fn finalize_after_unblind<()

in src/oprf.rs [239:267]

• 24 lines of code
• 1 McCabe index (conditional complexity)

fn finalize_after_unblind<
    'a,
    CS: CipherSuite,
    I: AsRef<[u8]>,
    IE: 'a + Iterator<Item = (I, <CS::Group as Group>::Elem)>,
>(
    inputs_and_unblinded_elements: IE,
    _unused: &'a [u8],
) -> FinalizeAfterUnblindResult<CS, I, IE>
where
    <CS::Hash as OutputSizeUser>::OutputSize:
        IsLess<U256> + IsLessOrEqual<<CS::Hash as BlockSizeUser>::BlockSize>,
{
    inputs_and_unblinded_elements.map(|(input, unblinded_element)| {
        let elem_len = <CS::Group as Group>::ElemLen::U16.to_be_bytes();

        // hashInput = I2OSP(len(input), 2) || input ||
        //             I2OSP(len(unblindedElement), 2) || unblindedElement ||
        //             "Finalize"
        // return Hash(hashInput)
        Ok(CS::Hash::new()
            .chain_update(i2osp_2(input.as_ref().len()).map_err(|_| Error::Input)?)
            .chain_update(input.as_ref())
            .chain_update(elem_len)
            .chain_update(CS::Group::serialize_elem(unblinded_element))
            .chain_update(&STR_FINALIZE)
            .finalize())
    })
}