Struct HmacSha256Chain 

pub struct HmacSha256Chain { /* private fields */ }

HMAC-SHA256-keyed IntegrityChain.

Implementations

impl HmacSha256Chain

pub fn new(key: impl Into<Vec<u8>>) -> Result<Self, IntegrityError>

Construct from a key. Rejects keys shorter than 32 bytes.

pub fn from_hex(hex_key: &str) -> Result<Self, IntegrityError>

Construct from a hex string (handy for tests / config files).

Trait Implementations

impl IntegrityChain for HmacSha256Chain

fn sign_event( &self, prev_signature: &EventSignature, event: &Event, ) -> Result<EventSignature, IntegrityError>

Compute the signature over prev_signature || canonical_event_bytes.

fn verify_chain(&self, events: &[(Event, EventSignature)]) -> IntegrityResult

Verify a contiguous in-order event stream. Returns Valid if every event’s signature matches the chained recomputation, else Broken with the first failure.