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 io.vertx.ext.auth.mtls.impl;
  
  import java.util.List;
  
  import io.vertx.core.AsyncResult;
  import io.vertx.core.Future;
  import io.vertx.core.Handler;
  import io.vertx.core.Vertx;
  import io.vertx.core.json.JsonObject;
  import io.vertx.ext.auth.User;
  import io.vertx.ext.auth.authentication.AuthenticationProvider;
  import io.vertx.ext.auth.authentication.CertificateCredentials;
  import io.vertx.ext.auth.authentication.Credentials;
  import io.vertx.ext.auth.mtls.CertificateIdentityExtractor;
  import io.vertx.ext.auth.mtls.CertificateValidator;
  import io.vertx.ext.auth.mtls.MutualTlsAuthentication;
  
  /**
   * {@link AuthenticationProvider} implementation for mTLS (MutualTLS) authentication. With mTLS authentication
   * both server and client exchange certificates and validates each other's certificates.
   */
  public class MutualTlsAuthenticationImpl implements MutualTlsAuthentication
  {
      private final Vertx vertx;
      private final CertificateValidator certificateValidator;
      private final CertificateIdentityExtractor identityExtractor;
  
      public MutualTlsAuthenticationImpl(Vertx vertx,
                                         CertificateValidator certificateValidator,
                                         CertificateIdentityExtractor identityExtractor)
      {
          this.vertx = vertx;
          this.certificateValidator = certificateValidator;
          this.identityExtractor = identityExtractor;
      }
  
      @Override
      public Future<User> authenticate(Credentials credentials)
      {
          if (!(credentials instanceof CertificateCredentials))
          {
              return Future.failedFuture("CertificateCredentials expected for mTLS authentication");
          }
  
          CertificateCredentials certificateCredentials = (CertificateCredentials) credentials;
          return vertx.executeBlocking(() -> {
              certificateCredentials.checkValid();
              certificateValidator.verifyCertificate(certificateCredentials);
              List<String> identities = identityExtractor.validIdentities(certificateCredentials);
              return MutualTlsUser.fromIdentities(identities);
          });
      }
  
      /**
       * Use {@code authenticate(Credentials credentials, Handler<AsyncResult<User>> resultHandler)} instead
       */
      @Deprecated
      @Override
      public void authenticate(JsonObject credentials, Handler<AsyncResult<User>> resultHandler)
      {
          throw new UnsupportedOperationException("Deprecated authentication method");
      }
  }
  