Examples of org.bouncycastle.crypto.engines.AESEngine

org.bouncycastle.crypto.engines.AESEngine
nist.gov/encryption/aes/">http://csrc.nist.gov/encryption/aes/. This implementation is based on optimizations from Dr. Brian Gladman's paper and C code at http://fp.gladman.plus.com/cryptography_technology/rijndael/ There are three levels of tradeoff of speed vs memory Because java has no preprocessor, they are written as three separate classes from which to choose The fastest uses 8Kbytes of static tables to precompute round calculations, 4 256 word tables for encryption and 4 for decryption. The middle performance version uses only one 256 word table for each, for a total of 2Kbytes, adding 12 rotate operations per round to compute the values contained in the other tables from the contents of the first. The slowest version uses no static tables at all and computes the values in each round.
This file contains the middle performance version with 2Kbytes of static tables for round precomputation.

    super(id, algorithm, keySize, ivSize, needsUnlimitedStrength);
  }
    
  @Override
  public OutputStream newCipherOutputStream(OutputStream underlyingOutputStream, byte[] secretKey, byte[] iv) throws CipherException {
    AEADBlockCipher cipher = new GCMBlockCipher(new AESEngine()); 
    cipher.init(true, new AEADParameters(new KeyParameter(secretKey), MAC_SIZE, iv));
    
    return new org.bouncycastle.crypto.io.CipherOutputStream(underlyingOutputStream, cipher);
  }

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    return new org.bouncycastle.crypto.io.CipherOutputStream(underlyingOutputStream, cipher);
  }


  @Override
  public InputStream newCipherInputStream(InputStream underlyingInputStream, byte[] secretKey, byte[] iv) throws CipherException {
    AEADBlockCipher cipher = new GCMBlockCipher(new AESEngine()); 
    cipher.init(false, new AEADParameters(new KeyParameter(secretKey), MAC_SIZE, iv));
    
    return new org.bouncycastle.crypto.io.CipherInputStream(underlyingInputStream, cipher);
  }

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   * @return The AES cipher.
   */
  public static AESEngine createCipher(final SecretKey secretKey, 
                                 final boolean forEncryption) {


    AESEngine cipher = new AESEngine();


    CipherParameters cipherParams = new KeyParameter(secretKey.getEncoded());


    cipher.init(forEncryption, cipherParams);


    return cipher;
  }

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