arnaucube/Nova
1
0
Fork 0
mirror of https://github.com/arnaucube/Nova.git synced 2026-01-12 00:51:28 +01:00
Code Issues Projects Releases Wiki Activity

allow the provider to provide byte representation of a scalar (#140)

Browse Source
This commit is contained in:
Srinath Setty
2023-02-10 12:36:51 -08:00
committed by GitHub
parent 8faffd38ea
commit c4b07f0925
2 changed files with 25 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
src/traits/mod.rs
View File

@@ -224,35 +224,28 @@ pub trait ChallengeTrait<G: Group> {
/// Defines additional methods on PrimeField objects
pub trait PrimeFieldExt: PrimeField {
/// Returns a Scalar representing the bytes
/// Returns a scalar representing the bytes
fn from_uniform(bytes: &[u8]) -> Self;
/// Returns a byte representation
fn to_bytes(v: &[Self]) -> Vec<u8> {
(0..v.len())
.map(|i| v[i].to_repr().as_ref().to_vec())
.collect::<Vec<Vec<u8>>>()
.into_iter()
.flatten()
.collect::<Vec<u8>>()
}
/// Returns a vector of bytes representing the scalar
fn to_bytes(s: &Self) -> Vec<u8>;
}
impl<G: Group<Scalar = F>, F: PrimeField> ChallengeTrait<G> for F {
fn challenge(label: &'static [u8], transcript: &mut G::TE) -> Result<F, NovaError> {
transcript.squeeze_scalar(label)
}
}
impl<G: Group<Scalar = F>, F: PrimeField> AppendToTranscriptTrait<G> for F {
impl<G: Group<Scalar = F>, F: PrimeField + PrimeFieldExt> AppendToTranscriptTrait<G> for F {
fn append_to_transcript(&self, label: &'static [u8], transcript: &mut G::TE) {
transcript.absorb_bytes(label, self.to_repr().as_ref());
transcript.absorb_bytes(label, &<Self as PrimeFieldExt>::to_bytes(self));
}
}
impl<G: Group<Scalar = F>, F: PrimeField + PrimeFieldExt> AppendToTranscriptTrait<G> for [F] {
fn append_to_transcript(&self, label: &'static [u8], transcript: &mut G::TE) {
transcript.absorb_bytes(label, &<F as PrimeFieldExt>::to_bytes(self));
let bytes = (0..self.len())
.map(|i| <F as PrimeFieldExt>::to_bytes(&self[i]))
.collect::<Vec<_>>()
.into_iter()
.flatten()
.collect::<Vec<u8>>();
transcript.absorb_bytes(label, &bytes);
}
}