com.google.crypto.tink.hybrid.internal.NistCurvesHpkeKemPrivateKey Maven / Gradle / Ivy
// Copyright 2022 Google LLC
//
// 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 com.google.crypto.tink.hybrid.internal;
import com.google.crypto.tink.subtle.EllipticCurves;
import com.google.crypto.tink.util.Bytes;
import com.google.errorprone.annotations.Immutable;
import java.security.GeneralSecurityException;
/** Private keys used in Diffie-Hellman-based P256, P384 and P521 HPKE KEM variants. */
@Immutable
final class NistCurvesHpkeKemPrivateKey implements HpkeKemPrivateKey {
private final Bytes privateKey;
private final Bytes publicKey;
static NistCurvesHpkeKemPrivateKey fromBytes(
byte[] privateKey, byte[] publicKey, EllipticCurves.CurveType curveType)
throws GeneralSecurityException {
EllipticCurves.validatePublicKey(
EllipticCurves.getEcPublicKey(
curveType, EllipticCurves.PointFormatType.UNCOMPRESSED, publicKey),
EllipticCurves.getEcPrivateKey(curveType, privateKey));
return new NistCurvesHpkeKemPrivateKey(privateKey, publicKey);
}
private NistCurvesHpkeKemPrivateKey(byte[] privateKey, byte[] publicKey) {
this.privateKey = Bytes.copyFrom(privateKey);
this.publicKey = Bytes.copyFrom(publicKey);
}
@Override
public Bytes getSerializedPrivate() {
return privateKey;
}
@Override
public Bytes getSerializedPublic() {
return publicKey;
}
}