Trait flexible_transcript::Transcript

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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<M: AsRef<[u8]>>(&mut self, label: &'static [u8], message: M);
    fn challenge(&mut self, label: &'static [u8]) -> Self::Challenge;
    fn rng_seed(&mut self, label: &'static [u8]) -> [u8; 32];
}

Required Associated Types

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

Required Methods

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

Create a new transcript with the specified name.

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

Apply a domain separator to the transcript.

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

Append a message to the transcript.

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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.

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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.