content: /**
   * Copyright (C) 2013-2016 Open Whisper Systems
   *
   * Licensed according to the LICENSE file in this repository.
   */
  
  package org.whispersystems.libsignal.ecc;
  
  import org.whispersystems.libsignal.util.ByteUtil;
  
  import java.math.BigInteger;
  import java.util.Arrays;
  
  public class DjbECPublicKey implements ECPublicKey {
  
    private final byte[] publicKey;
  
    DjbECPublicKey(byte[] publicKey) {
      this.publicKey = publicKey;
    }
  
    @Override
    public byte[] serialize() {
      byte[] type = {Curve.DJB_TYPE};
      return ByteUtil.combine(type, publicKey);
    }
  
    @Override
    public int getType() {
      return Curve.DJB_TYPE;
    }
  
    @Override
    public boolean equals(Object other) {
      if (other == null)                      return false;
      if (!(other instanceof DjbECPublicKey)) return false;
  
      DjbECPublicKey that = (DjbECPublicKey)other;
      return Arrays.equals(this.publicKey, that.publicKey);
    }
  
    @Override
    public int hashCode() {
      return Arrays.hashCode(publicKey);
    }
  
    @Override
    public int compareTo(ECPublicKey another) {
      return new BigInteger(publicKey).compareTo(new BigInteger(((DjbECPublicKey)another).publicKey));
    }
  
    public byte[] getPublicKey() {
      return publicKey;
    }
  }
  