_a != banapass_keys_if_value_block[0].a) break; |
| 156 | + |
| 157 | + furi_string_set_str(parsed_data, "\e#Banapass\n"); |
| 158 | + furi_string_cat_str( |
| 159 | + parsed_data, "::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::"); |
| 160 | + furi_string_cat_str(parsed_data, "\nBandai Namco Passport\n"); |
| 161 | + |
| 162 | + // banapass Magic is stored at block 1, byte 2-7 |
| 163 | + uint8_t magic_bytes[6]; |
| 164 | + for(int i = 0; i < 6; i++) { |
| 165 | + magic_bytes[i] = data->block[1].data[2 + i]; |
| 166 | + } |
| 167 | + |
| 168 | + // verify banapass magic |
| 169 | + if(magic_bytes[0] != 'N' || magic_bytes[1] != 'B' || magic_bytes[2] != 'G' || |
| 170 | + magic_bytes[3] != 'I' || magic_bytes[4] != 'C') |
| 171 | + break; |
| 172 | + |
| 173 | + // banapass checksum is stored at block 1, starts from byte 8-15 |
| 174 | + uint8_t check_sum[8]; |
| 175 | + for(int i = 0; i < 8; i++) { |
| 176 | + check_sum[i] = data->block[1].data[8 + i]; |
| 177 | + } |
| 178 | + |
| 179 | + furi_string_cat_str( |
| 180 | + parsed_data, "::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::"); |
| 181 | + |
| 182 | + bool is_block_2_null = true; |
| 183 | + for(int i = 0; i < 16; i++) { |
| 184 | + if(data->block[2].data[i] != 0) { |
| 185 | + is_block_2_null = false; |
| 186 | + break; |
| 187 | + } |
| 188 | + } |
| 189 | + if(is_block_2_null) { |
| 190 | + furi_string_cat_str( |
| 191 | + parsed_data, |
| 192 | + "\nPlease scan the clone at the\nnearest CHUNITHM or\nmaimai Cabinet for the\nAccess Code.\n"); |
| 193 | + furi_string_cat_str( |
| 194 | + parsed_data, "::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::"); |
| 195 | + } else { |
| 196 | + switch(key_b) { |
| 197 | + case banapass_key_b_value_block: |
| 198 | + int32_t value = 0; |
| 199 | + uint8_t addr = 0; |
| 200 | + bool value_found = mf_classic_block_to_value( |
| 201 | + &data->block[2], &value, &addr); // block 2 is value block |
| 202 | + if(value_found) { |
| 203 | + furi_string_cat_printf(parsed_data, "\nValue: %08lX", value); |
| 204 | + } else { |
| 205 | + furi_string_cat_str(parsed_data, "\nPotential clone:\nInvalid value block."); |
| 206 | + } |
| 207 | + furi_string_cat_str( |
| 208 | + parsed_data, |
| 209 | + "\nPlease check the back of\nyour Bandai Namco Passport\nfor the Access Code.\n"); |
| 210 | + furi_string_cat_str( |
| 211 | + parsed_data, "::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::"); |
| 212 | + break; |
| 213 | + |
| 214 | + case banapass_key_b_access_code: |
| 215 | + // banapass access code is stored as decimal hex representation in block 2, starts from byte 6, len 10 bytes |
| 216 | + uint8_t access_code[10]; |
| 217 | + |
| 218 | + furi_string_cat_printf(parsed_data, "\nAccess Code:\n"); |
| 219 | + bool access_code_is_bcd = true; |
| 220 | + |
| 221 | + for(int i = 0; i < 10; i++) { |
| 222 | + access_code[i] = data->block[2].data[6 + i]; |
| 223 | + furi_string_cat_printf(parsed_data, "%02X", access_code[i]); |
| 224 | + if(i % 2 == 1) { |
| 225 | + furi_string_cat_str(parsed_data, " "); |
| 226 | + } |
| 227 | + if((access_code[i] >> 4) > 9) access_code_is_bcd = false; |
| 228 | + if((access_code[i] & 0x0F) > 9) access_code_is_bcd = false; |
| 229 | + } |
| 230 | + furi_string_cat_printf( |
| 231 | + parsed_data, "\nBCD valid: %s\n", access_code_is_bcd ? "Yes" : "No"); |
| 232 | + if((access_code[0] >> 4) != 3) { |
| 233 | + furi_string_cat_printf( |
| 234 | + parsed_data, |
| 235 | + "Potential clone:\nAccess Code preamble\nexpected 3, got %d\n", |
| 236 | + (access_code[0] >> 4)); |
| 237 | + } |
| 238 | + furi_string_cat_str( |
| 239 | + parsed_data, "::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::"); |
| 240 | + |
| 241 | + break; |
| 242 | + default: |
| 243 | + break; |
| 244 | + } |
| 245 | + } |
| 246 | + furi_string_cat_str(parsed_data, "\nMagic:\n"); |
| 247 | + for(int i = 0; i < 6; i++) { |
| 248 | + furi_string_cat_printf(parsed_data, "%c", magic_bytes[i]); |
| 249 | + } |
| 250 | + furi_string_cat_str(parsed_data, "\nChecksum:\n"); |
| 251 | + for(int i = 0; i < 8; i++) { |
| 252 | + furi_string_cat_printf(parsed_data, "%02X ", check_sum[i]); |
| 253 | + } |
| 254 | + |
| 255 | + furi_string_cat_str(parsed_data, "\n"); |
| 256 | + furi_string_cat_str( |
| 257 | + parsed_data, "::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::"); |
| 258 | + |
| 259 | + parsed = true; |
| 260 | + |
| 261 | + } while(false); |
| 262 | + |
| 263 | + return parsed; |
| 264 | +} |
| 265 | + |
| 266 | +/* Actual implementation of app<>plugin interface */ |
| 267 | +static const NfcSupportedCardsPlugin banapass_plugin = { |
| 268 | + .protocol = NfcProtocolMfClassic, |
| 269 | + .verify = banapass_verify, |
| 270 | + .read = banapass_read, |
| 271 | + .parse = banapass_parse, |
| 272 | +}; |
| 273 | + |
| 274 | +/* Plugin descriptor to comply with basic plugin specification */ |
| 275 | +static const FlipperAppPluginDescriptor banapass_plugin_descriptor = { |
| 276 | + .appid = NFC_SUPPORTED_CARD_PLUGIN_APP_ID, |
| 277 | + .ep_api_version = NFC_SUPPORTED_CARD_PLUGIN_API_VERSION, |
| 278 | + .entry_point = &banapass_plugin, |
| 279 | +}; |
| 280 | + |
| 281 | +/* Plugin entry point - must return a pointer to const descriptor */ |
| 282 | +const FlipperAppPluginDescriptor* banapass_plugin_ep(void) { |
| 283 | + return &banapass_plugin_descriptor; |
| 284 | +} |
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