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Prad Nukala
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Prad Nukala (aider)
Prad Nukala (aider)
parent
5fd43dfd6b
commit
2f976209db
@@ -1,186 +0,0 @@
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//
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// Copyright Coinbase, Inc. All Rights Reserved.
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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package sharing
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import (
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"bytes"
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crand "crypto/rand"
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"encoding/json"
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"testing"
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"github.com/stretchr/testify/require"
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"github.com/onsonr/hway/crypto/core/curves"
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)
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func TestShamirSplitInvalidArgs(t *testing.T) {
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curve := curves.ED25519()
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_, err := NewShamir(0, 0, curve)
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require.NotNil(t, err)
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_, err = NewShamir(3, 2, curve)
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require.NotNil(t, err)
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_, err = NewShamir(1, 10, curve)
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require.NotNil(t, err)
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scheme, err := NewShamir(2, 3, curve)
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require.Nil(t, err)
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require.NotNil(t, scheme)
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_, err = scheme.Split(curve.NewScalar(), crand.Reader)
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require.NotNil(t, err)
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}
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func TestShamirCombineNoShares(t *testing.T) {
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curve := curves.ED25519()
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scheme, err := NewShamir(2, 3, curve)
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require.Nil(t, err)
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require.NotNil(t, scheme)
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_, err = scheme.Combine()
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require.NotNil(t, err)
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}
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func TestShamirCombineDuplicateShare(t *testing.T) {
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curve := curves.ED25519()
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scheme, err := NewShamir(2, 3, curve)
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require.Nil(t, err)
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require.NotNil(t, scheme)
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_, err = scheme.Combine([]*ShamirShare{
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{
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Id: 1,
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Value: curve.NewScalar().New(3).Bytes(),
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},
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{
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Id: 1,
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Value: curve.NewScalar().New(3).Bytes(),
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},
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}...)
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require.NotNil(t, err)
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}
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func TestShamirCombineBadIdentifier(t *testing.T) {
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curve := curves.ED25519()
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scheme, err := NewShamir(2, 3, curve)
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require.Nil(t, err)
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require.NotNil(t, scheme)
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shares := []*ShamirShare{
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{
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Id: 0,
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Value: curve.NewScalar().New(3).Bytes(),
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},
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{
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Id: 2,
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Value: curve.NewScalar().New(3).Bytes(),
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},
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}
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_, err = scheme.Combine(shares...)
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require.NotNil(t, err)
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shares[0] = &ShamirShare{
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Id: 4,
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Value: curve.NewScalar().New(3).Bytes(),
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}
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_, err = scheme.Combine(shares...)
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require.NotNil(t, err)
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}
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func TestShamirCombineSingle(t *testing.T) {
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curve := curves.ED25519()
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scheme, err := NewShamir(2, 3, curve)
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require.Nil(t, err)
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require.NotNil(t, scheme)
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shares, err := scheme.Split(curve.NewScalar().Hash([]byte("test")), crand.Reader)
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require.Nil(t, err)
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require.NotNil(t, shares)
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secret, err := scheme.Combine(shares...)
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require.Nil(t, err)
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require.Equal(t, secret, curve.NewScalar().Hash([]byte("test")))
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}
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// Test ComputeL function to compute Lagrange coefficients.
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func TestShamirComputeL(t *testing.T) {
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curve := curves.ED25519()
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scheme, err := NewShamir(2, 2, curve)
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require.Nil(t, err)
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require.NotNil(t, scheme)
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secret := curve.Scalar.Hash([]byte("test"))
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shares, err := scheme.Split(secret, crand.Reader)
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require.Nil(t, err)
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require.NotNil(t, shares)
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identities := make([]uint32, 0)
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for _, xi := range shares {
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identities = append(identities, xi.Id)
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}
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lCoeffs, err := scheme.LagrangeCoeffs(identities)
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require.Nil(t, err)
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require.NotNil(t, lCoeffs)
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// Checking we can reconstruct the same secret using Lagrange coefficients.
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result := curve.NewScalar()
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for _, r := range shares {
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rc, _ := curve.Scalar.SetBytes(r.Value)
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result = result.Add(rc.Mul(lCoeffs[r.Id]))
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}
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require.Equal(t, result.Bytes(), secret.Bytes())
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}
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func TestShamirAllCombinations(t *testing.T) {
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curve := curves.ED25519()
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scheme, err := NewShamir(3, 5, curve)
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require.Nil(t, err)
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require.NotNil(t, scheme)
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secret := curve.Scalar.Hash([]byte("test"))
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shares, err := scheme.Split(secret, crand.Reader)
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require.Nil(t, err)
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require.NotNil(t, shares)
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// There are 5*4*3 possible combinations
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for i := 0; i < 5; i++ {
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for j := 0; j < 5; j++ {
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if i == j {
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continue
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}
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for k := 0; k < 5; k++ {
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if i == k || j == k {
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continue
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}
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rSecret, err := scheme.Combine(shares[i], shares[j], shares[k])
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require.Nil(t, err)
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require.NotNil(t, rSecret)
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require.Equal(t, rSecret, secret)
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}
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}
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}
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}
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// Ensures that ShamirShare's un/marshal successfully.
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func TestMarshalJsonRoundTrip(t *testing.T) {
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curve := curves.ED25519()
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shares := []ShamirShare{
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{0, curve.Scalar.New(300).Bytes()},
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{2, curve.Scalar.New(300000).Bytes()},
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{20, curve.Scalar.New(12812798).Bytes()},
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{31, curve.Scalar.New(17).Bytes()},
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{57, curve.Scalar.New(5066680).Bytes()},
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{128, curve.Scalar.New(3005).Bytes()},
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{19, curve.Scalar.New(317).Bytes()},
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{7, curve.Scalar.New(323).Bytes()},
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{222, curve.NewScalar().New(-1).Bytes()},
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}
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// Run all the tests!
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for _, in := range shares {
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input, err := json.Marshal(in)
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require.NoError(t, err)
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require.NotNil(t, input)
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// Unmarshal and test
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out := &ShamirShare{}
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// out.Value = curve.NewScalar()
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err = json.Unmarshal(input, &out)
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require.NoError(t, err)
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require.Equal(t, in.Id, out.Id)
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require.Equal(t, bytes.Compare(in.Value, out.Value), 0)
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}
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}
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