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/*
* ============LICENSE_START=======================================================
* Copyright (C) 2021 Nordix Foundation
* ================================================================================
* 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.openecomp.sdc.be.csar.security;
import java.io.IOException;
import java.io.StringWriter;
import java.security.Key;
import java.security.PrivateKey;
import java.security.cert.Certificate;
import java.security.cert.CertificateEncodingException;
import java.security.cert.X509Certificate;
import java.util.Collections;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.cms.ContentInfo;
import org.bouncycastle.cert.jcajce.JcaCertStore;
import org.bouncycastle.cms.CMSProcessableByteArray;
import org.bouncycastle.cms.CMSSignedData;
import org.bouncycastle.cms.CMSSignedDataGenerator;
import org.bouncycastle.cms.CMSTypedData;
import org.bouncycastle.cms.jcajce.JcaSignerInfoGeneratorBuilder;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.openssl.jcajce.JcaPEMWriter;
import org.bouncycastle.operator.ContentSigner;
import org.bouncycastle.operator.jcajce.JcaContentSignerBuilder;
import org.bouncycastle.operator.jcajce.JcaDigestCalculatorProviderBuilder;
import org.openecomp.sdc.be.csar.security.api.CmsContentSigner;
import org.openecomp.sdc.be.csar.security.exception.CmsSignatureException;
import org.springframework.stereotype.Component;
@Component
public class Sha256WithRsaCmsContentSigner implements CmsContentSigner {
@Override
public byte[] signData(final byte[] data, final Certificate signingCertificate, final Key signingKey)
throws CmsSignatureException {
final CMSTypedData cmsData = new CMSProcessableByteArray(data);
final JcaCertStore certStore = createCertificateStore(signingCertificate);
try {
final ContentSigner contentSigner
= new JcaContentSignerBuilder("SHA256withRSA")
.setProvider(BouncyCastleProvider.PROVIDER_NAME).build((PrivateKey) signingKey);
final CMSSignedDataGenerator cmsGenerator = new CMSSignedDataGenerator();
cmsGenerator.addSignerInfoGenerator(
new JcaSignerInfoGeneratorBuilder(
new JcaDigestCalculatorProviderBuilder().setProvider(BouncyCastleProvider.PROVIDER_NAME).build()
).build(contentSigner, (X509Certificate) signingCertificate)
);
cmsGenerator.addCertificates(certStore);
final CMSSignedData cms = cmsGenerator.generate(cmsData, false);
return cms.getEncoded();
} catch (final Exception e) {
throw new CmsSignatureException("Could not sign the given data", e);
}
}
@Override
public String formatToPemSignature(final byte[] signedData) throws CmsSignatureException {
final StringWriter sw = new StringWriter();
try (final JcaPEMWriter jcaPEMWriter = new JcaPEMWriter(sw)) {
final ContentInfo ci = ContentInfo.getInstance(ASN1Primitive.fromByteArray(signedData));
jcaPEMWriter.writeObject(ci);
} catch (final IOException e) {
throw new CmsSignatureException("Could not convert signed data to PEM format", e);
}
return sw.toString();
}
private JcaCertStore createCertificateStore(final Certificate signingCertificate) throws CmsSignatureException {
try {
return new JcaCertStore(Collections.singletonList(signingCertificate));
} catch (final CertificateEncodingException e) {
final String errorMsg = String
.format("Could not create certificate store from certificate '%s'", signingCertificate);
throw new CmsSignatureException(errorMsg, e);
}
}
}
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