Struct Context

pub struct Context { /* private fields */ }

A context for multi-step (Init-Update-Finish) digest calculations.

Examples

use ring::digest;

let one_shot = digest::digest(&digest::SHA384, b"hello, world");

let mut ctx = digest::Context::new(&digest::SHA384);
ctx.update(b"hello");
ctx.update(b", ");
ctx.update(b"world");
let multi_part = ctx.finish();

assert_eq!(&one_shot.as_ref(), &multi_part.as_ref());

Implementations

impl Context

pub fn new(algorithm: &'static Algorithm) -> Self

Constructs a new context.

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

Updates the digest with all the data in data. update may be called zero or more times until finish is called. It must not be called after finish has been called.

pub fn finish(self) -> Digest

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

pub fn algorithm(&self) -> &'static Algorithm

The algorithm that this context is using.

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.