Architecture

CoreExtendedNFC keeps CoreNFC at the transport edge. Card protocols, models, crypto helpers, and parsers are pure Swift logic.

Sources/CoreExtendedNFC/
├── Transport/          CoreNFC tag wrappers, NFCSessionManager, CoreNFC error mapping
├── Protocol/           ISO 14443, card ID + refinement, APDU + exchange, ASN.1, NDEF, errors
├── Cards/              Family-specific command, parser, reader, and dump logic
│   ├── MiFareUltralight/, NTAG/, NTAG424/, DESFire/, FeliCa/, ISO15693/, Type4/
│   ├── IndividualNumber/   Japanese My Number card
│   ├── Transit/            Japan IC, Edy, WAON, nanaco, Octopus, Singapore CEPAS, KS X 6924, T-Union
│   └── Passport/           PACE, BAC, Secure Messaging, AA, PA, data-group parsers (CA detection only)
├── Crypto/             AES-CMAC, ISO 9797 MAC, key derivation, padding, hashing, secret redaction
├── Concurrency/        Lock-protected shared state
├── Logger/             NFCLogger, log store, payload redaction
├── Models/             Card identity, dumps, NDEF, MRZ, passport, My Number
├── Resources/          Localized strings
└── Utilities/          Hex, bytes, parity, and small data helpers

The package depends on openssl-spm. OpenSSL is imported only by the passport code (PACEHandler and OpenSSLPACECurve, ActiveAuthenticationVerifier, SODParser and its Passive Authentication extension) for elliptic-curve PACE, Active Authentication signatures, and CMS / certification path validation.