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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2020 Nordix Foundation.
* ================================================================================
* Modification copyright 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;
import static org.onap.oom.certservice.cmpv2client.impl.CmpResponseHelper.checkIfCmpResponseContainsError;
import static org.onap.oom.certservice.cmpv2client.impl.CmpResponseHelper.getCertFromByteArray;
import static org.onap.oom.certservice.cmpv2client.impl.CmpResponseHelper.verifyAndReturnCertChainAndTrustSTore;
import java.io.IOException;
import java.security.KeyPair;
import java.security.Security;
import java.security.cert.CertificateParsingException;
import java.security.cert.X509Certificate;
import java.util.Collections;
import java.util.Date;
import java.util.Objects;
import java.util.Optional;
import org.apache.http.impl.client.CloseableHttpClient;
import org.bouncycastle.asn1.cmp.CMPCertificate;
import org.bouncycastle.asn1.cmp.CertRepMessage;
import org.bouncycastle.asn1.cmp.CertResponse;
import org.bouncycastle.asn1.cmp.PKIBody;
import org.bouncycastle.asn1.cmp.PKIMessage;
import org.bouncycastle.asn1.x509.Certificate;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.onap.oom.certservice.certification.configuration.model.Cmpv2Server;
import org.onap.oom.certservice.certification.model.CsrModel;
import org.onap.oom.certservice.certification.model.OldCertificateModel;
import org.onap.oom.certservice.cmpv2client.api.CmpClient;
import org.onap.oom.certservice.cmpv2client.exceptions.CmpClientException;
import org.onap.oom.certservice.cmpv2client.model.Cmpv2CertificationModel;
import org.onap.oom.certservice.cmpv2client.validation.CmpCertificationValidator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Implementation of the CmpClient Interface conforming to RFC4210 (Certificate Management Protocol
* (CMP)) and RFC4211 (Certificate Request Message Format (CRMF)) standards.
*/
public class CmpClientImpl implements CmpClient {
private static final Logger LOG = LoggerFactory.getLogger(CmpClientImpl.class);
private final CloseableHttpClient httpClient;
private final CmpCertificationValidator validator;
public CmpClientImpl(CloseableHttpClient httpClient) {
this.httpClient = httpClient;
this.validator = new CmpCertificationValidator();
}
static {
Security.addProvider(new BouncyCastleProvider());
}
@Override
public Cmpv2CertificationModel executeInitializationRequest(
CsrModel csrModel,
Cmpv2Server server,
Date notBefore,
Date notAfter)
throws CmpClientException {
validator.validate(csrModel, server, httpClient, notBefore, notAfter);
final CreateCertRequest certRequest = getIakRvRequest(csrModel, server, notBefore, notAfter, PKIBody.TYPE_INIT_REQ);
return executeCmpRequest(csrModel, server, certRequest);
}
@Override
public Cmpv2CertificationModel executeInitializationRequest(CsrModel csrModel, Cmpv2Server server)
throws CmpClientException {
return executeInitializationRequest(csrModel, server, null, null);
}
@Override
public Cmpv2CertificationModel executeKeyUpdateRequest(CsrModel csrModel, Cmpv2Server cmpv2Server,
OldCertificateModel oldCertificateModel) throws CmpClientException {
validator.validate(csrModel, cmpv2Server, httpClient, null, null);
final PkiMessageProtection pkiMessageProtection = getSignatureProtection(oldCertificateModel);
final CreateCertRequest certRequest =
getCmpMessageBuilderWithCommonRequestValues(csrModel, cmpv2Server)
.with(CreateCertRequest::setCmpRequestType, PKIBody.TYPE_KEY_UPDATE_REQ)
.with(CreateCertRequest::setExtraCerts, getCMPCertificate(oldCertificateModel.getOldCertificate()))
.with(CreateCertRequest::setProtection, pkiMessageProtection)
.build();
return executeCmpRequest(csrModel, cmpv2Server, certRequest);
}
@Override
public Cmpv2CertificationModel executeCertificationRequest(CsrModel csrModel, Cmpv2Server cmpv2Server) throws CmpClientException {
validator.validate(csrModel, cmpv2Server, httpClient, null, null);
final CreateCertRequest certRequest = getIakRvRequest(csrModel, cmpv2Server, null, null, PKIBody.TYPE_CERT_REQ);
return executeCmpRequest(csrModel, cmpv2Server, certRequest);
}
private CreateCertRequest getIakRvRequest(
CsrModel csrModel,
Cmpv2Server server,
Date notBefore,
Date notAfter,
int requestType) {
final String iak = server.getAuthentication().getIak();
final PkiMessageProtection pkiMessageProtection = new PasswordBasedProtection(iak);
return getCmpMessageBuilderWithCommonRequestValues(csrModel, server)
.with(CreateCertRequest::setNotBefore, notBefore)
.with(CreateCertRequest::setNotAfter, notAfter)
.with(CreateCertRequest::setSenderKid, server.getAuthentication().getRv())
.with(CreateCertRequest::setCmpRequestType, requestType)
.with(CreateCertRequest::setProtection, pkiMessageProtection)
.build();
}
private Cmpv2CertificationModel executeCmpRequest(CsrModel csrModel, Cmpv2Server cmpv2Server,
CreateCertRequest certRequest) throws CmpClientException {
final PKIMessage pkiMessage = certRequest.generateCertReq();
Cmpv2HttpClient cmpv2HttpClient = new Cmpv2HttpClient(httpClient);
return retrieveCertificates(csrModel, cmpv2Server, pkiMessage, cmpv2HttpClient);
}
private CmpMessageBuilder<CreateCertRequest> getCmpMessageBuilderWithCommonRequestValues(CsrModel csrModel,
Cmpv2Server cmpv2Server) {
KeyPair keyPair = new KeyPair(csrModel.getPublicKey(), csrModel.getPrivateKey());
return CmpMessageBuilder.of(CreateCertRequest::new)
.with(CreateCertRequest::setIssuerDn, cmpv2Server.getIssuerDN())
.with(CreateCertRequest::setSubjectDn, csrModel.getSubjectData())
.with(CreateCertRequest::setSansArray, csrModel.getSans())
.with(CreateCertRequest::setSubjectKeyPair, keyPair);
}
private SignatureProtection getSignatureProtection(OldCertificateModel oldCertificateModel) {
return new SignatureProtection(oldCertificateModel.getOldPrivateKey());
}
private CMPCertificate[] getCMPCertificate(Certificate oldCertificate) {
CMPCertificate cert = new CMPCertificate(oldCertificate);
return new CMPCertificate[]{cert};
}
private Cmpv2CertificationModel retrieveCertificates(
CsrModel csrModel, Cmpv2Server server, PKIMessage pkiMessage, Cmpv2HttpClient cmpv2HttpClient)
throws CmpClientException {
final byte[] respBytes = cmpv2HttpClient.postRequest(pkiMessage, server.getUrl(), server.getCaName());
try {
final PKIMessage respPkiMessage = PKIMessage.getInstance(respBytes);
LOG.info("Received response from Server");
checkIfCmpResponseContainsError(respPkiMessage);
validator.checkCmpResponse(respPkiMessage, csrModel.getPublicKey(), server.getAuthentication().getIak());
return checkCmpCertRepMessage(respPkiMessage);
} catch (IllegalArgumentException iae) {
CmpClientException cmpClientException =
new CmpClientException(
"Error encountered while processing response from CA server ", iae);
LOG.error("Error encountered while processing response from CA server ", iae);
throw cmpClientException;
}
}
private Cmpv2CertificationModel checkCmpCertRepMessage(final PKIMessage respPkiMessage)
throws CmpClientException {
final PKIBody pkiBody = respPkiMessage.getBody();
if (Objects.nonNull(pkiBody) && pkiBody.getContent() instanceof CertRepMessage) {
final CertRepMessage certRepMessage = (CertRepMessage) pkiBody.getContent();
if (Objects.nonNull(certRepMessage)) {
try {
CertResponse certResponse = getCertificateResponseContainingNewCertificate(certRepMessage);
validator.checkServerResponse(certResponse);
return verifyReturnCertChainAndTrustStore(respPkiMessage, certRepMessage, certResponse);
} catch (IOException | CertificateParsingException ex) {
CmpClientException cmpClientException =
new CmpClientException(
"Exception occurred while retrieving Certificates from response", ex);
LOG.error("Exception occurred while retrieving Certificates from response", ex);
throw cmpClientException;
}
} else {
return new Cmpv2CertificationModel(Collections.emptyList(), Collections.emptyList());
}
}
return new Cmpv2CertificationModel(Collections.emptyList(), Collections.emptyList());
}
private Cmpv2CertificationModel verifyReturnCertChainAndTrustStore(
PKIMessage respPkiMessage, CertRepMessage certRepMessage, CertResponse certResponse)
throws CertificateParsingException, CmpClientException, IOException {
LOG.info("Verifying certificates returned as part of CertResponse.");
final CMPCertificate cmpCertificate =
certResponse.getCertifiedKeyPair().getCertOrEncCert().getCertificate();
final Optional<X509Certificate> leafCertificate =
getCertFromByteArray(cmpCertificate.getEncoded(), X509Certificate.class);
if (leafCertificate.isPresent()) {
return verifyAndReturnCertChainAndTrustSTore(
respPkiMessage, certRepMessage, leafCertificate.get());
}
return new Cmpv2CertificationModel(Collections.emptyList(), Collections.emptyList());
}
private CertResponse getCertificateResponseContainingNewCertificate(
CertRepMessage certRepMessage) {
return certRepMessage.getResponse()[0];
}
}
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