fn blind()

in src/opaque.rs [1308:1336]

• 27 lines of code
• 3 McCabe index (conditional complexity)

fn blind<CS: CipherSuite, R: RngCore + CryptoRng>(
    rng: &mut R,
    password: &[u8],
) -> Result<voprf::NonVerifiableClientBlindResult<CS::OprfGroup>, voprf::Error>
where
    <OprfHash<CS> as OutputSizeUser>::OutputSize:
        IsLess<U256> + IsLessOrEqual<<OprfHash<CS> as BlockSizeUser>::BlockSize>,
    OprfHash<CS>: Hash,
    <OprfHash<CS> as CoreProxy>::Core: ProxyHash,
    <<OprfHash<CS> as CoreProxy>::Core as BlockSizeUser>::BlockSize: IsLess<U256>,
    Le<<<OprfHash<CS> as CoreProxy>::Core as BlockSizeUser>::BlockSize, U256>: NonZero,
{
    #[cfg(not(test))]
    let result = voprf::NonVerifiableClient::blind(password, rng)?;

    #[cfg(test)]
    let result = {
        let mut blind_bytes = GenericArray::<_, <OprfGroup<CS> as Group>::ScalarLen>::default();
        let blind = loop {
            rng.fill_bytes(&mut blind_bytes);
            if let Ok(scalar) = <OprfGroup<CS> as Group>::deserialize_scalar(&blind_bytes) {
                break scalar;
            }
        };
        voprf::NonVerifiableClient::deterministic_blind_unchecked(password, blind)?
    };

    Ok(result)
}