2 * ============LICENSE_START=======================================================
3 * aaf-certservice-client
4 * ================================================================================
5 * Copyright (C) 2020 Nokia. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============LICENSE_END=========================================================
21 package org.onap.aaf.certservice.client.certification;
25 import java.io.IOException;
26 import java.io.StringWriter;
27 import java.security.PrivateKey;
29 import org.bouncycastle.openssl.jcajce.JcaPEMWriter;
30 import org.bouncycastle.util.io.pem.PemObject;
31 import org.onap.aaf.certservice.client.certification.exception.PkEncodingException;
32 import org.slf4j.Logger;
33 import org.slf4j.LoggerFactory;
35 public class PrivateKeyToPemEncoder {
37 public static final String PEM_OBJECT_TYPE = "RSA PRIVATE KEY";
38 private final Logger LOGGER = LoggerFactory.getLogger(PrivateKeyToPemEncoder.class);
40 public String encodePrivateKeyToPem(PrivateKey pk) throws PkEncodingException {
41 LOGGER.info("Encoding PrivateKey to PEM");
42 StringWriter stringWriter = new StringWriter();
43 try (JcaPEMWriter pemWriter = new JcaPEMWriter(stringWriter)) {
44 pemWriter.writeObject(new PemObject(PEM_OBJECT_TYPE, pk.getEncoded()));
45 } catch (IOException e) {
46 LOGGER.error("Exception occurred during encoding PrivateKey to PEM", e);
47 throw new PkEncodingException(e);
49 return stringWriter.toString();