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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.DERBitString;
import org.bouncycastle.asn1.cmp.PKIBody;
import org.bouncycastle.asn1.cmp.PKIHeader;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.onap.oom.certservice.cmpv2client.exceptions.CmpClientException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.security.GeneralSecurityException;
import static org.onap.oom.certservice.cmpv2client.impl.CmpUtil.generateProtectedBytes;
/**
* Representation of PKIMessage protection. Complies with RFC4210 (Certificate Management Protocol
* (CMP)) and RFC4211 (Certificate Request Message Format (CRMF)) standards.
*/
public abstract class PkiMessageProtection {
private static final Logger LOG = LoggerFactory.getLogger(PkiMessageProtection.class);
/**
* Takes PKIHeader and PKIBody as parameters and generates protection bytes.
*
* @return bytes representing protection wrapped into DERBitString object.
*/
public DERBitString generatePkiMessageProtection(PKIHeader pkiHeader, PKIBody pkiBody) throws CmpClientException {
try {
byte[] protectedBytes = generateProtectedBytes(pkiHeader, pkiBody);
byte[] protectionBytes = generateProtectionBytes(protectedBytes);
return new DERBitString(protectionBytes);
} catch (GeneralSecurityException ex) {
CmpClientException cmpClientException =
new CmpClientException(
"Exception occurred while generating protection for PKIMessage", ex);
LOG.error("Exception occurred while generating the protection for PKIMessage");
throw cmpClientException;
}
}
/**
* Returns Algorithm Identifier for protection of PKIMessage.
*
* @return Algorithm Identifier.
*/
public abstract AlgorithmIdentifier getAlgorithmIdentifier();
/**
* Takes encoded bytes of PKIMessage (PKIHeader and PKIBody) and generates protection bytes.
*
* @return bytes representing protection.
*/
abstract byte[] generateProtectionBytes(byte[] protectedBytes) throws GeneralSecurityException;
}
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