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/*
 * Copyright (c) 2011-2014 The original author or authors
 * ------------------------------------------------------
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Apache License v2.0 which accompanies this distribution.
 *
 *     The Eclipse Public License is available at
 *     http://www.eclipse.org/legal/epl-v10.html
 *
 *     The Apache License v2.0 is available at
 *     http://www.opensource.org/licenses/apache2.0.php
 *
 * You may elect to redistribute this code under either of these licenses.
 */

package io.vertx.core.net;

import io.vertx.codegen.annotations.DataObject;
import io.vertx.core.buffer.Buffer;
import io.vertx.core.impl.Arguments;
import io.vertx.core.json.JsonArray;
import io.vertx.core.json.JsonObject;

import java.util.ArrayList;
import java.util.Base64;
import java.util.List;
import java.util.Objects;

/**
 * Certificate Authority options configuring certificates based on
 * Privacy-enhanced Electronic Email (PEM) files. The options is configured with a list of
 * validating certificates.
 * 
 * Validating certificates must contain X.509 certificates wrapped in a PEM block:

 *
 * 
 * -----BEGIN CERTIFICATE-----
 * MIIDezCCAmOgAwIBAgIEVmLkwTANBgkqhkiG9w0BAQsFADBuMRAwDgYDVQQGEwdV
 * ...
 * z5+DuODBJUQst141Jmgq8bS543IU/5apcKQeGNxEyQ==
 * -----END CERTIFICATE-----
 * 
 *
 * The certificates can either be loaded by Vert.x from the filesystem:
 * 
 * 
 * HttpServerOptions options = new HttpServerOptions();
 * options.setPemTrustOptions(new PemTrustOptions().addCertPath("/cert.pem"));
 * 
 *
 * Or directly provided as a buffer:
 * 
 *
 * 
 * Buffer cert = vertx.fileSystem().readFileSync("/cert.pem");
 * HttpServerOptions options = new HttpServerOptions();
 * options.setPemTrustOptions(new PemTrustOptions().addCertValue(cert));
 * 
 *
 * @author Julien Viet
 * @author Tim Fox
 */
@DataObject(generateConverter = true)
public class PemTrustOptions implements TrustOptions, Cloneable {

  private ArrayList certPaths;
  private ArrayList certValues;

  /**
   * Default constructor
   */
  public PemTrustOptions() {
    super();
    this.certPaths = new ArrayList<>();
    this.certValues = new ArrayList<>();
  }

  /**
   * Copy constructor
   *
   * @param other  the options to copy
   */
  public PemTrustOptions(PemTrustOptions other) {
    super();
    this.certPaths = new ArrayList<>(other.getCertPaths());
    this.certValues = new ArrayList<>(other.getCertValues());
  }

  /**
   * Create options from JSON
   *
   * @param json  the JSON
   */
  public PemTrustOptions(JsonObject json) {
    this();
    PemTrustOptionsConverter.fromJson(json, this);
  }

  /**
   * @return  the certificate paths used to locate certificates
   */
  public List getCertPaths() {
    return certPaths;
  }

  /**
   * Add a certificate path
   *
   * @param certPath  the path to add
   * @return a reference to this, so the API can be used fluently
   * @throws NullPointerException
   */
  public PemTrustOptions addCertPath(String certPath) throws NullPointerException {
    Objects.requireNonNull(certPath, "No null certificate accepted");
    Arguments.require(!certPath.isEmpty(), "No empty certificate path accepted");
    certPaths.add(certPath);
    return this;
  }

  /**
   *
   * @return the certificate values
   */
  public List getCertValues() {
    return certValues;
  }

  /**
   * Add a certificate value
   *
   * @param certValue  the value to add
   * @return a reference to this, so the API can be used fluently
   * @throws NullPointerException
   */
  public PemTrustOptions addCertValue(Buffer certValue) throws NullPointerException {
    Objects.requireNonNull(certValue, "No null certificate accepted");
    certValues.add(certValue);
    return this;
  }

  @Override
  public PemTrustOptions clone() {
    return new PemTrustOptions(this);
  }

}