pub fn hmac_sha256_hex(key: &[u8], data: &[u8]) -> Result<String>Expand description
Computes HMAC-SHA-256 over data and returns lowercase hex.
Products remain responsible for providing a high-entropy, purpose-specific key and managing its lifecycle. This helper is suitable for keyed cache components and lookup digests; it does not replace Argon2id for human passwords.
ยงErrors
Returns an error when the HMAC implementation rejects the supplied key.