package org.jastacry.layer;
   
   import java.nio.charset.StandardCharsets;
   import java.security.MessageDigest;
   import java.security.NoSuchAlgorithmException;
   import java.util.Arrays;
   
   import javax.crypto.spec.SecretKeySpec;
   
  import org.jastacry.JastacryException;
  
  /**
   * AES Layer class.
   *
   * <p>SPDX-License-Identifier: MIT
   *
   * @author Kai Kretschmann
   */
  public class AesEcbLayer extends AbstractCipherLayer
  {
      /**
       * static name of the layer.
       */
      public static final String LAYERNAME = "AES ECB Layer";
  
      /**
       * Used algorithm name.
       */
      private static final String MYALG = "AES/ECB/PKCS5Padding";
  
      /**
       * Used algorithm name for the key.
       */
      private static final String MYKEYALG = "AES";
  
      /**
       * Used algorithm name for the key hash.
       */
      private static final String MYHASHALG = "SHA-256";
  
      /**
       * IV length.
       */
      private static final int IVLEN = 0;
  
      /**
       * Salt length.
       */
      private static final int SALTLEN = 0;
  
      /**
       * Iteration count.
       */
      private static final int COUNT = 0;
  
      /**
       * Size of key.
       */
      private static final int KEYSIZE = 128;
  
      /**
       * Constructor of AesLayer.
       */
      public AesEcbLayer()
      {
          super(AesEcbLayer.class, LAYERNAME);
      }
  
      /**
       * Generate Keys from plain password.
       *
       * @throws JastacryException on error
       */
      @Override
      protected final void setupPbe() throws JastacryException
      {
          MessageDigest sha;
          try
          {
              sha = MessageDigest.getInstance(MYHASHALG);
              final byte[] keyPlaintext = new String(chPasswd).getBytes(StandardCharsets.UTF_8);
              final byte[] keyDigest = sha.digest(keyPlaintext);
              final byte[] keyDigestTrimmed = Arrays.copyOf(keyDigest, KEYSIZE / BITSPERBYTE);
  
              pbeSecretKeySpec = new SecretKeySpec(keyDigestTrimmed, MYKEYALG);
          }
          catch (NoSuchAlgorithmException e)
          {
              throw (JastacryExceptionl#JastacryException">JastacryException) new JastacryException("Setup PBE failed").initCause(e);
          }
  
      }
  
      /**
       * init function. Overrides base init but uses it for setting base values.
       *
       * @param data to initialize the crypt value.
       */
      @Override
     public final void init(final String data)
     {
         super.init();
 
         this.chPasswd = data.toCharArray();
     }
 
     @Override
     protected final String getMyAlg()
     {
         return MYALG;
     }
 
     @Override
     protected final String getMyKeyAlg()
     {
         return MYKEYALG;
     }
 
     @Override
     protected int getMySaltLen()
     {
         return SALTLEN;
     }
 
     @Override
     protected int getMyIvLen()
     {
         return IVLEN;
     }
 
     @Override
     protected int getMyCount()
     {
         return COUNT;
     }
 
     @Override
     protected int getMyKeysize()
     {
         return KEYSIZE;
     }
 
     /**
      * Override equals method from object class.
      * @param o object to compare with
      * @return true or false
      */
     @Override
     public boolean equals(final Object o)
     {
         if (o == this)
         {
             return true;
         }
         if (!(o instanceof AesEcbLayer))
         {
             return false;
         }
 
         final AesEcbLayer./../org/jastacry/layer/AesEcbLayer.html#AesEcbLayer">AesEcbLayer layer = (AesEcbLayer) o;
         return Arrays.equals(layer.chPasswd, this.chPasswd);
     }
 
     /**
      * Override equals method from object class.
      * @return hash of properties
      */
     @Override
     public int hashCode()
     {
         return Arrays.hashCode(chPasswd);
     }
 }