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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,143 @@ | ||
| use alloc::collections::{BTreeMap, BTreeSet}; | ||
| use core::marker::PhantomData; | ||
|
|
||
| use manul::{ | ||
| combinators::misbehave::{Misbehaving, MisbehavingEntryPoint}, | ||
| dev::{run_sync, BinaryFormat, TestSessionParams, TestSigner, TestVerifier}, | ||
| protocol::{ | ||
| BoxedRound, Deserializer, EchoBroadcast, EntryPoint, LocalError, NormalBroadcast, PartyId, ProtocolMessagePart, | ||
| RoundId, Serializer, | ||
| }, | ||
| session::SessionReport, | ||
| signature::Keypair, | ||
| }; | ||
| use rand_core::{CryptoRngCore, OsRng}; | ||
|
|
||
| use super::{ | ||
| key_init::{KeyInit, KeyInitProtocol, Round2EchoBroadcast, Round3, Round3Broadcast}, | ||
| params::{SchemeParams, TestParams}, | ||
| sigma::SchProof, | ||
| }; | ||
| use crate::{ | ||
| curve::Scalar, | ||
| tools::{bitvec::BitVec, Secret}, | ||
| }; | ||
|
|
||
| #[derive(Debug, Clone, Copy, PartialEq, Eq)] | ||
| enum Behavior { | ||
| R2RandomU, | ||
| R3InvalidSchProof, | ||
| } | ||
|
|
||
| struct MaliciousKeyInitOverride<P>(PhantomData<P>); | ||
|
|
||
| impl<P: SchemeParams, Id: PartyId> Misbehaving<Id, Behavior> for MaliciousKeyInitOverride<P> { | ||
| type EntryPoint = KeyInit<P, Id>; | ||
|
|
||
| fn modify_echo_broadcast( | ||
| rng: &mut impl CryptoRngCore, | ||
| round: &BoxedRound<Id, <Self::EntryPoint as EntryPoint<Id>>::Protocol>, | ||
| behavior: &Behavior, | ||
| serializer: &Serializer, | ||
| deserializer: &Deserializer, | ||
| echo_broadcast: EchoBroadcast, | ||
| ) -> Result<EchoBroadcast, LocalError> { | ||
| if round.id() == RoundId::new(2) && behavior == &Behavior::R2RandomU { | ||
| let orig_message = echo_broadcast | ||
| .deserialize::<Round2EchoBroadcast<P>>(deserializer) | ||
| .unwrap(); | ||
| let mut data = orig_message.data; | ||
|
|
||
| // Replace `u` with something other than we committed to when hashing it in Round 1. | ||
| data.u = BitVec::random(rng, data.u.bits().len()); | ||
|
|
||
| let message = Round2EchoBroadcast { data }; | ||
| return EchoBroadcast::new(serializer, message); | ||
| } | ||
|
|
||
| Ok(echo_broadcast) | ||
| } | ||
|
|
||
| fn modify_normal_broadcast( | ||
| rng: &mut impl CryptoRngCore, | ||
| round: &BoxedRound<Id, <Self::EntryPoint as EntryPoint<Id>>::Protocol>, | ||
| behavior: &Behavior, | ||
| serializer: &Serializer, | ||
| _deserializer: &Deserializer, | ||
| normal_broadcast: NormalBroadcast, | ||
| ) -> Result<NormalBroadcast, LocalError> { | ||
| if round.id() == RoundId::new(3) && behavior == &Behavior::R3InvalidSchProof { | ||
| let round3 = round.downcast_ref::<Round3<P, Id>>()?; | ||
| let context = &round3.context; | ||
| let aux = (&context.sid_hash, &context.my_id, &round3.rho); | ||
|
|
||
| // Make a proof for a random secret. This won't pass verification. | ||
| let x = Secret::init_with(|| Scalar::random(rng)); | ||
| let psi = SchProof::new( | ||
| &context.tau, | ||
| &x, | ||
| &context.public_data.cap_a, | ||
| &x.mul_by_generator(), | ||
| &aux, | ||
| ); | ||
|
|
||
| let message = Round3Broadcast { psi }; | ||
| return NormalBroadcast::new(serializer, message); | ||
| } | ||
|
|
||
| Ok(normal_broadcast) | ||
| } | ||
| } | ||
|
|
||
| type MaliciousKeyEP<P, Id> = MisbehavingEntryPoint<Id, Behavior, MaliciousKeyInitOverride<P>>; | ||
|
|
||
| type Protocol = KeyInitProtocol<TestParams, TestVerifier>; | ||
| type SP = TestSessionParams<BinaryFormat>; | ||
|
|
||
| fn run_with_one_malicious_party( | ||
| behavior: Behavior, | ||
| ) -> (Vec<TestVerifier>, BTreeMap<TestVerifier, SessionReport<Protocol, SP>>) { | ||
| let signers = (0..3).map(TestSigner::new).collect::<Vec<_>>(); | ||
| let ids = signers.iter().map(|signer| signer.verifying_key()).collect::<Vec<_>>(); | ||
| let ids_set = BTreeSet::from_iter(ids.clone()); | ||
|
|
||
| let entry_points = signers | ||
| .into_iter() | ||
| .map(|signer| { | ||
| let id = signer.verifying_key(); | ||
| let entry_point = KeyInit::<TestParams, TestVerifier>::new(ids_set.clone()).unwrap(); | ||
| let behavior = if id == ids[0] { Some(behavior) } else { None }; | ||
| let entry_point = MaliciousKeyEP::new(entry_point, behavior); | ||
| (signer, entry_point) | ||
| }) | ||
| .collect(); | ||
|
|
||
| let reports = run_sync::<_, SP>(&mut OsRng, entry_points).unwrap().reports; | ||
| (ids, reports) | ||
| } | ||
|
|
||
| #[test] | ||
| fn r2_hash_mismatch() { | ||
| let (ids, mut reports) = run_with_one_malicious_party(Behavior::R2RandomU); | ||
|
|
||
| let report0 = reports.remove(&ids[0]).unwrap(); | ||
| let report1 = reports.remove(&ids[1]).unwrap(); | ||
| let report2 = reports.remove(&ids[2]).unwrap(); | ||
|
|
||
| assert!(report0.provable_errors.is_empty()); | ||
| assert!(report1.provable_errors[&ids[0]].verify().is_ok()); | ||
| assert!(report2.provable_errors[&ids[0]].verify().is_ok()); | ||
| } | ||
|
|
||
| #[test] | ||
| fn r3_invalid_sch_proof() { | ||
| let (ids, mut reports) = run_with_one_malicious_party(Behavior::R3InvalidSchProof); | ||
|
|
||
| let report0 = reports.remove(&ids[0]).unwrap(); | ||
| let report1 = reports.remove(&ids[1]).unwrap(); | ||
| let report2 = reports.remove(&ids[2]).unwrap(); | ||
|
|
||
| assert!(report0.provable_errors.is_empty()); | ||
| assert!(report1.provable_errors[&ids[0]].verify().is_ok()); | ||
| assert!(report2.provable_errors[&ids[0]].verify().is_ok()); | ||
| } |
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