Struct ExternalPersistHelper 

pub struct ExternalPersistHelper { /* private fields */ }

An external persister helper

Implementations

impl ExternalPersistHelper

pub fn new(shared_secret: [u8; 32]) -> Self

Create a new helper

pub fn new_nonce(&mut self, entropy_source: &dyn EntropySource) -> [u8; 32]

Generate and store a new nonce

pub fn client_hmac(&self, kvs: &Mutations) -> [u8; 32]

Generate a client HMAC - this proves the client constructed the data

pub fn server_hmac(&self, kvs: &Mutations) -> [u8; 32]

Generate a server HMAC - this proves the server saw and persisted the data for a put request.

pub fn check_hmac(&self, kvs: &Mutations, received_hmac: Vec<u8>) -> bool

Check the HMAC from the server on a get response - this proves that the server returned the data as requested with no replay, since it covers the nonce we sent to the server.

Trait Implementations

impl Clone for ExternalPersistHelper

fn clone(&self) -> ExternalPersistHelper

Returns a duplicate of the value.

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

Performs copy-assignment from source.