Trait flexible_transcript::Transcript

pub trait Transcript {
    type Challenge: Clone + Send + Sync + AsRef<[u8]>;

    fn new(name: &'static [u8]) -> Self;
    fn domain_separate(&mut self, label: &'static [u8]);
    fn append_message(&mut self, label: &'static [u8], message: &[u8]);
    fn challenge(&mut self, label: &'static [u8]) -> Self::Challenge;
    fn rng_seed(&mut self, label: &'static [u8]) -> [u8; 32];
}

Required Associated Types

type Challenge: Clone + Send + Sync + AsRef<[u8]>

Required Methods

fn new(name: &'static [u8]) -> Self

Create a new transcript with the specified name

fn domain_separate(&mut self, label: &'static [u8])

Apply a domain separator to the transcript

fn append_message(&mut self, label: &'static [u8], message: &[u8])

Append a message to the transcript

fn challenge(&mut self, label: &'static [u8]) -> Self::Challenge

Produce a challenge. This MUST update the transcript as it does so, preventing the same challenge from being generated multiple times

fn rng_seed(&mut self, label: &'static [u8]) -> [u8; 32]

Produce a RNG seed. Helper function for parties needing to generate random data from an agreed upon state. Internally calls the challenge function for the needed bytes, converting them to the seed format rand_core expects

Implementors

impl<D: SecureDigest> Transcript for DigestTranscript<D>

type Challenge = GenericArray<u8, <D as OutputSizeUser>::OutputSize>