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This commit is contained in:
Prad Nukala
committed by
Prad Nukala (aider)
Prad Nukala (aider)
parent
5fd43dfd6b
commit
2f976209db
@@ -1,420 +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 dklsv1
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import (
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"encoding/json"
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"fmt"
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"math/big"
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"os"
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"testing"
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"github.com/stretchr/testify/require"
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"golang.org/x/crypto/sha3"
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"github.com/onsonr/hway/crypto/core/curves"
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"github.com/onsonr/hway/crypto/core/protocol"
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"github.com/onsonr/hway/crypto/ot/extension/kos"
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"github.com/onsonr/hway/crypto/tecdsa/dklsv1/dkg"
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)
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// For DKG bob starts first. For refresh and sign, Alice starts first.
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func runIteratedProtocol(firstParty protocol.Iterator, secondParty protocol.Iterator) (error, error) {
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var (
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message *protocol.Message
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aErr error
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bErr error
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)
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for aErr != protocol.ErrProtocolFinished || bErr != protocol.ErrProtocolFinished {
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// Crank each protocol forward one iteration
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message, bErr = firstParty.Next(message)
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if bErr != nil && bErr != protocol.ErrProtocolFinished {
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return nil, bErr
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}
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message, aErr = secondParty.Next(message)
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if aErr != nil && aErr != protocol.ErrProtocolFinished {
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return aErr, nil
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}
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}
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return aErr, bErr
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}
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// Running steps in sequence ensures that no hidden read/write dependency exist in the read/write interfaces.
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func TestDkgProto(t *testing.T) {
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curveInstances := []*curves.Curve{
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curves.K256(),
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curves.P256(),
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}
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for _, curve := range curveInstances {
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alice := NewAliceDkg(curve, protocol.Version1)
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bob := NewBobDkg(curve, protocol.Version1)
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aErr, bErr := runIteratedProtocol(bob, alice)
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t.Run("both alice/bob complete simultaneously", func(t *testing.T) {
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require.ErrorIs(t, aErr, protocol.ErrProtocolFinished)
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require.ErrorIs(t, bErr, protocol.ErrProtocolFinished)
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})
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for i := 0; i < kos.Kappa; i++ {
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if alice.Alice.Output().SeedOtResult.OneTimePadDecryptionKey[i] != bob.Bob.Output().SeedOtResult.OneTimePadEncryptionKeys[i][alice.Alice.Output().SeedOtResult.RandomChoiceBits[i]] {
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t.Errorf("oblivious transfer is incorrect at index i=%v", i)
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}
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}
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t.Run("Both parties produces identical composite pubkey", func(t *testing.T) {
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require.True(t, alice.Alice.Output().PublicKey.Equal(bob.Bob.Output().PublicKey))
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})
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var aliceResult *dkg.AliceOutput
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var bobResult *dkg.BobOutput
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t.Run("alice produces valid result", func(t *testing.T) {
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// Get the result
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r, err := alice.Result(protocol.Version1)
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// Test
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require.NoError(t, err)
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require.NotNil(t, r)
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aliceResult, err = DecodeAliceDkgResult(r)
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require.NoError(t, err)
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})
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t.Run("bob produces valid result", func(t *testing.T) {
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// Get the result
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r, err := bob.Result(protocol.Version1)
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// Test
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require.NoError(t, err)
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require.NotNil(t, r)
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bobResult, err = DecodeBobDkgResult(r)
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require.NoError(t, err)
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})
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t.Run("alice/bob agree on pubkey", func(t *testing.T) {
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require.Equal(t, aliceResult.PublicKey, bobResult.PublicKey)
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})
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}
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}
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// DKG > Refresh > Sign
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func TestRefreshProto(t *testing.T) {
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t.Parallel()
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curveInstances := []*curves.Curve{
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curves.K256(),
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curves.P256(),
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}
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for _, curve := range curveInstances {
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boundCurve := curve
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t.Run(fmt.Sprintf("testing refresh for curve %s", boundCurve.Name), func(tt *testing.T) {
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tt.Parallel()
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// DKG
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aliceDkg := NewAliceDkg(boundCurve, protocol.Version1)
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bobDkg := NewBobDkg(boundCurve, protocol.Version1)
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aDkgErr, bDkgErr := runIteratedProtocol(bobDkg, aliceDkg)
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require.ErrorIs(tt, aDkgErr, protocol.ErrProtocolFinished)
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require.ErrorIs(tt, bDkgErr, protocol.ErrProtocolFinished)
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aliceDkgResultMessage, err := aliceDkg.Result(protocol.Version1)
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require.NoError(tt, err)
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bobDkgResultMessage, err := bobDkg.Result(protocol.Version1)
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require.NoError(tt, err)
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// Refresh
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aliceRefreshResultMessage, bobRefreshResultMessage := refreshV1(t, boundCurve, aliceDkgResultMessage, bobDkgResultMessage)
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// sign
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signV1(t, boundCurve, aliceRefreshResultMessage, bobRefreshResultMessage)
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})
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}
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}
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// DKG > Output > NewDklsSign > Sign > Output
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func TestDkgSignProto(t *testing.T) {
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// Setup
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curve := curves.K256()
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aliceDkg := NewAliceDkg(curve, protocol.Version1)
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bobDkg := NewBobDkg(curve, protocol.Version1)
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// DKG
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aErr, bErr := runIteratedProtocol(bobDkg, aliceDkg)
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require.ErrorIs(t, aErr, protocol.ErrProtocolFinished)
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require.ErrorIs(t, bErr, protocol.ErrProtocolFinished)
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// Output
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aliceDkgResultMessage, err := aliceDkg.Result(protocol.Version1)
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require.NoError(t, err)
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bobDkgResultMessage, err := bobDkg.Result(protocol.Version1)
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require.NoError(t, err)
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// New DklsSign
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msg := []byte("As soon as you trust yourself, you will know how to live.")
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aliceSign, err := NewAliceSign(curve, sha3.New256(), msg, aliceDkgResultMessage, protocol.Version1)
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require.NoError(t, err)
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bobSign, err := NewBobSign(curve, sha3.New256(), msg, bobDkgResultMessage, protocol.Version1)
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require.NoError(t, err)
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// Sign
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t.Run("sign", func(t *testing.T) {
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aErr, bErr = runIteratedProtocol(aliceSign, bobSign)
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require.ErrorIs(t, aErr, protocol.ErrProtocolFinished)
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require.ErrorIs(t, bErr, protocol.ErrProtocolFinished)
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})
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// Don't continue to verifying results if sign didn't run to completion.
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require.ErrorIs(t, aErr, protocol.ErrProtocolFinished)
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require.ErrorIs(t, bErr, protocol.ErrProtocolFinished)
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// Output
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var result *curves.EcdsaSignature
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t.Run("bob produces result of correct type", func(t *testing.T) {
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resultMessage, err := bobSign.Result(protocol.Version1)
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require.NoError(t, err)
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result, err = DecodeSignature(resultMessage)
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require.NoError(t, err)
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})
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require.NotNil(t, result)
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t.Run("valid signature", func(t *testing.T) {
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hash := sha3.New256()
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_, err = hash.Write(msg)
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require.NoError(t, err)
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digest := hash.Sum(nil)
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unCompressedAffinePublicKey := aliceDkg.Output().PublicKey.ToAffineUncompressed()
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require.Equal(t, 65, len(unCompressedAffinePublicKey))
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x := new(big.Int).SetBytes(unCompressedAffinePublicKey[1:33])
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y := new(big.Int).SetBytes(unCompressedAffinePublicKey[33:])
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ecCurve, err := curve.ToEllipticCurve()
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require.NoError(t, err)
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publicKey := &curves.EcPoint{
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Curve: ecCurve,
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X: x,
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Y: y,
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}
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require.True(t,
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curves.VerifyEcdsa(publicKey,
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digest[:],
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result,
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),
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"signature failed verification",
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)
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})
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}
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// Decode > NewDklsSign > Sign > Output
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// NOTE: this cold-start test ensures backwards compatibility with durable,
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// encoding DKG state that may exist within production systems like test
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// Breaking changes must consider downstream production impacts.
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func TestSignColdStart(t *testing.T) {
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// Decode alice/bob state from file
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aliceDkg, err := os.ReadFile("testdata/alice-dkls-v1-dkg.bin")
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require.NoError(t, err)
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bobDkg, err := os.ReadFile("testdata/bob-dkls-v1-dkg.bin")
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require.NoError(t, err)
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// The choice of json marshaling is arbitrary, the binary could have been marshaled in other forms as well
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// The purpose here is to obtain an instance of `protocol.Message`
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aliceDkgMessage := &protocol.Message{}
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err = json.Unmarshal(aliceDkg, aliceDkgMessage)
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require.NoError(t, err)
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bobDkgMessage := &protocol.Message{}
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err = json.Unmarshal(bobDkg, bobDkgMessage)
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require.NoError(t, err)
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signV1(t, curves.K256(), aliceDkgMessage, bobDkgMessage)
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}
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func TestEncodeDecode(t *testing.T) {
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curve := curves.K256()
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alice := NewAliceDkg(curve, protocol.Version1)
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bob := NewBobDkg(curve, protocol.Version1)
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_, _ = runIteratedProtocol(bob, alice)
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var aliceBytes []byte
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var bobBytes []byte
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t.Run("Encode Alice/Bob", func(t *testing.T) {
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aliceDkgMessage, err := EncodeAliceDkgOutput(alice.Alice.Output(), protocol.Version1)
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require.NoError(t, err)
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aliceBytes, err = json.Marshal(aliceDkgMessage)
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require.NoError(t, err)
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bobDkgMessage, err := EncodeBobDkgOutput(bob.Bob.Output(), protocol.Version1)
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require.NoError(t, err)
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bobBytes, err = json.Marshal(bobDkgMessage)
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require.NoError(t, err)
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})
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require.NotEmpty(t, aliceBytes)
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require.NotEmpty(t, bobBytes)
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t.Run("Decode Alice", func(t *testing.T) {
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decodedAliceMessage := &protocol.Message{}
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err := json.Unmarshal(aliceBytes, decodedAliceMessage)
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require.NoError(t, err)
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require.NotNil(t, decodedAliceMessage)
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decodedAlice, err := DecodeAliceDkgResult(decodedAliceMessage)
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require.NoError(t, err)
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require.True(t, alice.Output().PublicKey.Equal(decodedAlice.PublicKey))
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require.Equal(t, alice.Output().SecretKeyShare, decodedAlice.SecretKeyShare)
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})
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t.Run("Decode Bob", func(t *testing.T) {
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decodedBobMessage := &protocol.Message{}
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err := json.Unmarshal(bobBytes, decodedBobMessage)
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require.NoError(t, err)
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require.NotNil(t, decodedBobMessage)
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decodedBob, err := DecodeBobDkgResult(decodedBobMessage)
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require.NoError(t, err)
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require.True(t, bob.Output().PublicKey.Equal(decodedBob.PublicKey))
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require.Equal(t, bob.Output().SecretKeyShare, decodedBob.SecretKeyShare)
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})
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}
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func signV1(t *testing.T, curve *curves.Curve, aliceDkgResultMessage *protocol.Message, bobDkgResultMessage *protocol.Message) {
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t.Helper()
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// New DklsSign
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msg := []byte("As soon as you trust yourself, you will know how to live.")
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aliceSign, err := NewAliceSign(curve, sha3.New256(), msg, aliceDkgResultMessage, protocol.Version1)
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require.NoError(t, err)
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bobSign, err := NewBobSign(curve, sha3.New256(), msg, bobDkgResultMessage, protocol.Version1)
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require.NoError(t, err)
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// Sign
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var aErr error
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var bErr error
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t.Run("sign", func(t *testing.T) {
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aErr, bErr = runIteratedProtocol(aliceSign, bobSign)
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require.ErrorIs(t, aErr, protocol.ErrProtocolFinished)
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require.ErrorIs(t, bErr, protocol.ErrProtocolFinished)
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})
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// Don't continue to verifying results if sign didn't run to completion.
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require.ErrorIs(t, aErr, protocol.ErrProtocolFinished)
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require.ErrorIs(t, bErr, protocol.ErrProtocolFinished)
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// Output
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var result *curves.EcdsaSignature
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t.Run("bob produces result of correct type", func(t *testing.T) {
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resultMessage, err := bobSign.Result(protocol.Version1)
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require.NoError(t, err)
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result, err = DecodeSignature(resultMessage)
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require.NoError(t, err)
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})
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require.NotNil(t, result)
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aliceDkg, err := DecodeAliceDkgResult(aliceDkgResultMessage)
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require.NoError(t, err)
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t.Run("valid signature", func(t *testing.T) {
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hash := sha3.New256()
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_, err = hash.Write(msg)
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require.NoError(t, err)
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digest := hash.Sum(nil)
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unCompressedAffinePublicKey := aliceDkg.PublicKey.ToAffineUncompressed()
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require.Equal(t, 65, len(unCompressedAffinePublicKey))
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x := new(big.Int).SetBytes(unCompressedAffinePublicKey[1:33])
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y := new(big.Int).SetBytes(unCompressedAffinePublicKey[33:])
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ecCurve, err := curve.ToEllipticCurve()
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require.NoError(t, err)
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publicKey := &curves.EcPoint{
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Curve: ecCurve,
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X: x,
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Y: y,
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}
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require.True(t,
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curves.VerifyEcdsa(publicKey,
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digest[:],
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result,
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),
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"signature failed verification",
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)
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})
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}
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func refreshV1(t *testing.T, curve *curves.Curve, aliceDkgResultMessage, bobDkgResultMessage *protocol.Message) (aliceRefreshResultMessage, bobRefreshResultMessage *protocol.Message) {
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t.Helper()
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aliceRefresh, err := NewAliceRefresh(curve, aliceDkgResultMessage, protocol.Version1)
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require.NoError(t, err)
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bobRefresh, err := NewBobRefresh(curve, bobDkgResultMessage, protocol.Version1)
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require.NoError(t, err)
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aErr, bErr := runIteratedProtocol(aliceRefresh, bobRefresh)
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require.ErrorIs(t, aErr, protocol.ErrProtocolFinished)
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require.ErrorIs(t, bErr, protocol.ErrProtocolFinished)
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aliceRefreshResultMessage, err = aliceRefresh.Result(protocol.Version1)
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require.NoError(t, err)
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require.NotNil(t, aliceRefreshResultMessage)
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_, err = DecodeAliceRefreshResult(aliceRefreshResultMessage)
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require.NoError(t, err)
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bobRefreshResultMessage, err = bobRefresh.Result(protocol.Version1)
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require.NoError(t, err)
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require.NotNil(t, bobRefreshResultMessage)
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_, err = DecodeBobRefreshResult(bobRefreshResultMessage)
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require.NoError(t, err)
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return aliceRefreshResultMessage, bobRefreshResultMessage
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}
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func BenchmarkDKGProto(b *testing.B) {
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curveInstances := []*curves.Curve{
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curves.K256(),
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curves.P256(),
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}
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for _, curve := range curveInstances {
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alice := NewAliceDkg(curve, protocol.Version1)
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bob := NewBobDkg(curve, protocol.Version1)
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aErr, bErr := runIteratedProtocol(bob, alice)
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b.Run("both alice/bob complete simultaneously", func(t *testing.B) {
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require.ErrorIs(t, aErr, protocol.ErrProtocolFinished)
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require.ErrorIs(t, bErr, protocol.ErrProtocolFinished)
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})
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for i := 0; i < kos.Kappa; i++ {
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if alice.Alice.Output().SeedOtResult.OneTimePadDecryptionKey[i] != bob.Bob.Output().SeedOtResult.OneTimePadEncryptionKeys[i][alice.Alice.Output().SeedOtResult.RandomChoiceBits[i]] {
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b.Errorf("oblivious transfer is incorrect at index i=%v", i)
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}
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}
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b.Run("Both parties produces identical composite pubkey", func(t *testing.B) {
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require.True(t, alice.Alice.Output().PublicKey.Equal(bob.Bob.Output().PublicKey))
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})
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var aliceResult *dkg.AliceOutput
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var bobResult *dkg.BobOutput
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b.Run("alice produces valid result", func(t *testing.B) {
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// Get the result
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r, err := alice.Result(protocol.Version1)
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// Test
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require.NoError(t, err)
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require.NotNil(t, r)
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aliceResult, err = DecodeAliceDkgResult(r)
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require.NoError(t, err)
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})
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b.Run("bob produces valid result", func(t *testing.B) {
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// Get the result
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r, err := bob.Result(protocol.Version1)
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// Test
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require.NoError(t, err)
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require.NotNil(t, r)
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bobResult, err = DecodeBobDkgResult(r)
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require.NoError(t, err)
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})
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b.Run("alice/bob agree on pubkey", func(t *testing.B) {
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require.Equal(t, aliceResult.PublicKey, bobResult.PublicKey)
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})
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}
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}
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