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 com.github.jobson.auth.jwt;
  
  import com.fasterxml.jackson.annotation.JsonProperty;
  import com.github.jobson.auth.AuthenticationBootstrap;
  import com.github.jobson.auth.PermitAllAuthorizer;
  import com.github.jobson.config.AuthenticationConfig;
  import io.dropwizard.auth.AuthFilter;
  import io.jsonwebtoken.SignatureAlgorithm;
  import org.hibernate.validator.constraints.NotEmpty;
  
  import javax.crypto.spec.SecretKeySpec;
  import javax.validation.constraints.NotNull;
  import java.security.Key;
  import java.security.Principal;
  import java.util.Base64;
  
  public final class JsonWebTokenConfig implements AuthenticationConfig {
  
      @JsonProperty
      @NotNull
      @NotEmpty
      private String secretKey;  // Base64 string
  
      /**
       * @deprecated Used by JSON deserializer.
       */
      public JsonWebTokenConfig() {}
  
      public JsonWebTokenConfig(String secretKey) {
          this.secretKey = secretKey;
      }
  
      public String getSecretKey() {
          return secretKey;
      }
  
      public SignatureAlgorithm getSignatureAlgorithm() {
          return SignatureAlgorithm.HS512;
      }
  
      @Override
      public AuthFilter<?, Principal> createAuthFilter(AuthenticationBootstrap bootstrap) {
          final byte[] decodedSecretKey = Base64.getDecoder().decode(secretKey);
          final Key secretKeyKey = new SecretKeySpec(decodedSecretKey, 0, decodedSecretKey.length, this.getSignatureAlgorithm().toString());
  
          return new JsonWebTokenAuthFilter.Builder<>()
                  .setAuthenticator(new JsonWebTokenAuthenticator(secretKeyKey, this.getSignatureAlgorithm()))
                  .setAuthorizer(new PermitAllAuthorizer())
                  .buildAuthFilter();
      }
  }
  