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Inline challenge function

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Thomas Eizinger 2021-05-11 12:13:14 +10:00
parent fb36b7fe4f
commit a4077d13e5
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GPG Key ID: 651AC83A6C6C8B96
1 changed files with 19 additions and 40 deletions
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59
monero-adaptor/src/clsag.rs
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@ -41,17 +41,14 @@ pub fn sign(
let pk_i = ring[i + 1];
let adjusted_commitment_i = commitment_ring[i] - pseudo_output_commitment;
// TODO: Do not unwrap here
challenge(
let L_i = compute_L(h_prev, &mus, *s_i, pk_i, adjusted_commitment_i);
let R_i = compute_R(h_prev, &mus, pk_i, *s_i, I, D_inv_8);
hash_to_scalar(&[
&prefix,
*s_i,
pk_i,
adjusted_commitment_i,
D_inv_8,
h_prev,
I,
&mus,
)
L_i.compress().as_bytes().as_ref(),
R_i.compress().as_bytes().as_ref(),
])
});
let s_last = alpha - h_last * ((mus.mu_P * signing_key) + (mus.mu_C * z));
@ -116,26 +113,6 @@ fn clsag_round_hash_prefix(
prefix
}
fn challenge(
prefix: &[u8],
s_i: Scalar,
pk_i: EdwardsPoint,
adjusted_commitment_i: EdwardsPoint,
D: EdwardsPoint,
h_prev: Scalar,
I: EdwardsPoint,
mus: &AggregationHashes,
) -> Scalar {
let L_i = compute_L(h_prev, mus, s_i, pk_i, adjusted_commitment_i);
let R_i = compute_R(h_prev, mus, pk_i, s_i, I, D);
hash_to_scalar(&[
prefix,
L_i.compress().as_bytes().as_ref(),
R_i.compress().as_bytes().as_ref(),
])
}
// L_i = s_i * G + c_p * pk_i + c_c * (commitment_i - pseudoutcommitment)
fn compute_L(
h_prev: Scalar,
@ -241,18 +218,20 @@ impl Signature {
let mut h = self.h_0;
let mus = todo!();
let adjusted_commitment_i = todo!();
for (i, s_i) in self.responses.iter().enumerate() {
let pk_i = ring[(i + 1) % RING_SIZE];
h = challenge(
&clsag_round_hash_prefix(&ring_concat, todo!(), todo!(), msg),
*s_i,
pk_i,
todo!(),
todo!(),
h,
self.I,
todo!(),
);
let prefix = clsag_round_hash_prefix(&ring_concat, todo!(), todo!(), msg);
let L_i = compute_L(h, mus, *s_i, pk_i, adjusted_commitment_i);
let R_i = compute_R(h, mus, pk_i, *s_i, self.I, self.D);
h = hash_to_scalar(&[
&prefix,
L_i.compress().as_bytes().as_ref(),
R_i.compress().as_bytes().as_ref(),
])
}
Ok(h == self.h_0)