Struct Key 

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

A key for computing and verifying HMAC-SHA256 tags.

Implementations

impl Key

pub fn from_seed(seed: &[u8; 32]) -> Self

Create a new ring::hmac::Key from a random 32-byte seed.

Use this when deriving a key from a KDF like RootSeed.

pub fn sign_and_append( &self, domain_separator: &[u8; 32], aad: &[&[u8]], data_size_hint: Option<usize>, write_data_cb: &dyn Fn(&mut Vec<u8>), ) -> Vec<u8>

Sign a given plaintext (write_data_cb) and aad, and return plaintext || tag.

pub fn verify<'a>( &self, domain_separator: &[u8; 32], aad: &[&[u8]], signed: &'a [u8], ) -> Result<&'a [u8], &'static str>

Verify a plaintext || tag blob produced by Self::sign_and_append, returning plaintext on success. Constant-time.

Trait Implementations

impl Debug for Key

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

Formats the value using the given formatter.