vexahub/opaque-vx
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Only store dummy public key (#374)

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This commit is contained in:
daxpedda
2025-05-20 12:49:11 -07:00
committed by GitHub
parent fdf6a1103b
commit 3777ee680a
5 changed files with 3034 additions and 3025 deletions
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src/opaque.rs
+7 -7
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@@ -75,7 +75,7 @@ pub struct ServerSetup<
> {
oprf_seed: OS,
keypair: KeyPair<KeGroup<CS>, SK>,
pub(crate) fake_keypair: KeyPair<KeGroup<CS>>,
pub(crate) dummy_pk: PublicKey<KeGroup<CS>>,
}
/// The state elements the client holds to register itself
@@ -165,7 +165,7 @@ pub type ServerSetupLen<
CS: CipherSuite,
SK: PrivateKeySerialization<KeGroup<CS>>,
OS: OprfSeedSerialization<OprfHash<CS>, SK::Error>,
> = Sum<Sum<OS::Len, SK::Len>, <KeGroup<CS> as Group>::SkLen>;
> = Sum<Sum<OS::Len, SK::Len>, <KeGroup<CS> as Group>::PkLen>;
impl<CS: CipherSuite, SK: Clone, OS: Clone> ServerSetup<CS, SK, OS> {
/// Create [`ServerSetup`] with the given keypair and OPRF seed.
@@ -181,7 +181,7 @@ impl<CS: CipherSuite, SK: Clone, OS: Clone> ServerSetup<CS, SK, OS> {
Self {
oprf_seed,
keypair,
fake_keypair: KeyPair::<KeGroup<CS>>::random(rng),
dummy_pk: KeyPair::<KeGroup<CS>>::random(rng).public().clone(),
}
}
@@ -203,15 +203,15 @@ impl<CS: CipherSuite, SK: Clone, OS: Clone> ServerSetup<CS, SK, OS> {
where
SK: PrivateKeySerialization<KeGroup<CS>>,
OS: OprfSeedSerialization<OprfHash<CS>, SK::Error>,
// ServerSetup: Hash + KeSk + KeSk
// ServerSetup: Hash + KeSk + KePk
OS::Len: Add<SK::Len>,
Sum<OS::Len, SK::Len>: ArrayLength<u8> + Add<<KeGroup<CS> as Group>::SkLen>,
Sum<OS::Len, SK::Len>: ArrayLength<u8> + Add<<KeGroup<CS> as Group>::PkLen>,
ServerSetupLen<CS, SK, OS>: ArrayLength<u8>,
{
self.oprf_seed
.serialize()
.concat(SK::serialize_key_pair(&self.keypair))
.concat(self.fake_keypair.private().serialize())
.concat(self.dummy_pk.serialize())
}
/// Deserialization from bytes
@@ -223,7 +223,7 @@ impl<CS: CipherSuite, SK: Clone, OS: Clone> ServerSetup<CS, SK, OS> {
Ok(Self {
oprf_seed: OS::deserialize_take(&mut input)?,
keypair: SK::deserialize_take_key_pair(&mut input)?,
fake_keypair: PrivateKey::deserialize_take_key_pair(&mut input)
dummy_pk: PublicKey::deserialize_take(&mut input)
.map_err(ProtocolError::into_custom)?,
})
}