Struct ring::hmac::SigningContext

pub struct SigningContext { /* fields omitted */ }

A context for multi-step (Init-Update-Finish) HMAC signing.

Use sign for single-step HMAC signing.

C analog: HMAC_CTX.

Methods

impl SigningContext

pub fn with_key(signing_key: &SigningKey) -> SigningContext

Constructs a new HMAC signing context using the given digest algorithm and key.

C analog: HMAC_CTX_init

pub fn update(&mut self, data: &[u8])

Updates the HMAC with all the data in data. update may be called zero or more times until finish is called.

C analog: HMAC_Update

pub fn sign(self) -> Signature

Finalizes the HMAC calculation and returns the HMAC value. sign consumes the context so it cannot be (mis-)used after sign has been called.

It is generally not safe to implement HMAC verification by comparing

C analog: HMAC_Final

Trait Implementations

impl Debug for SigningContext

fn fmt(&self, f: &mut Formatter) -> Result<(), Error>

Formats the value using the given formatter.

impl Clone for SigningContext

fn clone(&self) -> SigningContext

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.