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3.6.9 Add several tests to the FROST library

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Offset signing is now tested. Multi-nonce algorithms are now tested.
Multi-generator nonce algorithms are now tested. More fault cases are now tested
as well.
This commit is contained in:
Luke Parker
2023-03-01 08:02:45 -05:00
parent c6284b85a4
commit 2fd5cd8161
5 changed files with 336 additions and 47 deletions
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39
crypto/frost/src/tests/vectors.rs
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@@ -11,17 +11,15 @@ use rand_chacha::ChaCha20Rng;
use group::{ff::PrimeField, GroupEncoding};
use dkg::tests::key_gen;
use crate::{
curve::Curve,
Participant, ThresholdCore, ThresholdKeys, FrostError,
algorithm::{IetfTranscript, Schnorr, Hram},
Participant, ThresholdCore, ThresholdKeys,
algorithm::{IetfTranscript, Hram, Schnorr},
sign::{
Writable, Nonce, GeneratorCommitments, NonceCommitments, Commitments, Preprocess,
PreprocessMachine, SignMachine, SignatureMachine, AlgorithmMachine,
},
tests::{clone_without, recover_key, algorithm_machines, commit_and_shares, sign},
tests::{clone_without, recover_key, test_ciphersuite},
};
pub struct Vectors {
@@ -147,36 +145,7 @@ pub fn test_with_vectors<R: RngCore + CryptoRng, C: Curve, H: Hram<C>>(
rng: &mut R,
vectors: Vectors,
) {
// Test a basic Schnorr signature
{
let keys = key_gen(&mut *rng);
let machines = algorithm_machines(&mut *rng, Schnorr::<C, H>::new(), &keys);
const MSG: &[u8] = b"Hello, World!";
let sig = sign(&mut *rng, Schnorr::<C, H>::new(), keys.clone(), machines, MSG);
let group_key = keys[&Participant::new(1).unwrap()].group_key();
assert!(sig.verify(group_key, H::hram(&sig.R, &group_key, MSG)));
}
// Test blame on an invalid Schnorr signature share
{
let keys = key_gen(&mut *rng);
let machines = algorithm_machines(&mut *rng, Schnorr::<C, H>::new(), &keys);
const MSG: &[u8] = b"Hello, World!";
let (mut machines, mut shares) = commit_and_shares(&mut *rng, machines, |_, _| {}, MSG);
let faulty = *shares.keys().next().unwrap();
shares.get_mut(&faulty).unwrap().invalidate();
for (i, machine) in machines.drain() {
if i == faulty {
continue;
}
assert_eq!(
machine.complete(clone_without(&shares, &i)).err(),
Some(FrostError::InvalidShare(faulty))
);
}
}
test_ciphersuite::<R, C, H>(rng);
// Test against the vectors
let keys = vectors_to_multisig_keys::<C>(&vectors);