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Fix https://github.com/serai-dex/serai/issues/150

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This commit is contained in:
Luke Parker
2022-11-10 22:35:09 -05:00
parent d714f2202d
commit 84de427d72
32 changed files with 313 additions and 278 deletions
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18
crypto/schnorr/src/lib.rs
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@@ -1,8 +1,9 @@
use core::ops::Deref;
use std::io::{self, Read, Write};
use rand_core::{RngCore, CryptoRng};
use zeroize::Zeroize;
use zeroize::{Zeroize, Zeroizing};
use group::{
ff::{Field, PrimeField},
@@ -46,11 +47,16 @@ impl<C: Ciphersuite> SchnorrSignature<C> {
}
/// Sign a Schnorr signature with the given nonce for the specified challenge.
pub fn sign(mut private_key: C::F, mut nonce: C::F, challenge: C::F) -> SchnorrSignature<C> {
let res = SchnorrSignature { R: C::generator() * nonce, s: nonce + (private_key * challenge) };
private_key.zeroize();
nonce.zeroize();
res
pub fn sign(
private_key: &Zeroizing<C::F>,
nonce: Zeroizing<C::F>,
challenge: C::F,
) -> SchnorrSignature<C> {
SchnorrSignature {
// Uses deref instead of * as * returns C::F yet deref returns &C::F, preventing a copy
R: C::generator() * nonce.deref(),
s: (challenge * private_key.deref()) + nonce.deref(),
}
}
/// Verify a Schnorr signature for the given key with the specified challenge.