Struct Context

pub struct Context { /* private fields */ }

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

Use sign for single-step HMAC signing.

Implementations

impl Context

pub fn with_key(signing_key: &Key) -> Self

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

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.

pub fn sign(self) -> Tag

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 the return value of sign to a tag. Use verify for verification instead.

Trait Implementations

impl Clone for Context

fn clone(&self) -> Context

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Context

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

Formats the value using the given formatter.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 296 bytes