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Support signing Monero TXs with multiple inputs

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Remove's CLSAG's msg Rc for the msg available through AlgorithmMachine. 
Potentially slightly more inefficient, as it needs to be converted from 
a slice to a [u8; 32], yet removes a re-impl.

Also removes a match for an if.
This commit is contained in:
Luke Parker
2022-05-18 00:53:13 -04:00
parent 3a13f80bdd
commit 7c0886a113
7 changed files with 217 additions and 164 deletions
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14
coins/monero/tests/frost.rs
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@@ -1,7 +1,5 @@
#![cfg(feature = "multisig")]
use std::rc::Rc;
use rand::rngs::OsRng;
use ff::Field;
@@ -17,7 +15,7 @@ use monero_serai::frost::Ed25519;
pub const THRESHOLD: usize = 3;
pub const PARTICIPANTS: usize = 5;
pub fn generate_keys() -> (Vec<Rc<MultisigKeys<Ed25519>>>, Scalar) {
pub fn generate_keys() -> (Vec<MultisigKeys<Ed25519>>, Scalar) {
let mut params = vec![];
let mut machines = vec![];
let mut commitments = vec![vec![]];
@@ -54,7 +52,7 @@ pub fn generate_keys() -> (Vec<Rc<MultisigKeys<Ed25519>>>, Scalar) {
our_secret_shares.extend(
secret_shares.iter().map(|shares| shares[i].clone()).collect::<Vec<Vec<u8>>>()
);
keys.push(Rc::new(machines[i - 1].complete(our_secret_shares).unwrap().clone()));
keys.push(machines[i - 1].complete(our_secret_shares).unwrap().clone());
}
let mut group_private = Scalar::zero();
@@ -70,12 +68,8 @@ pub fn generate_keys() -> (Vec<Rc<MultisigKeys<Ed25519>>>, Scalar) {
}
#[allow(dead_code)] // Currently has some false positive
pub fn sign<S, M: sign::StateMachine<Signature = S>>(
machines: &mut Vec<M>,
keys: Vec<Rc<MultisigKeys<Ed25519>>>
) -> Vec<S> {
pub fn sign<S, M: sign::StateMachine<Signature = S>>(machines: &mut Vec<M>, msg: &[u8]) -> Vec<S> {
assert!(machines.len() >= THRESHOLD);
assert!(keys.len() >= machines.len());
let mut commitments = Vec::with_capacity(PARTICIPANTS + 1);
commitments.resize(PARTICIPANTS + 1, None);
@@ -93,7 +87,7 @@ pub fn sign<S, M: sign::StateMachine<Signature = S>>(
.enumerate()
.map(|(idx, value)| if idx == i { None } else { value.to_owned() })
.collect::<Vec<Option<Vec<u8>>>>(),
&vec![]
msg
).unwrap()
);
}