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 org.libsodium.jni.SodiumConstants;
  import static org.libsodium.jni.NaCl.sodium;
  
  /**
   * @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 Hash {
  
      private static final int KEY_LEN = 64;
      private static final int SALTBYTES = 32;
      private byte[] buffer;
  
      public byte[] sha256(byte[] message) {
          buffer = new byte[SodiumConstants.SHA256BYTES];
          sodium().crypto_hash_sha256(buffer, message, message.length);
          return buffer;
      }
  
      public byte[] sha512(byte[] message) {
          buffer = new byte[SodiumConstants.SHA512BYTES];
          sodium().crypto_hash_sha512(buffer, message, message.length);
          return buffer;
      }
  
      public String sha256(String message, Encoder encoder) {
          byte[] hash = sha256(message.getBytes());
          return encoder.encode(hash);
      }
  
      public String sha512(String message, Encoder encoder) {
          byte[] hash = sha512(message.getBytes());
          return encoder.encode(hash);
      }
  
      public String pwhash_scryptsalsa208sha256(String passwd, Encoder encoder, byte[] salt, int opslimit, int memlimit) {
          buffer = new byte[KEY_LEN];
          //sodium().crypto_pwhash(buffer, buffer.length, passwd.getBytes(), passwd.length(), salt, opslimit, memlimit,sodium().crypto_pwhash_alg_default());
  
          sodium().crypto_pwhash_scryptsalsa208sha256(buffer, buffer.length, passwd.getBytes(), passwd.length(), salt, opslimit, memlimit);
          return encoder.encode(buffer);
      }
  
      public byte[] blake2(byte[] message) throws UnsupportedOperationException {
          if (!blakeSupportedVersion()) throw new UnsupportedOperationException();
  
          buffer = new byte[SodiumConstants.BLAKE2B_OUTBYTES];
          sodium().crypto_generichash_blake2b(buffer, SodiumConstants.BLAKE2B_OUTBYTES, message, message.length, new byte[0], 0);
          return buffer;
      }
  
      public String blake2(String message, Encoder encoder) throws UnsupportedOperationException {
          if (!blakeSupportedVersion()) throw new UnsupportedOperationException();
          byte[] hash = blake2(message.getBytes());
          return encoder.encode(hash);
      }
  
      private boolean blakeSupportedVersion(){
  	String sodiumversion=new String("0.4.1");
          return sodiumversion.compareTo("0.4.0") >= 0 ;
      }
  
  }
  