2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2021 Nokia.
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 * SPDX-License-Identifier: Apache-2.0
18 * ============LICENSE_END=========================================================
21 package org.onap.oom.certservice.certification.conversion;
23 import org.bouncycastle.util.io.pem.PemObject;
24 import org.onap.oom.certservice.certification.exception.KeyDecryptionException;
26 import java.security.KeyFactory;
27 import java.security.NoSuchAlgorithmException;
28 import java.security.PrivateKey;
29 import java.security.spec.InvalidKeySpecException;
30 import java.security.spec.PKCS8EncodedKeySpec;
32 public class StringBase64ToPrivateKeyConverter {
34 private final PemObjectFactory pemObjectFactory = new PemObjectFactory();
36 public PrivateKey convert(StringBase64 privateKey) throws KeyDecryptionException {
37 PemObject decodedPrivateKey = createDecodedPrivateKey(privateKey);
39 KeyFactory factory = KeyFactory.getInstance("RSA");
40 PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(decodedPrivateKey.getContent());
41 return factory.generatePrivate(keySpec);
42 } catch (NoSuchAlgorithmException | InvalidKeySpecException e) {
43 throw new KeyDecryptionException("Converting Private Key failed", e.getCause());
47 private PemObject createDecodedPrivateKey(StringBase64 privateKey) throws KeyDecryptionException {
48 return privateKey.asString()
49 .flatMap(pemObjectFactory::createPemObject)
51 () -> new KeyDecryptionException("Incorrect Key, decryption failed")