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// Copyright (C) 2019-2023 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package crypto
import (
"testing"
"github.com/algorand/falcon"
"github.com/algorand/go-algorand/test/partitiontest"
"github.com/stretchr/testify/require"
)
func TestSignAndVerifyFalcon(t *testing.T) {
partitiontest.PartitionTest(t)
a := require.New(t)
var seed FalconSeed
SystemRNG.RandBytes(seed[:])
key, err := GenerateFalconSigner(seed)
a.NoError(err)
msg := []byte("Neque porro quisquam est qui dolorem ipsum quia dolor sit amet")
byteSig, err := key.SignBytes(msg)
a.NoError(err)
verifier := key.GetVerifyingKey()
err = verifier.VerifyBytes(msg, byteSig)
a.NoError(err)
}
func TestSignAndVerifyFalconHashable(t *testing.T) {
partitiontest.PartitionTest(t)
a := require.New(t)
msg := TestingHashable{data: []byte("Neque porro quisquam est qui dolorem ipsum quia dolor sit amet")}
var seed FalconSeed
SystemRNG.RandBytes(seed[:])
key, err := GenerateFalconSigner(seed)
a.NoError(err)
byteSig, err := key.Sign(msg)
a.NoError(err)
verifier := key.GetVerifyingKey()
err = verifier.Verify(msg, byteSig)
a.NoError(err)
}
func TestFalconCanHandleNilSignature(t *testing.T) {
partitiontest.PartitionTest(t)
a := require.New(t)
var seed FalconSeed
SystemRNG.RandBytes(seed[:])
key, err := GenerateFalconSigner(seed)
a.NoError(err)
err = key.GetVerifyingKey().VerifyBytes([]byte("Test"), nil)
a.Error(err)
}
func TestVerificationBytes(t *testing.T) {
partitiontest.PartitionTest(t)
a := require.New(t)
var seed FalconSeed
SystemRNG.RandBytes(seed[:])
key, err := GenerateFalconSigner(seed)
a.NoError(err)
verifyingRawKey := key.GetVerifyingKey().GetFixedLengthHashableRepresentation()
a.Equal(verifyingRawKey, key.PublicKey[:])
}
func TestFalconsFormatConversion(t *testing.T) {
partitiontest.PartitionTest(t)
a := require.New(t)
var seed FalconSeed
SystemRNG.RandBytes(seed[:])
key, err := GenerateFalconSigner(seed)
a.NoError(err)
msg := []byte("Neque porro quisquam est qui dolorem ipsum quia dolor sit amet")
sig, err := key.SignBytes(msg)
a.NoError(err)
falconSig := falcon.CompressedSignature(sig)
ctFormat, err := falconSig.ConvertToCT()
rawFormat, err := sig.GetFixedLengthHashableRepresentation()
a.NoError(err)
a.NotEqual([]byte(sig), rawFormat)
a.Equal(ctFormat[:], rawFormat)
}
func TestFalconSignature_ValidateVersion(t *testing.T) {
partitiontest.PartitionTest(t)
a := require.New(t)
msg := TestingHashable{data: []byte("Neque porro quisquam est qui dolorem ipsum quia dolor sit amet")}
var seed FalconSeed
SystemRNG.RandBytes(seed[:])
key, err := GenerateFalconSigner(seed)
a.NoError(err)
byteSig, err := key.Sign(msg)
a.NoError(err)
a.True(byteSig.IsSaltVersionEqual(falcon.CurrentSaltVersion))
byteSig[1]++
a.False(byteSig.IsSaltVersionEqual(falcon.CurrentSaltVersion))
}
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