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dendrite/cmd/dendrite-demo-yggdrasil/convert/25519_test.go

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// Copyright 2020 The Matrix.org Foundation C.I.C.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package convert
import (
"bytes"
"crypto/ed25519"
"encoding/hex"
"testing"
"golang.org/x/crypto/curve25519"
)
func TestKeyConversion(t *testing.T) {
edPub, edPriv, err := ed25519.GenerateKey(nil)
if err != nil {
t.Fatal(err)
}
t.Log("Signing public:", hex.EncodeToString(edPub))
t.Log("Signing private:", hex.EncodeToString(edPriv))
cuPriv := Ed25519PrivateKeyToCurve25519(edPriv)
t.Log("Encryption private:", hex.EncodeToString(cuPriv))
cuPub := Ed25519PublicKeyToCurve25519(edPub)
t.Log("Converted encryption public:", hex.EncodeToString(cuPub))
var realPub, realPriv [32]byte
copy(realPriv[:32], cuPriv[:32])
curve25519.ScalarBaseMult(&realPub, &realPriv)
t.Log("Scalar-multed encryption public:", hex.EncodeToString(realPub[:]))
if !bytes.Equal(realPriv[:], cuPriv[:]) {
t.Fatal("Private keys should be equal (this means the test is broken)")
}
if !bytes.Equal(realPub[:], cuPub[:]) {
t.Fatal("Public keys should be equal")
}
}