/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */
package org.apache.nifi.security.ssl;

import java.io.InputStream;
import java.security.cert.Certificate;
import java.util.List;

/**
 * Abstraction for reading one or more Certificates from a stream containing PEM headers and footers
 */
interface PemCertificateReader {
    /**
     * Read Certificates from stream of PEM sections
     *
     * @param inputStream Input Stream required
     * @return Parsed certificates or empty when none found
     */
    List<Certificate> readCertificates(InputStream inputStream);
}
