ceremonyclient/nekryptology/pkg/sharing/v1/ed25519_pedersen_test.go
2023-07-05 00:32:28 -05:00

155 lines
4.2 KiB
Go

//
// Copyright Coinbase, Inc. All Rights Reserved.
//
// SPDX-License-Identifier: Apache-2.0
//
package v1
import (
"crypto/sha512"
"math/big"
"testing"
"filippo.io/edwards25519"
"github.com/stretchr/testify/require"
"source.quilibrium.com/quilibrium/monorepo/nekryptology/internal"
core "source.quilibrium.com/quilibrium/monorepo/nekryptology/pkg/core/curves"
)
var (
ed25519BasePoint = &core.EcPoint{Curve: Ed25519(), X: Ed25519().Gx, Y: Ed25519().Gy}
testPointEd25519, _ = core.NewScalarBaseMult(Ed25519(), big.NewInt(2222))
)
func TestEd25519PedersenSplitInvalidArgs(t *testing.T) {
_, err := NewPedersen(0, 0, nil)
require.NotNil(t, err)
_, err = NewPedersen(3, 2, nil)
require.NotNil(t, err)
_, err = NewPedersen(1, 10, nil)
require.NotNil(t, err)
_, err = NewPedersen(2, 3, nil)
require.NotNil(t, err)
scheme, err := NewPedersen(2, 3, ed25519BasePoint)
require.Nil(t, err)
require.NotNil(t, scheme)
_, err = scheme.Split([]byte{})
require.NotNil(t, err)
// test that split doesn't work on secrets bigger than the modulus
_, err = scheme.Split([]byte{0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65, 0x65})
require.NotNil(t, err)
}
func TestEd25519PedersenCombineNoShares(t *testing.T) {
scheme, err := NewPedersen(2, 3, ed25519BasePoint)
require.Nil(t, err)
require.NotNil(t, scheme)
_, err = scheme.Combine()
require.NotNil(t, err)
}
func TestEd25519PedersenCombineDuplicateShare(t *testing.T) {
scheme, err := NewPedersen(2, 3, ed25519BasePoint)
require.Nil(t, err)
require.NotNil(t, scheme)
_, err = scheme.Combine([]*ShamirShare{
{
Identifier: 1,
Value: field.NewElement(big.NewInt(3)),
},
{
Identifier: 1,
Value: field.NewElement(big.NewInt(3)),
},
}...)
require.NotNil(t, err)
}
func TestEd25519PedersenCombineBadIdentifier(t *testing.T) {
scheme, err := NewPedersen(2, 3, ed25519BasePoint)
require.Nil(t, err)
require.NotNil(t, scheme)
shares := []*ShamirShare{
{
Identifier: 0,
Value: field.NewElement(big.NewInt(3)),
},
{
Identifier: 2,
Value: field.NewElement(big.NewInt(3)),
},
}
_, err = scheme.Combine(shares...)
require.NotNil(t, err)
shares[0] = &ShamirShare{
Identifier: 4,
Value: field.NewElement(big.NewInt(3)),
}
_, err = scheme.Combine(shares...)
require.Error(t, err)
}
func TestEd25519PedersenCombineSingle(t *testing.T) {
scheme, err := NewPedersen(2, 3, testPointEd25519)
require.Nil(t, err)
require.NotNil(t, scheme)
hBytes := sha512.Sum512([]byte("test"))
var arr [32]byte
copy(arr[:], hBytes[:])
sc, err := edwards25519.NewScalar().SetBytesWithClamping(arr[:])
require.Nil(t, err)
result, err := scheme.Split(internal.ReverseScalarBytes(sc.Bytes()))
require.Nil(t, err)
require.NotNil(t, result)
for i, s := range result.SecretShares {
ok, err := scheme.Verify(s, result.BlindingShares[i], result.BlindedVerifiers)
require.Nil(t, err)
require.True(t, ok)
}
secret, err := scheme.Combine(result.SecretShares...)
require.Nil(t, err)
require.Equal(t, internal.ReverseScalarBytes(secret), sc.Bytes())
}
func TestEd25519PedersenAllCombinations(t *testing.T) {
scheme, err := NewPedersen(3, 5, testPointEd25519)
require.Nil(t, err)
require.NotNil(t, scheme)
secret := []byte("test")
result, err := scheme.Split(secret)
for i, s := range result.SecretShares {
ok, err := scheme.Verify(s, result.BlindingShares[i], result.BlindedVerifiers)
require.Nil(t, err)
require.True(t, ok)
}
require.Nil(t, err)
require.NotNil(t, result)
// There are 5*4*3 possible combinations
for i := 0; i < 5; i++ {
for j := 0; j < 5; j++ {
if i == j {
continue
}
for k := 0; k < 5; k++ {
if i == k || j == k {
continue
}
rSecret, err := scheme.Combine(result.SecretShares[i], result.SecretShares[j], result.SecretShares[k])
require.Nil(t, err)
require.NotNil(t, rSecret)
require.Equal(t, rSecret, secret)
bSecret, err := scheme.Combine(result.BlindingShares[i], result.BlindingShares[j], result.BlindingShares[k])
require.Nil(t, err)
require.NotNil(t, bSecret)
require.Equal(t, bSecret, result.Blinding.Bytes())
}
}
}
}