content: /**
   * Copyright 2013 Bruno Oliveira, and individual contributors
   *
   * Licensed 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.abstractj.kalium.keys;
  
  import org.abstractj.kalium.crypto.Point;
  import org.abstractj.kalium.encoders.Encoder;
  
  import static org.abstractj.kalium.NaCl.Sodium.CRYPTO_BOX_CURVE25519XSALSA20POLY1305_PUBLICKEYBYTES;
  import static org.abstractj.kalium.NaCl.Sodium.CRYPTO_BOX_CURVE25519XSALSA20POLY1305_SECRETKEYBYTES;
  import static org.abstractj.kalium.NaCl.sodium;
  import static org.abstractj.kalium.crypto.Util.checkLength;
  import static org.abstractj.kalium.crypto.Util.zeros;
  
  public class KeyPair {
  
      private final byte[] publicKey;
      private final byte[] secretKey;
  
      public KeyPair() {
          this.secretKey = zeros(CRYPTO_BOX_CURVE25519XSALSA20POLY1305_SECRETKEYBYTES);
          this.publicKey = zeros(CRYPTO_BOX_CURVE25519XSALSA20POLY1305_PUBLICKEYBYTES);
          sodium().crypto_box_curve25519xsalsa20poly1305_keypair(publicKey, secretKey);
      }
  
      public KeyPair(byte[] secretKey) {
          this.secretKey = secretKey;
          checkLength(this.secretKey, CRYPTO_BOX_CURVE25519XSALSA20POLY1305_SECRETKEYBYTES);
          Point point = new Point();
          this.publicKey = point.mult(secretKey).toBytes();
      }
  
      public KeyPair(String secretKey, Encoder encoder) {
          this(encoder.decode(secretKey));
      }
  
      public PublicKey getPublicKey() {
          return new PublicKey(publicKey);
      }
  
      public PrivateKey getPrivateKey() {
          return new PrivateKey(secretKey);
      }
  }
  