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fix: verify with rust-secp256k1

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This commit is contained in:
thesimplekid
2024-04-29 15:36:47 +01:00
parent 545d2c822d
commit b186da2863
1 changed files with 6 additions and 2 deletions
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8
crates/cdk/src/dhke.rs
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@@ -4,7 +4,9 @@ use std::ops::Deref;
use bitcoin::hashes::sha256::Hash as Sha256Hash;
use bitcoin::hashes::Hash;
use bitcoin::secp256k1::{Parity, PublicKey as NormalizedPublicKey, Scalar, XOnlyPublicKey};
use bitcoin::secp256k1::{
Parity, PublicKey as NormalizedPublicKey, Scalar, Secp256k1, XOnlyPublicKey,
};
use crate::error::Error;
use crate::nuts::nut01::{PublicKey, SecretKey};
@@ -142,7 +144,9 @@ pub fn verify_message(
let y: PublicKey = hash_to_curve(msg)?;
// Compute the expected unblinded message
let expected_unblinded_message: PublicKey = y.combine(&a.public_key())?.into();
let expected_unblinded_message: PublicKey = y
.mul_tweak(&Secp256k1::new(), &Scalar::from(*a.deref()))?
.into();
// Compare the unblinded_message with the expected value
if unblinded_message == expected_unblinded_message {