Struct Context 

pub struct Context {
    key: Key,
}

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

Use sign for single-step CMAC signing.

Fields

key: Key

Implementations

impl Context

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

Constructs a new CMAC signing context using the given key.

pub fn update(&mut self, data: &[u8]) -> Result<(), Unspecified>

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

Errors

error::Unspecified if the CMAC cannot be updated.

pub fn sign(self) -> Result<Tag, Unspecified>

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

It is generally not safe to implement CMAC verification by comparing the return value of sign to a tag. Use verify for verification instead.

Errors

error::Unspecified if the CMAC calculation cannot be finalized.

Panics

Panics if the CMAC tag length exceeds the maximum allowed length, indicating memory corruption.

Trait Implementations

impl Clone for Context

fn clone(&self) -> Self

Returns a duplicate 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.

impl Send for Context