absolutebi/serai
1
0
Fork 0
mirror of https://github.com/serai-dex/serai.git synced 2025-12-10 05:09:22 +00:00
Code Issues Packages Projects Releases Wiki Activity

Implement hash_to_point in Rust

Browse Source 
Closes https://github.com/serai-dex/serai/issues/32.
This commit is contained in:
Luke Parker
2022-07-10 16:11:55 -04:00
parent 6ce506a79d
commit 953a873338
10 changed files with 108 additions and 38 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
coins/monero/src/ringct/clsag/mod.rs
View File

@@ -12,11 +12,11 @@ use curve25519_dalek::{
};
use crate::{
Commitment,
Commitment, random_scalar, hash_to_scalar,
transaction::RING_LEN,
wallet::decoys::Decoys,
random_scalar, hash_to_scalar, hash_to_point,
serialize::*,
transaction::RING_LEN
ringct::hash_to_point,
serialize::*
};
#[cfg(feature = "multisig")]
@@ -170,7 +170,7 @@ fn core(
let c_c = mu_C * c;
let L = (&s[i] * &ED25519_BASEPOINT_TABLE) + (c_p * P[i]) + (c_c * C[i]);
let PH = hash_to_point(&P[i]);
let PH = hash_to_point(P[i]);
// Shouldn't be an issue as all of the variables in this vartime statement are public
let R = (s[i] * PH) + images_precomp.vartime_multiscalar_mul(&[c_p, c_c]);
@@ -208,7 +208,7 @@ impl Clsag {
let pseudo_out = Commitment::new(mask, input.commitment.amount).calculate();
let z = input.commitment.mask - mask;
let H = hash_to_point(&input.decoys.ring[r][0]);
let H = hash_to_point(input.decoys.ring[r][0]);
let D = H * z;
let mut s = Vec::with_capacity(input.decoys.ring.len());
for _ in 0 .. input.decoys.ring.len() {
@@ -254,7 +254,7 @@ impl Clsag {
mask,
&msg,
&nonce * &ED25519_BASEPOINT_TABLE,
nonce * hash_to_point(&inputs[i].2.decoys.ring[usize::from(inputs[i].2.decoys.i)][0])
nonce * hash_to_point(inputs[i].2.decoys.ring[usize::from(inputs[i].2.decoys.i)][0])
);
clsag.s[usize::from(inputs[i].2.decoys.i)] = nonce - ((p * inputs[i].0) + c);

5
coins/monero/src/ringct/clsag/multisig.rs
View File

@@ -18,9 +18,8 @@ use frost::{curve::Ed25519, FrostError, FrostView, algorithm::Algorithm};
use dalek_ff_group as dfg;
use crate::{
hash_to_point,
frost::{MultisigError, write_dleq, read_dleq},
ringct::clsag::{ClsagInput, Clsag}
ringct::{hash_to_point, clsag::{ClsagInput, Clsag}}
};
impl ClsagInput {
@@ -129,7 +128,7 @@ impl Algorithm<Ed25519> for ClsagMultisig {
view: &FrostView<Ed25519>,
nonces: &[dfg::Scalar; 2]
) -> Vec<u8> {
self.H = hash_to_point(&view.group_key().0);
self.H = hash_to_point(view.group_key().0);
let mut serialized = Vec::with_capacity(ClsagMultisig::serialized_len());
serialized.extend((view.secret_share().0 * self.H).compress().to_bytes());