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- Sha512: FIPS 180-4 in Monkey C (no native SHA-512), rotations inlined
with precomputed masks; constants derived from the primes, not typed.
- Hmac: RFC 2104 over SHA-1/256/512 (native HMAC only supports SHA-256).
- Kdf: resumable PBKDF2-HMAC-SHA256 job with calibration bounds
(2,000-200,000 iterations) and HKDF-SHA256.
- Aes: CBC with PKCS#7 over the native cipher; AES-256 chosen.
- SealedBox: encrypt-then-MAC records (HKDF-split keys, length-prefixed
aad, constant-time tag check before decryption).
- SelfTest: known-answer tests for every primitive at start-up.
- Bytes (wipe, constant-time equal), Clock (2038-safe widening, trusted
clock), Jobs (bounded steps against the watchdog, timer runner).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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