ceremonyclient/nekryptology/pkg/dkg/frost/dkg_rounds_test.go

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2023-07-05 05:32:28 +00:00
//
// Copyright Coinbase, Inc. All Rights Reserved.
//
// SPDX-License-Identifier: Apache-2.0
//
package frost
import (
"testing"
"github.com/stretchr/testify/require"
"source.quilibrium.com/quilibrium/monorepo/nekryptology/pkg/core/curves"
"source.quilibrium.com/quilibrium/monorepo/nekryptology/pkg/sharing"
)
var (
testCurve = curves.ED25519()
Ctx = "string to prevent replay attack"
)
// Test dkg round1 works for 2 participants
func TestDkgRound1Works(t *testing.T) {
p1, err := NewDkgParticipant(1, 2, Ctx, testCurve, 2)
require.NoError(t, err)
bcast, p2psend, err := p1.Round1(nil)
require.NoError(t, err)
require.NotNil(t, bcast)
require.NotNil(t, p2psend)
require.NotNil(t, p1.ctx)
require.Equal(t, len(p2psend), 1)
require.Equal(t, p1.round, 2)
_, ok := p2psend[2]
require.True(t, ok)
}
func TestDkgRound1RepeatCall(t *testing.T) {
p1, err := NewDkgParticipant(1, 2, Ctx, testCurve, 2)
require.NoError(t, err)
_, _, err = p1.Round1(nil)
require.NoError(t, err)
_, _, err = p1.Round1(nil)
require.Error(t, err)
}
func TestDkgRound1BadSecret(t *testing.T) {
p1, err := NewDkgParticipant(1, 2, Ctx, testCurve, 2)
require.NoError(t, err)
// secret == 0
secret := []byte{0}
_, _, err = p1.Round1(secret)
require.Error(t, err)
// secret too big
secret = []byte{7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7}
_, _, err = p1.Round1(secret)
require.Error(t, err)
}
func PrepareRound2Input(t *testing.T) (*DkgParticipant, *DkgParticipant, *Round1Bcast, *Round1Bcast, Round1P2PSend, Round1P2PSend) {
// Prepare round 1 output of 2 participants
p1, err := NewDkgParticipant(1, 2, Ctx, testCurve, 2)
require.NoError(t, err)
require.Equal(t, p1.otherParticipantShares[2].Id, uint32(2))
p2, err := NewDkgParticipant(2, 2, Ctx, testCurve, 1)
require.NoError(t, err)
require.Equal(t, p2.otherParticipantShares[1].Id, uint32(1))
bcast1, p2psend1, _ := p1.Round1(nil)
bcast2, p2psend2, _ := p2.Round1(nil)
return p1, p2, bcast1, bcast2, p2psend1, p2psend2
}
// Test FROST DKG round 2 works
func TestDkgRound2Works(t *testing.T) {
// Prepare Dkg Round1 output
p1, _, bcast1, bcast2, _, p2psend2 := PrepareRound2Input(t)
// Actual Test
require.NotNil(t, bcast1)
require.NotNil(t, bcast2)
require.NotNil(t, p2psend2[1])
bcast := make(map[uint32]*Round1Bcast)
p2p := make(map[uint32]*sharing.ShamirShare)
bcast[1] = bcast1
bcast[2] = bcast2
p2p[2] = p2psend2[1]
round2Out, err := p1.Round2(bcast, p2p)
require.NoError(t, err)
require.NotNil(t, round2Out)
require.NotNil(t, p1.SkShare)
require.NotNil(t, p1.VkShare)
require.NotNil(t, p1.VerificationKey)
require.NotNil(t, p1.otherParticipantShares)
}
// Test FROST DKG round 2 repeat call
func TestDkgRound2RepeatCall(t *testing.T) {
// Prepare round 1 output
p1, _, bcast1, bcast2, _, p2psend2 := PrepareRound2Input(t)
// Actual Test
require.NotNil(t, bcast1)
require.NotNil(t, bcast2)
require.NotNil(t, p2psend2[1])
bcast := make(map[uint32]*Round1Bcast)
p2p := make(map[uint32]*sharing.ShamirShare)
bcast[1] = bcast1
bcast[2] = bcast2
p2p[2] = p2psend2[1]
_, err := p1.Round2(bcast, p2p)
require.NoError(t, err)
_, err = p1.Round2(bcast, p2p)
require.Error(t, err)
}
// Test FROST Dkg Round 2 Bad Input
func TestDkgRound2BadInput(t *testing.T) {
// Prepare Dkg Round 1 output
p1, _, _, _, _, _ := PrepareRound2Input(t)
bcast := make(map[uint32]*Round1Bcast)
p2p := make(map[uint32]*sharing.ShamirShare)
// Test empty bcast and p2p
_, err := p1.Round2(bcast, p2p)
require.Error(t, err)
// Test nil bcast and p2p
p1, _, _, _, _, _ = PrepareRound2Input(t)
_, err = p1.Round2(nil, nil)
require.Error(t, err)
// Test tampered input bcast and p2p
p1, _, bcast1, bcast2, _, p2psend2 := PrepareRound2Input(t)
bcast = make(map[uint32]*Round1Bcast)
p2p = make(map[uint32]*sharing.ShamirShare)
// Tamper p2psend2 by doubling the value
tmp, _ := testCurve.Scalar.SetBytes(p2psend2[1].Value)
p2psend2[1].Value = tmp.Double().Bytes()
bcast[1] = bcast1
bcast[2] = bcast2
p2p[2] = p2psend2[1]
_, err = p1.Round2(bcast, p2p)
require.Error(t, err)
}
// Test full round works
func TestFullDkgRoundsWorks(t *testing.T) {
// Initiate two participants and running round 1
p1, p2, bcast1, bcast2, p2psend1, p2psend2 := PrepareRound2Input(t)
bcast := make(map[uint32]*Round1Bcast)
p2p1 := make(map[uint32]*sharing.ShamirShare)
p2p2 := make(map[uint32]*sharing.ShamirShare)
bcast[1] = bcast1
bcast[2] = bcast2
p2p1[2] = p2psend2[1]
p2p2[1] = p2psend1[2]
// Running round 2
round2Out1, _ := p1.Round2(bcast, p2p1)
round2Out2, _ := p2.Round2(bcast, p2p2)
require.Equal(t, round2Out1.VerificationKey, round2Out2.VerificationKey)
s, _ := sharing.NewShamir(2, 2, testCurve)
sk, err := s.Combine(&sharing.ShamirShare{Id: p1.Id, Value: p1.SkShare.Bytes()},
&sharing.ShamirShare{Id: p2.Id, Value: p2.SkShare.Bytes()})
require.NoError(t, err)
vk := testCurve.ScalarBaseMult(sk)
require.True(t, vk.Equal(p1.VerificationKey))
}