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/*
* Copyright 2019
* <p>
* 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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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 org.onap.cvc.csar.security;
import org.bouncycastle.cms.CMSException;
import org.bouncycastle.cms.CMSSignerDigestMismatchException;
import org.bouncycastle.cms.jcajce.JcaSimpleSignerInfoVerifierBuilder;
import org.bouncycastle.operator.OperatorCreationException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.security.cert.X509Certificate;
import java.util.Optional;
public class CmsSignatureValidator {
private static final Logger LOG = LoggerFactory.getLogger(CmsSignatureValidator.class);
public boolean verifySignedData(
final byte[] cmsSignature,
final Optional<byte[]> certificate,
final byte[] fileContent) throws CmsSignatureValidatorException {
try {
CmsSignatureData signatureData = new CmsSignatureDataFactory().createForFirstSigner(cmsSignature, fileContent);
if( signatureData.getCertificate().isEmpty() ) {
signatureData.loadCertificate(certificate.orElseThrow(() -> new CmsSignatureValidatorException("No certificate found in cms signature and ETSI-Entry-Certificate doesn't exist")));
}
return verifySignedData(signatureData);
} catch ( CmsSignatureLoadingException e) {
throw new CmsSignatureValidatorException("Unexpected error occurred during signature validation!", e);
}
}
public boolean verifySignedData(final CmsSignatureData signatureData) throws CmsSignatureValidatorException {
try {
X509Certificate certificate = signatureData.getCertificate().orElseThrow(() -> new CMSException("No certificate found in signature data!"));
return signatureData.getSignerInformation().verify(new JcaSimpleSignerInfoVerifierBuilder().build(certificate));
} catch (CMSSignerDigestMismatchException e){
//message-digest attribute value does not match calculated value
LOG.warn("CMS signer digest mismatch.", e);
return false;
}
catch (OperatorCreationException | CMSException e) {
throw new CmsSignatureValidatorException("Unexpected error occurred during signature validation!", e);
}
}
}
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