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Use a SeedableRng for CLSAG multisig signing

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This commit is contained in:
Luke Parker
2022-04-28 17:12:54 -04:00
parent 20f214c300
commit 7ed1fca270
4 changed files with 30 additions and 26 deletions
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14
coins/monero/src/clsag/mod.rs
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@@ -1,6 +1,5 @@
use rand_core::{RngCore, CryptoRng};
use blake2::{Digest, Blake2b512};
use ff::Field;
use curve25519_dalek::{
constants::ED25519_BASEPOINT_TABLE,
@@ -29,8 +28,8 @@ mod multisig;
pub use multisig::Multisig;
#[allow(non_snake_case)]
pub(crate) fn sign_core(
rand_source: [u8; 64],
pub(crate) fn sign_core<R: RngCore + CryptoRng>(
rng: &mut R,
msg: &[u8; 32],
input: &SignableInput,
mask: Scalar,
@@ -51,8 +50,6 @@ pub(crate) fn sign_core(
let z;
let mut next_rand = rand_source;
next_rand = Blake2b512::digest(&next_rand).as_slice().try_into().unwrap();
{
C_out = Commitment::new(mask, input.commitment.amount).calculate();
@@ -116,8 +113,7 @@ pub(crate) fn sign_core(
let mut s = vec![];
s.resize(n, Scalar::zero());
while i != r {
s[i] = Scalar::from_bytes_mod_order_wide(&next_rand);
next_rand = Blake2b512::digest(&next_rand).as_slice().try_into().unwrap();
s[i] = dalek_ff_group::Scalar::random(&mut *rng).0;
let c_p = mu_P * c;
let c_c = mu_C * c;
@@ -176,7 +172,7 @@ pub fn sign<R: RngCore + CryptoRng>(
let mut rand_source = [0; 64];
rng.fill_bytes(&mut rand_source);
let (mut clsag, c, mu_C, z, mu_P, C_out) = sign_core(
rand_source,
rng,
&msg,
&inputs[i].1,
mask,