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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2021 Nokia.
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.oom.certservice.cmpv2client.impl.protections;
import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.operator.DefaultSignatureAlgorithmIdentifierFinder;
import java.security.GeneralSecurityException;
import java.security.PrivateKey;
import java.security.Signature;
/**
* Implementation of signature PKIMessage protection
*/
public class SignatureProtection extends PkiMessageProtection {
private static final AlgorithmIdentifier SHA256_RSA_ALGORITHM = new DefaultSignatureAlgorithmIdentifierFinder()
.find("SHA256withRSA");
private final PrivateKey oldPrivateKey;
public SignatureProtection(PrivateKey privateKey) {
this.oldPrivateKey = privateKey;
}
@Override
public AlgorithmIdentifier getAlgorithmIdentifier() {
return SHA256_RSA_ALGORITHM;
}
@Override
byte[] generateProtectionBytes(byte[] protectedBytes) throws GeneralSecurityException {
Signature signature =
Signature.getInstance(
PKCSObjectIdentifiers.sha256WithRSAEncryption.getId(),
BouncyCastleProvider.PROVIDER_NAME);
signature.initSign(oldPrivateKey);
signature.update(protectedBytes, 0, protectedBytes.length);
return signature.sign();
}
}
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