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.arrow.flight.auth;
  
  import io.grpc.Context;
  import io.grpc.Metadata;
  import io.grpc.Metadata.BinaryMarshaller;
  import io.grpc.MethodDescriptor;
  import org.apache.arrow.flight.FlightConstants;
  
  /** Constants used in authorization of flight connections. */
  public final class AuthConstants {
  
    public static final String HANDSHAKE_DESCRIPTOR_NAME =
        MethodDescriptor.generateFullMethodName(FlightConstants.SERVICE, "Handshake");
    public static final String TOKEN_NAME = "Auth-Token-bin";
    public static final Metadata.Key<byte[]> TOKEN_KEY =
        Metadata.Key.of(
            TOKEN_NAME,
            new BinaryMarshaller<byte[]>() {
  
              @Override
              public byte[] toBytes(byte[] value) {
                return value;
              }
  
              @Override
              public byte[] parseBytes(byte[] serialized) {
                return serialized;
              }
            });
  
    public static final Context.Key<String> PEER_IDENTITY_KEY =
        Context.keyWithDefault("arrow-flight-peer-identity", "");
  
    private AuthConstants() {}
  }
  