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Consolidate FROST testing code

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This commit is contained in:
Luke Parker 2022-04-28 21:47:25 -04:00
parent 777bb3df34
commit 8821eb0984
No known key found for this signature in database
GPG key ID: F9F1386DB1E119B6
3 changed files with 96 additions and 73 deletions
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77
coins/monero/tests/clsag.rs
View file

@ -5,18 +5,10 @@ use curve25519_dalek::{constants::ED25519_BASEPOINT_TABLE, scalar::Scalar};
use monero_serai::{random_scalar, Commitment, frost::MultisigError, key_image, clsag};
#[cfg(feature = "multisig")]
use ::frost::sign;
#[cfg(feature = "multisig")]
mod frost;
#[cfg(feature = "multisig")]
use crate::frost::generate_keys;
#[cfg(feature = "multisig")]
const THRESHOLD: usize = 5;
#[cfg(feature = "multisig")]
const PARTICIPANTS: usize = 8;
use crate::frost::{THRESHOLD, PARTICIPANTS, generate_keys, sign};
const RING_INDEX: u8 = 3;
const RING_LEN: u64 = 11;
@ -62,7 +54,7 @@ fn test_single() {
#[cfg(feature = "multisig")]
#[test]
fn test_multisig() -> Result<(), MultisigError> {
let (keys, group_private) = generate_keys(THRESHOLD, PARTICIPANTS);
let (keys, group_private) = generate_keys();
let t = keys[0].params().t();
let mut images = vec![];
@ -102,59 +94,26 @@ fn test_multisig() -> Result<(), MultisigError> {
ring.push([&dest * &ED25519_BASEPOINT_TABLE, Commitment::new(mask, amount).calculate()]);
}
let mut machines = vec![];
let mut commitments = Vec::with_capacity(PARTICIPANTS + 1);
commitments.resize(PARTICIPANTS + 1, None);
for i in 1 ..= t {
machines.push(
sign::StateMachine::new(
sign::Params::new(
clsag::Multisig::new(
&mut ChaCha12Rng::seed_from_u64(1),
msg,
clsag::Input::new(image, ring.clone(), RING_INDEX, Commitment::new(randomness, AMOUNT)).unwrap()
).unwrap(),
keys[i - 1].clone(),
&(1 ..= t).collect::<Vec<usize>>()
).unwrap()
)
);
commitments[i] = Some(machines[i - 1].preprocess(&mut OsRng).unwrap());
}
let mut shares = Vec::with_capacity(PARTICIPANTS + 1);
shares.resize(PARTICIPANTS + 1, None);
for i in 1 ..= t {
shares[i] = Some(
machines[i - 1].sign(
&commitments
.iter()
.enumerate()
.map(|(idx, value)| if idx == i { None } else { value.to_owned() })
.collect::<Vec<Option<Vec<u8>>>>(),
&vec![]
let mut algorithms = Vec::with_capacity(t);
for _ in 1 ..= t {
algorithms.push(
clsag::Multisig::new(
&mut ChaCha12Rng::seed_from_u64(1),
msg,
clsag::Input::new(image, ring.clone(), RING_INDEX, Commitment::new(randomness, AMOUNT)).unwrap()
).unwrap()
);
}
let mut signature = None;
for i in 1 ..= t {
// Multisig does call verify to ensure integrity upon complete, before checking individual key
// shares. For FROST Schnorr, it's cheaper. For CLSAG, it may be more expensive? Yet it ensures
// we have usable signatures, not just signatures we think are usable
let sig = machines[i - 1].complete(
&shares
.iter()
.enumerate()
.map(|(idx, value)| if idx == i { None } else { value.to_owned() })
.collect::<Vec<Option<Vec<u8>>>>()
).unwrap();
if signature.is_none() {
signature = Some(sig.clone());
}
// Check the commitment out and the non-decoy s scalar are identical to every other signature
assert_eq!(sig.1, signature.as_ref().unwrap().1);
assert_eq!(sig.0.s[RING_INDEX as usize], signature.as_ref().unwrap().0.s[RING_INDEX as usize]);
let mut signatures = sign(algorithms, keys);
let signature = signatures.swap_remove(0);
for s in 0 .. (t - 1) {
// Verify the commitments and the non-decoy s scalar are identical to every other signature
// FROST will already have called verify on the produced signature, before checking individual
// key shares. For FROST Schnorr, it's cheaper. For CLSAG, it may be more expensive? Yet it
// ensures we have usable signatures, not just signatures we think are usable
assert_eq!(signatures[s].1, signature.1);
assert_eq!(signatures[s].0.s[RING_INDEX as usize], signature.0.s[RING_INDEX as usize]);
}
Ok(())

77
coins/monero/tests/frost.rs
View file

@ -9,19 +9,21 @@ use dalek_ff_group::{ED25519_BASEPOINT_TABLE, Scalar};
use frost::{
MultisigParams, MultisigKeys,
key_gen,
sign::lagrange
key_gen, algorithm::Algorithm, sign::{self, lagrange}
};
use monero_serai::frost::Ed25519;
pub fn generate_keys(t: usize, n: usize) -> (Vec<Rc<MultisigKeys<Ed25519>>>, Scalar) {
pub const THRESHOLD: usize = 5;
pub const PARTICIPANTS: usize = 8;
pub fn generate_keys() -> (Vec<Rc<MultisigKeys<Ed25519>>>, Scalar) {
let mut params = vec![];
let mut machines = vec![];
let mut commitments = vec![vec![]];
for i in 1 ..= n {
for i in 1 ..= PARTICIPANTS {
params.push(
MultisigParams::new(t, n, i).unwrap()
MultisigParams::new(THRESHOLD, PARTICIPANTS, i).unwrap()
);
machines.push(
key_gen::StateMachine::<Ed25519>::new(
@ -33,7 +35,7 @@ pub fn generate_keys(t: usize, n: usize) -> (Vec<Rc<MultisigKeys<Ed25519>>>, Sca
}
let mut secret_shares = vec![];
for i in 1 ..= n {
for i in 1 ..= PARTICIPANTS {
secret_shares.push(
machines[i - 1].generate_secret_shares(
&mut OsRng,
@ -47,7 +49,7 @@ pub fn generate_keys(t: usize, n: usize) -> (Vec<Rc<MultisigKeys<Ed25519>>>, Sca
}
let mut keys = vec![];
for i in 1 ..= n {
for i in 1 ..= PARTICIPANTS {
let mut our_secret_shares = vec![vec![]];
our_secret_shares.extend(
secret_shares.iter().map(|shares| shares[i].clone()).collect::<Vec<Vec<u8>>>()
@ -56,10 +58,67 @@ pub fn generate_keys(t: usize, n: usize) -> (Vec<Rc<MultisigKeys<Ed25519>>>, Sca
}
let mut group_private = Scalar::zero();
for i in 0 .. t {
group_private += keys[i].secret_share() * lagrange::<Scalar>(i + 1, &(1 ..= t).collect::<Vec<usize>>());
for i in 1 ..= THRESHOLD {
group_private += keys[i - 1].secret_share() * lagrange::<Scalar>(
i,
&(1 ..= THRESHOLD).collect::<Vec<usize>>()
);
}
assert_eq!(&ED25519_BASEPOINT_TABLE * group_private, keys[0].group_key());
(keys, group_private)
}
#[allow(dead_code)] // Currently has some false positive
pub fn sign<S, A: Algorithm<Ed25519, Signature = S>>(
algorithms: Vec<A>,
keys: Vec<Rc<MultisigKeys<Ed25519>>>
) -> Vec<S> {
assert!(algorithms.len() >= THRESHOLD);
assert!(keys.len() >= algorithms.len());
let mut machines = vec![];
let mut commitments = Vec::with_capacity(PARTICIPANTS + 1);
commitments.resize(PARTICIPANTS + 1, None);
for i in 1 ..= THRESHOLD {
machines.push(
sign::StateMachine::new(
sign::Params::new(
algorithms[i - 1].clone(),
keys[i - 1].clone(),
&(1 ..= THRESHOLD).collect::<Vec<usize>>()
).unwrap()
)
);
commitments[i] = Some(machines[i - 1].preprocess(&mut OsRng).unwrap());
}
let mut shares = Vec::with_capacity(PARTICIPANTS + 1);
shares.resize(PARTICIPANTS + 1, None);
for i in 1 ..= THRESHOLD {
shares[i] = Some(
machines[i - 1].sign(
&commitments
.iter()
.enumerate()
.map(|(idx, value)| if idx == i { None } else { value.to_owned() })
.collect::<Vec<Option<Vec<u8>>>>(),
&vec![]
).unwrap()
);
}
let mut res = Vec::with_capacity(THRESHOLD);
for i in 1 ..= THRESHOLD {
res.push(
machines[i - 1].complete(
&shares
.iter()
.enumerate()
.map(|(idx, value)| if idx == i { None } else { value.to_owned() })
.collect::<Vec<Option<Vec<u8>>>>()
).unwrap()
);
}
res
}

15
coins/monero/tests/key_image.rs
View file

@ -1,20 +1,25 @@
#![cfg(feature = "multisig")]
use rand::rngs::OsRng;
use rand::{RngCore, rngs::OsRng};
use monero_serai::{frost::MultisigError, key_image};
mod frost;
use crate::frost::generate_keys;
use crate::frost::{THRESHOLD, PARTICIPANTS, generate_keys};
#[test]
fn test() -> Result<(), MultisigError> {
let (keys, group_private) = generate_keys(3, 5);
let (keys, group_private) = generate_keys();
let image = key_image::generate(&group_private);
let mut included = (1 ..= PARTICIPANTS).into_iter().collect::<Vec<usize>>();
while included.len() > THRESHOLD {
included.swap_remove((OsRng.next_u64() as usize) % included.len());
}
included.sort();
let mut packages = vec![];
packages.resize(5 + 1, None);
let included = vec![1, 3, 4];
packages.resize(PARTICIPANTS + 1, None);
for i in &included {
let i = *i;
packages[i] = Some(