Struct ring::digest::Context

pub struct Context {
    pub algorithm: &'static Algorithm,
    // some fields omitted
}

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

C analog: EVP_MD_CTX.

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());

Fields

algorithm

The context's algorithm.

Methods

impl Context

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

Constructs a new context.

C analogs: EVP_DigestInit, EVP_DigestInit_ex

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.

C analog: EVP_DigestUpdate

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.

C analogs: EVP_DigestFinal, EVP_DigestFinal_ex

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.