Method Detail

• init

  void init​(boolean forEncryption,
            CipherParameters params)
     throws java.lang.IllegalArgumentException

  Initialise the cipher.

  Parameters:

  forEncryption - if true the cipher is initialised for encryption, if false for decryption.

  params - the key and other data required by the cipher.

  Throws:

  java.lang.IllegalArgumentException - if the params argument is inappropriate.

• getAlgorithmName

  java.lang.String getAlgorithmName()

  Return the name of the algorithm the cipher implements.

  Returns:

  the name of the algorithm the cipher implements.

• returnByte

  byte returnByte​(byte in)

  encrypt/decrypt a single byte returning the result.

  Parameters:

  in - the byte to be processed.

  Returns:

  the result of processing the input byte.

• processBytes

  int processBytes​(byte[] in,
                   int inOff,
                   int len,
                   byte[] out,
                   int outOff)
            throws DataLengthException

  process a block of bytes from in putting the result into out.

  Parameters:

  in - the input byte array.

  inOff - the offset into the in array where the data to be processed starts.

  len - the number of bytes to be processed.

  out - the output buffer the processed bytes go into.

  outOff - the offset into the output byte array the processed data starts at.

  Returns:

  the number of bytes produced - should always be len.

  Throws:

  DataLengthException - if the output buffer is too small.

• reset

  void reset()

  reset the cipher. This leaves it in the same state it was at after the last init (if there was one).