Struct HmacSha256 

pub struct HmacSha256 { /* private fields */ }

HMAC-SHA-256.

Keys of any length are accepted. Served by the driver registered for it; see driver.

Example

let tag = HmacSha256::mac(b"my key", b"hello world");

// Verification, in constant time:
let mut mac = HmacSha256::new(b"my key");
mac.update(b"hello world");
mac.verify(&tag).unwrap();

Implementations

impl HmacSha256

pub const OUTPUT_SIZE: usize = 32

Size of the tag, in bytes.

pub fn new(key: &[u8]) -> Self

Start a new MAC computation with key.

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

Absorb data.

pub fn finalize(self) -> [u8; 32]

Finish the computation and return the tag.

pub fn verify(self, tag: &[u8]) -> Result<(), Error>

Finish the computation and compare the tag with tag in constant time.

A truncated tag (shorter than the full tag) is compared against the corresponding prefix; an empty one never verifies.

pub fn mac(key: &[u8], data: &[u8]) -> [u8; 32]

Compute the tag of data under key in one call.

Trait Implementations

impl Clone for HmacSha256

fn clone(&self) -> HmacSha256

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HmacSha256

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

Formats the value using the given formatter.