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Inline AggregationHashes::hash

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Thomas Eizinger 2021-05-11 12:17:22 +10:00
parent a4077d13e5
commit a73024ccfc
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GPG Key ID: 651AC83A6C6C8B96
1 changed files with 30 additions and 48 deletions
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78
monero-adaptor/src/clsag.rs
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@ -32,7 +32,13 @@ pub fn sign(
); );
let h_0 = hash_to_scalar(&[&prefix, L.compress().as_bytes(), R.compress().as_bytes()]); let h_0 = hash_to_scalar(&[&prefix, L.compress().as_bytes(), R.compress().as_bytes()]);
let mus = AggregationHashes::new(&ring, &commitment_ring, I, pseudo_output_commitment, H_p_pk); let mus = AggregationHashes::new(
&ring,
&commitment_ring,
I.compress(),
pseudo_output_commitment.compress(),
H_p_pk.compress(),
);
let h_last = fake_responses let h_last = fake_responses
.iter() .iter()
@ -153,58 +159,34 @@ impl AggregationHashes {
pub fn new( pub fn new(
ring: &Ring, ring: &Ring,
commitment_ring: &Ring, commitment_ring: &Ring,
I: EdwardsPoint, I: CompressedEdwardsY,
pseudo_output_commitment: EdwardsPoint, pseudo_output_commitment: CompressedEdwardsY,
D: EdwardsPoint, D: CompressedEdwardsY,
) -> Self { ) -> Self {
let I = I.compress(); let ring = ring.as_ref();
let D = D.compress(); let commitment_ring = commitment_ring.as_ref();
let I = I.as_bytes().as_ref();
let D = D.as_bytes().as_ref();
let pseudo_output_commitment = pseudo_output_commitment.as_bytes().as_ref();
let pseudo_output_commitment = pseudo_output_commitment.compress(); let mu_P = hash_to_scalar(&[
let mu_P = Self::hash(
b"CLSAG_agg_0", b"CLSAG_agg_0",
ring.as_ref(),
commitment_ring.as_ref(),
&I,
&D,
&pseudo_output_commitment,
);
let mu_C = Self::hash(
b"CLSAG_agg_1",
ring.as_ref(),
commitment_ring.as_ref(),
&I,
&D,
&pseudo_output_commitment,
);
Self { mu_P, mu_C }
}
// aggregation hashes:
// mu_{P, C} =
// keccak256("CLSAG_agg_{0, 1}" ||
// ring || ring of commitments || I || z * hash_to_point(signing pk) ||
// pseudooutput commitment)
//
// where z = blinding of real commitment - blinding of pseudooutput commitment.
fn hash(
domain_prefix: &[u8],
ring: &[u8],
commitment_ring: &[u8],
I: &CompressedEdwardsY,
z_key_image: &CompressedEdwardsY,
pseudo_output_commitment: &CompressedEdwardsY,
) -> Scalar {
hash_to_scalar(&[
domain_prefix,
ring, ring,
commitment_ring, commitment_ring,
I.as_bytes(), I,
z_key_image.as_bytes(), D,
pseudo_output_commitment.as_bytes(), pseudo_output_commitment,
]) ]);
let mu_C = hash_to_scalar(&[
b"CLSAG_agg_1",
ring,
commitment_ring,
I,
D,
pseudo_output_commitment,
]);
Self { mu_P, mu_C }
} }
} }