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Remove C::F_len, C::G_len for F_len<C> and G_len<C>

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Relies on the ff/group API, instead of the custom Curve type.

Also removes GENERATOR_TABLE, only used by dalek, as we should provide 
our own API for that over ff/group instead. This slows down the FROST 
tests, under debug, by about 0.2-0.3s. Ed25519 and Ristretto together 
take ~2.15 seconds now.
This commit is contained in:
Luke Parker
2022-06-30 18:46:18 -04:00
parent 4eafbe2a09
commit 133c1222ad
9 changed files with 46 additions and 84 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
crypto/frost/src/tests/mod.rs
View File

@@ -98,7 +98,7 @@ pub fn recover<C: Curve>(keys: &HashMap<u16, FrostKeys<C>>) -> C::F {
C::F::zero(),
|accum, (i, keys)| accum + (keys.secret_share() * lagrange::<C::F>(*i, &included))
);
assert_eq!(C::GENERATOR_TABLE * group_private, first.group_key(), "failed to recover keys");
assert_eq!(C::GENERATOR * group_private, first.group_key(), "failed to recover keys");
group_private
}

10
crypto/frost/src/tests/schnorr.rs
View File

@@ -15,7 +15,7 @@ pub(crate) fn core_sign<R: RngCore + CryptoRng, C: Curve>(rng: &mut R) {
let challenge = C::F::random(rng); // Doesn't bother to craft an HRAM
assert!(
schnorr::verify::<C>(
C::GENERATOR_TABLE * private_key,
C::GENERATOR * private_key,
challenge,
&schnorr::sign(private_key, nonce, challenge)
)
@@ -28,9 +28,9 @@ pub(crate) fn core_sign<R: RngCore + CryptoRng, C: Curve>(rng: &mut R) {
pub(crate) fn core_verify<R: RngCore + CryptoRng, C: Curve>(rng: &mut R) {
assert!(
!schnorr::verify::<C>(
C::GENERATOR_TABLE * C::F::random(&mut *rng),
C::GENERATOR * C::F::random(&mut *rng),
C::F::random(rng),
&SchnorrSignature { R: C::GENERATOR_TABLE * C::F::zero(), s: C::F::zero() }
&SchnorrSignature { R: C::GENERATOR * C::F::zero(), s: C::F::zero() }
)
);
}
@@ -48,7 +48,7 @@ pub(crate) fn core_batch_verify<R: RngCore + CryptoRng, C: Curve>(rng: &mut R) {
// Batch verify
let triplets = (0 .. 5).map(
|i| (u16::try_from(i + 1).unwrap(), C::GENERATOR_TABLE * keys[i], challenges[i], sigs[i])
|i| (u16::try_from(i + 1).unwrap(), C::GENERATOR * keys[i], challenges[i], sigs[i])
).collect::<Vec<_>>();
schnorr::batch_verify(rng, &triplets).unwrap();
@@ -113,7 +113,7 @@ fn sign_with_offset<R: RngCore + CryptoRng, C: Curve>(rng: &mut R) {
for i in 1 ..= u16::try_from(keys.len()).unwrap() {
keys.insert(i, Arc::new(keys[&i].offset(offset)));
}
let offset_key = group_key + (C::GENERATOR_TABLE * offset);
let offset_key = group_key + (C::GENERATOR * offset);
sign_core(rng, offset_key, &keys);
}