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Fix https://github.com/serai-dex/serai/issues/14.

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This commit is contained in:
Luke Parker
2022-07-12 01:28:01 -04:00
parent cf28967754
commit 5eb61f3a87
11 changed files with 198 additions and 123 deletions
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12
coins/monero/src/wallet/send/multisig.rs
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@@ -112,6 +112,7 @@ impl SignableTransaction {
AlgorithmMachine::new(
ClsagMultisig::new(
transcript.clone(),
input.key,
inputs[i].clone()
).map_err(|e| TransactionError::MultisigError(e))?,
Arc::new(offset),
@@ -159,7 +160,10 @@ impl PreprocessMachine for TransactionMachine {
rng: &mut R
) -> (TransactionSignMachine, Vec<u8>) {
// Iterate over each CLSAG calling preprocess
let mut serialized = Vec::with_capacity(self.clsags.len() * (64 + ClsagMultisig::serialized_len()));
let mut serialized = Vec::with_capacity(
// D_{G, H}, E_{G, H}, DLEqs, key image addendum
self.clsags.len() * ((2 * (32 + 32)) + (2 * (32 + 32)) + ClsagMultisig::serialized_len())
);
let clsags = self.clsags.drain(..).map(|clsag| {
let (clsag, preprocess) = clsag.preprocess(rng);
serialized.extend(&preprocess);
@@ -224,8 +228,8 @@ impl SignMachine<Transaction> for TransactionSignMachine {
}
}
// FROST commitments, image, H commitments, and their proofs
let clsag_len = 64 + ClsagMultisig::serialized_len();
// FROST commitments and their DLEqs, and the image and its DLEq
let clsag_len = (2 * (32 + 32)) + (2 * (32 + 32)) + ClsagMultisig::serialized_len();
for (l, commitments) in &commitments {
if commitments.len() != (self.clsags.len() * clsag_len) {
Err(FrostError::InvalidCommitment(*l))?;
@@ -246,7 +250,7 @@ impl SignMachine<Transaction> for TransactionSignMachine {
for c in 0 .. self.clsags.len() {
for (l, preprocess) in &commitments[c] {
images[c] += CompressedEdwardsY(
preprocess[64 .. 96].try_into().map_err(|_| FrostError::InvalidCommitment(*l))?
preprocess[(clsag_len - 96) .. (clsag_len - 64)].try_into().map_err(|_| FrostError::InvalidCommitment(*l))?
).decompress().ok_or(FrostError::InvalidCommitment(*l))?;
}
}