Struct HashStream

pub struct HashStream(/* private fields */);

This structure provides a possibility to calculate a hash digest for a stream of data. Unlike the Hash structure, the given structure lets the code process several data chunks without the need to copy them into a single buffer.

Examples

The example below indicates the data the code is working with; runs the system hash update as many times as required to process all the data chunks and calculates the resulting hash of the system.

use exonum_crypto::HashStream;

let data: Vec<[u8; 5]> = vec![[1, 2, 3, 4, 5], [6, 7, 8, 9, 10]];
let mut hash_stream = HashStream::new();
for chunk in data {
    hash_stream = hash_stream.update(&chunk);
}
let _ = hash_stream.hash();

Implementations

impl HashStream

pub fn new() -> Self

Creates a new instance of HashStream.

pub fn update(self, chunk: &[u8]) -> Self

Processes a chunk of stream and returns a HashStream with the updated internal state.

pub fn hash(self) -> Hash

Returns the resulting hash of the system calculated upon the commit of currently supplied data.

Trait Implementations

impl Debug for HashStream

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

Formats the value using the given formatter.

impl Default for HashStream

fn default() -> HashStream

Returns the “default value” for a type.