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.libsodium.jni.crypto;
  
  import org.libsodium.jni.encoders.Encoder;
  
  import static org.libsodium.jni.SodiumConstants.BOXZERO_BYTES;
  import static org.libsodium.jni.SodiumConstants.XSALSA20_POLY1305_SECRETBOX_NONCEBYTES;
  import static org.libsodium.jni.SodiumConstants.XSALSA20_POLY1305_SECRETBOX_KEYBYTES;
  import static org.libsodium.jni.SodiumConstants.ZERO_BYTES;
  import static org.libsodium.jni.NaCl.sodium;
  import static org.libsodium.jni.crypto.Util.checkLength;
  import static org.libsodium.jni.crypto.Util.isValid;
  import static org.libsodium.jni.crypto.Util.removeZeros;
  
  /**
   * @deprecated
   * These are wrapper methods around the sodium api methods.
   * These methods were brought in from another project and will be replaced with method signatures that define exceptions.
   */
  @Deprecated
  public class SecretBox {
  
      private byte[] key;
  
      public SecretBox(byte[] key) {
          this.key = key;
          checkLength(key, XSALSA20_POLY1305_SECRETBOX_KEYBYTES);
      }
  
      public SecretBox(String key, Encoder encoder) {
          this(encoder.decode(key));
      }
  
      public byte[] encrypt(byte[] nonce, byte[] message) {
          checkLength(nonce, XSALSA20_POLY1305_SECRETBOX_NONCEBYTES);
          byte[] msg = Util.prependZeros(ZERO_BYTES, message);
          byte[] ct = Util.zeros(msg.length);
          isValid(sodium().crypto_secretbox_xsalsa20poly1305(ct, msg, msg.length,
                  nonce, key), "Encryption failed");
          return removeZeros(BOXZERO_BYTES, ct);
      }
  
      public byte[] decrypt(byte[] nonce, byte[] ciphertext) {
          checkLength(nonce, XSALSA20_POLY1305_SECRETBOX_NONCEBYTES);
          byte[] ct = Util.prependZeros(BOXZERO_BYTES, ciphertext);
          byte[] message = Util.zeros(ct.length);
          isValid(sodium().crypto_secretbox_xsalsa20poly1305_open(message, ct,
                  ct.length, nonce, key), "Decryption failed. Ciphertext failed verification");
          return removeZeros(ZERO_BYTES, message);
      }
  }
  