Class RijndaelEngine

  • All Implemented Interfaces:
    BlockCipher

    public class RijndaelEngine
    extends Object
    implements BlockCipher
    an implementation of Rijndael, based on the documentation and reference implementation by Paulo Barreto, Vincent Rijmen, for v2.0 August '99.

    Note: this implementation is based on information prior to final NIST publication.

    • Constructor Detail

      • RijndaelEngine

        public RijndaelEngine()
        default constructor - 128 bit block size.
      • RijndaelEngine

        public RijndaelEngine​(int blockBits)
        basic constructor - set the cipher up for a given blocksize
        Parameters:
        blockBits - the blocksize in bits, must be 128, 192, or 256.
    • Method Detail

      • init

        public void init​(boolean forEncryption,
                         CipherParameters params)
        initialise a Rijndael cipher.
        Specified by:
        init in interface BlockCipher
        Parameters:
        forEncryption - whether or not we are for encryption.
        params - the parameters required to set up the cipher.
        Throws:
        IllegalArgumentException - if the params argument is inappropriate.
      • getAlgorithmName

        public String getAlgorithmName()
        Description copied from interface: BlockCipher
        Return the name of the algorithm the cipher implements.
        Specified by:
        getAlgorithmName in interface BlockCipher
        Returns:
        the name of the algorithm the cipher implements.
      • getBlockSize

        public int getBlockSize()
        Description copied from interface: BlockCipher
        Return the block size for this cipher (in bytes).
        Specified by:
        getBlockSize in interface BlockCipher
        Returns:
        the block size for this cipher in bytes.
      • processBlock

        public int processBlock​(byte[] in,
                                int inOff,
                                byte[] out,
                                int outOff)
        Description copied from interface: BlockCipher
        Process one block of input from the array in and write it to the out array.
        Specified by:
        processBlock in interface BlockCipher
        Parameters:
        in - the array containing the input data.
        inOff - offset into the in array the data starts at.
        out - the array the output data will be copied into.
        outOff - the offset into the out array the output will start at.
        Returns:
        the number of bytes processed and produced.
      • reset

        public void reset()
        Description copied from interface: BlockCipher
        Reset the cipher. After resetting the cipher is in the same state as it was after the last init (if there was one).
        Specified by:
        reset in interface BlockCipher