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Use GroupEncoding instead of Curve's from_slice/to_bytes

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Increases usage of standardization while expanding dalek_ff_group.

Closes https://github.com/serai-dex/serai/issues/26 by moving 
dfg::EdwardsPoint to only be for the prime subgroup.
This commit is contained in:
Luke Parker
2022-06-28 01:25:26 -04:00
parent ac17645fc8
commit 3de7a76051
14 changed files with 141 additions and 178 deletions
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30
crypto/frost/src/tests/vectors.rs
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@@ -2,8 +2,10 @@ use std::{sync::Arc, collections::HashMap};
use rand_core::{RngCore, CryptoRng};
use group::{ff::PrimeField, GroupEncoding};
use crate::{
Curve, FrostKeys,
curve::{Curve, F_from_slice, G_from_slice}, FrostKeys,
algorithm::{Schnorr, Hram},
sign::{PreprocessPackage, SignMachine, SignatureMachine, AlgorithmMachine},
tests::{curve::test_curve, schnorr::test_schnorr, recover}
@@ -25,7 +27,7 @@ pub struct Vectors {
// Load these vectors into FrostKeys using a custom serialization it'll deserialize
fn vectors_to_multisig_keys<C: Curve>(vectors: &Vectors) -> HashMap<u16, FrostKeys<C>> {
let shares = vectors.shares.iter().map(
|secret| C::F_from_slice(&hex::decode(secret).unwrap()).unwrap()
|secret| F_from_slice::<C::F>(&hex::decode(secret).unwrap()).unwrap()
).collect::<Vec<_>>();
let verification_shares = shares.iter().map(
|secret| C::GENERATOR * secret
@@ -39,10 +41,10 @@ fn vectors_to_multisig_keys<C: Curve>(vectors: &Vectors) -> HashMap<u16, FrostKe
serialized.extend(vectors.threshold.to_be_bytes());
serialized.extend(u16::try_from(shares.len()).unwrap().to_be_bytes());
serialized.extend(i.to_be_bytes());
serialized.extend(C::F_to_bytes(&shares[usize::from(i) - 1]));
serialized.extend(shares[usize::from(i) - 1].to_repr().as_ref());
serialized.extend(&hex::decode(vectors.group_key).unwrap());
for share in &verification_shares {
serialized.extend(&C::G_to_bytes(share));
serialized.extend(share.to_bytes().as_ref());
}
let these_keys = FrostKeys::<C>::deserialize(&serialized).unwrap();
@@ -50,7 +52,7 @@ fn vectors_to_multisig_keys<C: Curve>(vectors: &Vectors) -> HashMap<u16, FrostKe
assert_eq!(usize::from(these_keys.params().n()), shares.len());
assert_eq!(these_keys.params().i(), i);
assert_eq!(these_keys.secret_share(), shares[usize::from(i - 1)]);
assert_eq!(&hex::encode(&C::G_to_bytes(&these_keys.group_key())), vectors.group_key);
assert_eq!(&hex::encode(these_keys.group_key().to_bytes().as_ref()), vectors.group_key);
keys.insert(i, these_keys);
}
@@ -68,14 +70,14 @@ pub fn test_with_vectors<
// Test against the vectors
let keys = vectors_to_multisig_keys::<C>(&vectors);
let group_key = C::G_from_slice(&hex::decode(vectors.group_key).unwrap()).unwrap();
let group_key = G_from_slice::<C::G>(&hex::decode(vectors.group_key).unwrap()).unwrap();
assert_eq!(
C::GENERATOR * C::F_from_slice(&hex::decode(vectors.group_secret).unwrap()).unwrap(),
C::GENERATOR * F_from_slice::<C::F>(&hex::decode(vectors.group_secret).unwrap()).unwrap(),
group_key
);
assert_eq!(
recover(&keys),
C::F_from_slice(&hex::decode(vectors.group_secret).unwrap()).unwrap()
F_from_slice::<C::F>(&hex::decode(vectors.group_secret).unwrap()).unwrap()
);
let mut machines = vec![];
@@ -94,13 +96,13 @@ pub fn test_with_vectors<
let mut c = 0;
let mut machines = machines.drain(..).map(|(i, machine)| {
let nonces = [
C::F_from_slice(&hex::decode(vectors.nonces[c][0]).unwrap()).unwrap(),
C::F_from_slice(&hex::decode(vectors.nonces[c][1]).unwrap()).unwrap()
F_from_slice::<C::F>(&hex::decode(vectors.nonces[c][0]).unwrap()).unwrap(),
F_from_slice::<C::F>(&hex::decode(vectors.nonces[c][1]).unwrap()).unwrap()
];
c += 1;
let mut serialized = C::G_to_bytes(&(C::GENERATOR * nonces[0]));
serialized.extend(&C::G_to_bytes(&(C::GENERATOR * nonces[1])));
let mut serialized = (C::GENERATOR * nonces[0]).to_bytes().as_ref().to_vec();
serialized.extend((C::GENERATOR * nonces[1]).to_bytes().as_ref());
let (machine, serialized) = machine.unsafe_override_preprocess(
PreprocessPackage { nonces, serialized: serialized.clone() }
@@ -127,8 +129,8 @@ pub fn test_with_vectors<
for (_, machine) in machines.drain() {
let sig = machine.complete(shares.clone()).unwrap();
let mut serialized = C::G_to_bytes(&sig.R);
serialized.extend(C::F_to_bytes(&sig.s));
let mut serialized = sig.R.to_bytes().as_ref().to_vec();
serialized.extend(sig.s.to_repr().as_ref());
assert_eq!(hex::encode(serialized), vectors.sig);
}
}