content: /*
   * 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.camel.quarkus.component.as2.it;
  
  import java.io.IOException;
  import java.math.BigInteger;
  import java.security.GeneralSecurityException;
  import java.security.KeyPair;
  import java.security.KeyPairGenerator;
  import java.security.PrivateKey;
  import java.security.PublicKey;
  import java.security.SecureRandom;
  import java.security.Security;
  import java.security.cert.X509Certificate;
  import java.time.Duration;
  import java.util.ArrayList;
  import java.util.Date;
  import java.util.List;
  
  import org.apache.camel.component.as2.api.AS2ClientConnection;
  import org.apache.camel.component.as2.api.AS2ClientManager;
  import org.bouncycastle.asn1.x500.X500Name;
  import org.bouncycastle.asn1.x509.AuthorityKeyIdentifier;
  import org.bouncycastle.asn1.x509.Extension;
  import org.bouncycastle.asn1.x509.SubjectKeyIdentifier;
  import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;
  import org.bouncycastle.cert.X509v3CertificateBuilder;
  import org.bouncycastle.cert.bc.BcX509ExtensionUtils;
  import org.bouncycastle.cert.jcajce.JcaX509CertificateConverter;
  import org.bouncycastle.cert.jcajce.JcaX509v3CertificateBuilder;
  import org.bouncycastle.jce.provider.BouncyCastleProvider;
  import org.bouncycastle.operator.OperatorCreationException;
  import org.bouncycastle.operator.jcajce.JcaContentSignerBuilder;
  
  public class As2CertificateHelper {
  
      private static final String TARGET_HOST = "localhost";
      private static final String AS2_VERSION = "1.1";
      private static final String USER_AGENT = "Camel AS2 Endpoint";
      private static final String CLIENT_FQDN = "example.org";
      private static final Duration HTTP_SOCKET_TIMEOUT = Duration.ofSeconds(5);
      private static final Duration HTTP_CONNECTION_TIMEOUT = Duration.ofSeconds(5);
      private static final Integer HTTP_CONNECTION_POOL_SIZE = 5;
      private static final Duration HTTP_CONNECTION_POOL_TTL = Duration.ofMinutes(15);
  
      private static KeyPair signingKP;
      private static X509Certificate signingCert;
      private static List<X509Certificate> certList;
      // certificate serial number seed.
      static int serialNo = 1;
  
      private As2CertificateHelper() {
      }
  
      public static void setup() throws Exception {
          Security.addProvider(new BouncyCastleProvider());
  
          //
          // set up our certificates
          //
          KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA", "BC");
  
          kpg.initialize(1024, new SecureRandom());
  
          String issueDN = "O=Punkhorn Software, C=US";
          KeyPair issueKP = kpg.generateKeyPair();
          X509Certificate issueCert = makeCertificate(
                  issueKP, issueDN, issueKP, issueDN);
  
          //
          // certificate we sign against
          //
          String signingDN = "CN=Shekdon, E=test@gmail.com, O=Punkhorn Software, C=US";
          signingKP = kpg.generateKeyPair();
          signingCert = makeCertificate(
                  signingKP, signingDN, issueKP, issueDN);
  
          certList = new ArrayList<>();
  
          certList.add(signingCert);
          certList.add(issueCert);
  
      }
  
      /**
       * create a basic X509 certificate from the given keys
       */
      public static X509Certificate makeCertificate(KeyPair subKP, String subDN, KeyPair issKP, String issDN)
              throws GeneralSecurityException, IOException, OperatorCreationException {
          PublicKey subPub = subKP.getPublic();
          PrivateKey issPriv = issKP.getPrivate();
          PublicKey issPub = issKP.getPublic();
  
          X509v3CertificateBuilder v3CertGen = new JcaX509v3CertificateBuilder(new X500Name(issDN),
                  BigInteger.valueOf(serialNo++), new Date(System.currentTimeMillis()),
                  new Date(System.currentTimeMillis() + (1000L * 60 * 60 * 24 * 100)), new X500Name(subDN), subPub);
  
          v3CertGen.addExtension(Extension.subjectKeyIdentifier, false, createSubjectKeyId(subPub));
  
          v3CertGen.addExtension(Extension.authorityKeyIdentifier, false, createAuthorityKeyId(issPub));
  
          return new JcaX509CertificateConverter().setProvider("BC").getCertificate(
                  v3CertGen.build(new JcaContentSignerBuilder("MD5withRSA").setProvider("BC").build(issPriv)));
      }
  
      public static AuthorityKeyIdentifier createAuthorityKeyId(PublicKey pub) throws IOException {
          SubjectPublicKeyInfo info = SubjectPublicKeyInfo.getInstance(pub.getEncoded());
  
          BcX509ExtensionUtils utils = new BcX509ExtensionUtils();
          return utils.createAuthorityKeyIdentifier(info);
      }
  
      public static SubjectKeyIdentifier createSubjectKeyId(PublicKey pub) throws IOException {
          SubjectPublicKeyInfo info = SubjectPublicKeyInfo.getInstance(pub.getEncoded());
  
          return new BcX509ExtensionUtils().createSubjectKeyIdentifier(info);
      }
  
      public static AS2ClientManager createClient(int port) throws IOException {
          AS2ClientConnection clientConnection = createClientConnection(port);
          return new AS2ClientManager(clientConnection);
      }
  
      public static AS2ClientConnection createClientConnection(int port) throws IOException {
          AS2ClientConnection clientConnection = new AS2ClientConnection(
                  AS2_VERSION,
                  USER_AGENT,
                  CLIENT_FQDN,
                  TARGET_HOST,
                  port,
                  HTTP_SOCKET_TIMEOUT,
                  HTTP_CONNECTION_TIMEOUT,
                  HTTP_CONNECTION_POOL_SIZE,
                  HTTP_CONNECTION_POOL_TTL,
                  null,
                  null);
          return clientConnection;
      }
  
      public static List<X509Certificate> getCertList() {
          return certList;
      }
  
      public static KeyPair getSigningKP() {
          return signingKP;
      }
  }
  